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06-27-16 Work Session Agenda and MaterialsCITY COUNCIL WORK SESSION AGENDA Monday, June 27, 2016, at 7:00 p.m. City Hall Council Chambers, 201 First Avenue East A. CALL TO ORDER B. DISCUSSION ITEMS 1. Zoning for Short Term Residential Rentals (VRBO's - Vacation Rentals By Owner 2. Request for Sewer Treatment from a Property Owner Outside of the Evergreen Sewer District 3. Water and Wastewater Facility Plan Update - South Kalispell Development C. PUBLIC COMMENT Persons wishing to address the council are asked to do so at this time. Those addressing the council are requested to give their name and address for the record. Please limit comments to three minutes. D. CITY MANAGER, COUNCIL, AND MAYOR REPORTS E. ADJOURNMENT UPCOMING SCHEDULE / FOR YOUR INFORMATION City offices will be closed Monday, July 4, 2016, for the Independence Day holiday. Regular Council Meeting — TUESDAY, July 5, 2016, at 7:00 p.m. — Council Chambers Council Work Session — July 11, 2016, at 7:00 p.m. — Council Chambers Reasonable accommodations will be made to enable individuals with disabilities to attend this meeting. Please notify the City Clerk at 758-7756. Page 1 of 1 PLANNING FOR THE FUTURE REPORT TO: FROM: SUBJECT MEETING DATE: Planning Department 201 V Avenue East Kalispell, MT 59901 Phone: (406) 758-7940 Fax: (406) 758-7739 www.kalispell.com/planninE rayCo ,#YW4 Doug Russell, City Manager PJ Sorensen, Planner Zoning for Short Term Residential Rentals June 27, 2016 Council Work Session BACKGROUND: As part of a continuing effort to up -date the zoning ordinance, staff compiled a list of amendments to the ordinance. The amendments were placed into fifteen general groupings and were discussed at a work session held by the Planning Board on March 8, 2016, and a public hearing before the Board on April 12, 2016. No comments were received, and the Planning Board sent a recommendation of approval to the City Council on a 7-0 vote. The City Council held a work session on April 25, 2016, to discuss the proposals. The Council then directed staff to present the proposals at the next regular meeting. At the May 2, 2016, Council meeting, the Council voted to separate the short term residential rental proposal from the other amendments and bring short term residential rental zoning amendments to the Council during the next work session, which occurred on May 9, 2016. At the conclusion of that work session, the Council asked for additional information and requested another work session. The current zoning ordinance defines "residential" to include rental periods of one month or more. Periods of time, less than one month, are either hotels or bed and breakfasts. Under that definition, short term rentals in commercial areas are considered permissible as a hotel use, but short term rentals in residential areas are not allowed. Although not generally allowed, a review of the VRBO (vacation rental by owner) website shows approximately 35 rentals within the city limits, with other rentals available through similar marketing websites. This number can fluctuate throughout the year, with the summer season being the busiest. These types of rentals have been increasing in popularity throughout the country with tourists, and with homeowners who can generate income. The Planning Office usually receives about 3 or 4 complaints each year about short term residential rentals from neighbors, typically regarding noise or traffic. Staff pursues each complaint and works to bring each into compliance, although many operators point to the other short term residential rentals operating in the city. The initial memo for the Planning Board work session (held in March) did not include any specific proposals from staff. Instead, the memo sought input on the direction staff should go with these uses. Options included (1) allowing short term rentals as a permitted use; (2) allowing them with certain conditions; and (3) keeping the current prohibition. There was also discussion about limiting them to certain areas of the city. At that work session, one property owner spoke in support of allowing short term rentals in the city The Planning Board felt that such uses could be acceptable in any residential area, but only subject to appropriate conditions. The Whitefish Planning Department was also consulted since they recently went through a major study on this topic. Based on those discussions, staff drafted an ordinance that would allow short term rentals with an administrative conditional use permit. Conditions would include fire department and health department approvals, compliance with bed tax regulations, providing contact information to the city, and posting ownership contact information at the property. At the most recent Council work session, there were several public comments both in support of the proposal and against it. During the discussion, several issues were raised that the Council felt warranted additional information and another work session. Since that time, staff has reviewed several different resources, including participating in a national webinar on short term rentals, reviewing a white paper from the National Association of Realtors submitted by a local realtor, and discussions with other state and local officials. In general, it is staff s belief based on research that, if Council wishes to allow short term rentals with conditions, the proposed ordinance covers the primary issues in a fair and reasonable manner. First, it is apparent that short term rentals, while a relatively recent development, are and will continue to be a significant property use throughout the nation. Airbnb alone has over four million listings in 36,000 cities, with $25.5 billion in revenue in 2015. By comparison, Hilton had $22 billion and Marriott had $18 billion. Whether or not the industry will continue to expand is speculative, but, as the webinar presentation noted, the biggest "don't" is don't ignore the issue. The communities with the biggest problems are the ones that did not get ahead of the curve. The webinar discussed several key reasons to regulate, which are also reflected in other resources such as: housing affordability; quality of life and neighborhood issues; economic development and tourist promotion; leveling the playing field with traditional lodging; and tax collection. Among the suggestions for regulation were: requiring a permit; building in accountability through inspections and local contact information; a mechanism for dealing with violators; ensuring that everyone pays their fair share of taxes; and avoiding an unenforceable system. Proposed Ordinance The threshold issue is whether or not short term rentals should be allowed, with or without regulations. Council could choose to allow them outright as a permitted use, could allow them with certain conditions, or continue the current prohibition. There is not necessarily one right answer, and there are examples of each approach taken by different communities based on their own unique circumstances. Based on the prior work sessions with Council, it appears that the 2 general feeling would be to allow short term rentals with conditions, and the current proposed text takes that approach. Below is the proposed ordinance from the Planning Board and a discussion of the intent and purpose following each section. 27.20.095 Short Term Residential Rental Standards. A residential dwelling unit may be rented for a period shorter than thirty days provided that the following performance standards are met: (1) The property owner shall first obtain an administrative conditional use permit from the Planning Department (See Chapter 27.33). Administrative conditional use permits are provided for under the current city code. They involve sending out a notice to property owners within 150 feet for comment. If all the issues raised are adequately addressed, it can be issued without a public hearing and Council action. The permit is the key to allowing the City to ensure that the other provisions are met. The process allows for safety inspections that otherwise would not be done under current rules, provides the neighborhood an opportunity to be aware of the new use and comment on it, and helps ensure that other existing state requirements are met. Other options which could serve the same purpose that other communities use involve a business license procedure or a residential rental agreement. The city does not have either of these mechanisms in place at this time. (2) The number of units rented shall not exceed the allowable density for the zoning district where the property is located. This provision was included to ensure that a single-family zone would not have a house with multiple dwelling units, similar to a duplex or apartment building. For example, in an R-3 zone, a duplex is not allowed, so a short term rental could only involve the entire house, not half the house with another renter in the other half. Density in terms of the number of rentals in a given neighborhood will be discussed under a different heading. (3) The administrative conditional use permit review shall include: (a) Proof of an inspection by the Fire Department or its designee showing that all life safety requirements are met, including, but not limited to, smoke detectors and egress; Section (3)(a) requires a life safety inspection of the property to be rented. Such inspections are important in this context because the public is being invited into the residence for overnight accommodations, and there should be some assurance that basic life safety measures are in place. The Building Department would likely perform an inspection akin to ones already conducted for day cares, schools, residential care facilities, and similar uses. The inspection would focus on smoke detectors, carbon monoxide detectors, egress windows out of sleeping areas, handrails, hot water temperature (under 120 degrees to prevent scalding), exposed electrical wiring, and ground faults within six feet of sinks/tubs. (b) Proof of a State of Montana public accommodation license for a tourist home, which is administered by the Flathead City -County Health Department and is subiect to annual inspections; This requirement essentially already exists, but helps ensure that a short term rental property has complied with state law. Under the Rule for Public Accommodations (Title 37, Chapter 111, Subchapter 1 of the Administrative Rules of Montana), administered by the Montana Department of Health and Human Services, short term rentals are required to submit a public accommodations plan review form to the Flathead City -County Health Department. A good part of the review involves private water and wastewater systems and would not typically be an issue within the city limits, but the review also includes items such as solid waste, laundry facilities, cleaning, and maintenance. (c) Verification that the property is appropriately registered and meets requirements for state bed tax purposes; As with the public accommodation license, this requirement already exists, but its inclusion in the proposed ordinance is designed to help ensure that the appropriate taxes are being paid and that short term rentals are on a level playing field with hotels and other traditional lodgings. According to the Department of Revenue, the application process to get registered takes about three to five days. The applicant gets a certificate back that they could provide for verification. (d) The property owner shall provide their name and phone number or that of a local contact person that shall be responsible for handling any issues that arise with the property. The contact shall be available to address any issues 24 hours a day and seven days a week. (4) The property owner or local contact's name and phone number shall be posted on an emergency contact notice visible from outside the front door. Otherwise, there shall be no si2na2e indicating the short term rental of the property. Sections (3)(d) and (4) require that contact information be available as a way to address issues. The ability to contact the owner is an important part of the proposal. As presented in the webinar, built-in accountability by having a local contact is a key part of providing the neighbors an avenue to notify the owner of problems as they are happening without either escalating it immediately to a police matter or waiting until Monday to call into the City. Most of the complaints that staff has received regarding short term rentals has been noise, parties, cars, and other short term issues that have packed up and moved on after the weekend. The ability to directly contact the owner or a local representative that can respond on a 24 hour/7 days a week basis provides a safety valve for neighborhood issues when they arise rather than after the fact. E Some of the comments from current short term rental owners indicated a reluctance to provide that information, at least in terms of posting at the property. However, having the contact information in a file in the Planning Department does not help an aggrieved neighbor on a Saturday night. Posting that information is part of the process in many communities, but could be accomplished in other ways, such as directly giving the contact information to neighbors within 150 feet (those who would be receiving notices for the administrative conditional use permit) and updating the information as necessary. (5) Violations of the terms of the administrative conditional use permit or the provisions of this section may subject the property owner to enforcement pursuant to the terms of this ordinance. Noise and similar issues may be enforced through the Police Department. The final part of the amendment, Section (5), notes that violations of the terms of a permit or the ordinance may subject the property owner to enforcement as a zoning violation and that noise and similar issues may be enforced through the Police Department. Zoning violations are treated as civil infractions, and would be processed as any other violation. Other lccuPc In addition to issues directly addressed in the proposed ordinance, there were other issues raised at the last work session and in staff s research that may need to be discussed. Density Public comment and the council raised the option of using density as a controlling factor thus limiting the concentration of short term rentals in a block or a neighborhood. Some communities, such as Durango, Colorado, have density limitations. Cities with density limits tend to be those with a very large number of short term rentals in the jurisdiction. They typically use software to track where each short term rental is located, and then apply the density requirements to black out nearby properties that become ineligible for any new short term rental. Some have specific caps on the number of short term rentals within the city or area. In staff s research, the amount of short term rentals within Kalispell is not at the level where density is a significant concern. Durango and Aspen, for example, are limiting rentals to 50% of a block. Their concern was that the proliferation of short term rentals was changing the actual character of the community and adding to the out -migration of actual residents as the business had become so lucrative. Also, the added complexity of density rules, and the tracking of those properties, arguably creates a more difficult regulatory scheme for those looking to open a short term rental and a somewhat inequitable distribution system where one homeowner can do something that a next -door neighbor in the same zoning district could not do, based solely on the fact that the one operating the short term rental got in their application first. Where should short term rentals be allowed? A related issue is whether short term rentals should be allowed in some areas of the city, but not others. Every city likely has a different answer as to whether certain areas in town should not have short term rentals based on its unique characteristics. Some cities have natural areas where short term rentals would be more expected than others. The Planning Board discussed this aspect at its work session, and it is difficult to really separate the city into different areas in that way. For example, why would a short term rental be allowed in Northridge, but not Ashley Park, or vice versa? The Planning Board did not see any reasonable basis to go that route. What is the status of short term rentals in commercial areas? Another question at several of the work sessions has involved short term residential rentals in commercial areas. Short term rentals are legally permitted in those zones where hotels are allowed, since the use is similar. Staff had anticipated continuing that interpretation. However, in light of equity concerns raised by the Council between similarly situated property owners and upon further review, staff believes that requiring the same permit for short term rentals in commercial zones is appropriate. Not only does it put property owners on similar footing, but it also allows for the safeguards that the administrative conditional use permit provides, such as life safety inspections and the public accommodation license through the Health Department. Maximum occupancy per unit Establishing a maximum occupancy for each short term rental was also discussed at the last work session. Generally, a calculated maximum occupancy is not part of a single-family residential home, but the Building Department could apply a standard from the building code of one person per 200 gross square feet in the home. That standard could be incorporated into the ordinance as part of the life safety inspection. Each short term rental would then come with a maximum occupancy certification. Impact of short term rentals on affordable housing Another potential issue is housing affordability. As with density, research has shown that housing affordability issues are more pronounced with larger numbers of short term rentals and those with specific housing affordability programs in place. For example, Breckenridge, Colorado, had a population of 4540 people in 2010 with 6911 housing units. Only 28% of the units were occupied by residents and 4965 units were for short term rentals. The resulting crunch was part of the reason that the average sales price of a home was twice what was deemed to be affordable. Other communities have concerns about pulling a large number of homes off of the rental market with the resulting increase in rental costs from supply and demand. The number within Kalispell (approximately 35 on the VRBO site) would not have a significant impact on housing affordability, and it is not anticipated that there would be a substantial increase in those numbers to a point where it would have that effect. One-time permit or annual license 0 One item that was touched on previously was whether the permit for a short term rental should be a one-time permit when the use starts, or should be an annual permit. On one hand, zoning permits are generally issued prior to construction or the beginning of a new use and set conditions for continued use, without annual renewals. Any conditions that are not met while in operation are handled as civil infractions, like any zoning ordinance violation. On the other hand, annual renewals could help to keep the life -safety inspection, verification of health department and bed tax registrations and contact information up to date. This could be beneficial and help protect the public staying at the home. If this were the case, an annual renewal fee would be necessary to help pay for tracking software and other costs. Communities approach this issue differently, and it really comes down to which direction the Council wants to go. How will we track new short term rentals? Finally, as has been previously noted, short term rentals are notoriously difficult to track. On a drive -by conducted by staff on a Thursday afternoon, it was noted that a short term rental looks like any other house. The vast majority of operators use VRBO or Airbnb as a host site to advertise. However, there are over 100 sites that people do use so just checking one or two on a regular basis would miss a lot. There are new services being provided to help track short term rentals through web -based programs that search the web for information. These services provide a range of offerings, from monthly reports of rentals in the city to automatic letters to unlicensed rentals to a full-blown 24/7 hotline for neighbors to call to report problems. The two services staff has researched are Bear Cloud STR and Host Compliance. Bear Cloud is in an early phase of its development. The developer is a mayor in a town in Utah with a background in technology and is putting together the program with an eye towards state wide utilization. Staff is in the process of scheduling some demonstrations with Bear Cloud STR. The current cost estimate would be $2000 - $4000 per year depending upon customization needs. Host Compliance is more established and is in relatively wide -spread use. Their basic rate for monthly reports showing short term rentals in a community is $380 per year with a stepped fee schedule for other services. Depending upon the number of rentals, the services and fees could increase to $1,500/yr. for address identification, $2,250/yr. for compliance monitoring, $3,250 for tax collection support, and $3,850 if the city were to add a 24/7 hotline. Some level of service would likely be necessary to effectively handle the monitoring of existing and new short term rentals. Conclusions: The Kalispell Planning Board has submitted a suggested draft ordinance. The council, if they proceed with the ordinance should consider: a) Applying the ordinance to all short term residential units including those in commercial zones. b) Adding a maximum occupancy standard for a unit based on the square footage of each unit determined at the time of fire inspection. c) Determining if a one-time permit is appropriate or if an annual renewal is in order. d) Directing staff to proceed with a monitoring software package that is within budget to fit the city's needs. Hopefully, the additional research and information provided by staff will prove helpful. Staff believes that the proposal forwarded by the Planning Board with suggested modifications effectively addresses the primary issues related to short term rentals in Kalispell in a reasonable manner that balances neighborhood interests with those renting their homes. At this point, staff is looking for direction from the Council and would suggest bringing the proposal forward to a regular Council meeting for formal consideration. ATTACHMENTS: Draft short term rental ordinance (Planning Board Recommendation). Updated proposed staff report Report compiled: June 17, 2016 c: Aimee Brunckhorst, Kalispell City Clerk DRAFT SHORT TERM RENTAL ORDINANCE Recommended by Kalispell Planning Board As an amendment to the Kalispell Zoning Ordinance 27.20.095 Short Term Residential Rental Standards. A residential dwelling unit may be rented for a period shorter than thirty days provided that the following performance standards are met: (1) The property owner shall first obtain an administrative conditional use permit from the Planning Department (See Chapter 27.33). (2) The number of units rented shall not exceed the allowable density for the zoning district where the property is located. (3) The administrative conditional use permit review shall include: (a) Proof of an inspection by the Fire Department or its designee showing that all life safety requirements are met, including, but not limited to, smoke detectors and egress; (b) Proof of a State of Montana public accommodation license for a tourist home, which is administered by the Flathead City -County Health Department and is subject to annual inspections; (c) Verification that the property is appropriately registered and meets requirements for state bed tax purposes; and (d) The property owner shall provide their name and phone number or that of a local contact person that shall be responsible for handling any issues that arise with the property. The contact shall be available to address any issues 24 hours a day and seven days a week. (4) The property owner or local contact's name and phone number shall be posted on an emergency contact notice visible from outside the front door. Otherwise, there shall be no signau indicating the short term rental of the property. (5) Violations of the terms of the administrative conditional use permit or the provisions of this section may subject the property owner to enforcement pursuant to the terms of this ordinance. Noise and similar issues may be enforced through the Police Department. 27.37.010: Definitions. (1-5460) Residential. Regularly used by its occupants as a permanent place of abode, which is made one's home as opposed to one's place of business and which has housekeeping and cooking facilities for its occupants only. In situations where a dwelling is rented or leased, a residential use would involve lease periods of one month or more unless the provisions of Section 27.20.095 relating to short term residential rental standards are met. 10 CITY OF KALISPELL — ZONING REGULATIONS KALISPELL PLANNING DEPARTMENT STAFF REPORT #KZTA-16-03 May 4, 2016 This report is a proposed updated staff report and findings of fact for the proposed amendment related to short term residential rentals. The report has been prepared for the Council's consideration as an alternative set of findings to replace the findings and recommendation approved by the Kalispell Planning Board on April 12, 2016. A series of amendments, which included short term rentals, had been reviewed by the Kalispell Planning Board at a work session held by the Board on March 8, 2016. At that time one member of the public did speak in support of allowing short term residential rentals in the community. Following this work session the Board held a public hearing on April 12, 2016. A recommendation was forwarded to the city council to adopt a slate of amendments. The Council did hold a work session on the entire slate of 15 amendments and then met on Monday, May 2, 2016 for hearing and action. At that meeting, the amendment addressing short term residential rentals was removed from the slate of amendments and sent back to a Council work session for additional review. BACKGROUND INFORMATION As part of a continuing effort to make the zoning ordinance up-to-date and current, staff compiled a short list of minor amendments to the ordinance specifically including how to address the use of short term residential rentals in Kalispell. A full text of the draft language relating to short term rentals is attached to this report. A. Petitioner: City of Kalispell P.O. Box 1997 Kalispell, MT 59903 (406) 758-7940 B. Area Effected by the Proposed Changes: Any residential property within the jurisdictional boundaries of the City of Kalispell may be affected by the proposed changes. C. Proposed Amendment: The changes to the current text of the code section are indicated below. Deletions are struck -out and additions are underlined. 27.20.095 Short Term Residential Rental Standards. A residential dwelling unit may be rented for a period shorter than thirty days provided that the following performance standards are met: Page 1 of 5 (1) The property owner shall first obtain an administrative conditional use permit from the Planning Department (See Chapter 27.33). (2) The number of units rented shall not exceed the allowable density for the zoning district where the property is located. (3) The administrative conditional use permit review shall include: (a) Proof of an inspection by the Fire Department or its designee showing that all life safety requirements are met, including, but not limited to, smoke detectors and egress; (b) Proof of a State of Montana public accommodation license for a tourist home, which is administered by the Flathead City -County Health Department and is subject to annual inspections; (c) Verification that the property is appropriately registered and meets requirements for state bed tax purposes; and (d) The property owner shall provide their name and phone number or of a local contact person that shall be responsible for handling any issues that arise with the property. The contact shall be available to address any issues 24 hours a day and seven days a week. (4) The property owner or local contact's name and phone number shall be posted on an emergency contact notice visible from outside the front door. Otherwise, there shall be no signage indicating the short term rental of the property. (5) Violations of the terms of the administrative conditional use permit or the provisions of this section may subject the property owner to an enforcement pursuant to the terms of this ordinance. Noise and similar issues may be enforced through the Police Department. 27.37.010: Definitions. (1-5-960) Residential. Regularly used by its occupants as a permanent place of abode, which is made one's home as opposed to one's place of business and which has housekeeping and cooking facilities for its occupants only. In situations where a dwelling is rented or leased, a residential use would involve lease periods of one month or more unless the provisions of Section 27.20.095 relating to short term residential rental standards are met. Page 2 of 5 D. Staff Discussion: The zoning ordinance defines "residential" to include rental periods of one month or more. Periods of time less than one month are either hotels or bed and breakfasts. The Planning Office usually receives about 3 or 4 complaints each year about VRBOs from neighbors (constant streams of people/frequent vacation parties, excessive garbage in the dumpsters), while at the same time has observed an increase in popularity by tourists throughout the country as well as homeowners that can generate substantial income through the program. Based on a staff survey of prominent web sites (VRBO, Air B&B, Craigslist, etc) there appears to be 30 — 40 such uses throughout the City of Kalispell. The numbers typically fluctuate with the seasons with the months of June, July and August as significantly higher use months. There are some concerns that these uses, while they do provide a benefit to the community, need to pay their share of the state bed tax and that they need to safe and well managed as well. At the planning board work session, the Board indicated that such uses could be acceptable in residential areas, but only subject to appropriate conditions that would ensure the units were safe, well managed and that they paid their fair share of the state bed tax. The Board also discussed whether short term rentals should be limited to certain areas of the city. It felt that, in part because we are not a resort community and in part due to a lack of any major distinction between neighborhoods in the City that would justify allowing such rentals in some areas, but not others, we should allow short term rentals on an equal basis anywhere that residential uses are allowed. In regard to the specific conditions, the Board felt that (1) fire and life safety inspections are important to protect the guests at the rentals; (2) compliance with all registration and licensing necessary to ensure that the appropriate bed taxes are paid in order to keep these rentals on an equal basis with hotels and other businesses which pay the tax; and (3) providing a way for neighbors to contact the owner when problems arise. Those concerns are provided for in the proposed text. Staff contacted other communities in the area, including Whitefish which just completed a lengthy study of the issue as well as resort communities in our greater area. Based on Board discussion, staff drafted an ordinance that would allow those types of rentals with an administrative conditional use permit. Under an administrative conditional use permit, all neighbors within 150 would be notified and offered an opportunity to comment. If comments could be addressed, the permit could proceed. If there was neighborhood objection that could not be addressed by staff or conditions, the full conditional use permit process would then be triggered. Conditions would include fire department and health department sign -offs, compliance with bed tax regulations, and providing contact information to the city as well as posting the information at the property. EVALUATION BASED ON STATUTORY CRITERIA The statutory basis for reviewing a change in zoning is set forth by 76-2-303, M.C.A. Findings of Fact for the zone change request are discussed relative to the itemized criteria described by 76- 2-304, M.C.A. Page 3 of 5 2 3 5 0 7 0 Is the zoning regulation made in accordance with the growth polio The proposals are consistent with the growth policy. Does the zoning regulation consider the effect on motorized and non -motorized transportation systems? The proposed amendments have a minimal effect on transportation systems. Is the zoning regulation designed to secure safety from fire and other dangers? The proposed amendments add more clarity which allows for a better implementation of standards designed to protect the public from fire and other dangers. Is the zoning regulation designed to promote public health, public safety, and the general welfare? The general health, safety, and welfare of the public will be promoted by creating a more predictable, orderly, and consistent environment. Does the zoning regulation consider the reasonable provision of adequate light and air? The standards help provide for appropriate interaction between developed properties. Is the zoning regulation designed to facilitate the adequate provision of transportation, water, sewerage, schools, parks, and other public requirements? As mentioned above, the zoning ordinance creates a more predictable, orderly, and consistent development pattern. That pattern allows for a more efficient allocation of public resources and better provision of public services. Does the zoning regulation consider the character of the district and its peculiar suitability for particular uses? The amendments reflect the character of each district. Does the zoning regulation consider conserving the value of buildings? Building values will be conserved by providing reasonable standards within zoning districts by encouraging predictable, orderly, and consistent development within a given area. Does the zoning regulation encourage the most appropriate use of land throughout the municipality? The amendments help create consistency throughout comparable zones, which promotes Page 4 of 5 compatible urban growth. RECOMMENDATION Staff recommends that the Kalispell City Council adopt the findings in staff report KZTA-16-03 and adopt the proposed amendment as provided herein. Page 5 of 5 201 1" Avenue East PO Box 1997 Kalispell, MT 59903 Phone: 406-758-7720 Fax: 406-758-7831 www.kalispell.com /public works TO: Doug Russell, City Manager; Charlie Harball, City Attorney FROM: Susie Turner, P.E., Public Works Director SUBJECT: Request for Sewer Treatment from a Property Owner Outside of the Evergreen Sewer District MEETING DATE: June 27, 2016 At the May 9, 2016, work session information was presented regarding a request for sewer treatment service via conveyance through the Evergreen District sewer system from Ms. Carol Fontaine. Ms. Fontaine's 17.2 acres, located at 135 West Reserve Drive, is outside, but adjacent to, the Service Area as defined in the July, 2015, Sanitary Sewer Treatment Agreement between the Evergreen District and the City. Below are responses to Council inquiries and additional background information in response to the May work session. Boundaries: There are three boundaries associated with the Evergreen Water and Sewer District. The first is the Evergreen Water and Sewer District boundary that includes the public water supply formed in 1964, and the sewage collection system installed in the early 1990's. The Evergreen Water and Sewer District is governed through a Board and the District's boundary is subject to change based on Board's policy and ability to "annex" properties into the District. The second is the RSID boundary, which was developed around 1990 as a means to fund improvements necessary to the sewer system, and enable the District to collect and pump waste water to the Kalispell Wastewater Treatment Plant. The District's sewer improvement project was funded through an EPA grant and the RSID. The RSID boundary was formed by the District with collaboration of property owners who agreed to be a part of the sewer improvement project. The RSID bond was officially closed out in 2012. The third boundary is the Service Area as defined in the Sanitary Sewer Treatment Agreement between Evergreen District and the City. The original Agreement was created in 1990, and the Evergreen District Service Area created was identical to the RSID boundary. The Service Area was updated and expanded as a part of the 2015, Sanitary Sewer Treatment Agreement. Exhibit A provides a layout of each boundary to date. Evergreen District: The Evergreen District sewer collection system was designed for an equivalent population of 6,473 people, which projects to 433,700 gallons per day (gpd). Currently, Evergreen's average daily flows are around 400,000 gpd. Information regarding Evergreen growth projections and system limitations are provided in Exhibit C. Service Area: The Service Area as defined in the 2015 Agreement obligates the City to accept normal municipal sewage from the District as shown in the defined area. The volume rate from 1IPage the District associated with the defined area shall not exceed 782,000 gpd, and consent is required by City Council, or a designee, prior to connection to the District for owners of property outside of the defined Service Area. At this time only Trumbull Creek Phase 2 lots are provided treatment service and are located outside of the defined 2015 Service Area. Options: Council has several options when considering this request for sewer treatment service outside of the defined Service Area. Option 1: Approve the request to provide sewer treatment service for Ms. Fontaine's property, per the current Agreement. The flows associated with Ms. Fontaine's property would not be considered part of the Evergreen District not to exceed volume rate (782,000 gpd) average daily flows. Ms. Fontaine would be required to waive the right to protest annexation, provide consent to withdraw from the rural fire district, enter into a development and/or pre-treatment agreement with the City of Kalispell, meet pre-treatment regulations, and pay the treatment plant impact fee. Option 2: Collaborate with the Evergreen District and change the Service Area boundary in the Agreement to include Ms. Fontaine's property. Both the City and the District would have to agree and adopt an amendment to the Sanitary Sewer Treatment Agreement. The flows generated from the property would be included as part of the 782,000 gpd not to exceed volume rate. At the June 15, Evergreen District Board meeting, this option was discussed and the Board would be willing to proceed with the change in Service Area and subsequent Agreement amendment. Option 3: Collaborate with the Evergreen District and change the Service Area boundary in the Agreement to include Ms. Fontaine's property and properties to the west, up to the Whitefish River (see Exhibit A). Both the City and the District would have to agree and adopt an amendment to the Sanitary Sewer Treatment Agreement. The flows generated from the properties would be included as part of the 782,000 gpd not to exceed volume rate. At the June 15, Evergreen District Board meeting, this option was discussed and the Board would be willing to proceed with the change in Service Area and subsequent Agreement amendment. Option 4: Deny the request to provide sewer treatment service for Ms. Fontaine's property, per the current agreement. Ms. Fontaine would have to proceed with an alternative option to replace her septic system per County Regulations. Upon review, Staff will move forward with the tasks associated with the option chosen by Council or an alternative per Council direction. ATTACHMENTS: Exhibit A: Boundary Map Exhibit B: Evergreen Population, Growth Projections and Sewer System Limitations May 9, 2016, Work Session Background Information March 21, 2016, request letter from Carol Fontaine 2 1 P a g e Exhibit A: Boundary Map Evergreen Water and Sewer District Boundaries Legend Service Ext. Proposal 2015 Sewer Service Area WAS District Boundary Original RSID Evergreen VVater Evergreen Sewer 3 1 P a g e PURLIC WORK r_ m in 1 Exhibit B: Evergreen Population, Growth Projections, and Sewer System Limitations Growth Projections and Populations within Evergreen: Year Annual Growth Rate Total Equivalent ERUs' Projected ERUs Developed per period Persons per house Total Projected Equivalent Population Total Projected Flow GPD2 20151 2,123.54 2.806 5,959 399,225 2020 2% 2,345 221 2.806 6,579 440,777 2025 2% 2,589 244 2.806 7,264 486,653 2030 2% 2,858 269 2.806 8,020 537,304 2035 2% 3,155 297 2.806 8,854 593,227 2040 2% 3,484 1 328 1 2.806 9,776 654,971 2045 2% 3,846 363 2.806 10,793 723,141 2049 2% 4,164 317 2.806 1 11,683 782,751 1. Starting point for analysis is 2015 and is based upon average annual flow for calendar year 2015 at 399,225 gpd, 67 gpcd, 188 gpd/ERU and 2.0806 persons/ERU. (399,225/188 = 2,123.5 ERUs equivalent) 2. Ending point for projections is the ceiling on flow per new sewer agreement between Evergreen Sewer & Kalispell of 782,000 gpd. 3. ERU=Equivalent Residential Unit 4. Based on information from Sewage Treatment in the Flathead Basin Report by Carver Engineering. Sewer Svstem Limitations: The following facts are referenced from the Sewage Treatment in the 2014 Flathead Basin Report by Carver Engineering. Additional information and limitations for the Evergreen District are further described in the report. • Additional future growth in Evergreen is possible on the remaining vacant property or on currently underutilized parcels. The Evergreen sewer system was designed for an equivalent population of 6,473 which projects for an average daily flow of 433,700 gallons per day. • The Evergreen sewage collection system has a total of 25 lift stations. The Main Lift Station for Evergreen is located south of Snappy Sport Senter, and pumps sewage through 5 miles of force main to the Kalispell Waste Water Treatment Plant. The estimated ERUs limit is 3,640 for the Main Station (see table below). Capacity Limit Limit # Name (gpm) Max No. ERUs Max Population Max Flow 19 Main Station -1,400 3,640 7,573 684,320 • Additional improvements and upsizing would be required to the Evergreen District sewer system, especially near the boundary limits, to utilize the max pumping capacity of the Main Station. 4 1 P a g e --9 Kalispell Public Works Department _-air,101 11 Ave E_ Kalispell, MT ed Pu#iic Forks Departmi1 iKalispell.com ID: Doug Russell, City Manager FROM. Susie Turner, P.E., Public Forks Director S-UBJEC:I: Request for Sewer Treatment from Property Owner Outside of the Evergreen Sewer District located at 135 West Reserve Drive MEETING DATE: March 22, 2016 Carol Fontaine is requesting consent from the City of Kalispell for sewer treatment services via conveyance through the Evergreen District sewer system. The property is located at 135 West Reserve Drive and is adjacent to Evergreen District's designated service area (see Exhibit A). The parcel is 17.2 acres with two residential structures proposed for connection; a two bedroom, two bathroom, and a one bedroom. one bathroom (see Exhibit B). This request was prompted by a failing septic system. Ms. Fontaine's March 21, 2016 request letter is attached. In accordance with the July 2015_ Sanitary Sewer Treatment Agreement - Section 3.04 between Kalispell and Evergreen District, consent is required by City Coimcil, or designee, prior to connection. Kalispell has the right to decline the application for any reason_ but if approved Ms. Fontaine will be required to waive the right to protest annexation, provide consent to withdraw from the rural fire district, enter into a development and or pretreatment agreement with the cin of Kalispell., meet pretreatment regulations, and pay the treatment plant impact fee. Evergreen is allotted 0.782 million gallons average daily flow for the area within the Evergreen service boundary. Currently Evergreen's average daily flows are 0.40 million gallons per day. The flows associated with Ms. Fontaine's property will not be considered part of Evergreens not to exceed volume rate (0.782. mullion gallons) average daily flaws. The Kalispell's treatment plant is designed to treat 5.4 million gallons per day ( GD) of wastewater and is currently treating on average 2.5 to 2.8 MGD. At this time the treatment capacity is capable to treat the additional flows of two residential stmichires. Upon Council review and direction, Ms. Fontaine will be contacted with the schedule to present the information to City Counc it at a regular meeting or work session. AITACHNITNIS: Exhibit A: Evergreen District Map Exhibit B: Aerial of property March ? 1, 2016 request letter from Carol Fontaine 5 1 P a g e g I 6�Page EXHIBIT B 7 1 P a g e Carol Fontaine 135 W_ Reserve Drive Kalispell, MT 59901 106 752.2938 March 21.2016 susie'r. urner, Director Kalispell Public Works Kalispell, MT Hear Ms. Turner: 1 live at 135 W. Reserve brave. I have a two bedroom, two bathroom house and a one bedroom, one bathroom guest house on 17.2 acres. My property is bordering the Evergreen Sewer district. I already receive Evergreen water. The legal description for the property is S29, T29N, R 2 1 W. 17.67, TR 281N E25E4 EX N'1.Y STRIP, ASSRN0000381475, My septic system is failing and I very much would like to hook into the Evergreen sewer system. Evergreen sewer employees said 1 needed permission from Kalispell Public Works to hook Into their system before they Could approve and begin work. I am formally requesting approval to hook i[Ito the Evergreen Sewer system. I am aware there is a fee to do su and afn prepared to pay it. Thank you for your time and consideration. Siinncerely, L 0 - t t4 .L•rL -A Carol rontaine 8�Page 201 1" Avenue East PO Box 1997 Kalispell, MT 59903 Phone: 406-758-7720 Fax: 406-758-7831 www.kalispell.com /public works TO: Doug Russell, City Manager, Charlie Harball, City Attorney FROM: Susie Turner, P.E., Public Works Director SUBJECT: Water and Wastewater Facility Plan Update -South Kalispell Development MEETING DATE: June 27, 2016 With the increasing potential for new development in South Kalispell, Public Works procured KLJ Engineering to develop a comprehensive Water and Wastewater Facility Plan for the South Kalispell area. The South Kalispell Facility Plan Update is a supplement to the adopted 2008 Water and Wastewater Facility Plan. The Plans objective is to identify and plan for water and sewer system needs to service existing and new development within the City's annexation boundaries. This update will aid new development and the City in planning for utility extensions in the south corridors of Kalispell using smart growth principles. Smart growth principles direct investment in future utility systems to areas where investments will achieve the greatest benefit to the largest number of residents and businesses. Smart growth principles also allow utilities to provide well -designed and economically efficient systems of potable water and sanitary sewer service that maximize the use of existing facilities to meet the needs of a growing population, while adhering to local and state regulation and protecting the natural environment. During the work session, staff will review the basis for planning and recommended utility infrastructure to service the South Kalispell area as described in the attached final draft of the Water and Wastewater Facility Plan Update -South Kalispell Development. ATTACHMENTS: Final Draft Water and Wastewater Facility Plan Update -South Kalispell Development Water Et Wastewater Facility Plan Update South Kalispell Development Supplement to: Water Facility Plan Wastewater Facility Plan April, 2016 FINAL DRAFT <<KLI Chapter 1 - Basis of Planning........................................................................................ 1 1.1 Introduction..................................................................................................... 1 1.2 Study Area....................................................................................................... 1 1.3 Population....................................................................................................... 3 1.3.1 Future Population Projections........................................................................... 3 1.4 Projected Water System Demand........................................................................... 4 1.4.1 Introduction................................................................................................. 4 1.4.2 Future Demand Forecast..................................................................................4 1.5 Projected Sewer System Flow................................................................................ 5 1.5.1 Introduction................................................................................................. 5 1.5.2 Future Flow Forecast...................................................................................... 5 Chapter 2 - Water Distribution...................................................................................... 6 2.1 Introduction..................................................................................................... 6 2.2 Future Water Distribution Analysis.......................................................................... 6 2.2.1 Distribution System Modeling Assumptions............................................................ 6 2.2.2 Modeling Software......................................................................................... 6 2.2.3 Modeling Results............................................................................................7 2.2.4 Water Main Extension Evaluation........................................................................ 7 2.2.4.1 Scenario 1............................................................................................. 7 2.2.4.2 Scenario 2............................................................................................. 9 2.2.4.3 Alternative Sizing Considerations............................................................... 10 2.2.5 Conclusions................................................................................................ 13 2.2.5.1 Future Recommendation.......................................................................... 14 Chapter 3 - Wastewater Collection................................................................................15 3.1 Introduction................................................................................................... 15 3.2 Sewer Collection System Summary........................................................................ 15 3.3 Future Sewer Flow Analysis................................................................................. 19 3.3.1 Collection System Evaluation Criteria................................................................ 19 3.3.2 Sewer Main Extension Evaluation...................................................................... 19 3.3.2.1 West Sewer Service Area......................................................................... 19 3.3.2.2 East Sewer Service Area.......................................................................... 22 3.3.3 Conclusions................................................................................................ 24 3.3.3.1 Future Recommendations........................................................................ 24 City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 Figures Figure1.2-1: Study Area................................................................................................ 2 Figure 2.2-1: Water Modeling Main Sizing............................................................................ 8 Figure 2.2-2: Proposed Water Mains................................................................................ 12 Figure 3.2-1: Proposed West Sewer Service Areas................................................................ 17 Figure 3.2-2: Proposed East Sewer Service Areas................................................................. 18 Figure 3.3-1: West Service Area Sewer Main Locations.......................................................... 21 Figure 3.3-2: East Service Area Sewer Main Locations........................................................... 23 Tab les Table 1.3-1: South Kalispell Residential Population Projection ................................................. 3 Table 1.3-2: South Kalispell Existing Business Water Useage Sample ........................................... 3 Table 1.3-3: South Kalispell Business Population Projection.....................................................4 Table 1.3-4: Projected South Kalispell Populations................................................................ 4 Table 1.5-1: Summary of Sanitary Sewer Flow...................................................................... 5 Table 2.2-1: Scenario 1 Modeling Results............................................................................ 9 Table 2.2-2: Scenario 2 Modeling Results.......................................................................... 10 Table 2.2-3: Scenario 2 12-Inch Main Sizing Recommendation................................................. 13 Table 3.1-1: Summary of Sanitary Sewer Flow.................................................................... 15 Table 3.2-1: Summary of Service Area Population............................................................... 16 Table 3.3-1: West Service Area Hydraulic Summary............................................................. 19 Table 3.3-2: Summary of West Sewer Main Sizing................................................................ 20 Table 3.3-3: East Service Area Hydraulic Summary.............................................................. 22 Table 3.3-4: Summary of East Sewer Main Sizing................................................................. 22 Appendices Appendix A: Existing Water Usage Data Appendix B: Kalispell Fire Chief Correspondence City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 Chapter 1 - BASIS OF PLANNING 1.1 Introduction The purpose of this report is to serve as a supplement to the 2008 City of Kalispell Water and Wastewater Facility Plan Update documents prepared by HDR Engineering, Inc. It is not intended to be an all-inclusive document for the entire City but will focus on South Kalispell. The planning area developed in the 2008 documents has been re-evaluated to incorporate the 2011 Growth Policy Update. As such, this document will analyze potential growth, estimate water and sewer demands, and develop anticipated water production and distribution systems and sanitary conveyance systems for the South Kalispell planning area. The analysis will include placement and sizing recommendations for future infrastructure in the currently adopted growth annexation policy using engineering methods that follow local and state standards. This analysis does not include an investigation of the Kalispell Wastewater Treatment Plant. 1.2 Study Area In 2008, the study area developed in the Facility Plan Update (Figure 1-6 Study Area) extended south along US Highway 93 (US-93) to US Highway 82 (US-82). This area was modified to coincide with the council's direction on growth. The much smaller area analyzed in this report is bound by Cemetery Road and Lower Valley Road to the north, Rocky Cliff Drive to the south, Flathead River to the east and Ashley Creek to the west. Much of the area between US-93 and the Flathead River is located within a defined floodplain, further narrowing the practical study area to Lower Valley Road to the east. Although the Growth Policy Planning Area extends west to Airport Road, the City of Kalispell Planning Department thought it unlikely that areas west of Ashley Creek would be annexed into the City. Parcels located within the 100-year floodplain will be considered undevelopable for purposes of this report. Figure 1.2-1 depicts the study area which is hereafter referred to as South Kalispell. The total planning area encompasses 1,800 acres, of which approximately 500 acres are located within the 100-year floodplain and 40 acres owned by the City is utilized for biosolids disposal and is not developable. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 — 100 YEAR FLOOD BOUNDARY GROWTH POLICY PLANNING AREA ANNEXATION POLICY BOUNDARY STUDY AREA KLI FITCITY OF KALISPELL WATER & SEWER FACILITY PLAN UPDATE \\V iT EFATE. oaaos CI(]I LL7C 1 9_1 n ,zo,a-316p.-P,ciTEsayar�o.�ainsasoos�o.peuoe.ebne e�.q�Temm�iservme.m,_w�oesemos_E,mbl-1z1—yA,-d.g(F,g--1) 1.3 Population In order to quantify the demands on the water system and loads on the sanitary sewer system, the future South Kalispell population to be served by development was estimated. The City of Kalispell Planning Department was consulted to help define population densities, anticipated growth rates and provide expertise regarding potential future development. Population projections were determined by land use density corresponding to the proposed 2030 Growth Policy and not by growth percentages. As a result, the projections yield a total population for developed South Kalispell. 1.3.1 Future Population Projections There are six land use designations in the planning area consisting of commercial, urban mixed use, city facility, urban residential, suburban residential and industrial. The total population will be driven largely by residential development as the commercial, mixed use and industrial areas will likely be low -volume users. The City of Kalispell anticipates urban residential and suburban residential areas will have population densities of approximately 10 units/acre and 4 units/acre, respectively. Table 1.3-1 summarizes the total number of Equivalent Residential Units (ERUs) anticipated for these land use areas based on the total acreage within the planning area. Table 1.3-1: South Kalispell Residential Population Projection Population Area In South Anticipated Land Use Density' Kalispell2 ERU Population (ERU/Acre) (Acres) (People) Urban Residential 10 160 1,600 4,000 Suburban Residential 4 583 2,332 5,830 Total 5.3 743 3,932 9,830 1) One ERU is defined as 2.5 people. 2) Calculations exclude those areas located within the 100-year floodplain. The urban mixed use, commercial and industrial areas are anticipated to be developed similarly to existing land uses, which include large-scale dealerships/businesses with spread out infrastructure and low usage densities. Existing businesses were analyzed to determine an approximate population density for the type of land use. These estimates were determined based on past water usage, land acreage and Montana Department of Environmental Quality typical flows. Table 1.3-2 provides a summary of the density determination for these three land uses. The raw data used to determine these values is provided in Appendix A and represents a one year period in 2014-2015. Table 1.3-2: South Kalispell Existing Business Water Useage Sample Land Use Water Usage Area Usage Density (gpd) (acre) (gpd/acre) Small Commercial 1826 1.27 1438 Large Commercial 1642 8.79 187 Small Mixed Use 1749 2.59 675 Large Mixed Use 250 7.94 31 Large Industrial 353 10.60 33 Small Industrial 63 1.61 39 Total 5883 32.8 179 According to the analysis completed by HDR in the 2008 Water Facility Plan Update, the City of Kalispell uses approximately 184 gallons of water per capita per day (Section 1.6.2.4, p.1-20). Based on the above analysis, the combined population density for these three zoning categories is 0.39 ERU per acre assuming 460 gpd/ERU (2.5 people per ERU @ 184 gpd per person). Commercial developments may see a higher population given these businesses are more likely to be service oriented companies (gas stations, hotels, City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 etc.). However, the large-scale, extended dealerships drastically decrease the population density. Table 1.3-3 provides a summary of the business land -use areas and the expected service population. Table 1.3-3: South Kalispell Business Population Projection Land Use Population Area In South Anticipated (# of Parcels) Density' Kalispell2 ERU Population (ERU/Acre) (Acres) (People) Commercial (19) 0.39 46 18 45 Mixed Use (27) 0.39 281 110 275 Industrial (51) 0.39 211 82 205 Total (97) 0.39 538 210 525 1) One ERU is defined as 2.5 people. 2) Calculations exclude those areas located within the 100-year floodplain. Table 1.3-4 provides a summary of the population projection for South Kalispell. Table 1.3-4: Projected South Kalispell Populations Population Area In South Anticipated Land Use Density' Kalispell2 ERU Population (ERU/Acre) (Acres) (People) Urban Residential 10 160 1,600 4,000 Suburban Residential 4 583 2,332 5,830 Commercial 0.39 46 18 45 Mixed Use 0.39 281 110 275 Industrial 0.39 211 82 205 Total 0.39 1,281 4,142 10,355 1) One ERU is defined as 2.5 people. 2) Calculations exclude those areas located within the 100-year floodplain. 1.4 Projected Water System Demand 1.4.1 Introduction This section will use the population projections developed in the previous section to estimate the future water demand for the planning area. Although a significant portion of the South Kalispell area has already been developed, very few properties are served by the City's water system. 1.4.2 Future Demand Forecast The future demand within the study area is dependent on the population growth and the types of establishments that develop in the commercial, industrial and mixed -use areas. The future demand forecast will be used to develop the design criteria for new infrastructure to serve South Kalispell. Based on the population projections (10,355 people), the average daily water demand for the South Kalispell area is 1.90 MGD, which includes domestic and irrigated use. Applying a peaking factor of 2.67 established in the 2008 Facility Plan Update, the peak hourly demand is anticipated to be 3,540 gpm. This represents the demand once the area is fully developed; variations will occur as residential areas are populated, business are constructed and the current population connects to the system. The Kalispell Fire Department provided input regarding fire demand flows, which will ultimately drive the main sizing. Fire flow demand in residential areas is 1,500 gallons per minute (gpm) and increases to 4,000 gpm in the commercial, industrial and mixed -use areas. The determination of fire flows is not a precise calculation and evaluates building size, building type (material), etc. in accordance with the International Fire Code. Therefore, these values should be considered for planning only and individual developments analyzed independently. According to the Fire Chief, there are no existing areas within Kalispell that require fire flows in excess of 4,000 gpm; therefore, since there are no atypical developments currently planned for South Kalispell, these estimates are assumed to be sufficient. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 4 1.5 Projected Sewer System Flow 1.5.1 Introduction Similar to the previous projected water system demand, this section will use the population projections, by land -use densities corresponding to the 2030 Growth Policy, to estimate the sewer flow for South Kalispell. There is an existing sewer main extending from the Four Corners Lift Station south to the US- 93/Rocky Cliff Drive Intersection parallel to US-93 on the east side. 1.5.2 Future Flow Forecast Unlike the water demand, the future sewer flow forecast excludes any flow generated via irrigation or fire flow. The average daily flow per equivalent residential unit (ERU) for Kalispell is 265 gallons per day per the March 2008 Wastewater Facility Plan with a peak hour flow of 3.05 gallons per ERU. Having converted the commercial, industrial and mixed use population converted into residential populations (see Table 1.3-3), the anticipated number of ERUs to be sewered in the South Kalispell study area is 4,142 (see Table 1.3-4). Therefore, the average daily flow is 1.1 MGD. Applying the 3.05 peaking factor per ERU to the average daily flow, the peak hourly flow is estimated to be approximately 3.4 MGD, or 2,330 gpm. STUDY AREA POPULATION 10,355 Table 1.5-1: Summary of Sanitary Sewer Flow STUDY AREA ERU 4,142 City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 AVERAGE DAILY FLOW PEAK HOURLY FLOW (MGD) (GPM) 3.4 2,330 Chapter 2 - WATER DISTRIBUTION 2.1 Introduction This Chapter utilizes the information presented in Chapter 1 to analyze the future water demand and appropriately size distribution mains to serve the domestic and fire flow needs of the South Kalispell area. The purpose of the water modeling efforts was to determine the water main sizes that should be installed in the South Kalispell Study Area. The modeling was restricted to the existing distribution system, plus the proposed mains identified in Figure 2.2-1. The proposed additions would provide additional looping south of Cemetery Road, which would facilitate future growth in the area and provide for increased fire flow volumes. 2.2 Future Water Distribution Analysis 2.2.1 Distribution System Modeling Assumptions The computer modeling of the South Kalispell distribution system used or incorporated the following assumptions: ■ The configuration of the existing distribution system, current modeling demands, and several other operational parameters associated with the existing system function as depicted in the existing water system model provided by the City. ■ The configuration of the proposed water mains are as depicted in Figure 2.2-1. All elevations associated with the new mains were determined from the existing 2006 City of Kalispell Montana State Plane LiDAR survey data. ■ Fire flow goals were 4,000 gpm for commercial, industrial and mixed use areas and 1,500 gpm for residential areas. ■ The analysis focused on the sizing of the proposed water mains only. No detailed consideration was given to additional booster pumps, pressure zones, storage tanks, main replacements, or other facilities added to facilitate fire flows within the evaluation area. ■ The initial water level within the storage reservoirs was 1-foot above the minimum operating elevation (the bottom of the tank) on Scenario 1. This means the system wells will be "on." ■ For Scenario 2, the operating elevation was 0.50-foot above the set point where the pumps cycle on, which means the system wells will be "off." ■ The maximum diameter mains considered to accommodate the desired fire -flows were 24-inch diameter. Additional facilities will need to be considered if the desired flows cannot be achieved with smaller sized mains. ■ There were no new/additional demands (e.g. domestic usage) added within the evaluation area, aside from the fire -flow analysis. ■ The minimum allowable pressure during the fire flow analysis was 20-psi. ■ A Hazen -Williams roughness coefficient of 150 was used for all new PVC. 2.2.2 Modeling Software All modeling was completed using the existing water system model developed for the March 2008 Facility Plan Update and the 2012 model update. This model was provided by the City of Kalispell. The modeling software package utilized was the WaterCAD V8i software package distributed by Bentley. Modeling was completed in the Steady State mode with a fire flow simulation in the area of the proposed water mains. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 6 2.2.3 Modeling Results The modeling was completed utilizing the following process: i. Complete a fire -flow analysis with variable main sizes and material to confirm the desired fire flows can be achieved. 2. Increase main sizes incrementally and re -run the fire -flow analysis until the desired fire flows are achieved, up to 24-inch mains. The following scenarios were considered for the modeling: ■ Scenario 1 - Tanks near empty (3058') with the source water pumps turned on to fill the reservoirs. ■ Scenario 2 - Tanks near full (3074') with the source water pumps turned off. 2.2.4 Water Main Extension Evaluation The initial fire flow analysis included a combination of new 8-inch, 10-inch, 12-inch, and 16-inch PVC mains in the evaluation area. This sizing is based on the anticipated development in the area and engineering judgement. The corresponding sizes and desired fire flow rates are as presented in Figure 2.2-1. Main extensions were sited in strategic locations within the service area to meet City standards, minimize dead -ends and facilitate looping while serving existing subdivisions and future development areas. As development occurs, water mains should be extended and looped as necessary from those mains depicted in this report to meet the demands of the new developments. The 2008 Water Facility Plan Update included provisions for the addition of a 1.5 MG storage tank located on Rocky Cliff Drive to serve the South Kalispell area. Modeling took into account only present day conditions and therefore, did not account for this tank being incorporated into the water system. 2.2.4.1 Scenario 1 Based on the results of the initial analysis and corresponding main sizing, at least 1,500-gpm fire flows can be achieved for those areas with a 1,500-gpm goal; however, a fire -flow of 4,000-gpm cannot be achieved for those areas with a 4,000-gpm goal. Therefore, the main sizes were incrementally increased to determine if the 4,000 gpm goal could be achieved. As shown in Table 2.2-1, the 4,000-gpm fire flow goal cannot be achieved through increasing the size of the proposed mains alone. Modeling shows a minimal increase in available fire flows when comparing the initial sizing to the "all 24-inch mains" results. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 7 12" PVC 12" PVC } FLO0GPM FI RE ,Nl 'FLOW GOAL) LOWER VALLEY ROAD — - MIXED USE (MU) CITY PROPERTY EXISTING WATERMAIN SUBURBAN RESIDENTIAL (SR) URBAN RESIDENTIAL (UR) — — FUTURE WATERMAIN — COMMERCIAL (C) J-382 WATER MODEL NODE — INDUSTRIAL(I) PROPOSED WATERMAIN SCALE FEET I 1=21e PN WATER MODELING MAIN SIZING a Ew oCITY OF KALISPELL WATER & SEWER FACILITY PLAN UPDATE «yL \ 'n--TTr FIGURE2.2-1 p ,2c,6-322p.-PUT—c,ofK1,i 1l1tl5615005 KelisPall�evebPerbaensonTednirzl5ervicesV0�_Pa�ev9nA05_—bits\W ,lzy ldc (Fg-22-,) ©KLI 2016 JUNCTION ID Table 2.2-1: Scenario 1 Modeling Results AVAILABLE FIRE FLOW AVAILABLE FIRE FLOW W/INITIAL SIZING W/ALL 24-INCH MAINS (GPM) (GPM) FIRE FLOW GOAL (GPM) J-378 >3,000 >3,000 1,500 J-379 >3,000 >3,000 1,500 J-380 >3,000 >3,000 1,500 J-381 3,284 3,301 4,000 J-382 3,248 3,299 4,000 J-383 3,156 3,293 4,000 J-384 3,276 3,301 4,000 J-385 2,881 >3,000 1,500 J-386 >3,000 >3,000 1,500 J-387 > 3, 000 > 3, 000 1,500 J-388 3,297 3,302 4,000 J-389 2,528 >3,000 1,500 J-390 3,007 3,126 4,000 J-391 3,285 3,301 4,000 J-392 2,388 >3,000 1,500 J-393 2,975 >3,000 1,500 J-394 >3,000 >3,000 1,500 J-39 5 3,240 3,302 4,000 2.2.4.2 Scenario 2 Similar to Scenario 1, the fire -flow can be achieved based on the initial sizing for all areas with a 1,500- gpm goal. However, the desired fire -flow cannot be achieved for those areas with a 4,000-gpm goal. Therefore, the main sizes were incrementally increased to determine if the 4,000 gpm goal could be achieved. Table 2.2-2 summarizes the Scenario 2 modeling results. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 JUNCTION ID Table 2.2-2: Scenario 2 Modeling Results AVAILABLE FIRE FLOW AVAILABLE FIRE FLOW (GPM) W/ INITIAL (GPM) W/ALL 24-INCH SIZING MAINS FIRE FLOW GOAL (GPM) J-378 1,838 1,853 1,500 J-379 1,837 1,853 1,500 J-380 1,837 1,853 1,500 J-381 1,836 1,853 4,000 J-382 1,829 1,852 4,000 J-38 3 1,804 1,851 4,000 J-384 1,835 1,853 4,000 J-38 5 1,718 1,848 1,500 J-386 1,848 1,853 1,500 J-387 1,847 1,853 1,500 J-388 1,847 1,853 4,000 J-389 1,829 1,853 1,500 J-390 1,842 1,853 4,000 J-391 1,839 1,853 4,000 J-392 1,787 1,853 1,500 J-393 1,843 1,853 1,500 J-394 1,846 1,853 1,500 J-395 1,846 1,853 4,000 Based on the modeling results, the desired fire flows cannot be achieved without consideration to other facility improvements. The most likely options to facilitate higher available flow rates at the south end of the pressure zone are as follows: 1. New/Larger Mains - Available fire flows could be increased through upsizing of existing mains or installation of parallel mains from the existing storage tanks to the area of interest. This solution would require a significant amount of new transmission main to extend from the storage reservoirs to the area of interest and is fiscally impractical. New Pump Station - A new pump station could be constructed to serve the south end of the pressure zone. The pump station would require the installation of check valves (or other flow direction controls) upstream and would likely only be utilized during emergency conditions. If additional looping is possible from the area of interest back towards Highway 2 along the US-93 Bypass, additional flow direction controls may be necessary for proper function of an emergency pump station. There is also a possibility of creating a new pressure zone altogether. This option would require significant analysis to determine its feasibility. Such analysis is outside the scope of this report. 3. New Storage Tank - The construction of a new storage tank at the south end of the pressure zone, which is in support of the 2008 Facility Plan Update, is expected to increase the available fire flow and provide more redundancy within the distribution system. Land availability, long-term growth plans, additional modeling, and capital costs should be considered before moving forward with any solutions to achieve the desired fire flows within the area of interest. It is likely several long-term concerns could be addressed through some front-end planning and analysis. 2.2.4.3 Alternative Sizing Considerations Because the area of interest is relatively close to the source water wells, but relatively far from the storage tanks, Scenario 2 is the "worst -case" scenario and will govern this evaluation. While the fire flow goal of 4,000 gpm is not attainable with the current system, there may be a tank or other City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 10 improvement to the system to allow for the 4,000 gpm fire flow in the future. The mains should be sized to allow for this fire flow. A maximum velocity of no greater than 10-fps under fire -flow conditions is recommended in cases of proposed mains.' For a 4,000-gpm fire -flow (without a significant domestic demand), a velocity of approximately 5.7-fps is achieved when flowing through a 12-inch looped main assuming exactly half of the flow comes from each branch of the loop. Fire flows rarely split exactly in half, so one branch typically sees increased velocity. Using 12-inch mains helps ensure velocities do not exceed 10-fps in the branch carrying the higher flow. As a result, a 12-inch main is the minimum diameter recommended for any areas with a desired fire -flow of 4,000-gpm. The cost -difference for the installation of a 12-inch main is relatively minor to that of a 10-inch or 8-inch main. Mains smaller than 8-inches are not recommended for new developments with minimum 1,500- gpm fire -flows. Additionally, if the proposed mains have the potential to be used as the "skeleton" or "core" of a future development area, a minimum main sizing of 12-inch is recommended. However, the development at the eastern extents of the model (south of Lower Valley Road between J-378 and J-394) can be served by 8-inch mains as long as the fire flow goal remains 1,500 gpm and the mains are not anticipated to be serving future developments with large demands/fire-flows. Because of the above considerations, each of the proposed mains identified in Figure 2.2-2 should be at least 12-inches in diameter, except where 8-inch is noted to be acceptable. The model was run with 8- inch and 12-inch mains as depicted in the figure. The available fire flow resulting from the proposed mains are as provided in the table below. Comprehensive Water Distribution Systems Analysis Handbook, Second Edition, Boulos/Lansey/Karney, page 7-34 City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 11 EXISTING WATERMAIN MIXED USE (MU) CITY PROPERTY _ _ FUTURE WATERMAIN SUBURBAN RESIDENTIAL (SR) URBAN RESIDENTIAL (UR) FIRE FLOWS -AT NODE 0 - 1,499 — COMMERCIAL (C) 1-3w WATER MODEL NODE • 1,500 - 3,000 3,001 - 4,000 — INDUSTRIAL(I) —wPROPOSED WATERMAIN 9 4,001-5,000 5,001 - 10,000 PROPOSED WATER MAINS a�FwF°° SOUTH KALISPELL WATER & SEWER FACILITY PLAN UPDATE «yKC L °E°"T� FIGURE 2.2-2 a ,zoie-323p.-P�cinFsay arKao.pemisaisoos Kao.peuoe.ebne�ae�.q�remm�iservme.mi_w�°esemos_E,mm�-1—ldx (Fw-2—) ©KLl wre Table 2.2-3: Scenario 2 12-Inch Main Sizing Recommendation AVAILABLE FIRE FIRE FLOW INCREASE IN FIRE PERCENT INCREASE JUNCTION ID FLOW W 12- NCHPMAIN GOAL (GPM) LOW (PM) IN FIRE FOW W/24 I CHGMAINS W/24-INCHLMAINS J-378 1,846 1,500 7 0.38% J-379 1,845 1,500 8 0.43% J-380 1,845 1,500 8 0.43% J-381 1,845 4,000 8 0.43% J-382 1,833 4,000 19 1.04% J-383 1,783 4,000 68 3.81% J-384 1,845 4,000 8 0.43% J-385 1,700 1,500 N/A, Fire Flow Goal Achieved J-386 1,845 1,500 N/A, Fire Flow Goal Achieved J-387 1,851 1,500 N/A, Fire Flow Goal Achieved J-388 1,851 4,000 2 0.11% J-389 1,828 1,500 N/A, Fire Flow Goal Achieved J-390 1,848 4,000 5 0.27% J-391 1,846 4,000 7 0.38% J-392 1,788 1,500 N/A, Fire Flow Goal Achieved J-393 1,848 1,500 N/A, Fire Flow Goal Achieved J-394 1,850 1,500 N/A, Fire Flow Goal Achieved J-395 1,850 4,000 3 0.16% In order to determine whether or not larger mains would yield increased fire flow, the size of the proposed mains was increased to 24-inch in the model. The increase in fire flow was determined to be negligible. The largest increase was at junction J-383 and was less than 4%. The remainder of the system saw an increase of 1% or less. Increasing the size of the mains beyond 12-inch would not result in an adequate return on investment. Therefore, 8-inch and 12-inch mains are appropriate for all of the proposed mains. 2.2.5 Conclusions The analysis indicates the planning area can expect minimum available fire flows between 1,700-gpm and 1,900-gpm regardless of the sizing combinations that were modeled. The desired fire -flows can only be achieved in a portion of the analyzed area. Those segments requiring 1,500-gpm can be serviced with the proposed mains. However, areas requiring 4,000-gpm fire flows will require an alternative solution to meet the demands. As previously provided in the results table, only incremental gains can be achieved by increasing the size of the proposed mains. If 4,000-gpm is required, a more in depth system wide planning effort is recommended to determine the best option for attaining this goal. Based on the additional analysis completed, there is a negligible difference in available flows between 12-inch and 24-inch mains. Due to the additional costs and minimal benefit associated with 24-inch diameter mains, 8-inch and 12-inch PVC mains are recommended for this area. The final determination should be made by the City of Kalispell and the Fire Chief. Because this analysis showed this area cannot meet the goal of 4,000 gpm, additional improvements in this area may be necessary in the future. Based on typical velocity limitations, the 12-inch mains are expected to accommodate future expansion while keeping fiscal responsibility at the forefront. Layout of the main extensions shown in Figure 2.2-2 was developed to loop existing and proposed mains to provide more reliable flows and pressures. This effectively minimized the number of dead-end mains in keeping with the City's standards. Dead-end mains depicted should be looped as development occurs. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 13 2.2.5.1 Future Recommendation In order to achieve the 4,000 gpm fire flow goal, systemic changes will be needed such as upsizing existing mains, adding parallel mains, adding a new booster station, or adding a new storage tank. Such large changes to this pressure zone must be analyzed in further detail before they could be implemented. A Kalispell South Water System Master Plan is recommended to evaluate which if any of these options is viable and to determine which is in the best interests of the City. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 14 Chapter 3 - WASTEWATER COLLECTION 3.1 Introduction This Chapter will identify strategic locations for constructing the main components of a new sanitary collection system. The proposed sewer system flow established in Chapter 1 will serve as the basis for sizing the proposed sewer mains. Table 3.1-1: Summary of Sanitary Sewer Flow STUDY AREA STUDY AREA ERU AVERAGE DAILY FLOW PEAK HOURLY FLOW POPULATION (MGD) (GPM) 10,355 4,142 3.4 2,330 3.2 Sewer Collection System Summary The topography of South Kalispell is the key factor in locating proposed collection system infrastructure. The area was studied to identify and maximize the locations that could be served via gravity sewer and those that would require a lift station. Highway US-93 splits the project area into east and west regions and each region was delineated into smaller sewer service areas. These areas are depicted in Figure 3.2-1 and Figure 3.2-2 and include the contributing land use, area and the general gradient. Utilizing the delineations of the sewer service areas, locations of main sewer collectors were identified. Each service area will connect to the appropriate gravity collectors via gravity sewer or local lift station and force main. For example, the topography of S-W-10 generally drains south and west toward Ashley Creek and the US-93 Bypass. It is anticipated that this area can be served by gravity mains ultimately being collected in a main adjacent to the US-93 Bypass. Service area S-W-5 also flows south and west toward Ashley Creek. However, this area will require a local lift station to convey wastewater to a northerly gravity main ultimately discharging into the existing City lift station at Ashley Creek and US- 93. Table 3.2-1 summarizes the population to be served by each service area. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 15 Table 3.2-1: Summary of Service Area Population SERVICE SR UR C I MU CP2 POPULATION' ERU4 AREA (ACRES) (ACRES) (ACRES) (ACRES) (ACRES) (ACRES) S-W-1 57.0 570 228 S-W-2 39.8 39 16 S-W-3 19.7 19 8 S-W-4 61.3 0.6 628 251 S-W-5 76.0 18.7 1228 491 S-W-6 16.1 16 6 S-W-7 14.8 55.6 424 170 S-W-8 37.6 940 376 S-W-9 12.7 6.1 61.0 2.2 383 153 S-W-10 56.7 7.2 1418 567 S-W-11 18.8 31.1 470 188 S-W-12 16.1 8.3 24 10 S-E-1 19.0 52.7 242 97 S-E-2 52.0 98.8 617 246 S-E-3 2.3 107.9 108 43 S-E-4 17.3 17 7 S-E-5 60.4 3.8 32.1 639 256 S-E-6 72.2 722 289 S-E-7 7.8 78 31 S-E-8 116.6 1166 466 S-E-9 60.7 607 243 Total 583.0 159.9 45.6 211.0 281.0 40.5 10,355 4142 1. Population = [4SR+10UR+0.39C+0.391+0.39MU] x 2.5 2. City Property is considered undevelopable and therefore, does not contribute to any future population/flows. 3. SR = Suburban Residential, UR = Urban Residential, C = Commercial, I = Industrial, MU = Mixed Use, CP = City Property 4. One ERU is defined as 2.5 people. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 16 T MIXED USE (MU) CITY PROPERTY (CP) SUBURBAN RESIDENTIAL (SR) URBAN RESIDENTIAL (UR) — COMMERCIAL (C) FLOW GRADIENT — INDUSTRIAL(I) PROPOSED WEST SEWER SERVICE CITY OF KALISPELL WATER & SEWER FACILITY PLAN UPDATE FIGURE 3.2-1 P ,2- 3 17p.-PUFE�,ndf 1,pe11-13003-IIoe.ebPe e�.q�Fe��serv��e.�o,_P,�oes9��os_��e��e,L a1ft9(Fg-321) Too o Too SCALE FEET T-<<-VKll i nwFa vni i F anon MIXED USE (MU) FLOW GRADIENT SUBURBAN RESIDENTIAL (SR) — COMMERCIAL (C) — INDUSTRIAL(1) PROPOSED EAST SEWER SERVICE AREAS CITY OF KALISPELL WATER & SEWER FACILITY PLAN UPDATE FIGURE 3.2-2 P ,2- 319p.-P�rE na,�.pe„�soos�.peoe.ebPe e.gre� misery a,o,_P, oes9,os_�e,.��e, �o 9F9,a3zz 3.3 Future Sewer Flow Analysis 3.3.1 Collection System Evaluation Criteria In order to size the proposed mains and verify that the existing main running along the east side of US- 93 can accept additional sewer flows, the anticipated population for each service area is converted to ERUs in accordance with the 2008 Wastewater Facility Plan. The peak hourly flow for each service area was determined using a 3.05 peaking factor. All sewer mains were sized with a 1.2 factor of safety and assumed that minimum slope values would be used during design, therefore, serving as a conservative estimate of flow capacity. 3.3.2 Sewer Main Extension Evaluation 3.3.2.1 West Sewer Service Area Generally, the west service area drains north to south and is split into three smaller regions by the US- 93 Bypass and Ashley Creek. Figure 3.3-1 identifies the ERUs and peak flow anticipated from each service area and depicts the proposed sewer main locations and sizing that will serve each area. Several of the service areas can be served by a local lift station, which could pump up to one of the proposed gravity mains. Table 3.3-1 summarizes the service areas' ERUs, peak flows and sewer main(s) collecting flow from the area. Table 3.3-1: West Service Area Hydraulic Summary PEAK SERVICE AREA ERUs FLOW' (GPM) S-W-1 228 128 S-W-2 16 9 S-W-3 8 4 S-W-4 251 141 S-W-5 491 276 S-W-6 6 4 S-W-7 170 95 S-W-8 376 211 S-W-9 153 86 S-W-10 567 318 S-W-11 188 106 S-W-12 10 5 RECEIVING MAINS SM-1 SM-1 SM-1 SM-213 to SM-2A SM-2C to SM-213 to SM-2A SM-213 to SM-2A SM-2D to SM-213 to SM-2A SM-2C to SM-213 to SM-2A SM-3C to SM-3A to SM-2A SM-313 to SM-3A to SM-2A SM-3C to SM-3A to SM-2A SM-4 1. Peak Flow = ERU x 265 gpd x 3.05 _ 24 hours/day _ 60 minutes/hour 2. LS-AC = Existing Ashley Creek Lift Station RECEIVING LIFT STATION LS-ACz LS-ACz LS-ACz LS-SW4 to LS-ACz LS-SW5 to LS-ACz LS-ACz LS-ACz LS-ACz LS-ACz LS-ACz LS-SW11 to LS-ACz Ex. Four Corners LS Two US-93 crossings at Ashley Creek and Rocky Cliff Drive would be necessary to avoid the construction of a new regional lift station. These crossings could connect to the existing 12" and 15" gravity mains on the east side of US-93, which have sufficient capacity to accept additional flows. Table 3.3-2 provides a summary of the proposed sewer main sizes and anticipated gravity flow. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 19 Table 3.3-2: Summary of West Sewer Main Sizin3 PROPOSED CONTRIBUTING CONTRIBUTING PEAK SEWER DISCHARGE SEWER MAIN ERUs SERVICE AREA FLOW MAIN SIZE LOCATION (GPM) (INCHES) SM-1 12' Ex. 15" Main @ Rocky 252 1 2 3 141 Cliff Drive SM-2A 2202 4,5,6,7,8,9,10,11 1237 18 Ex. Ashley Creek LS SM-213 1294 4,5,6,7,8 727 15 SM-2A SM-2C 867 5,8 487 12 SM-213 SM-21D 170 7 95 8 SM-213 SM-3A 908 9,10,11 510 12 SM-2A SM-313 567 10 318 8 SM-3A SM-3C 341 9,11 192 8 SM-3A SM-4 10 12 5 8 Ex. Four Corners LS 1. Main has been upsized from 8" to 12" as there is potential to receive additional flows from areas west of Ashley Creek. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 20 r'GnnGTGOV ono n /— EX. FOUR CORNERS LIFT STATION SCALE FEEL MIXED USE (MU) SUBURBAN RESIDENTIAL (SR) URBAN RESIDENTIAL (UR) FM PROPOSED FORCEMAIN — COMMERCIAL (C) PROPOSED 8" GRAVITY SEWER FM— EXISTING 6" FORCEMAIN PROPOSED 12" GRAVITY SEWER — — — SERVICE AREA BOUNDARIES — INDUSTRIAL (1) PROPOSED 15" GRAVITY SEWER PROPOSED JUNCTION CITY PROPERLY PROPOSED 18" GRAVITY SEWER LS REGIONAL LIFT STATION (UNDEVELOPED) :: EXISTING GRAVITY SEWER n LOCAL LIFT STATION °A^ E°° PN WEST SERVICE AREA SEWER MAIN LOCATIONS a�E . CITY OF KALISPELL WATER & SEWER FACILITY PLAN UPDATE «yKC L ,,7'E TT FIGURE 3.3-1 p ,2-,6-321p.-PICITIESCiry of KailzVeiitl56,SODS KalisPall°evebPerbaenzoniednlrziServlaez��,_P,a°ev9N�5_EMIM1Its�Sewer LaYuotwIN PIVlo9-tlw91F9o,e33,) ©KLI 2016 3.3.2.2 East Sewer Service Area The east region is also divided into three smaller service areas with two situated adjacent to US-93, split by Ashley Creek. The third area is located east of a southeasterly running drainage located approximately 1,000 feet east of US-93 and south of Lower Valley Road. Figure 3.3-2 identifies the ERUs and peak flow anticipated from each service area and depicts the proposed sewer main locations and sizing to serve each area. Table 3.3-3 summarizes the service areas' ERUs, peak flows and sewer main(s) collecting flow from the area. Table 3.3-3: East Service Area Hydraulic Summary SERVICE AREA ERUs PEAK FLOW' RECEIVING MAINS (GPM) S-E-2 S-E-3 S-E-4 S-E-5 S-E-6 S-E-7 S-E-8 S-E-9 1. Peak Flow = EF 2. LS-AC = Existin 97 54 SM-5 to Ex. 15" Main (So 246 138 Ex. 15" Main (South) 43 24 Ex. 12" Main 7 4 Ex. 15" Main (North) 256 143 SM-6 289 162 SM-6A 31 18 SM-7 466 262 SM-7 243 136 SM-613 U x 265 gpd x 3.05 _ 24 hours/day _ 60 minutes/hour g Ashley Creek Lift Station RECEIVING LIFT STATION Ex. LS-ACI Ex. LS-ACZ Ex. Four Corners LS New Demersville LS New Demersville LS LS-SE7 to Demersville LS LS-SE8 to Demersville LS LS-SE9 to Demersville LS The existing Ashely Creek regional lift station located at US-93 and Ashley Creek serves the areas adjacent to US-93 by receiving wastewater flows from an existing 12" main from the north and an existing 15" main from the south. Two 6-inch force mains convey wastewater from the lift station to an existing 15" main which discharges to the existing Four Corners Lift Station. A new regional lift station sited at the south boundary of Service Area S-E-6 at Demersville Road could serve the residential area south and west of Lower Valley Road. The Demersville Lift Station would need to be located on the east side of the road to be located out of the 100-year floodplain. As all of these service areas require a local lift station, the site of the proposed Demersville Lift Station is centrally located to serve all of the contributing areas, minimizing the length of small diameter force mains. Table 3.3-4 provides a summary of the proposed sewer main sizes and anticipated gravity flow. Table 3.3-4: Summary of East Sewer Main Sizing CONTRIBUTING CONTRIBUTING PEAK SEWER SEWER MAIN ERUs SERVICE AREA FLOW MAIN SIZE DISCHARGE LOCATION (GPM) (INCHES) EX. 15" (S)Z 342 1,2 192 15 Ex. LS-AC EX. 12" 43 3 24 12 Ex. LS-AC EX. 15" (N)3 7 4 4 15 Ex. Four Corners LS SM-6A 545 5,6 305 125 New Demersville LS SM-613 243 9 136 8 New Demersville LS SM-74 186 7,8 105 8 LS-SE8 to Demersville LS 1. Main has been upsized from 8" to 12" as there is potential to receive additional flows from areas south of Auction Road. 2. Ex. 15" (S) extends north from Old School Station to the Ex. Ashely Creek Lift Station. 3. Ex. 15" (N) extends north from approximately 1500' south of Lower Valley Road to the Ex. Four Corners Lift Station. 4. It is estimated that a third of the contributing S-E-8 ERLIs will discharge directly to SM-7. The remaining two-thirds will collect at S-E-8 via other local mains. 5. Main has been upsized from 10" to 12" as there is potential to receive additional flows from north of Lower Valley Road. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 22 LOWER VALLEY ROAD —0 EX. 15" MAIN 1787 GPM S E 4 I^ 7 ERU 4/GPM � S-E-5256 ERU 143 GPM 1�, EX. 12" MAIN AP GPM CAPACITY II �00. ml al el �,_ SE-3 43 ERU 24 GPM EX. 12" MAIN 3182 GPM CAPACITY S E-7 31 ERU 16 GPM _ SCALE FEET r✓ MIXED USE (MU) PROPOSED JUNCTION PROPOSED 15" GRAVITY SEWER SUBURBAN RESIDENTIAL SR Ls REGIONAL LIFT STATION PROPOSED 18" GRAVITY SEWER ( ) EXISTING GRAVITY SEWER — COMMERCIAL (C) LOCAL LIFT STATION — — — — — — SERVICE AREA BOUNDARIES PROPOSED 8" GRAVITY SEWER FM PROPOSED FORCEMAIN INDUSTRIAL (1) EXISTING 6" FORCEMAIN .- PROPOSED 12" GRAVITY SEWER EAST SERVICE AREA SEWER MAIN LOCATIONS CITY OF KALISPELL WATER & SEWER FACILITY PLAN UPDATE <KC FIGURE 3.3-2 p ,2-,6-32Dp.-PICITIESCiry of KailzVeiitl56,5005 KailzVeii�evebVe,baenzoniednl"ziServlaez��,_P,a�ev9N�5_EMIM1Its�Sewer LaYuotwIN PIVlo9-dx91F9o,e332) ©KLI 2016 There appears to be sufficient capacity in the existing 12" main to receive additional flows from the west region north of the US-93 Bypass, which would account for 510 gpm (SM-3A). A more conservative approach was taken to site the crossing south at Ashley Creek and thus serve businesses that front US-93 and discharge into a portion of the main with significantly more capacity. It may be more cost effective to construct an additional crossing at the US-93/US-93 Bypass intersection versus installing an additional 3,000 lineal feet of 12" sewer main. 3.3.3 Conclusions The focus of this facility plan update with regard to the collection was on the system's ability to serve the anticipated growth of the South Kalispell planning area. Based on the projected development and flows, the existing infrastructure previously constructed along US-93 to serve the area has sufficient capacity to sustain additional growth. The planning area has decreased to encompass a smaller but still significant area. Most regions can be served with gravity sewers. However, topographic constraints still warrant the installation of six local lift stations and one larger regional lift station. More extensive analysis may indicate that future lift stations may not be necessary, and the City should work with developers to exclude lift stations whenever feasible. 3.3.3.1 Future Recommendations Construction of new infrastructure is only necessary to the extent that new development moves into the area. It is anticipated that most new growth will occur along the US-93 corridor and expand outward. The core system infrastructure is already in -place on the east side of US-93. Therefore, the City's focus on serving future development should be directed at the west side of US-93. As previously indicated, it may be possible to collect wastewater from the area north of the US-93 Bypass and convey it directly across US-93 at the Bypass intersection. As proposed development through the region occurs, it is recommended that an evaluation of this crossing location and a cost estimate associated with constructing the new gravity main be developed. If growth continues to materialize in this area, the City could work with development, through the extension of services policy, to connect existing facilities. City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 24 Appendix A: Existing Water Usage Data City of Kalispell Water Et Sewer Facility Plan Update PN#15415005 T M F- w O T N d LU RN a� .-I ro a q U 0 q o ro U .-I ui a P9 O N T O O T T Q Qi .a o ro 0 G1 ^2 E lC O C. C. u) N ._ lC F Y w U) D d 'tm O M w m a� a O O �' w = ui Q Z 'r' O Z u) i. N I a N O H N M M 0 Z L W o a 00 ai U o N 4) Z C a Q F- LU J (L 0 0) N E U) C Q O J V N O y Y N m WLl. CD o N LL i L N LL O O N L m 1 H~ N LL N 2 a.Q Q C d� H Z d m = G U) O L L G1 d ~ O G d �6 ^w Z O To N M Sa ro O U q O O M O T O 00 L d 0 N O w 41 £ U Am Z O C O F O J w V a N Q pq A 0 O i1 W N1 O m -Q ro T W A O T O Z d N 0 N N O N 1a T o72 a a O C. T C. o a a N I o O �p U CKi ro O 3 m p E E 0 rl 0 rl 0 rl O z O z O z Jai W iD W r A O rl h S.' A N Ol N S.' 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C. u) N .� lC H i N N N > d O M w s1 a� a O O Q Z CDZ u) i. N u a N O ~ CMM M 0 9 Z L W o a O O ai U o N Z C d a, d N E U) C Q O J V N O y Y N m NWLl. o LL i L CO 0 LL O O H L m a H~ N LL N 2 a.Q Q C d� H Z d m = G U) O L L ci ~ o E N -H �a ^ m 1 Z O N N M s1 ro O U q O O M O T O 00 L d 0 N E U A A Z O C O F 7 O J N1 V .a Q P9 A 0 O W 1 T W A O T O Z d N N 0 T N 1J o72 a a o O' T C. o a a N I O . 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From: Andy Evensen [mailto:andy.evensen@kljeng.com] Sent: Wednesday, September 02, 2015 9:52 AM To: Dave Dedman <ddedman@kalispell.com> Subject: RE: Kalispell Fire Demand Thank you for the response, Dave. This is not for a specific development but the South Kalispell area in general. I understand that the fire flows will need to be evaluated on an individual basis once a specific development is planned for the area. We want to provide the City with a water main sizing that can meet the anticipated flows of the area. Granted, since we don't have specifics on building size and type, this is difficult to do. Do you happen to know if there are existing mixed-us/commercial/industrial areas within Kalispell that require fire flows in excess of 4000 gpm? Andy Evensen PE KLJ - Kalispell 406-755-2763 From: Dave Dedman [mailto:ddedman@kalispell.com] Sent: Wednesday, September 02, 2015 9:36 AM To: Andy Evensen Subject: RE: Kalispell Fire Demand Andy, is this for a development? The 1500 GPM residential and 4000 GPM for commercial is a safe estimate. have seen where 1500 GPM may not meet the need for some residential homes due to the size of the structure. We base our fire flows need using the IFC 2012 appendix B which list the minimum fire flows and durations for type and size of building. If it is a mixed use area then the higher fire flow needs will be required for the areas in question. I would need more information to feel comfortable answering any additional questions. From: Cec Lee Sent: Tuesday, September 01, 2015 12:43 PM To: Dave Dedman <ddedman@kalispell.com> Subject: FW: Kalispell Fire Demand From: Andy Evensen[mailto:andv.evensen(a)klieng.com] Sent: Tuesday, September 01, 2015 12:39 PM Subject: Kalispell Fire Demand Good Afternoon Chief Dedman, I am working with the Kalispell Public Works Department to plan for and size water and sewer infrastructure in the South Kalispell area. Can you provide any guidance for what fire flows should be provided in residential, commercial, industrial and mixed -use areas in Kalispell? I'm assuming 1500 gpm for residential and 4000 gpm for the other areas but wanted to make sure these are consistent with the Fire Department's requirements. Thanks, Andy Evensen PE <<,KL] 11 406-755-2763 Direct 406-897-4137 Cell 1830 3rd Avenue East Suite 202 Kalispell, MT 59901-5578 kljeng.com