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2. Resolution 5406 - Standards for Design and Construction - 2009 Update201 1"Avenue East, P.O. Box 1997, Kalispell, MT 59903 Phone (406) 758- 7720 — Fax (406) 758- 7831 www. kalispell com REPORT TO: Mayor and City Council FROM: James C. Hansz, P.E., Director of Public Works/City Engineer SUBJECT: Resolution 5406— Standards for Design and Construction — 2009 Update MEETING DATE: November 16, 2009 Background: Periodically, the City updates its Standards for Design and Construction to ensure the standards are in conformance with current requirements of State and Federal agencies, changes in various materials and methods used in construction, and to ensure the standards reflect the best practices necessary to support a vibrant and growing community. Several changes have occurred since the last update; most notably the City is now regulated under a permit issued by MDEQ for the discharge of municipal stormwater to State waterways. This was done under the State permitting program commonly referred to as MS4. The City's stormwater discharge permit has many required minimum measures and we have worked several years toward their full implementation. One critical minimum measure has been the requirement to develop and implement comprehensive standards for stormwater related construction and mitigation measures. The addition of stormwater standards comprises the bulk of changes within the document. Several other smaller changes have also been incorporated. As done in the past, all these proposed changes have been circulated throughout the local engineering community and their comments have been addressed and, where appropriate, incorporated into the present document. The proposed standards have been posted on the City's website since early January 2009. Several earlier staff memos have outlined the process for this update or addressed items of concern raised during the update process. These are attached to highlight the long process followed for this update and the on -going dialog with City Council that has been the subject of several prior work sessions with City Council. These memos are attached and they focus on the following: Memo of January 30, 2009: Staff memo outlining the form to be followed for the update effort that outlined a fresh Chapter 3 within the standards that deals with the issue of stormwater management and mitigation. Memo of September 22, 2009: Staff memo that accompanied the proposed revised Standards for Design and Construction. The changes within the 171 page set of standards were supplied to and circulated throughout the local engineering, development and construction community. The comments received and suggested changes were carefully evaluated and appropriate revisions were incorporated into the standards document provided with the memo. It should be recalled that some of the changes in the proposed update were based on requests from the local community. For example, the change to increase the width of the front yard utility easement, from 5' to10', originated with other local utilities that had requested a wider easement to simplify their installation and maintenance of the utility lines they install to serve those properties. However, most of the changes relate to the requirement in our MS4 permit to develop and implement comprehensive stormwater management standards. Memo of October, 21 2009: At a previous work session questions were raised regarding the potential cost impacts related to the proposed changes. These potential costs were estimated based on the guidance parameters received from City Council at the work session. Memo of November 10, 2009: At the direction of the City Manager, staff from Parks, Planning and Public Works Departments have initiated efforts to develop a protocol for combined uses of park land and stormwater land. Each of these two land uses within a development has typically required a separate dedication for most projects. Staff is attempting to identify the various parameters that would allow these two separate uses to be satisfied by a single dedication of land so that development costs can be reduced while still meeting the intent of the original requirements. The proposed update to the City's standards is the most comprehensively considered update that has ever been placed before City Council. Over the past several years many changes related to storm water management have been incorporated into the City's operations and its ordinance structure. The City is required to have a comprehensive standards document that thoroughly addresses stormwater management so that future development of the City can be accomplished in a manner that is consistent with the requirements imposed on the City by the State via the MS4 permit process. The proposed update meets this requirement. Staff recommends approval of Resolution 540(b ACTION REQUESTED: AT CITY COUNCIL MEETING OF NOVEMBER 16Tx, MOTION TO ADOPT RESOLUTION NUMBER 54 - STANDARDS FOR DESIGN AND CONSTRUCTION — 2009 UPDATE FISCAL EFFECTS: Potential expenditures of public and private funds in varying and not totally predictable amounts in order to comply with the revised standards. ALTERNATIVES: As suggested by the City Council a s C. Hansz, P.E. Jane Howington Director of Public Work / Jity Engineer City Manager Attachments: Staff memos RESOLUTIONO, 5406 KALISPELL,A RESOLUTION TO AMEND THE 2005 STANDARDS FOR DESIGN AND CONSTRUCTION FOR THE CITY OF EFFECTIVE D. WHEREAS, on July 18, 2005, the City of Kalispell adopted Resolution No. 5030, the "2005 Standards for Design and Construction" for the City of Kalispell, Montana, and WHEREAS, periodically the City updates its Standards for Design and Construction to ensure the standards are in conformance with the current requirements of State and Federal agencies, changes in various materials and methods used in construction and to ensure that the standards reflect the best practices necessary to support a vibrant and growing community, and WHEREAS, on October 19, 2009, the City of Kalispell adopted Resolution No. 5399, a Resolution of Intent to amend the Standards for Design and Construction, and WHEREAS, on November 2, 2009, the City Council of the City of Kalispell held a public hearing, after due and proper notice, and received one public comment upon the proposed amendments to the Standards for Design and Construction, and WHEREAS, upon consideration of the recommendations made by the city public works professional staff, comments provided by the public and upon review of the proposed amendments, the City Council of the City of Kalispell finds that it is in the best interest of the City to amend the Standards for Design and Construction as set forth in Exhibit "A" attached hereto. NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF KALISPELL AS FOLLOWS: SECTION I. The City of Kalispell Standards for Design and Construction shall be and is hereby amended as set forth in Exhibit "A", attached hereto. Exhibit "A" shall be made available to the public upon request at the city offices of Public Works. SECTION II. This Resolution shall become effective immediately following its passage by the City Council and approval by the Mayor. PASSED AND APPROVED BY THE CITY COUNCIL AND SIGNED BY THE MAYOR OF THE CITY OF KALISPELL, THIS 16TH DAY OF NOVEMBER, 2009. ATTEST: Theresa White City Clerk Pamela B. Kennedy Mayor 201 P Avenue East, P.O. Box 1997, Kalispell, MT 59903 —Phone (406) 758-7720 — Fax (406) 758-7831, www.kalispell com WI To: City Council Member Re: City of Kalispell's Standards for Design and Construction 2009 Update Date: January 30, 2009 The City of Kalispell Public Works Department is in the process of updating the current Standards for Design and Construction which became effective July 2005. The draft 2009 Standards for Design and Construction will be open for Public Comment until March 2, 2009. The draft Standards provide updates in the following Chapters: 1. General Provision 2. Design Standards 3. Stormwater Design Manual (new chapter) 4. Construction Standards 5. Standard Drawings The intent of the update is to incorporate changes in the standards since the last revision. The new chapter, Stormwater Design Manual, was added to the standards to incorporate updated stormwater design methods, new water quality design methods which are required by the State, and the 2008 Stormwater Facility Plan Update. The new water quality design methods meet the State General Permit for Storm Water Discharge Associated with Small Municipal Separate Storm Sewer Systems (MS4) permit requirements. A Stormwater Quality Management Plan was developed in corporation with the 2008 Facility Plan Update to provide stormwater quality technical information and methodology to meet MS4 permit objectives. Information from this plan was then used to develop the new water quality design methods. A summary of the MS4 permit requirements and incorporations are included on pages 2 to 5. Included in this packet is a copy of the draft Standards for Design and Construction 2009 and the Stormwater Quality Management Plan. Chapter 3: Stormwater Design Manual Review In the past three years the City of Kalispell has expanded its boundaries by 3.23 square miles. With growth comes added responsibility for the City to manage stormwater discharges within its boundaries. The State General Permit for Storm Water Discharge Associated with Small Municipal Separate Storm Sewer System (MS4) authorized the City, in 2006, to discharge stormwater to waters of the State. In receiving authorization, the City is responsible for implementing MS4 permit conditions and requirements. The MS4 permit required the City to develop a Stormwater Management Program that addressed six minimum control measures. The minimum measure Post -Construction Storm Water Management in New Development and Redevelopment is the measure prompting the development and implementation of the Stormwater Quality Management Plan and Chapter 3: Stormwater Design Manual. The minimum measure Post -Construction Storm Water Management in New Development and Redevelopment has multiple requirements. The following is a brief description of the permit requirements and correlating City programs that address each condition. Permit Requirement l: Develop, implement, and enforce a program to address stormwater runoff from new development and redevelopment projects that discharge into the permitted small MS4. This program must ensure that controls are in place that would prevent or minimize water quality impacts. Identify how the program will be specifically tailored to the local community, minimize water quality impacts, and maintain pre -developed runoff conditions: a. City's response: Chapters 1 through 5 in the Stormwater Quality Management Plan developed goals and policies, characterized waterbodies in the Kalispell study area, outlined urban development impacts to waterbodies, and characterized Kalispell's annual precipitation events. Permit Requirement 2: Develop and implement strategies that include structural Best Management Practices (BMPs) appropriate for the community. Identify storage and treatment practices such as: 1) wet ponds and extended -detention outlet structures, 2) filter practices, and 3) infiltration practices such as infiltration basins and trenches. a. City's response: Chapters 6 and 7 in the Stormwater Quality Management Plan outline flow control standards, water quality volume standards, and guidance for the selection and design of permanent stormwater quality treatment facilities (i.e. structural BMPs). b. City's response: Sections 6 and 7 in Chapter 3: Stormwater Design Manual integrates the water quality treatment standards and flow control standards from the Stormwater Quality Management Plan and provide design guidelines for BMPs. Permit Requirement 3: Develop and implement strategies that include non-structural Best Management Practices (BMPs) appropriate for the community. Identify policies and ordinances that provide requirements and standards that directs growth to identify waterbodies, protect sensitive areas such as wetland and riparian areas, maintain and/or increase open space, provide buffers along ►N sensitive waterbodies, minimize impervious surface, and minimize disturbance of soil and vegetation. a. City's response: Chapter 3 in the Stormwater Quality Management Plan characterized the waterbodies within the Kalispell study area and establishes an on - site wetland assessment procedure to be performed on new development and redevelopment projects. b. City's response: Section 10 in Chapter 3: Stormwater Design Manual addresses non-structural BMPs by establishing operation and maintenance responsibilities and procedures for new development and redevelopment. Permit Requirement 4: Use an ordinance or other regulatory mechanism to address post -construction runoff from new development and redevelopment projects to the extent allowable under State, Tribal or local law. a. City's response: The standards and policies developed in both Chapter 3: Stormwater Design Manual and Stormwater Quality Management Plan are the regulatory mechanisms that address post -construction runoff for new development and redevelopment. Permit Requirement 5: Ensure adequate long-term operation and maintenance of BMPs. Identify how the long-term operation and maintenance (O&M) of the selected BMPs will be ensured. Ensure that future O&M responsibilities are clearly identified including an agreement between the permittee and another party such as the post -development landowners or regional authorities. a. City's response: Section 10 in Chapter 3: Stormwater Design Manual addresses stormwater management systems operation and maintenance responsibilities and procedures for new development and redevelopment. The Stormwater Quality Management Plan was developed to address and minimize water quality impacts from new development and redevelopment projects. The new policies and standards developed in the Stormwater Quality Management Plan do not correlate to the current stormwater standards in the July 2005 City of Kalispell Standards for Design and Construction. In 2008, City consultants completed the 2008 Stormwater Facility Plan Update. Recommendations developed from the update also do not correlate to the 2005 standards. Chapter 3: Stormwater Design Manual incorporates the Stormwater Quality Management Plan, the 2008 Stormwater Facility Plan Update, and design methods and standards into a single document. This new manual not only addresses the MS4 permit requirements, but will provide planners, engineers, developers, and the general public with procedures and assistance for designing stormwater management systems. The following is a brief section by section overview of the manual: Section 1-Introduction briefly describes the manual's objectives and general requirements. Section 2-Basic Requirements introduces seven basic requirements for new development and redevelopment projects in the City of Kalispell. The applicability of these requirements depends on the type, size, and location of the project. The seven basic requirements are: • Basic Requirement No. 1 — Drainage Submittal • Basic Requirement No. 2 — Geotechnical Site Characterization • Basic Requirement No. 3 — Water Quality Treatment 3 • Basic Requirement No. 4 — Flow Control • Basic Requirement No. 5 — Natural and Constructed Conveyance Systems • Basic Requirement No. 6 — Erosion and Sediment Control • Basic Requirement No. 7 — Operation and Maintenance The trigger for requiring compliance with the basic requirements set in the manual is defined as the addition or replacement of 5000 square feet or more of impervious area. The applicability and design criterion for each basic requirement is further described in this section and the following sections. Section 3-Drainage Submittal describes the contents of a Drainage Submittal and provides a framework for preparing the submittal in order to promote consistency. A Concept Drainage Report package is required at the pre -application stage and before preliminary plat approval. The purpose of the Concept Drainage Report is to demonstrate that the proposed drainage facilities can meet the intent of the manual and are feasible with respect to design, construction, and maintenance. Its contents are similar to those of the Drainage Report. A Drainage Report is required with the project engineers report as defined in the Construction and Design Standards. The purpose of the Drainage Report is to identify drainage impacts resulting from land development activities and determine the improvements necessary to control the increase in stormwater runoff and to treat the pollutants that can adversely impact water quality. The manual provides a list of drainage elements, figures, calculations, and analysis that shall be included in the Drainage Report submittal. Section 4-Geotechnical Site Characterization outlines the minimum requirements for a geotechnical site characterization (GSC). A GSC is used in developing recommendations for stormwater disposal and determining the feasibility of constructing below ground structures (i.e. basements, crawl spaces). Section 5-Hydrologic Analysis and Design provides the tools for estimating peak flow rates and volumes for sizing conveyance, treatment, and flow control facilities. Section 6-Water Quality Treatment Design presents a description of the methodology for water quality design, and incorporates BMP design standards from the Stormwater Quality Management Plan. Section 7-Flow Control outlines the requirements for sizing flow control facilities. It also sets minimum requirements for flow control facilities including discharge rates, setbacks, release points, access requirements, draw down time, side slopes, fencing, landscaping and maintenance. Section 8-Natural and Constructed Conveyance Systems outlines the requirements for conveyance systems including all natural or constructed components of a storm drain system that collects stormwater runoff and conveys it away from structures. Conveyance facilities consist of curbs and gutters, inlets, storm drains, catch basins, channels, ditches, pipes, and culverts. 11 This section also introduces the preservation of Natural Drainage Ways (NDW) defined in the City of Kalispell's 2008 Stormwater Facility Plan Update. New developments shall be designed to protect existing natural drainage features that convey water, store water, or allow water to infiltrate into the ground in its natural location. Preserving the NDW will help ensure that stormwater runoff can continue to be conveyed and disposed of at its natural location. Section 9-Erosion and Sediment Control Design lists the steps for developing a construction site Stormwater Management Plan, also known as an Erosion and Sediment Control Plan (ESC). The City of Kalispell's Construction Site Stormwater Management Ordinance 1600 went into effect May 2, 2007. This section outlines the standards set in the ordinance and suggests BMPs to be used during construction site activities. Section 10-Maintenance, Parcels, and Easements establishes operation and maintenance responsibilities and procedures for new development and redevelopment projects. This section also describes maintenance access requirements, stormwater facilities and systems locations within parcels and easements. 5 2011' Avenue Eas4 P.O. Box 1997, Kalispel4 MT 59903 —Phone (406) 758-7720 — Fax (406) 758-7831, www. kalispell com Memo To: City Council Members Re: City of Kalispell's Standards for Design and Construction 2009 Update Date: September 2, 2009 The City of Kalispell Public Works Department has updated the current Standards for Design and Construction, which became effective July 2005. The draft 2009 Standards for Design and Construction was open for Public Comment from February 2, 2009 until March 2, 2009. Announcements were sent out through fax to over 70 engineers, contractor, and developers. In addition, Public Service Announcements were placed in the newspaper and on the radio. Public Works staff reviewed the comments received and made changes to the 2009 draft document based on some of those comments. A copy of the comments and City responses are included in the packet. As was stated in the initial January 30, 2009 memo to Council, the intent of the update is to incorporate changes in the standards since the last update. Edits were made to each section and a new section, Stormwater Design Manual, was added to the Standards. The Stormwater Design Manual Section incorporates updated stormwater design methods, new water quality design methods (which are required by the State and EPA), and the 2008 Stormwater Facility Plan Update. Pages 2 and 3 outline the list of the major edits and additions made to the current July 2005 Standards for the following chapters: 1. General Provision 2. Design Standards 3. Stormwater Design Manual 4. Standard Drawings Included in this packet for Council to review is a copy of the Standards for Design and Construction 2009, Public comments and City response, and the January Memo. City staff would like the opportunity to review the updates and address any question from Council at the workshop. The following list outlines the major edits to the July 2005 Standards, minor edits are not included in the list. General Provisions: GP -I I Pollution Controls: Changes to paragraph one, added Construction Stormwater Management Permit and details. GP-12 Pavement Restoration: Spelled out new paving requirements to adhere to 2006 Addendum to the Montana Public Works Standard Specifications, Fifth Edition, March 2003. Design Standards: • DS-01 Design and Development Requirements: In the 61h paragraph changed utility easement from 5' wide to 10' wide. • DS-02 Water Systems: Minor engineering items were changed in Water Service Lines, Valve Box, Minimum Pipe Size, Mechanical Joints Restraints, and Warning Tape. • DS-3 Sanitary Sewer Systems: For Sewage Lift Station specified an emergency power requirement and added noise limits. Required an all weather 12-foot minimum width access road to the lift stations. • DS-4 Storm Drainage Systems: Moved entire section to Chapter 3 Stormwater Design Manual. • DS-5 Roadways and Walkways: For Cul-de- Sacs changed five foot (5') boulevard to six foot (6') boulevard. • Added DS-7 Street Lighting: Specifies in detail lighting standards. • Added DS-9 Multiple Use Paths: Outlines design standards, path width, and signage requirements. Stormwater Design Manual (Added Chapter): The following is a brief section by section overview of the manual: • Section 1-Introduction briefly describes the manual's objectives and general requirements. • Section 2-Basic Requirements introduces seven basic requirements for new development and redevelopment projects in the City of Kalispell. The applicability of these requirements depends on the type, size, and location of the project. o Changed the requirement for drainage report from 10,000 SF to 5,000 SF. o Added Redevelopment requirements. o Added Water Quality Treatment requirements. • Section 3-Drainage Submittal describes the required contents of a Drainage Submittal and provides a framework for preparing the submittal in order to promote consistency. • Section 4-Geotechnical Site Characterization outlines the minimum requirements for a geotechnical site characterization (GSC). A GSC is used in developing recommendations for stormwater disposal and determining the feasibility of constructing below ground structures i.e., basements, crawl spaces, infiltration basins. • Section 5-Hydrologic Analysis and Design provides the tools for estimating peak flow rates and volumes for sizing conveyance, treatment, and flow control facilities. • Section 6-Water Quality Treatment Design presents a description of the methodology for water quality design, and incorporates Water Quality Treatment design standards for infiltration basins, infiltration swales, wet ponds, biofiltration swales, dry swales, bioretention facilities, and wetlands. W • Section 7-Flow Control outlines the requirements for sizing flow control facilities. It also sets minimum requirements for flow control facilities including discharge rates, setbacks, release points, access requirements, draw down time, side slopes, fencing, landscaping, and maintenance. o Changed design storm requirement from 10 year 6 hour storm to 10 year 24 hour storm and from 100 year 6 hour storm to 100 year 24 hour storm. • Section 8-Natural and Constructed Convey, s� outlines the requirements for conveyance systems including all natural or constructed components of a storm drain system that collects stormwater runoff and conveys it away from structures. o Added section for the preservation of Natural Drainage Ways (NDW) defined in the City of Kalispell's 2008 Stormwater Facility Plan Update. • Section 9-Erosion and Sediment Control Design lists the steps for developing a construction site Stormwater Management Plan, also known as an Erosion and Sediment Control Plan. • Section 10-Maintenance Parcels and Easements establishes operation and maintenance responsibilities and procedures for new development and redevelopment projects. Standard Drawings: • SD-1 Collector Street: Boulevard width increased from 5 feet to 6 feet. • SD-2 Local Street: Boulevard width increased from 5 feet to 9 feet. • SD -13 Manhole and Valve Box Collar: Added standard drawing detailing concrete collar requirements. • SD-19 Retrofit Pedestrian Ramp: Added standard drawing detailing retrofits for pedestrian ramps. • SD-20 Concrete Curb Inlet Apron: Added standard drawing detailing concrete curb inlet apron. • SD-21 and SD-22: Added standard drawing detailing sewer and storm manhole covers. 3 201 1" Avenue East, P.O. Box 1997, Kalispell, MT 59903 Plione (406) 758-7720 — Fax (406) 758-7831 www.kalispell.com To: James C. Hansz, P.E., Public Works Director/City Engineer Cc: From: Paul E. Burnham, P.E., Assistant City Engineer Re: Revisions to Current 2005 Standards, Cost Analysis Date: October 21, 2009 The Public Works Department has recently proposed changes the 2005 Standards for Design and Construction. As part of these proposed changes, the City held a public comment period from February 1, 2009 to March 1, 2009. The comment period was advertised in the newspaper and a notice was sent to local engineers, contractors and others in the development community. The Public Works Department received several pages of comments and subsequently responded to these comments in a letter to those who had taken time to provide useful feedback. In a work session on September 28, 2009, the Mayor and City Council requested that Public Works staff provide an analysis of the increased costs to the developer or home -buyer due to the proposed changes to the current standards. For the purposes of this analysis, the proposed changes fall into three categories: (1) Chances mandated by State or Federal regulatory agencies. These include changes and additions to the storm water standards. These changes are mandated by the Department of Environmental Quality and are necessary for the City to obtain and maintain a storm water discharge permit from the State of Montana. The developer cannot abdicate these responsibilities to the homeowner or another party. These costs must be borne as a consequence of a developer's or owner's choice to make improvements to a property. As such, these costs are not included in this analysis. (2) Proposed changes that produce no net increased cost or at least a relatively small increased cost to improvements. These changes include modifications to the concrete air entrainment standard, widening the boulevard and placing the back of sidewalk on the property line, manhole covers with the City logo, numerous clarifications to existing standards such as tracer wire location and water service line connections, and the increased utility easement width behind sidewalk. These proposed changes create no net increase in cost and are not included in this analysis. (3) Proposed changes that allow the City to continue long-term maintenance of infrastructure without creating additional costs to existing residents. These changes include the addition of manhole and valve box concrete collars, above -ground storm water detention basins, and placing the depth of culverts to a minimum of two feet to top of pipe. These are examples of proposed changes that will create additional costs for the developer. The following examples address the cost increases resulting from changes to the storm water standards (Example 1) and the addition of concrete collars on manholes and valves (Example 2). EXAMPLE 1 Above -Ground Storm Water Detention Basin In past years, some developments have installed sub -surface detention basins or sub- surface infiltration basins. These are prone to failure and are difficult to maintain. The Draft 2009 Standards put the detention and infiltration basins on the ground surface, where they can be easily monitored, and are often maintained much like a grassed park. Consider the Northview Heights Subdivision Phase 2 for a cost comparison. This development was constructed in 2003 and contains approximately eight acres of land, distributed as follows: 33 Lots- 6.064 Acres Roads - 1.966 Acres Open Space - 0.0 Acres The original plan called for three storm water infiltration sumps, i.e., three four -foot diameter perforated manholes surrounded by washed gravel. Each sump provides approximately 120 cubic feet of storage, or a combined volume of 360 cubic feet. The current cost of similar storm water improvements would be $8,400. These three sumps were constructed in 2003, at which time the Standards provided less direction than the 2005 Standards and the Draft 2009 Standards. These sumps do not provide adequate drainage capacity for the intended service area. The existing improvements, as constructed in 2003, would not meet the current 2005 Standards. In this development, the current 2005 Standards would require storm water detention capacity of approximately 10,900 cubic feet. The current cost to build the detention basin to the 2005 Standards is approximately $19,700. This includes the following costs: Grading and Landscaping $ 7,600 400 feet of 12" PVC pipe $12,000 TOTAL COST $19,700 PER LOT COST (33 lots) $ 597 The Draft 2009 Standards would require storm water detention capacity of approximately 35,600 cubic feet. The current cost to build the detention basin to the Draft 2009 Standards is approximately $29,900. This includes the following costs: Grading and Landscaping $171900 400 feet of 12" PVC pipe $12,000 TOTAL COST $29,900 PER LOT COST (33 lots) $ 906 Three houses in this subdivision have recently installed foundation drains and pumps at a cost of $18,000 per house. Two additional houses have installed smaller drains and sump pumps. These five houses comprise 18% of the total number of existing houses (28 houses have been constructed) in the subdivision, and are now pumping the water to the street and to the sumps. Other homeowners have expressed concern to the Public Works staff that they (the homeowners) may be required to install foundation drains at substantial expense. Theoretically, every house in the subdivision might have to install foundation drains to avoid flooding. This problem would be resolved through the installation of a better functioning storm water collection system, as proposed in the Draft 2009 Standards. The Mayor and City Council asked for the difference in costs for the developer in implementing the 2005 Standards and the Draft 2009 Standards. This is $10,200 ($29,900 - $19,700) for the entire subdivision, or $309 per lot. This is less than the incremental $18,000 per lot that at least three homeowners have invested, and substantially less than the collective $18,000 that every homeowner could possibly be required invest in order to adequately protect their home. EXAMPLE 2 Concrete Collars on Manholes and Valve Boxes The first areas to fail in a roadway are typically adjacent to manholes and valves. This occurs for a variety of reasons; the main reason being that the contractor has a difficult time compacting soils adjacent to these structures and consequently puts inadequate compaction effort into these areas. Many communities require manhole and valve collars to be installed with the initial construction. This stabilizes the manhole ring or valve box and bridges soils that may not have been adequately compacted. These are not a substitute for compaction, but are a measure to stabilize the road surface and manhole ring or valve box. The proposed concrete collars cost around $350 each. There are approximately nine manholes and valve boxes per thousand feet of roadway, or an additional cost of $3,150 per thousand feet. One thousand feet of residential roadway provides frontage for approximately 22 average tots. The additional per -lot cost for manhole and valve collars is $143. This analysis does not account for the off -setting cost savings to repair damage to snow plows and vehicles due to road failures adjacent to manholes and valve boxes that do not have concrete collars. The proposed changes to the 2005 Standards are the result of ongoing observations of existing improvements. These proposed changes represent the recommendations of the Public Works Department staff as well as recommendations from local engineers, developers and contractors. During the public comment period, the Public Works Department staff received fifteen pages of comments from six different companies or individuals in the community. The Public Works Department staff responded to the comments and incorporated many of these comments and suggestions in the 2009 Draft Standards. 201 1' Avenue East, P.O. Box 1997, Kalispell, MT 59903 Phone (406)758-7720 — Fax (406)758-7831 www.kalispell.com To: James C. Hansz, P.E., Public Works Director/City Engineer Cc: Mike Baker, Parks and Recreation Director Sean Conrad, Planning Department Senior Planner From: Paul E. Burnham, P.E., Assistant City Engineer Re: Park Land and Storm Water Land Combination, Initial Meeting Date: November 10, 2009 Staff from the Planning, Parks and Recreation, and Public Works Departments met today to discuss the possibility of combining lands reserved for park improvements with lands reserved for storm water improvements. The meeting centered on the following points: 1) The existing City policy is to develop the two uses (parks and storm water) on separate pieces of ground. 2) City staff propose combining the two uses, insomuch that the combination of uses does not diminish the capacity or adequacy of either use. 3) The current or proposed method of calculating the area of park land for individual development will not be changed by the combination of these uses. 4) The storm water improvements that are similar to park improvements, e.g., grassed surfaces that meet park standards, may be counted as park land. 5) The storm water improvements that diverge from the intent of park land, e.g., wetland areas that are not conducive to pedestrian travel or typical park uses, shall not count toward park land. 6) Minimum park size requirements are not changed by this proposed combined use. The Parks and Recreation Department determines the minimum size of park allowed as a City park. This is typically one acre, but may vary depending on proximity to other parks and other factors. For example, if the development is of such a size that one-half acre of land must be set aside for park land, the Parks and Recreation Department typically requires cash -in -lieu of park land so as to avoid the construction of less -usable smaller parks. In this case, the land used for storm water improvements, though conducive to park land uses, shall not count toward park land. 7) Local examples of this combined use can be seen at Blue Heron Estates, Cottonwood Estates, Northland Subdivision and Mountain Vista Estates. The three departments agreed to propose a change to the current City policy. The mechanism to develop this new policy is through a revision to the current City of Kalispell Subdivision Regulations. I will continue to work with the Planning and Parks and Recreation Departments to create a draft standard to be included in the Subdivision Regulations.