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Finding of No Significant ImpactJune 13, 2013 As required by state and federal rules for determining whether an Environmental Impact Statement is necessary, an environmental review has been performed on the proposed action below: Project Willows Subdivision Stormwater Improvements Location City of Kalispell Project Number WPCSRF Project # C307191 Total Cost $5123350 The City of Kalispell, through a May 2012 Preliminary Engineering Report (PER), prepared by Morrison - Maierle, Inc. has identified the need to improve the storm water outfall pipe, the outfall structure to the Stillwater River and collection and detention systems for the Willows Subdi ' vision, which is located in southeast Kalispell. Flooding is occurring within the Willows Subdivision due to the undersized outfall pipe from the detention pond to the Stillwater River and improvements to the detention pond are necessary to stabilize the steep banks, which are sloughing into the pond and causing sedimentation and blockage of the outlet pipe. Moreover, the sediment that should be retained in the detention pond is discharging to the Stillwater River. Storm water flowing through the detention pond and the outfall pipe to the Stillwater River originates from the Willows Subdivision and off -site sources. A hydraulic analysis indicates that the outfall pipe cannot pass the 1 0-year storm even without causing flooding in the Willows Subdivision streets. Additionally, erosion of the river bank is occurring at the outfall structure of the existing pipe. The proposed improvements include reconstructing the detention pond, constructing approximately 1,260 feet of new 18" diameter outfall pipe from the detention pond to the Stillwater River, including a new outfall structure for the new and existing pipe outfalls, and installing two mechanical storm water separators within the collection system. The proposed 18" diameter pipe from the detention pond to the Stillwater River would provide the increased storm water capacity to eliminate flooding within the Willows Subdivision. The mechanical storm water separators will remove sediment, oil, and floatables from the storm water running off the streets in the Willows Subdivision. The improvements will be designed to meet the City of Kalispell standards and once the system is in operation and accepted by the City of Kalispell, the city will take over the operation and maintenance of the storm water system. Federal and State grant/loan programs will fund the project. Environmentally sensitive characteristics such as wetlands, floodplains, historical sites, and threatened or endangered species are not expected to be adversely impacted as a result of the proposed project. No significant long-term environmental impacts were identified. An environmental assessment (EA), which describes the project and analyzes the impacts in more detail, is available for public scrutiny on the DEQ web site (http://www.decl.mt.gov �ea.mcrw) and at the following locations: Jerry Paddock, P.E. Department of Environmental Quality 1520 East Sixth Avenue P.O. Box 200901 Helena, MT 59620-09011 -jr)a-ddock@mt._ ov Keith Haskins, P.E. City of Kalispell 201 First Avenue East Kalispell, MT 59901 Comments on the EA may be submitted to the Department of Environmental Quality at the above address. After evaluating substantive comments received, the department will revise the environmental assessment or determine if an environmental impact statement is necessary. If no substantive comments are received during the comment period, or if substantive comments are received and evaluated and the environmental impacts are still determined to be non- significant, the agency will make a final decision. No administrative action will be taken on the project for at least 30 calendar days after release of the Finding of No Significant Impact. Sincerely, Todd Teegarden, Bureau Chief Technical and Financial Assistance Bureau "M 'ANA FLATHEAD C0TJ\.l'TY AFFIDAVIT OF PUBLICATION RICHELLE �ROONEV BEING DI.Jl....,Y SWORX DEPOSES AND SAYS", THAT HE IS THE LEGAL -(LE'RK OF Tl*"�' DAILY INTER LAKE A DAI LY NEWSPAPER OF GE.NERAL CIRCLI". LATTOK, PRINTED AND PUl3.L,l,Sl-lE-D N THE CITY OF KAL ISPl*_-,-,lL, IN THE COUNTY'Or- FLAI�HEAD, STATE OF MONTANA A0N.'D '17HAT NO, .20910 LEGAL. ADVERTISMEN'T WAS PRINTED AND 't -'E OF .PL`*f3l,',JS'HED IN Tl_-lE" t...,ARANDI N "'RYCOPY THEREO"t,"' SAID PAPER:, AND T\N' EACH AND EVI'll, ON THE DATES Of June 19,20.13, "ERN 14(.] R T' 1` k P 4 J . ) .. 1-TE Al-...�OVE PRINTINQ DOES N(,,)T EXCEED THEMINIMUM C'10 IN G R AA .."I"E C H.ARGEl) "1"0, AN YOTHER ,j -ADVER111,3ER, FOR TFIE SAME PUl"BlACATION., SE"I"'I"N'THE. SA. -ME Sl E"I"YPE Pt"'I'll"51 1"R`k ; "l-ED FOR. THESAME NUMBER OF fNSERTION'S.. IL St�bsc.rlib.cd and, swcu-n to Before me (his'June 19,201-'43. C 'Oss Notary'Pubt' le -for the State ofN.4ontana lZe.siding.in- Kzilispell 1. .. * I 1 0. 1 My canimlissit.)-11. Lt,XPICM-1.81. -9/ -717 � �Zv o' -'y A '00DL'ic 'foy state Expires . ..... . .... . No. 20910 June 13, 201'Z 41� FINAL_ -F-INDING OF SIGNtFICANT IMPACT 4i�'. TO ALL. INTERESTEd %4" GOVERNMENTAL AGENCI AND PUBLIC GROUPS' As reqvired by state and fadet, rules for d6teimining vMeth'er' a $ Ehvironmefital imp a w6m is nerossary,. an environ m.., reVle�i'has been performed the propoie'd adtlon below, 'Willows Subdivision Stormwaterfl� orovements Lo�tkfion City of Kalispell 'P(oloct �Number WP0 SAF Projeo: # C-307191 Total Cost 's5f2t360 The Cityof Kalls"110 h R 1uprn May 2012 pt�ellin P"n If J."nglOsering, Report (PER, 'i FrapArod by Morrison - Maiede,zi nc, has 166infifled the n titz., mprove - the storm. water outfij( " glpej the outtail, strUctUre to the,�11 fillwater Over and collecti,"', and detention systems 'tor th`,,� Willows Subdivision, which. located In- southeAst Kalispell -P)66&� Is, occurring vithin th Willows Subdi4lon due to th underslZed oUftl oipe I= detention., pond to the StIllwate," and Improvamentsto, th do 06n, po6b are neq - mry t, h, tbabiliz6 t1ii st*,banks, whid are .,sloughing Jnto the, pond an causing' s6dimiantatl6n an&,,,., blo�*-e of the outlet pj Mori6�er', 'the sediment, 4 should be re'Wned in th detention pond is discharging, the $6164tir AN' er, Storni- wate flow1no thrbuoh the d o) atenO pond -and the, outfall,pi Ah I pe to t Stillwater RIver oftinates fro the Willows SuNivislon an4i off-SIto , sources,, A hydrqulli� , analysis Indid4t" " that the qWaiti`� pjpe' -cannot pass the 1 6�9 stiorm even 'w4thout pausing,',li i in the wilowil'_'�_, SUbdiv slon stredis, Additional erosion of the river '' ba' Tlklly! ,�ourrl struoturll�, 'the %at,the outiall Ong pipe. Tbe proposed 'improvements, ioclode reconstructing tho, -detention �nd, constructina' ar�d, late 26P to* of, neW fameter outfall pipe "rrr' the, detention pond - to the $011w"' atOr River, including a. neW outtall Wucture for ihe now and exjWnq pipe outfills, and insWIN two mechanical storM water separatm within the Collection system. 'The , proposed 181, dliamew pipe -ftom th&, dotenflo, I n - pond to the Stillwater - River would proVide the increased storm w r', capacity to ellminat6 floodln Wlthln� the 11 "1 "T'he Wllowsf $ubdivit, 0 � mechgnical' storm water s904rators- will remove sediment, ,oili and floatablet from' the S't' ' orm water runnirig' Off the stre0is in the Willows Subdivislop. The improvements will t* designed. to: .-Medt the C4 Kalispell, 'y of standards anc! once the system is 4n operation and accepted b It the City O'Kalispell. the alty wi 11 *4 -over the operation' and maintenance rit the storm water system, Raderal and' State grant/loan- VoTrams will fund. the prqj6ct4:, tonmentally sensitive." c haracte'ristics such as wetlands,,., floodplains, histort'dal edes, ancL or endangere0i =Ids are not expWed lo be,.,, �selylmpactsd as a result, ot" the propowO projo;L, N01, sighificAnt long -ter m environmental impacts were-�' identified, An anAronmertal assessmentl (EA) whidh descdbe6 thd�prqjoct.�� and Analyzes the impacts In-,i, more detail is available forrF, pub0c: scrutiny on the DEQ, web, site (h ,#www.deq-rnt.gov/eamcpx)1 �M7 at,theJollowinii. locations-, 4 Jer,ry Paddock. P,E... Depq1miant of finvironmentall Qualkl! , I ` 1520 -Fiast Sixth Avenue 10,,O� Box 200901 HelenaNT 69620-09011 ipaddiock@mt.gov Keith Hasklns,,,.P1.,E., Qi Kali s0eill 201 First. Avenue Ea6t Kalispell,,. MT 6990-1 Comment6 o n the' EX may be submtttOd 10,lft 06padment C Erwitonmental Ouality- at the;7� above., address� After evaluatin substantive comments the diipartm6rit Will revise tho'. environmental atsess"ht 0�'�, determine- If an onvironmentalZ" impact staterneot1s necessary, ItI, no substantive tomments are��_!', received durlrjq the commetitA period� ot if substantiv oomments are rw,elved anOZ, evaluated andthe environmentail.'I 'Impacts are $011 determined be, noh-sionificant, the agency, will make a final decision., N&' - adminis1ratNe action will taken otl the proM,,I. for At I 30:calondar daysafter release the Finding of No Significa Impact, Sincerol. , .1W Todd 1-e"arden 1"odd Te'e _'ed' �gs en: Bureau Chief Tecbrilcal' 1�_,4410! Rinaticial Assistance Bureau Junfi 19,,, 20'"33