Silver Creek is listed as impaired by the State of Iowa because of its low biotic index. The primary pollutant related causal factors

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2 Section 3: Brief Summary of Proposed Water Resource Restoration Sponsored Project Describe the reasons or the needs for the proposed project (i.e. water quality problem or issue). Do not exceed 100 words. Silver Creek is listed as impaired by the State of Iowa because of its low biotic index. The primary pollutant related causal factors for this impairment are sediment and ammonia. A crushed stone parking lot at the city's Monona Aquatic Center, which is 170 feet from an Unnamed Tributary of Silver Creek and 25 feet from a storm drain input, contributes to the sedimentation of Silver Creek. Silver Creek is a tributary of the Turkey River, which the Iowa DNR documented as having the highest nitrogen and sediment yield/square mile of seven major watersheds that contribute to the Mississippi River. Describe the scope of the proposed project (i.e., specific solution to the water quality problem). Do not exceed 100 words. This project will reshape the sloped hillside where the Monona Aquatic Center parking area and driveway currently exist. Green infrastructure components will be installed to capture rainfall and runoff and to reduce sediment and nutrient transport from the project site and adjoining property. Components will include a permeable paver system in the parking lot, a bioretention cell, a permeable sidewalk, and curb to direct flow and contain the pavers. The driveway, which is currently a steep conduit for overland flow and sediment transport, will be moved to a more level location and the old driveway will be vegetated. Section 3: Qualified Entity Information Is the applicant proposing to enter into an agreement with a qualified third party entity to implement the sponsored project? No Yes Organization: Mailing Address: City, State, Zip + 4 Contact Person: Title: Phone Number: INVESTING IN IOWA S WATER January 2013 Page 2A

3 Section 4: Sponsored Project Cost Cost Category Land and Easements Relocation Expenses Professional Planning Fees Total Estimated Project Costs Costs to be Covered from Other Funds Costs to be Allocated from 1% of SRF Loan Interest Professional Design Fees Professional Construction Fees Construction $15,000 $0 $15,000 $15,000 $0 $15,000 $221,911 $0 $221,911 Equipment Interest During Construction Miscellaneous Contingencies $22,191 $0 $22,191 TOTAL $274,102 = $274,102 Section 5: Attachments Attachments must be submitted with the application. Applications will not be considered complete unless all required attachments are included. Please complete the checklist below. Required Attachment Authorizing resolution passed by the wastewater utility s governing board for the sponsored project application Letters of support from project partners Letter from the wastewater utility s bond counsel indicating concurrence with the sponsored project concept Project conceptual plans, including: Assessment of the impacted waterbody and its watershed with data that supports the identification of the water quality problems to be addressed Discussion of project goals and objectives Evaluation of alternatives considering the unique demographic, topographic, hydrologic, and institutional characteristics of the planning area Description of practices to be implemented with the expected water Attached INVESTING IN IOWA S WATER January 2013 Page 3A

4 quality outcomes Discussion of project locations, land ownership, and any plans for acquiring properties or easements Identification of any other organizations or resources to be involved in the project and their expected contributions Proposed project schedule with major milestones Proposed evaluation procedures and measures If there is a third-party entity involved, the 28E agreement between the utility and the qualified entity Section 6: Acquisition of Property Required Form U.S. ENVIRONMENTAL PROTECTION AGENCY ASSURANCE WITH RESPECT TO REAL PROPERTY ACQUISITION OF TITLE III OF THE UNIFORM RELOCATION ASSISTANCE AND REAL PROPERTY ACQUISITION POLICIES ACT OF 1970 AS AMENDED The (Applicant) hereby assures that it has authority under applicable State and local law to comply with Section 213 of the Uniform Relocation Assistance and Real Property Acquisition Policies Act of 1970, Public Law , 84 Stat (42 U.S.C. 4601) as amended by the Surface Transportation and Uniform Relocation Assistance Act of 1987, Title IV of Public Law , 101 Stat (42 U.S.C note) and 49 CFR 1.48(cc); and certifies, assures and agrees that, notwithstanding any other provision set forth in the application. 1. For projects resulting in the displacement of any person: a. It will adequately inform the public of the relocation payments and services which will be available as set forth in Subparts A, C, D and E of 49 CFR 24. b. It will provide fair and reasonable relocation payments to displaced persons as required by Subparts D and E of 49 CFR 24. c. It will provide a relocation assistance program for displaced persons offering services described in Subpart C of 49 CFR 24. d. Comparable replacement dwellings will be available pursuant to Subpart F of 49 CFR 24, or provided if necessary, a reasonable period in advance of the time any person is displaced. e. In acquiring real property, it will provide at least 90 days written notice to each lawful occupant of real property acquired, stating the date such occupant is required to move from a dwelling or to move his business or farm operation. INVESTING IN IOWA S WATER January 2013 Page 4A

5 2. For projects resulting in the acquisition of real property: a. It will fully comply with the requirements of Subpart B of 49 CFR 24. b. It will adequately inform the public of the acquisition policies, requirements and payments which apply to the project. c. It will make every effort to acquire real property expeditiously through negotiation. d. Before the initiation of negotiations it will have the real property appraised and give the owner or his representative an opportunity to accompany the appraiser during inspection of the property, except as provided in 49 CFR (c)(2). e. Before the initiation of negotiations it will establish an amount which it believes to be just compensation for the real property, and make a prompt offer to acquire the property for that amount; and at the same time it will provide the owner a written statement of the basis for such amount in accordance with 49 CFR f. Before requiring any owner to surrender possession of real property it will pay the agreed purchase price; or deposit with the court, for the benefit of the owner, an amount not less than the approved appraisal of the fair market value of the property; or pay the amount of the award of compensation in a condemnation proceeding for the property. g. If interest in real property is to be acquired by exercise of the power of eminent domain, it will institute formal condemnation proceedings and not intentionally make it necessary for an owner to institute legal proceedings to prove the fact of the taking of this real property; and h. It will offer to acquire the entire property, if acquisition of only part of a property would leave its owner with an uneconomic remnant. References to 49 CFR are citations to Title 49, Code of Federal Regulations, Part 24, published in the Federal Register Vol. 54, No. 40, March 2, This document is hereby made part of and incorporated in any contract or agreement, or any supplements and amendments thereto, relating to the above-identified application and shall be deemed to supersede any provision therein to the extent that such provisions conflict with the assurances or agreements provided therein. (Legal Name of Applicant) By (Signature of Authorized Representative) (Date) INVESTING IN IOWA S WATER January 2013 Page 5A

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10 July$9,$2013$ Patti$Cale<Finnegan$ DNR$State$Revolving$Fund$Coordinator$ Iowa$Department$of$Natural$Resources$ 401$SW$7th$Street,$Suite$M$ Des$Moines,$IA$50309$ Water$Resource$Restoration$Sponsored$Projects$Selection$Committee:$ I$am$writing$to$express$my$support$for$the$installation$of$a$permeable$paver$parking$lot,$ permeable$sidewalk,$and$bioretention$cell$at$the$city$of$monona s$aquatic$center.$as$ coordinator$of$the$turkey$river$watershed$project$and$alliance$since$its$formation$in$2010,$i$ have$worked$with$water$resource$partners$to$conduct$monthly$water$sampling$on$more$than$ 35$tributaries$and$at$52$locations$in$the$Turkey$River$Watershed.$Two$of$those$locations$are$ along$the$unnamed$tributary$of$silver$creek,$and$there$are$no$fewer$than$six$locations$between$ the$project$location$and$the$mississippi$river.$turkey$river$watershed$alliance$members$will$ continue$to$make$this$sampling$data$available$to$interested$partners$and$will$continue$to$assist$ in$the$collection$of$data$downstream$of$the$project$location.$water$sampling$results$are$made$ available$at$ Thank$you$for$your$consideration.$ Sincerely,$ $ $ Brad$Crawford$ Turkey$River$Watershed$Project$$ Northeast$Iowa$RC&D,$Inc.$ P.O.$BOX$916$$$$$$$$101$E.$GREENE$STREET$$$$$$$$$POSTVILLE,$IOWA$52162$ PHONE:$563<864<7112$$$$$

11 t~ )~ C~ORSEY Dt)R:;;~Y &. ~h~i_;ith~'( LIP JOHN DANOS July 17, 2013 VIA ELECTRONIC MAIL State Revolving Fund Iowa Department of Natural Resources c/o Patti Cale-Finnegan 401 SW 7th Street, Suite M Des Moines, IA Re: Water Resource Restoration Project/City of Monona, Iowa Our File No To the Iowa Department of Natural Resources Dorsey &Whitney LLP serves as bond counsel to the City of Monona, Iowa and we have been asked to submit this correspondence to you as an accompaniment to the City's Water Resource Restoration Sponsored Project Application dated July 15, As bond counsel, we have reviewed the application and the provisions of Chapter 384 of the Code of Iowa related to the financing of water resource restoration projects. For purposes of our review, we have assumed that the project (the "Project") described by the City in Section 3 of the application, meets the statutory definition of "water resource restoration project" as set forth in Section (15). Based upon our review, we concur that the City will have legal authority to approve financing for the Project either through the issuance of general obligation debt or sewer utility revenue debt. As is typical, in order to become vested with the legal authority to borrow money, the City will need to follow the procedures set forth in Chapter 384. We hope that you will contact us if you have any questions regarding our correspondence. We are looking forward to working with you on the City's behalf to complete the proposed financing transaction. Sincerely, ~.. oh. Danos...*'s,a. ~~,ar..ir~t::>~+. W~~~--ft~s-we r.z~a.~,.r:,r~a.cv:i~ rc

12 Project(Conceptual(Plans( ( 1) Assessment)of)the)impacted)waterbody)and)its)watershed)with)data)that) supports)the)identification)of)the)water)quality)problems)to)be)addressed.) Thisprojectwilltakeplace withinthecitylimitsofthe communityofmononainclayton CountyinNortheastIowa.The projectislocatedwithin170feet ofunnamedtributary(ut)to SilverCreekandwithin25feetof theneareststormdrainintake. SilverCreekisatributaryto RobertsCreek,whichisa tributarytotheturkeyriver,a majortributarytothe MississippiRiver.Becausethesestreamsandriversareimportantresourcesforthe countyandtheregion,theyhavebeenthefocusoflocal,county,regionalandstate watershedassessmentandplanning.monitoringandassessmentisongoingon UnnamedTributary,SilverCreek,RobertsCreekandintheTurkeyRiverWatershed. UnnamedTributaryandthenaturalplantings thatsurrounditareimportantnatural resourcestothecityofmonona.mononasits onthetopofawatersheddivide,withstorm waterrunoffflowingtofourdifferent watersheds.inrecentyears,thecityhas investedinnativevegetationplantingsalong naturalrunoffroutes.theseplantingsfilter someofthestormwaterrunofffromthe community.theyalsoenhanceasmall communityparkareanexttounnamed Tributary,whichincludesabutterflygarden, communitytrailandgazebo.publicand privateinterestsinthecommunityhave recentlydevelopedlandadjacenttounnamed Viewoftheprojectareafromthebaseof theexistingdriveway.aquaticcenteris inthebackground. Howard Chickasaw Bremer Winneshiek Clayton TributarythatflowsfromMonona,including newcitystreet,acityaquaticcenterand parkingarea.unfortunately,thecrushed stoneentrancetotheaquaticcenterparking areaisslopedtowardunnamedtributary causinggravelandsedimentaroundandat thesitetoerodeandbetransportedbyoverlandflowtonegativelyimpactunnamed Tributarywithheavysedimentation. Fayette Miles Allamakee Project Location Turkey River Watershed Major Rivers Mississippi River 1

13 ThesedimentissignificantnotonlybecausetheCityvaluesthissmallstreamasa beautifulcomponentofarestorednaturalareabutalsobecauseunnamedtributary isatributarytosilvercreek,whichiscurrentlythefocusofaclaytoncountysoil andwaterconservationdistrict(swcd).silvercreekisawarmwaterstream resourcelocatedinoneofthemostintenselycroppedportionsofclaytoncounty. TheSilverCreekWatershedwasincludedinoneofIowa sinitialwaterquality improvementprojects,thebigspringdemonstrationproject.thestreamhasbeen includedoniowa s303(d)listofimpairedwaterssince2002.aquaticlife,which shouldbepresentinsilvercreek,isnotthere.accordingtothetotalmaximum DailyLoad(TMDL)developedbytheIowaDNRforSilverCreek,theprimary nonpointpollutionsourcesaresoilerosionandammonia. TheClaytonCountySWCDispromotingstreamcorridorandsinkholeprotection, andinstallationofbufferpracticesalongsilvercreekanditstributaries. Conservationpracticeshavebeentargetedtoreducesedimentdeliverytothe streamandeducationalprogramminghasincreasedthepublic sunderstandingof waterqualityissues.claytoncountyswcdandidals,recognizingthesoilerosion andrunoffissuesthisprojectwilladdress,havebeendirectlyinvolvedwith planninganddesignforthisproject. TheSilverCreekWatershedProjectissupportedinpartbytheIowaDepartmentof AgricultureandLandStewardship,DivisionofSoilConservation,throughfundsof thewaterprotectionfundandwatershedprotectionfundand,bytheiowa DepartmentofNaturalResourcesthroughagrantfromtheU.S.Environmental ProtectionAgencyundertheFederalNonXpointSourceManagementProgram (Section319oftheCleanWaterAct).TechnicalassistanceisprovidedbytheU.S. DepartmentofAgriculture,NaturalResourceConservationService. TheSilverCreekWatershedProjectissupportedinpartbytheIowaWatershed ImprovementFundadministeredbytheIowaWatershedImprovementReview BoardandwithsupportfromtheIowaDepartmentofAgricultureandLand Stewardship,DivisionofSoilConservation. SilverCreekandthestreamitflowsinto,RobertsCreek,bothhaveinXstream sinkholes,whichactasconduitsforsurfacewatertogoundergroundandinteract withgroundwaterbeforereemergingmilesawayinspringsincludingthelargest springiniowa,bigspring,wheretheiowadnrmanagesastateofiowafish Hatchery. TheTurkeyRiverWatershed(TRW)isthelargerwatershed,1,084,086acres,that encompassesut,silvercreek,robertscreekanddozensofotherstreamsfrom throughouttheregion.accordingtotheiowadepartmentofnaturalresources (IDNR),waterqualitymonitoringconductedinseveneasternIowariversduring 2008floodsrevealedtheTRWcontributedthehighestnitrogenandsediment yield/squaremileofwatershedtothemississippiriverofallsevenrivers.thestudy comparedtheturkeyrivertothemaquoketa,cedar,iowa,wapsipinicon,skunk 2

14 anddesmoinesrivers.asevenxyearidnrstudyofseventyxsixstreamsfoundthat theturkeyriverwasthefourthhighestcontributorofsedimentduringnormal flow.evenwithoutthesestudies,waterqualityandquantityissuesinthetrware wellknowntocommunitymembersalongtheturkeyriverandthroughoutthe watershedwhereseveralcommunitieshavebeendevastatedbyfloodwatersand thesedimentthosewaterscarry. RecognizingthefloodingandwaterqualityissuesintheTurkeyRiverWatershed (TRW),twentyXthreecommunities,includingMonona,sevenSoilandWater ConservationDistrictsandfiveCountyBoardofSupervisorsrecentlyformedthe largestwatershedmanagementauthority(wma)iniowa.thethirtyxfivetrw WMApartnersarenowworkingtogethertodevelopaplanforhowtheywillreduce floodingandimprovewaterqualityinthe TurkeyRiverandacrosstheTRW.Monthly watermonitoring,paidforbytheiowadnr andusfishandwildlifeservice,is conductedatover50sitesinthetrwtohelp thelocalandstatepartnersbetter understandhowtoaddressandmanage waterqualityandhydrologicissues throughoutthewatershed.monitoring parametersincludetransparency,which helpsthepartnersunderstandthesediment loadcarriedbythestreamsandtheriver.the IowaFloodCenter(IFC)isalsocompleting complexhydrologicmodelingoftheentire TRW,whichisoneoffourwatershedsin IowatargetedbytheIFCforhydrologic modeling,includingtheproposedproject area. Specificuses,classificationsandimpairments foreachofthestreamsassociatedwiththis projectincludethefollowing. UseandClassifications o Unnamed)Tributary)(ofSilverCreek)) )Unnamed)Tributary)is)a)Class)A1) water)body)and)a)class)b)(ww1)) water)body.)it)is)directly)impacted) by)siltation)and)runoff)from)the) project)site,)as)it)is)only)170)feet) from)the)project.)(theprojectsiteis only25feetfromtheneareststorm draininput.))thisstreamislistedas ImpairedbytheStateofIowaforits Silver Dove Ave Unnamed Stream 3 Luana Roberts Dalmation Ave Legend Unnamed Stream - Silver Creek Watershed Silver Creek Turkey River Silver 172nd St. Project Location Unnamed Stream - Silver Creek Watershed Silver Creek Watershed City Water Sampling Location Elkader Miles Monona Farmersburg Roberts 206th St/B65 (St. Olaf) St. Olaf Roberts Creek Roberts Grape Rd

15 designateduseofaquaticlifebecauseofhighlevelsofammoniaand impairedforitsdesignateduseofprimarycontactforrecreationbecauseof highlevelsofbacteria. o Silver)Creek) )This)stream)is)a)Class)A1)water)body)and)a)Class)B)(WW2).) This)water)body)is)impacted)by)the)siltation)and)runoff)from)the)project) site)during)high)flow.silvercreekislistedasimpairedbythestateofiowa foritsdesignateduseofaquaticlifebecauseoflowbioticindexanditisalso Impairedforitsuseofprimarycontactforrecreationbecauseofhighlevels ofbacteria.accordingtotheiowadnrtotalmaximumdailyload(tmdl) preparedforsilvercreek,amethodcalledstressoridentification(si)was usedtodeterminetheprimarystressorsinsilvercreek.thesiprocedure relatesimpairmentsdescribedbybiologicalassessmentstooneormore specificcausalagents(stressors)andseparateswaterquality(pollutant) impactsformhabitatalterationimpacts.the)si)determined)that)the) primary)pollutant)related)causal)factors)in)the)silver)creek)water)quality) impairment)are)sediment)and)ammonia.therearesinkholesinsilver Creekthatinfluencegroundwaterandcouldthereforeinfluencenearby shallowwells,whichareasourceofruraldrinkingwater o Roberts(Creek( (Silver(creek(empties(into(Roberts(Creek,(which(is( designated(class(a(and(class(b((ww2).robertscreekisnotcurrently impairedbutisbeingmonitoredtodetermineimpairmentbytheturkey RiverWatershedAlliancewithfinancialassistancefromtheIowaDNRand USFishandWildlifeService.TherearesinkholesinRobertsCreekthatcould beinfluencingnearbyshallowwells,whichareasourceofruraldrinking waterandhavebeendocumentedtotransportwatertobigspring.big Spring,whichisIowa slargestspring,isthesourceofwaterfortheiowa DNRsBigSpringHatchery. o TurkeyRiver The(Turkey(River(downstream(from(this(project,(is(a(High( Quality(Water(and(a(Class(A1(Primary(Contact(recreational(water,(Class( B((WW1)(and(Class(HH,(for(fish(consumption.TheTurkeyRiveris Impairedbecausehighbacterialevelsdonotsupportitsprimarycontact designation.according)to)the)iowa)department)of)natural)resources) (IDNR),)water)quality)monitoring)conducted)in)seven)eastern)Iowa)rivers) during)2008)floods)revealed)the)trw)contributed)the)highest)nitrogen) and)sediment)yield/square)mile)of)watershed)to)the)mississippi)river)of) all)seven)rivers.thestudycomparedtheturkeyrivertothemaquoketa, Cedar,Iowa,Wapsipinicon,SkunkandDesMoinesrivers.A)sevenQyear)IDNR) study)of)seventyqsix)streams)found)that)the)turkey)river)was)the)fourth) highest)contributor)of)sediment)during)normal)flow.theturkeyriveris heavilyutilizedbyresidentsandvisitorsthatenjoyfishing,canoeing,tubing, kayakingandotheractivitiesthatbringthousandsofpeopleintocontact withthiswaterbodyannually.theturkeyriverisapproximately33miles downstreamoftheprojectsite. 4

16 TheImpairedWatersStatus,Section305(b)statusandprotectionofgroundwater statusforeachofthestreamsandriversdownstreamofandpotentiallyimpactedby theprojectaresummarizedinthetablebelow. Water(Quality(of(Receiving(Waters( Indication(of(Water(Quality(( A.(Integrated(Report(of(Impaired(Waters(Status( Unnamed SilverCreek Roberts TurkeyRiver Tributary Creek 4a,4b,4c,4d,or5a 5a 5a 5a 5b 5p ( B.(Section(305(b)(status( Aquatics(or(fish(consumption(or(drinking(water( Fullysupporting Partiallysupporting X Notsupporting X X Notassessed X Recreation( Fullysupporting Partiallysupporting Notsupporting X X X Notassessed X ( C.(Protection(of( Groundwater( Resources( Groundwater(Category( Wellheadprotectionarea forpublicwatersupply Unconfinedaquiferthat servesasadrinking watersource Othergroundwater X(inXstream X(inXstream protection sinkholes) sinkholes) ) ) ) ) 5

17 2) Discussion)of)Project)Goals)and)Objectives) ) Thisprojectwillrestorethephysical,chemicalandbiologicalintegrityofUnnamed TributaryandSilverCreek.ItwillreduceloadingofsedimentintoUnnamed Tributary,SilverCreek,RobertsCreekandtheTurkeyRiver,therebyreducingthe loadingofaparameterthathasbeenidentifiedasanimpairmenttothereceiving waterorwatershedasidentifiedthroughthetotalmaximumdailyload(tmdl) process.itwillalsoreducestormwaterrunoffanderosionfromcityproperty.the CityofMononawillreshapetheslopedhillsidewheretheMononaAquaticCenter parkingareaanddrivewaycurrentlyexist.itwilltheninstallgreeninfrastructure componentsthatwillcapturerainfallandrunoff,andreducesedimentandnutrient transportfromthepropertyandadjoiningpropertythatdrainstoandthroughthe projectsite.componentswillincludeapermeablepaversystemintheparkinglot andadjacentsidewalk,abioretentioncellandacurbthatwilldirectanyrunoffand containthepermeablepavers.thedriveway,whichiscurrentlyasteepconduitfor overlandflowandsedimenttransport,willbemovedtoamorelevellocationand theolddrivewaywillbevegetated. Project)Goals:) ) Primary)Project)Goals:)) Restorephysical,chemicalandbiologicalintegrityoftheUnnamedTributary andsilvercreek.unnamedtributaryisdirectlyadjacenttotheprojectsite. ReducesedimentloadingtoUnnamedTributarytoSilverCreek,whichhas beenidentifiedasanimpairmentthroughthetmdlprocess. Reducethequantityofandimprovethequalityofstormwaterrunofffrom citypropertyintothewatersofthestate. Secondary)Project)Goals:)) HelprestorehealthyaquaticsinSilverCreek Helpprotecttheshallowdrinkingwateraquifersthatareimpactedby waterqualityinsilvercreekandrobertscreek. HelptheTurkeyRiverWatershedManagementAuthorityreducestorm waterrunoffto,andimprovewaterqualityin,theturkeyriver. ServeasanexampletotheTRWWatershedManagementAuthorityand 22otherparticipatingcommunitiesofhowinnovativeapproachesand greeninfrastructurecanbeusedbysmallcommunitiesandhow assistancefromthesponsoredprojectprogramcanbeusedtoreduce erosionandrunofffromamunicipalityintheturkeyriverwatershed. Objectives:)) o Increaseinfiltrationattheprojectsiteandfromadjacentproperties. o Reducesedimenttransportfromtheprojectsiteandadjacent properties. 6

18 Methods:) o Reducepeakdischargeratefromtheprojectsiteandadjacent properties. o Reducestormwaterrunoffvolumefromtheprojectsiteandadjacent properties. o Install1,835squareyardsofpermeablepaversystemintheparking areaofthemononacityaquaticcenter. o Install103squareyardsofpermeablepaversidewalksystematthe MononaCityAquaticCentersite. o Installa200squareyardbioretentionareatoabsorbsurfacedrainage fromtheaquaticcenterandadjacentroadwaytoreduceoverlandflow anderosion. o Installcurbtocontainthepermeablepaversanddirectrunoff. o Movethedrivewayfortheparkingareaawayfromthesteephillside toamorelevellocationandvegetatetheolddrivewithperennial vegetation. 7

19 8 3) Evaluation)of)alternative)considering)the)unique)demographic,) topographic,)hydrologic)and)institutional)characteristics)of)the)planning) area.) Severalalternativeprojectcomponentsandoptionswereexploredandconsidered bythecityasthisprojectwasdeveloped.thecityadministratormetandconsulted withpersonnelfromtheclaytoncountysoilandwaterconservationdistrict,iowa DepartmentofAgricultureandLandStewardship,NortheastIowaResource ConservationandDevelopmentInc.andFehrGraham,aprivateengineeringfirm. Partnersconsideredtheinstallationofapondorwetlanddownstreamofthe proposedprojectareaandaroughdesignwasdeveloped.however,after consideringtherelativelysmalldetentionarea,theneedforexcavationinorderto createawetlandofsignificantsize,andcomplicationscreatedbyunderground sewerinfrastructure,partnersagreedthatthepermeableparkinglotprojectwould bemorecosteffectiveandahigherpriority. StreambankstabilizationoncitypropertyalongUnnamedTributarywasconsidered asawaytoreducesedimentation.however,thesoilandwaterconservation Districtsurveyedthestreamandidentifiedonlyonesmallareathathadanystream bankerosion.theydeterminedthat Whatneededtobedonewouldnotbe consideredapriority. WithassistancefromIDALSpersonnel,theCityidentifiedone sitethatwasappropriateforinstallationofabioswale.however,thesitewasnot withinthesilvercreekwatershedsoitwouldnothavehelpedwiththeimpairment insilvercreek. Permeablesurfacingoptionsfortheparkinglothavebeenresearched.Thesehave included:permeablepavers,perviousconcrete,andporousasphalt.permeable pavershavebeenchosenasthebestproductforthisprojectduetolongdesignlife ofthepaversrelativetotheotheroptionsandassociatedlowermaintenance,high infiltrationrate,andrelativeeaseincleaning.thelowstrengthofperviousconcrete wasseenasanegativeforthisprojectastherewillbeheavyloadingfromwaste removalandpoolsupplyvehicles.paverswilltendtohavealowertemperature duringsunnysummerdaysrelativetoporousasphalt,whichwillbeadvantageous tothosechildrenusingtheaquaticcenterwhoarenotwearingadequatefoot protection.thepositivecommentsofpermeablepaversinstalledinthecityofwest UnionandCharlesCitywereinfluential. 4) Description)of)the)practices)to)be)implemented)with)the)expected)water) quality)outcomes.) Thisprojectwillreshapethecrushedstoneparkingareaanddrivewaycurrentlyat thecityofmononaaquaticcenter.thesiteexperiencessignificanterosionduring rainfalleventswhensedimentxladenrunoffdischargesuncontrolledfromthesite directlytoanunnamedtributaryofsilvercreek.theproposedprojectwillsurface theparkinglotwithpermeablepaverstosignificantlycontroltherunoffand improvewaterqualitybyeliminatingsedimentdischargeandcleansingany

20 controlledrunofffromthesite.abioretentionareawillbeconstructedtotreat existingdrainagefromaportionoftheaquaticcenterandanadjacentstreetrightof way.apermeablesidewalkwillbeinstalledadjacenttotheparkingarea.curbwill beincorporatedtodirectanyrunoffthatmayoccurduringheavyrainfalleventsand containthepavers.thedriveway,whichiscurrentlyasteepcrushedrocksurface wheresurfacerunofftransportsandpicksupsediment,willbemovedtoamore levellocationandtheolddrivewaywillbevegetated. Theprojectsite/parkingareaiscurrentlycomprisedof0.50acresofcrushedstone. Permeablepaversurfacingisproposedfortheentire0.50acres.Thereisan additional0.13acresadjacenttotheprojectsitethatdrainsontotheproject site/parkingarea.currentrunofffromthecrushedrocksurfaceoftheparkingarea issubstantial. Annualrunoff=76,400cubicfeet=571,500gallons Peakflowfor100yearstorm=5.8cubicfeet/secondor2,600galperminute (includesoffsitecontribution) Futurerunofffromthesitewillbeslowedandmanaged: Becausetheslope,layout,engineeringandphysicalstructureofthesitewill bedevelopedtoencourageinfiltration,moreoftherainfallwillinfiltrateinto thesubsoilatthesitethanbeforetheproject.however,becausetheproject sitehasclaysoils,infiltrationrateswillnotbehigh. Thesystemwillbedesignedtofullyholdthe100Xyearrainfall.Theoutlet fromthepermeablepavementsystemwillbesmalldiametertilelinewitha valvetofurthercontrolrunoff.thecitywillbeabletocontroltherelease rate,keepingthemaslowas0.02cfsor10gallonsperminute.forexample,a 2 rainfallwoulddrainoutinapproximately48hoursversestheexisting conditionwheredrainageisconcentratedandalmostinstantaneous. Runofffroma0.45Xacreareaofgrassandnearbycrushedstonestreetwill draintotheproposedbioretentionareafortreatmentandflowreduction. Expected)water)quality)improvements:) Permeablepavers(parkingareaandsidewalk): Reductionofsiltandcrushedstoneresiduecontributedtothestreamfrom thesite. Significantreductionintherainfallrunoffrate. Coolingofrainfallrunoffduringwarmseason,withdischargetemperatures beingclosertothenaturalgroundtemperature. Cleansingofrunoffincludingoils,antifreeze,rubber,metals,andother petroleumproductsasitpassesthroughthecrushedstonebase. Infiltrationintonativesoils Bioretention: Cleansingofrunoffthroughamendedsoilsandplantings. Infiltrationintonativesoils. 9

21 Reducedrunoffrate. 5) Discussion)of)project)locations,)land)ownership,)and)any)plans)for) acquiring)properties)or)easements.( TheprojectiswithinthecitylimitsoftheCityofMononaandtheCityownsthe property.noeasementsorpropertywillneedtobeacquired.alliantenergyand BlackHillsEnergyhavebeencontactedregardingrelocationoftheirinfrastructure thatconflictwiththeproject. 6) Identification(of(any(other(organizations(or(resources(to(be(involved(in( the(project(and(their(expected(contributions.( TheCityofMononawillberesponsiblefortheimplementationoftheproject.Other organizations,includingclaytoncountysoilandwaterconservationdistrictand NortheastIowaResourceConservationandDevelopmentInc.(RCD),willbe assistingwithcoordinationandimplementationofmonthlywatersamplingatfour sitesinthesilvercreekwatershedaswellasoneatthemouthofrobertscreek whereitemptiesintotheturkeyriver.thesamplingoccursonthefirstwednesday ofthemonth,eightmonths/year.eventsamplingoccurswhenfeasible.amapof thesewatersamplinglocationsisincludedforreviewearlierinthisapplicationnext toinformationregarding UsesandClassifications.Althoughthesepartnerssample forseveralparameters,thespecificparameterrelatedtothisprojectis transparency,whichismeasuredinthefieldusingaqualityassuranceprojectplan. (Note:Temperature,pH,chlorideandDissolvedOxygen,Nitrogen,Ammonia, PhosphorousandBacteriawillalsobemeasured.)( 7) Proposed)project)schedule)with)major)milestones.) FinalDesign,Specification,andContractDoc.Preparation: NovXDec2013 PlansDistributedtoContractors: January2014 BidLetting: February2014 StartofConstruction: April2014 CompletionofConstruction: June13,2014 8) Proposed(evaluation(procedures(and(measures.( Watermonitoringfortransparencyattheprojectsiteswillbeusedtodetermine changesinsuspendedsolids/turbiditythatwouldberelatedtotheproject.the transparencyofthewaterflowingoffthesitewillbemeasuredduringarainfallat thestormwaterintakebeforetheprojectandthenaftertheprojectiscompletethe transparencyofthewateratthestormintakeand/orsiteoutflow.(note:itis possiblethattherewillnotbeanyoverlandflowfromthesiteaftertheprojectis completed.) Watermonitoringfortransparencyaswellasseveralotherwaterquality parameterswillalsobeconductedbeforeandaftertheprojectonunnamed Tributary,SilverCreek,RobertsCreekandtheTurkeyRiverdownstreamofthe projectsitebythepartners.thismonitoringwillnotonlyhelpthecityofmonona 10

22 evaluatethewaterqualitybenefitsoftheproject,itwillprovideanexampletothe other22communitiesandpartnersinvolvedwiththeturkeyriverwatershed ManagementAuthority(TRWMA)regardingreductioninrunoffandsedimentation andpollutantsasrelatedtoinstallationofthepracticesincludedinthisproject.this project,asitisproposed,waspresentedinjunetothetrwmaasanexampleof whatmononaisdoingtoimprovewaterqualityandreducefloodinginthetrw. AvisualassessmentoftheprojectsiteandtheUnnamedTributaryriparianareawill alsobeused.thesitecurrentlyhasvisiblesheetandrillerosionaswellasgully erosionwithlossofsedimentandgravel.thebutterflygarden,whichisinthe riparianareaofunnamedtributary,hasvisibledepositsofsedimentandgravel fromtheprojectsite.theprojectsiteandthebutterflygardenwillbeinspected beforeandaftertheprojectisimplementedtoassesssedimentandgravel deposition. ( 9) 28e(Agreement(( TheCityofMononaownsthispropertysoa28eagreementisnotneeded. 11

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