01/21/2004 Env Bd Packet - Laserfiche WebLink

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Minnesota Pollution Control Agency December" 'PI, 200:3 Mr. Michael Grochela' _ City of Lino Lakes fi00 Town Center'i'i Lino LakesY.MN. M914 BE: 'The I.egacyat3V01. de Plgel?ev,4000100t Dear =Mr. Grochafa 113v4raltra. vlm ental sanent W eet ( W) to ill Lemay t Woo is Edge Dcvetopment'haes been reviewed lr Minnesota'Pollution Conlml,Agency (14CA) ataft This commxitletter addresses ashen of concern 10 MPGA seaff'revtewzn&te PA'W,and is suirmtttad for onsiderattwt by lh a City of Lino I s,. the- responst'ble Bovernmaital unit,.in dcctdin6-whether sn Environme0 al it ipact Statenrcut; • should prepared'on heproject. It does not constitute eppravalby the MPCA ofanyor all elements of . the project for the purpose of'pending arfuhitt14 niiittletion(s)by tree tPCA. We lave atteMpted to adentrfy inct consult with (moult' witfinfemeited program rt0 identify the Mme" .;pets that maybe reegluired.. , .Additional comthents orre lutists for` information` maybe aubmitted-in the future.to address specific issues related to the 4OyeloPorot ofsucb permits) Ultimately, 41W the responsibility oftlic pmjeci to secure any.required permitsand to comply with any requisite perinit coeiditions. T'fiefollowing,conunenb are made. forryou ruse in; revising the draft YAW, 'tem. :47h, This section should i flciksde the `needio co t* w tih: to lOcAiVhaw.11 Stormwater,Perm* fihe;EAW states "Following development ofthe'proposed site, stone water will" be: treated through infiltration in open'spaees or 6,i1MbeMfbeeetieMber technology and tbrnughretetttton ponds that will rneet"Netional- U Urban Runoff Program tN[ RP) guidelines, .." The Phase 11 :NPDPSpernpt- contains requirements for sizing amtmitl ,velocities that tub pond must achieve 4n -order to be lir compliance with the permit. These r*IilitO*011 are..not the same ltelA P. requircmcnts and need 10 'be incorpoiratcd in torthe pond design.' Thank y o u f o r t h e o p p o m t t m i t y to.rev e ) . the B A W Should.youleimany;que4ione Ai uttb s lead r. please contact tin at 0631)196 -7795 Rincerely, 443475. Kellyyt 1arvey *eject Manager atwtis nd Environmental Review Section Regionpt AtMkOnrpentel ':ltmegetneet.Divklika GuMO 520:1 atayette Rd. M •SaintPeul, MM 55100410 ; (612) 2964300 (!aks); (612) 282-5332 (i7Y1 www.pcettbr ye. St. Patel • B[nefd .Detioltl '10e• loth • Mankato• UAerahat • stef• Mom! !!!dal ew ior4.4 00erwt* VwerfrOifte *wwnoprwniSiooionPr! rdaaM RESPONSE 1 The permanent storm water management system will consist of a combination of wet sediment basins and infiltration systems (underground chambers and ponds) to meet the requirements of the NPDES Permit No. MN R100001. Furthermore, the project has been designed to meet the Rice Creek Watershed District infiltration requirements of 0.34 inches of runoff and dead storage requirements of 2.5 inches of runoff. A large portion of the runoff from the site is directed to a series of infiltration basins/ponds located along the southerly and easterly boundaries of the site or through underground infiltration chambers. Runoff from these systems eventually outlet to a wetland (Wetland 2 on Figure 7 of the EAW) that is connected to another extensive wetland complex (Wetland 1) that is located in the George Watch Lake watershed.