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I DNR RLANN1NG Fa/:612-296-6047 Hug 30 '95 11 ;36 R.Oli02 f)Qf1f51 T C- lie.... I Minnesota Department of Natural Resources it ;;00 l.:jiJy~nc RtlJd St. P.tl.lL ~!ilm.;ml::L 55 I 55.':L~_ I I Post-it' Fax Note 7671 O",ta lot )-:2- pages To ,,/<-=-'. I c<>. -PVt< .6vV. ;(~vu:r/ August 25, 1995 PMno> :; {r... Y7-f" FSl( " 'l.f(.. . ~o $f?- I Brian Fritsinger, City Administraror I City of Ard<,n Hills 1450 West Highway 96 ATden Hills. MinnMola 55112 I Re: Environmental Assessment Worksheet for Ogren Townhumes PUD Dear Mr. Fritsinger: .. ",-- The Minnesota Department of Natural Resources (MDNR) has revicwed the above-referenced document and offers the following COD1ments for your consideration. Our major concern is the I potentia] for advers<, effects on Valentine Lake from site drainage, and the extensive modification of the site for development. The City's zoning map shows the property to be outsid<, the shore1and district of Valentine I Lak<" because the water drains away from the lake. The project is proposing to COIU1ect the sediment hasin on thc site to the lake by installing a culvert undcr Old Highway 10. The site would then drain to the lake, yet it would be exempt from shoreland standards. Valenline Lake is classified as a Narural Environment lake. and protecting its water quality is a major I concern. Without thc nOlmal protection provided by shoreland standards, water quality in the lake may be degraded. We rcconill1end that the city and the project proposer consid<,r routing the outflow from the sediment basin to the south under County Road E2 and eventually to Valentine Creek, . I It appears that this project is built out to the limits of rhe site (sreep slopes and wetlands). We understand rhat the site will be graded down to the foot of the steep slopes in the northwest and I that the materia] will be used to fill the eastern part of the site for townhouses 1 to 4. This site grading and the consU1Jction of the scdiment basin will eliminate much of the wooded area on the site. The grading of steep slopes and the transfer of 24,000 cubic yards of soil on site pose I hazards for twO of the wetland basins that abut the townhouses. Soil erosion 13est Management Practiccs (liMPs) must he rigorously enforced. The remaining wctland habitat would benefit from conservation easements (deed restrictions) prohibiting alteration and from buffer strips of natural vegetat.ion. I Item 18 (ami Fi\!\lres 3a/3b) indicat~.s that a detention basin will be constructed on the site, but no additional information is provided. The basin's inlet and outlet are nOt designed properly to .. D~R IllflJlln;nirm: 6\2.296-6;:'7, 1.&OQ-7tS6-60nn . TTY: ('12~2SlG-5.1R4_ 1.~O<'J.f\":;7.)929 A.:l ~~,:!l()lJF'\l:t,I,;jl)' r:'~ll'l1Jp:;" ~ l";'\1~:!.<':;'IH.,','}.~lcdl'",,'''''l'('''''''I:,ir.;Il<:;;\ \VI'ul V..l.l'Jt:~ Di",or'(',ly '-.~ ~ll:'l\l""'''\ -:lr 10':;' (',.'10(."""11"'''\'"' v..<~I~ I