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in miMroNU ».• *»»“February 3, 1988 <br />Sec 13CC <br />'uctlon project Involving 2.8 <br />ides curb and gutter, sidewalk <br />/ou have submitted as part of <br />iction taken by the Board of <br />! above permit. <br />lek Watershed District, <br />ts: <br />iber 25, 1987. <br />on and bridge replacement <br />1987. <br />27, 1988. <br />' construction is not complete <br />;ed. Please contact the <br />1 commence so an Inspector may <br />Board <br />L. Smith <br />J. Boudreau, DNR <br />City of Mound <br />City of Spring Park <br />City of Orono <br />1/^ I Bonestroo M=s RoseneAnderllk & |\J| AssociatesEnginecft A ArchitectsFebruary 10. 1988City of Orono Box 66Crystal Bay. MM SS32S <br />Attat Jeanne Mabusth <br />Eat 13935 Co. Ed. 15 <br />Dear Jeannes <br />i. <br />% • !•: <br />one G iDmawm PC ttobevt w aoHht. PCJpMph C AndirWi. PC trmdtertf A Umherg. PC tten«r« C limer. PI James C OHon. PC Glenn C Cook. PC Thomas C Moyev PC Mobeft G Schunicnt. PC Marwm L Sorvala. PI NMh A Gombon. PC ■Khard W Foswv. Pi OonaM C luncarM;. PE Jerry A Bourdon. PC Mark A Hanioa PE 1M K FielCl. PE Micnaei T tautmann. PE. Robert ■ PHeflent; PJ David O Loakou. PX^Thomas W Amnon. PJ MKfsaei C. lynch. PC. James I Maund. PJ. wenneifi P Andmon. PC MMh A Bachmann. PC Mark R Rolfs. PI Bodert C. Russek; Ai A ThomiB C. Angus. PC Mosward A Saniord. PC Charles A. rrickson Leo M PRwreiBky Harlan ML Ohon Susan M EBeettrs Mark A Se^ <br />Ve heve reviewed the infonwtion submitted by Hennepin County relative to <br />flood plain encroachment on the County Road 15 project. The county »iil «>• <br />filling in e portion of wetland area 914W. The County will also be working <br />within 75 feet of the Lake Minnetonka shoreline. <br />The total encrochment into wetland 914W is 0.05 acres. The project wlH <br />result in any reduction in the water storage area. Excavation of the ditch <br />north of County Road 15 will cause a slight increase in water storage area. <br />to be controlled at 17 cfs. The culvert under County Road 15 will be <br />increased frcMS 24 inch to 30 inch. The actual control for the wetland is an <br />existing 24 inch culvert on Casco Point Road that is 1.5 feet higher than the <br />invert of the proposed 30 inch pipe. The city could reduce the discharge from <br />the area Morth of Co. Rd. 15 in the future by dredging out the wetland. <br />The area being disturbed within the 75* setback area of Lake Mlraetonka is <br />hlghlisbtcd on the attached plan. The construction in this area will be abme <br />the 931.5 elevation and will not require a permit from the DHR. The pl^ <br />provides for excavating and filling up to two feet in the area show. The <br />storm sewer comiing from the Hennepin County shop will be upgraded from 18 <br />inches to 30 inches. Hennepin County will be increasing the pond sixe near <br />the shop as a part of this project. The drainage area that contributes flow <br />to the pond is 12.5 acres. The pond will allow the outfall to be controlled <br />at 8 cfs. <br />Page 1. <br />2335 W^st Highway 36 • St. Paul, t'^lnnesota SSI 13 • 612-636-4600 <br />Mm <br />■mmM <br />■ .is* ■.asB'iiV <br />j)',-, <br />if <br />1--5