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Home My WebLink About2004-09-08 BRAA Ltr to OPHBonestroo Rosene Anderlik& Associates En & Architects September 8, 2004 3onestroo, Rosene, Anderlil( and Associates, Inc. is an ative Action Opportunit Emplo and Emplo Owned Principals: Otto G. Bonestroo, RE. • J"Vlarvin L. Sorve-fla, P.E. • Glenn R. Cook, P.E. ja Robert G. SCIILMICht, RE. • Jerr A. Bout-don, PF_- • Mark A. Hanson, RE Senior Consultants: Robert W Rosene, RE. a Joseph C. Anderlik, PE Richard E . Turner, PE. ■ Susan M. Eberlin, C.P.A. Associate Principals: Keith A. Gordon, RE • Robert R. Pfefferie, RE. w Richard W, Foster, RE. • David Or Loskota, PE_ Michael T. Rautmann, PC-. ■ Ted K. Field, RE. ■ Kenneth P Anderson, RE, • Mark R. Roll's, PE. • David A. Bonestroo, M.B.A ■ Sidne P Williamson, RE,, L.S. • A M. Rin M.B,A- ■ - Allan Rick Schmidt, RE. • Thomas W. Peterson, RE. ■ James R. Maland, RE. • Miles B. Jensen, RE. • L. Phillip Gravel 111, RE. • Daniel J. Ed P.E. • Ismael Martinez, RE. Thornas A. S PF__ ■ Sheldon J. Johnson • Dale A, Grove, P.E. • Thomas A. Roushar, RE • Robert J. Dever RE. Offices: St PaLil, St. Cloud, Rochester and Willmar, MN ■ Milwaukee, Wl - Chica IL Website: www.bonesti-oo.com Mr. Eric Johnson Cit Administrator Cit of Oak Park Hei 1,4168 Oak Park Blvd-.,, P.O. Box 2007 Oak Park Hei MN 55082-2007 Re: Oak Green Villa Plat and Gradin Plan Review BRA File No. 55-04-000 Dear Eric: We have reviewed the g radin g , storm sewer and erosion control plans for the proposed Oak Villa development as submitted, on Au 30, 2004, b Folz, Freeman, Erickson, Inc. Followin are our comments and/or recommendations (previous comments still applicable are shown in italics). Plat 1. The plat was not submitted with this plan and re additional review. Erosion Control and Seeding,,.Plan — Sheet C3.1 1. The inlet protection detail for existin structures does not clearl show how to clean the fabric without silt dumpin into the stnucture. For inlet p-,_'otection of the existin structures we recommend usin the Road Drain Curb and Gutter, manufacturer b Wimeo, LLC. or the Silt Screen, manufacturer b Alpine Stormwater Mana g ement. 2. There will be storm sewer catch basins installed on this pro therefore, an inlet protection detail will be re for the new structures. Gradin and Drainage Plan — Sheet C4.1 and C4.2 1. On the west side ofBlocks I & 2, and on the north side ofBlocks 3, 4, & 5, the 4,foot hi slopes are at approximatel 2.• 1. I this area is g rass it will be a difficult slope to maintain. The recommended maximum slope is 3:1. 2. In Blocks 1, 2, 3, 4 & 5, the 4foot hi berm drains directl into the row homes. The draina path around these homes is not defined on the drawin 2335 West Hi 36 ® St. Paul, MN 55113 s 651-636-4600 x Fax: 651-636-1311 3. The north retaining wall is approximately 8' high and adjacent to a sidewalk. A protective handrail will be required on the wall. The handrail should be detailed on C105.1. 4. The emergency overflow low (EOF) for the south pondlwetland is shown at 946.0. At approximately 944 the storm water will hack up through the storm sewer and discharge south of 58 tit Street into the River Hills development. It is imperative that the emergency overflow route is not into the River Hills development. As such, the EOF located on the east side of Nutmeg Boulevard should be lowered to an elevation I foot below the top of the berm into the River Hills Development. Additional survey information may be required to determine this elevation. Storm Sewer Plan C5.2 1. To protect the future retaining wall and provide an outlet for private laterals, it is recommended this project installs the storm sewer from the pond. outlet to 25' past MH 127. At this point a temporary pipe can be installed to the next pond. 2. Detail 2105.2 should be changed from 12" to 8" to 18" to 8 ". 3. On the City owned manholes the casting shall be Neenah R -1642 with a B type lid. 4. The storm sewer calculations should be submitted for review. Sanitary Sewer, Storm Sewer and Water Main 1. Private sanitary sewer, storm sewer, water main and street improvement information has not yet been submitted and will be reviewed when submitted. Public improvements will be prepared by Bonestroo &Associates during the final design of the project. Since Bonestroo & Associates will be preparing the final plans and specifications for this project when authorized to do so, specific comments relative to street and utilities layouts will be addressed at that time. Any items affecting grading or other site improvements being constructed by the developer will be coordinated with the developer's engineer. If you have any questions or require additional information, please contact me at (651) 604 -4788 or Dennis Postler at (651) 604-4815. Sincerely, B ONESTROO, ROSENE, ANDERL.IK & ASSOCIATES INC Karen S. Erickson, P.E. cc: 'horn Ozzello, Public works Director Jim Butler, Building official Scott Richards, City Planner Mark Vierling, City Attorney Kathy Widin, City Arborist Todd A. Erickson — Folz, Freeman, Erickson, Inc. DMP, DDII, File — Bonestroo & Associates K:`55\5504000\Work_Tn Progress\Johnson_KSE " oakgree village grading review_9- 8- 04.doc