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Home My WebLink About2004-08-06 BRAA Ltr to OPHBonestroo Rosene Anderfik& Associates En & Architects Au 6, 2004 lonestroo, Rosene, Anderlik and Associates, Inc. is an hive Action/E Opportunit Emplo -ind Emplo Owned Principals: Otto G. Boriestroo, PE.. Marvin L. Sarvala, RE. ■ Glenn R. Cook, P.E. - Robert G. Schunicht, RE. ■ Jerr A. Bourdon, RE. ■ Mark A Hanson, RE. Senior Consultants: Robert W. Rosene, RE. ■ Joseph C. Anderlik, PE, ■ Richard E. Turner, RE. ■ Susan M. Eberlin, C-PA. I ow Associate Principals: Keith A. Gordon, PE. Robert R. Pfeffer F, 11111�iiir. = Richard - oster, PE.. David 0. Loskota, RE. Michael T. RaLltmann, RE- - Ted K. Field, RE. Kenneth P An son, P.E. ■ Mark R. Rol RE, - David A. Bonestroo, M.B.A. Sidne P Williamson, PE., L.S. - A M. Rin M.B.A. n Rick Schmi Thoma W on, RE. James R. Maland, RE. Miles 8. Jensen, RE. L. PhMip ravel III, R Daniel J. Ed RE. - Ismae artinez, RE. ■ Thomas A. S RE. Sheldon J. Johnson Dale . Grove, RE. ■ Thomas A. R01-ishar, PE. Robert J. De r RE. Offices: St. Paul, St. Cloud, Rochester and Will r, MN - Milwaukee, W1 - Chica IL Website: www.bonestroo.com Mr. Eric Johnson Cit Administrator Cit of Oak Park Hei 14168 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: 1 %, 11101. We have reviewed the plat, g radin g , pondin and erosion control plans for the proposed Oak Villa development as submitted b Folz, Freeman, Erickson, Inc. and have the followin comments and/or recommendations for y our. consideration: Plat 1. In the southwest comer of the development a Draina and Utilit Easement is re for the storm sewer located north of 5 81h Street North and East of Novak Avenue North. 2, Outlot F and Outlot H shall be labeled as a Draina Easement. Leader Lines should be placed to the boundar of the Outlots. 3. In Outlot L Draina and Utilit Easements for the sanitar sewer are re in the center ,3r.d eost side of the Ov iflot. 4, It is recommended below ( Item 6 under Gradiin and Draina Plan) that the outlet for the wetland/pond be moved to the west. A Draina and Utilit Easement will be re for this new location. Removal Plan — Sheet C2.1 1. The development of this site re the removal of trees. The Cit Arborist should review these removal items. EroS...'lon Control and Seeding Plan — Sheet C3.1 1. The "fiber" blanket should be net two side erosion control blanket. This would meet M-nDOT 3885 Cat. 3 specifications. 2335 West Hi 36 v St. Paul, MN 55113 m 6516636-4600 a Fax: 651-636-1311 2. Include note stating that vegetation protection to be installed prior to commencing any grading activities (i.e. tree fencing). 3. Note 8 discusses repairing silt fence within 24 hours of discovery. The word "silt fence" should be replaced with "any erosion control BMP ". 4. Note 9 discusses temporary seeding of open soils. This should be outlined to satisfy NPDES requirements of 7, 14, or 21 days according to slope gradient. Also, this should be noted to include stockpiles of organic content like topsoil, sand etc. (i.e. not bituminous millings, concrete, etc.). 5. Indicate where blanket and mulch is to be installed on the erosion control plan. 6. Indicate limits of clear and grub, and limits of land disturbance on erosion control plan. 7. Indicate locations of all inlet protection and catch basin protection on plan. Update should be provided to inlet protection detail to include overflow capacity, and appropriate BMP. Detail is not an industry current standard. 8. Rip rap and geotextile liner should be indicated on the erosion control plan at all outlets. 9. what BMP is being used for day - lighting drain the from behind retaining walls along pond edge? Please provide detail for drawing. 10. Provide detail for blanket installation. 11. Provide detail for updated inlet /catch basin protection. 12. Update silt fence detail to include metal fence posts, not wooden due to longevity of project over winter. 13. Indicate dormant seeding dates and requirements for maintenance. 14. Indicate responsible party to provide city with weekly inspection logs per NPDES requirement. 15. Indicate who emergency contact will be for all erosion related issues of concern. Grading and Draina e Plan -- Sheet C4.1 and C4.2 1. On the west side of Blocks 1 & 2, and on the north side of Blocks 3, 4, & 5, the 4 foot high slopes are at approximately 2:1. If this area is grass it will be a difficult slope to maintain. The recommended maximum slope is 3:1. 2. In Blocks 1, 2, 3, 4 & 5, the 4 foot high berm drains directly into the row homes. The drainage path around these homes is not defined on the drawings. 3. The north retaining wall is approximately 8' high and adjacent to a sidewalk. A protective handrail will be required on the wall. 4. The design and construction of the proposed retaining walls adjacent to the storm water pond is the responsibility of the developer's engineer. we will require detailed design drawings and calculation for these walls. 5. The emergency over flow (EOF) for the south pond/wetland is shown at 946.0. At approximately 944 the storm water will back up through the storm sewer and discharge south of 58 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 Nutme Boulevard should be lowered to an elevation I foot below the top of the berm into the River Hills Development. Additional surve information ma be re to determine this elevation. 6. It is recommended that the outlet for the pond/wetland be moved west of the retainin wall. At the location currentl shown the outlet for the pond/wetland is in conflict with the footin of the retainin wall. In addition, the outlet structure at the current location would be difficult to access for maintenance. 7. The H model from December 9, 2003 was reviewed and found to be in conformance with the Cit plan. Of the seven ponds modeled, two are future ponds. These ponds, labeled in the model as "future pond" and "pond 5", will re a detailed anal with final desi of the areas. 8. Storm sewer is bein stubbed to the west alon the north side of 58 1h Street North to collect storm water runoff from a future phase of this development. This future tributar draina area will reroute storm water runoff from the Brown's Creek Watershed District ( BCWD ) to the Middle St. Croix Water Mana Or ( MWC-WMO ) . Review and written approval is re for this issue from both entities. Sanitary Sewer, Storm Sewer and Water Main 1. Sanitar Sewer, Storm Sewer, Water Main and private street improvement information has not y et been submitted for this plan review and will either be reviewed when submitted or prepared b Bonestroo & Associates durin the final desi of the pro Since Bonestroo & Associates will be preparin the final plans and specifications for this project when authorized to do so, specific comments relative to street and utilities la will be addressed at that time. An items affectin g radin g or other site improvements bein constructed b the developer will be coordinated with the developer's en If y ou have an q uestions or re additional information, please contact me at (651) 604-4788 or Dennis Postler at (651) 604-4815. Sincerel BONESTROO, ROSENE, ANDERLIK & ASSOCIATES INC Karen S. Erickson, P.E. cc: Tom Ozzello, Public Works Director Jim Butler, Buildin Official Scott Richards, Cit Planner Mark Vierlin Cit Attorne Kath Widin, Cit Arborist Todd A. Erickson — Folz, Freeman, Erickson, Inc. DMP, DDH, File — Bonestroo & Associates \\branas0l\odd",55\55040001 Work—In—Progress\Johnson—KSEAoakgree villa g radin g review.doe