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HomeMy WebLinkAbout2009-04-21 BRAA Plan Review Comments2 335 Highway 36 w St. Paul, MN 55113 Tel 651- 636 -4600 Fax 651 - 636 -1311 www.honestroo.com April 21, 2009 Mr. Eric Johnson, Administrator City of oak Park Heights 14168 oak Park Blvd., P. 0. Box 2007 Oak Park Heights, MN 55082 -2007 Re: Oakgreen Commons & Carriage House Co -Op General Plan Review BRA File No. 55 -09 -000 Dear Eric; Bonestroo We have reviewed the general plans for the proposed Oakgreen Commons & Carriage House Co -op development as submitted by Folz, Freeman, Erickson, Inc. on April 15, 2009. Following are our comments /recommendations for your consideration. Sheet _C1.I 1. Show the locations of the existing wells and spetics for the hones along Oakgreen Avenue, Sheet C1.Z I. Attached is the record plan for the utility improvements on Oakgreen Avenue N. The following information is needed for the removal plan: a. The existing 8" water has an 8" x 6"' tee for the hydrant lead and not a 6" reducer as shown on the drawings. b. There is a 4" PVC sanitary sewer stub that was installed south of the hydrant. This stub should be removed to the wye and plugged at the main line. 2. The existing hydrant and 8" x 6" tee on Oakgreen Avenue N. shall be salvaged and delivered to the City of Oak Park Heights Public works department. 3. Full width removal and replacement of the bituminous pavement on Oakgreen Avenue N. should be shown at the connection to the existing sanitary manhole, The typical section on Oakgreen Avenue N. is as follows: 2" MVWE3503SE 3" MVNw35035B 8" Class 5 24" Aggregate Backfill 4. Show the removal/abandonment of the sanitary and water service for the townhome that is being razed. St. Paul St. Cloud Rochester Milwaukee Chicago Sheet C2.2 1. The pedestrian ramp at 58 Street N. and Oakgreen Avenue N. should be directed to the south. On the south side of 58 Street N. a pedestrian ramp should be added that faces to the north. In addition, a zebra striped cross walk and pedestrian crossing signs should be added at this crossing. 2. It is not recommended to have parking stalls directly accessing the through roadway. Shppf M , 1. The west 941 contour along Oakgreen Avenue should be extended south by approximately 30'. The existing 941 contour is in conflict with the proposed 942 contour. 2. On the east side and southwest areas of the property the grading will impact the existing trees. will the trees survive these grading limits? 3. can the north side of the property there is a ten foot high hill at a 3:1 slope that is directly adjacent to the existing trail. Incorporate a design that will ensure permanent erosion control on the slope and over the trail. Sheet C3.2 1. For pedestrian and bicyclist safety, a fence is required at the top of the boulder retaining wall, 2. To keep storm water /snowmelt from discharging directly over the path it is recommended that the path and boulevard be sloped a minimum of 2% towards the street. 3. Detailed design drawings and calculations for the retaining walls signed by an engineer licensed in Minnesota shall be submitted to the City for review and approval prior to construction. 4. The wall will be sitting directly on top of an existing 30" FRCP storm sewer. Bridge the wall over the pipe. Sheet C4.1 1. The attached record drawings for Oakgreen Avenue N. shows an invert on the existing sanitary manhole at 923.51. It is recommended that the sewer line enters at the bottom of the structure and the invert of the structure be reconstructed. 2. For your information there is an 8 steel gas main in the west boulevard along Osgood Avenue. You may want to identify this main with a "Caution" note at the sanitary service /gas main crossing and at the connection to the water main. 3. Insulation shall be placed at all water main/storm sewer crossings. 4. At CB119 there are storm sewer pipes that extend into both buildings. what is the pipe material, size and invert? Do these pipes connect to something? 5. Verify with the Director of Public works that HDPE flared ends sections are acceptable within the City maintained ponds. Preliminau Plat 1. Show/define the easement required for the bituminous pathway along the north side of 58th Street north. General_ items to submit for review 1. The detail plates need to be submitted for review. 2. Copy of the Approval letter from the Middle St, Croix Watershed Management Organization If you have any questions or require additional information, please contact rye at (651) 604 -4788 or Dennis Postler at (651) 604 -4815. Sincerely, BONE OO r Karen S. Erickson, P.E. cc: Judy Holst, Finance Director Tom 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. 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