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Home My WebLink About2007-10-16 BRAA Ltr. to OPHOctober 16, 2007 Mr Eric iohnson City Administrator City of Oak Park Heights 14108 Oak Park Blvd, P.O. Box 2007 Oak Park Heights, MN 55082-2007~ Best Buy " Jan-R6[ew Bonestroo file No, 55-07-000 Dear Eric: Sheet 4 of 9 We have reviewed the plans we recently received for the Best Buy development as submitted by Westwood Professional Services, Inc. Following are our comments and/or recommendations. 1. The new dri will require full depth removal of the existing bituminous roadways a minimum of 2 feet beyond the driveway in all directions. In addition, based on the age of the roads, milling the surface pavement and placing a surface course overlay for the entire length of the driveway will be required to the centerline of both Krueger Lane and 60t Street North. 2. All striping and si ning removed on or along 60t Stree North and Kruege Lane shall be restored to its original condition. 3. It is recommended that 60 Stree North and Krueger Lane remain open during construction All traffic control devicesfilaggers must be in-place prior to any work on 60t Street North and Krueger Lane. 4. All patches on 60t stree North and Krueger Lane shall be completed within 72 hours of installing utiiities and/or driveway construction. 2335 Highwa 36 W St. Paul, MN 55113 Tel 651-636-4600 Fax 651-636-1311 www.bonestroo.com EXHIBIT �� #Bonestroo su Paul St. Cloud Rochester Milwaukee Chicago Engineers Architects Planners City of Oak Park Heights Page 2 Best Buy October 76, 2007 5. The bituminous patches on 60t street North and Krueger Lane, as described above, should be hatched on the plans at the various locations. The existing section on 60t street North and Krueger Lane is as follows: 11/2 Bituminous wear course 11/2" Bituminous binder course 3" Bituminous base course 8" Class 5 12" Aggregate Backf i ll 6. Identify the design of the islands adjacent to the access from Krueger Lane. Are they curb and gutter or painted? Also refer to traffic comments about access to /from this parking aisle. 7. A MNDOT utility permit and a MNDOT access permit will be required for the connections at 60t Street North, Sheet5of9 1. Add the percent grades to the drainage arrows. 2. All construction traffic shall enter from Krueger Lane. 3, Provide more detailed information for temporary and permanent erosion control methods; including storm sewer inlet protection, sequencing, sedimentation basin, floating silt fence, temporary diversions, staging area, concrete washout area and erosion control notes. Sheet 6 of 9 1, At MH -1 the note states to construct the manhole over the existing 8" PVC. The label on the existing sewer calls out a 10" PVC sewer. Which one is correct? 2. Provide insulation at each watermainlstorm sewer crossing. 3. Confirm that a separate domestic service for Future Building should be installed. 4. The gate valve at the 60t Street North driveway entrance appears to be in conflict with the proposed culvert. 5. Verify the proposed fire hydrants incorporate an AFC - Waterous Storz Nozzle. The hydrant pumper nozzle shall be of one -piece design, compatible with a 5" Storz hose coupling. The nozzle shall be an integral part of the fire hydrant and must be furnished by the manufacturer or authorized distributor designated by the manufacturer. Storz adapters will not be accepted. City of Oak Pork Heights Page 3 Best Buy October /4 2007 Sheet 7 of 9 1. Provide an additional 5' of drainage and utility easement to the existing 10' easement for the existing 48" storm sewer pipe along the south property line, making it a 15' easement. 2. According to our plans, MH 101 is a 48" tee section. Verify that CBMH 1 can be constructed that close to existing MH 101. In addition, verify that the 24" storm sewer can be connected to the existing 48" tee section. 3. Install trash guards on the culvert located along 60t Street North. In addition, add rip rap on the downstream end. 4. There are several rim elevations of catch basins that are at or below the HWL for the pond. (Structure 2, 3, 4, 5, 7,8, 8A, 9, 13) The loading dock area will have 1.5' of water when the pond is at the HWL. In addition, it appears that in an event greater than the 100 year storm the parking lot will have approximately 1.2' of storm water before overtopping the emergency overflow at 925.68. 5. Include on the drawings the detail for storm manhole 10. (This detail was included in the storm water calculation packet and the rim shown on the detail needs to be revised for this project) 6. The StormTech is located under pavement and if the soils are not conducive to infiltration it is possible that 2.5' of water could be trapped in the chambers beneath the pavement. To assist in the drainage of the StormTech chambers is it possible to add aggregate drainage channels from the chambers to the pond? 7. The general notes for the storm sewer are shown on sheet 6. These notes should be shown on sheet 7 or a note should be added referring to the general notes on sheet 6, 8. Submit Rational method calculations for the storm sewer sizing. Sheet 9 of 9 1. Trees are proposed in the utility easement along the south property line. The property owner will need to enter into an agreement with the City acknowledging that when the city needs to maintain or replace the storm sewer the trees will be removed and replaced at the Owners expense. 2. Confirm whether the Future Improvements area is sod, seed, or pavement. From this drawing it appears that the drive entrance from Krueger is not to be constructed at this time and sod is being installed. Cleary identify on the plans the location of sod /seed. City of Oak Park Heights Page 4 Best Buy October 16, 2007 Traffic Comments 1 Provide separate site plan with Autoturn truck turning /routing movements to confirm curb radii are adequate and driveway widths are satisfactory. It appears that trucks will be using the north access to the back of the buildings. The radii appear able to accommodate semi - trucks although that should be confirmed. However, the path for trucks exiting is not clear. There is no turn- around, so they are forced to the south part of the site. The three options are to use the combined Menards /proposed Best Buy access to Krueger Lane, use the exclusive Best Buy access to Krueger Lane, or use the north access after traveling in front of the buildings. Each route appears to have sharp radii and awkward turns that will cause problems for semi - trucks, The path of the trucks needs to be confirmed and shown that it is able to make all the expected movements. 2. Provide 36 -foot wide access to 60t Street North. With expected small queues and satisfactory level of service for traffic on the north access, two outbound lanes (left and right turn lanes) are not necessary for now. However, a wider access 36 feet (two 18 -foot lanes) would better accommodate semi - trucks. Right turning vehicles would also be allowed to sneak by another vehicle waiting to turn left. If a 36 -foot roadway is provided, it could be re- striped as two exit lanes in the future if problems arise. 3. It would be preferred to have the south access to the shared roadway line up with a parking aisle for Menards, if possible. Although this is a slower area with drivers expecting a variety of movements, the current layout creates unnecessary conflicts. 4, The south access to Menard's will require an ingress /egress easement between the two property owners. 5. Parking directly on and off the primary access to Kruger Lane is not recommended. If sufficient parking is available, eliminate these stalls and add a median to channel traffic and prevent direct access to the drive. 6. The curb radius for southbound Krueger Lane onto the westbound combined Best Buy / Menards access road is small. Although this is existing, right turning traffic at this corner would benefit from a larger radius similar to the radii planned for other access roads. General Comments 1. The following items need to be submitted to the City: a. Copy of the Approval letter from the Browns Creek Watershed District. b. Copy of the MNDOT permits for access and utility work in the right of way of 60t Street North. City orOak Park Heights Page Best Buy October 16, 2007 The plans will require further review when tems discussed in this etter are submitted. If you have any questions or require additional information, please contact me at (651) 604-4788 or Dennis Post ler at (651) bO4'4815. Sincerely, BONESTROO Karen S. Erickson, P.E. cc: Tom Ozzello, PubHc Works Director Jim Butler, Building Official Scott Richards, City Planner Mark Vier ling, City Attorney Curtis Neft Westwood DMP, BMK, CWL2, Fi|e—Bonestroo