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Home My WebLink About2018-05-23 Stantec Ltr Re Plan & Drainage Design Review Stantec Consulting Services Inc. 2335 Highway 36 West Stantec St.Paul MN 55113 May 23,2018 File:193800151 Attention: Mr.Eric Johnson,City Administrator City of Oak Park Heights 14168 Oak Park Blvd.N.,P.O.Box 2007 Oak Park Heights,MN 55082-2007 Reference: Holiday Inn Express—Plan and Drainage Design Review Dear Eric, This letter includes updates to our review letter of 5/18/2018,in regards to the storm water comments.We have reviewed the preliminary plans and drainage calculations submitted regarding the proposed Holiday Inn Express.A final review will be provided when final plans and drainage calculations are submitted. Following are our preliminary comments and recommendations: Sheet C200—Proposed Site Plan 1. There should be sidewalk along the west side of the property in the boulevard adjacent to the right- of-way line. 2. Label and reference the improvements to the corresponding details on detail sheets. 3. Provide a detail for the retaining wall. 4. Add a note to the site plan sheet requiring a"butt joint"where the driveways tie in to the City street. 5. Refer to the Fire Department review of fire lanes and circulation. Sheet C300—Storm Drainage and Grading Plan 1. The southerly elevation note on the northerly driveway is covered by the existing sanitary manhole note. 2. Label the swale grade on the east side of the building. 3. The riprap shall be installed per City detail plate STO-13. Include plate on corresponding detail sheet. 4. The storm sewer that serves the site will be private and maintained by the owner. 5. A note should be added to the plans stating any work performed within the water quality feature should be kept to a minimum.In the event heavy machinery is used within the water quality feature area,disk tilling or other means to loosen the soils may be required to allow for proper filtration. Design with community in mind May 23, 2018 Mr. Eric Johnson, City Administrator Page 2 of 3 Reference: Holiday Inn Express - Plan and Drainage Design Review Sheet C400 — Utility Plan 1 . It is recommended that an 8-inch line be considered for the water service to the hydrant and the building in order to provide the maximum flow possible. 2. The watermain, hydrant, and sanitary sewer that serve the site will be private and maintained by the owner. 3. The hydrant and valve shall be installed per City detail plate WAT-8. Include City detail plate on sheet C601 . 4. Show the crossing of the water service over the sewer service in profile with elevations. Add to Sanitary Sewer Note 4, " Watermain joints shall be located as far from a crossing with sanitary sewer as possible". 5. Connections to the City's sewer and water systems shall be per the City's standards and detail plates. The City or it's designee shall be present for water and sanitary sewer service connecttions to the City's systems. Sheet C500 — Erosion Control Plan 1 . All erosion control practices need to be in accordance with all requirements of the Brown's Creek Watershed District and the approved SWPPP. Sheet C600, 601 , 602: Detail Sheets 1 . Include City detail plates STO-13, ERO-1 , WAT-3, WAT-6, WAT-8, replacing the corresponding non-City details. Stormwater Drainage Review 1 . Provide the City with the documentation of the approval and conditions from Brown's Creek Watershed District. 2. Due to the site being located within the City's high vulnerability area of the Drinking Water Supply Management Area (DWSMA), infiltration will not be allowed for this project, per the NPDES Construction permit. 3. For the existing and proposed conditions HydroCAD models, why does runoff node HS36-11 differ in size if it is the offsite drainage area? 4. For the HydroCAD models confirm that the MSE Type III rainfall distribution is being used. 5. With the increased HWL in the existing pond, show that the freeboard requirements are being met for adjacent property structures and the HWL ponding area outside of the adjacent parking lots. Design with community in mind May 23, 2018 Mr. Eric Johnson, City Administrator Page 3 of 3 Reference: Holiday Inn Express- Plan and Drainage Design Review General Comments 1. The City reserves the right to inspect the construction of the project. The City or its designee shall be present for water and sanitary sewer service connections to the City's systems. 2. The Owner will need to comply with all requirements of the NPDES Construction Stormwater Permit and the Brown's Creek Watershed District. The City reserves the right to require additional erosion control measures as determined/necessary during the construction of the project. 3. Parking, lighting, landscaping and building to be reviewed by others. 4. The Owner shall be responsible for obtaining all required permits. 5. Utility construction and improvements in the right-of-way need to conform to the City's Standard Detail Plates. The City's details will be provided. If you have any questions or require further information, please do not hesitate to contact me. Regards, Stantec Consulting Services Inc. 4-31/1 Lee M. Mann, PE City Engineer Phone: 651-604-4850 Lee.mann@stantec.com c. Andy Kegley, Public Works Director Julie Hultman, Building Official Scott Richards, City Planner Mark Vierling, City Attorney Lisa Danielson, City Arborist Design with community in mind Julie Hultman From: Mann, Lee <Lee.Mann@stantec.com> Sent: Wednesday, May 23, 2018 11:04 AM To: Eric Johnson Cc: Andrew Kegley;Julie Hultman; Lisa Danielson; Mark Vierling (MVierling@eckberglammers.com); Scott Richards (Scott@PlanningCo.com);Johnson, Tyler Subject: Holiday Inn Express Review Letter Update Attachments: johnson_mann_HolidaylnnExpress_05-23-2018_review.pdf Follow Up Flag: FollowUp Flag Status: Flagged Hi Eric, Attached is an updated review letter for Holiday Inn Express clarifying that infiltration is not allowed due to the site being within the City's High Vulnerability DWSMA. The developer's engineer has been made aware of the issue and we will forward this letter to them as well. P 41 MN,WI, CA Principal Direct: 651 604-4850 Mobile: 651 775-5956 Lee.Mann@stantec.com Stantec 2335 Highway 36 West St. Paul MN 55113-3819 US Stantec The content of this email is the confidential property of Stantec and should not be copied,modified,retransmitted,or used for any purpose except with Stantec's written authorization.If you are not the intended recipient please delete all copies and notify us immediately. 1