04-16-2018 Planning Commission Packet

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QBOLTON & MENK Real People. Real Solutions. April 9, 2018 City of Orono Attn: Adam Edwards 2750 Kelley Parkway Orono, MN 55356 RE: Site Plan Application #LA18-000034 2635 Kelley Parkway Engineering Review #1 Dear Adam: 2638 Shadow Lane Suite 200 Chaska, MN 55318-1172 Ph: (952) 448-8838 Fax: (952) 448-8805 Bolton-Menk.com As requested, we have completed an engineering review of the documents submitted for the above referenced project. We offer the following observations, comments, and recommendations for your consideration: 1. The regional pond located directly adjacent to the east provides rate control for stormwater runoff from this parcel. However, due to rule changes since the pond's construction, stormwater management measures must be included to limit runoff volume and discharge of Total Suspend Solids and Total Phosphorus to that of existing conditions. The existing condition was modeled as approximately 50% meadow and 50% woods in the approved Stone Bay Stormwater Management Plan, dated September 5, 2002. A revised Stormwater Management Plan must be submitted accordingly. 2. Storm sewer calculations must be submitted to verify adequate sizing of drainage system. 3. A separate City permit must be obtained for the sanitary sewer and water connections. 4. The condition of the regional pond adjacent to the site must be reviewed by the City and Contractor prior to any work. The pond bottom must be verified with survey prior to any work, and once work commences, the Contractor shall be responsible for removing any sediment added to the pond due to site construction. 5. The condition of Kelley Parkway and adjacent sidewalk must be reviewed by the City and Contractor prior to any work and verified with video or pictures. Any damage to the street or sidewalk after work commences shall be deemed to be caused by the Contractor and the Owner's responsibility to repair. 6. All work within public right-of-way and connections to watermain must be coordinated with the City. Contractor must provide a minimum 48 hour prior notice. 7. All construction equipment must be parked on site. Clear drive lanes must be maintained on Kelley Parkway at all times. 8. Temporary barricades must be installed at the east entrance to direct traffic through the rock entrance until the site is permanently stabilized. 9. Drainage and Utility Easements must be revised to adequately cover utilities as follows: a. Watermain, hydrants, and valves (except private service lines) b. Stormwater management facilities used to meet governmental requirements 10. Per the resolution approving the Concept Plan, a 10' trail easement must be provided adjacent to the south lot line. H:\ORNO\C13115486\z-LA18-000034_2635 Kelley Parkway\2635KelleyPkwy-1_2018-04-09.docx Bolton & Menk is an equal opportunity employer.