04-09-2018 Council Packet - Laserfiche WebLink

Home Browse Search

QBOLTON & MENK Real People. Real Solutions. March 15, 2018 City of Orono Attn: Melanie Curtis 2750 Kelley Parkway Orono, MN 55356 RE: Preliminary Plat Application 2018-3996 Topside Engineering Review #1 Dear Melanie: 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. Per City Code, this location is designated for connection to City sanitary sewer when developed. However, the applicant has submitted an application for waiver of sanitary sewer connection due to perceived hardships. We have discussed this requirement and application for waiver with the City Engineer and defer to the City regarding sanitary service for this plat. 2. Perimeter erosion control measures (siltfence, rock entrance, etc.) should be indicated on the plan. If septic sites are allowed, protection fencing should also be installed around sites. Measures should be installed by the Contractor and inspected by the City prior to any other work. Contractor must provide minimum 24 hour notice prior to inspection. 3. Retaining walls 4' or greater in height must be designed by a licensed Professional Engineer. Tiered walls less than double the height of the lower wall apart will be considered one wall. Wall plans should be submitted for review and approval prior to construction. 4. It is unclear what is proposed for common driveway. If the driveway for Lot 2 is connected directly to Lot 1's driveway instead of the common driveway in Outlot A, an easement for the shared portion will be necessary. 5. A Final Landscape Plan should be submitted with the Final Plans. The Plan should include the following: a. Types and locations of proposed restoration. b. De -compaction of existing soils under removed impervious surfaces with 12" ripping depth prior to placement of topsoil. c. Trees to be removed. d. Trees to be preserved. e. Additional trees to be planted. 6. A Flowage and Conservation easement will be required over all wetlands. 7. Drainage and Utility Easements should be provided as follows: a. Over all stormwater management facilities used to meet regulatory requirements. b. All swales and storm sewer providing drainage for multiple properties. c. 5' along all side lot lines, unless adjacent to Development boundary. d. 10' along all front lot lines, rear lot lines, and adjacent to Development boundary. 8. A conservation easement should be provided over the 20' buffer of trees to be maintained H:\ORNO\Ci3115486\z-2018-axax Topside\Topside_PrePlatReview-1_2018-03-15.docx Bolton & Menk is an equal opportunity employer.