2015-01353 - land alteration - Laserfiche WebLink

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• = BQLTON 8� M � N K , I NC� . ¢ Consulting Engineers & Surveyors �� 2638 Shadow Lane, Suite 200 •Chaska, MN 55318-1172 Phone(952)448-8838• Fax(952)448-8805 www.bolton-menk.com August 24, 2015 City of Orono RONO �Op� Attn: Melanie Curtis 0 2750 Kelley Parkway Orono, MN 55356 RE: CUP Application 15-3725 4167 Highwood Road Engineering Review#2 Dear Melanie: 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 Applicant is proposing to perform site grading of approximately 100 cubic yards and install riprap along the shoreline. If material is to be imported to the site, the City should consider the following: a. The City Engineer should be allowed to inspect any riprap or fill being imported to the site prior to it being placed. b. The Applicant should confirm with the City Engineer acceptable hours of truck hauling and provide documentation on the haul route to be used. Acceptable hours and haul route should be approved prior to the importing of any riprap or fill. c. The City Engineer should inspect roadways on haul route prior to and following completion of work to determine whether adverse impacts have occurred. The applicant should be responsible for the repair to roadways for any adverse impacts. 2. Perimeter erosion control measures should be installed by the Contractor and inspected by the City prior to any land disturbing activities. 3. Disturbed areas must be permanently stabilized within 7 days of completing grading and wall construction operations. The Green-Dale Design Plan should be revised to indicate locations and schedule for re-vegetation or a Landscape Plan should be submitted with the necessary information. 4. The size of rock to be used for stabilizing the base of the sub-wall system should be specified on the plan. Minimum Class V riprap (6"to 30")is recommended. 5. Due to the extent of work proposed, it is recommended that a financial security of$5,000 for erosion control and engineering oversight be required of the Applicant. The financial security is intended to provide protection in the event that it becomes necessary for the City to install or maintain erosion and sediment control within the project area and covers the cost of vegetation re-establishment if the applicant is unable to follow through with the conditions of approval. 6. The applicant may be required to obtain Minnehaha Creek Watershed District(MCWD) approval and permitting for their Erosion Control, Shoreline and Streambank Stabilization, and Floodplain Alteration Rules. A copy of any approvals or permits required should be submitted prior to final approval.