02/11/2008 Council Packet - Laserfiche WebLink

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Vaughan's 1st Addition Page 2 January 25, 2008 Drainage Calculation Review • City of Lino Lakes, Minnesota 3. A three foot (3') minimum separation is required from the bottom of the infiltration basin to the seasonally high groundwater. Based on the submitted soil borings, the seasonal high groundwater was observed at approximately two feet (2') below existing grade. 01/25 /08 This item has been addressed. 4. The City may require the Applicant to submit an alternative design for this site. The final development plan alternative will need to demonstrate that floodplain fill, disturbance within the 75 foot shoreland impact zone, and encroachment of the building structure in the 150 structure setback is minimized The following are minor plan, calculations, and drafting corrections that must be addressed prior to final approval: 1. If an NPDES permit is required for this site, submit a copy of the permit for the City's records when available. 2. Contact Rice Creek Watershed District to determine if a permit is required for this project. If required, submit a copy of the RCWD permit for the City's records when available. 3. Any disturbance within the wetland buffer area shall be restored with native vegetation. 12/26/07 Specify the type of native vegetation used to restore the disturbed wetland buffer areas on the plan. 01/25/08 This item has been addressed. 4. The concrete washout area labeled on the Grading Plan will need to be moved out of the 75 foot shore impact zone and located in an area that will minimize the potential for concrete and rinse water to impact the wetland and adjacent buffer areas. Provide a detail of a concrete washout area on the plan. The detail should show how the rinse water and concrete will be contained in the washout area. A note should also be included on the plan that requires proper off -site disposal of the waste concrete and rinse water. 01/25/08 This item has been addressed. Additional Items (01/25/08) 5. The floodplain fill has been reduced from 200 cubic yards (Grading Plan dated 12/14/07) to 122 cubic yards (Grading Plan dated 1/15/08). To minimize impact due to grading in the shore impact zone, the compensatory storage shown on the Grading Plan should be reduced from 204 cubic yards to approximately 122 cubic yards. 6. Indicate the top of berm elevation of the infiltration area on the grading plan. 7. The Grading Note 6 shall include a sentence stating that the infiltration area will not receive topsoil. 8. Indicate the amount of fill required for this site on the plan. —72—