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Main Street Village <br />Drainage Review <br />City of Lino Lakes, Minnesota <br />Page 2 <br />January 2, 2008 • <br />11/19/07 This item has been addressed. <br />4. Indicate the high water level for all infiltration basins on the Grading Plan_ <br />11/19/07 Label the high water elevation of the existing south wetland and wetland mitigation area on the <br />plan. In addition, revise the high water elevation for biofiltration basin 8 and the south wetland to <br />be consistent with the peak elevations in the proposed conditions model. <br />5. To provide a well aerated, highly porous surface, it is recommended that the soils of the infiltration <br />basin floor be loosened to a depth of at least 12 inches prior to planting. <br />6. Provide a cross - section detail of the infiltration areas on the Plan that includes type and depth of <br />engineered soil. <br />11/19/07 This item has been addressed. <br />7. Show the location of all inlet protection, along with a detail of the inlet protection, on the Erosion <br />Control Plan. In addition to the locations shown on the Storm Water Pollution Prevention Plan, <br />inlet protection should be placed in existing catch basins located near the construction entrance to <br />the site. <br />11/19/07 Include a detail of the inlet protection on the plan. <br />8. It is recommended that the stormwater pond bench area be seeded with native vegetation to <br />enhance soil stabilization, nutrient uptake, and wildlife habitat within the pond. <br />11/19/07 This item has been addressed. <br />9. Submit storm sewer calculations for review when available. <br />10. Submit a copy of the NPDES permit for the City's records when available. <br />11. Approval from Rice Creek Watershed District (RCWD) is required. Submit a copy of the RCWD <br />approved permit when available. <br />12. Clarify why the total existing area defined in the model is approximately 4 acres less than the total <br />existing area defined in the model dated May 3, 2007. Revise the current existing conditions model <br />so that the total area is equal to the area in the model dated May 3, 2007. <br />11/19/07 This item has been addressed. <br />13. Existing rates may change due to modifications of the model based on comment 16 above. Rate <br />control requirements will be reviewed when the revised model is submitted. <br />• <br />11/19/07 This item has been addressed. <br />Additional Comments (11/19/07) <br />14. Label the low floor and low opening elevation of the existing bank building on the Grading Plan. <br />15. Provide pretreatment of runoff prior to discharging into biofiltration basin 9. <br />16. It is recommended that trees native to wetlands of the region be planted in the wetland mitigation <br />area. <br />• <br />