07/15/2004 Env Bd Packet - Laserfiche WebLink

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• elevations of structures must be at least two feet above this elevation, or 889.6. Standard plat review by the City includes compliance with lowest floor elevation requirements. • Proposed floodplain fill is 800 cubic yards. An area southeast of the island and north of Birch St. is proposed for compensatory storage to match the volume of floodplain fill. The City will ensure that the Rice Creek Watershed District receives fill information for its review. The Watershed review of the plat/PUD application includes the need for compensatory storage. The Watershed requires a floor elevation at least two feet above the 100 year flood. 15. Water surface use. Will the project change the number or type of watercraft on any water body? ❑ Yes L1 No If yes, indicate the current and projected watercraft usage and discuss any potential overcrowding or conflicts with other uses. Wards Lake is not conducive to motorized watercraft use because of shallow water, extensive wetlands, and related vegetation. It is possible that residents of the eight homes would use canoes if the water level is high enough. This would not be a noteworthy number of watercraft. 16. Erosion and sedimentation. Give the acreage to be graded or excavated and the cubic yards of soil to be moved: acres 1_9 : cubic yards 10,000 . Describe any steep slopes or highly erodible soils and identify them on the site map. Describe any erosion and sedimentation control measures to be used during and after project construction. The proposed development site consists of Hayden fine sandy loam with 12 to 24 percent slopes. Erosion control measures will be developed and implemented during construction in accordance with the Best Management Practices contained in the MPCA Stormwater Construction Permit program to minimize impact to areas susceptible to erosion. These measures will include the use of silt fences, temporary sediment basins, cut off swales, rock construction entrances, cleaning of adjacent streets as needed, rip rap at storm outfalls, silt fence around storm inlets during construction, and timely revegetation of all disturbed areas. The site will be monitored by the contractor, the owner's representative, Rice Creek Watershed and the City engineer for erosion and defective erosion control measures. Of the estimated 10,000 cubic yards of earth moving, approximately 6,000 cubic yards will be imported to the site. 17. Water quality: surface water runoff a. Compare the quantity and quality of site runoff before and after the project. Describe permanent controls to manage or treat runoff. Describe any stormwater pollution prevention plans. • Site runoff will be increased by the construction of new impervious surfaces, such as roadways, driveways, and residential structures. In the existing condition it would be Environmental Assessment Worksheet Page 12 Pheasant Hills 12th Addition