6.4. SR 04-20-1998 - Laserfiche WebLink

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15. Water Surface Use Will the project change the number or type of watercraft on any water body? Yes x No If yes, indicate the current and projected watercraft usage and discuss any potential overcrowding or conflicts with other users or fish and wildlife resources. It is not anticipated that as a result of the project the number of watercraft on Lake Orono will increase. However the project will increase the useable area of the lake dispersing the existing use. 16. Soils Approximate depth (in feet) to: Ground water: minimum~ average__ Bedrock: minimum__ average__ Describe the soils on the site, giving SCS classifications, if known. (SCS interpretations and soil boring logs need no.._3t be attached.) Disposal sites Ground water: The minimum and average depth to ground water at the disposal site is greater than 6 feet. Bedrock: minimum 60 feet average 70 feet. Soil classifications: The majority of the soil at these sites have SCS Soil classifications of Hubbard loamy sand and Sandberg loamy coarse sand. Lake Ground water: The depth to ground water currently is 0 because it is a lake. When the lake is drawn down the depth of ground water will be the elevation of the river or probably lower. No signs of ground water seepage into the lake were observed during past draw downs. Bedrock: minimum 50 feet average 60 feet Soil classifications: No SCS classification exist for lake bottom, but the predominate engineering soil classifications are clayey sand with organic clay (SC - SM/SM) and sand with silt (SP-SM). 17. Erosion and Sedimentation Give the acreage to be graded or excavated and the cubic yards of soil to be moved: acres __61.9 ; cubic yards _115,000_ Describe any steep slopes or highly erodible soils and identify them on the site map. Describe the erosion and sedimentation measures to be used during and after construction of the project. No steep slopes are associated with the project on the lake or disposal sites before or after the construction. The lake bottom in the locations of the proposed work is made up of mainly sand and is unlikely to be agitated into suspension. No flushing of sediment was observed during past draw downs of the lake. Best management practices will be adhered to, the details of which are incorporated into the construction plans. 18. Water Quality - Surface Water Runoff a. Compare the quantity and quality of the site runoff befire and after the project. Describe methods to be used to manage and/or treat runoff.