Comp Plan 1974-1977 FILE #1 - Laserfiche WebLink

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4. Any soil treatment area other than seepage pits shall be set back the following distances if located in an area which has been designated as follows by any local, state or federal regulation: ~Regulation Set Back Distance in Feet Recreational development lakes 75* General development lakes and streams 50* Wild River 150' Scenic river 100' Critical river 100' Designated tributaries of wild, scenic and recreational rivers 75* *Required for new developments, and where practicable, for existing developments 5. Soil treatment areas shall not be placed in flood plains delineated by local ordinances adopted in compliance with the Statewide Standards and Criteria for ~anagement of Flood Plain Areas of Minnesota (MinS, R~ NR 85-93), or in areas 'for' which regional flood information is available fronl the Department of ~atural Resources. c. Design and Construction, l. The bottom of trenches and beds shall be at least four feet above the water table or bedrock. 2. The trenches shall be not less than 18 inches nor more than 36 inches wide, Any trench wider than 36 inches shall be considered a bed. 3. Trenches and beds shall be not more than 100 feet in length. 4, The bottom of the trench or bed excavation shall be level. 5. The bottom and sides of the trench or bed excavation to the level of the filter material shall be scarified to remove smears left by the construction equipment and footprints. All loose material shall be removed from the excavation. The bottom of tile excavation shall not be driven on or ~lalked on after scarification, 6. When the soil percolation rate at the bottom of the trench or bed is slower than 15 minutes per inch, nc vehicle or excavation equipment shall be allowed on the trench or bed area. Excavation shall be by back hoe or other means that allow the equipment wheels or tracks to remain on the surface soil. 15