09.02 City Road Specifications - Laserfiche WebLink

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City of Pequot Lakes Road Construction Specifications All improvements of roads within the right-of-ways shall be planned for and accomplished in accordance with current highway design standards and as defined by the following minimum construction standards: 1. Sufficient clearing and grubbing shall be done to provide adequate snow storage area during winter maintenance. Generally,the entire right-of-way shall be cleared except to save desirable timber and other vegetation. Stumps and debris shall be properly disposed of outside the limits of the roadbed, and all rocks larger than three inches (3") shall be disposed of by burial outside the limits of the roadbed. 2. The roadbed shall be constructed in the center of the platted right-of-way except under extreme conditions where a minimum of twenty feet(20') shall be maintained from the centerline of the roadbed to the right-of-way limits. 3. The roadbed width shall be twenty-four feet(24'), shoulder to shoulder with a twenty-two foot(22')paved driving surface. It shall be adequa.tely crowned to drain surface water laterally to prevent standing water from saturating the roadbed. 4. Care shall be ta.ken in the selection of soils used in the construction of embankments insofar as possible,using the best materials available for the upper portion of the embankments and the proper soils placed in the lower portion. Unsuita.ble soil (such as swamp materials) shall be disposed of outside the roadbed shoulder lines.Embankments sha11 be constructed in layers not to exceed six inches (6") in plastic soils or twelve inches (12") in non-plastic soils,with proper compaction applied to each layer until no evidence of further consolidation e�sts. Embankments constructed over low wet areas shall be placed in one lift to an elevation at least one foot(1')above water elevation before proceeding with layer construction as previously defined. 5. Side ditch and embankment construction shall provide adequa.te roadbed drainage, including installation of centerline culverts as required. Inslopes shall not be construction steeper than three feet(3')horizontally to one foot(1')vertically(3:1), except in extremely high fill sections where a 2:1 slope may be accepta,ble. Backslopes shall not be constructed steeper than two feet(2')horizontally to one foot(1')vertically(2:1), and the top of the backslope sha11 be blended into the natural ground line. On all roadbed cut and fill areas in excess of seven feet(7'), additional right-of-way or slope easements sha11 be considered in order to construct proper slopes to prevent serious erosion. Adopted by City Council Apri17, 2015 1