Parking lot project manual-1992 - Laserfiche WebLink

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' 8. SITE GRADING , WORK UNDER THIS SECTION SHALL INCLUDE ALL WORK NECESSARY TO PROPERLY ' CONSTRUCT THE PARKING LOT, DRIVEWAY AND HOLDING POND AS SHOWN ON THE DRAWINGS AND IN ACCORDANCE WITH SECTION 2105 OF TNE 1988 MNDOT SPECIFICATIONS AS MODIFIED BELOW. A. TOPSOIL ' I ALL TOPSOIL SHALL BE REMOVED FROM THE PARKING LOT, DRIVEWAY AND ' HOLDING POND AREAS WHILE PRESERVING ANY EXISTING VEGETATION AS NOTED ON THE PLAN. ADEQUATE TOPSOIL SHALL BE STOCKPILED TO PROVIDE 6" TOPSOIL FOR PLACEMENT ON ALL DISTURBED AREAS. ' B. EXCAVATION AND PLACEMENT/COMPACTION SHALL BE DONE AS NECESSARY TO CONSTRUCT THE PARKING LOT, DRIVEWAY AND HOLDING POND AS SHOWN ON THE ' DRAWINGS, LN GENERAL, THE AREA TO BE EXCAVATED FOR THE PARKING LOT EXISTS ON RELATIVELY FLAT GROUND (SLOPES FROM 2 - 3.5X) . THE OUTER EDGES OF THE AREA DRAIN ONTO THE SITE AND FOLLOWS A BROAD WESTERLY OVERFLOW OVER AN EXISTING DRIVEWAY. DUE TO THE PERIODIC�tLLY WET ' NATURE OF THE SITE, SOME EXCAVATION OF NON-COMPACTIBLE SOILS MAY BE NECESSARY. REFER TO THE ENCLOSED SOILS REPORT SECTION C.5 FOR RECOMMENDED SUBGRADE PR�PARATION. ' THE NEW AGGREGAT� DRIVEWAY SHALL BE GRADED INTO AN EXISTING SLOPE RANGING FROM 10-20X THAT DRAINS INTO THE NORTH DITCH OF C0. RD. 51 . CUTS SHOULD AVERAGE AROUND 3.5 - 4 FEET DEEP FOR THE DRIVEWAY AREA. ' FIELD EVALUATION BY THE ENGINEER SHALL DETERMINE WHETHER OR NOT ANY EXCAVATED MATERIAL CAN BE USED AS FILL FOR THE PARKING LOT GRADING. THE HOtDING POND SITE IS LOCATED WITHIN A LOW AND PERIODICALLY ' FLOODED WETLAND AREA. THE BOTTOM OF PROPOSED HOLDING POND IS TO BE EXCAVATED 6 FEET BELOW EXISTING GRADES. SOILS IN THIS AREA CAN BE t EXPECTED TO BE HYDRIC IN NATURE. THE SITE CONNECTS TO A LARGER MARSH AREA LOCATED TO THE NORTH VIA A CULVERT UNDER C0. RD. 51 . C. PUMPING OR BAILING ' IF, DURING THE CONSTRUCTION, WATER SHALL BE FOUND OR WATER FILLS TRENCHES OR BOTT�1 OF EXCAVATIONS BY REASON OF GROUNDWATER, RAIN OR ' ANY OTHER CAUSE, THE SAME SHALL BE PUMPED OR BAILED BY THE CONTRACTOR AND EXCAVATIONS KEPT FREE FROM WATER WITHOUT EXPENSE TO THE OWNER UNTIL COMPLETION OF THE WORK. D. SURPLUS MATERIALS ' ANY SURPLUS EXCAVATED MATERIAL SHALL BE DISPOSED OF BY THE CONTRACTOR , AT HIS EXPENSE AT AN APPROPRIATE DISPOSAL AREA OFF SITE. E. FINISH GRADING ' SITE GRADING SHALL BE FINISHED IN A WORKMANLIKE MANNER, TRUE TO GRADE WITHIN 0.1 FOOT OF FINISH GRADE AS SHOWN ON THE DRAWINGS. A BLADE ' GRADER AND A HEAVY (STEEL H) BEAM DRAG SHALL BE USED, AS REQUIRED, DURING FINISH GRADING OPERATIONS. SECTION D I PAGE 2 OF 4