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Sequencing <br />1 <br />Sequent ng Table <br />1 <br />2 <br />3 <br />4 <br />5 <br />Construction Activity <br />Schedule Consideration <br />Identify and label protection areas (e.g.. <br />buffer zones, filter strips, trees). <br />Site delineation should be completed before <br />construction begins. <br />Construction access. Construction entrance, <br />construction routes, equipment parking areas <br />and cutting of vegetation (necessary <br />perimeter controls). <br />First land- disturbing activity — Establish protected <br />areas and designated resources for protection. <br />Stabilize bare areas immediately with gravel and <br />temporary vegetation as construction takes place. <br />Sediment traps and barriers. Basin traps, <br />sediment fences, and outlet protection <br />(necessary perimeter controls). <br />Install principal basins after construction site is <br />accessed Install additional traps and barriers as <br />needed during grading. <br />Runoff control. Diversions, silt fence, <br />perimeter dikes, water bars, and outlet <br />protection. <br />Install key practices after principal sediment traps <br />and before land grading. Install additional runoff <br />control measures during grading. <br />Runoff conveyance system. Stabilize stream <br />banks, storm drains, channels, inlet and <br />outlet protection, and slope drains. <br />Where necessary, stabilize stream banks as early as <br />possible. Install principal runoff conveyance <br />system with runoff-control measures. Install <br />remainder of system after grading. <br />Grubbing and grading. Site preparation: <br />cutting, filling and grading, sediment traps, <br />barriers, diversions, drains, surface <br />roughening. <br />Begin major grubbing and grading after principal <br />sediment and key runoff control measures are <br />installed. Clear borrow and disposal areas only as <br />needed. Install additional control measures as <br />grading progresses. <br />Surface stabilization: temporary and <br />permanent seeding, mulching, sodding and <br />installing riprap. <br />Apply temporary or permanent stabilization <br />measures immediately at all disturbed areas where <br />work is delayed or complete. <br />Building construction: buildings, utilities, <br />paving. <br />Install necessary erosion and sedimentation control <br />practices as work takes place. <br />Landscaping and final stabilization: <br />topsoiling, planting trees and shrubs, <br />permanent seeding, mulching, sodding, <br />installing riprap. <br />Last construction phase - Stabilize all open areas, <br />including borrow and spoil areas. Remove and <br />stabilize all temporary control measures. <br />1 Maintenance <br />Maintenance inspections should be performed <br />weekly, and maintenance repairs should be made <br />immediately after periods of rainfall. <br />7 <br />9 <br />Source: MPCA , 2000 <br />Metropolitan Council /Barr Engineering Co. 3-67 <br />