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STORMWATER MANAGEMENT PLAN (SWMP) <br />AND EROSION AND SEDIMENT CONTROL REPORT <br />} ~~ FOR <br />~ ` ST. VRAIN LAKE GRADING IMPROVEMENT PLANS <br />j ~ Page 10 <br />i, <br />~ ? 3. BMPs are installed up-gradient of significant surface disturbances to <br />` reduce the volume and velocity of runoff entering disturbed areas. <br />4. BMPs are installed down-gradient of significant surface disturbances to <br />reduce the volume, velocity, and sediment load of runoff generated in <br />disturbed areas as a result of precipitation events. <br />The erosion and sediment control strategy for a construction project is <br />. ~ dynamic. As phases of construction progress, the strategy and measures <br />i implemented must evolve to remain effective. <br />- ~ 1. Structural Practices <br />,; <br />Structural practices for this site include silt fences, erosion logs, rough <br />• ~ cut street control, diversion dikes, vehicular tracking control, and <br />sedimentation ponds. <br />' _ ~ Erosion controls and construction shalt be phased to be fully effective. <br />A vehicular tracking control device shall be installed prior to the <br />mobilization of construction equipment on-site. Prior to the clearing and <br />grubbing of the entire phased construction area, localized clearing shall <br />be performed for the placement of perimeter erosion control measures <br />(silt fences, erosion logs, etc.). Site clearing shall commence only after <br />• ~ perimeter erosion control measures are in place. <br />.; <br />Vehicle Tracking Controls (VTCs) are used in order to prevent <br />construction vehicles from tracking mud, soil and other debris onto <br />public roads. They consist of astone-stabilized pad placed at the <br />' ' exit of the site. When vehicles move over the pad, the rough <br />surface shakes loose any mud and debris that may have been <br />carried into the public right of way. VTCs will be located wherever <br />the site borders a public right-of-way, street, alley, or parking area or <br />any point where vehicular traffic will ~ccess the site while roads and <br />utilities are under construction. <br />,. <br />i. <br />ai <br />