Laserfiche WebLink
<br /> <br /> <br />BMP: Sediment Trap ST <br />EARTH BERM W/ 1' DEPTH OF <br />DISTURBED GRAVEL SPILLWAY 2' TO 4' GRAVEL <br />AREA <br />SETTLING DEPTH <br />F? 2• IT <br /> <br />OBJECTIVES <br />bW UNDISTURBED <br />i AREA <br /> a Housekeeping Practices <br />SEDIMENT STORAGE- 3/4" to 1-1/2" WASHED GRAVEL T'3'. 000 (18' MIN.) <br />(1 FOOT MINIMUM) FOR FILTRATION OF DISCHARGE FLOOD OUTFALL <br />APRON 13 Contain Waste <br /> <br />C1 Minimize Disturbed Areas <br /> a Stabilize Disturbed Areas <br />6 WI". ? Protect Slopes/Channels <br />1• MIN ? Control Site Perimeter <br />Yh? .pn'•' • .?? TW}'? G <br />®Control Internal Erosion <br />SECTION THROUGH SPILLWAY <br /> <br />DESCRIPTION: <br />SL <br />A sediment trap is a small excavated or bermed area where runoff from small <br />A <br />drainage areas is detained and sediment can settle. <br /> SALT ME COUNTY <br />APPLICATION: <br /> <br />Temporary control for runoff from disturbed areas of less than 3 acres ENGINEERING DIVISION <br />. 2001 S. State Street N3300 <br />Temporary control for discharge from diversion dike, surface benching, or other Salt Lake City. UT S4F190-4600 <br />temporary drainage measures. Te! (8011468-11711 <br />INSTALLATION/APPLICATION CRITERIA: <br />• Design basin for site specific location. <br /> TARGETED POLLUTANTS <br />Excavate basin or construct compacted berm containment. <br />Construct outfall spillway with apron. w Sediment <br />Provide downstream silt fence if necessary. ? Nutrients <br /> m Toxic Materials <br />LIMITATIONS: o Oil & Grease <br />Should be sized based on anticipated runoff, sediment loading and drainage 13 Floatable Materials <br />area size. ? Other Waste <br />May require silt fence at outlet for entrapment of very fine silts and clays. <br />MAINTENANCE: ¦ High Impact <br />• Inspect after each rainfall event and at a minimum of monthly. m Medium Impact <br />Repair any damage to berm, spillway or sidewalls. 13 Low or Unknown Impact <br />R <br />emove accumulated sediment as it reaches 2/3 height of available storage. <br />Check outlet for sedimentation/erosion of downgradient area and remediate <br />as necessary. Install silt fence if sedimentation apparent. IMPLEMENTATION REQUIREMENTS <br /> m Capital Costs <br /> m O&M Costs <br /> 13 Maintenance <br /> D Training <br /> ¦ High m Medium O Low <br />Stormwater Discharge Management from Construction Activities <br />1999