2702 59TH ST SW 2024-07-05 - Laserfiche WebLink

DRAINAGE REPORT Miller Residence Drainage June 2023 • Storm Drain Inlet Protection (BMP C220) ELEMENT NO. 8 — STABILIZE CHANNELS AND OUTLETS The use of a temporary sediment pond, straw wattles, silt fence and other pollutant removal devices should be strictly adhered to by the contractor to ensure no sediment laden stormwater enters the roadway and city stormwater system. Any temporary outlets or swale should be adequately stabilized through the use of rock or other energy dissipation devices. ELEMENT NO. 9 — CONTROL POLLUTANTS All pollutants, including waste materials and construction debris, that occur on -site shall be handled and disposed of in a manner that does not cause contamination of stormwater. Good housekeeping and preventative measures will be taken to ensure that the site will be kept clean, well -organized, and free of debris. The following pollutant control measures will be applied on this project: • All vehicles, equipment, and petroleum product storage/dispensing areas will be inspected regularly to detect any leaks or spills, and to identify maintenance needs to prevent leaks or spills. ELEMENT NO. 10 — CONTROL DE -WATERING If necessary, the contractor shall submit a dewatering plan for the project. It is not anticipated that a dewatering plan will be necessary as below grade excavation is limited during construction. ELEMENT NO. 11— MAINTAIN BMPS All temporary and permanent erosion and sediment control BMPs shall be maintained and repaired as needed to assure continued performance of their intended function. Maintenance and repair shall be conducted in accordance with each particular BMP's specifications. All temporary erosion and sediment control BMPs shall be removed within 30 days after the final site stabilization is achieved or after the temporary BMPs are no longer needed. Trapped sediment shall be removed or stabilized on -site. Disturbed soil resulting from removal of BMPs or vegetation shall be permanently stabilized. ELEMENT NO. 12 — MANAGE THE PROJECT Erosion and sediment control BMPs for this project have been designed based on the following principles: • Design the project to fit the existing topography, soils, and drainage patterns. • Retain sediment on -site. • Thoroughly monitor site and maintain all ESC measures. • Emphasize protection of the critical areas and adjacent slough. The project will be managed according to the following key project components: Phasing of Construction XG/Watershed 20230616 Miller Drainage Report FINAL Page 9