The URL can be used to link to this page

Home My WebLink AboutSW3170601_O&M Agreement Form_20170606Project Name: Project Location: ration & Maintenance Agreement MOORE-FARMS_SUBDIVISION - - WAXHAW INDIAN TRAIL ROAD, UNION-COUNTY-N.C. Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the BMP(s). The BMP(s) on this project include (check all that apply & cc Bioretention Cell Quantity. Dry Detention Basin Quantity, Grassed Swale Quantity, Green Roof Quantity: Infiltration Basin Quantity. Infiltration Trench Quantity - Level SpreaderNFS Quantity - Permeable Pavement Quantity - Proprietary System Quantity: Rainwater Harvesting Quantity: Sand Filter Quantity: Stormwater Wetland Quantity: Wet Detention Basin Quantity: Disconnected Impervious Area Present - User Defined BMP Present: ding O&M tables wil Location(s). Location(s). Location(s) Location(s): Location(s): Location(s): Location(s): Location(s): Location(s). Location(s). Location(s). Location(s): Location(s)- Location(s): Location(s)- I be added automatically). Lot 40, Lot 62; Lot -111,- Lot_197 I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to the system or responsible party. * Responsible Party Title & Organization Street address: City, state, zip Phone number(s). Email: Mel Graham - Manager / Graham Enterprises of the Carolinas, LLC - 8801=A Longview Club -Drive Wax -haw,- Na- 28173__ (70) 55=5338 mel@grahamenterpries.org = Signature: Date: 10*Wllr I, � rn I h/ /.Sq 4 a Notary Public for the State of /Uor4t 0—afo%Nik County of - n I,a h do hearby Marek that _m P Iy,l r l .i ham g personally appeared before me this l ®� day of / v l a r e k ®/ 7 and acknowledge the due execution of the ¢perations and�Maigtena7ce Agreement Witness my hand and official seal, Version 14 Z` §J a Q010 �\A a > oO\moo G� ? v i Jam\ O My commission expires O&M d1lud 3/13/2017 Page 1 of 5 Wet Detention Pond Maintenance Requirements The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. Important maintenance procedures: _ Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). _ No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. _ Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin _ If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. - Once a year, a dam safety expert should inspect the embankment After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County) Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How I will remediate the problem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the BMP Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then plant a erosive gullies have formed. ground cover and water until it is established. Provide lime and a one- time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of approximately six inches. long. The inlet device The pipe is clogged. Unclog the pipe. Dispose of the sediment off-site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to smooth it over and provide erosion swale. control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or Remove sediment and replace with clean stone. covered in sediment (if applicable). The forebay Sediment has accumulated to Search for the source of the sediment and remedy the problem if a depth greater than the possible. Remove the sediment and dispose of it in a location where it original design depth for will not cause impacts to streams or the BMP. sediment storage. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems Weeds are present. Remove the weeds, preferably by hand If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional practices show that pruning is needed to maintain optimal plant health Plants are dead, diseased or Determine the source of the problem: soils, hydrology, disease, etc. dying. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying STORM -EZ 03/10/2017 Version 14 0&M Manual Page 3 of 5 Wet Detention Pond Maintenance Requirements (Continued) The main treatment area Sediment has accumulated to Search for the source of the sediment and remedy the problem if a depth greater than the possible. Remove the sediment and dispose of it in a location where it original design sediment will not cause impacts to streams or the BMP. storage depth. Algal growth covers over 50% Consult a professional to remove and control the algal growth. of the area. Cattails, phragmites or other Remove the plants by wiping them with pesticide (do not spray). invasive plants cover 50% of the basin surface. The embankment Shrubs have started to grow Remove shrubs immediately on the embankment. Evidence of muskrat or Use traps to remove muskrats and consult a professional to remove beaver activity is present. beavers. A tree has started to grow on Consult a dam safety specialist to remove the tree. the embankment. An annual Inspection by an Make all needed repairs appropriate professional shows that the embankment needs repair. (if applicable) The outlet device Clogging has occurred Clean out the outlet device. Dispose of the sediment off-site The outlet device is damaged Repair or replace the outlet device The receiving water Erosion or other signs of j Contact the local NC Department of Environment and Natural damage have occurred at the Resources Regional Office. outlet The measuring device used to determine the sediment elevation shall be such that It will give an accurate depth reading and not readily penetrate Into accumulated sediments. STORM -EZ 03/10/2017 Version 1 4 O&M Manual Page 4 of 5 Wet Detention Pond Design Summary ! Wet Pond Diagram WET POND ID 1 FOREBAY Permanent Pool EI 600 MAIN POND Permanent Pool EI. 600: 60125 Temporary Pool EI: 60125 Temporary Pool EI Pretreatment other No Clean Out Depth. 4.5 Clean Out Depth 4.5 595"5 than forebay? Sediment Removal EI 595 5 Sediment Removal EI. 595 Has Veg. Filter? Yes Bottom Elevation. 595 Bottom Elevation WET POND ID FOREBAY MAIN POND 2_ Permanent Pool EI 620 _ " Permanent Pool EI. 620 Temporary Pool El: 6215 Temporary Pool EI. 6215 Pretreatment other No Clean Out Depth 7 Clean Out Depth 7 than forebay? Sediment Removal El, 613 Sediment Removal EI. 613 Has Veg. Filter? Yes Bottom Elevation: 612:5 Bottom Elevation: 612-5 WET POND ID 3 FOREBAY Permanent Pool El. 61-35 MAIN POND Permanent Pool EI 6135 Temporary Pool EI: 614 75 . Temporary Pool EI. 61476- 1475- Pretreatment other Pretreatment Clean Out Depth 4.5 Clean Out Depth 5 No than forebay? Sediment Removal EI 609 Sediment Removal EI 608 5 Has Veg Filter? Yes Bottom Elevation: 6085 Bottom Elevation 608 - WET POND ID FOREBAY MAIN POND 4 - Permanent Pool EI 614 Permanent Pool EI 614 Temporary Pool EI: "615.02 Temporary Pool EI: 61502 Pretreatment other No Clean Out Depth 6 Clean Out Depth 6 than forebay? Sediment Removal El- 608- Sediment Removal EI 608. Has Veg. Filter? Yes Bottom Elevation: 6075 Bottom Elevation 6075 STORM -EZ 03/10/2017 Version 1.4 O&M Manual Page 5 of 5