The URL can be used to link to this page

Home My WebLink AboutSW6170603 - MIddleton Townes (4)Project Name: Project Location: tion,& Maintenance Agreement Middleton 'Townes Dunn, Harnett County, NC 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 ing O&M tables will 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) De aaaea auiom I Northern corner of property I 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. Robert P. Wellons President - RP Wellons Land & Development, LLC 2004 W. Cumberland St, Dunn, NC 28334 910-892-3123(o) 910-568-6505 rpwellons@wel lonsrealty.com Signature. r, � JJ Date. 6-Z& -.�- D 1 -7 I, --"'1k41k-Li IA C)GGksL-J,- a Notary Public for the State off �C County of ( �'n�la- do hearby certify that k be,y,4-- P hl.e uo,-, personally appeared before me this 06 day of nkcu l , 001-1 acknowledge the due execution of the Pperations and Maintenance Agreement Witness my hand and official sea], t� aew My commission expires and STORM -EZ 5/25/2017 Version 1 4 O&M Manual Page 1 of 4 Wet Detention,Pond Maintenance Requirements s 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 sod 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 rlprap 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 5/25/2017 Version 1 4 O&M Manual Page 2 of 4 I Wet Detention Pond Maintenance Requirements (Continued) 1 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 beaver Use traps to remove muskrats and consult a professional to remove 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 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 5/25/2017 Version 1 4 O&M Manual Page 3 of 4 Wet Detention Pond Design Suinniary Wet Pond Diagram WET POND ID FOREBAY MAIN POND Detention Pond Permanent Pool EI 213 Permanent Pool EI. 213 Temporary Pool EI 214 Temporary Pool EI 214 Pretreatment other No Clean Out Depth 4 Clean Out Depth: 5 than forebay9 Sediment Removal EI 209 Sediment Removal El. 208 Has Veg Filter9 No Bottom Elevation 208 Bottom Elevation- 207 STORM -EZ 5/25/2017 Version 1.4 O&M Manual Page 4 of 4