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HomeMy WebLinkAboutSW8131209_HISTORICAL FILE_20220831STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 I�120 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS © HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE Z,b7.Z o w 31 YYYYMMDD Permit Number: (to be provided by DWO) Drainage Area Number: Filter Strip, Restored Riparian Buffer and Level Spreader Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will 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 removal efficiency of the BMP. Important maintenance procedures: Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC, 1993). Forested filter strips do not require this type of maintenance. Once a year, the soil will be aerated if necessary. Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire filter strip Trash/debris is present. Remove the trash/debris. -system The flow splitter device The flow splitter device is Unclog the conveyance and dispose (if applicable) clogged. of any sediment off -site. The flow splitter device is Make any necessary repairs or damaged. replace if damage is too large for repair. rCEIVE JAN0 8 2014 BY: Form SWU40I-Level Spreader; Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 Of 3 BMP element: Potentialproblem: How I will remediate theproblem: The swale and the level The swale is clogged with Remove the sediment and dispose lip sediment. of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a berm end of the level spreader that that is higher than the level lip, and shows storm water has then plant a ground cover and bypassed it. water until it is established. Provide lime and a one-time fertilizer a plication. Trees or shrubs have begun Remove them. to grow on the swale or just downslo e of the level lip. The bypass channel Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then reestablish proper erosion control. Turf reinforcement is Study the site to see if a larger damaged or ripap is rolling bypass channel is needed (enlarge if downhill. necessary). After this, reestablish the erosion control material. The filter strip Grass is too short or too long Maintain grass at a height of f applicable). approximately three to six inches. Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed, remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Sediment is building up on Remove the sediment and the filter strip. restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Plants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water: The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality local Regional Office, or the outlet. 1 401 Oversight Unit at 919-733-1786. Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3 y Permit Number: (to be provided by DTVQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:P-726 Regional Communication Station BNIP drainage area number: Print name: 1 I -A, Title: P2i rVitirt- h/-,ks (Jams,,/ Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. E County of day of , and forgoing filter strip, riparian buffer, and/or Witness my hand and official seal, LLEY VANDECOEVERING NOTARY PUBLIC ONSLOW COUNTY STATE OF NORTH CAROLINA SEAL My commission expires t t a Notary Public for the State of do hereby certify that personally appeared before me this4a owledge the due execution of the requirements. Form SWU40I-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 , Page 3 of 3 PermitNumber: (to be provided by DWQ) Drainage Area Number: Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record win 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 removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ® does ❑ does not This system (check one): ® does ❑ does not incorporate a vegetated filter at the outlet. incorporate pretreatment other than a forebay. 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 p maximum extent practical. E' Eg Vv — Once a year, a dam safety expert should inspect the embankment DEC 16 2013 After the wet detention pond is established, it should be inspected once 'onth and within 24 hours after every storm event greater than 1.0 inches (or 1.5 i ti &es -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: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris: The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the gully, and then plant a 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 long. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4 _ - Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog.the pipe. Dispose of the Swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the Swale if necessary to Swale. smooth it over and provide erosion control devices such as reinforced turf matting or.riprap to avoid future problems with erosion. The forebay Sediment has accumulated to . Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. 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 show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. 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. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or, the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. DEC 16 2013 Form SW401-Wet Detention Basin O&M-Rev.4 {jV: Pam ge L Ot 4 Permit Number: (to be provided by UWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has, started to grow on Consult a dani safety specialist to the embankment. remove the tree. An arinual 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 Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. 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. When the permanent pool depth reads 5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 22:5 feet in the forebav, the sediment shall be removed. Sediment Removal Bottom BASIN DIAGRAM I. ill in the blanks) Permanent Pool Elevation 10_50 Pe manen Pool --------- Volume L Sediment Removal Elevation 5.5 Volume -ft Min. ----------------------------- ------------- ------ Sediment Bottom Elevation 4.5 I-ft r Storage Sedimei Storage FOREBAY MAIN POND Form SW401-Wet Detention Basin O&M-Rev.4 FOEHVE DEC 16 2013 Pape 3 of 4 E3Y: Permit Number: (m be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:P-726 Regional Communication Station 6MP drainage area number: Print "I-itle:Deputy Public Works Officer Address:Bldg 1005 Michael Rd Camp Lejeune. NC 28542 Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president., �f a Notary Public for the State of County of U YVID W w do hereby certify that personally appeared before me this 2� day of jV6\) , UV5 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, KELLEY VANDECOEVERIN01 NOTARY PUBLIC ONSLOW COUNTY STATE OF NORTH CAROLINA SEAL My commission expires 13 IV,w ( _, F W/ E DEC 16 2013 ----- Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 UEMLH USE ONLY Date eceiv d Fee Paid Permit Number I NC DEO Division of Energy, Mineral and Land Resources STATE STORMWATER: PERMIT RENEWAL APPLICATION FORM In accordance with 15A NCAC 2H.10450, the current permil holder shall renew their high density permit 180 days prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781) Sectlbn 60.(c). This application form is for permit renewals only. A. PROJECT INFORMATION 1. State Stormwater Permit Number: SW8 131209 2. Project name: Regional Comm. Station and CH53K Maint Bldg MCAS NR 3. Project street address: XXX City: MCB Camp Leieune County: Onslow ZIP: 28542 4. What, if any, changes have been made to the project as permitted? If the project has changed from the original approved plans, please complete SWU-101 for a Major Modification or Minor Modification Application form available at: httns://deg.nc.cov/about/divisions/e B. PERMITTEE INFORMATION If changes to the permittee or project name have been made, please complete either the Permit Update form or the Permit Transfer form available at: https://deo.nc.aov/aboutldivisionWenerakmineral-lend- State Stormwater Permits do not with the sale of the 1. Current Permit Holder's Company Name/Organization: MCB Camp Leieune 2. Signing Official's Name: Neal Paul 3. Signing Official's Title: Deputy Public Works Division 4. Mailing Address: MCB Camp L.ejeune 1005 Michael Rd. City: MCB Camp Leieune State: NC ZIP: 28547.2521 5. Street Address: City: State: ZIP 6. Phone: (910) 451-2213 Email: neal.paul@usmc.mil Stormwater Permit Renewal Form Page 1 of 3 � _ AUG 10 2022 i Mays I, 2018 .,5';s.3 .. � -tt.c .y:..+ 9: "':,:.J� rf'--. �,_'•"� zic•'. �„ �. �...'^, t' i•jy'�. � � �� �' -M1? C. SUBMITTAL REQUIREMENTS Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HOW/ORW). Only applications packages that include all required items listed below will be accepted and reviewed. Initial each item below to indicate that the required information is provided in the application package: MCT 1. A permit application processing fee of $505.00 payable to NCDEO. . MCT 2. One original signed hard copy and one electronic copy of this completed form. The signing official named on this application to represent the current permittee must meet one of the following: a. Corporation — a principle executive officer of at least the level of vice-president; b. Limited Liability Company (LLC) - a manager or company official as those terms are defined in G.S. 57D "North Carolina Limited Liability Company Act;' c. Public Entity— a principal executive officer, ranking official, or other duly authorized employee; d. Partnership or limited partnership — the general partner; e. Sole proprietor; or I. Letter of authorization signed by one of the signatories noted in a — e above authorizing the signature of another entity. MCT 3. One hard copy and one electronic copy of recorded documents required by the original permit that have not yet been received by DEMLR, including: deed restrictions, protective covenants, condominium/planned community declaration and easements. If the project has been built, include documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If the project has not been built, include a signed agreement that the final recorded deed restrictions and protective covenants will be submitted at a later date. MCT 4. O&M Agreements, Please select one: ® I have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to keep this on file with the permit; or ❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am. requesting a copy be sent to me. I agree to keep this on file with the permit. MCT 5. Desii er Certifications, Please select one: IF A copy of the certification(s) confirming that the project was built in accordance with the approved plans have been previously provided to the Division; or ❑ A copy of the certification(s) confirming that the project was built in accordance with the approved plans are enclosed; or ❑ The project has not yet been built. MCT 6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a signed, sealed, and dated letter from a licensed professional stating that the SCMs have been inspected, and that they have been built and maintained in accordance with the permit. 7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide one hard copy and one electronic copy of documentation from the NC Secretary of State, or other official documentation, which supports the titles and positions held by the persons listed in Section C.2 per 15A NCAC 2H. 1043(3)(b). Slormwater Permit Renewal Application Form Page 2 of 3 CC 1tr G� 0 &► i,9-.. AUG 10 2022 By: May-1 1, 2018 o r &a' ru'-G... , .'ll'J sr f `r .. _ y „w t. •'1v. y �' <�° t � m o D. PERMITT E'S CERTIFICATION I, T A Lw'ke the person legally responsible for the permit, certify that I have a copy of the Permit and O&M Agreement on site (or I will obtain a copy and it will be kept on site), that I am responsible for the performance of the maintenance procedures, and the site has been and will be maintained according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs or buiit-upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my knowledged comp te. Signature: Date: 7 ZO Zv NOTARIZATION: I— t� I V Q � 1 a Notary Public for the State of NWAAX D&MIUV%6- ,County of f)riSloV.f do hereby certify that P..• " V-d 6-Ly, personally appeared before me this the ` day of c�11 lam, 20, and acknowledge the due execution of the forgoing instrument. Witness my hand and official seal, Slormwater Permit Renewal Application Form Page 3 of 3 AUG 1p 2022 A May 41. 2018 Ii.y kJ �iY �. *�'_ � ec.... .A"•`. '�v,t,�,'��,� ..^. ._� 91,�_ �'n%J3 �f'Y' :i." �.. ..- «°,�.[C'��� +5,:• �ix"7 u �: �V�'� Permit No. S W Y/3/Z0(�-) (lo be mvdetl by DWO) NCDENR Project name Contact person Phone number Date Drainage area number 020E W A r f;9 o STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This lone must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information. II. DESIGN INFORMATION Site Characteristics Drainage area 219,556 tt' Impervious area, post -development 137,650 ft %impervious 62.69 % Design rainfall depth 1.5 in Storage Volume: Non -SA Waters - Minimum volume required Volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Peak Flow Calculations Is the prelpost control of the 1yr 24hr storm peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr stone Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow PrelPost 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHWT elevation (approx. at the perm. pool elevation) Top of 1Oft vegetated shelf elevation Bottom of 10ft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment deanout, bottom elevation Sediment storage provided Is there additional volume stored above the state -required temp. pool? Elevation of the top of the additional volume Comm Station and CH53K 16,856 ft' 20,154 ft OK, volume provided is equal to or in excess of volume required. it, ft3 it, ft3 y (Y or N) 3.6 in 0.36 limitless) 0.69 (unidess) 5.87 iNhr OK 10.78 ft'Isec 22.37 ft'Isec 11.59 ftlisec 12.00 fmsl 10.50 fmsl 10.50 fmsl 41.00 fmsl 10.00 fmsl 5.30 fmsl 4.00 fmsl 1.30 it N (Y or N) frost OCT 0 3 2014 ®r Form SW401-Wet Detention Basin-Rev.94118112 Parts I. a tl. Design Summary, Page 1 of 2 i Permit (to be prov.Ved by DWG) II. DESIGN INFORMATION Surface Areas Area, temporary pool 16,158 ft' Area REQUIRED, permanent pool 9,880 if SAIDA ratio 4.50 (unitless) Area PROVIDED, permanent pool, Ate,,,,. 10,646 ft" OK Area, bottom of 1 Oft vegetated shelf, A._,,, 8,480 IF Area, sediment cleanout, top elevation (bottom of pond), Ate. 1,832 ft' Volumes Volume, temporary pool 20,154 ft3 OK Volume, permanent pool, Vr, -. 26,576 ft3 Volume, forebay (sum of forebays if more than one forebay) 4,806 ft' Forebay %of permanent pool volume 18.1% % OK SAIDA Table Data Design TSS removal 85 % Coastal SAIDA Table Used? Y (Y or N) Mountain/Piedmont SAIDA Table Used? N (Y or N) SAIDA ratio 4.50 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) N (Y or N) Volume, permanent pool, Vce,,,, PW 26,576 ft' Area provided, permanent pool, A.. 10,646 ft' Average depth calculated It Need 3 ft min. Average depth used in SAIDA, dr, (Round to nearest 0.511) ft Calculation option 2 used? (See Figure 10-2b) Y (Y or N) Area provided, permanent pool, A.. 10,646 ft' Area, bottom of 1 Oft vegetated shelf, A._. 8,480 ft' Area, sediment cleanout, top elevation (bottom of pond), Ate. 1,832 f? 'Depth' (distance blw bottom of 1Oft shelf and top of sediment) 4.70 It Average depth calculated 3.31 It OK Average depth used in SAIDA, d., (Round to down to nearest 0.5ft) 3.5 It OK Drawdown Calculations Drawdown through orifice? Y (Y or N) Diameter of orifice (if circular) 2.00 in Area of orifice (if -non -circular) in' Coefficient of discharge (Cc) 0.59 (unitless) Driving head (He) 1.50 ft Drawdown through weir? N (Y or N) Weir type (unitless) Coefficient of discharge (C.) (unitless) Length of weir (L) ft Driving head (H) ft Pre -development 1-yr, 24-hr peak flow 10.78 ft3/sec Post -development 1-yr, 24-hr peak flow 22.37 ft3/sec Storage volume discharge rate (through discharge onfice or weir) 0.07 ft3/sec Storage volume drawdown time Additional Information 2.64 days draws down in 2-5 day OK, s. fw. � (j `t 1� �� � N4 Vegetated side slopes Vegetated shelf slope 3 :1 10 :1 OK OK OC Iy U 9 6 20% Vegetated shelf width 10.0 ft OK Length of flowpath to width ratio 3 :1 OK BY:�- Length to width ratio 4.8 :1 OK Trash rack for overflow & orifice? Y (Y or N) OK Freeboard provided 1.0 ft OK Vegetated filter provided? Y (Y or N) OK Recorded drainage easement provided? N (Y or N) Insufficient. Recorded drainage easement required. Capures all runoff at ultimate build -out? Y (Y or N) OK Drain mechanism for maintenance or emergencies is: pump out Form SW401-Wet Detention Basin-Rev.9.4118112 Parts I. & II. Design Summary, Page 2 of 2 Permit No. %0 r/ / ✓ / 0C / (to be pro hoed by DWO) AMA�pF "A TEA G Hl C STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form most be filled out, printed and submitted. The Required Items Checklist (Part Ili) must be printed, filled out and submitted along with all of the required information. IfiP.ROJECTiINF.ORMATION a„,".:",,. .1:':: W ,. .in-. +. _�.:�nr�``.t ..x�.:: �; .,.., S'%al:.�;,'."'w`a'.3 Project name P-726 Regional Communication Station Contact person Crystal Hill, PE Phone number 804-822-3020 Dale 27-Dec-13 Drainage area number 1 III: '.DESIGN INFORMATION a' -- Site Characteristics Drainage area 227,819 rye Impervious area, post -development 137.650 rye %impervious 60.42 % Design rainfall depth 1.5 in Storage Volume: Non-SAWaters Minimum volume required 16,909 ft3 Volume provided 20,154 ft3 OK, volume provided is equal to or in excess of volume required. Storage Volume: SA Waters 1.5' runoff volume ft3 Pre -development 1-yr, 24-hr runoff ft3 Post -development 1-yr, 24-hr runoff ft3 Minimum volume required ft3 Volume provided ft3 Peak Flow Calculations Is the preipost control of me tyr 24hr storm peak flaw required? y (Y or N) 1-yr, 24-hr rainfall depth 3.6 in Rational C, pre -development 0.36 (unitless) Rational C, post -development 0.69 (unitless) Rainfall intensity: 1-yr, 24-hr storm 5.87 in/hr OK Pre4evelopment 1-yr, 24-hr peak flow 10.78 ft'lsec Post -development 1-yr, 24-hr peak flow 22.37 ft'Isec Pre/Post 1-yr, 24-hr peak flaw control 11.59 ft'Isec Elevations Temporary pool elevation 12.00 hnsl �' �' VE Permanent pool elevation 10.50 host SHWT elevation (approx. at the perm. pool elevation) 10.50 turd ��� O C 20�� Top of 10ft vegetated shelf elevation 11.00 hnsl U Bottom of 1 Oft vegetated shelf elevation 10.00 hnsl Sediment deanout, top elevation (bottom of pond) 5.30 host Sediment deanout, bottom elevation 4.00 hnsl BY:. ------- Sediment storage provided 1.30 It Is there additional volume stored above the state -required temp, pool? N (Y or N) Elevation of the top of the additional volume hnsl Form SW401-Wet Detention Basin-Rev.9-0/1 all Pans I, a II. Design Summary, Page 1 of 2 r Permit ((o be pmvitlea by DWO) ILDESIGN INFORMATION Surface Areas Area, temporary pool 16,158 ft Area REQUIRED, permanent pool 10,252 fe SNDA rate 4.50 (unitless) Area PROVIDED, permanent pool, A,,,,-„d 10,646 ft" OK Area, bottom of 10ft vegetated shelf, Amue„r 8,480 ft" Area, sediment deanout, top elevation (bottom of pond), Am, 1,832 f? Volumes Volume, temporary pool 20,154 ft' OK Volume, permanent pool, V,, 26,576 ft' Volume, foebay, (sum of forebays if more than one forebay) 4,806 ft' Foebay% of permanent pool volume 18.1% % OK SNDA Table Data Design TSS removal 85 % Coastal SNDA Table Used? y (Y or N) Mountain/Piedmont SNDA Table Used? n (Y or N) SNDA ratio 4.50 (unitless) Average depth (used in SNDA table): Calculation option 1 used? (See Figure 1D-2b) n (Y or N) Volume, permanent pool, V,, ., 26,576 ft' Area provided, permanent pod, A,,,,,, 10.646 fl' Average depth calculated ft Need 3 ft min. Average depth used in SNDA, dw, (Round to nearest 0.5ft) If Calculation option 2 used? (See Figure 10.2b) y (Y or N) Area provided, permanent pod, A,,,,,,u 10,646 ft' Area, bottom of 1 Oft vegetated shelf, AwLwam 8,480 fir Area, sediment cleanout, top elevation (bottom of pond), A� ,,,,, 1,832 f? 'Depth" (distance b)w bottom of 10ft shelf and top of sediment) 4.70 ft Average depth calculated 3.31 ft OK Average depth used in SNDA, dw, (Round to down to nearest 0.5ft) 3.5 ft OK Drawdown Calculations Drawdown y or N) C E'VE Diameter of orifice (if circular) in 2.00 in C Area of orifice (if-non-dreular) in' Coefficient of discharge (Co) 0.59 (unitless) 1AN 0 6 2014 Driving head (HJ 1.50 ft Drawdown through weir? n (Y or N) BY' Weir type (unitless) Coefficient of discharge (C„) (unitless) Length of weir (L) It Droving head (H) If Predevelopment 1-yr, 24-hr peak flmv 10.78 ft'Isec Post -development 1-yr, 24-hr peak flow 22.37 ft'/sec Storage volume discharge rate (through discharge orifice or weir) 0.07 ft'/sec Storage volume drawdown time 2.64 days OK, draws down in 2-5 days. Additional Information Vegetated side dopes 3 :1 OK Vegetated shelf slope 10 :1 OK Vegetated shelf width 10.0 it OK Length of flowpath to width ratio 3 :1 OK Length to width ratio 4.8 :1 OK Trash rack for overflow 8 orifice? y (Y or N) OK Freeboard provided 1.01t OK Vegetated filter provided? y (Y or N) OK Recorded drainage easement provided? n (Y or N) Insufficient. Recorded drainage easement required. Capures all runoff at ultimate build-ou@ y (Y or N) OK Drain mechanism for maintenance or emergencies is: pump out Fonn SW401-Wet Detention B8sin-Rev.9N1&12 Pans I. a 0. Design Summary, Page 2 of 2 Permit (to be provided by DWQ) Ill." REQUIRED, ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Init' Is Sheet No. -Cot C-302 C-102 C►� C-60 �1.� flT ^II II Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, High Flow bypass system, Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: - Outlet structure with trash rack or similar, - Maintenance access, - Permanent pool dimensions, - Forebay and main pond with hardened emergency spillway, - Basin cross-section, - Vegetation specification for planting shelf, and - Filter strip. 3. Section view of the wet detention basin (1" = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay, to verify volume provided. 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. 7. The supporting calculations. 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. 9. A copy of the deed restrictions (if required). 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. E(,'FIVE DEC 16 2013 Form SW401-Wet Detention Basin-Rev.9-4/18/12 Part III. Required Items Checklist, Page 1 of 1 AVA $�w4rE9 NCDENR r STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT This form must be completely filled out, printed, initialed, and submitted. I1.111P,R01J ECTON FORMATION Project name P-726 Regional Communication Station Contact name Crystal Hill Phone number 804-822-3020 Date December 27, 2013 Drainage area number 1 I I qD ESIG NI INEORMATI O N The purpose of the LS-VFS Other: Explained, below Slomnvater enters LS-VFS from A BMP Type of VFS Engineered filler ship (graded 8 sodded, slope <8%) Explanation of any "Other responses above Vegetative Filter Strip Required for Wet Detention Basin with 85%TSS If Stormwaler Enters the LS-VFS from the Drainage Area Drainage area Do not complete this section of the form. ' Impervious surface area ft, Do not complete this section of the form. Percent impervious % Do not complete this section of the form. Rational C coefficient Do not complete this section of the form. Peak flow from the 1 inlhr stone cfs Do not complete this section of the form. Time of concentration min Do not complete this section of the form. Rainfall intensity, 10-yr storm inmr Do not complete this section of the form. Peak flow from the 10-yr storm cfs Do not complete this section of the form. Design storm Maximum amount of flow directed to the LS-VFS cfs Do not complete this section of the form. Is a flow bypass system going to be used? (Y or N) Do not complete this section of the form. Explanation of any *Other"responses above If Slormwaler Enters the LS-VFS from a BMP Type of BMP Wet detention pond Peak discharge from the BMP during the design storm 0.66 cfs Peak discharge from the BMP during the 10-year storm cfs Maximum capacity of a 100-foot long LS-VFS 10 cis Peak flow directed to the LS-VFS 2 cts Is a flow bypass system going to be used? n (Y or N) Explanation of any 'Other" responses above F—C,EIVF— DEC 31 2013 Fonn SW401 - LS-VFS - 29June2012 - Rev.10 page 1 of 3 LS-VFS Design Forebay, surface area Depth of forebay at stormwater entry point Depth of forebay at stormwater exit point Feet of level lip needed per cis Computed minimum length of the level lip needed Length of level lip provided Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS Slope (Rom level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector swale at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered Row splitting device? Dimensions of the channel (see diagram below): M S W y (Row depth for 10-year storm) Reeboard (during the 10-year storm) Peak velocity in the channel during the 10-yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any "Other* responses above sq ft in in 10 ft/cfs 20 ft 20 ft 40 ft ,10.25 fmsl 9.00 bnsl 3.13 % n (Y or N) n (Y or N) n (Y or N) n (Y or N) R R ft ft ft ft/sec (Y or N) (Y or N) M Form SW401 - LS-VFS - 29.Mre2012 - Rev.10 page 2 of 3 =� JiIII. REQUIRED ITEMS CHECKLIST EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Requried Item: 1. Plans (1' - 59 or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Forebay (if applicable), - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), and - Boundades of drainage easement. 2. Plan details (1' = 30' or larger) for the level spreader showing: - Forebay (if applicable), - High flow bypass system, - One foot topo lines between the level lip and lop of stream bank, - Proposed drainage easement, and - Design at ultimate build -out. 3. Section view of the level spreader (1' = 29 or larger) showing: - Underdrain system (if applicable), -Level lip, - Upslope channel, and - Downslope filler fabric. 4. Plan details of the flow splitting device and supporting calculations (if applicable). 5. A construction sequence that shows how the level spreader will be protected from sediment unfit the entire drainage area is stabilized. 6. If a non -engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present. 7. The supporting calculations. B. A copy of the signed and notarized operation and maintenance (08M) agreement. CH Page or plan sheet number and any notes: C-302. C-702 Previously submitted HydroCAD Calculations. EGEIVE DEC 3 12013 Fonn SW401 - LS-VFS - 29June2012 - Rev.10 page 3 of 3 State Stormwater Management Systems Permit No. SW8 131209. Regional Comm. Station and CH53K Maintenance Bldg MCAS NR Stormwater Permit No. SW8 131209 Onslow, Court Designer's Certification I �(.6//�iFG , as a duly registered. in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for �%�1 f �� ��cliLl (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specifications: G�- Registration Number d Date SEAL ,�•Q�N CA 0�, .f CAI ' 032745 �;l'GINE�P' •�� ` r g MAY 1 W it Paae 7 of 8 araie atummu ei managemem aystems Permit No. SW6131209, -Certi/fication:Requ ireme'nts:, y 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. �4. All roof drains are located such that the runoff is directed into the system. y5. The outlet structure elevations are per the approved plan. The outlet structure is located per the approved plans. t�7. Trash rack is provided on the outlet structure. 1---8. All slopes are grassed with permanent vegetation. Vegetated slopes are no steeper than 3:1. �10. The inlets are located per the approved plans and do not cause short-circuiting of the system. 1� 1. The permitted amounts of surface area and/or volume have been provided. > 1 Required drawdown devices are correctly sized and located per the approved plans. y 3. All required design depths are provided. ✓14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. The required system dimensions are provided per the approved plans. 6 All components of the stormwater BMP are located in either recorded common areas, or recorded easements. cc: NCDENR-DEMLR Wilmington Regional Office Page 8 of 8 c�ARG� DESIGN SOLUTIONS. May 9, 2018 Ms. Linda Lewis North Carolina Department of Environment and Natural Resources Division of Energy, Mineral, and Land Resources Land Quality Section —Wilmington Regional Office 127 Cardinal Drive Extension Wilmington, North Carolina 28405 RE: State Stormwater Management Permit No SW8 131209 Regional Comm. Station and CH53K Maintenance Building MICAS NR Dear Ms. Lewis: Attached herewith is the executed Designer's Certification and check list for the subject project. If you require any further information on this project, please contact me directly to discuss it. Respectfully Submitted, Barge Design Solutions, Inc. aivil s J. u en Jr., P. . Group eader c: Arthur Bianchini, P.E. Enclosures Non -Transfer Application Completeness Review Checklist Project Name: aI Project County/Location: or-'s,5tAL� /MCAS p4 Permit Action: New New Permit #': Not located in the ETJ of the following delegated Delivered to WIRO: Received/Accepted Date: Given to Admin: Acknowledged Date': and functioning programs: NHC: Carolina Beach / Kure Beach / Wilmington / Wrightsville Beach Bruns: Leland / Navassa (?) / Oak Island Cart: Emerald Isle Onsl: Jacksonville Major Mod / Minor Mod Renewal Applicant & Permittee are the same?3 LD / LD Overall / HD &LD Combo Permit Type: Z�D Pend: Surf City General Permit / Offsite / Exempt + Redevelopment Development Type: Commercial/ Subdivided?: Subdivision Existing Permit #: Expiration Date': 7/ Zo Zo ZZ S IC o 2 15? 1 a 2- 5(�a 13 (7-6 7 14 8 ZDZL E�Offsite to SWB: Ells Offsite Lot approved in Master Permit? Rule(s): U2017 Coastal [,N2008 Coastal u1995 Coastal Phase II Universal El1988 Coastal Permittee Type & Documents Needed: Property Owner(s) =Purchaser =Lessee IDVi =Developer Viable? =Viable? =Viable? =Viable? =Viable? =Deed =Purchase Agmt =Lease =Election Minutes Paperwork Application 1>+": F—Is505 (within 6mo) Check#(s): W I Qfa D ENo Fee F] Supplement' (1 new form or for alder forms: 1 original per SCM) F-1O&M 2 Soils Report (Infil or PP) Calculations (signed/sealed) Deed Restrictions, if subdivided' Project Narrative QUSGS Map (or on file?) Subject to SA?: Y / N Subject to ORW?: Y / N Plans (2 Sets) NOTES: 'Enter RIMS Acknowledged Date on this Sheet 'For New Projects -Enter New Permit # on Supplements & Deed Restriction Templates. 3If permittee is different, STOP. Needs to be transferred first. °If w/in 6 months and they are requesting a mod, STOP. Needs a renewal first. slf Lot not approved in master permit, STOP. Master permit needs mod. EMAILED ENGINEER DATE: REVIEWER NAME: Comments: G:WQ\\\Reference Library\Procedures\Checklists\Completeness Review Checklist_2021 09 08 Burd, Tina J From: Burd, Tina J Sent: Thursday, August 18, 2022 1:56 PM To: Barraco CIV Talia M Subject: SW8 131209 - Regional Comm. Station and CH53K Maint Bldg. MCAS NR The Wilmington Regional Office of the Division of Energy, Mineral and Land Resources (Stormwater Section) accepted the Stormwater Permit Renewal Application and $505.00 fee for the subject project on August 10, 2022. The project has been assigned to Ashley Smith and you will be notified if additional information is needed. Best Regards, Tina Burd Administrative Associate II Wilmington Regional Office Division of Environmental Assistance & Customer Service Phone 910-796-7215 NCDEQ Wilmington Regional Office 127 Cardinal Drive Ext. Wilmington, NC 28405 �� Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. Website: http //deg nc gov/about/divisions/energy-mineral-land-resourceszstormwater Based on the au rcut guidance to mini mi=e the spread of COVI D-rq, the Department of Envh-onrueutal Quality has adjusted operations to protect the health and safety of the stuff and public. Many employees are wm-hing remotely or arc on staggered shifts. To accommodate. these staffing changes, all DEQoffice locations are limiting public access to appointments only. Please check with the appropriate staff before visiting at, -of offices, as we may be able to handle ymrc i equests by phone or email. We appreciate your patience as we continue to serve the public during this challenging time.