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HomeMy WebLinkAbout040036_02 Site Eval and Dam Safety_20230607APPENDIX 8,3 USDA United States Natural NC-CPA-17 Department of Resources Rev. Dec. 2000 Agriculture Conservation Page 1 of 2 Service WASTE MANAGEMENT FACILITY SITE EVALUATION GENERAL INFORMATION rxelzy 13 Name 1 Location l� Address i47LI ® r t _ ) Telephone 70 Y!2i/ Size of Operation (animal units) Q� LOCATION DATA DISTANCE FROM NEAREST RESIDENCE NOT OWNED BY PRODUCER %FT DISTANCE FROM NEAREST PUBLIC FACILITY (school, church, etc...) IS SITE WITHIN 100-YEAR FLOODPLAIN? YES_ NO� If yes, NRCS cannot provide assistance. "BLUE IS SITE AT LEAST 100 FT. FROM A LINE" PERENNIAL STREAM? YES Y NO_ If no, site must be relocated. DOES SITE MEET MINIMUM STATE SETBACK REQUIREMENTS FROM A YES VINO WELL SUPPLYING WATER FOR HUMAN CONSUMPTION? If no, NRCS cannot provide assistance. IS SITE WITHIN I -MILE ZONING JURISDICTION OF A MUNICIPALITY? YES_ NO V If yes, landowner should consult with a local zoning board about required permits. Permits must be obtained prior to design approval. A/ ARE UTILITY LINES LOCATED IN THE CONSTRUCTION AREA? YES_ NO If yes, see Part 503 of the National Engineering Manual for policy. (Copies of maps or other reference material may be attached to site evaluation.) WETLANDS WILL PROJECT INVOLVE CLEARING VEGETATION, IMPROVING DRAINAGE, OR FILLING LOW GROUND? If yes, producer should have a "Certified Wetland Determination" on file for the work site. YES_ NO Producers shall complete forms CPA-038 and AD-1026 to obtain Certified Wetland Determinations. WILL THE PROJECT INVOLVE DIRECT OR INDIRECT MANIPULATION OF WETLAND SOILS, PLANTS, OR HYDROLOGY? YES N _ IF WETLANDS WILL BE MANIPULATED, HAS THE PRODUCER BEEN ADVISED THAT THEY MUST NOT WORK IN WETLANDS UNTIL THEY HAVE RECEIVED INFORMATION FROM THE U.S. ARMY CORPS OF ENGINEERS AND THE NC DIVISION OF WATER QUALITY CONCERNING PERMIT REQUIREMENTS? YES NO_ NRCS WILL PROVIDE TECHNICAL ASSISTANCE FOR PROJECTS IMPACTING WETLANDS ONLY UNDER THE FOLLOWING CIRCUMSTANCES: a.) NRCS has determined that a suitable non -wetland site is not available YES— NO b.) The most practical site for the project involves wetlands. NRCS has determined this site to be most practical considering the change of wetland functions, the suitability of the resource for this project, the costs, and best available technology. The producer, according to a mitigation plan provided or approved by NRCS, shall mitigate unavoidable impacts to wetlands. YES NO ODOR CONTROL HAS ODOR CONTROL BEEN DISCUSSED WITH PRODUCER: ■ PREDOMINANT WIND DIRECTION? �YES NO • PRE -CHARGING LAGOON WITH FRESH WATER TO AT LEAST %2 OF THE CAPACITY?I �'I /' AYES NO ■ USING GOOD SOUND JUDGEMENT IN LAND APPLICATION OF WASTE? YES V/NO APPENDIX 8.3 NC-CPA-17 Rev. Dec. 2000 Page 2 of 2 OTHER ENVIRONMENTAL FACTORS If the answer to any of the following is YES, NRCS may provide technical assistance according to its General Manual policies. Contact the resource specialist for assistance, if needed. USING THE FOTG LIST OF ENDANGERED & THREATENED SPECIES AS A GUIDE, IS IT OBVIOUS THAT THE SITE PROVIDES HABITAT FOR A LISTED SPECIES? YES NO-V IS A DESIGNATED NATURAL SCENIC AREA INCLUDED IN THE PLANNING AREA, OR YES NO� WILL PLANNED ACTIONS IMPACT ON AN ADJACENT NATURAL, SCENIC AREA? HAS A CULTURAL RESOURCt�,9.EVIEW BE PE ORMED FOR TA, PRIOR TO STARTING ANY GROUND T DISTURBING ACTIVITIES? 10 I W & � OtPC {.►f11 YES NO ARE THERE PRIME, UNIQUE, STATE OR LOCALLY IMPORTANT YES NO--V/- FARMLANDS IN THE OPERATING UNIT? WILL THE ACTION RESULT IN SODBUSTING? YES NO A/ WASTE MANAGEMENT DOES PRODUCER OWN ENOUGH LAND TO PROPERLY APPLY ALL WASTE INCLUDING YES VNO. SLUDGE, EVEN THOUGH SLUDGE MAY BE ONLY APPLIED INFREQUENTLY? I H IF NO, DOES PRODUCER AVE ACCESS TO MORE LAND? YES 0 NO_ IF LAND IS NOT OWNED BY PRODUCER, CAN PRODUCER GET AN AGRE N,T F 9QLi , YES �NO_ LAND ON WHICH WASTE WILL BE APPLIED? w u (Attach Waste Utilization Plan to site evaluation.) I a e 1 SOIL INVESTIGATION (VALID ONLY IF SOIL INVESTIGATION SHEET ATTACHED) IS SOIL SUITABLE FOR LAGOON? WCVS `(�'5-fDy'4n 4P— POOA YES 1( NO IS A LINER REQUIRED? YES ty NO TYPE OF LINER TO BE USED: CLAY BENTONITE SYNTHETIC IF CLAY LINER IS TO BE USED, IS SUITABLE CLAY AVAILABLE ON SITE? YES__\o/NO IF CLAY IS NOT AVAILABLE ON SITE, DOES LANDOWNER HAVE ACCESS TO CLAY? YES O IS A CORE TRENCH REQUIRED? (Attach soil investigation sheet to site evaluation.) YES NO IS SUBSURFACE DRAIN TILE PRESENT? (If yes, tile must be removed or plugged.) YES NO V SITE APPROVED �(_ � � tt iYES� jNO L _ (CONDITIONAL A/ COMMENTS r ^t fl / "e— This site investigation is valid for twelve months from the date shown below. If construction has not been started within twelve months, ew site investigation will be requ. d. /I Signature Date U " Changes in the local or state law or changes in the standard could require a new site investigation. USDA United States Department of Agriculture Natural Resources Conservation Service WASTE MANAGEMENT FACILITY SITE EVALUATION APPENDIX 8.3 NC-CPA-17 Rev. Dec. 2000 Page 1 of 2 GENERAL INFORMATION Name � W �l" C, liYm ^9�7'C Location Cam' / Address f & �� '_ ��tJ�✓C Telephone %i 57 Size of Operation (animal units) LOCATION DATA DISTANCE FROM NEAREST RESIDENCE NOT OWNED BY PRODUCER _IV-040 T DISTANCE FROM NEAREST PUBLIC FACILITY (school, church, etc...) >1C 0 O0 FT IS SITE WITHIN 100-YEAR FLOODPLAIN? YES_ NOAZ�' If yes, NRCS cannot provide assistance. , /� IS SITE AT LEAST 100 FT. FROM A `BLUE LINE" PERENNIAL STREAM? YES V NO� If no, site must be relocated. DOES SITE MEET MINIMUM STATE SETBACK REQUIREMENTS FROM A / YES / NO_ WELL SUPPLYING WATER FOR HUMAN CONSUMPTION? V— If no, NRCS cannot provide assistance. IS SITE WITHIN 1-MILE ZONING JURISDICTION OF A MUNICIPALITY? YES_ NO If yes, landowner should consult with a local zoning board about required permits. Permits must be obtained prior to design approval. ARE UTILITY LINES LOCATED IN THE CONSTRUCTION AREA? YES_ NO_�/ If yes, see Part 503 of the National Engineering Manual for policy. (Copies of maps or other reference material may be attached to site evaluation.) WETLANDS WILL PROJECT INVOLVE CLEARING VEGETATION, IMPROVING DRAINAGE, OR FILLING LOW GROUND? / If yes, producer should have a "Certified Wetland Determination" on file for the work site. YES_ NO V Producers shall complete forms CPA-038 and AD-1026 to obtain Certified Wetland Determinations. WILL THE PROJECT INVOLVE DIRECT OR INDIRECT MANIPULATION OF WETLAND SOILS, PLANTS, OR HYDROLOGY? YES NO_ IF WETLANDS WILL BE MANIPULATED, HAS THE PRODUCER BEEN ADVISED THAT THEY MUST NOT WORK IN WETLANDS UNTIL THEY HAVE RECEIVED INFORMATION FROM THE U.S. ARMY CORPS OF ENGINEERS AND THE NC DIVISION OF WATER QUALITY CONCERNING PERMIT REQUIREMENTS? YES NO NRCS WILL PROVIDE TECHNICAL ASSISTANCE FOR PROJECTS IMPACTING WETLANDS ONLY UNDER THE FOLLOWING CIRCUMSTANCES: a.) NRCS has determined that a suitable non -wetland site is not available YES_ NOT b.) The most practical site for the project involves wetlands. NRCS has determined this site to be most practical considering the change of wetland functions, the suitability of the resource for this project, the costs, and best available technology. The producer, according to a mitigation plan provided or approved by NRCS, shall mitigate unavoidable impacts to wetlands. YES NO ODOR CONTROL HAS ODOR CONTROL BEEN DISCUSSED WITH PRODUCER: ■ PREDOMINANT WIND DIRECTION? YES NO ■ PRE -CHARGING LAGOON WITH FRESH WATER TO AT LEAST % OF THE CAPACITY? V // j��YEVNO() USING GOOD SOUND JUDGEMENT IN LAND APPLICATION OF WASTE? YES APPENDIX 8.3 NC-CPA-17 Rev. Dec. 2000 Page 2 of 2 OTHER ENVIRONMENTAL FACTORS If the answer to any of the following is YES, NRCS may provide technical assistance according to its General Manual policies. Contact the resource specialist for assistance, if needed. USING THE FOTG LIST OF ENDANGERED & THREATENED SPECIES AS A GUIDE, IS IT OBVIOUS THAT THE SITE PROVIDES HABITAT FOR A LISTED SPECIES? YES NO IS A DESIGNATED NATURAL SCENIC AREA INCLUDED IN THE PLANNING AREA, OR YES NO / WILL PLANNED ACTIONS IMPACT ON AN ADJACENT NATURAL SCENIC AREA? HAS A CULTURAL RESOURC �5 APE ARMED FOR VIEW BED AREA, PRIOR TO STARTING ANY GROUND DISTURBING ACTIVITIES? F'YC>, � 6� YES NO ARE THERE PRIME, UNIQUE, STATE OR LOCALLY IMPORTANT YES NO__t,/ FARMLANDS IN THE OPERATING UNIT? WILL THE ACTION RESULT IN SODBUSTING? YES NO� WASTE MANAGEMENT ' / DOES PRODUCER OWN ENOUGH LAND TO PROPERLY APPLY ALL WASTE INCLUDING YES NO SLUDGE, EVEN THOUGH SLUDGE MAY BE ONLY APPLIED INFREQUENTLY? IF NO, DOES PRODUCER HAVE ACCESS TO MORE LAND? YES / NO IF LAND IS NOT OWNED BY PRODUCER, CAN PRODUCER GET AN AGREEMENT FOR YES r/ NO ( AND ON WHICH WASTE WILL BE APPLIED? <' > r Attach Waste Utilization Plan to site evaluation.) e —4(�✓ Wu SOIL INVESTIGATION (VALID ONLY IF SOIL /INVESTIGATIONSHEET ATTACHED) IS SOIL SUITABLE FORI,�4fl86id? VJG-.STC r-�,P9V%A YES ✓if�NO IS A LINER REQUIRED? YES NO TYPE OF LINER TO BE USED: CLAY ` V/ `J BENTONITE SYNTHETIC IF CLAY LINER IS TO BE USED, IS SUITABLE CLAY AVAILABLE ON SITE? YES_NO IF CLAY IS NOT AVAILABLE ON SITE, DOES LANDOWNER HAVE ACCESS TO CLAY? YES -NO �s IS A CORE TRENCH REQUIRED? (Attach soilnxve�stj�a 'on sheetto Vie_ valu is � o IS SUBSURFACE DRAIN TILE PRESENT? (If yes, tile must be removed or plugged.) YES NO L� SITE APPROVED YES NO CONDITIONAL k/ COMMENTS This site investigation is v 'd for twelve months from the date shown below. If construction has not been started within twelve months, a e site investigation will be required. /1 r f Signature Date v 1 Changes in the local or state law or changes in the standard could require a new site investigation. White Rock Farms, LLC Hazard Classification Commentary for Waste Storage Ponds #2 and #3 May 2023 By: Samuel Bingham, PE See information attached for waste pond #2 and waste pond #3. Breach inundation maps were not prepared for the dams but based on valley and road characteristics, the dams are obviously low hazard. Inundation breach areas would be confined to the floodplain below the dams. Waste Pond #2 Planned water depth to top of dam —12.2 feet Storage at emergency spillway elevation —11.2 feet Maximum planned water storage depth below the 25-year emergency storage depth —10 feet Storage Volume at Top of Dam Elevation — 9.6 ac-ft Maximum Height from top of dam to back toe of dam — 473.0-442.0 = 31 feet Estimated Breach Qmax = 1,700 cfs State Road 1220 (Long Pine Church Road) is located 8,800 feet downstream of proposed waste pond #2. The floodplain width at state road is 800 feet wide. Using Lidar data, the low point of road is estimated to be 305.5 feet. Surface area upstream of road at 305.5 elevation — 15.09 acre Surface area at elevation 304.0 — 3.88 acre Surface area at elevation 302.0 — 0.08 acre Estimated storage upstream of road = 1.5' x —9.485 acres + 2' x —1.98 acres = 18.18 ac ft 2 culverts in Dead Fall Creek — each culvert is 5' diameter. 2 culverts in ditch on east side of bottomland — 3' diameter and 4' diameter The floodplain downstream of waste pond #2 is cropland and woodland prior to reaching the state road. See the drawing attached showing potential breach hazard flow path below the dam. Considering the width of valley downstream of dam and the slope of the flood plain, the maximum breach Q of 1700 cfs would flow at less than 1 foot of depth down the valley once a breach reaches the Deadfall Creek floodplain. Based on the attenuation of a potential breach down the valley, the valley storage above Long Pine Church Road being significantly greater than maximum pond storage at top of dam elevation and the size and number of culverts at the state road, the hazard classification for waste pond #2 is low (a). Waste Pond #3 Planned water depth to top of dam — 13.6 feet Storage at emergency spillway elevation —12.6 feet Maximum planned water storage depth below the 25-year emergency storage depth —12.0 feet Storage Volume at Top of Dam Elevation —14.7 ac-ft Maximum Height from top of dam to back toe of dam — 386.0-374.0 = 12 feet Estimated Breach Qmax = 1,300 cfs State Road (Rudolph Sikes Road) is located 11,900 feet downstream of proposed waste pond #3. The floodplain width upstream of state road is 300 feet plus wide. Soil survey map show 500 feet plus floodplain upstream of the state road. See the drawing attached showing potential breach hazard flow path below the dam. Rudolph Sikes Road crosses Clay Creek with a bridge. The bridge length is approximately 60 feet long and 12 feet above the creek. The state road is currently closed due to flood damage to the bridge according to signage at bridge. The road is very low use, and the dairy owner has doubts if the road will ever open again. The bridge appeared to be several feet above the floodplain elevation. The floodplain downstream of waste pond #3 is cropland and woodland prior to reaching the closed state road. Considering the width of valley downstream of dam and the slope of the flood plain, the maximum breach Q of 1300 cfs would flow at less than 1 foot of depth down the valley once a breach reaches the Clay Creek floodplain. Based on the attenuation of a potential breach down the valley, the valley storage above Rudolph Skies Road and the size of bridge over Clay Creek, the hazard classification for waste pond #3 is low (a). Waste Pond #2 to State Rd 1220 a 8,800 feet F z Long Fine --,`Waste Pond #2 to Deadfall Creek Cemeter, A. A. w 7,000 feet ❑ : Waste Pond # v Waste Pond #2 to Tribr: 830 feet . Waste Pond #1 Waste Pond- #3 to Clay Creek Sore th Carolina /74,300 feet — ERHELD C --_------ .,outh Carolina - _---_ _ '----------�_ Waste Pond #2J .., — - ANSON 0 CHESTERFIELDS' ' Hornsboro/Mount Croghan Quadrangles Topo Map 7.5 Minute, 2023 Waste Pond #3 to Rudolph Sikes Road 11,900 feet '., HornSboxa. Antioch _ Cemetery o, F2 009 1500 0 1500 g000 4500 � o — _ f A Scale 1' = 1500' o `e White Rack Farms, LLc MANAGEMENT SYSTEM 74 .opis Rod. P—hi-d, North C-1110 V,uhite Rock Farms, LLC PotenItal Breach Hazard Flow Paths - Anson County,..North Ccrokn0 RVASION PRPIECT A: CRAM BY 5CB SCALE: pAE 5f2023WAS'E _°QSN _CA 4 SHEET NO. 1 OF 1- FILENAME: F,re 1 5 C 10. Size of Waste Storage Pond #2 173.2'x283.2' 1.0 Freeboard 167.2' X 277.2' 3:1 1.2 Feet 25-year storage 3:1 160' x270' 10.0' normal storage 100'x210' Normal storage volume below 25-year storage Volume = 10.0/6[100x210 + 1601x270'+ 4(130x240)] = 315,000 .cu ft = 2,356,000 gallons Volume @ ESW Level - Volume = 11.2/6[100x210 + 167.2x277.2 + 4(133.6x243.6)] = 368,718 cu ft Top of Dam Volume - Volume = 12.2/6[100x210 + 173.2x283.2 + 4(136.6x246.6)] 416,411 cu ft = 9.6 ac-ft 11. Size of Waste Storage Pond #3 256. 6' x2 5 6. 6' 1.0 Freeboard 7 — 250.6' X 250.6' 0.6 Feet 25-year storage 247'x247' 3:1 12.0' normal storage 3:1 175'xl75' Normal storage volume below 25-year storage Volume = 12.0/6[175x175 + 247x247 + 4(21lx2ll)] = 539,436 cu ft = 4,035,000 gallons Volume @ ESW Level - Volume = 12.6/6[175x175 + 250.6x250.6 + 4(212.8x212.8)] = 576,578 cu ft Top of Dam Volume - Volume = 13.6/6[175xl75 + 256.6x256.6 + 4(215.8x215.8)] = 640,893 cu ft = 14.7 ac-ft White Rock Farms, LLC 15 Waste Plan 2023 Energy, Mineral and Land Resources ENVIRONMENTAL QUALITY Jurisdictional Determination/Hazard Classification Request To evaluate if a dam is governed by the Dam Safety Law of 1967 (as amended) If it is your desire to have the Land Quality Section's Darn Safety Program staff determine if your dam is governed by the Dam Safety Law of 1967 (as amended) (General Statute §143-215.23-37), Please complete this form in its entirety, if applicable, and return to: State Dam Safety Engineer North Carolina Department of Environmental Quality Division of Energy, Mineral, and Land Resources Land Quality Section 1612 Mail Service Center Raleigh, NC 27699-1612 1. Describe any potential hazards for loss of life and environmental or structural property damage to existing and/or potential future downstream developments (i.e. buildings, houses, roads, bridges, major utility lines, etc.): State road located 8,800 feet downstream 2. Please attach a vicinity map of the dam (Preferably aerial and/or topographic contour map, which shows the premise as well as the concerned downstream areas) and provide a brief description of the location/nearest physical street address: See potential breach hazard flow paths drawing and the Hazard Classification Commentary for waste storage ponds #2 and #3 attached. Dsgovern.frm (revised 2/14/17) Page 2 of 3 3. General Summary of the Dam: a. Name of Owner: White Rock Farms, LLC_(Waste Pond #2) b. Address: 1474 Jopennie Road c. City: Peachland State: NC Zip: 28133 d. Phone No.: 704-221-1705 _ Email: whiterockfarmjsllc@gmail.com_ Dam Name (STATE- ID, if assigned): Latitude: Longitude: 034°48'55.42" N 080014'47.59" W Nearest State Road Number/Name: (SR #) SR1223 Jopennie Road County: Anson River/Stream: Trib of Deadfall Creek Drainage Area (acres): 0 acres Dam Height (from the highest point on the top of dam to the lowest point on the downstream toe of dam in feet): 473-442 = 31' Depth of Water at Normal Pool (ft): 10, Depth of Water at Top of Dam (ft): 12.2' Impoundment Surface Area at Normal Pool (acres): 1.0 acre Impoundment Surface Area at Top of Dam (acres): 1.1 acre Storage Capacity at Normal Pool (acre-feet): 7.2 Maximum Storage Capacity at Top of Dam (acre-feet): 9.6 e. Please provide any additional engineering documents (historical records, design drawing plans, rating curves, etc.) 4. General Summary of the Downstream Area(s) [check all boxes that apply]: a. Primary Downstream Land Use: FX1 WOODLAND E AGRICULTURAL ❑ RESIDENTIAL ❑ INDUSTRIAL/COMMERCIAL b. Existing and/or Future Downstream Developments/Improvements: ❑ DWELLINGS 1-1 BUILDINGS FYI ROADS ❑ UTILITIES Page 3 of 3 Existing and/or Future Downstream Development/Improvement(s) Data: Downstream Hazard/Improvement Type Distance Downstream from Dam Floodplain Width Elevation Relative to Floodplain Channel Slope Breach Flood Wave Elevation Culvert/Bridge Dimensions Traffic Count Sight Distance Trib 1,830 ft 150 ft 5% —2 ft Deadfall Creek 7,000 ft 300' ft 0.8% <2' SR 1220 2.5' 2 - 5' pipes Long Pine 8,800 800 ft above 0.5% <1' 1 — 3' pipe 150 750' Church Road floodplain 1 — 4' pipe In accordance with 15A NCAC 02K .0105, I am providing the following proposed hazard classification: RECOMMENDED HAZARD CLASSIFICATION: 1-9 LOW ❑ INTERMEDIATE 1-1 HIGH I agree that this form will be used to initiate the Jurisdictional Determination process and/or determine its Hazard Classification based on current submittal and additionally requested documents, as needed. NAME OF OWNER/REPRESENTATIVE or PROFESSIONAL ENGINEER: _Samuel C. Bingham, PE r SIGNATURE: DATE: d COPY OF TR-66 BREACH HYDROGRAPH - Hazard Study of Dams Date Prepared By Watershed Name: Site No. Elevations Top of Dam Breach Hydrograph Wave Berm Average Valley Floor Stability Berm Length of Dam at Breach Elev Volume of Breach Top Width Upstream Slope Above Berm Upstream Slope Below Berm Downstream Slope Above Berm Downstream Slope Below Berm Wave Berm Width Stability Berm Width 1-May-23 SCB Waste Pond #2 473 Ft msl 473 Ft msl 0 Ft msl 460.8 Ft msl 0 Ft msl 581 Ft 9.6 Ac Ft 15 Ft 3 :1 3 :1 3 3 .1 0 Ft 0 Ft DA(ac)= Remaining storm runoff(inches)= Remaining storm runoff (acft)= TopOfbam Storage in AcFt= Breach Volume = Max Discharge at TOD (cfs) _ 0 0 0 9.6 9.6 0 Prepared by USDA-NRCS 5/28/2023 Page 1 COPY OF TR-66 BREACH HYDROGRAPH - Hazard Study of Dams Watershed Name: Waste Pond #2 Date 1-May-23 Site No. Prepared B : SCB Elevations Top of Dam 473.0 Ft msl Top Width 15 Ft Breach Hydrograph 473.0 Ft msl Upstream Slope Above Berm 3 :1 Wave Berm 0.0 Ft msl Upstream Slope Below Berm 3 :1 Average Valley Floor 460.8 Ft msl Downstream Slope Above Berm 3 :1 Stability Berm 0.0 Ft msl Downstream Slope Below Berm 3 :1 Length of Dam at Breach Elev 581 Ft Wave Berm Width 0 Ft Volume of Breach 9.6 Ac Ft Stability Berm Width 0 Ft Breach Discharge Computations Volume of Breach (Vs) 10 Ac Ft Height Of Breach (Hw) 12 Ft Cross -Section Area at Breach (A) 630 FT T = 65(H0-3�/0.416 375 IfL>T Br = (Vs * Hw)/A 0 Qmax = 1,100 (Br)1.35 114 CFS IfL<T, Qmax = 0.416 (L)(Hw1 10,299 CFS Qmax NOT GREATER THAN Qmax = 65(HW1's) 6,648 CFS Qmax NOT LESS THAN Qmax = 3.2(1-Iw5/2) 1,664 CFS Breach Qmax for Hazard Classification = 1,700 CFS - Prepared by USDA-NRCS 5/28/2023 Page 1 COPY OF TR-66 BREACH HYDROGRAPH -Hazard Study of Dams Watershed Name: Waste Pond #2 Site No. Breach Hydrograph Reservoir Q Max Volume at Time of Failure (ac ft) Qi= 1700 Vi= 10 T t Qi ft3 ac.ft 0 0 0 0.017 0.000 1700 306000 7.02 0.1 1.463 393 376816.1073 8.65 02 2.927 91 87204.73822 2.00 0.3 4.390 21 20181.37288 0.46 0.4 5.854 5 4670A77999 0.11 0.5 7.317 1 1080.866246 0.02 0.6 8.781 0 250.1396734 0.01 0.7 10.244 0 57.88862078 0.00 0.8 11.708 0 13.39688491 0.00 0.9 13.171 0 3,100376599 0.00 1 14.635 0 0.717505235 0.00 1.1 16.098 0 0.166048783 0.00 1.2 17.562 0 0.038427871 0.00 1.3 19.025 0 0.008893177 0.00 1.4 20.489 0 0.002058105 0.00 1.5 21.952 0 0.000476297 0,00 1.6 23.416 0 0.000110227 0.00 1.7 24.879 0 2.55094E-05 0.00 1.8 26.343 0 5.90351E-06 0.00 1.9 27.806 0 1.36622E-06 0.00 2 29.270 0 3.16178E-07 0.00 2.1 30.733 0 7.31715E-08 0.00 2.2 32.197 0 1.69337E-08 0.00 2.3 33.660 0 3.91889E-09 0.00 2.4 35.124 0 9.0693E-10 0.00 2.5 36.587 0 2.09886E-10 0.00 2.6 38.051 0 4.8573E-11 0.00 2.7 39.514 0 1.1241E-11 0.00 2.8 40.978 0 2.60145E-12 0.00 2.9 42.441 0 6.02042E-13 0.00 3 43.905 0 1.39328E-13 0.00 3.1 45.368 0 3.22439E-14 0.00 3.2 46.832 0 7.46206E-15 0.00 3.3 48.295 0 1.72691E-15 0.00 3.4 49.759 0 3.9965E-16 0.00 3.5 51.222 0 9.24891E-17 0.00 18.28 3.6 52.686 0 2.14043E-17 0.00 3.7 54.149 0 4.9535E-18 0.00 3.8 55.613 0 1.14636E-18 0.00 3.9 57.076 0 2.65298E-19 0.00 4 58.540 0 6.13965E-20 0.00 4.1 60.003 0 1.42087E-20 0.00 4.2 61.467 0 3.28825E-21 0.00 4.3 62.930 0 7.60984E-22 0.00 4.4 64.394 0 1.76111 E-22 0.00 4.5 65.857 0 4.07565E-23 0.00 4.6 67.321 0 9.43208E-24 0.00 4.7 68.784 0 2.18282E-24 0.00 18.28 Qi 1,800 1,600 1,400 1,200 W 1,000 a-Qi U. U 800 600 400 200 0 0 0.5 1 1.5 2 2.5 Time (hours) Prepared by USDA-NRCS 5/28/2023 Page 1 Energy, Mineral and Land Resources ENVIRONMENTAL QUALITY Jurisdictional Determination/Hazard Classification Request To evaluate if a dam is governed by the Dam Safety Law of 1967 (as amended) If it is your desire to have the Land Quality Section's Dam Safety Program staff determine if your dam is governed by the Dam Safety Law of 1967 (as amended) (General Statute § 143-215.23-37), Please complete this form in its entirety, if applicable, and return to: State Dam Safety Engineer North Carolina Department of Environmental Quality Division of Energy, Mineral, and Land Resources Land Quality Section 1612 Mail Service Center Raleigh, NC 27699-1612 Describe any potential hazards for loss of life and environmental or structural property damage to existing and/or potential future downstream developments (i.e. buildings, houses, roads, bridges, major utility lines, etc.): Rudolph Sikes Road located 11,900 feet downstream of proposed dam. SR is currently closed and even when open was very low used. 2. Please attach a vicinity map of the dam (Preferably aerial and/or topographic contour map, which shows the premise as well as the concerned downstream areas) and provide a brief description of the location/nearest physical street address: See potential breach hazard flow paths drawing and the Hazard Classification Commentary for waste storage ponds #2 and #3 attached. _ Dsgovern.frm (revised 2/14/17) Page 2 of 3 3. General Summary of the Dam: a. Name of Owner: White Rock Farms, LLC_(Waste Pond #3) b. Address: 1474 Jopennie Road c. City: Peachland State: NC Zip: 28133 d. Phone No.: 704-221-1705 _ Email: whiterockfarmjsllc@gmail.com Dam Name (STATE- ID, if assigned): Latitude: Longitude: 034°49'4.95" N 080016' 1.97" W Nearest State Road Number/Name: (SR #) SR1224 Austin Road County: Anson River/Stream: Trib of Clay Creek Drainage Area (acres): 0 acres Dam Height (from the highest point on the top of dam to the lowest point on the downstream toe of dam in feet): 386-374 =12' Depth of Water at Normal Pool (ft): 12' Depth of Water at Top of Dam (ft): 13.6' Impoundment Surface Area at Normal Pool (acres): 1.4 acre Impoundment Surface Area at Top of Dam (acres): 1.5 acre Storage Capacity at Normal Pool (acre-feet): 12.4 Maximum Storage Capacity at Top of Dam (acre-feet): 14.7 e. Please provide any additional engineering documents (historical records, design drawing plans, rating curves, etc.) 4. General Summary of the Downstream Area(s) [check all boxes that apply]: a. Primary Downstream Land Use: F1WOODLAND I X1 AGRICULTURAL ❑ RESIDENTIAL ❑ INDUSTRIAL/COMMERCIAL b. Existing and/or Future Downstream Developments/Improvements: 1-1 DWELLINGS F-1 BUILDINGS I Y-1 ROADS ❑ UTILITIES Page 3 of 3 Existing and/or Future Downstream Development/Improvement(s) Data: Downstream Distance Elevation Breach Hazard/Improvement Type Downstream from Dam Floodplain Width Relative to Floodplain Channel Slope Flood Wave Elevation Culvert/Bridge Dimensions Traffic Count Sight Distance Clay Creek 4,300 ft 300 ft 2% h2 ft Bridge ridge Length — Low Rudolph Sikes 300'+ 12' 15000 11,900 ft <1% <1' 60' —12' Presently Road ft above ft above closed Creek creek In accordance with 15A NCAC 02K .0105, I am providing the following proposed hazard classification: RECOMMENDED HAZARD CLASSIFICATION: M LOW 1-1 INTERMEDIATE 1-1 HIGH I agree that this form will be used to initiate the Jurisdictional Determination process and/or determine its Hazard Classification based on current submittal and additionally requested documents, as needed. NAME OF OWNER/R%PRESENTATIVE or PROFESSIONAL ENGINEER: _Samuel C. Bingham, PE SIGNATURE: DATE: ///Ae- 3, P.E. SEAL: COPY OF TR-66 BREACH HYDROGRAPH - Hazard Study of Dams Date Prepared By Watershed Name: Site No. Elevations Top of Dam Breach Hydrograph Wave Berm Average Valley Floor Stability Berm Length of Dam at Breach Elev Volume of Breach Top Width Upstream Slope Above Berm Upstream Slope Below Berm Downstream Slope Above Berm Downstream Slope Below Berm Wave Berm Width Stability Berm Width 1-May-23 SCB Waste Pond #3 386 Ft msl 386 Ft msl 0 Ft msl 375 Ft msl 0 Ft msl 800 Ft 14.7 Ac Ft 15 Ft 3 :1 3 :1 3 3 :1 0 Ft 0 Ft DA(ac)= 0 Remaining storm runoff(inches)= 0 Remaining storm runoff(acft)= 0 TopOf Dam Storage in AcFt= 14.7 Breach Volume = 14.7 Max Discharge at TOD (cfs) = 0 Prepared by USDA-NRCS 5/28/2023 Page 1 COPY OF TR-66 BREACH HYDROGRAPH - Hazard Study of Dams Watershed Name: Waste Pond #3 Date 1-May-23 Site No. Prepared By: SCB Elevations Top of Dam 386.0 Ft msl Top Width 15 Ft Breach Hydrograph 386.0 Ft msl Upstream Slope Above Berm 3 :1 Wave Berm 0.0 Ft msl Upstream Slope Below Berm 3 :1 Average Valley Floor 375.0 Ft msl Downstream Slope Above Berm 3 :1 Stability Berm 0.0 Ft msl Downstream Slope Below Berm 3 :1 Length of Dam at Breach Elev 800 Ft Wave Berm Width 0 Ft Volume of Breach 14.7 Ac Ft Stability Berm Width 0 Ft Breach Discharge Computations Volume of Breach (Vs) 15 Ac Ft Height Of Breach (Hw) 11 Ft Cross -Section Area at Breach (A) 528 FT2 T = 65(H°-3s)/0.416 362 IfL>T, Br = (Vs * Hw)/A 0 Qmax = 1,100 (Br)1" 223 CFS IfL<T, Qmax = 0.416 (L)(Hwt 12,142 CFS Qmax NOT GREATER THAN Qmax = 65(HW"') 5,489 CFS Qmax NOT LESS THAN Qmax = 3.2(Hw5/) 1,284 CFS Breach Qmax for Hazard Classification = 1,300 CFS Prepared by USDA-NRCS 5/28/2023 Page 1 COPY OF TR-66 BREACH HYDROGRAPH -Hazard Study of Dams Watershed Name: Waste Pond #3 Site No. Breach Hydrograph Reservoir Q Max Volume at Time of Failure (ac ft) Qi= 1300 Vi= 15 T t Qi ft3 ac. ft 0 0 0 0.017 0.000 1300 234000 5.37 0.1 0.731 626 346668.5423 7.96 0.2 1.462 301 166917.2621 3.83 0.3 2.193 145 80368.90861 1.85 0.4 2.923 70 38696.78539 0.89 0.5 3.654 34 18632,09574 0.43 0.6 4.385 16 8971.158409 0.21 0.7 5,116 8 4319.518551 0.10 0.8 5.847 4 2079.802815 0.05 0.9 6.578 2 1001.403212 0.02 1 7.309 1 482,1651288 0.01 1.1 8.040 0 232.1574454 0.01 1.2 8.770 0 111.7813717 0.00 1.3 9,501 0 53.82155643 0.00 1.4 10.232 0 25.91451414 0.00 1.5 10.963 0 12.47756638 0.00 1.6 11.694 0 6.007817164 0.00 1.7 12.425 0 2.892700865 0.00 1.8 13.156 0 1.392805085 0.00 1.9 13.887 0 0.67062102 0.00 2 14.617 0 0.322896978 0.00 2.1 15.348 0 0.155471503 0.00 - 2.2 16.079 0 0.074857896 0.00 2.3 16.810 0 0.036043291 0.00 2.4 17.541 0 0.017354466 0.00 2.5 18.272 0 0.008355993 0.00 2.6 19.003 0 0.004023323 0.00 2.7 19.734 0 0.001937188 0.00 2.8 20.464 0 0.000932736 0.00 2.9 21.195 0 0.000449102 0.00 3 21.926 0 0.000216238 0.00 3.1 22.657 0 0.000104116 0.00 3.2 23.388 0 5.01309E-05 0.00 3.3 24.119 0 2.41375E-05 0.00 3.4 24.850 0 1.1622E-05 0.00 3.5 25.580 0 5.59585E-06 0.00 20.72 3.6 26.311 0 2.69434E-06 0.00 3.7 27.042 0 1.2973E-06 0.00 3.8 27.773 0 6.24636E-07 0.00 3.9 28.504 0 3.00755E-07 0.00 4 29.235 0 1.44811 E-07 0.00 4.1 29.966 0 6.97248E-08 0.00 4.2 30.697 0 3.35718E-08 0.00 4.3 31.427 0 1.61644E-08 0.00 4.4 32.158 0 7.78301E-09 0.00 4.5 32.889 0 3.74744E-09 0.00 4.6 33.620 0 1.80435E-09 0.00 4.7 34.351 0 8.68777E-10 0,00 20.72 Qi 1,400 1,200 1,000 800 f-Qi LL U 600 400 200 -- 0 0 0.5 1 1.5 2 2.5 Time (hours) Prepared by USDA-NRCS 5/28/2023 Page 1