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HomeMy WebLinkAboutWQ0045116_Pressure sewer design_20240202SEPT 99, 2922 D/Ari 1 v C 7 PRESSURE SEWER POWERED BY RPjOR FAIRWAY ACRES DESIGN ANALYSIS BRUNSWICK COUNTY, NC PREPARED FOR: Ashley Kabat, Timmons Group PREPARED BY: Brock Shepard, Crane Pumps and Systems BARNES cRaNE PUMPS &SYSTEMS > CEIVED ;; 0 2 2024 NCDEGIDAMES Summer Crane Pumps & Systems is pleased to provide the following preliminary design analysis which examines the use of a low-pressure sewer system utilizing the Barnes Razor Grinder Pump for the Fairway Acres project in Brunswick County, NC. The process includes a mass flow calculation and system performance evaluation based on using pressure sewer force mains. The low pressure sewer approach provides not only a technical solution, but also an economic advantage to be realized with low up front and 0&M Costs. The hydraulic analysis incorporates force main and pumping system details (including tributary grinder pump station inputs), head loss calculations based on respective force main size, length and system elevations, and pump performance curves for each pump station. Analysis Description Using the maps and project data provided by Timmons Group, we ran the enclosed preliminary pressure sewer piping analysis. This was analyzed by utilizing the Rational Method model as recommended by the EPA Manual 625/1-91/024 in conjunction with the KY Pipe hydraulic modeling software. In this way we are able to model using both theoretical data as well as actual conditions. Computations are based on the Hazen -Williams formula for friction loss, using calculations of cross -sectional area and flow rate to determine the capacity of the existing force main while checking to ensure scouring velocity of approximately 2.0 FPS or higher. A C factor of 140, PVC SDR 21pipe and an average daily flow per unit of 480 GPD are also used. The models were created using assumptions that only residential units would be connected to the system, and that it would be terminating into a manhole on the southern portion of the system. This pressure sewer system accounts for 50 simplex stations, and pipe routing was laid according to the sewer profile provided by Timmons Group. Valve Recommendations Good engineering practice suggests the installation of cleanouts / flushing connections with associated shutoff valves in pressure sewer systems. The flushing locations are essential for servicing sewer mains and can be used to isolate segments of a pressure sewer network for servicing. The connections serve as locations for high pressure sewerjetting or flushing activities. There are three primary applications for flushing connections in low pressure sewer systems; located at the end of each main, at pipe intersections, and in -line locations. Equipment capabilities for sewer jetting or cleaning equipment available to the municipality should also be considered. Cleanout locations are routinely installed in the same valve pit as automatic air release or vacuum release valves. Representative drawings are available upon request. Terminal Cleanout Locations: Located at the terminal end of each pipe segment. Inline Cleanout Locations: Located in 800 to 1,200 foot intervals. Interval location also dependent upon type of service equipment available to complete the flushing process. Junction Cleanout Locations: Located at intersections in pipe, at changes in direction in pipe and at changes in pipe diameter. We also recommend installation of a Crane Stainless Steel Curb Stop/Check Valve assembly in the discharge line between the grinder pump station and the force main. It is normally acceptable to have the Curb Stop/Check Valve assembly installed near other utility shut off valves for convenience of access, though they may be installed closer to the station. Rational Method Formula There are various equations, charts and formulas that exist when trying to determine design flow in a low pressure sewer system. In addition, local departments of environmental regulations may offer site specific guidelines when determining design flow. Crane utilizes the Rational Method Formula, which the EPA recognizes "has almost exclusively become the accepted method of practice." (EPA Manual 52511-911024) This method attempts to predict average flow produced by the system throughout the day, taking into account peak flow. This flow is directly related to the number of homes connected to the system. The flow is not dependent on the output from any pump being constant or the same as others, and it works with all makes and models of grinder pumps. It also reflects a snapshot of the system at a given moment — not a best case scenario. The baseline formula of the Rational Method is — Q = AN+B • Q = Predicted flow derived from input data • A = A coefficient that adjusts based on average daily flow o EPA National Average is 200 GPD/EDU o Divide GPD by 400 to determine A value —will typically be .5 • N = Number of Equivalent Domestic Units (EDU) or lots • B = Minimum flow one pump will produce at maximum static head with no friction loss Utilizing the Rational Method on this system provides the following flow - Scenario A = 1.2 (480 GPD/400) N = 50 (50 EDUs) B = 28 GPM (pump curve included below) Q = 88 GPM System Flow Pipe Charts Utilizing the above Rational Method formula on the individual segments of the system, we were able to size the pipe to reach desired scouring velocity of 2.0 FPS while not exceeding 5.0 FPS. The below charts illustrate this by highlighting the number of EDUs required to reach the target velocities given the defined system parameters. EDU = 480 TABLE 1 PVC SDR 21 (IPS) (200 PSI) A = 1.2 B= 28 NOMINAL NOMINAL PIPE Effective PIPE Volume SIZE Diameter GPM @ SIZE EDU's @ per 100 Ft. inches (Inches) 2 FPS inches 2 FPS Gallons 1.00 �1.1814 7 1.00 1 5.69 1.25 1.4925 11 1.25 1 9.09 1.50 1.7092 14 1.50 1 11.92 2.00 2.1354 22 2.00 1 18.60 2.50 2.5846 33 2.50 4 27.25 3.00 3.1460 48 3.00 17 40.38 4.00 4.0463 80 4.00 43 66.80 5.00 5.0012 122 5.00 79 102.04 6.00 5.9551 174 6.00 121 144.68 TABLE 1 PVC SDR 21 (IPS) (200 PSI) EDU = 480 A = 1. B= 28 NOMINAL NOMINAL PIPE Effective PIPE Volume SIZE Diameter GPM @ SIZE EDU's @ per 100 Ft. inches Inches 5 FPS inches 5 FPS _ (Gallons) 1.00 1.1814 17 1.00 1 5.69 1.25 1.4925 27 1.25 1 9.09 1.50 1.7092 36 1.50 6 11.92 2.00 2.1354 56 2.00 23 18.60 2.50 2.5846 82 2.50 45 27.25 3.00 3.1460 121 3.00 78 40.38 4.00 4.0463 200 4.00 144 66.80 5.00 5.0012 306 5.00 232 102.04 6.00 5.9551 434 6.00 338 144.68 Conclusion The design presented suggests that the system is optimally designed for the scenario detailed in this report. This system will also benefit from several advantages of low pressure sewer systems, including lower up -front costs, no inflow & infiltration, little environmental impacts and quicker project implementation time. Thank you for the opportunity to review this project. Please feel free to contact me if you have any questions or require additional information. Regards, Brock Shepard Pressure Sewer Specialist Crane Pumps & Systems 2022 Series ZOGP Performance Curve 2HP, 3450RPM, 60Hz, High -Flow Submersible Grinder Pumps BARNES" www.cranepumps.com nches (MM) Testing is performed with water, specific gravity 1.0 @ 68' F @ (20°C), other fluids may vary performance SECTION PAGE 22 LCRAN E DATE 8f20 A Crane Co. Company PUMPS & SYSTEMS USA: (937) 778-8947 • Canada: (905) 457-6223 • International: (937) 615-3598 1-1/2" SDR 21 PVC Pipe for Service Laterals 51000 1-1/4" Stainless Steel Curb Stop/Check Valve 50 2" SDR 21 PVC Pipe 790 3" SDR 21 PVC Pipe Simplex Grinder Pump Stations 1,777 W FAIRWAY ACRES BRUNSWICK COUNTY. NC HYDRAULIC MODEL [-'2 FAIRWAY ACRES - BRUNSWICK COUNTY, NC wj Pip. ICRAN� o <_, ® <=1.z5 PUMPS &SYSTEMS Cum2 PIPE SCHEMATPG <= <= 25 EPA FORMULA i Q-A Nib c= 3 , �.._ - x�;:��:w"13i��',w; �i`. A�LI � B•ZH • N=5U � Q"SB GPM `'s - GPU'+iBA GP❑ C FALTQR=1A0 : PIPE MA rL-sm.3S FAIRWAY ACRES - BRUNSWICK COUNTY, NC ump 4 mp-7 Pump-1 f-8 J-6 J-7 J J-2 JJ ump-2 r� J-8 J ump-6 y, _R-! Pump-6 .a= Pic. Diameter GRAN E O ` 1 PUMPS & SYSTEMS �I e= 1.5 � <= 2 Hf3OE NAMES L r= 25 EPA FORMULA 14-AN•B 3 — � t=a A•1.2 9-26 � N-59 O^88 GPM 14 GPA•i6D GPO C FACTOR-UD : PIPE MATL•SDR 21 ************************************************ S U M M A R Y O F O R I G I N A L D A T A ************************************************ U N I T S S P E C I F I E D FLOWRATE ............ = gallons/minute HEAD (HGL) .......... = feet PRESSURE ............ = psig P I P E L I N E D A T A STATUS CODE: XX -CLOSED PIPE P I P E NODE NAMES N A M E #1 #2 ---------------------------------- P-1 J-2 R-1 2-2 J-3 J-4 P-3 J-1 J-9 P-4 J-4 J-5 P-5 0-Pump-1 J-4 P-6 J-5 J-8 P-7 0-Pump-2 J-5 P-8 J-9 J-6 P-9 0-Pump-6 J-9 P-10 J-7 J-10 P-11 J-8 J-7 P-12 J-6 J-2 P-13 0-Pump-3 J-8 P-14 J-10 J-2 P-15 0-Pump-4 J-10 P-16 0-Pump-5 J-6 N 0 D E D A T A NODE NAME J-1 J-2 J-3 J-4 J- 5 J-6 J-7 J-8 J- 9 J-10 NODE EXTERNAL TITLE DEMAND (gpm) --------------------- 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CV -CHECK VALVE LENGTH DIAMETER ROUGHNESS MINOR (ft) (in) COEFF. LOSS COEFF_ ------------------------------------------- 366.45 3.17 140.0000 0.00 109.76 2.15 140.0000 0.00 21.43 2.15 140.0000 0.00 360.01 2.15 140.0000 0.00 100.00 1.72 140.0000 0.00 129.22 2.15 140.0000 0.00 100.00 1.72 140.0000 0.00 47.89 2.15 140.0000 0.00 100.00 1.72 140.0000 0.00 400.44 3.17 140.0000 0.00 748.06 3.17 140.0000 0.00 121.54 2.15 140.0000 0.00 100.00 1.72 140.0000 0.00 261.87 3.17 140.0000 0.00 100.00 1.72 140.0000 0.00 100.00 1.72 140.0000 0.00 JUNCTION EXTERNAL ELEVATION GRADE (ft) (ft) --------------------------- 26.00 27.00 27.00 26.00 26.00 27.00 26.00 26.00 27.00 25.00 O-Pump-1 ---- 26.00 21.00 O-Pump-2 ---- 27.00 22.00 O-Pump-3 ---- 27.00 22.00 0-Pump-4 ---- 24.00 19.00 R-1 ---- 27.00 22.00 0-Pump-5 ---- 27.00 22.00 O-Pump-6 ---- 27.00 22.00 P I P E L I N E R E S U L T S STATUS CODE: XX -CLOSED PIPE CV -CHECK VALVE P I P E NODE NUMBERS FLOWRATE HEAD MINOR LINE HL+ML/ HL/ N A M E #1 #2 LOSS LOSS VELO. 1000 1000 ----------------------------------------------------------------------------------------- gpm ft ft ft/s ft/f ft/f P-1 J-2 R-1 88.32 5.95 0.00 3.60 16.25 16.25 P-2 J-3 J-4 0.00 0.00 0.00 0.00 0.00 0.00 P-3 J-1 J-9 0.00 0.00 0.00 0.00 0.00 0.00 P-4 J-4 J-5 29.38 5.03 0.00 2.60 13.96 13.96 P-5 O-Pump-1 J-4 29.38 4.13 0.00 4.06 41.29 41.29 P-6 J-5 J-8 58.80 6.52 0.00 5.20 50.47 50.47 P-7 0-Pump-2 J-5 29.42 4.14 0.00 4.06 41.41 41.41 P-8 J-9 J-6 29.53 0.67 0.00 2.61 14.09 14.09 P-9 0-Pump-6 J-9 29.53 4.17 0.00 4.08 41.68 41.68 P-10 J-7 J-10 58.80 3.06 0.00 2.40 7.65 7.65 P-11 J-8 J-7 58.80 5.72 0.00 2.40 7.65 7.65 P-12 J-6 J-2 29.53 1.71 0.00 2.61 14.09 14.09 P-13 0-Pump-3 J-8 0.00 0.00 0.00 0.00 0.00 0.00 P-14 J-10 J-2 58.80 2.00 0.00 2.40 7.65 7.65 P-15 O-Pump-4 J-10 0.00 0.00 0.00 0.00 0.00 0.00 P-16 0-Pump-5 J-6 0.00 0.00 0.00 0.00 0.00 0.00 N 0 D E R E S U L T S NODE NODE EXTERNAL HYDRAULIC NODE PRESSURE NODE NAME TITLE DEMAND GRADE ELEVATION HEAD PRESSURE ------------------------------------------------------------------------------ gpm ft ft ft psi J-1 0.00 30.34 26.00 4.34 1.88 J-2 0.00 27.95 27.00 0.95 0.41 J-3 0.00 50.29 27.00 23.29 10.09 J-4 0.00 50.29 26.00 24.29 10.52 J-5 0.00 45.26 26.00 19.26 8.35 J-6 0.00 29.67 27.00 2.67 1.16 J-7 0.00 33.02 26.00 7.02 3.04 J-8 0.00 38.74 26.00 12.74 5.52 J-9 0.00 30.34 27.00 3.34 1.45 J-10 0.00 29.96 25.00 4.96 2.15 0-Pump-1 ---- 54.41 26.00 28.41 12.31 0-Pump-2 ---- 49.40 27.00 22.40 9.71 O-Pump-3 ---- 38.74 27.00 11.74 5.09 O-Pump-4 ---- 29.96 24.00 5.96 2.58 R-1 ---- 22.00 27.00 -5.00 -2.17 0-Pump-5 ---- 29.67 27.00 2.67 1.16 O-Pump-6 ---- 34.51 27.00 7.51 3.25 M A X I M U M A N D M I N I M U M V A L U E S P R E S S U R E S JUNCTION MAXIMUM JUNCTION MINIMUM NUMBER PRESSURES NUMBER PRESSURES --------------------- psi --------------------- psi 0-Pump-1 12.31 R-1 -2.17 J-4 10.52 J-2 0.41 J-3 10.09 J-6 1.16 0-Pump-2 9.71 0-Pump-5 1.16 J-5 8.35 J-9 1.45 V E L O C I T I E S PIPE MAXIMUM PIPE MINIMUM NUMBER VELOCITY NUMBER VELOCITY --------------------- (ft/s) --------------------- (ft/s) P-6 5.20 P-10 2.40 P-9 4.08 P-11 2.40 P-7 4.06 P-14 2.40 P-5 4.06 P-4 2.60 P-1 3.60 P-8 2.61 S U M M A R Y O F I N F L O W S A N D O U T F L O W S (+) INFLOWS INTO THE SYSTEM FROM SUPPLY NODES (-) OUTFLOWS FROM THE SYSTEM INTO SUPPLY NODES NODE FLOWRATE NODE NAME -------------------------------------------- gpm TITLE Pump-1 29.38 Pump-2 29.42 Pump-6 29.53 R-1 -88.32 NET SYSTEM INFLOW = 88.32 NET SYSTEM OUTFLOW = -88.32 NET -------------------------------------------------------------- SYSTEM DEMAND = 0.00 ***** HYDRAULIC ANALYSIS COMPLETED ***** FAIRWAY ACRES PROBABILITY METHOD HYDRAULIC MODEL **this sample is to satisfy the Probability method approach of X number of pumps operating in the system, per DEQ requirements. **Crane does not prescribe to this method, but rather uses the Rational Method for hydraulic modeling of centrifugal pumps, as recommended by EPA. ** The Probability Method is not designed to be used with centrifugal pumps, and only accounts for a consistent 11 GPM per pump, not accounting for a pump curve. i FAIRWAY ACRES - BRUNSWICK COUNTY, NC ] : y JL CRAN E P,,=p,ama�, PUMPS & SYSTEMS 9 rt= p PIPE SCHEMATIC 4= 2 `- EFA FC RMULA I ❑=AN+B O r- 4 - - ` '°"'" "' " y�, A=11 : B-28 : N-60 : CP-88 GPM 4 GPD=480 GPD : C FACTOR=140 : PIPE MATL-SDR-21 7�7 FAIRWAY ACRES - BRUNSWICK COUNTY, NC ump-4 P Fump-3 Pump-1 J-5 J-8 J-7 J-g J-2 J 3 f ump-2 J-6 J _-pump-5 j¢ R Pump-6 S° PipeDiammr CRANE$ O =t ® r= 125 PUMPS & SYSTEMS c 12 .1 � c= NG{3E NRMES EPAPORMULA, O-AN-B `35 A-1-2 -B-22 N-51) 9"68 GPM ' 4 GPD-160GP0 C A-=R•140 PIPE MATL•SOR-2[ ************************************************ S U M M A R Y O F O R I G I N A L D A T A ************************************************ U N I T S S P E C I F I E D FLOWRATE ............ = gallons/minute HEAD (HGL) .......... = feet PRESSURE ............ = psig P I P E L I N E D A T A STATUS CODE: XX -CLOSED PIPE CV -CHECK VALVE P I P E NODE NAMES LENGTH DIAMETER ROUGHNESS MINOR N A M E #1 #2 (ft) (in) COEFF. LOSS COEFF. ------------------------------------------------------------------------------- P-1 J-2 R-1 366.45 3.17 140.0000 0.00 P-2 J-3 J-4 109.76 2.15 140.0000 0.00 P-3 J-1 J-9 21.43 2.15 140.0000 0.00 P-4 J-4 J-5 360.01 2.15 140.0000 0.00 P-5 O-Pump-1 J-4 100.00 1.72 140.0000 0.00 P-6 J-5 J-8 129.22 2.15 140.0000 0.00 P-7 0-Pump-2 J-5 100.00 1.72 140.0000 0.00 P-8 J-9 J-6 47.89 2.15 140.0000 0.00 P-9 0-Pump-6 J-9 100.00 1.72 140.0000 0.00 P-10 J-7 J-10 400.44 3.17 140.0000 0.00 P-11 J-8 J-7 748.06 3.17 140.0000 0.00 P-12 J-6 J-2 121.54 2.15 140.0000 0.00 P-13 0-Pump-3 J-8 100.00 1.72 140.0000 0.00 P-14 J-10 J-2 261.87 3.17 140.0000 0.00 P-15 0-Pump-4 J-10 100.00 1.72 140.0000 0.00 P-16 0-Pump-5 J-6 100.00 1.72 140.0000 0.00 N 0 D E D A T A NODE NODE EXTERNAL JUNCTION EXTERNAL NAME TITLE DEMAND ELEVATION GRADE (gpm) (ft) (ft) -------------------------------------------------------------- J-1 0.00 26.00 J-2 0.00 27.00 J-3 0.00 27.00 J-4 0.00 26.00 J-5 0.00 26.00 J-6 0.00 27.00 J-7 0.00 26.00 J-8 0.00 26.00 J-9 0.00 27.00 J-10 0.00 25.00 0-Pump-1 ---- 26.00 21.00 0-Pump-2 ---- 27.00 22.00 0-Pump-3 ---- 27.00 22.00 0-Pump-4 ---- 24.00 19.00 R-1 ---- 27.00 22.00 0-Pump-5 ---- 27.00 22.00 0-Pump-6 ---- 27.00 22.00 P I P E L I N E R E S U L T S STATUS CODE P I P E N A M E ------------ P-1 P-2 P-3 P-4 P-5 P-6 P-7 P-8 P-9 P-10 P-11 P-12 P-13 P-14 P-15 P-16 XX -CLOSED PIPE CV -CHECK VALVE NODE NUMBERS FLOWRATE HEAD MINOR LINE HL+ML/ HL/ #1 #2 LOSS LOSS VELD. 1000 1000 --------------------------------------------------------------------------- gpm ft ft ft/S ft/f ft/f J-2 R-1 175.66 21.27 0.00 7.16 58.05 58.05 J-3 J-4 0.00 0.00 0.00 0.00 0.00 0.00 J-1 J-9 0.00 0.00 0.00 0.00 0.00 0.00 J-4 J-5 29.12 4.94 0.00 2.58 13.73 13.73 0-Pump-1 J-4 29.12 4.06 0.00 4.02 40.62 40.62 J-5 J-8 58.29 6.42 0.00 5.16 49.67 49.67 0-Pump-2 J-5 29.17 4.08 0.00 4.03 40.77 40.77 J-9 J-6 29.39 0.67 0.00 2.60 13.97 13.97 0-Pump-6 J-9 29.39 4.13 0.00 4.06 41.31 41.31 J-7 J-10 87.53 6.40 0.00 3.57 15.98 15.98 J-8 J-7 87.53 11.95 0.00 3.57 15.98 15.98 J-6 J-2 58.77 6.13 0.00 5.20 50.43 50.43 0-Pump-3 J-8 29.23 4.09 0.00 4.04 40.92 40.92 J-10 J-2 116.89 7.15 0.00 4.76 27.30 27.30 0-Pump-4 J-10 29.36 4.12 0.00 4.05 41.25 41.25 0-Pump-5 J-6 29.39 4.13 0.00 4.06 41.33 41.33 N 0 D E R E S U L T S NODE NODE EXTERNAL HYDRAULIC NAME TITLE DEMAND GRADE -------------------------------------------------- gpm ft J-1 0.00 50.07 J-2 0.00 43.27 J-3 0.00 80.13 J-4 0.00 80.13 J-5 0.00 75.19 J-6 0.00 49.40 J-7 0.00 56.82 J-8 0.00 68.77 J-9 0.00 50.07 J-10 0.00 50.42 0-Pump-1 ---- 84.19 0-Pump-2 ---- 79.26 0-Pump-3 ---- 72.86 0-Pump-4 ---- 54.55 NODE PRESSURE NODE ELEVATION HEAD PRESSURE ft --------------------------- ft psi 26.00 24.07 10.43 27.00 16.27 7.05 27.00 53.13 23.02 26.00 54.13 23.46 26.00 49.19 21.31 27.00 22.40 9.71 26.00 30.82 13.35 26.00 42.77 18.53 27.00 23.07 10.00 25.00 25.42 11.02 26.00 58.19 25.22 27.00 52.26 22.65 27.00 45.86 19.87 24.00 30.55 13.24 R-1 ---- 22.00 27.00 O-Pu7p-5 ---- 53.53 27.00 0-Pump-6 ---- 54.20 27.00 M A X I M U M A N D M I N I M U M V A L U E S P R E S S U R E S -5.00 -2.17 26.53 11.50 27.20 11.79 JUNCTION MAXIMUM JUNCTION MINIMUM NUMBER PRESSURES NUMBER PRESSURES --------------------- psi --------------------- psi C-Pump-1 25.22 R-1 -2.17 J-4 23.46 J-2 7.05 J-3 23.02 J-6 9.71 0-Pump-2 22.65 J-9 10.00 J-5 21.31 J-1 10.43 V E L O C I T I E S PIPE MAXIMUM PIPE MINIMUM NUMBER VELOCITY NUMBER VELOCITY (ft/s) (ft/s) P-1 1.16 P-4 2.58 P-12 5.20 P-8 2.60 P-6 5.16 P-10 3.57 P-14 4.76 P-11 3.57 P-16 4.06 P-5 4.02 S U M M A R Y O F I N F L O W S A N D O U T F L O W S (+) INFLOWS INTO THE SYSTEM FROM SUPPLY NODES (-) OUTFLOWS FROM THE SYSTEM INTO SUPPLY NODES NODE FLOWRATE NODE NAME -------------------------------------------- gpm TITLE Pump-1 29.12 Pump-2 29.17 Pump-3 29.23 Pump-4 29.36 Pump-5 29.39 Pump-6 29.39 R-1 -115.66 NET SYSTEM INFLOW = 175.66 NET SYSTEM OUTFLOW = -175.66 NET -------------------------------------------------------------------------------- SYSTEM DEMAND = 0.00 ***** HYDRAULIC ANALYSIS COMPLETED ***** 541.0 Trinity Road T(N, MO S GROUP Suite102 YOUR VISION ACHIEVED THROUGH OURS. Raleigh, NC 27607 MEMORANDUM TO: John Wall, PE — Timmons Group FROM: Ashley Kabat, PE — Timmons Group DATE: July 7, 2023 RE: Fairway Acres Downstream Sewer Capacity Mr. Wall, P 919.866.4951 F 919.859.5663 www.timmons.com Timmons Group communicated with Amy Aycock from Brunswick County about the sanitary sewer capacity available for the Fairway Acres development. After taking into consideration existing and anticipated flows, Timmons Group and Brunswick County agree that there is adequate capacity downstream if the proposed development connects to the existing sewer on Oakbrook Drive. The email correspondence is attached. Please advise if a more extensive sewer study is required for this project. Sincerely, f, 7 Ashley Kaki t SURVEYING John Wall From: Amy Aycock <amy.aycock@brunswickcountync.gov> Sent: Tuesday, September 20, 2022 10:27 AM To: John Wall Cc: Ashley Kabat; William Pinnix Subject: RE: Brick Landing Sewer Attachments: Oakbrook GIS.pdf Hi John, I have reviewed this proposal and it looks like the design will work to tie into the Oakbrook Dr. (I have attached a GIS snapshot, it looks like.this address is 1770 Oakbrook Dr which will have the easement.) The only issue with this design, is the low pressure forcemain will also go through the Bricklanding golf course property before the Oakbrook Dr lot, so you will also need to get an easement from them. There is still flow available in this system.... Please let me know if you have any other questions. Thank you, Amy A�cocL Engineering Project Manager Brunswick County Office: 910-253-2407 Cell: 910-471-4049 Email: am .a cock brunswickcount nc. ov From: John Wall <John.Wall@timmons.com> Sent: Monday, September 19, 2022 4:47 PM To: Amy Aycock <amy.aycock@brunswickcountync.gov> Cc: Ashley Kabat <Ashley.Kabat@timmons.com> Subject: RE: Brick Landing Sewer CAUTION: This email originated from outside of Brunswick County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Amy, We are working through the Fairway Acres plans (fka Hewitt Tract) and we have a small plan change with the low- pressure sewer tie-in. Previously we proposed to tie into the manhole on Deerfield Drive, but the owner had issues with obtaining an easement on the vacant Saccoccio property that would get us to the existing manhole. We had a second option of tying into the manhole on Oakbrook Drive SW, which we have pursued. The owner has purchased the vacant Hendrix lot and we will be utilizing that to reach the Oakbrook Drive SW manhole. Do you foresee any issues with our revised low-pressure route and tie-in, or have any preliminary comments? Previously you had let Ashley know that the downstream sanitary sewer had available capacity. The Deerfield Dr sanitary and Oakbrook Drive SW sanitary sewer both gravity to the same Lift Station.