HomeMy WebLinkAboutNiells Interceptor Capacity Summary( N - O) / P (d/D)
36 Inch Interceptor SS1 PVC 36 0.050%0.013 66.7%5263 4570 60.0%225.04 224.79 100.00
42 Inch Interceptor SS2 PVC 42 0.050%0.013 66.7%7939 5897 54.0%367.00 366.00 163.82
48 Inch Interceptor SS3 PVC 48 0.050%0.013 66.7%11335 6941 48.0%365.80 353.90 387.88
Date:1/12/2021
A B C D E F G H I J
NEILS CREEK GRAVITY SEWER ANALYSIS:
MINIMUM DESIGN SLOPES
PROPOSED FLOW
(GPM)% FULL PROPOSED INV. OUT
ELEV.
INV. IN
ELEV.
LENGTH
(FT.)
N O P
SSMH NUMBER PIPE SEGMENT MANNING (N)% FULL
ALLOWABLE
ALLOWABLE FLOW
(GPM)MATERIAL DIA. (INCHES)
MINIMUM
DESIGN SLOPE
(%)
ALLOWABLE FLOW = 448.8 * (1.49/F) * (AREA @ 66.7%) * ((HYDRAULIC RADIUS @ 66.7%)^(2/3)) * √(E)
PERCENT FULL = q/Qfull TO GET PROPORTIONAL FLOW DEPTH (d/D)
HARNETT 401 - Downstream SSWR Capacity Summary
Flow Units Notes
Calculated Capacity in the 36" Interceptor 7.58 MGD Calculated based on 2/3 full
Allocated Peak Flows Thru 36"6.00 MGD Based on value provided by HCDPU
Future Flow through interceptor from Harnett
County 0.002 MGD
Future Flow from The Serenity Project 0.0558 MGD From Serenity Phase 1 & 2
Future Flow from Harnett 401 Project 0.175 MGD 480 Lots and 2.8 Acres of Commercial
Total Future Flows 0.232 MGD
Peaked Future Flows with 2.5 PF 0.581 MGD Multiply Total Future Flows by 2.5
Total Flows 6.581 MGD
Percent Full 60.0%d/D (Calculated)
Flow Units Notes
Calculated Capacity in the 42" Interceptor 11.43 MGD Calculated based on 2/3 full
Existing Peak Flows Thru 42"7.15 MGD Based on reported numbers from HCDPU
Future Flow through interceptor from Harnett
County 0.132 MGD
Future Flow through interceptor from Town of
Angier 0.174 MGD
Flow from The Serenity 0.0558 MGD From Serenity Pump Station @ Buildout
Flow from Harnett 401 0.175 MGD 480 Lots and 2.8 Acres of Commercial
Total Future Flows @ Average Daily Flows 0.536 MGD
Peaked Flows with 2.5 Peaking Factor 1.341 MGD Multiply Total Future Flows by 2.5
Total Flows 8.491 MGD
Percent Full 54.0%d/D (Calculated)
Flow Units Notes
Calculated Capacity in the 4" Interceptor 16.32 MGD Calculated based on 2/3 full
Existing Peak Flows Thru 42"8.30 MGD Estimated based on numbers from HCDPU
Future Flow through interceptor from Harnett
County 0.274 MGD
Future Flow through interceptor from Town of
Angier 0.174 MGD
Flow from The Serenity 0.0558 MGD From Serenity Phase 1 & 2
Flow from Harnett 401 0.175 MGD 480 Lots and 2.8 Acres of Commercial
Total Future Flows @ Average Daily Flows 0.678 MGD
Peaked Flows with 2.5 Peaking Factor 1.696 MGD Multiply Total Future Flows by 2.5
Total Flows 9.996 MGD
Percent Full 48.0%d/D (Calculated)
Capacity in 36" Neills Interceptor
Capacity in 42 Inch Interceptor
Capacity in 48 Inch Interceptor