Map of Current Water System (section relevant for EWB-MAP modifications)

RED lines – supply lines to tank (uphill by pump)BLUE lines – distributions lines by gravity

Proposed update to Water System (section relevant for EWB-MAP modifications)

RED lines – supply lines to tank (uphill by pump)BLUE lines – distributions lines by gravity

NEW

SUP

PLY

LINE

1

NEW DISTRIBUTION LINE 2c

NEW DISTRIBUTION

LINE 2a

NEW

DI

STRI

BUTI

ON

LINE

2bNEW TANK

A

B

C

D

E

F

Piping System LayoutNew Pipelines

• Supply Line 1 to new tank (A-B-C)– Length = 365 m + tank connection (assume +

10 m) = 375 m– 1 bend, 1 tee, 3 elbow, 2 valves, 1 exit– 17 m elevation rise + tank height– Hill rises to 643 m then valley falls t0 640 m

on connecting road (D-B)– ~175 gpm flowrate

• Distribution line connection 2a from lower Tramo 3b to lower Tramo 6 (E-F)

– 105 m length, elevation change unclear, guess 10 m drop

• Distribution connection 2b from upper Tramo 3b to upper Tramo 6 (B-D)

– 120 m length, 8 meter drop with low point at 640 m (3 m below D)

• Distribution line 2c from new tank to new connections (C-B-E)

– 255 m length, 11 meter elevation drop

WaypointsPoint Location Elevation

A Calle Principal 638 m

B Intersection at Field

651 m

C New tank 655 m

D End of upper Tramo 6

643 m

E End of lower Tramo 3b

640 m

F End of lower Tramo 6

?? Guess 630 m

Proposed update to Water System (section relevant for EWB-MAP modifications)

RED lines – supply lines to tank (uphill by pump)BLUE lines – distributions lines by gravity

NEW

SUP

PLY

LINE

1

NEW TANK

A

B

C

105 m

20 m

240

m

Estimate of head losses in supply pipe 1 (smooth PVC)

4” PVC sufficient to keep major and minor losses to >10% of the elevation change

Item 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 3-1/2" 4"D_pipe (in) 1.029 1.36 1.59 2.047 2.445 3.042 3.521 3.998D_pipe (m) 0.026 0.035 0.040 0.052 0.062 0.077 0.089 0.102A (m^2) 5.37E-04 9.37E-04 1.28E-03 2.12E-03 3.03E-03 4.69E-03 6.28E-03 8.10E-03A (cm^2) 5.37 9.37 12.81 21.23 30.29 46.89 62.82 80.99V (m/s) 20.50 11.74 8.59 5.18 3.63 2.35 1.75 1.36Re 5.36E+05 4.05E+05 3.47E+05 2.69E+05 2.26E+05 1.81E+05 1.57E+05 1.38E+05f 0.0117 0.0125 0.0130 0.0139 0.0145 0.0153 0.0159 0.0164

h_L major (m) 3593.8 955.5 454.9 137.0 58.9 20.9 10.4 5.7h_L minor (m) 267.7 87.7 47.0 17.1 8.4 3.5 2.0 1.2h_L major (% of z) 4667.3% 1240.9% 590.8% 177.9% 76.5% 27.1% 13.5% 7.4%h_L minor (% of z) 347.6% 113.9% 61.0% 22.2% 10.9% 4.6% 2.5% 1.5%

Assumptions for Supply Pipe 1 Calculation

Flow 175 gallons/min

Flow 0.011 m3/shttp://www.engineeringtoolbox.com/flow-units-converter-d_405.html

mu 0.001 Ns/m2

http://www.engineeringtoolbox.com/water-dynamic-kinematic-viscosity-d_596.html

rho 1000 kg/m3roughness 0Length 375 m

sum K_L fittings 12.48conservative estimate: 5 90 elbow, 1 45 elbow, pipe exit, 2 open valves

Pump-to-Tank Elevation Change77 m

Supply Pipe 1 Pipe Profile(not to scale)

NEW TANK

A

B

C

105 m

20 m 240 m

D638 m

640 m

643 m

651 m

Elevation:640 m

655 m

Tee connect

to 6” pipe

Gate Valve

45° Elbow

90° Elbow

Gate Valve

90° Elbow

90° Elbow

Pipe ExitPIPE FITTINGS

Supply Pipe 1 Trenching• Based on recommendations from EWB Water Resource Guidelines:

– 45 cm trench depth– 10 cm bedding (2-12 mm soil) if stones/rocks present in trench– Back-fill with soil that is free of lumps, from stones (>3 cm), and from

organic matter– PVC pipe joined in trench and cure for >10 hr prior to pressurizing. Keep

joints exposed to check for leaks– For road crossing, bury PVC pipe inside steel or concrete pipe (ID > diameter

of PVC joints) and bury at same depth as standard trench

45 cm trench depth

10 cm bedding

Thrust Anchors for Elbows &Tees

From Russ Turner, Tetratech

Thrust Anchor DimensionsBased on• 4” PVC PIPE• 45 cm Trench Depth

Height of Anchor 22.5 cm

Length of Anchor Backing against undisturbed material:• 90° BEND: L = 83 cm• 45° BEND: L = 41 cm• Tee: L = 41 cm

Supply Pipe 1 Materials List• 4” PVC pipe (Schedule 40) in 6 m lengths – 62 pieces• 4” PVC 45° Elbow – 1 piece• 4” PVC 90° Elbow – 1 piece• Tee connector & Adapter from 6” PVC main to 4” branch line – 1 piece• PVC primer, PVC cement, applicators, and cleanup• Gate/Ball valves (PVC or steel ?) – 2 pieces• 4” Steel Pipe (5 m) – 1 piece• 4” Steel 90° Elbow – 2 pieces• 4” PVC-Steel Pipe Connector – 1 piece• Bed material for trench (2-12 mm), if necessary• Fill material, if necessary• Concrete for Anchoring Piping at Bends• Concrete/Rebar for Valve boxes and lids• Tools for cutting, de-burring, connecting pipe

EPA-NET Simulation for Supply Line 1 Matches Excel Calculations

1

2

3

4

56

1

2

3

4

76

5

WELL PUMP

TANK

LOW POINT

BRANCH POINT

Head

25.00

50.00

75.00

100.00

ft