West Clayton NCP – Stage 1
Citizens Advisory Committee Meeting #7
Preliminary Utility Servicing Summary
Agenda
•
Water Distribution
•
Sanitary
y Sewer
• Stormwater Infrastructure
West Clayton CAC #7
West Clayton NCP – Water Distribution
Existing Water Network
•
Existing watermains: 100mm – 150mm dia.
•
Supply from Clayton Booster Stn – 115m Pressure Zone (PZ)
•
Water supply sources in area:
•

City’ss PRV at 72 Ave / 184 St (90m PZ)
City

Metro Vancouver’s Clayton Reservoir (90m PZ)

City’s Clayton Booster Station (115m PZ)
Interconnections

250mm watermain on 180 St, south of Fraser Hwy

300mm watermain on 182 St, south of Fraser Hwy
West Clayton CAC #7
West Clayton NCP – Water Distribution
Existing Water Network
West Clayton CAC #7
West Clayton NCP – Water Distribution
Water Servicing Objectives
• Maximize area of 90m PZ
• Use PRV at 72 Ave / 184 St until capacity reached
• Utilize Metro Vancouver’s Clayton Reservoir for long-term
supply
• Utilize Clayton Booster Stn.
Stn for supply to 115m PZ
• Interconnect 90m zone south of Fraser Hwy (redundancy)
• Consider future servicing of North Clayton NCP
West Clayton CAC #7
West Clayton NCP – Water Distribution
Proposed
p
Water Servicing
g Strategy
gy
West Clayton CAC #7
West Clayton NCP – Water Distribution
Water Network Constraints & Upgrades
90m Pressure Zone

Reconfigure & upgrade PRV at 72 Ave & 184 St

New 750mm watermain on 72 Ave (from reservoir to 188 St) for
West Clayton
y
+ North Clayton
y
NCP

New 300mm watermain on 72 Ave (from 188 St to 184 St) for
West Clayton NCP

Connect to existing watermain (Fraser Hwy & 180/182 St)
115m Pressure Zone

Upgrade watermain on 72 Ave (186 to 188 St)

Add additional 300 L/s pump at Clayton Booster Stn
West Clayton CAC #7
West Clayton NCP – Water Distribution
Water Financial Summary
DCC Eligible Projects / Costs

$6.2 Million +/-
DCC Revenue

West Clayton CAC #7
$7.6
$
6 Million
o +//
West Clayton NCP – Sanitary Sewer
Existing Sewer System
• No existing sewer in NCP area
• 3 downstream connections:

1050mm North Cloverdale Trunk Sewer – 72 Ave / 177A St

300mm sewer – 182 St south of Fraser Hwy

300mm sewer – 184 St & 70 Ave
• All sewers flow to North Cloverdale Lift Station
• Cloverdale Trunk Sewer: Lift Station to Metro Vancouver
West Clayton CAC #7
West Clayton NCP – Sanitary Sewer
Existing
g Sewer System
y
West Clayton CAC #7
West Clayton NCP – Sanitary Sewer
Sewer Servicing Strategy
•
95% of NCP to be serviced by
y gravity
g
y
•
Extend 1050mm sewer / North Cloverdale Trunk Sewer (NCTS)
from Fraser Highway / 72 Ave to 188 St / 80 Ave
•
NCTS to run along 7 to 10m contour:
•

Lots above NCTS to be serviced by gravity

L t below
Lots
b l
NCTS tto b
be serviced
i db
by llow pressure sewer
Lots near 184 St and 71 Ave can discharge south across Fraser
Highway.
West Clayton CAC #7
West Clayton NCP – Sanitary Sewer
Proposed
p
Sewer Servicing
g Strategy
gy
West Clayton CAC #7
West Clayton NCP – Sanitary Sewer
Sanitary Sewer Phasing Constraints
•
Lots north of 71 Ave require NCTS extension before development

NCTS extension across Fraser Hwy

GVWD Watermain Relocation

Right-of-way requirements / ALR / watercourse crossings
•
Lots on 74 Ave, east of 193 St : below-grade basements not
se ceab e
serviceable
•
North Cloverdale Lift Station existing capacity is fully committed
West Clayton CAC #7
West Clayton NCP – Sanitary Sewer
Sanitary Sewer Upgrades
•
North Cloverdale Lift Station requires upgrades to service NCP
(Qpeak = 496 L/s)
•
1.4 km of downstream sewers require upsizing to service NCP
•
Additional upgrades would be required to service future North
Clayton NCP

F th Lift Station
Further
St ti Upgrade
U
d (Qpeak = 811 L/
L/s))

800m of 600mm forcemain

Additional 700m of downstream sewers
West Clayton CAC #7
West Clayton NCP – Sanitary Sewer
Financial
DCC Eligible Projects / Costs

$18.3 Million +/-
DCC Revenue

West Clayton CAC #7
$10
$
0 Million
o +//
West Clayton NCP – Stormwater
Existing Stormwater System
• No storm sewer system in area
• Ditches, culverts, creeks and ravine escarpment
g
lowlands,, Latimer Cr & North Cr
• NCP drains to agricultural
• Numerous tributaries & wooded areas
West Clayton CAC #7
West Clayton NCP – Stormwater
Existing
g Drainage
g System
y
West Clayton CAC #7
West Clayton NCP – Stormwater
Stormwater / Watershed Constraints
•
Flooding
g in lowland channels
•
Erosion of ravine streams
•
Maintaining groundwater recharge and pathways
•
Loss of habitat (forests, streams, etc.)
•
Habitat fragmentation
West Clayton CAC #7
West Clayton NCP – Stormwater
Stormwater Servicing Strategy
•
Clayton
y
Integrated
g
Stormwater Management
g
Plan ((ISMP))
•
Minor system: storm sewers to convey 5-year flows
•
Major system: safe conveyance for 100-year flows
•
Stormwater ponds for storage and water quality (100-year)
•
Infiltration BMP’s in road right-of-way and on-lot

Recharge groundwater

Sustain creek baseflows

Reduce erosion in ravines
West Clayton CAC #7
West Clayton NCP – Stormwater
Proposed
p
Stormwater Servicing
g Strategy
gy
West Clayton CAC #7
West Clayton NCP – Stormwater
Stormwater Servicing Strategy (cont’d)
•
5 km of trunk sewers required
q
•
4 low-flow diversion structures proposed
•
Optimized & consolidate stormwater ponds: 2 ponds proposed

Pond # 1 near Fraser Hwy & 72 Ave (0.3 ha)

Pond # 2 near 184 St & 80 Ave (1.0 ha)
•
Lots near 184 St & 70 Ave can drain south across Fraser Highway
•
Creek setback & corridors incorporated into land-use plan
•
On-lot stormwater infiltration BMP’s
West Clayton CAC #7
West Clayton NCP – Stormwater
Financial
DCC Eligible Projects / Costs

$14.1 Million +/-
DCC Revenue

West Clayton CAC #7
$10.5 Million +/-