2015-12-09 epb dcc final report document...dec 09, 2015 · ps#2 catchment, the pump station,...

PARSONS Technical Memorandum To: Sanath Bandara, P.Eng Manager of Engineering Services

From: Todd Bowie, P.Eng

Date: December 9, 2015

Re: East Porpoise Bay Sanitary Sewer Expansion Study

1 Scope

This Technical Memorandum presents the proposed conceptual sanitary servicing plan for the future

East Porpoise Bay (EPB) sanitary sewer servicing area.

The conceptual sanitary servicing plan was established based on the proposed land‐use plan for the

area, existing topography, and population growth assumptions. The conceptual sanitary servicing plan

establishes conceptual infrastructure requirements and minimum pipe sizes based on existing average

ground slopes. Final pipe sizing, infrastructure requirements and associated capital costs will need to be

verified during preliminary and detailed design activities based on actual pipe slopes.

Funding options are also discussed using preliminary capital cost estimates from the conceptual sanitary

servicing plan as a basis. The next steps for finalizing the servicing plan and funding requirements are

also provided.

2 Background

Parsons was retained by the District of Sechelt (District) in 2011 to assess and develop a sanitary

servicing plan for the East Porpoise Bay (EPB) area. Two memorandums were prepared: The first memo

dated November 30, 2011 presented zoning, the design population and high level flow estimates. The

second memo dated December 20, 2011 presented two conceptual servicing arrangements based on

the layout of the existing facilities and future land use. Following submission of these two technical

memorandums, the project was placed on hold pending changes to the District’s sewage treatment

strategy.

With the treatment strategy now established and in the process of being implemented, the District

requested that Parsons update the conceptual servicing strategy for the EPB area and complete the EPB

Sewer Expansion Study.

East Porpoise Bay Sanitary Sewer Expansion Study

of 7

3 Conceptual Sewer Servicing Strategy

3.1 Study Area

The proposed EPB sanitary sewer expansion area and existing zoning is displayed in Figure 1. The

existing land use for the expansion area is primarily residential and industrial. Future zoning is displayed

in Figure 2. Proposed changes include increased densities in residential areas, increased industrial

areas, and the addition of commercial areas.

We understand that there is a proposed development (Sechelt Sustainable Community) that is situated

north of the EPB sewer service area. Conveyance of flows from developments north of the EPB area are

not included in this study.

3.2 Design Assumptions

Guidelines, parameters, and assumptions used to establish sanitary sewer flow predictions for the

future zoning are summarized in Table 1. Deviations from Bylaw 430 have been agreed to by the

District.

Table 1: Summary of Design Assumptions

Parameter Value Reference Source / Comments

Residential Areas

Residential Density 8 units/hectare Provided by the District

Population per Household 2.25 people/household Sechelt Sewer Functional Plan

Sanitary per Capita Demand 410 litres/capita/day Bylaw No. 430

Residential Area Summary 7,380 litres/hectare/day

Industrial Areas

Industrial Area per Capita Demands

68 litres/capita/employee 40 employees/hectare =2,720 litres/hectare/day

Sewerage System Standard Practice Manual. (Less than Bylaw 430). Assumes development is not water intensive such as industrial park. No industrial waste.

Commercial Areas

Hotel Demands 100 Rooms (assumed) 366 litres/day/room

Sewerage System Standard Practice Manual

Campground Demands 50 Sites (assumed) 365 litres/day/site

Sewerage System Standard Practice Manual

Other Parameters

Inflow & Infiltration 0.05 litres/hectare/sec Sechelt Sewer Functional Plan (Less than Bylaw 430)

Peaking Factor Harmon Sechelt Sewer Functional Plan (Less than Bylaw 430)


of 7

Parameter Value Reference Source / Comments

Design flow for Sanitary Sewers

Full build‐out of population based on future zoning.

Design Flow for Pump Stations

20 year population projection.

Population Growth 2.5% per year Provided by the District

Starting Population 272 residents Provided by the District

2034 Population 811 residents 2.5 % growth rate. Assumes that the Onni Development (261 residents) is fully populated by 2019.

Industrial / Commercial Growth

Assume 100% developed by 2034

3.3 Conceptual Sewer Servicing Strategy

Two conceptual servicing strategy arrangements were presented in the draft technical memorandum

dated December 20, 2011 for the District’s consideration. The District’s preference was Conceptual

Arrangement #2, with some modifications to adapt to the revised sewage treatment strategy. The

revised concept plan for the EPB sanitary sewer servicing strategy is presented in Figure 3 and described

below.

The EPB sanitary sewer area was subdivided into three primary catchments with a separate pump

station required for each catchment.

One pump station (PS#1) will be required at the east end of Marmot Road to service existing residences

north of Heron Road. This low‐head pump station would lift the sanitary sewage to a manhole at the

intersection of Marmot Road and Heron Road. It is anticipated that construction of this section of the

network can be deferred until requested by the local residents. These properties currently discharge to

private disposal fields.

A second pump station (PS#2) will be required at the foot of Yew Road to service areas north of Allen

Road. A gravity main would be installed along the waterfront from Allen Road to Burnett Road. This

pump station would direct flows through a new forcemain and tie‐in to the existing 350mm HDPE

forcemain at the intersection of Dusty Road and Sechelt Inlet Road. This existing forcemain would

convey flow to the Ebbtide Wastewater Treatment Plant.

A third pump station (PS#3) was constructed as part of the Onni Development. We understand that

PS#3 has the capacity to service the entire EPB collection area. Given the available capacity in the pump

station, the District could consider directing PS#2 flows to PS#3 prior to pumping to the Ebbtide


of 7

Wastewater Treatment Plant; however, it is anticipated that the operating costs would be higher with

that arrangement.

Based on Conceptual Arrangement #2, most of the oceanfront properties wanting to connect to the

District’s collection system within the EPB servicing area will need to pump to the proposed gravity

sewers to the east of their properties.

3.4 Design Flow Predictions

Sanitary sewer flows were calculated for two scenarios: 1) the 20‐year development horizon (2034); and

2) the full build‐out scenario. Population and flow predictions for the three pump‐station catchment

areas are summarized in Table 2. Design flow predictions are based on the population growth

assumptions for the catchment areas noted in Table 1. Calculations are included in Appendix A.

Table 2: Sanitary Design Flow Predictions

Parameter 20‐year Horizon (2034) Full Build‐Out

Pump Station 1

Residential Population 82 residents 82 residents

Peak Wet Weather Flow 161 m3/day 161 m3/day

Pump Station 2



Pump Station 3



East Porpoise Bay Service Area



4 Sanitary Servicing Capital Funding Mechanism

The District identified implementation of a district‐wide development cost charge (DCC) as the preferred

method of funding the EPB sanitary sewer servicing plan. The capital costs attributable to growth in the

EPB area were incorporated into the district‐wide capital costs established in the DCC Background

Report. Based on this, revised preliminary district‐wide DCC rates are identified which includes the EPB

area.


of 7

4.1 East Porpoise Bay DCC Projects

Preliminary capital cost estimates for the components of the preferred conceptual sanitary servicing

plan have been produced and the costs attributable to growth are summarized below. The District

anticipates 25% of the project funding for future capital works in the East Porpoise Bay area to come

from grant funding sources. Detailed cost estimates are attached in Appendix A.

Project Capital Costs Attributable to

Growth

$ 4,674,000

Less Assumed Grant Funding (25%) $ (1,168,000)

Less Municipal Assist Factor (1%) $ (47,000)

Preliminary estimate of capital costs to be

recovered through DCC’s

$ 3,459,000

4.2 Updated Sanitary Sewer DCC Rates

The DCC Background Report established growth projections for the District and identified DCC projects

within the existing Sechelt sewer service area. Based on this information, preliminary DCC rates for the

District were established.

Capital costs for servicing the EPB area were not included in the previous analysis and establishment of

DCC rates. However, it is assumed that the growth projections established in the DCC Background

Report did include growth that may occur in the EPB area.

Updated sanitary sewer DCC rates accounting for the EPB DCC projects are summarized in Table 3.

Table 3: District‐Wide DCC Rate per Equivalent Unit Calculations (including EPB)

Description Value

# of Equivalent Units (Draft DCC Background Report) 1,603

Net DCC Costs (Draft DCC Background Report) $ 8,487,000

Net DCC Costs (East Porpoise Bay Area) $ 3,459,000

Total Net DCC Costs $ 11,946,000

DCC per Equivalent Unit $ 7,452

The changes to the originally proposed DCC rates, established in the DCC Background Report, as a result

of adding the EPB area are provided in Table 4. The original proposed DCC rates from the DCC

Background Report are included for comparison.


of 7

Table 4: District‐Wide DCC Rate Comparison

Description Updated DCC Rate

including EPB Area

Original DCC Rate from

Background Report

Single Family /Unit $ 7,452 $ 5,294

Townhouse /Unit $ 6,185 $ 4,394

Apartment /Unit $ 4,993 $ 3,547

Congregate Care/ Bed $ 3,130 $ 2,223

Commercial /m2 $ 14.90 $ 10.59

Industrial /m2 $ 14.90 $ 10.59

Institutional /m2 $ 14.90 $ 10.59

5 Staging and Funding

Sanitary servicing of the EBP area is anticipated to require significant advanced funding from the District.

This area is essentially a green‐field and will require construction of pump stations, forcemains, and

sanitary trunk sewers to service this area. It is likely that this infrastructure will need to be constructed

prior to collection of sufficient DCC’s to fund the works.

The project staging and available funds will largely be driven by development. Development and

construction of the sanitary infrastructure would preferably occur from south to north. PS #3 was

constructed as part of the ONNI development. This allows for relatively cost effective expansion of the

sanitary sewer network in the PS#3 catchment area. However, once development starts to occur in the

PS#2 catchment, the pump station, forcemain, and trunk sewer for this area will need to be constructed.

In addition, based on the preferred Conceptual Arrangement, the PS#1 catchment area cannot be

serviced until the infrastructure to service the PS#2 catchment area has been constructed. If

development in the EPB area proceeds from north to south, a significant investment in infrastructure

will be required, potentially in advance of collecting adequate funds through DCC’s.

Sources of advanced funding that the District could consider, to fund capital projects within the EPB area

include:

Applicable DCC reserves;

Borrowing;

General taxation; and,

Senior Government grants.

These sources will need to be considered at the time infrastructure funding is required.


6 Conclusions and Recommendations The conceptual sanitary servicing plan was established based on the proposed land-use plan for the

area, existing topography, and population growth assumptions. The conceptual sanitary servicing plan

establishes conceptual infrastructure requirements and minimum pipe sizes based on existing average

ground slopes.

If the District decides to proceed with sanitary servicing to East Porpoise Bay, a preliminary design of the

complete servicing strategy should be completed to verify infrastructure sizing and inverts and to

confirm capital costs. Detailed designs can then proceed on a segmented basis as required to support

development.

A preliminary capital cost estimate was developed for the conceptual sanitary servicing plan. Costs

attributable to growth in the EPB area were added to the capital costs attributable to growth for the

remainder of Sechelt as established in the District of Sechelt DCC Background Report. This combined

capital cost was used as the basis to identify the preliminary district-wide DCC rates that include

servicing of the EPB area.

The addition of the costs attributable to growth in the EPB area to the district-wide DCC's result in an

approximate increase to the sanitary DCC's of 40 percent.

If the District intends to proceed with funding the EPB sanitary sewer expansion under DCC's, the DCC

Background Report and Draft DCC Bylaw should be updated to including the capital costs attributable to

development in EPB area to establish the final sanitary sewer DCC rate.

7 Closure

The conclusions and recommendations presented in this report are based on the reference information

provided by the District and the assumptions outlined above. We trust the above conceptual servicing

strategy meets the current requirements of the District and establishes a baseline for future studies.

Sincerely,

Enclosures: Figures 1 to 3

Appendix A: Flow Calculations

Appendix B: Cost Estimates

of 7

~ J, c:

~ i c: ,__

"' ~ ;;; ~ € /

~ Q_ X w ,__ z w :;' C' 4 0

! >-;:; w w

~ :;' ,__ w ~ ,__ w I 0 w w m ~

" € /

Legend:

0 Industrial 1

~ Industrial 3

0 Industrial 6

0 Industrial 7

~ Marine 1

~ Park, Recreation & Assembly 1

~ Residential 1

~ Residential 3

~ Residential 4

0 100 300m

1 6500

PARSONS

2000 PVC SANITARY SEWER (FOR FUTURE CONNECTION)

RR-2

R-3

RR-2

DUSTY ROAD WASTEWATER TREATMENT PLANT

Sechelt DISTRICT OF SECHEL T Naturally Spirited

East Porpoise Bay Sewer Expansion Study

Existing Land Use EB3759 November 2014 Figure 1

0~----------------------------------------------------------------------------------------------------~

0

i': u J, c:

~ i c: ,__

"' ~ ;;; ~ € /

~ Q_ X w ,__ z w :;' C' 4 0

! >-;:; w w

~ :;' ,__ w ~ ,__ w I 0 w w m ~

" € /

Legend:

~ Commercial 2

[§] Commercial 3

0 Industrial 1

0 Industrial 3

0 Industrial 6

~ Marine 1

~ Multifamily/Mixed Residenti

B Public Assembly

0 Low Density Residential

~ Rural Residential

East Pporpoise Bay -··- Sanitary Service Area

0 100 300m

1 6500

PARSONS

R

R

ALLEN

1-3



Proposed Land Use EB3759 November 2014 Figure 2

0~----------------------------------------------------------------------------------------------~

0

i': ri J, c:

~ i c: ,__

"' ~ ;;; ~ € /

~ Q_ X w ,__ z w :;' C' 4 0

! >-;:; w w

~ :;' ,__ w ~ ,__ w I 0 w w m ~

" € /

Legend:

------------- Existing Gravity Sewer

- - - - Existing Forcemain

Proposed Gravity Sewer

- - Proposed Forcemain

@ Proposed Pump Station

- - - - - - - Proposed Road Right-of Way

- • • - Pump Station 1 Catchment Area



@ Sanitary Node Number

0 100 300m

1 6500

PARSONS



Proposed Sanitary Sewer Network EB3759 November 2014 Figure 3

0~--------------------------------------------------------------------------------------------------------------------~

SANITARY SEWER DESIGN SHEET Sechelt District - East Porpoise Bay Sewer Expansion Study

Formulas

Q(d)=Q(p)+Q(c)+Q(l) (L/s) Average Design Flow Rates Peaking Factors Capacity

Q(p)=PQM/86.4 (L/s) Q(d)=Peak Design Flow Residential Harmon Formula

Q(p)=Peak Population Flow (L/s) Residential 410 lpcd Commercial/Industrial Harmon Formula Hotel 100 units

Q(c)= commercial flow Commercial Hospitality 366 l/day/unit Equivalent Pop. Campsite 50 sites

Q= average daily flow per capita (L) Recreational 365 l/day/site Residential Densities

Q(I)=peak extraneous flow Industrial 40 employees/hectarre type density

68 l/employee/day

Q(I)=IA (L/s) 2720 l/ha/day Unit 2.25 people/lot

A=area in ha Extraneous Residential Density 8.00 units/ha

I=unit of peak extraneous flow (L/s/ha) Inflow and infiltration 0.05 l/s/ha

M=1+(14/4+P^0.5) (Harmon formula)

P=population in thousands n= 0.013

M=peak factor

DESIGN FLOW

Street From To AREA LOTS LOTS PPL ADWF AREA AREA ADWF AREA AREA ADWF AREA AREA ADWF ADWF POP EQ. PEAK PDWF AREA AREA I & I PWWF Type of Diameter Slope Length Capacity Velocity Capacity Velocity

num accum accum accum. accum. accum. FACTOR accum. Pipe mm >0.6m/sha ea ea ea L/s ha ha L/s ha ha L/s ha ha L/s L/s ea M L/s ha ha L/s L/s nom. act. % m L/s m/s

Marmot Road #1 S0 S1 0.6 5 5 11 0.05 0.05 10.80 4.41 0.23 0.60 0.60 0.03 0.26 PVC 200 203 7.00 77 90.3 2.79 OK OK

S2 S1 1.2 10 10 22 0.10 0.10 21.60 4.38 0.45 1.20 1.20 0.06 0.51 PVC 200 203 12.00 36 118.2 3.65 OK OK

S1 S3 (PS #1) 2.41 22 36 82 0.39 0.39 81.90 4.27 1.66 2.41 4.21 0.21 1.87 PVC 200 203 2.30 217 51.8 1.60 OK OK

Marmot Rd #2 S4 S5 4.58 37 73 164 0.78 0.78 164.34 4.18 3.26 4.58 8.79 0.44 3.70 PVC 200 203 2.90 394 58.1 1.80 OK OK

New Rd S6 S5 2.08 17 17 37 0.18 0.18 37.44 4.34 0.77 2.08 2.08 0.10 0.87 PVC 200 203 3.00 103 59.1 1.83 OK OK

Shoreline #1 S5 S7 0 0 90 202 0.96 0.96 201.78 4.15 3.97 0.00 10.87 0.54 4.51 PVC 200 203 3.80 51 66.5 2.06 OK OKS7 PS#2 2.38 19 109 245 1.16 1.16 244.62 4.11 4.78 2.38 13.25 0.66 5.44 PVC 200 203 0.80 400 30.5 0.94 OK OK

Burnett Rd S8 S9 28 224 224 504 2.39 0.00 0.00 0.00 2.39 504.00 3.97 9.50 28.00 28.00 1.40 10.90 PVC 200 203 8.30 360 98.3 3.04 OK OK

Sechelt Inlet Rd S9 S11 0 0 224 504 2.39 0.00 0.00 0.00 2.39 504.00 3.97 9.50 0.00 28.00 1.40 10.90 PVC 200 203 1.40 400 40.4 1.25 OK OK

Yew Rd S10 S11 15.64 125 125 282 1.34 4.42 4.42 0.14 1.48 310.84 4.07 6.01 20.06 20.06 1.00 7.01 PVC 200 203 1.30 512 38.9 1.20 OK OK

Sechelt Inlet Rd S12 S11 2.71 22 22 49 0.23 0.00 0.00 0.00 0.23 48.78 4.32 1.00 2.71 2.71 0.14 1.13 PVC 200 203 4.10 379 69.1 2.14 OK OK

Yew Rd S11 PS#2 3.73 30 401 901 4.28 0.00 4.42 0.14 4.42 930.76 3.82 16.87 3.73 54.50 2.73 19.60 PVC 200 203 3.30 110 62.0 1.92 OK OK

New Rd S13 S14 1.38 11 11 25 0.12 0.12 24.84 4.37 0.51 1.38 1.38 0.07 0.58 PVC 200 203 5.20 299 77.8 2.40 OK OK

Shoreline #2 S14 PS#2 4.23 34 45 101 0.48 0.48 100.98 4.24 2.03 4.23 4.23 0.21 2.24 PVC 200 203 1.50 438 41.8 1.29 OK OK

PS#2 Combined Flows All PS#2 68.94 554 1247 5.92 4.42 4.42 0.14 6.06 1276.36 3.73 22.59 73.36 73.36 3.67 26.25 PVC 200 203 2.20 127 50.6 1.56 OK OK

Allen Rd S15 S16 9.39 75 75 169 0.80 1.71 1.71 0.05 0.86 180.36 4.16 3.56 11.10 11.10 0.56 4.12 PVC 200 203 6.10 534 84.3 2.60 OK OK

Sechelt Inlet Rd S16 S17 2.78 22 97 219 1.04 0.00 1.71 0.05 1.09 230.40 4.12 4.51 2.78 13.88 0.69 5.20 PVC 200 203 2.20 127 50.6 1.56 OK OK

Dusty Rd S18 S19 0 0 0 0 0.00 4.05 4.05 0.14 14.55 14.55 0.46 0.60 126.20 4.21 2.52 18.60 18.60 0.93 3.45 PVC 200 203 5.50 380 80.0 2.47 OK OK

Sechelt Inlet Rd S17 S19 0 0 97 219 1.04 2.89 2.89 0.42 2.03 6.08 0.21 7.30 23.56 0.74 2.42 509.14 3.97 9.59 12.22 44.70 2.24 11.83 PVC 200 203 2.50 392 54.0 1.67 OK OK

S20 S19 0 0 0 0 0.00 6.80 6.80 0.21 0.21 45.11 4.32 0.93 6.80 6.80 0.34 1.27 PVC 200 203 1.70 316 44.5 1.37 OK OK

S19 PS#3 0 0 97 219 1.04 0.00 2.89 0.42 0.00 6.08 0.21 0.00 30.36 0.96 2.63 554.25 3.95 10.39 0.00 51.50 2.58 12.97 PVC 200 203 3.50 143 63.8 1.97 OK OK

Onni PS#3 5 116 116 261 1.24 1.24 261.00 4.10 5.08 5.00 5.00 0.25 5.33 PVC 200 203 1.70 316 44.5 1.37 OK OK

PS#3 Combined Flows All PS#2 17.17 0 213 480 2.28 2.89 2.89 0.42 6.08 6.08 0.21 30.36 30.36 0.96 3.87 815.25 3.86 14.92 56.50 56.50 2.83 17.74 PVC 200 203 2.20 127 50.6 1.56 OK OK

SUMMARIES

PS#1 PS#2 4.21 36 82 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.39 81.90 4.27 1.66 2.41 4.21 0.21 1.87

PS#2 FM 68.94 0 554 1247 5.92 0.00 0.00 0.00 0.00 0.00 0.00 4.42 4.42 0.14 6.06 1276.36 3.73 22.59 73.36 73.36 3.67 26.25

PS#3 FM 17.17 0 213 480 2.28 2.89 2.89 0.42 6.08 6.08 0.21 30.36 30.36 0.96 3.87 815.25 3.86 14.92 56.50 56.50 2.83 17.74

All WWTP 86.11 0 767.60 1727 8.20 2.89 2.89 0.42 6.08 6.08 0.21 34.78 34.78 1.09 9.93 2091.62 3.57 35.44 129.86 129.86 6.49 41.93

3623 cu.m

REMARKSCOMMERCIAL HOSPITALITY FLOWRESIDENTIAL FLOW RECREATIONAL FLOW INDUSTRIAL FLOW EXTRANEOUS FLOWS SEWER DATACOMBINED FLOWS

EAST PORPOISE BAY SANITARY SEWER EXPANSION STUDY 19-Nov-14

PROPOSED SANITARY NETWORK ESTIMATED COSTS

Street Location InfrastructureLength

(m)Ground Surface

Construction Cost

Contingency (30%)

Engineering (12.5%)

Project CostDCC

PortionDCC Cost

Grant Funding

Assist Factor

Net DCC Recovery

NORTH PART OF STUDY AREA (PUMP STATION #1 CATCHMENT)

GRAVITY SEWERSMarmot Road Heron to Pump Station #1 Sanitary Sewer 330 Paved 165,000$ 49,500$ 20,625$ 235,125$ 28% 65,313$ 25% 1% 48,331$

Subtotal (Gravity Sewers) 235,125$ 65,313$ 48,331$

PUMP STATION #1 AND FORCEMAINMarmot Road PS#1 to Heron Forcemain 330 Paved 115,500$ 34,650$ 14,438$ 164,588$ 28% 45,719$ 25% 1% 33,832$

Marmot Road West end Pump Station #1 - - 300,000$ 90,000$ 37,500$ 427,500$ 28% 118,750$ 25% 1% 87,875$

Subtotal (Pump Station #1 and Forcemain) 592,088$ 164,469$ 121,707$

TOTAL (PUMP STATION #1 CATCHMENT AREA) 170,038$

CENTRAL PART OF STUDY AREA (PUMP STATION #2 CATCHMENT)

NORTH SUBCATCHMENT GRAVITY SEWERSMarmot Rd Heron to Burnett Gravity Sewer 395 Paved 197,500$ 59,250$ 24,688$ 281,438$ 100% 281,438$ 25% 1% 208,264$

Burnett Road Sechelt Inlet Rd to Shoreline Gravity Sewer 155 Paved 77,500$ 23,250$ 9,688$ 110,438$ 100% 110,438$ 25% 1% 81,724$

Shoreline Burnett Road to PS#2 Gravity Sewer 400 Natural 150,000$ 45,000$ 18,750$ 213,750$ 100% 213,750$ 25% 1% 158,175$


CENTRAL SUBCATCHMENT GRAVITY SEWERSBurnett Rd East End to Sechelt Inlet Rd Gravity Sewer 360 Gravel 153,000$ 45,900$ 19,125$ 218,025$ 100% 218,025$ 25% 1% 161,339$

Sechelt Inlet Rd Burnett to Yew Gravity Sewer 400 Paved 200,000$ 60,000$ 25,000$ 285,000$ 100% 285,000$ 25% 1% 210,900$

Yew Rd East End to Sechelt Inet Road Gravity Sewer 510 Paved 255,000$ 76,500$ 31,875$ 363,375$ 100% 363,375$ 25% 1% 268,898$

Sechelt Inlet Rd Allen to Yew Gravity Sewer 380 Paved 190,000$ 57,000$ 23,750$ 270,750$ 100% 270,750$ 25% 1% 200,355$

Yew Rd Sechelt Inlet Rd to PS#2 Gravity Sewer 110 Paved 55,000$ 16,500$ 6,875$ 78,375$ 100% 78,375$ 25% 1% 57,998$

Subtotal (Gravity Sewers) 1,215,525$ 1,215,525$ 899,489$

SOUTH SUBCATCHMENT GRAVITY SEWERSAllen Rd Sechelt Inlet Rd to Shoreline Gravity Sewer 181 Paved 90,500$ 27,150$ 11,313$ 128,963$ 100% 128,963$ 25% 1% 95,432$

Shoreline Allen Road to PS#2 Gravity Sewer 438 Natural 164,250$ 49,275$ 20,531$ 234,056$ 100% 234,056$ 25% 1% 173,202$


PUMP STATION #2 AND FORCEMAINSYew Rd PS#2 to Dusty/Sechelt Inlet Forcemain 800 Paved 280,000$ 84,000$ 35,000$ 399,000$ 100% 399,000$ 25% 1% 295,260$

Yew Rd At shoreline Pump Station #2 - - 400,000$ 120,000$ 50,000$ 570,000$ 100% 570,000$ 25% 1% 421,800$

Subtotal (Pump Station #2 and Forcemain) 969,000$ 969,000$ 717,060$

TOTAL(PUMP STATION #2 CATCHMENT AREA) 2,333,345$

SOUTH PART OF STUDY AREA (PUMP STATION #3 CATCHMENT)

GRAVITY SEWERSAllen Rd East End to Sechelt Inlet Gravity Sewer 534 Gravel 226,950$ 68,085$ 28,369$ 323,404$ 100% 323,404$ 25% 1% 239,319$

Sechelt Inlet Rd Allen to Dusty Gravity Sewer 127 Paved 63,500$ 19,050$ 7,938$ 90,488$ 100% 90,488$ 25% 1% 66,961$

Dusty Rd East End to Sechelt Inlet Gravity Sewer 380 Paved 190,000$ 57,000$ 23,750$ 270,750$ 100% 270,750$ 25% 1% 200,355$

Sechelt Inlet Rd Dusty to PS#3 access road Gravity Sewer 392 Paved 196,000$ 58,800$ 24,500$ 279,300$ 100% 279,300$ 25% 1% 206,682$

Sechelt Inlet Rd Delta to PS#3 access road Gravity Sewer 316 Paved 158,000$ 47,400$ 19,750$ 225,150$ 100% 225,150$ 25% 1% 166,611$

PS#3 Access Rd Sechelt Inlet to PS#3 Gravity Sewer 143 Paved 71,500$ 21,450$ 8,938$ 101,888$ 100% 101,888$ 25% 1% 75,397$

Subtotal (Gravity Sewers) 1,290,979$ 1,290,979$ 955,324$

Pump Station #3 and ForcemainPS access road PS#2 to Dusty/Sechelt Inlet Forcemain 115 Paved 40,250$ 12,075$ 5,031$ 57,356$ 0% -$ -$

PS access road At shoreline Pump Station #3 - - 450,000$ 135,000$ 56,250$ 641,250$ 0% -$ -$

Subtotal (Pump Station #3 and Forcemain) 698,606$ -$ -$

TOTAL (PUMP STATION #3 CATCHMENT AREA) 955,324$

TOTAL EAST PORPOISE BAY AREA

5,969,966$ 4,673,929$ 3,458,707$

Estimated Unit CostsUnit Cost Unit Notes

Gravity Sewers Under Paved Surface 500$ per metre 1 - Paved ground surface: Pipes in paved areas are assumed to be installed per MMCD G4 - Paved with 100mm asphaltGravity Sewers Under Gravel Surface 425$ per metre 2 - Gravel ground surface: Pipes under gravel roads are assumed to be installed per MMCD G4 - Paved, but without asphalt.Gravity Sewers Under Natural Surface 375$ per metre 3 - Natural ground surface: Pipe in natural areas are assumed to be installed per MMCD G4 - Boulevards and EasementsForcemains Under Paved Surface 350$ per metre

2015-12-09 epb dcc final report document...dec 09, 2015 · ps#2 catchment, the pump station,...

Documents