pipeline costs

8/12/2019 Pipeline Costs

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TECHNICAL MEMORANDUM

To: Ed Filadelfia Date: May 13, 2013From: Paul Tinhpheng

John CiccotelliReference: 1343122/06-7

Through: Ernest Marquez CoR Contract: 0801922c.c: Gary Valladao Document No. TM-016 DRAFTSubject: Hidden Valley-Hole Lake Improvements FEMA Application Project

Alternatives

INTRODUCTION

This memorandum evaluates alternatives to provide recycle water to the Hidden ValleyWetlands and Hole Lake, while considering options to also divert stormwater passingthrough the Hole Lake watercourse to the Hidden Valley Wetlands. The blendedrecycled water (and optional stormwater flow) will provide a permanent supply to theHidden Valley Wetlands. The alternatives consider adding recycle water to the HoleLake Wash to greatly improve water quality in the lower reaches of the wash andenhance habitat areas for the Santa Ana sucker.

2010 STORM EVENT

In 2010, a large storm destroyed a natural channel that conveyed a portion of finaleffluent from the Regional Water Quality Control Plant (RWQCP) and stormwater fromthe Hole Lake Wash to the Hidden Valley Wetlands. This project proposes to reinstatea conveyance method that cannot be destroyed in future flooding events.

The RWQCP and the adjacent Hole Lake wash are currently discharging into the SantaAna River. The flow from Hole Lake now reaches the river through an estuary area thatwas once isolated from the river by the natural channel. The RWQCP had beentraditionally diverting effluent through the wetlands for additional nitrogen removal. Alleffluent from the plant now enters the Santa Ana River.

PROJECT ALTERNATIVES

MWH developed eight project alternatives for conveying recycled water from theRWQCP to Hole Lake Wash and Hidden Valley Wetlands. The piping alignment andnew recycled water pump station location are shown in Figures 1 through 3.

The alternatives are based on different recycled water flows (2 and 10 mgd), pipingsystems (pressurized or gravity fed), and blending options (blending with Hole LakeWash stormwater or no blending). The 10 mgd flow is similar to the flow that waspreviously entering the wetlands. The 2 mgd flow is a preliminary value that is expectedto provide partial restoration of the wetlands.


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Date: May 03, 2013

Existing Junction BoxNo. 16

Connection to CCB 3Discharge

Final Effluent PumpStation Discharge Final Effluent Pump

Station


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FEMA Application Support - Project Alternatives May 13, 2013

TM-016_Hidden Valley-Hole Lake Project Alternatives_20130513 2

MWH studied the alignment of the old hydro-power conveyance channel as a possiblelocation for a gravity or force main. The conveyance channel is severely deteriorated foraround 25 % of its length and substantially deteriorated for around 50% of its length. Insome areas, retaining walls will need to be constructed to provide lateral soil support.Furthermore, the channel is mostly located on a steep embankment and large pipelineswill demand geotechnical investigation to guarantee stability. Lastly, the general terrainis not suited for construction. For these reasons, MWH has abandoned the use of theold hydro-power conveyance channel as a possible pipe alignment.

Parts of the old hydro-power conveyancechannel that remain intact

Deteriorated section of old hydro-powerconveyance channel

Table 1 provides a summary of the project alternatives.

Table 1Project Alternatives

Alternative Blending Option Recycled Water Flow Piping System Total Cost1

No Blending

10 MGD Pressurized $11,300,000

2 2 MGD Pressurized $8,700,0003 2 MGD Gravity Fed $8,900,0004 10 MGD Gravity Fed N/A5

Blending

10 MGD Pressurized $12,900,0006 2 MGD Pressurized $9,200,0007 2 MGD Gravity Fed $9,500,0008 10 MGD Gravity Fed N/A


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ALTERNATIVES 1 - 4

For Alternatives 1 through 4, recycled water blending with stormwater from the HoleLake Wash is not provided. Recycled water is conveyed directly to the Hidden ValleyWetlands with a bleed-off of 2 cfs of recycled water to the Hole Lake Wash.

For these alternatives, it is assumed that the Hole Lake Wash discharge is provideddownstream of the Jurupa Avenue culvert. Alternative 4, which is designed for a 10 mgdgravity fed system, is considered not feasible given that a 62-inch gravity pipe isrequired. A pipe of this size is not considered constructible along the horse trailalignment and a cost estimate is not provided.

The City may seek Santa Ana sucker habitat creation credit with these alternatives.

ALTERNATIVES 5 - 8

For Alternatives 5 through 8, recycled water blending with Hole Lake Wash stormwateris provided.

For these alternatives, it is assumed that the Hole Lake Wash discharge is providedupstream of the Jurupa Avenue culvert where an existing holding pond providesretention time for blending of the recycled water and stormwater. To convey recycledwater upstream of the culvert, a jack-and-bore crossing will be required across JurupaAvenue. Half of the average dry-weather stormwater flow (2 cfs) will be diverted forblending and conveyance to the Hidden Valley Wetlands. An equal amount of recycledwater flow will be bled-off for discharge to the Hole Lake Wash holding pond. Thesealternatives will allow the City to seek Santa Ana sucker habitat creation credit andstormwater treatment credit.

For Alternatives 5 and 6, a pump station at the Hole Lake Wash will convey divertedstormwater to the pressurized pipeline from the RWQCP to the Hidden Valley Wetlands.

For Alternatives 7 and 8, a distribution box will collect diverted stormwater and recycledwater. Blended flow will convey by gravity to the Hidden Valley Wetlands. Alternative 8,which is designed for a 10 mgd gravity fed system, is considered not feasible given thata 70-inch gravity pipe is required. A pipe of this size is not considered constructiblealong the horse trail alignment and a cost estimate is not provided.

A schematic of Alternatives 1 through 4 is provided as Figure 4 and a schematic ofAlternatives 5 through 7 is provided as Figure 5. Details for each project alternative areprovided below.

COST ESTIMATES

Cost estimates are provided for Alternatives 1 through 3 and 5 through 7 based on anAACE International Class 4 Cost Estimate. Details are attachment to this technicalmemorandum. The construction cost estimates also include the rehabilitation work atthe Hidden Valley Wetlands, as previously scoped by the City.


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New Recycled Water Pump

Station

Hole Lake

Hidden Valley W

Hole Lake Wash

Jurupa AveCulvert

Alternative 3Diversion Structure

Figure 4Alternatives 1, 2, & 3

No Stormwater Blending

Recycled Water Only

Recycled Water

Holding Pond


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New Recycled Water Pump

Station

HoLak

Hidden Valley

Alternatives 4 & 5 Pump Station

Hole Lake Wash

Jurupa AveCulvert

Figure 5Alternatives 4, 5, & 6Stormwater Blending

Blended Stormwater &

Recycled Water

Recycled Water

Holding Pond

Alternative 6Diversion Structure


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ALTERNATIVES DESCRIPTION

Alternative 1

Flow to Hidden Valley Wetlands = 10 mgdFlow to Hole Lake Wash = 1.3 mgd (2 cfs)Total Flow = 11.3 mgd

Pipe System to Hidden Valley Wetlands = PressurizedBlending with Hole Lake Wash stormwater = No

Construction Cost = $ 8,700,000Design & Bid Services Cost (15%) = $ 1,300,000City Engineering & Operating Cost (15%) = $ 1,300,000Total Cost = $11,300,000

Project Description: 11 MGD vertical turbine pump station (3 pumps) at the WQCP

o TDH = 80 fto Power = 200 HP

26-inch pressurized pipeline from pump station to Hole Lake Washo 2,000 ft lengtho CML steel pipeo Throttling valve at Hole Lake Washo 5 ft depth

12-inch blowoff and flow meter at Hole Lake Wash 24-inch pressurized pipeline from Hole Lake Wash to Hidden Valley Wetlands

o 7,500 ft lengtho CML steel pipeo 5 ft depth

Alternative 2


Pipe System to Hidden Valley Wetlands = PressurizedBlending with Hole Lake Wash stormwater = No

Construction Cost = $6,700,000Design & Bid Services Cost (15%) = $1,000,000City Engineering & Operating Cost (15%) = $1,000,000Total Cost = $8,700,000


o TDH = 95 ft


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o Power = 60 HP 14-inch pressurized pipeline from pump station to Hole Lake Wash

o 2,000 ft lengtho CML steel pipeo Throttling valve at Hole Lake Washo 5 ft depth

12-inch blowoff and flow meter at Hole Lake Wash 14-inch pressurized pipeline from Hole Lake Wash to Hidden Valley Wetlands

o 7,500 ft lengtho CML steel pipeo 5 ft depth

Alternative 3


Pipe System to Hidden Valley Wetlands = Gravity fedBlending with Hole Lake Wash stormwater = No




14-inch pressurized pipeline from pump station to Hole Lake Washo 2,000 ft lengtho CML steel pipeo 5 ft depth

12-inch blowoff and flow meter at Hole Lake Wash 20-inch gravity pipeline from Hole Lake Wash to Hidden Valley Wetlands

o 7,500 ft lengtho PVC pipeo 5 ft depth

Alternative 4 (considered not feasible)


Pipe System to Hidden Valley Wetlands = Gravity fedBlending with Hole Lake Wash stormwater = No


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o TDH = 56 fto 140 HP



o 7,500 ft lengtho RCP pipeo 5 ft depth

Alternative 5


Pipe System to Hidden Valley Wetlands = PressurizedBlending with Hole Lake Wash stormwater = Yes

Construction Cost = $ 9,900,000Design & Bid Services Cost (15%) = $ 1,500,000City Engineering & Operating Cost (15%) = $ 1,500,000Total Cost = $12,900,000




12-inch blowoff and flow meter at Hole Lake Wash 1.3 MGD submersible pump station (3 pumps) at Hole Lake Wash


26-inch pressurized pipeline from Hole Lake Wash to Hidden Valley Wetlandso 7,500 ft lengtho CML steel pipeo 5 ft depth


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Alternative 6


Pipe System to Hidden Valley Wetlands = PressurizedBlending with Hole Lake Wash stormwater = Yes





12-inch blowoff and flow meter at Hole Lake Wash 1.3 MGD submersible pump station (3 pumps) at Hole Lake Wash


14-inch pressurized pipeline from Hole Lake Wash to Hidden Valley Wetlandso 7,500 ft lengtho CML steel pipeo 5 ft depth

Alternative 7


Pipe System to Hidden Valley Wetlands = Gravity fedBlending with Hole Lake Wash stormwater = Yes




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12-inch blowoff and flow meter at Hole Lake Wash Distribution box at Hole Lake Wash 28-inch gravity pipeline from Hole Lake Wash to Hidden Valley Wetlands

o 7,500 ft lengtho PVC pipeo 5 ft depth

Alternative 8 (considered not feasible)


Pipe System to Hidden Valley Wetlands = Gravity fedBlending with Hole Lake Wash stormwater = Yes


o TDH = 56 fto 150 HP



o 7,500 ft lengtho RCP pipeo 5 ft depth


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MWH JLLWalnut Creek 5/3/2013

City of RiversideFEMA Proposal Support

Hidden Valley Water Conveyance ProjectAlternative #1

Grand Total Price: 8,700,000$Item

# Description Quantity UOM Unit Price Total Price Comments

A. Conveyance to Hidden Valley Wetlands $6,413,7631 11 MDG Vertical Turbine Pump Station 1 lot $ 2, 500 ,0 00 $ 2, 50 0, 00 0 TDP = 80, PS cost curve < 10 MGD, 3 pumps, 200 hp2 26" C200 CML Pressurized Pipeline, 5' cover 2,000 lf $310 $620,000 from PS to Hole Lake. Mostly paved areas3 Jack & Bore at Van Buren Avenue 175 lf $738 $129,063 includes pits4 26" Throttling Valve at Hole Lake Wash 1 ea $31,200 $31,2005 12" Blow off 1 ea $3,000 $3,0006 12" Flowmeter 1 ea $15,000 $15,0007 24" C200 CML Pressurized Pipeline, 5' cover 7,500 lf $310 $2,325,000 at horse trail8 Pipel ine Testing/Commissioning 9,500 lf $5 $47,5009 Piping Tieins/Connects 2 ea $20,000 $40,000

10 Horse Trail Replacement 7,500 lf $10 $75,00011 Pavement Replacement 12,000 sf $4.00 $48,000 at 6' wide for 2000'12 Contractor Mobilization/General Conditions 1 ls 10% $580,000

B. Hidden Valley Wetlands Mitigation $834,0001 Clear ing & Grubbing Channel 3,000 lf $25 $75,000 remove sediments/debris2 36" Dia RCP 1,200 lf $360 $432,000 replace/reroute influent pipe3 Trench Shoring 1,200 lf $10 $12,000 for 36" RCP placement4 Manhole 3 ea $15,000 $45,000 access manholes spaced at 400'5 Pond Influent Piping 1 ls $50,000 $50,000 small dia RCP & PVC distribution piping to ponds6 Distribution Pipe Flush 1 ls $20,000 $20,000 remove impacted silt from remaining influent piping7 Inf luen t Pond Sediment Removal 5,000 cys $20 $100,000 remove sediments from silted in influent pond8 Permitting 1 ls $50,000 $50,000 USACE, DF&G, DF&WS9 Contractor Mobilization/General Conditions 1 ls $50,000 $50,000

Running Subtotal: $7,247,800

Project Administration & Management $1,450,0001 Construction Oversight & Mgt 1 ls 0% $0 Excluded2 Engineering 1 ls 0% $0 3 Geotechnical 1 ls 0% $0 4 Engineering During Construction 1 ls 0% $0 5 Misc Owner's Soft Costs (All) 1 ls 0% $0 Excluded6 Land Acquisition 1 ls 0% $0 ditto

7 Scope Contingency/Market Conditions 1 ls 20% $1,450,000 Scope definition/market allowance/estimating8 Interest During Construction 1 ls 0% $0 Excluded, allowance for financing costs9 Owner's Construction Contingency/Mgt Reserve 1 ls 0% $0 Excluded, allowance for changed field conditions

Grand Total: $8,700,000 Total Estimated Constr Costs w/ Contingency

Cost Range: $5,800,000 $9,400,000 Per AACE cost estimate guidelines

Assumptions:

1) Nonstandard environmental mitigations excluded.2)

Notes

1) This OPCC is classified as a Class 4 cost estimate per AACE guidelines. Stated accuracy range = 20% to + 30%2) Pricing basis = 2nd Qtr 2013, escalation to midpoint of construction is excluded.3) Pricing assumes competitive market conditions at time of tender (+3 bidders/trade).4) Owner soft costs and project management expenses excluded.5) Special Inspections not included.

OPCC Disclaimer

Opinion of Probable Construction CostsCurrency: USD-United States-MAY 2013 Dollar

The client hereby acknowledges that MWH has no control over the costs of labor, materials, competitive bidding environments, unidentified field conditions, financial and/or commodity market conditions, or any other factors likely to affect theOPCC of this project, all of which are and will unavoidably remain in a state of change, especially in light of high market volatility attributable to Acts of God and other market forces or events beyond the control of the parties. As such, Clientrecognizes that this OPCC deliverable is based on normal market conditions, defined by stable resource supply/demand relationships, and does not account for extreme inflationary or deflationary market cycles. Client further acknowledges thatthis OPCC is a "snapshot in time" and that the reliability of this OPCC will degrade over time. Client agrees that MWH cannot and does not make any warranty, promise, guarantee or representation, either express or implied that proposals, bids,project construction costs, or cost of O&M functions will not vary significantly from MWH's good faith Class 2 OPCC

AACE In tern atio nal CL ASS 4 Cos t Esti mate - Class 4 estimates are generally prepared based on limited information and subsequently have fairly wide accuracy ranges. Typically, engineering is 10% to 40% complete. They are typically usedfor project screening, determination of feasibility, concept evaluation, and preliminary budget approval. Virtually all Class 4 estimates use stochastic estimating methods such as cost curves, capacity factors, and other parametric and modelingtechniques. Expected accuracy ranges are from -15% to -30% on the low side and +20% to 50% on the high side, depending on the technological complexity of the project, appropriate reference information, and the inclusion of an appropriatecontingency determination. Ranges could exceed those shown in unusual circumstances. As little as 20 hours or less to perhaps more than 300 hours may be spent preparing the estimate depending on the project and estimating methodology(AACE International Recommended Practices and Standards).

Prepared by MWH Global, Inc. 5/3/2013 Page 1


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MWH JLLWalnut Creek 5/3/2013



Grand Total Price: 6,860,000$Item

# Description Quantity UOM Unit Price Total Price Comments

A. Conveyance to Hidden Valley Wetlands $4,884,3631 3 MDG Vertical Turbine Pump Station 1 lot $ 1, 400 ,0 00 $ 1, 40 0, 00 0 TDP = 59, PS cost curve < 10 MGD, 40 hp2 14" C200 CML Pressurized Pipeline, 5' cover 2,000 lf $360 $720,000 from PS to Hole Lake. Mostly paved areas3 Jack & Bore at Van Buren Avenue 175 lf $738 $129,063 includes pits4 14" Throttling Valve at Hole Lake Wash 1 ea $16,800 $16,8005 12" Blow off 1 ea $3,000 $3,0006 12" Flowmeter 1 ea $15,000 $15,0007 20" C200 CML Pressurized Pipeline, 5' cover 7,500 lf $260 $1,950,000 at horse trail8 Pipel ine Testing/Commissioning 9,500 lf $5 $47,5009 Piping Tieins/Connects 2 ea $20,000 $40,000

10 Horse Trail Replacement 7,500 lf $10 $75,00011 Pavement Replacement 12,000 sf $4.00 $48,000 at 6' wide for 2000'12 Contractor Mobilization/General Conditions 1 ls 10% $440,000

B. Hidden Valley Wetlands Mitigation $834,0001 Clear ing & Grubbing Channel 3,000 lf $25 $75,000 remove sediments/debris2 36" Dia RCP 1,200 lf $360 $432,000 replace/reroute influent pipe3 Trench Shoring 1,200 lf $10 $12,000 for 36" RCP placement4 Manhole 3 ea $15,000 $45,000 access manholes spaced at 400'5 Pond Influent Piping 1 ls $50,000 $50,000 small dia RCP & PVC distribution piping to ponds6 Distribution Pipe Flush 1 ls $20,000 $20,000 remove impacted silt from remaining influent piping7 Inf luen t Pond Sediment Removal 5,000 cys $20 $100,000 remove sediments from silted in influent pond8 Permitting 1 ls $50,000 $50,000 USACE, DF&G, DF&WS9 Contractor Mobilization/General Conditions 1 ls $50,000 $50,000


Project Administration & Management $1,144,0001 Construction Oversight & Mgt 1 ls 0% $0 Excluded2 Engineering 1 ls 0% $0 3 Geotechnical 1 ls 0% $0 4 Engineering During Construction 1 ls 0% $0 5 Misc Owner's Soft Costs (All) 1 ls 0% $0 Excluded6 Land Acquisition 1 ls 0% $0 ditto

7 Scope Contingency/Market Conditions 1 ls 20% $1,144,000 Scope definition/market allowance/estimating8 Interest During Construction 1 ls 0% $0 Excluded, allowance for financing costs9 Owner's Construction Contingency/Mgt Reserve 1 ls 0% $0 Excluded, allowance for changed field conditions



Assumptions:

1) Nonstandard environmental mitigations excluded.2)

Notes

1) This OPCC is classified as a Class 4 cost estimate per AACE guidelines. Stated accuracy range = 20% to + 30%2) Pricing basis = 2nd Qtr 2013, escalation to midpoint of construction is excluded.3) Pricing assumes competitive market conditions at time of tender (+3 bidders/trade).4) Owner soft costs and project management expenses excluded.5) Special Inspections not included.

OPCC Disclaimer


The client hereby acknowledges that MWH has no control over the costs of labor, materials, competitive bidding environments, unidentified field conditions, financial and/or commodity market conditions, or any other factors likely to affect theOPCC of this project, all of which are and will unavoidably remain in a state of change, especially in light of high market volatility attributable to Acts of God and other market forces or events beyond the control of the parties. As such, Clientrecognizes that this OPCC deliverable is based on normal market conditions, defined by stable resource supply/demand relationships, and does not account for extreme inflationary or deflationary market cycles. Client further acknowledges thatthis OPCC is a "snapshot in time" and that the reliability of this OPCC will degrade over time. Client agrees that MWH cannot and does not make any warranty, promise, guarantee or representation, either express or implied that proposals, bids,project construction costs, or cost of O&M functions will not vary significantly from MWH's good faith Class 2 OPCC

AACE In tern atio nal CL ASS 4 Cos t Esti mate - Class 4 estimates are generally prepared based on limited information and subsequently have fairly wide accuracy ranges. Typically, engineering is 10% to 40% complete. They are typically usedfor project screening, determination of feasibility, concept evaluation, and preliminary budget approval. Virtually all Class 4 estimates use stochastic estimating methods such as cost curves, capacity factors, and other parametric and modelingtechniques. Expected accuracy ranges are from -15% to -30% on the low side and +20% to 50% on the high side, depending on the technological complexity of the project, appropriate reference information, and the inclusion of an appropriatecontingency determination. Ranges could exceed those shown in unusual circumstances. As little as 20 hours or less to perhaps more than 300 hours may be spent preparing the estimate depending on the project and estimating methodology(AACE International Recommended Practices and Standards).



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MWH PTArcadia, CA 5/13/2013



Grand Total Price: 9,900,000$

Item # Description Quantity UOM Unit Price Total Price Comments

A. Conveyance to Hidden Valley Wetlands $7,109,3001 11 MGD Vertical Turbine Pump Station 1 lot $3,000,000 $3,000,000 TDP = 90, PS cost curve < 10 MGD, 3 pumps, 250 hp2 24" C200 CML Pressurized Pipeline, 5' cover 2,000 lf $310 $620,000 from PS to Hole Lake. Mostly paved areas3 Jack & Bore at Van Buren Avenue & Jurupa Avenue 350 lf $738 $258,300 includes pits4 26" Throttling Valve at Hole Lake Wash 1 ea $31,200 $31,2005 12" Blow Off 1 ea $3,000 $3,0006 12" Flowmeter 1 ea $15,000 $15,0007 26" C200 CML Pressurized Pipeline, 5' cover 7,500 lf $310 $2,325,000 at horse trail8 Pipeline Testing/Comissioning 9,500 lf $5 $47,5009 Piping Tieins/Connects 2 ea $20,000 $40,000

10 Horse Trail Replacement 7,500 lf $10 $75,00011 Pavement Replacement 12,000 sf $4 $48,000 at 6' wide for 2000'12 Contractor Mobilization/General Conditions 1 ls 10% $646,300

B. Hole Lake Wash Pump Station $315,000

1 1.5 MGD Vertical Turbine Pump Station 1 lot $300,000 $300,0002 10" C200 CML Pressurized Pipeline 100 lf $150 $15,000

C. Hidden Valley Wetlands Mitigation $834,0001 C le ar ing & Grubbing Channel 3,000 lf $25 $75,000 remove sediments/debris2 36" Dia RCP 1,200 lf $360 $432,000 replace/reroute influent pipe3 Trench Shoring 1,200 lf $10 $12,000 for 36" RCP placement4 Manhole 3 ea $15,000 $45,000 access manholes spaced at 400'5 Pond Influent Piping 1 ls $50,000 $50,000 small dia RCP & PVC distribution piping to ponds6 Distribution Pipe Flush 1 ls $20,000 $20,000 remove impacted silt from remaining influent piping7 Influent Pond Sediment Removal 5,000 cys $20 $100,000 remove sediments from silted in influent pond8 Permitting 1 ls $50,000 $50,000 USACE, DF&G, DF&WS9 Contractor Mobilization/General Conditions 1 ls $50,000 $50,000


Project Administration & Management $1,651,6601 Construction Oversight & Mgt 1 ls 0% $0 Excluded2 Engineering 1 ls 0% $0 ditto3 Geotechnical 1 ls 0% $0 ditto4 Engineering During Construction 1 ls 0% $0 ditto5 Misc Owner's Soft Costs (All) 1 ls 0% $0 Excluded

6 Land Acquisition 1 ls 0% $0 ditto7 Scope Contingency/Market Conditions 1 ls 20% $1,651,660 Scope definition/market allowance/estimating8 I nt er es t During Construction (Financing) 1 ls 0% $0 Excluded, allowance for financing costs9 Owner's Construction Contingency/Mgt Reserve 1 ls 0% $0 Excluded, allowance for changed field conditions



Assumptions:1) Non standard environmental mitigations excluded.2)

Notes:

1) This OPCC is classified as a Class 4 cost estimate per AACE guidelines. Stated accuracy range = 20% to +30%2) Pricing basis = 2nd Qtr 2013, escalation to midpoint of construction is excluded.3) Pricing assumes competitive market conditions at time of tender (+3 bidders/trade).

4) Owner soft costs and project management expenses excluded

5) Special inspections not included

OPCC Disclaimer

The client hereby acknowledges that MWH has no control over the costs of labor, materials, competitive bidding environments, unidentified field conditions, financial and/or commodity market conditions, or any other factors likely to affect the OPCC of thisproject, all of which are and will unavoidably remain in a state of change, especially in light of high market volatility attributable to Acts of God and other market forces or events beyond the control of the parties. As such, Client recognizes that this OPCCdeliverable is based on normal market conditions, defined by stable resource supply/demand relationships, and does not account for extreme inflationary or deflationary market cycles. Client further acknowledges that this OPCC is a "snapshot in time" and thatthe reliability of this OPCC will degrade over time. Client agrees that MWH cannot and does not make any warranty, promise, guarantee or representation, either express or implied that proposals, bids, project construction costs, or cost of O&M functions willnot vary significantly from MWH's good faith Class 4 OPCC

AACE In tern ation al CLA SS 4 Cost Esti mate - Class 4 estimates are generally prepared based on limited informati on and subsequently have fairly wide accuracy ranges. Ty pically, engineering is 10% to 40% complete. T hey are typically used for projectscreening, determinati on of feasibility , concept evaluation, and preliminary budget approval. Virtually all Class 4 estimates use stochastic estimating methods such as cost curves, capacity factors, and other parametric and modeling techniques. Expectedaccuracy ranges are from -15% to -30% on the low side and +20% to 50% on the high side, depending on the technological compl exity of the project, appropr iate reference informat ion, and the inclusion of an appropriate contingenc y determination. Rangescould exceed those shown in unusual circumstance s. As little as 20 hours or less to perhaps more than 300 hours may be spent preparing the estimate dependi ng on the project and estimating methodology (AACE Int ernational Recommende d Practices andStandards).




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A. Conveyance to Hidden Valley Wetlands $4,716,8001 2 MGD Vertical Turbine Pump Station 1 lot $1,300,000 $1,300,000 TDP = 110, PS cost curve < 10 MGD, 3 pumps, 90 hp2 12" C200 CML Pressurized Pipeline, 5' cover 2,000 lf $260 $520,000 from PS to Hole Lake. Mostly paved areas3 Jack & Bore at Van Buren Avenue & Jurupa Avenue 350 lf $738 $258,300 includes pits4 12" Throttling Valve at Hole Lake Wash 1 ea $31,200 $31,2005 12" Blow Off 1 ea $3,000 $3,0006 12" Flowmeter 1 ea $15,000 $15,0007 14" C200 CML Pressurized Pipeline, 5' cover 7,500 lf $260 $1,950,000 at horse trail8 Pipeline Testing/Comissioning 9,500 lf $5 $47,5009 Piping Tieins/Connects 2 ea $20,000 $40,000

10 Horse Trail Replacement 7,500 lf $10 $75,00011 Pavement Replacement 12,000 sf $4 $48,000 at 6' wide for 2000'12 Contractor Mobilization/General Conditions 1 ls 10% $428,800

B. Hole Lake Wash Pump Station $315,000

1 1.5 MGD Vertical Turbine Pump Station 1 lot $300,000 $300,0002 10" C200 CML Pressurized Pipeline 100 lf $150 $15,000

C. Hidden Valley Wetlands Mitigation $834,0001 C le ar ing & Grubbing Channel 3,000 lf $25 $75,000 remove sediments/debris2 36" Dia RCP 1,200 lf $360 $432,000 replace/reroute influent pipe3 Trench Shoring 1,200 lf $10 $12,000 for 36" RCP placement4 Manhole 3 ea $15,000 $45,000 access manholes spaced at 400'5 Pond Influent Piping 1 ls $50,000 $50,000 small dia RCP & PVC distribution piping to ponds6 Distribution Pipe Flush 1 ls $20,000 $20,000 remove impacted silt from remaining influent piping7 Influent Pond Sediment Removal 5,000 cys $20 $100,000 remove sediments from silted in influent pond8 Permitting 1 ls $50,000 $50,000 USACE, DF&G, DF&WS9 Contractor Mobilization/General Conditions 1 ls $50,000 $50,000


Project Administration & Management $1,173,1601 Construction Oversight & Mgt 1 ls 0% $0 Excluded2 Engineering 1 ls 0% $0 ditto3 Geotechnical 1 ls 0% $0 ditto4 Engineering During Construction 1 ls 0% $0 ditto5 Misc Owner's Soft Costs (All) 1 ls 0% $0 Excluded

6 Land Acquisition 1 ls 0% $0 ditto7 Scope Contingency/Market Conditions 1 ls 20% $1,173,160 Scope definition/market allowance/estimating8 I nt er es t During Construction (Financing) 1 ls 0% $0 Excluded, allowance for financing costs9 Owner's Construction Contingency/Mgt Reserve 1 ls 0% $0 Excluded, allowance for changed field conditions



Assumptions:1) Non standard environmental mitigations excluded.2)

Notes:




OPCC Disclaimer


The client hereby acknowledges that MWH has no control over the costs of labor, materials, competitive bidding environments, unidentified field conditions, financial and/or commodity market conditions, or any other factors likely to affect the OPCC of thisproject, all of which are and will unavoidably remain in a state of change, especially in light of high market volatility attributable to Acts of God and other market forces or events beyond the control of the parties. As such, Client recognizes that this OPCCdeliverable is based on normal market conditions, defined by stable resource supply/demand relationships, and does not account for extreme inflationary or deflationary market cycles. Client further acknowledges that this OPCC is a "snapshot in time" and thatthe reliability of this OPCC will degrade over time. Client agrees that MWH cannot and does not make any warranty, promise, guarantee or representation, either express or implied that proposals, bids, project construction costs, or cost of O&M functions willnot vary significantly from MWH's good faith Class 4 OPCC

AACE In tern ation al CLA SS 4 Cost Esti mate - Class 4 estimates are generally prepared based on limited informati on and subsequently have fairly wide accuracy ranges. Ty pically, engineering is 10% to 40% complete. T hey are typically used for projectscreening, determinati on of feasibility , concept evaluation, and preliminary budget approval. Virtually all Class 4 estimates use stochastic estimating methods such as cost curves, capacity factors, and other parametric and modeling techniques. Expectedaccuracy ranges are from -15% to -30% on the low side and +20% to 50% on the high side, depending on the technological compl exity of the project, appropr iate reference informat ion, and the inclusion of an appropriate contingenc y determination. Rangescould exceed those shown in unusual circumstance s. As little as 20 hours or less to perhaps more than 300 hours may be spent preparing the estimate dependi ng on the project and estimating methodology (AACE Int ernational Recommende d Practices andStandards).



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A. Conveyance to Hidden Valley Wetlands $5,211,8001 2 MGD Vertical Turbine Pump Station 1 lot $1,200,000 $1,200,000 TDP = 65, PS cost curve < 10 MGD, 3 pumps, 50 hp2 14" C200 CML Pressurized Pipeline, 5' cover 2,000 lf $260 $520,000 from PS to Hole Lake. Mostly paved areas3 Jack & Bore at Van Buren Avenue & Jurupa Avenue 350 lf $738 $258,300 includes pits4 14" Throttling Valve at Hole Lake Wash 1 ea $31,200 $31,2005 12" Blow Off 1 ea $3,000 $3,0006 12" Flowmeter 1 ea $15,000 $15,0007 Distr ibut ion Structure 1 ea $100,000 $100,0008 28" C200 CML Pressurized Pipeline, 5' cover 7,500 lf $320 $2,400,000 at horse trail9 Pipe line Testing/Comissioning 9,500 lf $5 $47,500

10 Piping Tieins/Connects 2 ea $20,000 $40,00011 Hor se Trail Replacement 7,500 lf $10 $75,00012 Pavement Replacement 12,000 sf $4 $48,000 at 6' wide for 2000'13 Contractor Mobilization/General Conditions 1 ls 10% $473,800

B. Hidden Valley Wetlands Mitigation $834,0001 Clea ring & Grubbing Channel 3,000 lf $25 $75,000 remove sediments/debris2 36" Dia RCP 1,200 lf $360 $432,000 replace/reroute influent pipe3 Trench Shoring 1,200 lf $10 $12,000 for 36" RCP placement4 Ma nhole 3 ea $15,000 $45,000 access manholes spaced at 400'5 Pond Influent Piping 1 ls $50,000 $50,000 small dia RCP & PVC distribution piping to ponds6 Distr ibut ion Pipe Flush 1 ls $20,000 $20,000 remove impacted silt from remaining influent piping7 Influent Pond Sediment Removal 5,000 cys $20 $100,000 remove sediments from silted in influent pond8 Permitt ing 1 ls $50,000 $50,000 USACE, DF&G, DF&WS9 Contractor Mobilization/General Conditions 1 ls $50,000 $50,000


Project Administration & Management $1,209,1601 Construction Oversight & Mgt 1 ls 0% $0 Excluded2 Engineering 1 ls 0% $0 ditto3 Geotechnical 1 ls 0% $0 ditto4 Engineering During Construction 1 ls 0% $0 ditto5 Misc Owner's Soft Costs (All) 1 ls 0% $0 Excluded6 Land Acquisition 1 ls 0% $0 ditto7 Scope Contingency/Market Conditions 1 ls 20% $1,209,160 Scope definition/market allowance/estimating8 Interes t During Construction (Financing) 1 ls 0% $0 Excluded, allowance for financing costs9 Own er's Construction Contingency/Mgt Reserve 1 ls 0% $0 Excluded, allowance for changed field conditions



Assumptions:1) Nonstandard environmental mitigations excluded.2)

Notes:




OPCC Disclaimer


The client hereby acknowledges that MWH has no control over the costs of labor, materials, competitive bidding environments, unidentified field conditions, financial and/or commodity market conditions, or any other factors likely to affect the OPCC of thisproject, all of which are and will unavoidably remain in a state of change, especially in light of high market volatility attributable to Acts of God and other market forces or events beyond the control of the parties. As such, Client recognizes that this OPCCdeliverable is based on normal market conditions, defined by stable resource supply/demand relationships, and does not account for extreme inflationary or deflationary market cycles. Client further acknowledges that this OPCC is a "snapshot in time" andthat the reliability of this OPCC will degrade over time. Client agrees that MWH cannot and does not make any warranty, promise, guarantee or representation, either express or implied that proposals, bids, project construction costs, or cost of O&Mfunctions will not vary significantly from MWH's good faith Class 4 OPCC

AACE Int ernat ion al CLA SS 4 Cost Es timat e - Class 4 estimates are generally prepared based on limited information and subsequently have fairly wide accuracy ranges. Typically, engineering is 10% to 40% complete. They are typically used for projectscreening, determination of feasibility, concept evaluation, and preliminary budget approval. Virtually all Class 4 estimates use stochastic estimating methods such as cost curves, capacity factors, and other parametric and modeling techniques. Expectedaccuracy ranges are from -15% to -30% on the low side and +20% to 50% on the high side, depending on the technological complexity of the project, appropriate reference information, and the inclusion of an appropriate contingency determination.Ranges could exceed those shown in unusual circumstances. As little as 20 hours or less to perhaps more than 300 hours may be spent preparing the estimate depending on the project and estimating methodology (AACE International RecommendedPractices and Standards).

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