Delaware-Rondout Bypass tunnel

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Rondout-West Branch Bypass Tunnel Construction &

Wawarsing Repairs - Contract BT-2

Tunnel Contractor Request for Qualifications

May 30, 2014


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2

Agenda

DEP Agency Chief Contracting Officer (ACCO)

Procurement Schedule

Organization of Bidders

Vendex

Financial and Contract Capability

QA/QC

References

Question procedures

Environmental Health and Safety (EHS)

Qualifications


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Agenda

Bureau of Design and Construction (BEDC)

Overview of the BT-2 Contract - Rondout-West Branch Tunnel and

Wawarsing Repair


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Delaware water is conveyed 45

miles via the RondoutWestBranch Tunnel (RWBT), 13.5 in

diameter, 3002300 in depth.

RWBT in service since 1944 with

a capacity of 900 mgd and an

average annual conveyance of

600 mgd.

RWBT supplies two upstatemunicipalitiesNewburgh and

Marlborough

Tunnel Location

4


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Leaks

Areas of Leakage

RWBT currently

leaking between

15 and 35 mgd


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Wawarsing

Roseton

EL

840

RondoutReservoir

RondoutCreek

ShawangunkMoun

tains

WalkillRiver

HudsonRiver

Shaft 6 TunnelUnwatering Shaft

Shaft

8

West BranchReservoir

El 503

El -600.0

6

6

Repair of the Leaks

Shaft1

Shaft2

Shaft3

Shaft4

Shaft2A

Shaft5

Shaft5A

Shaft7 S

haft9

Wawarsing Repairs:

Possible from within tunnel

Access via Shaft 2A

Traditional repair works

Roseton Repairs

No guarantee of repair from within

tunnel, low point in tunnel

Access shafts too distant

Best Solution is Bypass


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BT-1 Scope

BT-1 Scope

Two shafts:

5B and 6B

Lining only


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BT-1 Shafts


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BT-2 Scope

BT-2 Scope

Bypass tunnel from 5B

site to the Shaft 6B site

including the connection

to the RWBT

Completion of shafts

and construction of the

access chambers

Wawarsing Repairs

Tunnel Inspection

Valve replacements


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Roseton Bypass


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Roseton Bypass


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Roseton Bypass


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Roseton Bypass


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Roseton Bypass


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BT-2 Scope

Bypass Tunnel

Final internal tunnel diameter

= 14 feet

9,200 feet of interliner

Length 13,500 feet total

12,800 feet between shafts

Tunnel excavation may be

drill and blast or tunnelboring machine

Numerous Environmental

Impact Statement (EIS)

commitments


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BT-2 Scope

Tunnel excavation may be drill and blast or tunnel

boring machine Bidders must be qualified for the tunneling

technique on the bid

Only one technique can be bid

Each excavation technique has risks, amongst them

are:

TBM: high groundwater flows and pressures, voids, high

strength rock

Drill and Blast: Initial ground support, water control, final

liner installation, must mine from west to east only


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BT-2 Scope Main Tunnel Lining


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BT-2 Scope Main Tunnel Lining

B W C i


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Final West Intersection and Shaft 5B

Bypass West Connection

BT 2 S C ti T l


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BT-2 Scope Connection Tunnel

BT 2 S C ti T l


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BT 2 S C ti T l


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BT 2 S C ti T l


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B D i T l


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Bypass Drainage Tunnel

Shaft 6B


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Shaft 6B

Th D i T l S h ti


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The Drainage Tunnel Schematic

BT 2 Scope


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BT-2 Scope

5B Shaft

BT 2 Scope: 5B Access Chamber


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BT-2 Scope: 5B Access Chamber

BT 2 Scope


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BT-2 Scope

5B Shaftconstruction piping

BT 2 Scope


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BT-2 Scope

6B Shaft

BT 2 Scope: 6B Access Chamber


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BT-2 Scope: 6B Access Chamber

BT 2 Scope


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BT-2 Scope

Construction Sequence

Pre-connection: Complete Bypass

Tunnel/Shafts/Access Chambers

Connection:

Connect Bypass tunnel

Wawarsing Repairs

Tunnel Inspection

Operate Siphons

Valve Replacements

BT 2 Scope


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BT-2 Scope

Wawarsing Repair

Grout program

Ventilation and access

Contact grouting

Consolidation grouting

BT-2 will have a tool box of repairs

BT 2 Schedule


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BT-2 Schedule

BT-2 Schedule

Bid period: Sept 2014 to Nov 2014

NTPApril 2015

Start tunnel construction at 5BApril 2016 Tunnel and Shafts CompletionSept 2021

Connection period startOct 2021

BT 2 Construction Schedule


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BT-2 Construction Schedule

2013 2014 2015 2016 2017 2018 2019 2020 2021

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Q1

Q2

Q3

Q4

Shaft 5B

Shaft 6B

BT-1

TBM

Procure

ment

Construct Tunnel from 5B

Shaft 5B

Start Connection

BT-2



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Delaware-Rondout Bypass tunnel