Delaware-Rondout Bypass tunnel
Transcript of 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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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
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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
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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 Scope Connection Tunnel
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 Scope Connection Tunnel
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
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Shaft 5B
Shaft 6B
BT-1
TBM
Procure
ment
Construct Tunnel from 5B
Shaft 5B
Start Connection
BT-2
BT-2 Construction Schedule
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BT-2 Construction Schedule
THE END
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