Westmoreland Presentation

Greater Boston Solutions Study
High Level Cost Estimate
Presented by:
Electrical Consultants, Inc.
November 18, 2014
Electrical Consultants, Inc.
♦ Full Service Utility Engineering & EPC Firm
♦ History of Firm > 40 Years; Organized as ECI in 1985
♦ ~400 Design Professionals
♦ Large EPC Provider to the Utility & Energy Industry
Electrical Consultants, Inc.
Office Locations
Electrical Consultants, Inc.
Experience and Qualifications
♦ Major utility clients include AEP, MidAmerican Energy,
ATC, FPL & OG&E
♦ Approximately $65M in engineering fees & $50M in EPC
completed work in 2013
♦ Performs engineering design for substation, overhead
transmission, underground transmission, distribution,
environmental, ROW, permitting & studies services for
clients
Electrical Consultants, Inc.
Experience and Qualifications
♦ Carry out construction and EPC contracts through our
subsidiary, EPC Services Company
♦ Service provided to electric utilities, renewable energy,
industrial, municipality, etc.
Experience in System Planning Studies
Mid American Energy
Various Electric Cooperatives
American Transmission Co.
Various Renewable Energy Developers
Madison Gas & Electric
PacifiCorp
City/County of San Francisco PUC
NRG Energy
Chelan County PUD
Bonneville Power Administration
ECI Tasks for ISO New England
ECI to develop “High Level” conceptual cost estimate for
the design, engineer, construct and commissioning of the
10 projects based on project scope information provided by
ISO-NE.
AC Plan
♦ Scobie- Tewksbury 345 kV Line
♦ Reconductor Y-151 kV NU border to Dracut Jct.
♦ Wakefield – Woburn 345 kV UG cable plus 2 reactors
♦ Bifurcate a new Woburn – Mystic 115 kV cable with the
existing cable
AC Plan
HVDC Plan
♦ HVDC submarine cable and two (2) terminals
♦ Seabrook 345 kV Interconnection for HVDC
♦ Mystic 115 kV Interconnection for HVDC
♦ Reconductor Y-151 kV NU border to Dracut Jct.
♦ Reconductor Sandy Pond – Tewksbury 345 kV
♦ Bifurcate Mystic – North Cambridge 345 kV
HVDC Plan
Project Information
ECI performed “High Level” cost estimate based on:
1. “Available” information on project scope.
2. ECI past experiences in similar projects.
3. Industry data search.
Project Information
ECI performed “High Level” cost estimate based on:
4. ECI obtained budgetary quotes from vendors/contractors
where necessary to verify estimates.
5. Project budget did not allow for in-depth site visit or
survey to evaluate physical conditions of each project.
6. ECI recognized cost estimating information provided by
most TO’s was based on conceptual design without
detailed engineering; thus the estimates would be “high
level” and “conceptual” with possible variances once
detailed engineering was completed at a later stage.
Project Information
ECI performed “High Level” cost estimate based on:
7. All Quotes are in 2014 dollars.
8. Items not included in cost estimates:
Common Projects
Easements
Real Estate
Permitting
Environmental Mitigation
Standard Utility Burden
Work Process
1. At the start of the project, there was very limited written
description of each project and breaker diagram. In order
to get an understanding of the routing of each project, ECI
developed route maps of all projects using tools such as
ECI’s data base of utility substation locations, Google
map, etc.
2. ECI also developed local permitting and environmental
information for reference.
3. ECI then developed conceptual idea of how each project
can be constructed.
Work Process
4. “High Level” budgetary material take-off and construction
estimates were performed to put together base case
“True-Up” estimates for each project.
5. Subsequently, some project routing information and
conceptual engineering details were provided by TO’s.
ECI modified its initial cost estimates several times to
reflect the additional available information.
6. Work involved specialized engineering disciplines in
substation, UG & OH transmission, submarine underwater
transmission and environmental & permitting.
AC Plan Cost Estimate
AC Plan
ECI Project #
Description
Scobie – Tewksubry 345 kV Line
Length
(miles)
ECI Base
Cost
25
A-1
$123.2M
Reconductor Y-151 kV NU border to Dracut Jct.
9
A-2
Wakefield – Woburn 345 kV UG cable plus 2
reactors
8
$100.9M
A-3
Bifurcate a new Woburn – Mystic 115 kV cable
with the existing cable
8
$68.8M
Total
$292.9M
AC Plan; Project A-1 Estimate Scope
♦ Tewksbury Upgrade: 345 kV breakers, switches, bus, etc.
♦ Scobie Pond Upgrade: 345 kV breakers, switches, bus,
CCVT, etc.
♦ Scobie-Tewksbury 345 kV Line: Install new 345 kV line,
relocating two 230 kV lines and two 115 kV lines,
relocating one 13.8 kV line over a total of 25 miles.
♦ Y-151 Reconductor from NU Border to Dracut Jct.:
Replace most of the structures, shield wire, hardware,
conductor, etc. for approximately 9.3 miles of 115 kV Y151
AC Plan; Project A-1 Estimate Scope
Total estimated cost for AC Plan Project A-1
$123.2M
AC Plan; Project A-2 Estimate Scope
♦ Woburn Substation:
bus, etc.
Add shunt reactor, GIS breakers,
♦ Wakefield Substation: Add shunt reactor, GIS breakers,
bus, etc.
♦ Install new 345 kV underground line (XLPE) between
Woburn and Wakefield Substations for a total approximate
distance of 7.7 miles
AC Plan; Project A-2 Estimate Scope
Total estimated cost for AC Plan Project A-2
$100.9M
AC Plan; Project A-3 Estimate Scope
♦ Mystic Substation: 115 kV GIS terminations relocation and
associated work for bifurcating two lines
♦ Woburn Substation: Install new 115 kV series reactor and
bifurcating the new 115 kV line terminations with existing
line
♦ Install new 115 kV underground line (HPFF) from Woburn
to Mystic over approximately 7.7 miles
AC Plan; Project A-3 Estimate Scope
Total estimated cost for AC Plan Project A-3
$68.8M
HVDC Plan Cost Estimate
HVDC Plan
ECI Project #
Description
Length
(miles)
ECI Base
Cost
68
$497.9M
D-1
HVDC submarine cable and two (2) terminals
D-2
Seabrook 345 kV Interconnection for HVDC
NA
$28.3M
D-3
Mystic 115 kV Interconnection for HVDC
NA
$25.1M
D-4
Reconductor Y-151 kV NU border to Dracut Jct.
9
$10.5M
D-5
Reconductor Sandy Pond – Tewksbury 345 kV
16
$34.4M
D-6
Bifurcate Mystic – North Cambridge 345 kV
NA
$14.7M
Total
$610.9M
HVDC Plan; Project D-1 Estimate Scope
♦ Install approximately 50.2 miles 200 kV XLPE DC
submarine cables from Seabrook, NH to Everett, MA
♦ Install approximately 15.3 miles 200 kV XLPE DC land
cables from shore landing points to converter stations
♦ Install approximately 0.4 miles of 345 kV XLPE AC land
cables for Seabrook interconnect
HVDC Plan; Project D-1 Estimate Scope
♦ Install approximately 1.3 miles 115 kV XLPE AC land
cables for Everett to Mystic interconnect
♦ Install two AC/DC converter stations, one at each end of
the DC cables
HVDC Plan; Project D-1 Estimate Scope
Total estimated cost for HVDC Plan Project D-1
$497.9M
HVDC Plan; Project D-2 Estimate Scope
♦ Modify existing Seabrook Sub to tie the converter station
to the existing Seabrook Sub. Convert existing breaker
into gas zone, install new breakers, GIS busses, etc.
HVDC Plan; Project D-2 Estimate Scope
Total estimated cost for HVDC Plan Project D-2
$28.3M
HVDC Plan; Project D-3 Estimate Scope
♦ Mystic Substation: UG 115 kV air terminals, relocate 115
kV xfmrs, add new breaker, remove/reinstall breakers,
install new GIS buses, terminate HVDC cables, etc.
♦ Relocate 115 kV underground lines (HPFF) to facilitate
relocation of terminals
HVDC Plan; Project D-3 Estimate Scope
Total estimated cost for HVDC Plan Project D-3
$25.1M
HVDC Plan; Project D-4 Estimate Scope
♦ Y-151 Reconductor from NU Border to Dracut Jct.:
Replace most of the structures, shield wire, hardware,
conductor, etc. for approximately 9.3 miles of 115 kV Y151
HVDC Plan; Project D-4 Estimate Scope
Total estimated cost for HVDC Plan Project D-4
$10.5M
HVDC Plan; Project D-5 Estimate Scope
♦ Temporary substation work to facilitate the reconductor of
Sandy Pond – Tewksbury 345 kV overhead line
♦ Reconductor the 345 kV OH line 337 for approximately
15.7 miles
HVDC Plan; Project D-5 Estimate Scope
Total estimated cost for HVDC Plan Project D-5
$34.4M
HVDC Plan; Project D-6 Estimate Scope
♦ North Cambridge Sub: Remove air insulated bus, install
new gas insulated bus, plus associated work to facilitate
bifurcating of two existing 345 kV underground HPFF lines
♦ Mystic Substation: Remove air insulated bus, install new
gas insulated bus, plus associated work to facilitate
bifurcating of two existing 345 kV underground HPFF lines
♦ North Cambridge and Mystic Substations: Move UG HPFF
line 351 to new termination locations near line 358
terminations to allow for bifurcating the two lines
HVDC Plan; Project D-6 Estimate Scope
Total estimated cost for HVDC Plan Project D-6
$14.7M