Draft Report for Presentation: Removal of Elwha and Glines Canyon Dams, Elwha River Ecosystem and Fisheries Restoration Project

52 Pages·2003·3 MB·English

by  U.S. Bureau of Reclamation

Value
Engineering
Draft Report for Presentation
(Not for Distribution)
Removal of Elwha and Glines Canyon Dams, Elwha River
Ecosystem and Fisheries Restoration Project
(A1R-1751-3408-NPS-20-0-0-1; ELWCD and A1R-1751-3408-NPS-21-0-0-1; GLINS)
2003
April 25,
Conducted in Cooperation with the National Park Service, Olympic National Park and the Bureau
of Reclamation, Pacific Northwest Region
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Bureau of Reclamation, Technical Service Center, Denver, Colorado

Executive Summary 1
Value Study Team Members 2
Acknowledgment of Design Team and Consultant Assistance 3
Value Method Process 3
Current Description 4
Figure 1 . Location Map 6
Figure 2. Elwha Dam Site Plan 7
Figure 3. Elwha Dam Cross Section 8
Figure 4. Glines Canyon Dam Site Plan 9
Figure 5. Glines Canyon Dam Cross Section 10
Owner, Users, and Stakeholders List 11
Function Analysis 12
Function Analysis System Technique (FAST) 12
Cost Model and Estimate Information 14
Proposal No. 1. Refine/Clarify Conditions/Criteria for Negotiated Contract 15
Proposal No. 2. Establish streamflow diversion through gravity section of Elwha Dam 17
Figure 6. Schedule, sheet 1 of 2 21
Figure 7. Schedule, sheet 2 of 2 22
Figure 8. Right Diversion Channel 23
Figure 9. Left Diversion Channel 24
Proposal No. 3. Landscape Contouring of Left Side Intake, Penstock and Power House Area 25
. .
Figure 10. Slope Contours, left side Elwha Dam 27
Proposal No. 4. Draw Down Lake Mills Prior to Dam Removal Using Existing Facilities. ... 28
Draft Report for Presentation - Not for Distribution
Proposal No. 5. Draw Down Lake Mills Prior to Dam Removal Using Newly-Constructed Low-
Level Outlet 30
Figure 1 1 . Gate 32
Figure 12. Opening 33
Disposition of Ideas 34
List of Consultants 37
Data and Documents Consulted 37
Design Team Presentation Attendance List 38
APPENDIX 42
Draft Report for Presentation - Not for Distribution
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The Value Study Team met on April 21 2003, for a 4 1/2-day study ofthe proposed removal of
,
Elwha and Glines Canyon Dams, in and adjacent to Olympic National Park. The dams are to be
removed in support of restoration ofthe Elwha River ecosystem. The estimated field cost ofthe
baseline concept to remove the dams is $25,000,000. The Team developed 5 proposals which
are summarized below. If all the savings proposals are accepted, their maximum savings potential
is $4,640,000. Note that in calculating the maximum potential savings, the implementation costs
for Proposal 2 ($30,000) and the costs of the study ($30,000) were deducted only once.
Proposals 1, 2, and 3 are independent of all other proposals and could be accepted or rejected
individually without affecting other proposals. All proposals can be combined in any combination
except Proposals Nos. 4 and 5 which are mutually exclusive of each other.
Proposal No. 1 . Refine/Clarify Conditions/Criteria for Negotiated Contract. The estimated
savings of this proposal were not determined.
Proposal No. 2 Establish streamflow diversion through gravity section of Elwha Dam. The
.
estimated savings of this proposal are $1,400,000 before deducting any study and/or
implementation costs.
Proposal No. 3 Elwha Dam Landscape Contouring of Left Side Intake, Penstock and
.
Powerhouse Area. The estimated savings of this proposal are $300,000 before deducting any
study and/or implementation costs.
Proposal No. 4 Draw Down Lake Mills Prior to Dam Removal Using Existing Facilities. The
.
estimated savings of this proposal are $1,100,000 before deducting any study and/or
implementation costs.
Proposal No. 5 Draw Down Lake Mills Prior to Dam Removal Using Newly-Constructed Low-
.
Level Outlet. The estimated savings of this proposal are $3,000,000 before deducting any study
and/or implementation costs.
Other Ideas: The Team identified 40 additional ideas that are listed in the "Disposition of Ideas"
table near the end of this report.
Draft Report for Presentation - Not for Distribution
Name/Title/Discipline Address/Phone Number
Norm Hyndman Bureau of Reclamation, Technical Service Center
Value Study Team Leader PO Box 25007 (D-8170), Denver CO 80225-0007
General Engineer Phone: [phone] FAX: [phone]
E-mail: [email protected]
Brian Winter National Park Service, Elwha Restoration Project Office
WA
Elwha Project Manager 826 E. Front Street, Suite A, Port Angeles, 98362-3613
Phone: [phone] FAX: [phone]
E-mail: [email protected]
Bill Jackson National Park Service, Water Resources Division
Chief, Water Operations Branch 1201 Oak Ridge Drive, Suite 250, Fort Collins, CO 80525
Phone: [phone] FAX: [phone]
E-mail: [email protected]
G&G
Dennis Gathard Associates, River Restoration Specialist
WA
Principal 4003 1st Avenue, NW, Seattle, 98107
Phone: [phone] F£X: 206-547-4052
E-mail: [email protected]
Wayne Edwards HDR Engineering, Inc., 350 Frank H Ogawa Plaza,
Vice President Suite 200, Oakland, CA 94612-2049
Phone: [phone] FAX: [phone]
E-mail: [email protected]
Dan Drake Bureau of Reclamation, Technical Service Center
PO Box 25007 (D-8420), Denver CO 80225-0007
Phone: [phone] FAX: [phone]
E-mail: [email protected]
Carlton Smith Bureau of Reclamation, Technical Service Center
PO Box 25007 (D-8160), Denver CO 80225-0007
Phone: [phone] FAX: [phone]
E-mail: [email protected]
John Billingsley Bureau of Reclamation, Pacific N.W. Construction Office
WA
Civil Engineer 3701 River Rd (NCO-3122), P.O. Box 2967, Yakima,
98907
Phone: [phone] FAX: [phone]
E-mail: [email protected]
Dan Maag Bureau of Reclamation, Technical Service Center
Senior Cost Estimator PO Box 25007 (D-8170), Denver CO 80225-0007
part time team member Phone: [phone] FAX: [phone]
E-mail: [email protected]
Draft Report for Presentation - Not for Distribution
Acknowledgme
*sign
The Value Study Team wishes to express their thanks and appreciation to the Design Team
Leader, Mr. Tom Hepler, and the members of the design team, who fully and cordially provided
all requested information and consultation on the conceptual design. The team would not have
been as successful without the design team's cooperation and assistance.
The Value Study Team wishes also to express thanks and appreciation to those listed on the
Consultation Record ofthis report. Their cooperation and help contributed significantly to the
technical foundation and scope of the team's investigation and final proposals.
The goal of the value method is to achieve the most appropriate and highest value solution for
the project. It is only through the effort of a diverse, high performing team, including all those
involved, that this goal can be achieved. This study is the product of such an effort.
The Value Method is a decision making process, originally developed in 1943 by Larry Miles, to
creatively develop alternatives that satisfy essential functions at the highest value. It has many
applications but is most often used as a management or problem-solving tool.
The study process follows a Job Plan that provides a reliable, structured approach to the
conclusion. Initially, the team examined the component features ofthe program, project or
activity to define the critical functions (performed or desired), governing criteria, and associated
costs. Using creativity (brainstorming) techniques, the team suggested alternative ideas and
solutions to perform those functions, consistent with the identified criteria, at a lower cost or
with an increase in long term value. The ideas were evaluated, analyzed and prioritized, and
the best ideas were developed to a level suitable for comparison, decision making and
adoption.
This report is the result of a "formal" Value Study, by a team comprised of people with the
diversity, expertise, and independence needed to creatively attack the issues. The team
members bring a depth of experience and understanding of the discipline they represent, and
an open and independent enquiry of the issues under study, to creatively solve the problems at
hand. Ideally, the team members have not been notably involved in the issues prior to the
study. The team applied the Value Method to the issues and supporting information, and took
a "fresh look" at the problems to create alternatives that fulfill the client's needs at the greatest
value.
Draft Report for Presentation - Not for Distribution
Elwha and Glines Canyon dams are located on the Elwha River, in or adjacent to Olympic
National Park, Washington. Elwha dam is located north of the Park, at river mile 4.9 (4.9 miles
upstream of the mouth of the River). Glines Canyon Dam is located inside the Park, at river
mile 12.8. See Figure 1. See Figures 2 and 3 for site plans of Elwha and Glines Canyon dams.
The Elwha River Ecosystem and Fisheries Restoration Act, PL 102-495, calls for full
restoration of the ecosystem and native anadromous species in the Elwha River watershed,
including deconstruction ofthe Elwha and Glines Canyon Dams. The National Park Service
(NPS) is the lead agency for the Federal Government for this project. Reclamation is providing
design support through an interagency agreement to the NPS.
The overall project includes removal of Elwha and Glines Canyon dams, construction of a new
M&l river intake structure, an industrial water treatment plant, a new municipal water treatment
plant, flood protection measures, protection for the Dry Creek Water Association, and
implementing revegetation and fish restoration plans.
This study focuses on the removal of the dams. The estimated Field cost for removal of Elwha
Dam is $12,000,000. The estimated field cost for the removal of Glines Canyon Dam is
$13,000,000. These costs exclude costs associated with decommissioning the existing
powerplants.
The baseline concept for removing the dams includes lowering the reservoirs using spillways
and penstocks, at a controlled rate to avoid mobilizing landslides and to redistribute reservoir
sediments to minimize leaving over steepened slopes. Sedimentation modeling has been
performed to help minimize adverse impacts of sediment releases. Glines Canyon Dam
removal would be delayed for a few months to provide flood protection until a diversion channel
is completed in the left or north spillway at Elwha Dam. Deconstruction of both dams would
then begin.
The Elwha damsite is a culturally significant site. As part of the mitigation for removal of Elwha
Dam (a National Register Property) the NPS is restoring the cultural landscape in accordance
with consultation processes under the National Historic Preservation Act. The dam and all
associated appurtenances are to be obliterated and/or removed to restore the site to near pre-
dam appearances.
At Glines Canyon, the arch section ofthe dam, transformer yard and transmission lines, outlet
works intake tower, surge tank, the left abutment dike and boathouse will be removed. The
spillway section (on the left abutment), the thrust block (on the right abutment) and right
abutment dike, powerhouse, and penstocks will be retained to reduce removal costs and to
interpret history associated with the dam. The deconstructed elements of the Glines Canyon
Dam will be removed from the Park consistent with the Organic Act.
Draft Report for Presentation - Not for Distribution
?JAs the dams are removed (short-term), some of the entrapped sediments will be released in
high concentration periods, as notches are cut lower and lower in the dams. High concentration
releases will be prohibited at identified periods, "Fish Windows", to protect anadromous
species migrating and or spawning in the lower reaches of the river>/from lethal concentrations
of sediments.
Draft Report for Presentation - Not for Distribution
WASHINGTON
Port Angeles
LEGEND
Elwha River Alluvium
Glacial Deposits (Continental
and Olympic Alpine)
Twin Rivers Gp (Mudstone,
Siltstone, and Sandstone)
Lyre and Aldwell Fms
(Marine Siltstone, Sandstone,
and Comglomerate)
Crescent Fm (Basalt with minor
Diabase and Gabbro)
Cresent Fm (Blue Mountain
Unit) Volcaniclastic Sediments
Olympic Core Complex
(Metasediments)
Scale of Miles
Draft Report for Presentation - Not for Distribution