GDR - Lowell Creek Diversion Tunnel_65percent 4.pdf
PDF 38 MB Posted
- Attached to
- LOWELL CREEK FLOOD DIVERSION AT SEWARD, ALASKA
- Solicitation number
- W911KB26RA003_ID
About this file
This document is a Liquefaction Analysis Report for the Lowell Creek Diversion Dam and Tunnel project located in Seward, Alaska, prepared by Golder Associates USA Inc. The technical report contains multiple Cone Penetration Test (CPT) analyses using various methodologies (I&B 2008, Robertson 2009, NCEER 1998) to assess soil liquefaction potential at two different test locations (AP-223 and AP-224). The analyses evaluated factors including earthquake magnitude (Mw 7.5), peak ground acceleration (1.30G and 2.30G), ground water table depths, and soil characteristics to determine potential cyclic liquefaction risks across different soil zones.
The accompanying federal contract opportunity is a Special Notice for an Industry Day related to the Lowell Creek Flood Diversion project, solicitation number W911KB26RA003. The U.S. Army Corps of Engineers Alaska District plans an industry engagement on June 24, 2025, to discuss a design-bid-build project involving construction of an inlet diversion structure, an 18ft diameter 2,000ft tunnel, an outlet flume, tunnel refurbishment, and selective tree removal. The contract award is anticipated for Q1 FY27, with the industry day seeking feedback on construction scheduling, site access, traffic control, and labor agreements. Interested contractors must submit participant information by June 17, 2025, to Tammy Davis and Michelle Mandel.
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L I Q U EF A CT I O N A N A L Y S I S R EP OR T
Input parameters and analysis data
Analysis method:
Fines correction method:
Points to test:
Earthquake magnitude Mw:
Peak ground acceleration:
I&B (2008) I&B (2008) Based on Ic value 9.30 1.30
G.W.T. (in-situ):
G.W.T. (earthq.):
Average results interval:
Ic cut-off value:
Unit weight calculation:
Project title : Lowell Creek Diversion Dam and Tunnel U d
Location : Seward, AK
Golder Associates USA Inc.
1400 West Benson Blvd Suite 420 Anchorage, AK 99503
CPT file : AP-223 (CPT-01)
13.00 ft
13.00 ft 2.60 Based on SBT
Use fill:
Fill height:
Fill weight:
Trans. detect. applied:
K applied:
No N/A N/A Yes Yes
Clay like behavior applied:
Limit depth applied:
Limit depth:
MSF method:
Sands only No N/A Method b d
Cone resistance qt (tsf) 4002000
Cone resistance SBTn Plot
DRILL OUT
Ic (Robertson 1990)
SBTn Plot CRR plot
DRILL OUT
CRR & CSR
0.60.40.20
CRR plot
During earthq.
qc1N,cs 200180160140120100806040200
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Liquefaction
No Liquefaction
Normalized friction ratio (%)
0.1 1 10
1,000
Friction Ratio
DRILL OUT
Rf (%) 1086420
Friction Ratio
Mw=71/2, sigma'=1 atm base curve Summary of liquefaction potential
FS Plot
DRILL OUT
Factor of safety 21.510.50
FS Plot
During earthq.
Zone A1: Cyclic liquefaction likely depending on size and duration of cyclic loading Zone A2: Cyclic liquefaction and strength loss likely depending on loading and ground geometry Zone B: Liquefaction and post-earthquake strength loss unlikely, check cyclic softening Zone C: Cyclic liquefaction and strength loss possible depending on soil plasticity, brittleness/sensitivity, strain to peak undrained strength and ground geometry
CLiq v.3.5.2.5 - CPT Liquefaction Assessment Software - Report created on: 2/9/2023, 2:25:16 PM Project file: C:\Users\adaggett\Downloads\lowell CPT.clq
65% Golder Associates USA Inc.Golder Associates USA Inc.Design Golder Associates USA Inc.Golder Associates USA Inc. GDR
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Normalized CPT penetration resistance
Cyclic Stress Ratio*(CSR*)
Thickness of liquefiable sand layer, H2 (m)
Depth (ft)
Analysis method:
Fines correction method:
Points to test:
Earthquake magnitude Mw:
Peak ground acceleration:
I&B (2008) R&W (1998) Based on Ic value 9.30 1.30
G.W.T. (in-situ):
G.W.T. (earthq.):
Average results interval:
Ic cut-off value:
Unit weight calculation:
Project title : Lowell Creek Diversion Dam and Tunnel U d
Location : Seward, AK
Golder Associates USA Inc.
1400 West Benson Blvd Suite 420 Anchorage, AK 99503
CPT file : AP-224 (CPT-02)
3.00 ft
3.00 ft 2.60 Based on SBT
Use fill:
Fill height:
Fill weight:
Trans. detect. applied:
K applied:
No N/A N/A Yes No
Clay like behavior applied:
Limit depth applied:
Limit depth:
MSF method:
Sands only No N/A Method b d
Cone resistance qt (tsf) 4002000
Cone resistance SBTn Plot
DRILL OUT
Ic (Robertson 1990)
SBTn Plot CRR plot
DRILL OUT
CRR & CSR
0.60.40.20
CRR plot
During earthq.
qc1N,cs 200180160140120100806040200
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Liquefaction
No Liquefaction
Normalized friction ratio (%)
0.1 1 10
1,000
Friction Ratio
DRILL OUT
Rf (%) 1086420
Friction Ratio
Mw=71/2, sigma'=1 atm base curve Summary of liquefaction potential
FS Plot
DRILL OUT
Factor of safety 21.510.50
FS Plot
During earthq.
Zone A1: Cyclic liquefaction likely depending on size and duration of cyclic loading Zone A2: Cyclic liquefaction and strength loss likely depending on loading and ground geometry Zone B: Liquefaction and post-earthquake strength loss unlikely, check cyclic softening Zone C: Cyclic liquefaction and strength loss possible depending on soil plasticity, brittleness/sensitivity, strain to peak undrained strength and ground geometry
CLiq v.3.5.2.5 - CPT Liquefaction Assessment Software - Report created on: 2/9/2023, 2:25:17 PM Project file: C:\Users\adaggett\Downloads\lowell CPT.clq
65% Golder Associates USA Inc.Golder Associates USA Inc.Design Golder Associates USA Inc.Golder Associates USA Inc. GDR
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Analysis method:
Fines correction method:
Points to test:
Earthquake magnitude Mw:
Peak ground acceleration:
I&B (2008) I&B (2008) Based on Ic value 8.30 2.30
G.W.T. (in-situ):
G.W.T. (earthq.):
Average results interval:
Ic cut-off value:
Unit weight calculation:
Project title : Lowell Creek Diversion Dam and Tunnel U d
Location : Seward, AK
Golder Associates USA Inc.
1400 West Benson Blvd Suite 420 Anchorage, AK 99503
CPT file : AP-223 (CPT-01)
13.00 ft
13.00 ft 2.60 Based on SBT
Use fill:
Fill height:
Fill weight:
Trans. detect. applied:
K applied:
No N/A N/A Yes Yes
Clay like behavior applied:
Limit depth applied:
Limit depth:
MSF method:
Sands only No N/A Method b d
Cone resistance qt (tsf) 4002000
Cone resistance SBTn Plot
DRILL OUT
Ic (Robertson 1990)
SBTn Plot CRR plot
DRILL OUT
CRR & CSR
0.60.40.20
CRR plot
During earthq.
qc1N,cs 200180160140120100806040200
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Liquefaction
No Liquefaction
Normalized friction ratio (%)
0.1 1 10
1,000
Friction Ratio
DRILL OUT
Rf (%) 1086420
Friction Ratio
Mw=71/2, sigma'=1 atm base curve Summary of liquefaction potential
FS Plot
DRILL OUT
Factor of safety 21.510.50
FS Plot
During earthq.
Zone A1: Cyclic liquefaction likely depending on size and duration of cyclic loading Zone A2: Cyclic liquefaction and strength loss likely depending on loading and ground geometry Zone B: Liquefaction and post-earthquake strength loss unlikely, check cyclic softening Zone C: Cyclic liquefaction and strength loss possible depending on soil plasticity, brittleness/sensitivity, strain to peak undrained strength and ground geometry
CLiq v.3.5.2.5 - CPT Liquefaction Assessment Software - Report created on: 2/9/2023, 2:55:02 PM Project file: C:\Users\adaggett\Downloads\lowell CPT.clq
65% Golder Associates USA Inc.Golder Associates USA Inc.Design Golder Associates USA Inc.Golder Associates USA Inc. GDR
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Analysis method:
Fines correction method:
Points to test:
Earthquake magnitude Mw:
Peak ground acceleration:
I&B (2008) R&W (1998) Based on Ic value 8.30 2.30
G.W.T. (in-situ):
G.W.T. (earthq.):
Average results interval:
Ic cut-off value:
Unit weight calculation:
Project title : Lowell Creek Diversion Dam and Tunnel U d
Location : Seward, AK
Golder Associates USA Inc.
1400 West Benson Blvd Suite 420 Anchorage, AK 99503
CPT file : AP-224 (CPT-02)
3.00 ft
3.00 ft 2.60 Based on SBT
Use fill:
Fill height:
Fill weight:
Trans. detect. applied:
K applied:
No N/A N/A Yes No
Clay like behavior applied:
Limit depth applied:
Limit depth:
MSF method:
Sands only No N/A Method b d
Cone resistance qt (tsf) 4002000
Cone resistance SBTn Plot
DRILL OUT
Ic (Robertson 1990)
SBTn Plot CRR plot
DRILL OUT
CRR & CSR
0.60.40.20
CRR plot
During earthq.
qc1N,cs 200180160140120100806040200
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Liquefaction
No Liquefaction
Normalized friction ratio (%)
0.1 1 10
1,000
Friction Ratio
DRILL OUT
Rf (%) 1086420
Friction Ratio
Mw=71/2, sigma'=1 atm base curve Summary of liquefaction potential
FS Plot
DRILL OUT
Factor of safety 21.510.50
FS Plot
During earthq.
Zone A1: Cyclic liquefaction likely depending on size and duration of cyclic loading Zone A2: Cyclic liquefaction and strength loss likely depending on loading and ground geometry Zone B: Liquefaction and post-earthquake strength loss unlikely, check cyclic softening Zone C: Cyclic liquefaction and strength loss possible depending on soil plasticity, brittleness/sensitivity, strain to peak undrained strength and ground geometry
CLiq v.3.5.2.5 - CPT Liquefaction Assessment Software - Report created on: 2/9/2023, 2:55:03 PM Project file: C:\Users\adaggett\Downloads\lowell CPT.clq
65% Golder Associates USA Inc.Golder Associates USA Inc.Design Golder Associates USA Inc.Golder Associates USA Inc. GDR
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
L I Q UE F A CT I O N A N A L Y S I S R E P OR T
Analysis method:
Fines correction method:
Points to test:
Earthquake magnitude Mw:
Peak ground acceleration:
Robertson (2009) Robertson (2009) Based on Ic value 9.30 1.30
G.W.T. (in-situ):
G.W.T. (earthq.):
Average results interval:
Ic cut-off value:
Unit weight calculation:
Project title : Lowell Creek Diversion Dam and Tunnel U d
Location : Seward, AK
Golder Associates USA Inc.
1400 West Benson Blvd Suite 420 Anchorage, AK 99503
CPT file : AP-223 (CPT-01)
13.00 ft
13.00 ft 2.60 Based on SBT
Use fill:
Fill height:
Fill weight:
Trans. detect. applied:
K applied:
No N/A N/A Yes Yes
Clay like behavior applied:
Limit depth applied:
Limit depth:
MSF method:
All soils No N/A Method based
Cone resistance qt (tsf) 4002000
Cone resistance SBTn Plot
DRILL OUT
Ic (Robertson 1990)
SBTn Plot CRR plot
DRILL OUT
CRR & CSR
0.60.40.20
CRR plot
During earthq.
Qtn,cs 200180160140120100806040200
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Liquefaction
No Liquefaction
Normalized friction ratio (%)
0.1 1 10
1,000
Friction Ratio
DRILL OUT
Rf (%) 1086420
Friction Ratio
Mw=71/2, sigma'=1 atm base curve Summary of liquefaction potential
FS Plot
DRILL OUT
Factor of safety 21.510.50
FS Plot
During earthq.
Zone A1: Cyclic liquefaction likely depending on size and duration of cyclic loading Zone A2: Cyclic liquefaction and strength loss likely depending on loading and ground geometry Zone B: Liquefaction and post-earthquake strength loss unlikely, check cyclic softening Zone C: Cyclic liquefaction and strength loss possible depending on soil plasticity, brittleness/sensitivity, strain to peak undrained strength and ground geometry
CLiq v.3.5.2.5 - CPT Liquefaction Assessment Software - Report created on: 2/9/2023, 2:01:32 PM Project file: C:\Users\adaggett\Downloads\lowell CPT.clq
65% Golder Associates USA Inc.Golder Associates USA Inc.Design Golder Associates USA Inc.Golder Associates USA Inc.
1400 West Benson Blvd
GDR
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
L I Q UE F A CT I O N A N A L Y S I S R E P OR T
Analysis method:
Fines correction method:
Points to test:
Earthquake magnitude Mw:
Peak ground acceleration:
NCEER (1998)
NCEER (1998)
Based on Ic value 9.30 1.30
G.W.T. (in-situ):
G.W.T. (earthq.):
Average results interval:
Ic cut-off value:
Unit weight calculation:
Project title : Lowell Creek Diversion Dam and Tunnel U d
Location : Seward, AK
Golder Associates USA Inc.
1400 West Benson Blvd Suite 420 Anchorage, AK 99503
CPT file : AP-224 (CPT-02)
3.00 ft
3.00 ft 2.60 Based on SBT
Use fill:
Fill height:
Fill weight:
Trans. detect. applied:
K applied:
No N/A N/A Yes No
Clay like behavior applied:
Limit depth applied:
Limit depth:
MSF method:
Sands only No N/A Method based
Cone resistance qt (tsf) 4002000
Cone resistance SBTn Plot
DRILL OUT
Ic (Robertson 1990)
SBTn Plot CRR plot
DRILL OUT
CRR & CSR
0.60.40.20
CRR plot
During earthq.
Qtn,cs 200180160140120100806040200
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Liquefaction
No Liquefaction
Normalized friction ratio (%)
0.1 1 10
1,000
Friction Ratio
DRILL OUT
Rf (%) 1086420
Friction Ratio
Mw=71/2, sigma'=1 atm base curve Summary of liquefaction potential
FS Plot
DRILL OUT
Factor of safety 21.510.50
FS Plot
During earthq.
Zone A1: Cyclic liquefaction likely depending on size and duration of cyclic loading Zone A2: Cyclic liquefaction and strength loss likely depending on loading and ground geometry Zone B: Liquefaction and post-earthquake strength loss unlikely, check cyclic softening Zone C: Cyclic liquefaction and strength loss possible depending on soil plasticity, brittleness/sensitivity, strain to peak undrained strength and ground geometry
CLiq v.3.5.2.5 - CPT Liquefaction Assessment Software - Report created on: 2/9/2023, 2:01:32 PM Project file: C:\Users\adaggett\Downloads\lowell CPT.clq
65% Golder Associates USA Inc.Golder Associates USA Inc.Design Golder Associates USA Inc.Golder Associates USA Inc.
1400 West Benson Blvd
GDR
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Analysis method:
Fines correction method:
Points to test:
Earthquake magnitude Mw:
Peak ground acceleration:
NCEER (1998)
NCEER (1998)
Based on Ic value 8.30 2.30
G.W.T. (in-situ):
G.W.T. (earthq.):
Average results interval:
Ic cut-off value:
Unit weight calculation:
Project title : Lowell Creek Diversion Dam and Tunnel U d
Location : Seward, AK
Golder Associates USA Inc.
1400 West Benson Blvd Suite 420 Anchorage, AK 99503
CPT file : AP-223 (CPT-01)
13.00 ft
13.00 ft 2.60 Based on SBT
Use fill:
Fill height:
Fill weight:
Trans. detect. applied:
K applied:
No N/A N/A Yes Yes
Clay like behavior applied:
Limit depth applied:
Limit depth:
MSF method:
Sands only No N/A Method based
Cone resistance qt (tsf) 4002000
Cone resistance SBTn Plot
DRILL OUT
Ic (Robertson 1990)
SBTn Plot CRR plot
DRILL OUT
CRR & CSR
0.60.40.20
CRR plot
During earthq.
Qtn,cs 200180160140120100806040200
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Liquefaction
No Liquefaction
Normalized friction ratio (%)
0.1 1 10
1,000
Friction Ratio
DRILL OUT
Rf (%) 1086420
Friction Ratio
Mw=71/2, sigma'=1 atm base curve Summary of liquefaction potential
FS Plot
DRILL OUT
Factor of safety 21.510.50
FS Plot
During earthq.
Zone A1: Cyclic liquefaction likely depending on size and duration of cyclic loading Zone A2: Cyclic liquefaction and strength loss likely depending on loading and ground geometry Zone B: Liquefaction and post-earthquake strength loss unlikely, check cyclic softening Zone C: Cyclic liquefaction and strength loss possible depending on soil plasticity, brittleness/sensitivity, strain to peak undrained strength and ground geometry
CLiq v.3.5.2.5 - CPT Liquefaction Assessment Software - Report created on: 2/9/2023, 3:12:39 PM Project file: C:\Users\adaggett\Downloads\lowell CPT.clq
65% Golder Associates USA Inc.Golder Associates USA Inc.Design Golder Associates USA Inc.Golder Associates USA Inc. GDR
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Analysis method:
Fines correction method:
Points to test:
Earthquake magnitude Mw:
Peak ground acceleration:
NCEER (1998)
NCEER (1998)
Based on Ic value 8.30 2.30
G.W.T. (in-situ):
G.W.T. (earthq.):
Average results interval:
Ic cut-off value:
Unit weight calculation:
Project title : Lowell Creek Diversion Dam and Tunnel U d
Location : Seward, AK
Golder Associates USA Inc.
1400 West Benson Blvd Suite 420 Anchorage, AK 99503
CPT file : AP-224 (CPT-02)
3.00 ft
3.00 ft 2.60 Based on SBT
Use fill:
Fill height:
Fill weight:
Trans. detect. applied:
K applied:
No N/A N/A Yes No
Clay like behavior applied:
Limit depth applied:
Limit depth:
MSF method:
Sands only No N/A Method based
Cone resistance qt (tsf) 4002000
Cone resistance SBTn Plot
DRILL OUT
Ic (Robertson 1990)
SBTn Plot CRR plot
DRILL OUT
CRR & CSR
0.60.40.20
CRR plot
During earthq.
Qtn,cs 200180160140120100806040200
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Liquefaction
No Liquefaction
Normalized friction ratio (%)
0.1 1 10
1,000
Friction Ratio
DRILL OUT
Rf (%) 1086420
Friction Ratio
Mw=71/2, sigma'=1 atm base curve Summary of liquefaction potential
FS Plot
DRILL OUT
Factor of safety 21.510.50
FS Plot
During earthq.
Zone A1: Cyclic liquefaction likely depending on size and duration of cyclic loading Zone A2: Cyclic liquefaction and strength loss likely depending on loading and ground geometry Zone B: Liquefaction and post-earthquake strength loss unlikely, check cyclic softening Zone C: Cyclic liquefaction and strength loss possible depending on soil plasticity, brittleness/sensitivity, strain to peak undrained strength and ground geometry
CLiq v.3.5.2.5 - CPT Liquefaction Assessment Software - Report created on: 2/9/2023, 3:12:39 PM Project file: C:\Users\adaggett\Downloads\lowell CPT.clq
65% Golder Associates USA Inc.Golder Associates USA Inc.Design Golder Associates USA Inc.Golder Associates USA Inc. GDR
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
Depth (ft)
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