FAIRLEE IM 091-2(91) Addendum #2

FAIRLEE
IM 091-2(91)
VTRANS
Fairlee,
Vermont
GEOTECHNICAL DATA
REPORT
May 2024
PREPARED FOR
VTRANS
219 North Main Street
Barre, VT 05641
PREPARED BY
HNTB Corporation
9 Entin Road
Suite 202
Parsippany, NJ 07054
Phone: (973) 434-3100
Fax: (973)-434-3101
Contact: Joseph Juzwin, PE

VERMONT AGENCY OF TRANSPORTATION FAIRLEE IM 091-2(91)
FINAL GEOTECHNICAL DATA REPORT MAY 31, 2024
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VERMONT AGENCY OF TRANSPORTATION FAIRLEE IM 091-2(91)
FINAL GEOTECHNICAL DATA REPORT MAY 31, 2024
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VERMONT AGENCY OF TRANSPORTATION FAIRLEE IM 091-2(91)
FINAL GEOTECHNICAL DATA REPORT MAY 31, 2024
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VERMONT AGENCY OF TRANSPORTATION FAIRLEE IM 091-2(91)
FINAL GEOTECHNICAL DATA REPORT MAY 31, 2024
Approximate
Total
Boring Northing Easting
Alignment Station Offset Ground Elev.
Depth (ft)
Number (ft) (ft)
(ft)
B-101 509994.1 1729122.2 I-91 SB 4794+25 27.0 LT 435.0 8.0
B-101A 509988.0 1729113.0 I-91 SB 4795+99 26.6 LT 435.0 67.0
B-102 510020.1 1729163.6 I-91 SB 4796+28 27.3 LT 432.0 92.0
B-103 509912.7 1729109.2 I-91 NB 4794+25 38.5 LT 434.0 81.0
B-104 509945.7 1729176.6 I-91 NB 4794+99 31.2 LT 433.0 96.0
B-105 510018.3 1729282.9 I-91 NB 4796+28 37.1 LT 432.0 96.0
B-106 509926.9 1729252.0 I-91 NB 4795+54 24.4 RT 431.0 46.0
B-106A 509929.9 1729257.0 I-91 NB 4795+59 24.5 RT 430.0 82.0
B-107 509953.5 1729312.3 I-91 NB 4796+19 33.5 RT 430.0 82.0
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VERMONT AGENCY OF TRANSPORTATION FAIRLEE IM 091-2(91)
FINAL GEOTECHNICAL DATA REPORT MAY 31, 2024
Table 4-1: Summary of Assigned Laboratory Tests
Test Number of Tests Standard
Water Content 9 ASTM D2216
Atterberg Limits 9 ASTM D4318
Grain Size Analysis 1 ASTM D422
Percent Passing No. 200 Sieve 4 ASTM D1140
Triaxial Unconsolidated Undrained Test 4 ASTM D2850
Triaxial Consolidated Undrained Test 3 ASTM D4767
Table 4-2: Summary of Laboratory Index Testing Results
Water Fines
Liquid Plastic Plasticity
Boring Sample
Content Content
Depth (ft)
Limit Limit Index
Number No.
(%) (%)
B-101A S-11 35-37 - - - - 83.9
B-101A S-12 40-42 27.0 24 20 4 92.4
B-101A S-14 50-52 31.8 NP NP NP -
B-102 S-14 50-52 31.5 35 17 18 -
B-102 S-16 59-61 37.4 NP NP NP -
B-103 S-13 50-52 32.0 33 21 12 80.2
B-103 S-15 59-61 40.1 51 25 26 -
B-103 S-17 74-76 32.0 NP NP NP -
B-104 S-16 59-61 34.5 39 23 16 -
B-104 S-19 74-76 34.9 NP NP NP -
B-105 S-8 19-21 - - - - 97.6
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VERMONT AGENCY OF TRANSPORTATION FAIRLEE IM 091-2(91)
FINAL GEOTECHNICAL DATA REPORT MAY 31, 2024
Water Fines
Liquid Plastic Plasticity
Boring Sample
Content Content
Depth (ft)
Limit Limit Index
Number No.
(%) (%)
B-106A S-5 60-62 34.3 38 20 18 -
B-107 S-10 30-32 26.6 26 22 4 -
B-107 S-15 55-57 27.0 NP NP NP 78.7
Table 4-3: Summary of UU Testing Results
Peak Undrained
Confining
Test Deviator Shear
Boring Sample Depth
Stress
No. Stress Strength,
Number No. (ft)
(psf)
(psf) Su (psf)
1 8050 1610 805.2
B-102 UD-1 57-59
2 5350 1025 512.6
1 8300 2275 1138.0
B-107 UD-1 62-64
2 5500 2044 1022.0
Table 4-4: Summary of CIU Testing Results
Vertical Effective
Test Effective Cohesion Friction
Boring Sample Depth
No. Stress (psf) Angle
Number No. (ft)
(psf) (deg)
1 3993
B-106A UD-1 62-64 2 4996 973 16.7
3 5972
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VERMONT AGENCY OF TRANSPORTATION FAIRLEE IM 091-2(91)
FINAL GEOTECHNICAL DATA REPORT MAY 31, 2024
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FIGURES

PROJECT SITE LOCATION
FIGURE
PROJECT SITE LOCATION
MAP
VTRANS
BRIDGES 55-2 AND 55-3 INTERSTATE
91 (I-91) OVER LAKE MOREY OUTLET
1000 0 1000 2000 IM 091-2(91)
FEET FAIRLEE, VT
Basemaps: U.S.G.S. Fairlee, VT-NH Quadrangle US Topo, 2015