Certified_Final_Tech_Specs_Volume_2D-1_-_GBR_Appendix_D-1.pdf

W911WN-13-R-0002

East Branch Lake East Branch Clarion River Elk County, Pennsylvania Dam Safety Modifications/Cutoff Wall

Certified Final Document Volume 2D-1 – Geotechnical Baseline Report, Appendix D-1 April 2013

Appendix D

Boring Logs

This Appendix contains boring logs obtained at East Branch. In summary:

1. Borings 1-122 and SB1-SB-8 are shown on As-Built Drawings 10-038b-U1-10/14 through 038b- U1-10/22. These borings were performed prior to construction of East Branch Dam.

2. Borings entitled 77-EBD-11 through 77-EBD-28 are shown on As-Built Drawings 10-038b-U1- 10/33 though 10-038b-U1-10/36. Borings D-77-1 through D-77-3 are shown on As-Built Drawing 10-038b-U1-10/32. Borings E-1 through E-5 are shown on As-Built Drawing 10-038b-U1-10/31.

This series of borings was performed in 1977 during an extensive exploration on site.

Exploration included piezometer installation (77-EBD-11 through 77-EBD-28), dye testing (D-77- 1 through D-77-3), and exploratory drilling in the grouted void area (E-1 through E-5).

3. Borings E6 through E-23 were drilled during 1981 as part of an exploratory boring program.

These borings are shown on As-Built drawings 10-038b0U1-88/38 through As-Built drawings 10- 038b0U1-88/41. These borings are generally located near the grouted void.

4. Borings 90-EBD-30 through 90-EBD-50 are shown on As-Built Drawings 10-038b-U1-88/15 through 10-038b-U1-88/17. These borings were performed in 1990 as part of piezometer installation.

5. Borings 97-EBD-51 through 97-EBD-57 were performed in 1997. The boring logs are summarized in Appendix A of the Left Abutment Seepage Evaluation Report. These borings were performed as part of an exploration aimed at obtaining additional information in the left abutment for use in evaluation of the seepage conditions. Piezometers were installed in these boreholes as part of the exploratory effort.

6. Borings 99-EBD-58 through 99-EBD-64 were performed in 1999. The boring logs are summarized on sheets EB-3.1 and -4.1 from the 1999 Piezometer Installation Report. These piezometers were installed to replace several 1972 piezometers that were not functioning properly.

7. Borings 08-EBD-65L through 08-EBD-81 and E-24 through E-26 were drilled during the 2008- 2009 geotechnical explorations. Various borings during this exploration were drilled using different methods to obtain additional information in conjunction with the ongoing Dam Safety Modification Study. These borings were taken from Appendix A of the 2009 Geotechnical Exploration Report.

8. Borings 10-EBD-82, 10-EBD-83, 10-EBD-I1, and 10-EBD-I2 were drilled during 2010 as part of an instrumentation installation in conjunction with the Interim Risk Reduction Measures implemented in 2008. These borings are located near the grouted void area. The boring logs are from Appendix A of the 2010 Instrumentation Installation Report.

9. Borings E-27 through E-38 and R-1 through R-5 were drilled during 2011 and 2012 as part of an exploratory program on the East Branch Site. Borings E-27 through E-31 were drilled in a variety of locations (upstream, crest, downstream, and toe) in an effort to obtain both additional bedrock information and to perform HTRW testing in areas near known pre-construction oil wells. Borings E-32 through E-38 were performed on the hillside along the upstream left bank approach for characterization of the potential borrow area. Borings R-1 through R-5 were obtained along the access roadway for use in design of Phase I site improvements. These boring logs are from Appendix A of the 2011 Geotechnical Exploration Report.

10. Borings E-39 through E-59 were performed along the crest of the dam and along the bend section near the spillway. Locations were selected to provide information along the proposed cutoff wall alignment with a focus on areas were data gaps were present. These boring logs are from Appendix A of the 2012 Geotechnical Exploration Report.

11. Borings 12-EBD-84 through 12-EBD-92 are from installation of a series of piezometers along the upstream face of the crest. These piezometers were installed in preparation for monitoring of piezometric levels across the dam during cutoff wall construction. Borings E-60 through E-62 were also performed during this exploration. These borings were performed in the borrow area on the upstream left bank. These boring logs were taken from Appendix D of the 2012 Geotechnical Data report.

12. All elevations shown on boring logs are NAVD 29 except the 2009 Geotechnical Exploration, 2010 Instrumentation Installation, 2011 Geotechnical Exploration, 2012 Geotechnical Exploration, and 2012 Instrumentation Installation. Elevations shown on boring logs from those these explorations are shown in NAVD 88. Based on survey data, the conversion from NAVD 29 to NAVD 88 is -0.32 ft at East Branch Dam.

Boring Stataion Offseta Northing Easting Depth

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

1 --b --b 508765.10 1736826.10 216.6 0 1715.4 1498.8 1712.9 As-Buit 038b-U1-10/14 2 --b --b 508651.10 1737084.10 68.9 0 1556.6 1487.7 1531.6 As-Buit 038b-U1-10/14 3 --b --b 508618.10 1737104.10 81.8 0 1542.1 1460.3 1517.1 As-Buit 038b-U1-10/14 4 --b --b 508525.10 1737246.10 106.2 0 1535.5 1429.3 1481.5 As-Buit 038b-U1-10/16 5 --b --b 508422.10 1737423.10 100.0 0 1540.2 1440.2 1490.2 As-Buit 038b-U1-10/16 6 --b --b 508304.10 1737627.10 118.0 0 1571.1 1453.1 1505.1 As-Buit 038b-U1-10/16 7 --b --b 508206.10 1737795.10 116.4 0 1604.0 1487.6 1509.0 As-Buit 038b-U1-10/16 8 --b --b 508121.10 1737942.10 131.1 0 1629.4 1498.3 1545.4 As-Buit 038b-U1-10/16 9 --b --b 508023 10 1738111 10 114 9 0 1658 9 1544 0 1601 9 As-Buit 038b-U1-10/16

Summary of Basic Information from Boring Logs

9 -- -- 508023.10 1738111.10 114.9 0 1658.9 1544.0 1601.9 As-Buit 038b-U1-10/16 10 --b --b 507925.10 1738281.10 84.3 0 1699.2 1614.9 1677.9 As-Buit 038b-U1-10/16 11 --b --b 507574.90 1738075.50 40.9 0 1708.5 1667.6 1687.5 As-Buit 038b-U1-10/16 12 --b --b 508275.10 1738473.10 55.5 0 1692.7 1637.2 1675.0 As-Buit 038b-U1-10/17 13 --b --b 508629.40 1738667.50 51.0 0 1682.0 1631.0 1658.0 As-Buit 038b-U1-10/17 14 --b --b 509205.10 1737463.10 96.5 0 1552.2 1455.7 1494.7 As-Buit 038b-U1-10/14 15 --b --b 509146.10 1737511.10 68.5 0 1529.3 1460.8 1481.3 As-Buit 038b-U1-10/14 16 --b --b 508054.57 1736770.48 34.2 0 1563.1 1528.9 1539.1 As-Buit 038b-U1-10/14 17 --b --b 508029.97 1736816.35 44.1 0 1509.1 1465.0 1504.9 As-Buit 038b-U1-10/14 18 --b --b 507816.10 1738476.10 99.0 0 1756.9 1657.9 1747.9 As-Buit 038b-U1-10/17 19 --b --b 507722.10 1738642.10 88.0 0 1803.9 1715.9 1766.2 As-Buit 038b-U1-10/17 20 --b --b 507625.10 1738811.10 100.0 0 1863.7 1763.7 1850.2 As-Buit 038b-U1-10/17 21 --b --b 507404.80 1738384.60 175.0 0 1815.3 1640.3 1798.3 As-Buit 038b-U1-10/17 22 b b 507145 10 1738078 70 188 0 0 1808 2 1620 2 1790 7 As B it 038b U1 10/1722 --b --b 507145.10 1738078.70 188.0 0 1808.2 1620.2 1790.7 As-Buit 038b-U1-10/17 23 --b --b 506883.10 1737764.60 175.0 0 1752.6 1577.6 1748.6 As-Buit 038b-U1-10/18 24 --b --b 507261.70 1737852.70 80.0 0 1700.3 1620.3 1691.3 As-Buit 038b-U1-10/18 25 --b --b 506967.00 1737578.60 83.0 0 1664.8 1581.8 1649.4 As-Buit 038b-U1-10/18 26 --b --b 506585.00 1737283.20 47.0 0 1600.3 1553.3 1591.3 As-Buit 038b-U1-10/18 27 --b --b 509256.10 1737361.10 110.4 0 1600.1 1489.7 1594.7 As-Buit 038b-U1-10/14 28 --b --b 509395.10 1737201.10 129.6 0 1660.7 1531.1 1648.7 As-Buit 038b-U1-10/14 29 --b --b 508166.70 1738796.20 110.8 0 1770.5 1659.7 1758.5 As-Buit 038b-U1-10/18 30 --b --b 509888.90 1738284.90 30.0 0 1561.1 1531.1 -- c As-Buit 038b-U1-10/18 31 --b --b 510093.00 1738049.60 32.5 0 1599.2 1566.7 -- c As-Buit 038b-U1-10/18 32 --b --b 510263.60 1737843.40 29.0 0 1640.5 1611.5 -- c As-Buit 038b-U1-10/18 33 --b --b 510433.80 1737643.90 16.0 0 1689.6 1673.6 -- c As-Buit 038b-U1-10/18 34 --b --b 510334.00 1738687.50 30.0 0 1558.7 1528.7 -- c As-Buit 038b-U1-10/18 f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

e Boring 90-EBD-47 was abandoned and piezometer is located in boring 90-EBD-47A g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Not available, see as-built drawings c Top of Rock was not noted in boring log.

d Value corresponds to top of grout cap from boring log.

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

35 --b --b 510520.50 1738483.40 18.0 0 1584.3 1566.3 -- c As-Buit 038b-U1-10/18 36 --b --b 510664.80 1738324.20 19.4 0 1618.5 1599.1 -- c As-Buit 038b-U1-10/18 37 --b --b 510796.10 1738181.80 12.0 0 1675.1 1663.1 -- c As-Buit 038b-U1-10/18 38 --b --b 510772.70 1739168.70 30.0 0 1558.8 1528.8 -- c As-Buit 038b-U1-10/18 39 --b --b 510912.50 1739017.30 33.0 0 1587.0 1554.0 -- c As-Buit 038b-U1-10/18 40 --b --b 511071.00 1738838.70 29.5 0 1617.2 1587.7 -- c As-Buit 038b-U1-10/19 41 --b --b 511254.30 1738646.50 21.8 0 1679.5 1657.7 -- c As-Buit 038b-U1-10/19 42 --b --b 510559.00 1739768.60 30.0 0 1568.7 1538.7 -- c As-Buit 038b-U1-10/19 43 --b --b 510389 50 1739869 20 29 0 0 1603 2 1574 2 -- c As-Buit 038b-U1-10/19

Summary of Basic Information from Boring Logs

43 -- -- 510389.50 1739869.20 29.0 0 1603.2 1574.2 -- As-Buit 038b-U1-10/19 44 --b --b 510222.60 1739971.20 10.0 0 1648.7 1638.7 -- c As-Buit 038b-U1-10/19 45 --b --b --b --b 30.0 0 1566.6 1563.6 -- c As-Buit 038b-U1-10/19 46 --b --b --b --b 22.5 0 1600.2 1577.7 -- c As-Buit 038b-U1-10/19 47 --b --b --b --b 21.5 0 1638.7 1617.2 -- c As-Buit 038b-U1-10/19 48 --b --b --b --b 24.0 0 1567.2 1543.2 -- c As-Buit 038b-U1-10/19 49 --b --b --b --b 35.1 0 1596.2 1561.1 -- c As-Buit 038b-U1-10/19 50 --b --b --b --b 11.5 0 1635.2 1623.7 -- c As-Buit 038b-U1-10/19 51 --b --b --b --b 30.0 0 1566.6 1536.9 -- c As-Buit 038b-U1-10/19 52 --b --b --b --b 14.3 0 1586.3 1572.0 -- c As-Buit 038b-U1-10/19 53 --b --b --b --b 30.0 0 1569.4 1539.4 -- c As-Buit 038b-U1-10/19 54 --b --b --b --b 27.0 0 1590.0 1563.0 -- c As-Buit 038b-U1-10/19 55 --b --b --b --b 15.0 0 1619.3 1604.3 -- c As-Buit 038b-U1-10/19 56 b b b b 30 0 0 1574 4 1544 4 c As B it 038b U1 10/1956 --b --b --b --b 30.0 0 1574.4 1544.4 -- c As-Buit 038b-U1-10/19 57 --b --b --b --b 15.0 0 1589.9 1573.9 -- c As-Buit 038b-U1-10/19 58 --b --b --b --b 30.0 0 1561.7 1531.7 -- c As-Buit 038b-U1-10/19 59 --b --b --b --b 48.0 0 1577.2 1529.2 -- c As-Buit 038b-U1-10/19 60 --b --b --b --b 16.5 0 1621.2 1604.7 -- c As-Buit 038b-U1-10/19 61 --b --b --b --b 30.0 0 1566.6 1536.6 -- c As-Buit 038b-U1-10/19 62 --b --b --b --b 35.5 0 1590.4 1554.9 -- c As-Buit 038b-U1-10/19 63 --b --b --b --b 39.5 0 1623.7 1584.2 -- c As-Buit 038b-U1-10/19 64 --b --b --b --b 42.0 0 1568.2 1526.2 -- c As-Buit 038b-U1-10/19 65 --b --b --b --b 19.0 0 1618.7 1599.7 -- c As-Buit 038b-U1-10/20 66 --b --b --b --b 33.0 0 1571.7 1538.7 -- c As-Buit 038b-U1-10/20 67 --b --b --b --b 40.0 0 1589.2 1549.2 -- c As-Buit 038b-U1-10/20 68 --b --b --b --b 46.0 0 1611.2 1565.2 -- c As-Buit 038b-U1-10/20 f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Not available, see as-built drawings c Top of Rock was not noted in boring log.

e Boring 90-EBD-47 was abandoned and piezometer is located in boring 90-EBD-47A

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

69 --b --b --b --b 27.0 0 1631.2 1604.2 -- c As-Buit 038b-U1-10/20 70 --b --b --b --b 24.0 0 1561.1 1537.1 -- c As-Buit 038b-U1-10/20 71 --b --b --b --b 15.0 0 1585.9 1570.9 -- c As-Buit 038b-U1-10/20 72 --b --b 507833.30 1736658.10 45.8 0 1561.5 1515.7 1531.5 As-Buit 038b-U1-10/14 73 --b --b 509357.60 1737529.50 66.0 0 1575.7 1509.7 1644.7 As-Buit 038b-U1-10/14 74 --b --b 509503.00 1737429.20 34.8 0 1635.5 1600.7 1612.7 As-Buit 038b-U1-10/14 75 --b --b 509591.40 1737344.90 41.2 0 1685.9 1644.7 1665.9 As-Buit 038b-U1-10/14 76 --b --b 509306.60 1737449.60 85.0 0 1584.2 1499.2 1558.2 As-Buit 038b-U1-10/14 77 --b --b 509346 00 1737410 00 104 0 0 1603 7 1499 7 1584 7 As-Buit 038b-U1-10/14

Summary of Basic Information from Boring Logs

77 -- -- 509346.00 1737410.00 104.0 0 1603.7 1499.7 1584.7 As-Buit 038b-U1-10/14 78 --b --b 509183.70 1737333.10 45.8 0 1584.7 1538.9 1559.7 As-Buit 038b-U1-10/14 79 --b --b 509223.60 1737256.00 101.5 0 1617.2 1515.7 1605.2 As-Buit 038b-U1-10/14 80 --b --b 509017.70 1737250.70 90.0 0 1569.7 1479.7 1554.7 As-Buit 038b-U1-10/14 81 --b --b 508979.90 1737061.80 125.8 0 1635.5 1509.7 1623.5 As-Buit 038b-U1-10/15 82 --b --b 508713.10 1736924.10 134.7 0 1644.4 1509.7 1633.4 As-Buit 038b-U1-10/15 83 --b --b 508449.30 1736793.00 130.5 0 1639.4 1508.9 1624.4 As-Buit 038b-U1-10/15 87 --b --b 508299.50 1736901.20 49.4 0 1547.1 1497.7 1537.1 As-Buit 038b-U1-10/15 90 --b --b 508169.00 1736749.50 95.0 0 1594.2 1499.2 1576.9 As-Buit 038b-U1-10/15 91 --b --b 508078.10 1736724.10 65.0 0 1579.7 1514.7 1562.4 As-Buit 038b-U1-10/15 92 --b --b 508123.10 1736639.10 70.8 0 1609.7 1538.9 1593.7 As-Buit 038b-U1-10/15 93 --b --b 507935.50 1736732.20 57.0 0 1556.3 1499.3 1531.0 As-Buit 038b-U1-10/15 94 --b --b 507796.80 1736778.10 63.4 0 1543.1 1479.7 1497.7 As-Buit 038b-U1-10/15 95 b b 508230 10 1738517 10 66 0 0 1715 7 1649 7 1687 7 As B it 038b U1 10/2095 --b --b 508230.10 1738517.10 66.0 0 1715.7 1649.7 1687.7 As-Buit 038b-U1-10/20 96 --b --b 508161.10 1738615.10 114.0 0 1738.7 1624.7 1728.7 As-Buit 038b-U1-10/20 97 --b --b 508008.38 1738607.33 70.0 0 1759.7 1689.7 1742.5 As-Buit 038b-U1-10/20 98 --b --b 507861.40 1738382.60 111.0 0 1736.2 1625.2 1709.5 As-Buit 038b-U1-10/20 99 --b --b 507733.10 1738205.10 91.0 0 1712.7 1621.7 1693.7 As-Buit 038b-U1-10/20 100 --b --b 507545.70 1738127.60 121.0 0 1732.7 1611.7 1707.7 As-Buit 038b-U1-10/21 101 --b --b 507450.10 1737906.10 71.0 0 1680.7 1609.7 1667.7 As-Buit 038b-U1-10/21 102 --b --b 507318.00 1737740.30 75.7 0 1660.4 1584.7 1640.4 As-Buit 038b-U1-10/21 103 --b --b 507170.10 1737615.10 64.7 0 1644.4 1579.7 1630.2 As-Buit 038b-U1-10/21 104 --b --b 507035.30 1737438.70 53.5 0 1605.2 1551.7 1592.7 As-Buit 038b-U1-10/21 105 --b --b 506929.10 1737352.10 57.2 0 1591.9 1534.7 1576.1 As-Buit 038b-U1-10/21 106 --b --b 506813.00 1737273.50 61.9 0 1569.6 1507.7 1558.5 As-Buit 038b-U1-10/21 107 --b --b 506849.50 1737239.00 47.7 0 1555.7 1508.0 1549.7 As-Buit 038b-U1-10/21 f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Not available, see as-built drawings c Top of Rock was not noted in boring log.

d Value corresponds to top of grout cap from boring log.

g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

108 --b --b 506778.00 1737197.10 38.2 0 1533.0 1494.8 1527.4 As-Buit 038b-U1-10/21 109 --b --b 508227.10 1736932.70 24.5 0 1528.7 1504.2 -- c As-Buit 038b-U1-10/21 110 --b --b 508158.90 1737041.90 39.0 0 1529.7 1490.7 -- c As-Buit 038b-U1-10/21 111 --b --b 508061.90 1737220.60 51.0 0 1534.0 1483.0 -- c As-Buit 038b-U1-10/21 112 --b --b 508384.50 1737054.80 26.4 0 1527.7 1501.3 -- c As-Buit 038b-U1-10/21 113 --b --b 508283.80 1737228.00 54.0 0 1533.5 1479.5 1480.5 As-Buit 038b-U1-10/22 114 --b --b 508184.20 1737405.30 53.0 0 1545.7 1492.7 1493.2 As-Buit 038b-U1-10/22 115 --b --b 508079.40 1737579.70 75.7 0 1584.9 1509.2 -- c As-Buit 038b-U1-10/22 116 --b --b 508050 60 1737789 60 87 0 0 1615 2 1528 2 -- c As-Buit 038b-U1-10/22

Summary of Basic Information from Boring Logs

116 -- -- 508050.60 1737789.60 87.0 0 1615.2 1528.2 -- As-Buit 038b-U1-10/22 117 --b --b 508762.90 1737204.30 28.9 0 1528.7 1499.8 1500.7 As-Buit 038b-U1-10/22 118 --b --b 508631.70 1737425.60 55.0 0 1535.2 1480.2 -- c As-Buit 038b-U1-10/22 119 --b --b 508535.10 1737597.70 51.9 0 1555.6 1503.7 -- c As-Buit 038b-U1-10/22 120 --b --b 508432.90 1737773.60 65.8 0 1585.5 1519.7 -- c As-Buit 038b-U1-10/22 121 --b --b 508333.30 1737950.90 77.5 0 1616.9 1539.4 -- c As-Buit 038b-U1-10/22 122 --b --b 508861.40 1737437.40 52.0 0 1535.5 1483.5 -- c As-Buit 038b-U1-10/22 123 --b --b --b --b 48.4 0 1542.4 1493.9 -- c As-Buit 038b-U1-10/22 124 --b --b --b --b 61.0 0 1565.7 1504.7 -- c As-Buit 038b-U1-10/22 125 --b --b --b --b 51.0 0 1536.6 1485.6 -- c As-Buit 038b-U1-10/22 SB1 --b --b --b --b 48.0 0 1627.2 1579.2 1579.2 As-Buit 038b-U1-10/15 SB2 --b --b --b --b 54.5 0 1633.7 1579.2 1579.2 As-Buit 038b-U1-10/15 SB3 --b --b --b --b 54.0 0 1633.7 1579.7 1579.7 As-Buit 038b-U1-10/15 SB4 b b b b 60 5 0 1640 2 1579 7 1579 7 As B it 038b U1 10/15SB4 --b --b --b --b 60.5 0 1640.2 1579.7 1579.7 As-Buit 038b-U1-10/15 SB5 --b --b --b --b 43.4 0 1682.0 1638.6 1638.6 As-Buit 038b-U1-10/15 SB6 --b --b --b --b 50.0 0 1689.7 1639.7 1639.7 As-Buit 038b-U1-10/15 SB7 --b --b --b --b 49.0 0 1688.7 1639.7 1639.7 As-Buit 038b-U1-10/15 SB8 --b --b --b --b 56.4 0 1696.1 1639.7 1639.7 As-Buit 038b-U1-10/15 77-EBD-11 21+21.27 124.11 507942.90 1737238.06 183.0 0 1654.6 1591.6 1597.6 As-Built 038b-U1-10/33 77-EBD-12 21+78.39 105.93 507930.85 1736891.03 13.0 0 1663.8 1610.7 1620.8 As-Built 038b-U1-10/33 77-EBD-13A/14A 22+20.42 90.23 507924.01 1736970.21 37.0 0 1671.9 1610.7 1636.4 As-Built 038b-U1-10/33 77-EBD-15 22+78.84 70.74 507912.46 1737114.14 60.5 0 1683.5 1598.5 1646.2 As-Built 038b-U1-10/33 77-EBD-16 23+9.02 21.60 507921.04 1737060.79 36.5 0 1706.1 1605.7 1671.1 As-Built 038b-U1-10/34 77-EBD-17/18 14+03.48 -9.73 508410.45 1737157.71 20.5 0 1705.8 1505.3 -- c As-Built 038b-U1-10/34 77-EBD-19/20 14+03.63 81.67 508330.63 1737344.12 21.0 0 1670.1 1488.6 1490.1 As-Built 038b-U1-10/35 77-EBD-21/22 14+03.28 221.81 508208.54 1737542.21 20.0 0 1608.7 1540.2 -- c As-Built 038b-U1-10/35 f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Not available, see as-built drawings c Top of Rock was not noted in boring log.

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

77-EBD-23/24 8+34.14 -30.67 508706.95 1737738.28 20.5 0 1696.4 1599.9 1601.9 As-Built 038b-U1-10/36 77-EBD-25/26 8+35.02 46.25 508639.41 1737934.52 20.5 0 1687.0 1606.0 1607.5 As-Built 038b-U1-10/36 77-EBD-27/28 8+33.60 102.00 508591.46 1738129.11 20.5 0 1659.7 1610.7 -- c As-Built 038b-U1-10/36 90-EBD-30 7+33.97 -49.31 508772.16 1737624.41 35.0 0 1690.1 1678.5 -- b As-Built 038b-U1-88/15 90-EBD-31 7+37.85 -49.99 508770.86 1738037.15 63.0 0 1686.2 1632.6 1639.7 As-Built 038b-U1-88/15 90-EBD-32 7+38.63 10.46 508717.74 1738095.87 53.1 0 1706.8 1678.5 -- c As-Built 038b-U1-88/15 90-EBD-33 7+40.18 48.71 508683.61 1738140.21 61.2 0 1691.8 1678.3 -- c As-Built 038b-U1-88/15 90-EBD-34 7+42.86 48.90 508682.14 1738200.71 85.0 0 1691.8 1643.8 1662.8 As-Built 038b-U1-88/15 90-EBD-35 8+26 06 -29 13 508709 55 1738285 95 100 4 0 1698 3 1639 3 -- c As-Built 038b-U1-88/15

Summary of Basic Information from Boring Logs

90-EBD-35 8+26.06 -29.13 508709.55 1738285.95 100.4 0 1698.3 1639.3 -- As-Built 038b-U1-88/15 90-EBD-36 8+21.53 9.78 508677.82 1737476.32 200.5 0 1706.3 1657.7 -- c As-Built 038b-U1-88/15 90-EBD-37 8+28.16 10.45 508674.00 1737431.78 181.5 0 1706.7 1627.7 -- c As-Built 038b-U1-88/15 90-EBD-38 8+33.13 10.59 508671.44 1737362.99 68.5 0 1706.0 1601.0 -- c As-Built 038b-U1-88/16 90-EBD-39 8+30.15 79.19 508613.05 1736989.82 96.5 0 1674.1 1628.7 -- c As-Built 038b-U1-88/16 90-EBD-40 9+18.59 -62.75 508693.67 1736953.00 81.0 0 1685.7 1618.7 -- c As-Built 038b-U1-88/16 90-EBD-41 9+23.73 -60.73 508689.39 1736924.52 49.0 0 1685.7 1529.0 1551.8 As-Built 038b-U1-88/16 90-EBD-42 9+06.24 10.16 508636.09 1736931.95 0.0 0 1706.1 1658.1 -- c As-Built 038b-U1-88/16 90-EBD-43 9+11.78 10.21 508633.34 1736911.54 11.6 0 1706.6 1618.6 -- c As-Built 038b-U1-88/16 90-EBD-44 9+17.64 10.55 508630.18 1736915.26 53.6 0 1706.6 1557.6 -- c As-Built 038b-U1-88/16 90-EBD-45 9+14.86 60.65 508587.83 1737015.62 37.5 0 1681.2 1643.7 -- c As-Built 038b-U1-88/17 90-EBD-46 9+19.29 60.26 508586.00 1737019.68 87.3 0 1681.2 1593.9 -- c As-Built 038b-U1-88/17 90-EBD-47e 9+20 60 --b --b 147.0 0 1680.7 1534.2 1544.5 As-Built 038b-U1-88/17 90 EBD 47A 9+25 54 54 75 508587 76 1737027 82 154 0 0 1685 7 1531 7 1544 7 As B ilt 038b U1 88/1790-EBD-47A 9+25.54 54.75 508587.76 1737027.82 154.0 0 1685.7 1531.7 1544.7 As-Built 038b-U1-88/17 90-EBD-48 9+20.06 101.26 508549.86 1737000.31 45.5 0 1661.8 1616.3 -- c As-Built 038b-U1-88/17 90-EBD-50 11+14.06 10.51 508534.23 1737213.92 188.5 0 1706.5 1518.0 -- c As-Built 038b-U1-88/17 97-EBD-51 22+00.95 9.99 508003.53 1738162.44 114.2 0 1706.4 1592.2 1632.9 Appendix A, 1998 Left Abutment Seepage Evaluation Report 97-EBD-52 23+74.52 -90.96 508006.78 1738363.20 103.8 0 1703.8 1600.0 1669.5 Appendix A, 1998 Left Abutment Seepage Evaluation Report 97-EBD-53 23+25.00 22.78 507931.75 1738264.42 106.0 0 1705.3 1599.3 1664.9 Appendix A, 1998 Left Abutment Seepage Evaluation Report 97-EBD-54 23+23.74 21.91 507933.12 1738263.74 65.9 0 1705.1 1639.2 1665.1 Appendix A, 1998 Left Abutment Seepage Evaluation Report 97-EBD-55 22+44.05 253.58 507769.94 1738081.00 105.7 0 1676.9 1571.2 1643.2 Appendix A, 1998 Left Abutment Seepage Evaluation Report 97-EBD-56 23+34.84 -89.13 508024.58 1738327.69 110.7 0 1702.6 1591.9 1654.7 Appendix A, 1998 Left Abutment Seepage Evaluation Report 97-EBD-57 23+16.16 15.16 507942.72 1738260.43 114.1 0 1706.2 1592.1 1676.2 Appendix A, 1998 Left Abutment Seepage Evaluation Report 99-EBD-58 11+12.55 41.93 508507.55 1737197.25 131.0 0 1690.9 1559.9 -- c 1999 Piezometer Installation Report, Drawing EB-3.1 99-EBD-59 11+02.79 41.85 508512.39 1737188.77 181.5 0 1690.6 1509.1 -- c 1999 Piezometer Installation Report, Drawing EB-3.1 99-EBD-60 11+10.70 166.95 508399.38 1737134.54 80.2 0 1631.8 1551.6 -- c 1999 Piezometer Installation Report, Drawing EB-3.1 f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

e Boring 90-EBD-47 was abandoned and piezometer is located in boring 90-EBD-47A g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Not available, see as-built drawings

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

99-EBD-61 10+99.67 166.98 508404.75 1737124.90 104.4 0 1631.9 1527.5 -- c 1999 Piezometer Installation Report, Drawing EB-4.1 99-EBD-62 11+03.16 293.13 508292.98 1737066.30 30.5 0 1582.1 1551.6 -- c 1999 Piezometer Installation Report, Drawing EB-4.1 99-EBD-63 10+95.34 294.92 508295.24 1737058.60 52.5 0 1581.6 1529.1 -- c 1999 Piezometer Installation Report, Drawing EB-4.1 99-EBD-64 9+33.62 9.74 508623.08 1737056.87 145.6 0 1706.7 1561.1 -- c 1999 Piezometer Installation Report, Drawing EB-4.1 08-EBD-65Lf 7+87.62 4.92 508698.64 1736931.90 86.0 0 1707.0 1621.0 1626.0d Appendix A, 2009 Geotechnical Exploration Report 08-EBD-66Lf 9+84.88 4.20 508602.86 1737065.83 195.5 0 1707.0 1511.5 -- c Appendix A, 2009 Geotechnical Exploration Report 08-EBD-67Lf 10+69.97 3.91 508561.53 1737178.73 212.0 0 1706.9 1494.9 1495.1d Appendix A, 2009 Geotechnical Exploration Report 08-EBD-68Lf 11+54.73 3.48 508512.15 1737251.59 228.0 0 1706.9 1478.9 -- c Appendix A, 2009 Geotechnical Exploration Report 08-EBD-69Lf 12+54 94 3 85 508471 19 1737340 14 226 0 0 1706 9 1480 9 1483 1 Appendix A 2009 Geotechnical Exploration Report

Summary of Basic Information from Boring Logs

08-EBD-69L 12+54.94 3.85 508471.19 1737340.14 226.0 0 1706.9 1480.9 1483.1 Appendix A, 2009 Geotechnical Exploration Report 08-EBD-70Lf 17+54.69 3.61 508227.18 1737776.26 205.0 0 1707.0 1502.0 1506.0 Appendix A, 2009 Geotechnical Exploration Report 08-EBD-71 6+52.32 -101.40 508857.51 1736865.76 240.2 0 1706.6 1466.4 1704.6 Appendix A, 2009 Geotechnical Exploration Report 08-EBD-72 6+65.05 15.75 508749.08 1736819.62 203.0 0 1707.3 1504.3 1707.3 Appendix A, 2009 Geotechnical Exploration Report 08-EBD-73 6+70.29 58.10 508709.57 1736803.49 270.0 0 1707.8 1437.8 1706.7 Appendix A, 2009 Geotechnical Exploration Report 08-EBD-74 12+41.15 132.34 508365.83 1737265.26 246.5 0 1646.6 1400.1 1480.3 Appendix A, 2009 Geotechnical Exploration Report 08-EBD-75 12+59.05 133.10 508356.42 1737280.51 96.0 0 1646.3 1550.3 -- c Appendix A, 2009 Geotechnical Exploration Report 08-EBD-76 12+41.79 233.00 508277.69 1737216.63 126.7 0 1605.5 1478.8 1479.5 Appendix A, 2009 Geotechnical Exploration Report 08-EBD-77 12+60.77 232.53 508268.83 1737233.42 152.0 0 1646.0 1494.0 -- c Appendix A, 2009 Geotechnical Exploration Report 08-EBD-78g 17+69.60 131.92 508107.94 1737726.57 152.0 0 1645.7 1494.0 1507.5 Appendix A, 2009 Geotechnical Exploration Report 08-EBD-78Ag 17+69.65 131.90 508122.00 1737700.00 222.0 0 1645.7 1423.7 1506.7 Appendix A, 2009 Geotechnical Exploration Report 08-EBD-79 17+59.17 132.29 508112.72 1737717.24 36.0 0 1645.7 1609.7 -- c Appendix A, 2009 Geotechnical Exploration Report 08-EBD-80 17+39.60 230.98 508036.18 1737651.93 101.1 0 1606.2 1505.1 1508.2 Appendix A, 2009 Geotechnical Exploration Report 08 EBD 81 17+60 38 232 44 508024 75 1737669 35 78 0 0 1605 7 1527 7 c Appendi A 2009 Geotechnical E ploration Report08-EBD-81 17+60.38 232.44 508024.75 1737669.35 78.0 0 1605.7 1527.7 -- c Appendix A, 2009 Geotechnical Exploration Report 10-EBD-82 8+60.40 30.38 508640.72 1736982.83 98.0 0 11696.7 11598.7 -- c Appendix A, 2010 Instrumentation Installation Report 10-EBD-83 8+68.93 11.19 508653.43 1736999.72 117.3 0 1705.9 1588.6 -- c Appendix A, 2010 Instrumentation Installation Report 12-EBD-84 --b --b 508517.53 1737245.37 215.0 0 1706.6 1491.6 -- c Appendix D, 2012 Geotechnical Data Report 12-EBD-85 --b --b 507994.48 1737022.13 35.0 0 1532.3 1497.3 -- c Appendix D, 2012 Geotechnical Data Report 12-EBD-86 --b --b 508385.29 1737473.48 125.0 0 1704.9 1507.9 -- c Appendix D, 2012 Geotechnical Data Report 12-EBD-87 --b --b 508381.36 1737483.12 145.0 0 1705.4 1560.1 -- c Appendix D, 2012 Geotechnical Data Report 12-EBD-88 --b --b 508302.35 1737624.38 197.0 0 1705.9 1580.4 -- c Appendix D, 2012 Geotechnical Data Report 12-EBD-89 --b --b 508300.45 1737627.77 204.0 0 1705.8 1501.8 1505.8 Appendix D, 2012 Geotechnical Data Report 12-EBD-90 --b --b 508229.31 1737755.52 196.0 0 1705.9 1509.3 -- c Appendix D, 2012 Geotechnical Data Report 12-EBD-91 --b --b 508146.22 1737914.31 160.0 0 1706.3 1546.1 1549.3 Appendix D, 2012 Geotechnical Data Report 12-EBD-92 --b --b 508075.62 1738030.11 140.0 0 1706.4 1565.6 -- c Appendix D, 2012 Geotechnical Data Report 10-EBD-I1 8+14.71 30.12 5086633.25 1736943.13 92.0 0 1697.2 1605.2 1617.7 Appendix A, 2010 Instrumentation Installation Report f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

b Not available, see as-built drawings c Top of Rock was not noted in boring log.

d Value corresponds to top of grout cap from boring log.

e Boring 90-EBD-47 was abandoned and piezometer is located in boring 90-EBD-47A g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

10-EBD-I2 8+58.81 -18.76 508677.67 1737001.41 122.0 0 1706.1 1574.1 1586.0 Appendix A, 2010 Instrumentation Installation Report D-77-1 21+19 -75 --b --b 84.7 0 1679.5 1593.8 1594.5 As-Built Drawing O38b-U1-10/32 D-77-2 23+10 -60 --b --b 90.7 0 1690.3 1599.6 1658.2 As-Built Drawing O38b-U1-10/32 D-77-3 10+70 624 --b --b 51.0 0 1530.7 1479.7 1491.7 As-Built Drawing O38b-U1-10/32 E-1 8+20 0 --b --b 101.0 0 1707.1 1606.1 1607.6d As-Built Drawing O38b-U1-10/31 E-2 8+30 0 --b --b 106.8 0 1707.0 1600.2 1601.3d As-Built Drawing O38b-U1-10/31 E-3 8+40 0 --b --b 120.0 0 1707.0 1587.0 1588.6d As-Built Drawing O38b-U1-10/31 E-4 9+35 0 --b --b 174.0 0 1707.2 1533.2 1535.0d As-Built Drawing O38b-U1-10/31 E-5 11+05 0 --b --b 211 5 0 1706 9 1495 4 -- c As-Built Drawing O38b-U1-10/31

Summary of Basic Information from Boring Logs

E-5 11+05 0 -- -- 211.5 0 1706.9 1495.4 -- As-Built Drawing O38b-U1-10/31 E-6 8+45 18 --b --b 112.2 0 1706.3 1594.1 -- c As-Built Drawing O38b-U1-10/38 E-7 8+37 18 --b --b 109.0 0 1706.6 1597.6 -- c As-Built Drawing O38b-U1-10/38 E-8 8+30 18 --b --b 102.3 0 1706.5 1604.2 -- c As-Built Drawing O38b-U1-10/38 E-9 8+48 10 --b --b 113.9 0 1705.8 1591.9 -- c As-Built Drawing O38b-U1-10/38 E-10 8+38 8 --b --b 106.0 0 1707.0 1601.0 -- c As-Built Drawing O38b-U1-10/38 E-11 8+31 8.5 --b --b 100.0 0 1706.7 1606.7 -- c As-Built Drawing O38b-U1-10/38 E-12 8+43 1 --b --b 115.7 0 1707.0 1591.3 -- c As-Built Drawing O38b-U1-10/39 E-13 8+38 1 --b --b 115.0 0 1707.0 1592.0 -- c As-Built Drawing O38b-U1-10/39 E-14 8+31 1 --b --b 109.2 0 1707.0 1597.8 -- c As-Built Drawing O38b-U1-10/39 E-15 8+26 1 --b --b 103.4 0 1707.0 1603.6 -- c As-Built Drawing O38b-U1-10/39 E-16 8+21 1 --b --b 99.2 0 1707.0 1607.8 -- c As-Built Drawing O38b-U1-10/40 E-17 8+35 -9 --b --b 106.0 0 1706.7 1600.7 -- c As-Built Drawing O38b-U1-10/40 E 18 8+30 9 b b 106 1 0 1706 8 1600 7 c As B ilt Dra ing O38b U1 10/40E-18 8+30 -9 --b --b 106.1 0 1706.8 1600.7 -- c As-Built Drawing O38b-U1-10/40 E-19 8+25 -9 --b --b 102.2 0 1706.9 1604.7 -- c As-Built Drawing O38b-U1-10/40 ED-20 10+50 5 --b --b 76.7 0 1706.9 1630.2 -- c As-Built Drawing O38b-U1-10/41 ED-20A 10+55 5 --b --b 21.8 0 1706.9 1685.1 -- c As-Built Drawing O38b-U1-10/41 E-22 8+13 1 --b --b 95.5 0 1707.0 1611.5 -- c As-Built Drawing O38b-U1-10/41 E-23 8+51 1 --b --b 119.9 0 1707.0 1587.1 1587.2d As-Built Drawing O38b-U1-10/41 E-24 8+29.9 -4 508686.000 1736973.000 102.5 0 1707.0 1604.5 1605.0d Appendix A, 2009 Geotechnical Exploration Report E-25 8+25.1 1.5 508683.000 1736966.000 100.8 0 1707.1 1606.3 1607.1d Appendix A, 2009 Geotechnical Exploration Report E-26 8+32.2 4.7 508677.000 173971.000 102.1 0 1707.0 1604.9 1605.0d Appendix A, 2009 Geotechnical Exploration Report E-27 11+56.70 -31.34 508549.947 1737271.475 349.0 0 1696.7 1347.7 1481.5 Appendix A, 2011 Geotechnical Exploration Report E-27A 11+58.30 -35 508552.668 1737275.119 116.5 0 1695.5 1579.0 -- c Appendix A, 2011 Geotechnical Exploration Report E-28 19+15.72 -9.98 508160.360 1737923.329 106.5 0 1706.3 1599.8 -- c Appendix A, 2011 Geotechnical Exploration Report E-29 21-55.51 -10.15 508042.825 1738132.511 306.5 0 1706.6 1400.1 1610.4 Appendix A, 2011 Geotechnical Exploration Report f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

d Value corresponds to top of grout cap from boring log.

e Boring 90-EBD-47 was abandoned and piezometer is located in boring 90-EBD-47A g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Not available, see as-built drawings

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

E-30 19+55.33 209.95 507948.865 1737850.269 230.0 0 1626.6 1396.6 1548.1 Appendix A, 2011 Geotechnical Exploration Report E-31 16+27.06 360.89 507978.217 1737490.336 222.5 0 1571.8 1349.3 1502.1 Appendix A, 2011 Geotechnical Exploration Report E-32 24+33.45 -655.8 508470.808 1738690.629 50.0 0 1718.2 1668.2 1696.2 Appendix A, 2011 Geotechnical Exploration Report E-33 25+77.70 -556.14 508313.353 1738767.781 50.0 0 1751.0 1701.0 1729.5 Appendix A, 2011 Geotechnical Exploration Report E-34 27+49.80 -535.2 508210.988 1738907.700 50.0 0 1787.3 1737.3 1757.6 Appendix A, 2011 Geotechnical Exploration Report E-35 25+78.89 -773.72 508502.301 1738875.173 50.0 0 1755.4 1705.4 1736.1 Appendix A, 2011 Geotechnical Exploration Report E-36 23+94.08 -999.77 508789.818 1738824.354 50.0 0 1709.5 1659.5 1669.0 Appendix A, 2011 Geotechnical Exploration Report E-37 26+26.86 -1074.95 508741.972 1739064.208 50.0 0 1757.0 1707.0 1732.8 Appendix A, 2011 Geotechnical Exploration Report E-38 27+86 56 -899 48 508510 878 1739117 970 52 6 0 1792 7 1740 1 1761 4 Appendix A 2011 Geotechnical Exploration Report

Summary of Basic Information from Boring Logs

E-38 27+86.56 -899.48 508510.878 1739117.970 52.6 0 1792.7 1740.1 1761.4 Appendix A, 2011 Geotechnical Exploration Report E-39 7+02.4 3 508741.026 1736855.021 278.0 30 1707.2 1466.4 1693.8 Appendix A, 2012 Geotechnical Exploration Report E-40 7+82.6 1.4 508703.183 1736925.677 272.8 30 1707.1 1470.2 1647.8 Appendix A, 2012 Geotechnical Exploration Report E-41 9+47.6 1.5 508622.475 1737069.598 287.7 20 1707.0 1436.7 1561.3 Appendix A, 2012 Geotechnical Exploration Report E-42 9+62.8 2 508614.644 1737082.642 288.2 0 1707.0 1418.8 1526.0 Appendix A, 2012 Geotechnical Exploration Report E-43 10+92.5 1.9 508551.269 1737195.758 288.2 0 1707.1 1418.7 1491.9 Appendix A, 2012 Geotechnical Exploration Report E-44 12+77.6 1.8 508460.927 1737357.324 288.2 0 1706.9 1418.7 1485.9 Appendix A, 2012 Geotechnical Exploration Report E-45 12+92.7 1.4 508453.931 1737370.600 297.8 20 1706.8 1427.0 1488.8 Appendix A, 2012 Geotechnical Exploration Report E-46 14+77.9 1.6 508363.154 1737532.181 288.2 0 1706.9 1418.7 1493.9 Appendix A, 2012 Geotechnical Exploration Report E-47 15+02.7 1.3 508351.287 1737554.013 307.8 20 1706.8 1417.6 1504.8 Appendix A, 2012 Geotechnical Exploration Report E-48 16+77.6 1.6 508265.621 1737706.437 206.0 0 1707.0 1501.0 1505.0 Appendix A, 2012 Geotechnical Exploration Report E-49 17+17.5 1.4 508246.252 1737741.317 213.0 20 1707.0 1506.8 1512.5 Appendix A, 2012 Geotechnical Exploration Report E-50 20+27.4 1.1 508094.982 1738011.760 277.0 30 1707.1 1467.2 1577.6 Appendix A, 2012 Geotechnical Exploration Report E 51 22+01 6 1 6 508004 091 1738173 132 217 8 20 1707 2 1502 5 1632 0 Appendi A 2012 Geotechnical E ploration ReportE-51 22+01.6 1.6 508004.091 1738173.132 217.8 20 1707.2 1502.5 1632.0 Appendix A, 2012 Geotechnical Exploration Report E-52 22+87.6 1.4 507967.550 1738238.740 193.4 0 1707.1 1513.7 1650.6 Appendix A, 2012 Geotechnical Exploration Report E-53 23+46.3 -109 508034.168 1738344.373 184.6 0 1703.3 1518.7 1663.3 Appendix A, 2012 Geotechnical Exploration Report E-54 23+79.4 -263.5 508153.756 1738448.173 157.6 20 1673.9 1525.8 1668.4 Appendix A, 2012 Geotechnical Exploration Report E-55 24+04.5 -327.6 508197.531 1738501.540 167.3 30 1673.6 1528.7 1669.3 Appendix A, 2012 Geotechnical Exploration Report E-56 24+42.2 -422.4 508261.715 1738580.733 181.0 40 1674.0 1535.3 1672.9 Appendix A, 2012 Geotechnical Exploration Report E-57 19+15.7 1.3 508149.461 1737914.283 308.1 0 1707.1 1399.0 1550.1 Appendix A, 2012 Geotechnical Exploration Report E-58 15+85 1.5 --b --b 317.8 20 1707.0 1408.4 1504.0 Appendix A, 2012 Geotechnical Exploration Report E-59 18+05 1.5 --b --b 308.2 0 1707.0 1398.8 1512.0 Appendix A, 2012 Geotechnical Exploration Report E-60 --b --b 508421 1739221 80.0 0 1830.0 1750.0 1824.0 Appendix D, 2012 Geotechnical Data Report E-61 --b --b 508137 1739045 80.0 0 1830.0 1750.0 1800.0 Appendix D, 2012 Geotechnical Data Report E-62 --b --b 508258 1739130 70.0 0 1825.0 1755.0 1805.0 Appendix D, 2012 Geotechnical Data Report EB-1 23+26.33 4.4 --b --b 122.6 31 1707.4 1584.8 1666.1 Appendix A, 1998 Left Abutment Seepage Evaluation Report f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A a Positive offset refers to downstream, negative offset refers to upstream b Not available, see as-built drawings c Top of Rock was not noted in boring log.

d Value corresponds to top of grout cap from boring log.

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

EB-2 22+40.64 4.9 --b --b 128.1 31 1707.2 1579.1 1644.9 Appendix A, 1998 Left Abutment Seepage Evaluation Report Q-1 8+05 0 --b --b 72.0 0 1706.7 1634.7 -- c Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-2 8+05 4 --b --b 90.6 0 1706.7 1616.1 1616.4d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-3 8+08 -25 --b --b 82.0 0 1700.0 1618.0 1618.0 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-4 8+13 -25 --b --b 86.0 0 1700.2 1614.2 1614.2 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-5 8+15 0 --b --b 95.4 0 1706.7 1611.3 1611.3d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-6 8+15 3.5 --b --b 98.1 0 1706.7 1608.6 1608.7d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-7 8+15 -5 --b --b 96.3 0 1706.7 1610.4 1610.4d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-8 8+20 0 --b --b 98 4 0 1706 7 1608 3 1608 7d Q-Pattern Boring Logs Emergency Work East Branch Dam May 1957

Summary of Basic Information from Boring Logs

Q-8 8+20 0 -- -- 98.4 0 1706.7 1608.3 1608.7 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-9 8+20 -15 --b --b 96.0 0 1704.2 1608.2 1608.2 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-10 8+20 -25 --b --b 89.0 0 1700.0 1611.0 1611.0 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-11 8+25 0 --b --b 102.1 0 1706.7 1604.6 1604.6d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-12 8+25 40 --b --b 95.0 0 1691.5 1596.5 1611.5 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-13 8+25 -6 --b --b 102.9 0 1706.7 1603.8 1603.8d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-14 8+30 0 --b --b 103.9 0 1706.7 1602.8 1602.8d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-15 8+30 -5 --b --b 93.0 0 1706.7 1613.7 -- c Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-16 8+30 10 --b --b 103.6 0 1706.1 1602.5 1602.8 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-17 8+30 -15 --b --b 97.5 0 1702.7 1605.2 1605.7 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-18 8+30 20 --b --b 105.0 0 1701.0 1596.0 1610.3 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-19 8+30 -25 --b --b 91.0 0 1699.7 1608.7 1609.7 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-20 8+30 40 --b --b 100.0 0 1691.4 1591.4 -- c Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q 21 8+35 0 b b 112 1 0 1706 7 1594 6 1594 6d Q Pattern Boring Logs Emergenc Work East Branch Dam Ma 1957Q-21 8+35 0 --b --b 112.1 0 1706.7 1594.6 1594.6d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-22 8+35 4 --b --b 110.0 0 1706.7 1596.7 1596.7d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-23 8+35 9 --b --b 107.0 0 1706.5 1599.5 -- c Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-24 8+35 19 --b --b 104.0 0 1701.4 1597.4 1597.9 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-25 8+35 40 --b --b 102.0 0 1691.2 1589.2 1605.4 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-26 8+37 29 --b --b 95.6 0 1696.4 1600.8 1600.8 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-27 8+40 -15 --b --b 108.4 0 1704.5 1596.1 1596.4 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-28 8+40 20 --b --b 100.3 0 1700.8 1600.5 -- c Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-29 8+40 39 --b --b 91.6 0 1691.9 1600.3 1600.3 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-30 8+42 -10 --b --b 115.6 0 1706.2 1590.6 1591.2 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-31 8+45 0 --b --b 118.5 0 1707.4 1588.9 1589.4d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-32 8+45 4.25 --b --b 118.5 0 1706.7 1588.2 1588.2d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-33 8+45 -5 --b --b 117.2 0 1706.7 1589.5 1589.7 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

c Top of Rock was not noted in boring log.

d Value corresponds to top of grout cap from boring log.

e Boring 90-EBD-47 was abandoned and piezometer is located in boring 90-EBD-47A g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A

Note: All Elevations are in NAVD 88 b Not available, see as-built drawings

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

Q-34 8+45 9.5 --b --b 119.8 0 1706.2 1586.4 1586.4 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-35 8+45 39 --b --b 96.0 0 1691.8 1595.8 1595.8 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-36 8+46 19 --b --b 110.0 0 1701.3 1591.3 1591.7 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-37 8+50 29 --b --b 107.0 0 1699.2 1592.2 1593.2 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-38 8+50 39 --b --b 98.0 0 1691.7 1593.7 1594.1 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-39 8+55 39 --b --b 102.0 0 1691.8 1589.8 1590.0 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-40 8+60 29 --b --b 110.5 0 1696.7 1586.2 1586.7 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-41 8+60 39 --b --b 112.5 0 1690.7 1578.2 -- c Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-42 8+65 49 --b --b 103 4 0 1686 9 1583 5 1583 5 Q-Pattern Boring Logs Emergency Work East Branch Dam May 1957

Summary of Basic Information from Boring Logs

Q-42 8+65 49 -- -- 103.4 0 1686.9 1583.5 1583.5 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-43 8+70 39 --b --b 108.4 0 1691.6 1583.2 -- c Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-44 8+75 4 --b --b 133.3 0 1706.7 1573.4 1573.4d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-45 8+75 59 --b --b 104.0 0 1682.0 1578.0 1578.5 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-46 8+85 69 --b --b 100.0 0 1676.8 1576.8 1576.8 Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-47 9+00 0 --b --b 145.6 0 1706.7 1561.1 1561.1d Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-48 9+50 0 --b --b 146.0 0 1706.7 1560.7 -- c Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 Q-49 10+00 0 --b --b 103.5 0 1706.7 1603.2 -- c Q-Pattern Boring Logs, Emergency Work, East Branch Dam, May 1957 R-1 508984.526 1733088.277 5.0 0 1829.7 1824.7 -- c Appendix A, 2011 Geotechnical Exploration Report R-2 509013.892 1733998.297 5.0 0 1852.1 1847.1 -- c Appendix A, 2011 Geotechnical Exploration Report R-3 509099.673 1735115.001 5.0 0 1850.1 1845.3 -- c Appendix A, 2011 Geotechnical Exploration Report R-4 509180.843 1736510.816 5.0 0 1843.7 1838.7 -- c Appendix A, 2011 Geotechnical Exploration Report R-5 509855.133 1737142.497 5.0 0 1779.8 1774.8 -- c Appendix A, 2011 Geotechnical Exploration Report R 6 509640 625 1737231 763 5 0 0 1725 6 1722 1 c Appendi A 2011 Geotechnical E ploration Report

N/A Dam Axis Road

R-6 509640.625 1737231.763 5.0 0 1725.6 1722.1 -- c Appendix A, 2011 Geotechnical Exploration Report X-1 8+16.2 -2.5 --b --b 97.3 0 1706.7 1609.4 1609.4d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-2 8+18.7 -2.5 --b --b 99.0 0 1706.7 1607.7 1607.7d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-3 8+21.2 -2.5 --b --b 102.8 0 1706.7 1603.9 1605.7d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-4 8+23.7 -2.5 --b --b 105.6 0 1706.7 1601.1 1601.7d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-5 8+26.2 -2.5 --b --b 105.7 0 1706.7 1601.0 1601.3d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-6 8+28.7 -2.5 --b --b 79.0 0 1706.7 1627.7 1628.7d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-6A 8+28.7 -3.5 --b --b 103.0 0 1706.7 1603.7 -- c X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-7 8+31.2 -2.5 --b --b 105.0 0 1706.7 1601.7 1602.9d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-8 8+33.7 -2.5 --b --b 101.0 0 1706.7 1605.7 1605.7d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-9 8+36.2 -2.5 --b --b 116.3 0 1706.7 1590.4 1590.4d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-10 8+38.7 -2.5 --b --b 112.0 0 1706.7 1594.7 1594.7d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 X-11 8+41.2 -2.5 --b --b 115.2 0 1706.7 1591.5 1591.5d X-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 f Boring logs are from sampled sonic core borings. Unsampled borings for piezometers are located approximately 8 ft downstream of the sonic boring.

e Boring 90-EBD-47 was abandoned and piezometer is located in boring 90-EBD-47A g Piezometer 08 EBD-78 is located in boring labeled 08-EBD-78A

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Not available, see as-built drawings

(Length)

Angle from Vertical (degrees)

Surface

EL

Bottom

EL

Top of Rock EL Data Reference

Y-1 8+16.2 2.5 --b --b 97.4 0 1706.7 1609.3 1610.7d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-2 8+18.7 2.5 --b --b 98.6 0 1706.7 1608.1 1608.7d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-3 8+21.2 2.5 --b --b 100.1 0 1706.7 1606.6 1607.2d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-4 8+23.7 2.5 --b --b 102.0 0 1706.7 1604.7 1605.1d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-5 8+26.2 2.5 --b --b 102.6 0 1706.7 1604.1 1605.58d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-6 8+28.7 2.5 --b --b 102.7 0 1706.7 1604.0 1604.0d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-7 8+31.2 2.5 --b --b 101.5 0 1706.7 1605.2 1605.2d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-8 8+33.7 2.5 --b --b 105.0 0 1706.7 1601.7 1603.0d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-9 8+36 2 2 5 --b --b 112 7 0 1706 7 1594 0 1594 0d Y-Line Boring Logs Emergency Work East Branch Dam May 1957

Summary of Basic Information from Boring Logs

Y-9 8+36.2 2.5 -- -- 112.7 0 1706.7 1594.0 1594.0 Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-10 8+38.7 2.5 --b --b 113.5 0 1706.7 1593.2 1593.2d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Y-11 8+41.2 2.5 --b --b 117.8 0 1706.7 1588.9 1588.9d Y-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-1 8+38 74 --b --b 80.2 0 1682.7 1602.5 1602.5 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-1A 8+40 80 --b --b 71.0 0 1680.3 1609.3 1609.9 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-2 8+42 75.5 --b --b 78.5 0 1681.6 1603.1 1603.3 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-3 8+46.5 77.5 --b --b 89.4 0 1680.4 1591.0 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-4 8+50 79 --b --b 95.0 0 1679.7 1584.7 1584.9 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-5 8+54.5 81 --b --b 95.0 0 1678.8 1583.8 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-6 8+59 83 --b --b 100.0 0 1677.9 1577.9 1594.2 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-7 8+63.5 85 --b --b 86.0 0 1677.1 1591.1 1592.1 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-8 8+67.5 86.5 --b --b 85.0 0 1676.3 1591.3 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-9 8+72 88 --b --b 94.0 0 1674.9 1580.9 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z 10 8+75 89 5 b b 87 0 0 1673 8 1586 8 1586 8 Z Line Boring Logs Emergenc Work East Branch Dam Ma 1957Z-10 8+75 89.5 --b --b 87.0 0 1673.8 1586.8 1586.8 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-10A 8+77 95.5 --b --b 93.1 0 1670.9 1577.8 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-11 8+79.5 91.5 --b --b 98.0 0 1672.7 1574.7 1574.7 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-11A 8+82 97.5 --b --b 98.4 0 1670.1 1571.7 1571.7 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-12 8+84.25 93.5 --b --b 90.3 0 1671.8 1581.5 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-12A 8+86.5 99.5 --b --b 97.3 0 1669.1 1571.8 1572.1 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-13 8+89 95 --b --b 91.0 0 1671.2 1580.2 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-13A 8+91 101 --b --b 115.5 0 1668.3 1552.8 1555.3 Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-14 8+93 97 --b --b 90.0 0 1670.1 1580.1 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-14A 8+94.5 102.5 --b --b 96.7 0 1667.6 1570.9 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-15 8+96.5 98.5 --b --b 100.0 0 1669.5 1569.5 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-15A 8+98 104 --b --b 103.5 0 1667.0 1563.5 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 Z-16 9+00 100 --b --b 98.1 0 1668.7 1570.6 -- c Z-Line Boring Logs, Emergency Work, East Branch Dam, May 1957 f Boring logs are from sampled sonic core borings.