Certified_Final_Tech_Specs_Volume_2H_-_GBR_Appendix_H.pdf

W911WN-13-R-0002

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

Certified Final Document Volume 2H – Geotechnical Baseline Report, Appendix H April 2013

Appendix H

Grouted Void Data

Exploratory Borings and Grouting, 1957 Emergency Repair: Basic information reported in the 1957 Emergency Repair Report is included in this section. A series of exploratory holes were drilled to ascertain the location of the suspected void as well as the location of the seepage path.

Generally, these borings do not have boring logs; however, the logs from selected exploratory holes are part of the Q-Series of boring logs. This table notes the relative location of each boring (station and offset), the top of the boring, the top of rock, and the bottom of the boring. The number of bags of grout used during grouting is also noted. This information was extracted from the 1957 Emergency Repair Report. These borings are shown on As-Built Drawing 038b-U1- 10/30 along with the number of bags of grout used to fill each boring. Reference GBR drawing 038b-U1-10/113 which highlights borings with high grout takes during the 1957 repair.

Consolidation Grouting: As part of the 1957 Repair, consolidation grouting was performed between Stations 7+90 and 8+70. Consolidation Grouting was generally performed on five foot spacing in this section, between 25 foot upstream and 25 ft downstream. Consolidation grouting is shown on As-Built Drawing 038b-U1-40/59. Basic information extracted from the 1957 Emergency Repair Report is tabulated including the relative location of each boring (station and offset), the top of the boring, the bottom of the boring, and the number of bags of grout used during consolidation grouting is also noted for each boring. The top of rock was not encountered in any of the consolidation borings. Reference GBR drawing 038b-U1-10/113 which highlights borings with high grout takes during the 1957 repair.

Grouted Void Dimensions: As-Built Drawing 038b-U1-40/63 shows the interpretation of the geometry of the grouted void in plan, profile, and cross section views. Reference GBR drawings 038b-U1-10/113-115, as shown in Appendix B, for additional information.

Grout Core Tests: Seven core samples were extracted from Borings E-24 and E-25 during the 2009 Geotechnical Exploration. Samples were subjected to unconfined compressive strength testing. The results of these tests are tabulated.

Exploratory Borings and Grouting 1957 Emergency Repair

Station Offseta Elevation

T/Hole Elevation

B/Hole Elevation T/Rock

Number of Stages

Number of Bags Grout

8+15 3.5 1706.7 1608.7 1609.5 1 --b

8+25 0 1706.7 1604.6 1604.6 2 963 8+25 -6 1706.7 1603.8 1603.8 1 --c

8+15 0 1706.7 1611.3 1611.3 1 6 8+05 4 1706.7 1616.1 1616.1 1 --b

8+15 -5 1706.7 1610.4 1610.4 1 5 9+00 0 1706.7 1561.1 1561.1 1 17 8+05 0 1706.7 1634.7 --d 1 15 8+75 4 1706.7 1573.4 1573.4 1 14 10+00 0 1706.7 1603.2 --d 1 23 8+35 4 1706.7 1596.7 1596.7 1 --c

8+20 0 1706.7 1608.5 1608.3 1 --c

9+50 0 1706.7 1561.7 --d 1 10 8+30 -5 1706.7 1613.7 --d 2 3e

8+30 -15 1702.7 1605.2 1605.2 1 11 8+30 0 1706.7 1602.8 1602.8 1 --c

8+30 10 1706.1 1602.5 1602.8 1 --b

8+35 0 1706.7 1594.5 1594.5 2 --c

8+45 -5 1706.7 1589.5 1589.5 1 5.5 8+35 9 1706.5 1599.5 1599.8 1 6 8+30 25 1699.7 1608.7 1609.7 1 35 8+20 -15 1704.2 1608.2 1608.2 1 25 8+45 0 1706.7 1603.7 --d 1 5.5 8+35 9.5 1706.2 1587.3 1586.8 1 13 8+20 -25 1700.0 1611.5 1611.5 1 116 8+45 4.2 1706.7 1588.2 1588.2 1 8 8+42 -10 1706.2 1590.6 1591.2 1 13 8+13 -25 1700.2 1614.2 1614.6 1 25 8+40 -15 1704.5 1596.1 1596.4 1 7 8+37 29 1696.4 1600.7 1601.4 1 20 8+08 -25 1700.0 1618.0 1618.2 1 6 8+65 4.5 1706.7 1595.0 --d 1 16 8+45 39 1691.8 1595.8 1596.7 1 4 8+13.5 -30.5 1697.4 1613.0 1613.4 1 10 8+20 -30 1697.8 1613.0 1613.5 1 6 8+15.5 -35.5 1697.8 1614.8 1615.7 1 10 8+25 -25.5 1699.7 1605.7 1606.0 1 7 8+25 -35 1696.9 1604.8 1605.3 1 10 c Interflow between Borings was reported. Grout take was not reported.

a Positive offset refers to downstream, negative offset refers to upstream Note: All Elevations are in NAVD 88 b Grouted As Part of Pattern Grouting d T/Rock was not encountered in boring.

e Second Stage was in in void, bags of cement was not recorded.

f Grout take was not reported.

g Hole filled with sand instead of grout.

T/Hole Elevation

B/Hole Elevation T/Rock

Number of Stages

Number of Bags Grout

8+24 -47 1690.5 1606.0 1606.7 1 6 8+20 -40 1695.4 1609.4 1610.0 1 13 8+25 -57 1686.2 1604.6 1604.7 1 6 8+20 -50 1691.9 1608.7 1607.7 1 10 8+09 -57 1688.4 1612.9 1613.5 1 10 8+40 0 1706.7 1591.5 1591.5 1 --b

8+09 -67 1684.8 1611.3 1612.4 1 20 8+35 4 1706.7 1608.7 --d 1 --c

8+16 -61 1686.6 1610.6 1610.8 1 6 8+09 -76 1680.2 1611.9 1612.2 1 5 8+30 4.5 1706.7 1621.1 --d 1 --c

8+16 -69 1683.3 1609.5 1609.9 1 348 8+08 -86 1679.5 1613.0 1614.0 1 5 8+25 3.5 1706.7 1604.2 1604.2 1 --c

8+16 -79 1679.8 1609.5 1610.1 1 32 8+08.5 -96 1672.3 1609.1 1609.6 1 178 8+20 4.5 1706.7 1609.1 1609.1 1 --b

8+13 -89 1676.7 1608.3 1608.7 1 15 8+09.5 -106 1671.7 1591.7 -0.3 1 15 8+35 -5 1706.7 1618.5 -0.3 1 --c

8+25 -109.5 1672.1 1607.1 1607.8 1 5 8+15 -127 1663.8 1606.3 1606.8 1 394 8+25 -20 1701.8 1609.8 1610.7 1 --f

8+25 -119.5 1667.7 1602.1 1603.6 1 26 8+15 -137 1658.5 1614.5 --d 1 4 8+13 -137 1659.8 1609.0 1609.2 1 6 8+20 -25 1700.0 1611.0 1611.5 1 116 8+25 -129.5 1663.8 1600.9 1601.3 1 13 8+15 -148 1657.1 1606.6 1607.1 1 28 8+25 -139.5 1660.1 1602.2 1602.5 1 206 8+15 -158 1653.2 1607.0 1607.2 1 379 8+35 -15 1704.6 1601.6 1601.8 1 --f

8+25 -149 1657.5 1601.9 1602.2 1 30 8+15 -168 1650.9 1597.4 1597.4 1 28 8+25 -159.5 1653.5 1601.3 1601.8 1 4 8+00 -170 1650.0 1611.5 1611.5 1 16 7+99 -180 1647.9 1612.2 1612.4 1 23 8+13.5 -159.5 1653.9 1600.0 1600.0 1 10 d T/Rock was not encountered in boring.

e Second Stage was in in void, bags of cement was not recorded.

f Grout take was not reported.

g Hole filled with sand instead of grout.

c Interflow between Borings was reported. Grout take was not reported.

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Grouted As Part of Pattern Grouting

T/Hole Elevation

B/Hole Elevation T/Rock

Number of Stages

Number of Bags Grout

8+05 -169.5 1650.4 1608.5 1608.8 1 30 7+90 -180 1647.9 1609.6 --d 1 20 8+05 -160 1653.2 1611.2 1611.7 1 80 8+10 -181 1647.6 1607.2 1607.6 1 268 8+10 -153 1656.0 1598.9 --d 1 9 8+26 -180 1646.9 1597.9 1598.4 1 216 8+20 -154 1655.2 1601.6 1602.0 1 90 8+30 -180 1647.3 1596.8 1597.0 1 1366 8+20 -160 1654.2 1599.5 1599.9 1 7 8+35 -180 1646.9 1590.5 --d 1 9 8+30 -140 1661.2 1601.8 1602.2 1 24 8+30 -180 1647.8 1596.8 1597.1 1 35 8+20 -140 1661.0 1603.2 1603.3 1 8 8+27.5 -180 1647.3 1588.0 1588.2 1 1250 8+25 -145 1660.7 1603.4 1603.4 1 154 8+15 -180 1647.6 1607.5 1607.5 1 27 8+04 -180 1649.2 1610.0 1610.8 1 80 7+94 -180 1648.9 1608.7 1608.9 1 7 8+15 -154 1656.3 1598.0 1598.3 1 4 8+19.5 -156 1656.3 1595.9 --d 1 10 8+30 -155 1655.5 1599.1 1599.5 1 46 8+38 -151.5 1656.4 1596.0 1596.4 1 58 8+43 -155 1656.2 1584.2 1585.0 1 145 8+48 -156 1656.6 1583.6 1583.6 1 715 8+25 -135 1636.3 1602.3 --d 1 458 8+20 -130 1663.1 1580.8 1581.5 1 27 8+15 -121 1666.2 1605.5 1605.5 1 20 8+10 -127 1664.6 1600.4 1600.6 1 14 8+15 -132 1662.9 1571.8 --d 1 11 8+20 -135 1663.0 1596.5 1604.6 1 12 8+30 -135 1661.4 1596.0 --d 1 12 8+20 -127 1663.3 1604.3 1604.3 1 56 8+20 -110 1668.3 1602.0 1604.2 1 22 8+15 -105 1671.1 1610.3 1610.5 1 10 8+24 -105 1671.2 1602.3 1602.3 1 32 8+19 -100 1673.2 1604.8 1604.8 1 147 8+14 -100 1673.3 1609.2 --d 1 10 8+19 -95 1673.4 1597.4 --d 1 10 g Hole filled with sand instead of grout.

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Grouted As Part of Pattern Grouting c Interflow between Borings was reported. Grout take was not reported.

d T/Rock was not encountered in boring.

e Second Stage was in in void, bags of cement was not recorded.

f Grout take was not reported.

T/Hole Elevation

B/Hole Elevation T/Rock

Number of Stages

Number of Bags Grout

8+04 -96 1674.3 1603.8 --d 1 24 8+08 -91 1674.8 1611.1 --d 1 10 8+13 -95 1674.4 1608.4 --d 1 20 8+08 -101 1674.0 1605.1 1607.1 1 10 8+21 -69 1687.3 1600.3 --d 1 130 8+16 -74 1682.7 1600.7 --d 1 10 8+20 -181 1647.3 1601.5 1601.8 1 79 8+15 -115 1673.1 1604.7 1605.1 1 72 8+23 -89 1676.6 1607.5 1607.5 1 25 8+19 -105.5 1671.3 1603.2 1604.3 1 185 8+25 -99 1673.1 1604.7 1604.7 1 14 8+20 0 1706.7 1608.4 1608.4 1 --c

8+80 64 1679.4 1578.4 1579.4 1 8+40 39 1691.9 1599.7 1600.3 1 4 8+50 39 1691.7 1593.7 1594.3 1 4 8+46 19 1701.3 1591.3 1591.7 1 6 8+55 39 1691.8 1589.8 1590.0 1 4 8+60 39 1690.7 1578.2 --d 1 4 8+50 29 1696.7 1592.2 1593.2 1 6 8+60 29 1696.7 1586.2 1586.7 1 6 8+65 49 1686.9 1583.5 1584.5 1 --g

8+70 39 1691.6 1583.2 1585.1 1 4 8+75 59 1682.0 1578.0 1578.5 1 10 8+85 69 1676.8 1576.8 1577.0 1 --g

8+35 40 1691.2 1589.2 1605.0 1 4 8+30 40 1691.4 1591.4 --d 1 60 8+25 40 1691.5 1596.5 1611.5 1 4 8+40 20 1700.8 1600.5 1600.5 1 109 8+30 20 1701.0 1607.0 1610.3 1 17 8+40 25 1698.0 1594.0 1597.0 1 10 8+10 15 1703.5 1617.5 1619.0 1 --b

8+35 25 1698.6 1606.6 1606.9 1 4 8+20 15 1703.5 1611.0 1611.2 1 15 9+00 100 1669.8 1566.4 1566.8 1 --g

7+90 15 1703.7 1629.7 1630.2 1 --b

8+60 41 1689.8 1584.2 1584.6 1 --g f Grout take was not reported.

g Hole filled with sand instead of grout.

Note: All Elevations are in NAVD 88 a Positive offset refers to downstream, negative offset refers to upstream b Grouted As Part of Pattern Grouting c Interflow between Borings was reported. Grout take was not reported.

d T/Rock was not encountered in boring.

e Second Stage was in in void, bags of cement was not recorded.

Consolidation Grouting 1957 Emergency Repair

Name Station Offseta

T/Hole Elevation

B/Hole Number of

Stages Number of Bags

Grout

AA-6 8+15 -30 1643.7 1590.7 1 13

AA-7 8+20 -30 1698.7 1588.7 1 10

AA-8 8+25 -30 1698.7 1585.7 1 26

AA-15 8+60 -30 1697.7 1564.7 1 24

AA-16 8+65 -30 1697.4 1562.7 1 13

AA-17 8+70 -30 1697.5 1559.5 2 29

AA-18 8+75 -30 1696.8 1558.7 1 15

A-1 7+90 -25 1696.3 1604.7 4 70 A-2 7+95 -25 1696.1 1601.7 1 3 A-3 8+00 -25 1695.9 1599.7 1 6 A-4 8+05 -25 1695.7 1596.7 1 5 A-5 8+10 -25 1695.5 1594.7 1 4 A-6 8+15 -25 1695.6 1590.7 2 11 A-7 8+20 -25 1696.3 1588.7 3 397 A-8 8+25 -25 1696.2 1585.7 3 14 A-9 8+30 -25 1695.5 1577.7 3 49 A-10 8+35 -25 1695.6 1572.7 1 16 A-11 8+40 -25 1696.7 1570.7 1 17 A-12 8+45 -25 1695.5 1569.5 1 2 A-13 8+50 -25 1695.4 1568.7 2 9 A-14 8+55 -25 1695.4 1565.7 2 7 A-15 8+60 -25 1695.1 1564.7 2 9 A-16 8+65 -25 1696.1 1562.7 2 518 A-17 8+70 -25 1699.8 1559.7 2 19 A-18 8+75 -25 1697.8 1558.7 1 14 B-1 7+90 -20 1697.6 1604.7 1 3 B-2 7+95 -20 1697.5 1601.7 1 1 B-3 8+00 -20 1697.4 1599.7 1 5 B-4 8+05 -20 1697.5 1596.7 1 19 B-5 8+10 -20 1697.5 1594.7 1 2 B-6 8+15 -20 1697.3 1590.7 1 22 B-7 8+20 -20 1697.4 1588.7 1 5 B-8 8+25 -20 1697.2 1585.7 1 6 B-9 8+30 -20 1697.1 1577.7 1 20 B-10 8+35 -20 1697.2 1571.2 1 14 B-11 8+40 -20 1696.9 1570.7 1 39 B-12 8+45 -20 1697.0 1569.7 1 5 B-13 8+50 -20 1696.9 1568.7 1 5 B-14 8+55 -20 1697.0 1565.7 1 11 B-15 8+60 -20 1697.1 1564.7 1 23 b Interflow between borings observed c Not Recorded

Note: All Elevations are in NAVD 88

T/Hole Elevation

B/Hole Number of

Stages Number of Bags

Grout B-16 8+65 -20 1696.8 1562.7 1 24 B-17 8+70 -20 1699.3 1560.7 1 18 C-1 7+90 -15 1705.0 1604.7 1 29 C-2 7+95 -15 1705.5 1601.7 1 15 C-3 8+00 -15 1704.8 1599.7 1 13 C-4 8+05 -15 1704.8 1596.7 1 12 C-5 8+10 -15 1704.8 1594.7 1 12 C-6 8+15 -15 1703.7 1590.7 1 13 C-7 8+20 -15 1704.8 1588.7 1 10 C-8 8+25 -15 1705.0 1585.7 1 14 C-9 8+30 -15 1704.8 1577.7 1 16 C-10 8+35 -15 1705.5 1572.7 1 18 C-11 8+40 -15 1704.8 1570.7 1 17 C-12 8+45 -15 1704.8 1569.7 1 23 C-13 8+50 -15 1704.9 1568.7 1 19 C-14 8+55 -15 1704.8 1565.7 1 20 C-15 8+60 -15 1704.8 1565.7 1 17 C-16 8+65 -15 1704.7 1562.7 1 15 C-17 8+70 -15 1705.1 1560.7 1 16 D-1 7+90 -10 1706.2 1604.2 1 6 D-2 7+95 -10 1705.7 1601.7 1 9 D-3 8+00 -10 1705.9 1597.9 1 7 D-4 8+05 -10 1707.0 1596.0 1 16 D-5 8+10 -10 1706.7 1593.7 1 12 D-6 8+15 -10 1706.7 1590.7 1 15 D-7 8+20 -10 1706.8 1588.7 1 15 D-8 8+25 -10 1706.8 1585.7 1 10 D-9 8+30 -10 1706.7 1577.7 1 42 D-10 8+35 -10 1705.8 1572.7 1 8 D-11 8+40 -10 1706.1 1573.7 1 14 D-12 8+45 -10 1706.0 1576.7 1 15 D-13 8+50 -10 1705.7 1568.7 1 179 D-14 8+55 -10 1705.4 1565.7 1 13 D-15 8+60 -10 1705.3 1564.7 1 15 D-16 8+65 -10 1706.8 1562.7 1 19 D-17 8+70 -10 1705.7 1560.7 1 8 E-1 7+90 -5 1706.7 1604.9 1 9 E-1-A 7+92.5 -5 1706.7 1603.2 1 13 E-2 7+95 -5 1706.7 1601.7 1 7 E-2-A 7+97.5 -5 1706.7 1600.7 1 14 E-3 8+00 -5 1706.7 1599.7 1 14 b Interflow between borings observed c Not Recorded

T/Hole Elevation

B/Hole Number of

Stages Number of Bags

Grout E-3-A 8+02.5 -5 1706.7 1597.7 1 17 E-4 8+05 -5 1706.7 1596.7 1 17 E-4-A 8+07.5 -5 1706.7 1595.7 1 18 E-5 8+10 -5 1706.7 1594.7 1 9 E-5-A 8+12.5 -5 1706.7 1595.7 1 7 E-6 8+15 -5 1706.7 1590.7 1 18 E-6-A 8+17.5 -5 1706.7 1589.7 1 10 E-7 8+20 -5 1706.7 1587.7 1 15 E-7-A 8+22.5 -5 1706.7 1586.7 1 12 E-8 8+25 -5 1706.7 1585.7 1 13 E-8-A 8+27.5 -5 1706.7 1581.7 1 7 E-9 8+30 -5 1706.7 1576.7 2 51 E-9-1 8+32.5 -5 1706.7 1575.2 1 7 E-10 8+35 -5 1706.7 1572.7 1 3 E-10-A 8+37.5 -5 1706.7 1571.7 1 9 E-11 8+40 -5 1706.7 1570.7 1 21 E-11-A 8+42.5 -5 1706.7 1570.2 1 7 E-12 8+45 -5 1706.7 1569.7 2 145 E-12-A 8+47.5 -5 1706.7 1570.2 1 16 E-13 8+50 -5 1706.7 1568.7 1 502 E-13-A 8+52.5 -5 1706.7 1567.2 1 14 E-14 8+55 -5 1706.7 1570.2 1 14 E-14-A 8+57.5 -5 1706.7 1564.7 1 21 E-15 8+60 -5 1706.7 1564.7 1 23 E-15-A 8+62.5 -5 1706.7 1563.7 1 32 E-16 8+65 -5 1706.7 1562.7 1 4 E-16-A 8+67.5 -5 1706.7 1561.7 1 13 E-17 8+70 -5 1706.7 1560.7 1 20 F-1 7+90 0 1706.7 1605.2 1 13 F-2 7+95 0 1706.7 1601.7 1 12 F-3 8+00 0 1706.7 1615.2 1 13 F-4 8+05 0 1706.7 1596.7 1 11 F-5 8+10 0 1706.7 1594.7 1 10 F-6 8+15 0 1706.7 1590.7 1 21 F-7 8+20 0 1706.7 1588.7 1 --b

F-8 8+25 0 1706.7 1609.7 1 --b

F-9 8+30 0 1706.7 1610.3 1 --b

F-11 8+40 0 1706.7 1570.7 1 24 F-12 8+45 0 1706.7 1569.7 1 13 F-13 8+50 0 1706.7 1568.7 1 13 b Interflow between borings observed c Not Recorded

T/Hole Elevation

B/Hole Number of

Stages Number of Bags

Grout F-14 8+55 0 1706.7 1565.7 1 57 F-15 8+60 0 1706.7 1564.7 1 13 F-16 8+65 0 1706.7 1562.7 1 35 F-17 8+65 0 1706.7 1559.7 1 16 G-1 7+90 5 1706.7 1605.2 1 9 G-1-A 7+92.5 5 1706.7 1603.2 1 8 G-2 7+95 5 1706.7 1601.7 1 10 G-2-A 7+97.5 5 1706.7 1600.7 1 11 G-3 8+00 5 1706.7 1599.7 1 12 G-3-A 8+02.5 5 1706.7 1598.2 1 9 G-4 8+05 5 1706.7 1596.7 1 20 G-4-A 8+07.5 5 1706.7 1595.7 1 11 G-5 8+10 5 1706.7 1594.7 1 11 G-5-A 8+12.5 5 1706.7 1592.7 1 12 G-6 8+15 5 1706.7 1590.7 1 37 G-6-A 8+17.5 5 1706.7 1589.7 1 18 G-7 8+20 5 1706.7 1584.7 1 5 G-7-A 8+22.5 5 1706.7 1587.2 1 13 G-8 8+25 5 1706.7 1585.7 1 12 G-8-A 8+27.5 5 1706.7 1581.7 1 12 G-9 8+30 5 1706.7 1577.7 1 6 G-9-A 8+32.5 5 1706.7 1575.2 1 11 G-10 8+35 5 1706.7 1572.7 1 16 G-10-A 8+37.5 5 1706.7 1571.7 1 9 G-11 8+40 5 1706.7 1570.7 1 15 G-11-A 8+42.5 5 1706.7 1570.2 1 10 G-12 8+45 5 1706.7 1569.7 1 14 G-12-A 8+47.5 5 1706.7 1568.7 1 17 G-13 8+50 5 1706.7 1568.7 1 15 G-13-A 8+52.5 5 1706.7 1567.7 1 14 G-14 8+55 5 1706.7 1565.7 1 11 G-14-A 8+57.5 5 1706.7 1565.7 1 16 G-15 8+60 5 1706.7 1564.7 1 10 G-15-A 8+62.5 5 1706.7 1564.7 1 13 G-16 8+65 5 1706.7 1562.7 1 15 G-16-A 8+67.5 5 1706.7 1561.7 1 8 G-17 8+70 5 1706.7 1566.9 1 10 H-1 7+90 10 1706.0 1604.7 1 13 H-2 7+95 10 1706.0 1601.7 1 10 H-3 8+00 10 1706.1 1598.7 1 10 H-4 8+05 10 1706.1 1597.7 1 14 b Interflow between borings observed c Not Recorded

T/Hole Elevation

B/Hole Number of

Stages Number of Bags

Grout H-5 8+10 10 1705.9 1593.9 1 15 H-6 8+15 10 1706.0 1590.7 1 15 H-7 8+20 10 1706.0 1588.7 1 13 H-8 8+25 10 1705.7 1585.7 1 10 H-9 8+30 10 1705.8 1577.7 1 17 H-11 8+40 10 1705.9 1570.7 1 4 H-12 8+45 10 1705.9 1569.7 1 12 H-13 8+50 10 1706.1 1568.7 1 9 H-14 8+55 10 1705.6 1564.9 1 15 H-15 8+60 10 1705.9 1564.7 1 7 H-16 8+65 10 1705.9 1562.7 1 14 H-17 8+70 10 1705.9 1560.7 1 8 J-1 7+90 15 1703.7 1604.7 2 115 J-2 7+95 15 1703.6 1601.7 2 25 J-3 8+00 15 1703.6 1601.7 2 26 J-4 8+05 15 1703.6 1596.7 1 2 J-5 8+10 15 1703.1 1594.1 1 2 J-6 8+15 15 1703.5 1590.7 1 2 J-7 8+20 15 1703.5 1588.7 2 7 J-8 8+25 15 1703.5 1585.7 1 2 J-9 8+30 15 1703.4 1592.2 2 43 J-10 8+35 15 1703.4 1572.7 1 13 J-11 8+40 15 1703.3 1576.3 1 4 J-11-A 8+40 16.5 1702.9 1570.7 1 41 J-12 8+45 15 1703.5 1569.7 2 9 J-13 8+50 15 1703.4 1568.7 2 91 J-14 8+55 15 1703.5 1565.7 2 21 J-15 8+60 15 1703.3 1564.7 2 30 J-16 8+65 15 1703.3 1562.3 2 131 J-17 8+70 15 --c --c 1 5 K-1 7+90 20 1701.2 1604.7 1 7 K-2 7+95 20 1701.1 1601.1 1 3 K-3 8+00 20 1701.1 1599.7 1 3 K-4 8+05 20 1701.1 1596.7 1 13 K-5 8+10 20 1701.2 1594.7 1 10 K-6 8+15 20 1701.3 1590.7 1 18 K-7 8+20 20 1700.8 1588.2 1 2 K-8 8+25 20 1700.7 1585.7 1 10 K-9 8+30 20 1700.4 1590.4 1 6 K-9-A 8+30 20 1699.9 1577.7 1 17 K-10 8+35 20 1700.9 1572.4 2 48 b Interflow between borings observed c Not Recorded

T/Hole Elevation

B/Hole Number of

Stages Number of Bags

Grout K-11 8+40 20 1700.7 1570.7 2 124 K-12 8+45 20 1700.5 1572.5 1 8 K-13 8+50 20 1700.6 1568.7 1 20 k-14 8+55 20 1701.0 1565.7 1 11 K-15 8+60 20 1700.7 1564.7 1 9 K-16 8+65 20 1700.7 1561.7 1 8 K-17 8+70 20 1700.4 1560.7 2 19 L-1 7+90 25 1698.8 1603.7 1 22 L-2 7+95 25 1698.8 1599.7 1 2 L-3 8+00 25 1698.8 1599.7 2 44 L-4 8+05 25 1698.7 1596.7 1 32 L-5 8+10 25 1698.6 1594.7 2 17 L-6 8+15 25 1698.3 1590.3 1 42 L-7 8+20 25 1698.3 1588.7 1 8 L-8 8+25 25 1689.6 1584.6 2 101 L-9 8+30 25 1698.6 1576.1 3 160 L-10 8+35 25 1698.6 1570.6 3 11 L-11 8+40 25 1698.0 1569.0 3 29 L-12 8+45 25 1698.2 1568.2 2 28 L-13 8+50 25 1698.4 1568.7 1 28 L-14 8+55 25 1698.4 1565.7 2 1343 L-15 8+60 25 1698.4 1562.4 2 18 L-16 8+65 25 1697.5 1574.4 2 251 L-16-A 8+65 25 1697.2 1562.2 1 4 L-17 8+70 25 1698.2 1560.7 1 6 L-18 8+56 26.5 1698.3 1558.7 1 7 M-6 8+15 -30 1696.1 1590.1 1 12 M-7 8+20 -30 1695.8 1588.7 2 16 M-8 8+25 -30 1695.8 1585.7 1 12 M-9 8+30 -30 1695.9 1577.7 1 15 M-10 8+35 -30 1695.9 1572.7 1 17 M-13 8+50 -30 1695.9 1579.9 1 10 M-14 8+55 -30 1698.0 1565.0 1 12 M-15 8+60 -30 1696.1 1564.7 1 13 b Interflow between borings observed c Not Recorded

Emergency Work, East Branch Dam, May 1957

Q-Pattern

H4ECDSRJ

Rectangle

X-Line

H1EDXGAH

Y-Line

H1EDXGAH

Z-Line

Polygon

As-Built Drawings 40 - Dam Masonry

2009 Geotechnical Exploration Grout Core Tests

Subsurface Exploration and 3D Model Development USACE Pittsburgh District East Branch Dam IDIQ A-E Contract for Geotechnical and Environmental Services Wilcox - Elk County, Pennsylvania Contract: W911WN-08-D-0001 (D’Appolonia), Task Order No. 0016

(feet) (feet) (psi)

08-EBD-E24 G.S. El. = 1707.03

GS-1 Grout Core 79.2 1627.83 3300.0

GS-2 Grout Core 80.1 1626.93 2380.0

GS-3 Grout Core 80.7 1626.33 4240.0

GS-4 Grout Core 83.0 1624.03 4310.0

08-EBD-E26 G.S. El. = 1706.96

GS-1 Grout Core 84.9 1622.13 6010.0

GS-2 Grout Core 86.0 1621.03 6290.0

GS-3 Grout Core 87.7 1619.33 3540.0

(2) Corrected unconfined compressive strength for L/D > 2.0

(1)Generalized correction factor of 24.5 is used to estimate UC strength from point load index results for Geotesting Express results

Table 9 - Summary of Compressive Strength Testing of Grout Core

SAMPLE

DESIGNATION

GENERALIZED

DESCRIPTION

DEPTH ELEVATION

UNCONFINED

COMPRESSIVE

STRENGTH, qu

(2)

2009 Geotechnical Exploration - Grout Core Tests