W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000.pdf

Solicitation For Rough River Dam Safety Modification Project Phase I - New Outlet Works and Cutoff Wall, Rough River Reservoir, Falls of Rough, KY

P2: 145870 Design-Bid-Build

Construction Materials and Foundation Completion Report - Karst Summaries Vol. 6 (18 of 20) Appendix E2 (2 of 4)

Certified Final

20 December 2024

W912QR25R0016

ARIMS: 1200

Disposition: Permanent

W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

ROUGH RIVER RIGHT BCLS

Grouting Summary Downstream Right Beech Creek

Grouting Summary Upstream Right Beech Creek

Downstream Drilling 2015 Profile

Downstream Grouting

Downstream Water Pressure Testing

Zone 5 Grout Take Data

DS Big Clifty SS P Avg = 119 gal S Avg = 100 gal T Avg = 9 gal

DS Beech Creek LS P Avg = 12 gal S Avg = 1397 gal T Avg = 159 gal

US Beech Creek LS P Avg = 105 gal S Avg = N/A T Avg = 42 gal

DS Elwren SH P Avg = 4 gal S Avg = 223 gal T Avg = 152 gal

US Elwren SH P Avg = 10 gal S Avg = 43 gal T Avg = 23 gal

DS Reelsville LS P Avg = 19 gal S Avg = 3 gal T Avg = 3 gal

US Reelsville LS P Avg = 2 gal S Avg = 2 gal T Avg = 3 gal

ZONE 5 Grouting Summary

142015 Profile

Revised Profile

2017 Profile

U

XP2242-2

U

XP2267-2

UPSTREAM

Key

Known Top of Rock

Encountered Clay Seams

Big Clifty Sandstone

Big Clifty Shale

Beech Creek LS Some Open Bedding Planes

Rotten Big Clifty Shale

Overburden

Valley Stress Fractures

Phase IB revealed that a dynamic, interconnected karst network exists in the dam foundation between

Stations 21+37 to 22+62, both U/S and D/S of the dam centerline, extending to the tailwater area along the left side foundation bedrock of the conduit

Old Profile

2017Profile

DXP2242-A

DOWNSTREAM

Key

Known Top of Rock

Encountered Clay Seams

DXP2267-A

Big Clifty Sandstone

Big Clifty Shale

Beech Creek LS Some Open Bedding Planes

Rotten Big Clifty Shale

Overburden

Valley Stress Fracturing

Old Profile

2017 Profile

Right BCLS Left of Conduit

UXP2142

UXP2142

UXT2147

UXT2147

DXS2152

DXS2152 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

Limestone to 151.2’

UXS2152

Sunday, 03/13/16:*

Soil Drilling:

The track rig set up on hole UXT2177 from 1100-1400 encountering the Beech Creek Limestone at a depth of

140.5 feet with the socket extending to a depth of 145. A soft clay seam approximately 8 inches thick separated the l imestone from the overlying weathered shale. The sleeveport pipe was inserted and the barrier bag was set grouted at 1445-1506 with a grout take of 5 gallons at 64psi. The 1st annular space was grouted from 1516-1539 taking 104 gallons at 38psi

Cubex: cleared blockage DXP2522 from 0730-900.

The L90 Core Drill set up on the following holes:

UXS1126 from 0730-0845 to a depth of 24.5-43 UXS1146 from 1030-1120 to a depth of 23.7-46.7 Uxp1876 from 1315-1415 to a depth of 135.3-154.7

Grouting:

UXP2076 had the stage 2 annulus grouted from 908-1001 taking 150 gallons of grout at 30 psi.

UXT2157 had the barrier bag was grouted from 730-752 with a grout take of 3 gallons at 35 psi. The 1st Stage annular space was grouted from 758-821 taking 73 gallons of grout at 62 psi.

Upper Interface:

UXP2076 from 1045-1110 taking 5 gallons at 62psi UXS2152 from 1141-1259 taking 74 gallons at 86psi

Full Depth Grouting:

DXP2302: 730-1045. The stage located at 137-152 took 31 gallons between 850-910 and the stage between 122- 137 took 35 gallons of grout from 922-951. All other takes were minimal.

DXP2482 from 1110-1450 with no significant grouting takes

Water Pressure Testing:

UXP1336 from 955-958 at a depth of 180-200 UXP1376 from 1138-1411 with the stage from 95-115 have a Lugeon Value of 0.82 and the stage from 80-95 having a lugeon value of 0.55. All overs were less than 0.5 Lugeons.

This week the following holes were televiewed: UXP1356, UXP1376, UXP1396, UXP1416, UXP1696, UXP1656, UXP1636, UXP1616, UXP1596

It is believed that this entry was mislabeled as UXS2152 and intended as DXS2152

Grouting

13-MAR (1141-1259)

PZ77A – 0.05’

PZ77B – 1’

PZ77C – 0.05’

Overburden Soils PZs Haney Lst PZs

Big CliftySandstone Beech Creek Lst PZs

Elwren Shale PZs Reelsville Lst PZs

PZ78B – 0.1’

PZ78C – 0.1’

PZ42 – 0.6’ PZ40 – 0.25’

PZ41 – 0.2’

PZ23 – 0.1’

PZ76B – 1.1’ PZ84B – 4’PZ74 – 1’

13-MAR (1141-1259)

13-MAR (1141-1259)

The reaction observed in PZ84 is considered unlikely related to grouting activities in DXS2152

UXT2157

UXT2157 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

DXP2162

1046 – Begin Grouting DXP2262 from 104-120’ 1116 – Begin Coring DXP2162 1125 – First Sample pulled on DXP2162 1127 – Pressure Spikes occur in DXP2262 1130 – Grouting and coring temporarily haulted 1302 – Coring completed/restart grouting 1402 – Grouting completed

- Approximately 361 gallons of grout

DXP2162 – DXP2262 Hole Communication

ALL HOLES BETWEEN THESE TWO BOREHOLES WERE NOT ADVANCED TO BC LIMESTONE YET

Big Clifty Sandstone and Shale Valley Stress Fracturing

Present both U/S and D/S of the Dam

DXP2162

141-143’

DXP2162 Beech Creek LS OTV and Core

Clay Seam 143.1-144.6’

Clay Seam 145.7-146.3’

Clay Seam 145.0-145.3’

DXP2262 from 104-120’ Big Clifty SS and Shale

DXP2262 from 138.5-148.5’ Beech Creek LS

UXP2162

Clay Seam 144.5-145’

UXP2162 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

DXT2167

DXT2167 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

BCLS encountered from 141-143.5’. 143.5-144.5’ stiff clay infill with weathered BCLS

0.9’ Loss Clay infill 145.3-146.2

0.3’ Loss

Grouting (1349 gal)

13-APR (1008-1627)

Overburden Soils PZs Haney Lst PZs

Big CliftySandstone Beech Creek Lst PZs

Elwren Shale PZs Reelsville Lst PZs

PZ40 – 4’

PZ41 – 3.5’

PZ57 – 0.8’

PZ58 – 27’

PZ37 – 0.25’ PZ42 – 20’

OW14A – 0.45’

13-APR (1008-1627)

13-APR (1008-1627)

UXT2167

Weathered shale and clay 135-140’

Beech Creek LS 140-142’

Stiff Clay infill with LS Frag. 142-144’’ Beech Creek LS 144-144.5’

Clay infill 144.5-145’’

Beech Creek LS 145-146’

Weathered Beech Creek Limestone and intermixed lenses of weathered shale, weathered limestone, and clay infill was encountered from 140-150 fbgs.

Limestone was encountered from 140-142 ft overlying gravelly clay from 142-144 ft. Limestone was then again encountered from 144-144.5 ft. Clayey gravel was encountered from 144.5-145 ft overlying limestone down to 146 ft.

Clay infill was present from 146-147.5 before competent limestone was encountered down to a depth of 150 fbgs.

Clay infill 146-147.5’’

Beech Creek LS 147.5-150’ (stretched 2:1)

UXT2167 Grout below fabric and clay in the Elwren Shale

Grout

GroutFabric

BCLS

DXS2172

1/28/16 from 65-67 in Lean/plastic Clay "Fractures parallel to core axis

DXS2172 Run below cracks W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

DXS2172 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

Elwren 0.1’ Clayey Seam at 163.2’

UXS2172

UXS2172 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

UXS2172 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

UXS2172 – Weathered Limestone

Weathered, clay staining

Soil Drilling and Casing Installation Field Notes: 03/15 - The track rig set up on UXS2172 from 0856-1230. The top of rock was called at 143.5’ and the bottom of the hole was 150’. The sleeveport pipe was inserted and the barrier bag was grouted from 1430-1455 with a grout take of 6 gallons at 14psi. The 1st annular space was grouted from 1502-1530 and took 107 gallons at 63psi

03/16 - UXS2172 :2nd annular space was grouted from 759-816 and took 67 gallons at 33psi

03/29 – Grouted the soil-rock interface of UXS2172 (S-R Int.) from 1019-1052 and took 2 gal. at 64 psi.

UXS2172 15-Mar Drilling

Top of hole

Top of

Rock

PZ72B- 2’

PZ72C- 18’

PZ72D- 20’

PZ42- 0.6’ PZ40- 0.9’

PZ58- 0.5’

PZ73A-0.6’

PZ36- 3.5’

Embankment Soil PZs Foundation Soil PZs Beech Creek Lst PZs

Reelsville Lst PZs of hole

Top of

Rock of hole

Top of of hole

Top of

DXT2177

Friday, 02/05/16:

The track rig started shift set up on DXT2177. Grout cart 1 set up next to the rig and began grouting the second stage of the annulus at 0737. After topping off, the stage took 110 gallons of grout. Cascade removed the casing and moved off the hole. The interface was grouted from 1346 to 1427, using 64 gallons. A piezometer was over the threshold limit defined by USACE, so grouting stopped. The interface was close to closing off before the threshold was reached.

• 2/4/16 from 67.5-68.5 at a depth of 492-491 in Lean/plastic Clay "Fractures parallel to core axis

Missing photos

DXT2177 – Overburden W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

147-150.5’

PZ24 – 0.8’

PZ36 – 1.5’

PZ40 – 1.9’

PZ41 – 2.8’

DXT2177

Interface grouting 64 gallons

Overburden Soils PZs Big Clifty Sst PZs

Beech Creek Lst PZs

PZ35 – 1’

PZ36 – 1.5’

PZ41 – 2.8

DXT2177

Interface grouting 64 gallons

Top of hole

Top of rock

Grouting started @ 1346, ended @1427

Grouting started @ 1346, ended @1427

PZ24 – 0.8’

of hole

Top of rock

DXT2177

Interface grouting 64 gallons

PZ35 – 1’

Grouting started @ 1346, ended @1427

Grouting started @ 1346, ended

Note: PZ-58 responded at this time as well, but looks to be in direct correlation to the stilling basin plot at this time and for the following week

PZ40 – 1.9’

Top of hole

Top of rock

DXT2177

Interface grouting 64 gallons

Grouting started @ 1346, ended

UXT2177

UXT2177 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

147.4’

147.4’

Clay and Grout 145.2-145.6’

Clay Infill 146.25’139-144.5 5.5’ of grout and clay Recovered from inside the PVC Casing Clay Infill 146.60-146.95

Clay and Grout 145.2-145.6’

150.5’

Not Clayey Shale

Field Notes: 03/13 - The track rig set up on hole UXT2177 from 1100-1400 encountering the Beech Creek Limestone at a depth of 140.5 feet with the socket extending to a depth of 145. A soft clay seam approximately 8 inches thick separated the limestone from the overlying weathered shale. The sleeveport pipe was inserted and the barrier bag was set grouted at 1445-1506 with a grout take of 5 gallons at 64psi. The 1st annular space was grouted from 1516-1539 taking 104 gallons at 38psi

03/14 - UXT2177 – Stage 2 Annulus was grouted from 848-908 and took 60 gallons at 20 psi.

UXT2177 13-Mar Drilling of hole

Top of

Rock

PZ44- 1’

PZ71B- 0.5’

PZ71C- 0.5’

PZ42- 0.6’

PZ73C- 1’

PZ73A- 0.5’

Embankment Soil PZs Elwren Shale Pzs

Beech Creek Lst PZs Reelsville Lst PZs of hole

Top of of hole

Top of

DXP2182

DXP2182 – Abandoned – No Clay

Weathered shale and clay material was encountered from 138-139 ft and Beech Creek Limestone was encountered below between 139-141 ft

Sandstone Boulder 134-135’

Clay and weathered Shale 138-139’’

Beech Creek LS 139-141’

Big Clifty Sandstone ’ Clay 136-138’ 135-136

At approximately 134-136 ft a boulder was identified with some sandstone transitioning back to tan clay from 136- 138’.

DXP2182 – Abandoned – No Clay

Gravity Zone Drilling damaged PVC conduit resulting in soil infill and erosion at the soil/bedrock interface, 1.6’ of loss in the LS.

138-141.5’

138-141.5’

Grout and Soil’ Limestone

See UXP2182 from 143-148’

22 Feb 2016 BCLS has 0.2’ of Loss To 145.16

11 May 2016 BCLS has 4 ft of Loss to 148’

DXP2182 –Abandoned NO CLAY

138.5-150.8 ft Some deviation of hole on this run. Core consists of split rock (limestone - reacts to HCl) and grout.

Also muddy return and gravel and clay in core.

Low losses in the BCLS

0.2’ of core loss in the Beech Creek LS

151’ Base of BCLS

151’ Base of BCLS2.5’ of Beech Creek LS 148.5-151’

151’

PZ24 – 5.6’

PZ36 – 10’

PZ40 – 2.8’

PZ41 – 4’

PZ58 – 2.8’

DXP2182

1st 15’ Gravity grouting 241 gallons

Horiz. Drain PZs Overburden Soils PZs

Big Clifty Sst PZs Beech Creek Lst PZs

Saturday 2/27/16:

DXP2182 from 1341-1612 taking 241 gallons at 80 psi. This hole caused a reaction in PZ-24 to approach 480

PZ51 – 0.3’

PZ36 – 10’

PZ41 – 4’

DXP2182

1st 15’ Gravity grouting 241 gallons

Top of hole

Top of rock

Grouting started @ 1341, ended @1612

Grouting started @ 1341, ended @1612

PZ40 – 2.8’

PZ58 – 2.8’ DXP2182

1st 15’ Gravity grouting 241 gallons

Top of hole

Top of rock

Grouting started @ 1341, ended @1612

Grouting started @ 1341, ended

PZ24 – 5.6’

PZ51 – 0.3’

DXP2182

1st 15’ Gravity grouting 241 gallons

Top of hole

Top of rock

Grouting started @ 1341, ended @1612

Grouting started @ 1341, ended

UXP2182

UXP2182 – 4’ clay infill zone sandstone boulders, cobbles, and gravels were Noted to occur between 130-135 feet.

UXP2182 4’ - clay infill zone

Grayish brown to brown silty clay with gravel derived from weathered limestone was noted to occur from 135-138 fbgs.

Limestone was encountered from 138-144.7 fbgs with thin clay seems noted at 143 fbgs (dust covered). Additional soft clay infill with trace weathered limestone cobbles and gravels was encountered from 144.7 to 147 fbgs.

Clay Seam 144.7’Clay Seam 143’

Beech Creek LS

Beech Creek LS 138’

UXP2182 - 4’ clay infill zone

Soft clay infill and weathered limestone with the consistency of gravelly clay was encountered from 145-149 fbgs underlain by 1 foot of limestone and another small clay seem to 150.5 fbgs where the Elwren Shale was encountered from 150.5

Soft Clay infill Clayey Gravel

Clay with LS Fragments

BC Limestone

BC Limestone Elwren Shale

BC Limestone Elwren Shale

Field Notes: 03/10 - The track rig set up on hole UXP2182 from 1202-1530 advancing to 135 feet before lightening ended the day at 1530.

03/11 - The track rig finished hole UXP2182 from 707-834. The hole hit apparent top of rock at 144.5 feet in the beech creek limestone. During cleanout of the hole clay filled void was encountered from 144.7 to 149 feet filled with saturated, fine, soft, clay soil and weathered limestone. The beech creek was then again encountered from 149-150 fbgs with an underlying clay seam. From 150-154 small limestone gravels and Elwren Shale were encountered at the bottom of the run. This feature is unlikely related to a boulder when DXP2182 is considered which hit 12 feet of limestone from 139-151 feet. The sleeveport pipe was inserted and the barrier bag was set at 149 fbgs and grouted from 858-922 with a grout take of 7 gallons at 42psi. The 1st annular space was grouted from 926-958 taking 135 gallons at 64psi. No grout was identified in the tailwater as expected and the hole refused taking approximately 50 more gallons of grout over the theoretical volume.

03/12 - UXP2182 had the stage 2 annulus grouted from 1005-1042 taking 100 gallons of grout at gravity pressure.

PZ42– 1.25’

PZ40– 0.75’

UXP2182 11-Mar 926-958 135

PZ24– 2’

PZ36– 1.5’

PZ41– 0.6’

Overburden Soil PZs Beech Creek Lst PZs

Elwren Shale Reelsville Limestone

Begin Grouting 135 gallons

Begin Grouting 135 gallons

Begin Grouting 135 gallons

Grouting terminated

Grouting terminated

Grouting terminated

Begin Grouting 135 gallons

Begin Grouting 135 gallons

Grouting terminated

Grouting terminated

DXT2187

DXT2187 – Clay Infill

140: Driller thought TOR terminated 7” casing.

140-146: Saturated fat clay with some highly weathered shale and LS fragments NOTE: An Additional 18 feet of wet, very soft clay infill was removed from the hole during clean-out.

Interface took 200 gallons of grout/Gravity Zone 61 gallons

BCLS

141’

Soft fat clay

Soft Clay Infill 141-146’

BC LS Ledge 140-141’

Clay infill/weathered shale infill (5’)

Beech Creek LS 146’

DXT2187 Dramatization (Haney Limestone in Spillway Shown)

DXT2187 –Beech Creek LS Rock Core grout

Limestone 146-152.5’

Limestone 146-152.5’

Clay Staining

Clay Seams

Fracture zone

Fracture zone

Tuesday, 01/26/16:

The track mounted sonic rig set up on DXT2187. Began drilling at 1010. The top of rock was at 140 feet and the bottom of the hole is at 144 feet (complete at 1445). The sleeveport pipe was inserted and cart 1 set up next to the rig. The bag was grouted starting at 1544. The bag took 6.2 gallons. The first stage of the annulus was completed at 1654 at 152 gallons. Cascade removed 80 feet of casing.

Overburden Soil PZs Beech Creek Lst PZs

Elwren Shale Reelsville Limestone

PZ41

PZ40

PZ72D

PZ36PZ24

PZ35

Top of rock

Top of hole

DXT2187 Barrier Bag, 1st

Annulus Grout, 158 gal

PZ41

PZ40

PZ72D

Top of rock

Top of hole

DXT2187 Barrier Bag, 1st

Annulus Grout, 158 gal

DXT2187 Barrier Bag, 1st Annulus Grout, 158 gal

DXT2187 Barrier Bag, 1st Annulus Grout, 158 gal

PZ36

PZ24

Top of rock

Top of hole

DXT2187 Barrier Bag, 1st Annulus Grout, 158 gal

DXT2187 Barrier Bag, 1st Annulus Grout, 158 gal

DXT2187 Barrier Bag, 1st Annulus

PZ36

PZ35

Top of rock

Top of holeDXT2187 Barrier Bag, 1st Annulus Grout, 158 gal

DXT2187 Barrier Bag, 1st Annulus

DXT2187 PZ Reactions

Target Pressure at 3.2 gpm 01/27/16:

PZ36 – 7.5’

PZ41 – 6’

DXT2187

Interface grouting 185 gallons

Top of hole

Top of rock

Grouting started @ 852, ended @954

Grouting started @ 852, ended @954

PZ40 – 6’

PZ58 – 2.8’

Top of hole

Top of rock

DXT2187

Interface grouting 185 gallons

Grouting started @ 852, ended @954

Grouting started @ 852, ended @954

PZ24 – 3.2’

of hole

Top of rock

DXT2187

Interface grouting 185 gallons

PZ35 – 3.2’

Grouting started @ 852, ended @954

Grouting started @ 852, ended @954

UXT2187

UXT2187 –Overburden/Beech Creek LS Contact

135-138 : Clayey gravel with weathered sandstone and shale 139-140.5 : Beech Creek Limestone 140.5-143 : Clay infill with weathered limestone fragments 143-145 : limestone with clay seams.

145-150 : soft clay, creamy infill with limestone clasts.

Interface Grouting – 3 gallons/Gravity zone 45 gallons

Clayey Gravel with SS and Shale 135-138’

Clay 138-139’

BCLS 139-140.5’

BCLS with clay seams 143-145’

Clay Infill 145-148’

148-150 : Soft clay infill with weathered limestone fragments at the base of the Beech Creek Unit.

150-155 : Elwren Shale

Clay Infill 148-150’

UX

T2

Overburden Soils PZs Haney Lst PZs

Big CliftySandstone Beech Creek Lst PZs

Elwren Shale PZs Reelsville Lst PZs

UXT2187

DRILLING / GROUTING

21-MAR (0800-1541)

PZ24 – (-1.5’)

PZ36 – (-1.0’)

PZ79C – 0.1’

PZ40 – 0.4’

PZ41 – (+/- 0.15’)

PZ42 – (+/- 1.0’)

PZ78B – (+ 0.3’ / - 0.1’)

PZ78C – (+ 0.25’ / -0.15’)

PZ58 – (+0.15’/- 0.1’)

PZ83B – 2.5’

PZ82B – 4’

DRILLING / GROUTING

21-MAR (0800-1541)

21-MAR (0800-1541)

21-MAR (0800-1541)

*Reactions noted in these piezometers are considered unlikely attributable to activities conducted at UXT 2187

21-MAR (0800-1541)

*Reactions noted in these piezometers are considered unlikely attributable to activities conducted at UXT 2187

DXS2192

DXS2192 –Overburden/Beech Creek Contact

Clay 133-135) Shale 135-138’ (stretched)

BCLS 138-141’

DXS2192 – Sonic Socket and Rock Core

12/18 the core drill advanced from 141 to 156 ft. Fluid was lost almost immediately and a 1.5 foot rod drop occurred from 141.9-143.4. A large open bedding plan is apparent at about 0.6’ of the recovered 0.9’ run (1.5’ loss-likely void or clay infill).

Drill water did not return until the drill advanced into the lower portion of the beech creek LS.

141-143.4’ 141-143.4’

Clay was encountered from 133-135 with brown and gray weathered shale extending from 135- 138 feet. The Beech Creek LS was encountered from 138-141 ft.

Clay 133-135’’(stretched) Shale 135-138’ (stretched)

BCLS 138-141’

DXS2192 Interface Grouting 16 December 2016

- Grouting the rock socket 138-141’ at gravity pressure.

- Measured by an instrumented packer to determine effective pressure at the point of injection

- Refusal criteria is <1 gpm for 10 minutes at target pressure

- Total of 591 gallons of A-mix and B-mix (Wednesday afternoon)

- Flow was 7.5 gpm at 52 psi with a target pressure of 65 psi.

- Was the first grout hole to confirm a karst network on the project.

Grout Mixes

- Grout Mixes

- All are balanced, stabilized grouts, <1% bleed

- E mix is a sanded mix

- W/C content varies from 0.9 – 1.5

- Marsh Funnel Times

- A mix – 35-40

- B mix – 40-55

- C mix – 55-70

- D mix >70

- Flow cone for E mix >12

- Use a neat A mix for barrier bag inflation

Field Notes: 12/16 - The track mounted sonic rig moved to DXS2192. Began drilling at 1042. Drilled through the embankment without issues.

The driller thought he had encountered rock at 133 feet, so he ended his run from 125 feet at 133 feet. The run from 133 to 141 feet was drilled from 1343 to 1352. The sample had clay at the top of the run down to the top of rock. The top of rock was at 138 feet, and the bottom of the hole was at 141 feet. Cascade inserted the sleeveport PVC. ACT then moved grout cart 19-10-07 (operational again) over to the hole. The “bag-mix” was batched in the portable mixer near the hole, and grouting the bag began at 1500, using 3 gallons. The first stage of the annular space was grouted from 1542 to 1609, taking 96 gallons – Cascade removed 60 feet of casing. Cascade stayed on the hole so they can grout the second stage in the morning. ACT set up the grout cart to grout the interface. Began grouting at 1640. The intellisystem operator kept thinking there must be grout coming up in the casing because the pressure was not building. The operator had the laborers on the platform continue checking the casing for grout. After several batches of A-mix, we switched to B-mix. After two medium sized batches of B-mix, ACT let the hole rest for night before continuing to grout in the morning. Grouting completed at 1855 with 591 gallons of A-mix and B-mix. We were flowing at 7.5 gpm and had reached ~52psi pressure when the last batch of B-mix ran out at the end of shift.

**Note: ACT requested to switch to B-mix, and I agreed with the request. Also note, ACT recommended we stop grouting after the second batch of B-mix, and I agreed. Both requests can be seen as direction from the Corps due to the Specification requiring government direction for both changing a mix and to stop grouting without closure.

Overburden Soil PZs Beech Creek LS PZs

Reelsville LS PZs Big Clifty Sandstone PZs

PZ24–0.6’

PZ36– 3.5’

PZ35– 6’

PZ77B– 2’

PZ40– 5’

PZ41– 3’

PZ42– 25’

PZ58– 13’

PZ76B– 5.5’PZ74B– 1’

DXS2192

Soil-Rock Interface 591 gallons

PZ’s 74B, 76B and 77B reactions may be due to drilling in DXP2062 from 1402-1720

Interface grout 591 gallons

Top of rock

Top of hole

Interface Grout 591 gallons

Interface Grout 591 gallons

Interface Grout 591 gallons

PZ Reactions 1-2.5’

591 gallons

Top of rock

Top of hole

Interface Grout 591 gallons

Interface Grout 591 gallons

3’ Rise

4.5’ Rise of rock

Top of hole

Interface Grout 591 gallons

Interface Grout 591 gallons

DXS2192

Interface grout 591 gallons

26’ Rise

7’ Rise

591 gallons

Top of rock

Top of hole

Interface Grout 591 gallons

Interface Grout 591 gallons

Interface Grout 591 gallons

13’ Rise

4.2’ Rise

1’ Rise

On December 16 we grouted up PZ-42

On December 18 we attempted to bail and wash The hole but eventually converted the well to VW-42

DXS2192

PZ-42

PZ-41

141.9-143.4’ - 1.5 foot rod drop and fluid loss occurred at about 0.6’ of the recovered 0.9’ run (1.5’ loss-likely void or clay infill).

144.3’ apparent clay seam that has washed out causing the circulation loss. PZ-42 reacted instantaneously and was manually read real time during rock coring.

146.7-146.9’ Weathering and clay staining was noted on the fracture faces at a depth of 146.7 to 146.9 ft.

Partial Circulation return below this depth.

148.5-149.5’

143.4-148.5’

146.7-146.9’

DXS2192 –Rock Core 18 Dec 0745-0950

143.5-144.3’ 0.4’ loss @143.5’

141-143.4’

12/18 - The Core rig set up on DXS2192 and drilled from 141 to 156 feet this morning. Drilled from 0748 to 0948. The core rig flushed the hole. The Televiewer survey was run on DXS2192. Grouting of first 15 feet of rock for DXS2192: Grouting began at 1229. After running A-mix grout for a while, the pressure was not building fast and was not approaching the target of 90 psi. At 1245, I directed ACT to batch 3 A-mixes, 2 B-mixes, 2 C-mixes and so on. I was notified grout was seen in the river at 1300. At 1400, the flow was at 7.5 gpm and the pressure was at 52 psi. ACT began the first batch of B-mix. After meeting with other Corps employees it was decided to increase the mix changes to one batch each. When I got back into the grout cart, the second B-mix was just being made. Then ACT batched one C-mix followed by one D-mix. At 1600 the pressure was approximately 70 psi and the flow was at 5.5 gpm (ACT had just run down the batch of D-mix) and they stopped grouting to get the sanded mix batched.

They had to set up the sand mix portable grout mixer, get it to run, and mix up the first batch of E-mix (the sanded mix, which is D-mix plus sand). The grout cart operator had been told to remove the packer from the hole just in case the grout set up. When the crew was ready, the packer was lowered back in the hole. The packer had been set at 141 feet earlier in the day, but the packer could only be lowered to 139 feet this time. Grouting resumed at 1725. The pressure was increasing much faster than it had earlier in the day, but the flow had to be significantly decreased or completely stopped several times to make new batches of E-mix. At 1859 target pressure (90 psi) was reached, and the flow was at 7.5 gpm. At approximately 1930, a QC told me we had pumped just over 400 gallons of the sanded mix into the hole (according to Spec, ACT is required to inform the Corps when the sanded mix is at approximately 500 gallons – so the Corps can decide if they want to continue grouting or to let the hole set to resume grouting at a later date). We agreed it was best to stop, and we decided to use the rest of the grout in the mixer. At 2001, we were out of grout – the flow was at 6.2 gpm at target pressure. The total grout amount pumped today was 1913.9 gallons (A-mix through E-mix combined).

DXS2192 Grouting Summary of 15 foot gravity zone

Grouting began at 1229 and pressure did not build 1300 Grout was detected in the tailwater 1400: Switch to B-Mix (7.5 gpm @ 52 psi) 1600: Grouting Terminated: 5.5 gpm @ 70 psi 1725: resumed grouting with E mix 1900: Flow @7.5 gpm at target pressure (90 psi) 2000: flow@ 6.2 gpm at target pressure.

1913.9 gal. (A-E mixes including 500 gal. E-mix Lugeon Value = 50.

Drill rig set up on DXS2192 early morning

PZ-58

PZ 42

PZ-40 PZ-41

DXS2192 –Stilling Basin Before Grouting

MURKY WATER!!!

Weep Holes

Stilling Basin Weir

Stilling Basin

Grout Exiting Weep Hole

FLOW

Grout

Construction Joint

PZ24–7.5’

PZ36– 25’ PZ35– 25’

PZ41– 53’

PZ40– 14’

Overburden Soil PZs Beech Creek LS PZs

Big Clifty Sandstone PZs

DXS2192

15’ Gravity grout

1913.9 gallons

15’ Gravity grout

1913.9 gallons

Top of rock

Top of hole

Begin Grouting 1914 gallons

Switch to E-mix

Switch to E-mix

Begin Grouting 1914 gallons

20’ Rise

7’ Rise

1913.9 gallons

Top of rock

Top of hole

Begin Grouting 1914 gallons

Begin Grouting 1914 gallons

Switch to E-mix

Switch to E-mix

15’ Rise

55’ Rise

1913.9 gallons

Top of rock

Top of hole

Begin Grouting 1914 gallons

Switch to E-mix

23’ Rise

25’ Rise

PZ-36

Sta 22+30, 33’ US, Elev 435

PZ-24

Sta 22+00, 20’ US, Elev 431

PZ-42

Sta 22+30, 70’ DS, Elev 413

PZ-58

Sta 22+45, 240’ DS, Elev 405

PZ-50

Sta 22+23, 70’ US, Elev 440 (US Blanket)

PZ-41

Sta 22+30, 47’ DS, Elev 435

Drilling and Interface grouting of DXS2192

PZ-42

PZ-58

Grouted up on the 17th

PZ-41

2015Profile

PZ-36

Sta 22+30, 33’ US, Elev 435

PZ-24

Sta 22+00, 20’ US, Elev 431

PZ-42

Sta 22+30, 70’ DS, Elev 413

PZ-58

Sta 22+45, 240’ DS, Elev 405

PZ-50/51

Sta 22+23, 70’ US, Elev 440 (US Blanket)

PZ-41

Sta 22+30, 47’ DS, Elev 435

Drilling and Interface grouting of DXS2192

PZ-24

PZ-36

PZ-51

PZ-50

DXS2192

DXS2192 – OTV Obtained After Full Depth Drilling Was Complete

Beech Creek LS

Beech Creek LS

Elwren Shale

Clay

Clay

Grout

Beech Creek LS

Beech Creek LS

Beech Creek LS

The Televiewer revealed an additional 1.5’ of loss in the Beech Creek not shown with the original rock core

Grout

Grout

Grout

Clay Seam Grout

Grout

Known Loss

146’ partial fluid return

Undocumented Loss

Undocumented Loss

141.9’ Fluid Loss

Beech Creek LS

Grout Seams 12/16 - The top of rock was at 138 feet, and the bottom of the hole was at 141 feet. While grouting the interface pressure did not build. 591 gallons of A-mix and B-mix were pumped at a flow of 7.5 gpm at ~52psi.

12/18 – The gravity zone was grouted from a depth of 141-156 feet. The target pressure was 90 psi. While grouting A-E mix was used with a combined grout take of 1913 gallons. Upon termination the hole had taken ~500 gallons of E mix with a flow rate of 6.2 gpm at 90 psi.

During this grouting operation grout was identified in the tailwater area.

DXS2192 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

UXS2192

UXS2192 – Sonic Drilling colluvial weathered shale /silty clay with sandstone and shale gravel from 135-141 fbgs. At a depth of 141 to 144 the clay was very soft with a large limestone boulder covered in clay near 144 ft. Other small fragments of weathered limestone were noted in this zone. (Potential infill zone)

BC LS Boulder at 144’

UXS2192 – Beech Creek LS with Clay Seams and soft clay infill

145-148 : Beech Creek LS had several soft clay seams with some limestone clasts.

146.3-146.5, 147.5-148 : Soft Clay Seams

Soft Clay Infill 147.5-148’

Weathered BCLS

Stiff Clay 146.3-146.5

BCLSBCLS

BCLS

Soft Clay Infill 145-145.5

UXS2192 – Beech Creek/Shale Contact

148-149.5 : Beech creek limestone 149.5-151 : Elwren Shale Interface Grouting refused at 615 gallons of grout 156

PZ-24 (began 10-ft drop ~1700)

PZ-51 (began slight drop ~0500)

Pool (began slight drop ~0600)

Last gate change ~0900

[T ai lw at er

PZ-42 (began slight increase ~0500)

PZ-40 (began slight drop ~0500)

PZ-58 (began slight drop ~0600)

PZ-58 (slight uptick when gates are closed ~0930)

Pool

Tailwater

PZ-51 (U/S Blanket)

PZ-50 (U/S Blanket)

PZ-36 (U/S interface)

PZ-24 (U/S interface)

PZ-51 (U/S Blanket)

PZ-40 (D/S Beech Creek – abut side of conduit)

PZ-42 (D/S Beech Creek – valley side of conduit… grouted up and reset…prior to, was a higher version of PZ-58)

PZ-40 (D/S Beech Creek – abut side of conduit)

Stil l ing Basin

PZ-58

PZ-24 (U/S interface) W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

Tailwater

Stil l ing Basin

PZ-58

PZ-42 (D/S Beech Creek – valley side of conduit… grouted up and reset…prior to, was a higher version of PZ-58)

Field Notes Monday, 03/14/16:*

The track rig set up on hole UXS2192 from 923-1310. There was an intermixing of soft clay infill with stiff clay above the top of rock. The largest area of clay infilling was approximately 2 feet thick and occurred above the beech creek limestone between 143 and 145 fbgs. The material had 0 shear strength and had a consistency of pudding to creamy peanut butter. Below this infill was weathered limestone overlying some slightly more competent limestone. Two 8 inch thick clay seams occurred just below the top of the beech creek near 146 and again at 147.5. The clay seams were very soft and plastic and also had 0 shear strength. Some of the beech creek limestone showed some solutioning and there appeared to be some vertical joints in the clay seams. From 148- 151 the drill encountered 1 additional foot of beech creek limestone and 2 feet of the Elwren Shale. The top of rock was called at 145 and the bottom of hole was 151. The sleeveport pipe was inserted and the barrier bag was grouted from 1443-1515 with a grout take of 8 gallons at 36psi. The 1st annular space was grouted from 1522-1540 and took 100 gallons at 64psi

L90 Core Drill:

DXP2542 from 1330-1610 to a depth of 15.6-37

UXS2192 Drilling 923-1310

Pool:

Hole

Top of Rock

Overburden Soils PZs Reelsville PZs

Beech PZs

PZ42- .3’

PZ24-1.5’

UXS2192 Drilling 923-1310

Hole

Top of Rock

PZ42- .3’

PZ24-1.5’

Drill UXS2192 923-1310

Drill UXS2192 923-1310

Core 15’

DXP2542

1344-1613

Core 15’

DXP2542

1344-1613

UXS2192 Drilling 923-1310

Field Notes:

3/16 - UXS2192 from 908-1429 and took 615 gallons of grout (463A/55B/96C at 62 psi. Two Dam safety inspections conducted.

PZ-58 exceeded the alarm due to high releases. PZ-24 was inspected at 1444. The manual water level reading was 46.7 feet. The bottom was sounded to a depth of 129.8 feet at the bottom. The instrument was re-installed at 1455. There was no sign of grout.

PZ-36 had a strong reaction to drilling as expected considering the reaction exhibited during drilling.

UXS2192 908-230 615 gallonsPZ51- 0.7’

PZ36- 27.5’

PZ41- 3.25’

PZ40- 8’

PZ58- 5.5’

PZ42- 14’

PZ38- 0.75’

Overburden Soil PZs Beech Creek Lst PZs

Horiz. Drain PZs Reelsville Lst PZs

PZ24- 5’

PZ50- 0.52’PZ79B - 0.2’

PZ79C – 0.4’

PZ78B – (-0.35/+0.15’)

PZ78C – 0.4’

UXS2192 615 gallons

Grouting 615 gallons

Grouting 615 gallons

Grouting 615 gallons gallons

Grouting 615 gallons

Grouting 615 gallons

Grouting 615 gallons

Grouting 615

UXS2192 908-230 615 gallons gallons

Grouting 615

UXS2192 908-230 615 gallons gallons

Grouting 615

PZ

-2

3/14 Soil Dril led from 0923-1310 Lower annulus grouted, 1522-1540PZ

-3

USX2192 – 10 ft. u/s PZ-24 – 20 ft. u/s PZ-36 – 33 ft. u/s

Dr ill in g

An nu lu s G ro ut

In te rf ac e G ro ut in g

Dr ill in g

An nu lu s G ro ut

In te rf ac e G ro ut in g

PZ-36/L - Spiked 27 feet PZ-40- Spiked 10 feet PZ41-Spiked 3 feet PZ58- Spiked 5 feet Temperature drops: PZ-36 and PZ-41

PZ-36 dropped after the sonic rig penetrated into the Beech Creek LS. The PZ rebounded during annulus grouting

UXS2192 – PZ ReactionsW912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

Holes – 10 ft. u/s PZ-24 – 20 ft. u/s PZ-36 – 33 ft. u/s

Dr ill in g U

XS

PZ

-2

4 PZ

-3

Dr ill in g U

XS

Dr ill in g U

XT

Dr ill in g U

XT

Dr ill in g U

XT

Dr ill in g U

XT

Dr ill in gU

XS

Hole BOH Date Time Drilled Time Grouted

UXS2192 151 3/14/2016 0923-1310 1522-1540

UXT2187 154 3/21/2016 0800-1400 1515-1541

UXT2177 145 3/13/2016 1100-1400 1516-1539

UXS2172 150 3/15/2016 0856-1230 1502-1530

UXT2167 150 3/22/2016 914-1319 1539-1559

Upstream Reactions to Soil DrillingW912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

Vertical Holes

DXP2242-A

DXP2242-A - 126.5-136.5 weathered rock/rock

Gray grout and clay was encountered overlaying a thin limestone cap. Limestone was noted from 131-133 fbgs. A tool drop was noted from 133 to 136 in the clay infill. It is assumed that very little of this material was recovered as part of that run and the infill was recovered as part of the next run with very soft, wet, clay infill present from 133-139 fbgs. The clay infill had a creamy texture ranging from pudding to peanut butter. Bag samples were taken at 131-133, 136.5-137.5, 137.5-139. 1 feet. Competent limestone was encountered below the void from 139 of 141 fbgs.

Purple is a positive reaction with Phenolphthalein indicating the presence of grout

’ Grout

Grout

3’ Tool Drop from 133-136.5

GroutSoft Clay

DXP2242-A - 136.5-141’ – Clay infill and rock (high recovery – 3’ from last run shown

BCLS and grout ribbons in the clay infill

139’-141’ BC LS

133.5-136.5 ‘ Noted as Tool Drop previously retrieved as part of this run

DXP2242-A - Rock below (100% recovery)

Gravity Zone from 139-148’

Televiewer – full depth hole

Base of the Beech Creek

UXP2242-1

UXP2242-1 – 126-136 overlying clay

UXP2242-1 – 136-140 – Interface, rock, clay seam

Clay seam at 139’

Vertical fracture 138’

Clay and Weathered limestone

From 133 to 137 fbgs the weathered shale was more gravelly. The Beech Creek Limestone was encountered from 137-140 fbgs.

Vertical fractures with clay staining were noted at 138 fbgs in the recovered limestone. A 0.5 foot clay seam was noted at 139ft.

UXP2242-1 Underlying rock 137-147’

0.5’ of BCLS Remains below

UXP2242-2

UXP2242-2 from 116.5-133’ – Typical Overburden Soils

UXP2242-2 - 116.5-126.5

UXP2242-2 - 126.5-132.8’

Big Clifty Shale w/ grout 125-126.5’

Wood

Sandstone

Clay

UXP2242-2 - 126.5-132.8 clay/weathered shale/rock

From 126.5- to 132.83 fbgs the soil was a gravelly clay was

UXP2242-2 - 132.8-138’ – LS/Clay Infill Top of Limestone 132.8-134’

Clay Seam

Clay infill with limestone fragments and boulders 134’-136’

UXP2242-2 - Interface Log and Underlying Rock

1.5’ Intensely Fractured with poor recovery 4.8’ loss

Poor Recovery In Shale

Core Drilled from 137.5’ to 139.5’ with 0.3’ of recovery. 1.7’ of loss for the run

137.5’

DXP2267-A

DXP2267-A - 86-96/ and 106-114’

Weathered SS/Shale/Clay/Grout

DXP2267-A Grout - 112-122’

Weathered SS/Shale/Clay/Grout

DXP2267-A Grout - 122-127’ and underlying rock core 128-138.5’

128.5-131.1’ has 1.5’ loss-possible clay Blue gray weathered shale was encountered 122-127.5’.

DXP2267-A - Rock Core/OTV 128-142’ 128.5-131.1’ has 2’ foot core loss (washed shale beds)

131.1-135’

Grout

Washed Shale Bed

Washed Shale Bed

Washed Shale Bed

Washed Shale Bed

BC LS

BC LS

BC LS

Clay Seam and Vertical Fracture 139-142’

UXP2267-1

UXP2267-1 - Fill/Bedrock Contact 106.5-122’

Weathered SS/Shale/Clay/Grout 114-116’

Weathered SS/Shale/Clay/Grout – 116-122’ with excess cave in material shown

Orange brown, medium stiff plastic clay was encountered from 106-114.5 fbgs.

A very soft zone was noted at a depth of 116 fbgs where the tools advanced with minimal down pressure

Grout with clay, shale, and gravels was encountered from 114.5-122 fbgs. The hole caved and was cleaned out twice from 116- 122’. The mixture contained some sandstone cobbles and boulders.

UXP2267-1 - Fill/Bedrock Contact 122-132 and rock core 132’-141.25’

The big clifty shale was encountered from 122-129. The beech creek LS was encountered at 129-132 fbgs. Clay staining and a clay seam was present from 130-130.5.

The core shown below had a 2.6 foot loss in upper stained portion of Beech Creek LS (9.9’ drilled, 6.3 ‘ recovered). Possible washed clay zone

BCLS

BCLS

Clay Seam 130- 130.5’

Soft weathered Big Clifty Shale 122-129’

2.6’ loss 132’-141.25’

BCLS 129-132’

UXP2267-2 and UXP2267-1 Beech Creek Comparison

UXP2267-1 BCLS 132-141’ UXP2267-2 BCLS 128-138’

Clay Seam

Clay Seam

Core Loss

Shale Seam

Shale

Vertical fracture

Core Loss

Shale Seam

Shale Seam

UXP2267-2

UXP2267-2 - Fill/Bedrock Contact 106.5-114’ Weathered shale and sandstone were encountered at a depth of 109.5-112’

Sandstone was encountered from 112 to 113’

UXP2267-2 - Fill/Bedrock Contact 114-121.5’

Weathered Shale – Clay 116.5’

Weathered Shale – Clay 120-121.5

A highly weathered mix of shale and sandstone gravels intermixed with clays were encountered extending from 114- 121.5 ft.

UXP2267-2 – “Rotten” Weathered Shale 114-121.5’

Weathered Shale – Clay 116.5’

Weathered Shale – Clay 120-121.5

A highly weathered mix of shale and sandstone gravels with clay was encountered extending from 114- 121.5 ft.

UXP2267-2 - Fill/Bedrock Contact 121.5-128’

Grayish brown to gray shale was encountered from 121.5-128.0 fbgs. The shale in the lower portion of the run had rock like properties and was considered competent rock.

UXP2267-1 and UXP2267-2 Beech Creek Contact

Soft weathered Big Clifty Shale with grout, clay, and gravel 122-129’

BCLS 129-132’

UXP2267-2 121.5-128’ – The interface was drilled and grouted before UXP2267-1

UXP2267-1 122-129’ – Saturation likely caused by coring and grouting of UXP2267-2

2022015 Profile

UXP2267-2 Underlying rock 128-138’ (100% Recovery)

UXP2267-2 and UXP2267-1 Beech Creek Comparison

UXP2267-1 BCLS 132-141’ UXP2267-2 BCLS 128-138’

Clay Seam

Clay Seam

Core Loss

Shale Seam

Shale

Vertical fracture

Core Loss

Shale Seam

Shale Seam

Right BCLS Conduit Right

DXT2227

DXT2227 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

DXS2232

DXS2232 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

DXS2232 High Grout Take in Big Clifty Shale - Water Loss between 133-135’

• 2/20 - Downstage grouting Injected 409 gallons of A-mix, 139 gallons of B-Mix, and 297 gallons of D-mix

• Terminated grouting when PZ-35 reached a level of 554 at 845 gallons 14 psi shy of the target pressure.

• Grouted up PZ-35 tipped in the Beech Creek LS to a depth of 104 ft. Upon inspection fluorescein dye

• 2/22 An additional 742 gallons of grout was injected to reach closure

• 6/6 Grouted from 136-151’ taking 865 gallons of grout causing a 40’ jump in PZ- 40 tipped in the Beech Creek, taking 158 gallons the following day to reach closure

• No identifiable defects in the Beech Creek LS

Water loss between 133-135’

Grout Take 136-151’

Field Notes: 02/20 - ACT began downstage grouting on hole DXS2232 in the zone where they had water loss on Friday. They began injecting A mix at 0730 and almost immediately saw a reaction in PZ35. They injected 3 medium batches of A-mix (409 gallons, 0730-0844) followed by 1 medium B-Mix (139 gallons, 0844-0906). Pressure was slowly building in the grout hole and the pressure in PZ35 continued to rise. The GOV directed ACT to switch to D-mix to try to seal the hole while continuing to monitor the pressure in PZ-35. Grouting was stopped at 0945 when PZ reached a level of approximately 554 after injecting approximately 297 gallons of D-Mix. The pressure in PZ-35 began to drop almost immediately upon stopping the grouting operation. The total grout injected was approximately 845 gallons. The maximum pressure that was achieved was 52.6 psi and the target pressure was 65.2 psi. ACT will re-setup on the hole Monday to try to close the hole.

02/22 - Grouted hole DXS2232 again for downstage grouting. Packer was set at a depth of 115' and target pressure was 69 psi.

Grouting started at 1202-1325 with A-Mix Grout pumping approximately 371 gallons into the hole. The injection pressure was at 69 psi so B-Mix grout started at 1325 and took 249 gallons of grout. At 1527, C-Mix was started to close up the hole. 122 gallons CF of C-Mix grout was pumped into hole to reach refusal. The total grout injected today was 742 gallons. The total gallons to reach closure was 1586 gallons.

06/06 - DXS2232 0915-1138, Stg. 3 from 136-151’ took 865 gal. total (557 gal. of A-mix and 308 gal. of B-mix) the hole did not refuse and was flowing 7 g/m at 79 psi. when operations ceased due a 40’ jump in PZ40

06/07 – Grouted DXS2232 0752-0948; Stg. 2 from 136-151’ took 158 gal. at 81 psi

PZ-35

Dye in PZ-40 was placed on 20 May 2010.

Overburden Soils PZs Beech Creek LS PZs Elwren Shale PZs Reelsville Lst PZs

Top of rock

Top of

Hole

DXS2232

Drilling water loss and grouting, 845 gallons

PZ24 – 0.3’, 0.7’

PZ35 – 88’, 92’PZ36 – 0.7’, 2.5’

PZ40 – 15’, 17’

PZ41 – 0.3’, 0.8’

PZ58 – .5’, .5’

PZ39 – 0.4’, 0.6’

PZ78A – 8’, ?’

PZ78B – 7’, ?’

PZ78C – .25’, ?’

PZ79A – ?’, .3’

PZ78C – .2’, .5’

Drilling water loss and grouting, 845 gallons

PZ24 – 0.3’, 0.7’

PZ35 – 88’, 92’

Water Loss

Grouting

Water Loss

Grouting loss and grouting, 845 gallons

PZ36 – 0.7’, 2.5’

PZ41 – 0.3’, 0.8’

loss and grouting, 845 gallons

PZ40 – 15’, 17’ PZ39 – 0.4’, 0.6’

loss and grouting, 845 gallons

PZ50 – .1’, ..4’PZ51 – 2’, .6’

02/19 - LF90 Core drill was set up on hole DXS2232 from 0825-1035. From 97' to 120' grout was encountered in the hole. While drilling at the bottom of the Big Clifty formation at a depth of 135' water loss occurred. Drilling was stopped immediately and this area will be grouted tomorrow.

05/31 – Cored DXS2232 1602-1612/118.9-129.2’

06/01 – Cored DXS22320802-1214/129.2-179.2’

Hole Grouting

Field Notes: 02/20 - ACT began downstage grouting on hole DXS2232 in the zone where they had water loss on Friday. They began injecting A mix at 0730 and almost immediately saw a reaction in PZ35. They injected 3 medium batches of A-mix (409 gallons, 0730-0844) followed by 1 medium B-Mix (139 gallons, 0844-0906). Pressure was slowly building in the grout hole and the pressure in PZ35 continued to rise. The GOV directed ACT to switch to D-mix to try to seal the hole while continuing to monitor the pressure in PZ-35. Grouting was stopped at 0945 when PZ reached a level of approximately 554 after injecting approximately 297 gallons of D-Mix. The pressure in PZ-35 began to drop almost immediately upon stopping the grouting operation. The total grout injected was approximately 845 gallons. The maximum pressure that was achieved was 52.6 psi and the target pressure was 65.2 psi. ACT will re-setup on the hole Monday to try to close the hole.

PZ24 – 0.7’

PZ35 – 80’

PZ36 – 3’

PZ40 – 11’

PZ41 – 0.6’

PZ58 – 0.6’

PZ39 – 0.6’

PZ61 – 0.1’

DXS2232

1st 15’ Gravity grouting 844 gallons

Overburden Soils PZs Big Clifty Sst PZs

Beech Creek Lst PZs Elwren Shale PZs2015 Profile

PZ24 – 0.7’

PZ35 – 80’

DXS2232

1st 15’ Gravity grouting 844 gallons

Top of hole

Top of rock

Grouting started @ 730, ended @0945

Grouting started @ 730, ended @0945

PZ Grouted Up started @ 730, ended @0945

Grouting started @ 730, ended @0945

PZ40 – 11’

PZ58 – 0.6’ DXS2232

1st 15’ Gravity grouting 844 gallons

Top of hole

Top of rock

PZ36 – 3’

PZ41 – 0.6’

DXS2232

1st 15’ Gravity grouting 844 gallons

Top of hole Top of rock

Grouting started @ 730, ended @0945

Grouting started @ 730, ended @0945

730, ended @0945

Grouting started @ 730, ended @0945

PZ39 – 0.6’

PZ61 – 0.1’

DXS2232

1st 15’ Gravity grouting 844 gallons

Top of hole

Top of rock

Regrout 2/22/2016 1202 to 1717 Grouted hole DXS2232 again for downstage grouting. Packer was set at a depth of 115' and target pressure was 69 psi.

Grouting started at 1202-1325 with A-Mix Grout pumping approximately 371 gallons into the hole.

The injection pressure was at 69 psi so B-Mix grout started at 1325 and took 249 gallons of grout. At 1527, C-Mix was started to close up the hole.

122 gallons CF of C-Mix grout was pumped into hole to reach refusal. The total grout injected today was 742 gallons.

The total gallons to reach closure was 1586 gallons.

PZ40 – 8’ PZ39 – 0.3’

DXS2232

Regrout 15’ Gravity grouting Additional 742 gallons

Horizontal Drain PZs Beech Creek Lst PZs

PZ51 – 0.3’

1202, ended @1717

Grouting started @ 1202, ended @1717

Grouting started @ 1202, ended @1717

DXT2237

DXT2237 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

DXT2237

Water Pressure Testing

Field Notes: 06/29 – WPT- DXT2237 0944-1050/132-152’; Stg.

2 from 142-152’ took 1.7 lug.

Geology Notes:

Geotech Notes:

Hole Grouting

Field Notes: 04/28 - DXT2237 (Gravity Grout) 1026-1116 and took 3 gal. at 52 psi

06/29 - Full Depth Grouting - DXT2237 1146-1311/113.1-152.0’ with no significant takes; Water testing and grouting resulted in a 7’ jump in PZ40.

DXP2242

DXP2242 W912QR25R0016_CERT_Final_Vol6_ PH1B_DrillFMCR_18of20_E2-0000

Beech Creek – No Infill

Beech Creek – No Infill

Clayey Shale

Clayey shale (Big Clifty), 130 – 139.5’ with non-continuous infill:

133.6’, 134.7’, 136.6-136.7’

Grout take information: stage 130-140 feet, took 34.08 gallons.

DXT2247

105.6-115.4’

Big Clifty SS: 3.6-8.3’; Sandstone, orange, hard; Partings at 2-6” intervals; Thin (1/8”) clay beds from 5.9-6.4’; Clay filled part form 6.4- 6.55’; Highly fractured layer from 7.6-7.9’.

115.4-126.7’

Big Clifty SS: 0.0-4.3’; Desc. from above; Partings at 2-6” intervals;

Highly fractured zone from 1.2-1.7’;

Clay filled parting at 3.2’; 3 Gray sandstone pebbles at the bottom of the run 1-2” wide.

DXT2247 casing grout took 74.94 gallons, 2.5 ft stage length

115.4-126.7’

Big Clifty SS: 0.0-4.3’; Desc. from above; Partings at 2-6” intervals;

Highly fractured zone from 1.2-1.7’;

Clay filled parting at 3.2’; 3 Gray sandstone pebbles at the bottom of the run 1-2” wide.

105.6-115.4’

Big Clifty SS: 3.6-8.3’; Sandstone, orange, hard; Partings at 2-6” intervals; Thin (1/8”) clay beds from 5.9-6.4’; Clay filled part form 6.4- 6.55’; Highly fractured layer from 7.6-7.9’.

DXS2252

hole

Top of rock

PZ11 - .08’

Horiz. Drain PZs Overburden Soils PZs

Reelsville PZs Haney PZs

PZ2 - .12’

PZ30 – 0.08’

VW78C - .07’

WV84A - .04’

DXS2252, Interface Grouting, 45 gal.

1011-1023

Field Notes Wednesday, 12/16/15:

The track mounted sonic rig started shift set up on DXS2252 with hole to full depth. Grout cart 19-10-05 (only operational grout cart through the morning), set up to begin grouting the bag. The bag was grouted starting at 0750, and took 7.7 gallons. The first stage of the annular space was completed at 0846, and took 74.9 gallons. Cascade removed casing and moved off the hole. The interface was grouted from 1008 to 1024 (when grout came to the surface of the annular space). It took 44.7 gallons, but ACT flushed the annular space down to 35 feet almost immediately after grouting.

The track mounted sonic rig and grout cart moved to DXP2122. The second stage of annular space was grouted from 0926 to 1051, and took 101 gallons. Cascade removed the casing and moved off the hole.

hole

Top of rock

DXS2252, Interface Grouting, 45 gal.

1011-1023

Grouting started @ 1011, ended @1023

Grouting started @ 1011, ended @1023

Grouting started @ 1011, ended @1023 hole

Top of rock

DXS2252, Interface Grouting, 45 gal.

1011-1023

• 107-124.65, 196.75 gallons

• 103-107, 44.72 gallons

• 140-155 (Beech Creek), 1222.5 gallons

• Grouted DXS2252 1003-1538; Stg. 3 from 140-155’ and took a total of 1218 gal. (489 gal.

of A-mix, 155 gal. of B-mix, 387 gal. of C-mix, and 187 of D-mix), the hole did not refuse and was still accepting ~5 g/min. at 90 psi when operations ceased. The water cart washed the hole upon termination and lost return fluid immediately. The operation was ceased. See bottom of this entry for special PZ details.

• Manual Readings were required for PZ40 during grouting of DXS2252 because the pressure transducer in the borehole flatlines at a peizometric pressure of 500 feet.

Manual readings were taken on the following intervals included below. It should be noted that instantaneous reactions were observed between the grouting operation and the PZ, including the gate operation at 1200 hours. It is estimated that the PZ has the ability to jump 25-30 feet in the matter of a minutes. At 14:10 grouting operations were terminated because the piezometric pressure reached to within 10 feet of the ground surface. 45 minutes later grouting was resumed at a lower pressure and grout was accepted until Plant 1 ran out of cement.

• Beech Creek, 140-155

• No pictures of drilling this depth

DXT2257

• Beech Creek Down Hole Survey Pictures (no pictures of beech creek drilled)

• Casing grout 103.04-106.04 took 80.63

1046 – Begin Grouting DXP2262 from 104-120’ 1116 – Begin Coring DXP2162 1125 – First Sample pulled on DXP2162 1127 – Pressure Spikes occur in DXP2262 1130 – Grouting and coring temporarily haulted 1302 – Coring completed/restart grouting 1402 – Grouting completed

- Approximately 361 gallons of grout

DXP2162 – DXP2262 Hole Communication

ALL HOLES BETWEEN THESE TWO BOREHOLES WERE NOT ADVANCED TO BC LIMESTONE YET

DXP2262

• Top of rock

• Cased grout 100-104’ took 59.25 gallons

Big Clifty Sandstone and Shale Valley Stress Fracturing

Present both U/S and D/S of the Dam

DXP2262 from 104-120’ Big Clifty SS and Shale

DXP2262 from 138.5-148.5’ Beech Creek LS

• 114-119.7’ took 631.15 gallons

• Beech Creek

Tuesday, 03/08/16:

The track rig set up on hole UXP2162 at 1448 to 1753 encountered weathered Big Clifty Sandstone and Big Clifty Shale overlying the Beech Creek Limestone. The top of the Beech Creek was at 143 with the socket extending to a depth of 147 fbgs.

Wednesday, 03/09/16:

The track rig assisted cart 1 with grouting UXP2162 grouting the barrier bag from 736-807 taking 1.8 gallons at 34 psi. The 1st annular space was grouted from 810-831 taking 99 gallons of grout at 63 psi.

U

XP

UXP2162

PZ-24

Re-drill for DXT2147 = new hole DXT2145

UXP2162 – rock drilling from 1448-1753 (initiated ~10’ drop)

UXP2162 –

Grouting annular space from 810-831 (initiated ~20’ rise)

Stilling Basin (-7.5’)

Tailwater (-0.5’)

PZ35

(-1.4’)

PZ42

(-4.0’) PZ40

(-1.5’)

PZ58

(-7.1’)

PZ36

(-1.1’)

PZ41

(-0.8’)

PZ24

(-0.3’)

De…