bolivar dam - aegweb.org

BUILDING STRONG®

BOLIVAR DAMGROUT CURTAIN CONSTRUCTION

Muskingum River Basin, OH

AEG Annual MeetingSeptember 2016

Mike Nield, GeologistU.S. Army Corps of Engineers, Huntington WVLRD Dam Safety Production CenterDam Safety Modification Mandatory Center of Expertise

For Official Use Only (FOUO) - Unclassified

BUILDING STRONG®

BOLIVAR DAM GROUTING - OUTLINE

A. SITE CONDITIONS

B. GROUT CURTAIN CONSTRUCTION

C. GROUT CURTAIN RESULTS

1. Project Location2. Site Geology3. Past Performance - Seepage

Slide 2 of 67

BUILDING STRONG®

MUSKINGUM WATERSHED Located in eastern Ohio,

within Muskingum River Watershed

Muskingum Watershed

OHIO

KYWV

MI

Tuscarawas River

Muskingum River

Walhonding River

USACE Dams

System of 16 USACEdams, most built in 1930’s

Dam/Levee Reevaluation Changing Criteria Poor Performance

During High-Water Events Portfolio of Dams

Prioritization based on Risk Assessments

This system of dams was the nation’s first to impound water for regional flood control

BUILDING STRONG®

BOLIVAR DAM

OHIO

MI

Tuscarawas River

Muskingum River

Walhonding River

USACE Dams

Earthen dam, constructed in 1938

Muskingum Watershed

KYWV

BOLIVAR DAM

“Run of River”

Located on Sandy Creek, a tributary of the Tuscarawas River

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Pool of Record – El. 951.630 year event

Dam Left Abutment

Dam Right Abutment)

Dam (main embankment)

Tailwater El. 906(backup from Dover Dam Pool)

BOLIVAR DAM

POOL OF RECORD – JAN 2005

Intake Structure

6,400’ Dam Length 87’ Dam Height (main) Founded Mostly on

Glacial Outwash Left Abutment Founded

on Bedrock

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GEOLOGY

BOLIVAR DAM

Near-horizontal sedimentary rock

Pennsylvanian aged Pottsville Group

Typically joints are high angled with smooth and planar surfaces.

Interbedded sandstone, shale, siltstone, claystonewith thin seams of coal and limestone

Solutioned discontinuities are common in thin limestone units.

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GLACIAL GEOLOGY

BOLIVAR DAM

Unglaciated

Located near the ice margins of Illinoian and Wisconsin glacial periods

Typically, +100 foot thick proglacial soil deposits within valley bottom.

Site geology Influenced by glacial lakes and outwash.

BUILDING STRONG®

LOCAL GLACIAL GEOLOGY

Wisconsin Ice Margin

IllinoianIce Margin

BOLIVAR DAM

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(El. 950 to 920 feet) Onsite Borrow Area for seepage blanket extension/augmentation work – downstream of right abutment

Dam Embankment

~200 feetfoundation thickness

~45 ft. terrace thickness

DAM FOUNDATION - PROFILE

Glacial Outwash (sands & gravel) Bedrock

Top of Rock

Bedrock

Left Abutment

Right Abutment

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SEEPAGE DURING FLOOD EVENTS

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Terrace Foundation Sand Eroded Out

Emergency Filter Placement on Terrace

Overflowing relief well nearing inundation by Dover Dam pool

Artesian flow from piezometer even with extension

Flow through open joints in bedrock in left abutment of dam

SEEPAGE DURING FLOOD EVENTS

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Pervious sands, gravels, & cobbles with open work gravel zones as well as thin silt lenses/ layers

highly erodible poorly graded

sands

RISK ASSESSMENT

Continuity of Erodible Sand Layers?

Risk assessment resulted in actionable failure modes (internal erosion through foundation sands) DSAC II rating (urgent)

Tolerable Risk Limit

ACTION WARRANTED

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SEEPAGE BARRIER* 4,519 FEET LONG* UP TO 144 FEET DEEP* 2 FEET MIN. THICK

GROUT CURTAIN* DOUBLE LINE* 394 FEET LONG* 65 FOOT AVG. DEPTH

SEEPAGE REMEDIATION MEASURES SEEPAGE BARRIER & GROUT CURTAIN

INTAKE STRUCTURE

SPILLWAY

UPSTREAM

DOWNSTREAM

STILLING BASIN

DAM

DAM

COMPLETED REMEDIATION MEASURESSlope FiltersDownstream Filter BermsRehab Relief WellsADAS Instrumentation

BUILDING STRONG®


A. SITE CONDITIONS


C. GROUT CURTAIN RESULTS

1. Project Location2. Site Geology3. Past Performance - Seepage

1. Potential Failure Mode2. Grout Curtain Design3. Construction Methods

Slide 23 of 67

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STILLING BASIN

INTAKE STRUCTURE

APPROXIMATE LOCATION OF SEEPAGE BARRIER

BEDROCK SEEPAGE – LOCATION

LEFT ABUTMENT

HYPOTHETICAL SEEPAGE PATHS

FLOOD EVENT

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2005 FLOOD EVENT 1991 FLOOD EVENT

BEDROCK SEEPAGE – LEFT ABUTMENT

LOCATION ABOVE STILLING BASIN

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LIMESTONE

LEFT ABUTMENT – GEOLOGY

TOP OF ROCK

Soil: (colluvium – fines w/ rock frag.) approx. 16’ thick Bedrock: Near horizontal, interbedded, sedimentary bedrock Two thin limestone units (Upper and Lower Mercer Limestone)

Profile Along Grout Curtain Centerline – Looking Upstream

SOIL

BEDROCKOUTLET TUNNELS

SPILLWAY

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UPPER AND LOWER MERCER LIMESTONE

DOWN-THE-HOLE CAMERA IMAGESOPEN FRACTURES AT SURFACE

SEEPAGE DURING FLOOD EVENT

LOWER MERCER LIMESTONE

Limestone Units: thin (3’ to 5’ thick), regionally continuous, very hard, high UCS (as high as 32,000 psi).

Joints: high angle, solutioned, approx. 5’ spacing, joint set at 90o, interconnected, avenues for groundwater flow.

Bedding planes: low angle, open, solutioned and continuous.

Exposed in stilling basin and spillway.

Feet

HIGH ANGLED JOINT

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UPPER MERCER LIMESTONE

LOWER MERCER LIMESTONE

LIMESTONE EXCAVATION / OUTCROP

STILLING BASIN – CONSTRUCTION PHOTO (1936)

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STILLING BASIN

INTAKE STRUCTURE APPROXIMATE

LOCATION OF SEEPAGE BARRIER

BEDROCK SEEPAGE – POTENTIAL FAILURE MODE

EXISTING SPILLWAY SILL GROUT CURTAIN (1989)

LEFT ABUTMENT

SCOUR/EROSION OF DAM EMBANKMENT


FLOOD EVENT

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STILLING BASIN

INTAKE STRUCTURE APPROXIMATE

LOCATION OF SEEPAGE BARRIER

BEDROCK SEEPAGE – REMEDIATION

EXISTING SPILLWAY SILL GROUT CURTAIN (1989)

LEFT ABUTMENT


LOCATION OF GROUT CURTAIN

FLOOD EVENT

EXTEND SEEPAGE BARRIER KEYED INTO BEDROCK

REDUCED GROUNDWATER VELOCITY

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GROUT CURTAIN – GENERAL DESIGN

PLAN VIEW

GROUT CURTAIN (394’ LENGTH)

SEEPAGE BARRIER

EXISTING SPILLWAY GROUT CURTAIN (1989)

10’ OVERLAPOVERLAP

400’ length grout curtain

N

BUILDING STRONG®

GROUT CURTAIN – GENERAL DESIGN Double line grout curtain, 10’ spacing between grout lines

All Primary and Secondary holes were grouted. Higher order grout holes were split spaced, when needed.

3” diameter grout holes


BUILDING STRONG®


1000

950

900

4+00G3+00G2+00G1+00G0+00G64+00B63+00B62+00B

Existing Spillway

Existing TunnelsBedrock

Soil

Top of RockTop of Ground

Seepage Barrier

Shale, Siltstone & Coal Sandstone LimestoneSoil (colluvium)

Grout Curtain (1989)

BOTTOM OF CURTAIN (elev. 924)

BOTTOM OF ZONE (elev. 950)

ZONE 1

ZONE 2

Double line grout curtain, 10’ spacing between grout lines 3” diameter grout holes

65’ depth, bottom elev. 924 (below limestone units) Two zones (treat upper and lower limestones separately)


GEOLOGIC PROFILE – LEFT ABUTMENT (looking upstream)


BUILDING STRONG®

1000

950

900

4+00G3+00G2+00G1+00G0+00G64+00B63+00B62+00B

Grout Holes

Existing Spillway


Soil


Seepage Barrier


Downstream holes inclined 30o toward spillway (intersect high angled joints)

Double line grout curtain, 10’ spacing between grout lines 400’ length grout curtain.







BUILDING STRONG®

1000

950

900

4+00G3+00G2+00G1+00G0+00G64+00B63+00B62+00B

Grout Holes

Existing Spillway


Soil


Seepage Barrier


Upstream holes inclined 30o toward dam/valley (intersect high angled joints) Downstream holes inclined 30o toward spillway (intersect high angled joints)




Double line grout curtain, 10’ spacing between grout lines 400’ length grout curtain.




BUILDING STRONG®

CONSTRUCTION Contract awarded to Treviicos

Seepage Barrier: panel method, excavated with hydromill, backfilled with low strength concrete

Grout Curtain: subcontracted to TerraFirm

Construction Award Cost: $44 million

Notice to Proceed Date: May 2014

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ClaystoneUpper Limestone

InterbeddedSH/SS/Coal


Not to Scale

TYPICAL GROUT HOLE

Top of Rock

Lower Limestone

Soil

Top of Ground

Temporary Casing

Grout Seal

DRILLING THROUGH SOIL & INSTALL CASING Grouting was subcontracted to Terra Firm Hole location and drill mast orientation was surveyed Auger drilling method through soil without drilling

fluids, used crawler-mounted Davey Kent drills Installed temporary casing (PVC pipe) Place grout seal and grout annulus in two lifts

AUGER DRILL RIG

CASING

SURVEY

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Not to Scale

Top of Rock

Lower Limestone

Soil

Top of Ground

Temporary Casing

Grout Seal

924

TYPICAL GROUT HOLE

DRILLING THROUGH BEDROCK Water actuated down-hole hammer with crawler-mounted Gill Beetle drills Drill 3” diameter hole Bottom of grout curtain at elev. 924 Maximum drill length of 115’ Inclination 0o to 70o from vertical Hole sidewalls were cleaned Hole deviation was measured using

Boretrak or Gyroshot

DOWN-HOLE-HAMMER DRILL RIG

BORETRAK

CLEANING NOZZLE

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Not to Scale

Top of Rock

Lower Limestone

Soil

Top of Ground

Temporary Casing

Grout Seal

924

924

ZONE 1

ZONE 2

950Packer

To Water Pump

TYPICAL GROUT HOLE

PRESSURE TESTING Two Zones to treat upper and lower

limestone units separately Upstage grouting – preferred method Set double packer within zone Pressure is limited during pressure

testing and grouting to prevent hydraulic jacking

Computer monitored, using pressure transducers and flow meters

PRESSURE TEST CART

BUILDING STRONG®




Not to Scale

Top of Rock

Lower Limestone

Soil

Top of Ground

Temporary Casing

Grout Seal

924

924

ZONE 1

ZONE 2

950Packer

Grout Filled Fractures

To Grout Mixer

TYPICAL GROUT HOLE

GROUTING Six balanced stabilized grout mixes (range of viscosity and specific

gravity, <1% bleed, <0.05 Pressure Filtration, <16hr final set) Computer monitored grouting and pressure testing (Jean Lutz system) Typically start with thinner mixes and

incrementally increase viscosity Grouting refusal set at 0.5 gal/min

GROUT PLANT

GROUT MONITORING

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Not to Scale

Top of Rock

Lower Limestone

Soil

Top of Ground

Temporary Casing

Grout Seal

924

Void

TYPICAL GROUT HOLE

DOWNSTAGE GROUTING Downstage grouting if significant

drill water loss is encountered (+50%), indicating open foundation conditions.

Stage is pressure tested and grouted prior to deepening the hole.

924

950

BUILDING STRONG®


A. SITE CONDITIONS


C. GROUT CURTAIN RESULTS1. Grout Takes2. Closure Criteria3. Lessons Learned

1. Potential Failure Mode2. Grout Curtain Design3. Construction Methods

Slide 42 of 67

BUILDING STRONG®

GROUT RECORDS – UPSTREAM LINE

GROUT PROFILE – PRIMARY & SECONDARY HOLES(looking downstream)

ZONE 1

ZONE 2

950

924

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GROUT RECORDS – UPSTREAM LINE


Downstage GroutingSeepage Barrier


ZONE 1

ZONE 2

924

950

BUILDING STRONG®

GROUT RECORDS – DOWNSTREAM LINE


ZONE 1

ZONE 2

950

924

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GROUT RECORDS – DOWNSTREAM LINE


Downstage GroutingSeepage Barrier


ZONE 1

ZONE 2

950

924

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Soil (colluvium)

GROUT PLACEMENT – DOWNHOLE IMAGES

Shale, Siltstone & Coal Sandstone Limestone

Seepage Barrier

GEOLOGIC PROFILE – SHOWING DOWNSTAGE GROUT (looking downstream)

0+00 -0+500+501+502+002+503+003+50 1+004+00

1000

950

900

1000

950

900

Downstage Grouting

ZONE 1

ZONE 2950

UPP

ER M

ERC

ER L

IMES

TON

E

924

HOLE P140U - 30o21’

25’

26’

22’

23’

24’

CLA

YSTO

NE

GROUT

GROUT

CLA

YSTO

NE

BUILDING STRONG®



Seepage Barrier


0+00 -0+500+501+502+002+503+003+50 1+004+00

1000

950

900

1000

950

900

Downstage Grouting

ZONE 1

ZONE 2950

924

HOLE P140U - 30o

GROUT

GROUT

56’

59’

57’

58’

60’

61’

LOW

ER M

ERC

ER L

IMES

TON

EC

LAYS

TON

E

BUILDING STRONG®



Seepage Barrier


0+00 -0+500+501+502+002+503+003+50 1+004+00

1000

950

900

1000

950

900

Downstage Grouting

ZONE 1

ZONE 2950

924

GROUT

GROUT

LOW

ER M

ERC

ER L

IMES

TON

ESH

ALE

53’

56’

54’

55’

57’

HOLE P190U - 30o

BUILDING STRONG®



Seepage Barrier


0+00 -0+500+501+502+002+503+003+50 1+004+00

1000

950

900

1000

950

900

Downstage Grouting

ZONE 1

ZONE 2950

924

GROUT

GROUT

23’

26’

24’

25’

27’

28’

UPP

ER M

ERC

ER L

IMES

TON

EC

LAYS

TON

E

HOLE T145U - 30o

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Grout Curtain - Closure Criteria

Specified criteria for split-spaced higher-order grout holes was grout take being greater than 100 gallons.

Sequential reduction of grout takes and pressure test values for higher order grout holes (reduction in bedrock permeability).

Additional criteria for split-spacing by reviewing pressure test results of the highest-order grout holes to determine a risk-based and practical upper bound values (lugeonvalues).

Specified criteria for refusal during grouting was 0.5 gallons per minute.

Specified that Primary and Secondary holes were to be drilled, pressure tested and grouted (min. 10’ spacing).

Consensus from a cadre of professionals, upon review of data.

BUILDING STRONG®

0+00 G0+50 G1+00 G2+00 G2+50 G 1+50 G3+00 G3+50 G900

950

BOTTOM OF GROUT CURTAIN 924

TOP OF GROUND

900

1,000

TOP OF ROCKZONE 1

ZONE 2

1,000

Review of Pressure Test Results – Zone 2

SPILLWAY

OUTLET TUNNELS

ZONE BOUNDARY 950

SOILDAM

Profile - Grout Curtain

SEEPAGE BARRIER WALL

950

Upper bound Lugeon value of 10 for highest-order, pre-grouted holes (marginally groutable). Final average Lugeon value below 5 Resulted in adding 10 Higher-Order holes.

Seepage within Zone 2 has a higher probability of dam failure than Zone 1. Higher hydraulic gradient Increased frequency of pools Longer pool duration

BUILDING STRONG®

0+00 G0+50 G1+00 G2+00 G2+50 G 1+50 G3+00 G3+50 G900

950


TOP OF GROUND

900

1,000

TOP OF ROCKZONE 1

ZONE 2

1,000

SPILLWAY

OUTLET TUNNELS

ZONE BOUNDARY 950

SOILDAM

Profile - Grout Curtain

SEEPAGE BARRIER WALL

950

Review of Pressure Test Results – Zone 1

Seepage within Zone 1 has a lower probability of dam failure than Zone 2. Lower hydraulic gradient Decreased frequency of pools Shorter pool duration

Upper bound Lugeon value of 35 for highest-order grouted holes from sta 0+00G to 2+00G. Final average Lugeon value below 20 (higher than typical criteria) Resulted in adding 12 Higher Order holes.

BUILDING STRONG®

Upstream Grout Curtain – All Holes

0+00 G0+50 G1+00 G2+00 G2+50 G 1+50 G3+00 G3+50 G900

950

900

950

1,0001,000

Primary (20’)Secondary (10’)Tertiary (5’)Quaternary (2.5’)Quinary (1.25’)

Profile - Upstream Grout Curtain

Average hole spacing = 4.7’ 102 Total Holes, 50 Primary & Secondary, 52 Higher Order Holes Primary through Quinary Holes Approximately 4,600’ of grouted holes in bedrock 115,700 gal of grout

ZONE 1

ZONE 2

SOIL

TOP OF GROUND

TOP OF ROCK

ZONE BOUNDARY 950


SPILLWAY

DAM

BUILDING STRONG®

Upstream Curtain – Zone 2 – Closure – Higher Risk

0+00 G0+50 G1+00 G2+00 G2+50 G 1+50 G3+00 G3+50 G900

950

900

950

1,0001,000

Q01

2.5U

T025

UQ

017.

5U

T035

UQ

042.

5UQ

047.

5UT0

55U

Q06

2.5U

Q06

7.5U

T075

U S030

U

QU

283.

8U

Q08

2.5U

Q08

7.5U

T095

U

T105

UT1

15U

T145

U

T155

U

S130

U

T175

U

T185

U

T195

UT2

05U

T215

U

T225

U

T165

U

T235

UT2

45U

T255

U

T275

U

T295

UQ

287.

5U

QU

281.

3U

S379

F0U

S377

F20U

S379

F40U

S377

F60U

T085

U

T045

U

Q26

2.5U

Q26

7.5U

0.8

11

0 –5 Lugeon5 -10 Lugeon10 –15 Lugeon+ 15 Lugeon

6

3.6 2.20.9

14 11

12

10 910 9

0.4 0.3

2.4 1.3

2.9

3

8.1 90

1.4

0.8 4.1


1.6 1

4.4

1.4 0.8

1.91.33.3

2.8

1.73.1 1.8

1.8

4.6 3.6

2.31.1 1.6

S303

F-40

UQ

302F

-27.

5UQ

301F

-22.

5UT3

00.5

F-15

UQ

301F

12.5

UQ

300F

17.5

US3

01F0

UT3

00.5

F25U

8

17

LUGEON VALUES FROM PRE-GROUTED PRESSURE TESTS

Foundation Condition Median (Lu)

Average(Lu)

Standard Deviation

Hydraulic Conductivity

(cm/sec)Before Grouting(U/S primary holes) 15.5 30.8 35 4x10-4

Nearly Completed Grouting (highest-order grout holes) 2.4 3.9 3.7 5X10-5

Profile - Upstream Curtain – Highest-Order Grout Holes Only

Upper Bound Criteria = 10 Lu

BUILDING STRONG®

Upstream Curtain – Zone 1 – Closure – Low Risk

0+00 G0+50 G1+00 G2+00 G2+50 G 1+50 G3+00 G3+50 G900

950

900

950

1,0001,000

Q01

2.5U

T025

UQ

017.

5U

T035

UQ

042.

5UQ

047.

5UT0

55U

Q06

2.5U

Q06

7.5U

T075

U S030

U

QU

283.

8U

Q08

2.5U

Q08

7.5U

T095

U

T105

UT1

15U

T145

U

T155

U

S130

U

T175

U

T185

U

T195

UT2

05U

T215

U

T225

U

T165

U

T235

UT2

45U

T255

U

T275

U

T295

UQ

287.

5U

QU

281.

3U

S379

F0U

S377

F20U

S379

F40U

S377

F60U

T085

U

T045

U

Q26

2.5U

Q26

7.5U

8

36


29

0.7

20 18

41 26

2.9

20 50

82

7 54

272.6 36

S303

F-40

UQ

302F

-27.

5UQ

301F

-22.

5UT3

00.5

F-15

UQ

301F

12.5

UQ

300F

17.5

US3

01F0

UT3

00.5

F25U

33

24

15

13

6

29

33

323.7

8

67

12311.8

2.1

29

624212091.22.2

43

4418

21.44.1

3.6

2.32.2

45




Average (Lu)

Standard Deviation


(cm/sec)Before Grouting(U/S primary holes) 56.6 441 1,123 5x10-3


Profile - Upstream Curtain – Highest-Order Grout Holes Only


BUILDING STRONG®

0+00 G0+50 G1+00 G2+00 G2+50 G 1+50 G3+00 G3+50 G900

950

900

1,0001,000

Downstream Grout Curtain – All Holes

SPILLWAY


DAM

950

Profile - Downstream Grout Curtain

Average hole spacing = 7.7’ 68 Total Holes, 46 Primary & Secondary, 22 Higher Order Holes Primary through Quaternary Holes Approximately 3,100’ of grouted hole in bedrock 12,800 gal of grout

ZONE 1

ZONE 2

SOIL

TOP OF GROUND

TOP OF ROCK

ZONE BOUNDARY 950


BUILDING STRONG®

0+00 G0+50 G1+00 G2+00 G2+50 G 1+50 G3+00 G3+50 G900

950

900

1,000

SPILLWAY

S-00

9F10

DS-

007F

30D

S010

D

S150

D

T025

D

S090

D

S050

D

T035

D

S070

D

T135

DT1

25D

Q11

2.5D

T105

D

Q11

7.5D

S270

D

T165

D

T175

D

Q19

7.5D

T185

DQ

192.

5D

S250

D

S230

D

S210

D

Q29

2.5D

T285

D

Q29

7.5D

S301

F-40

D

S376

F60D

S377

F20D

S379

F40D

T378

.5F5

DT3

84F0

D

S030

D

0.6 2.5 0.9 0.5 1.3 1.2 3 0.8 4.310 9 715 137

2 3.7

10 0.9

0.6

2.2 0.7

0.7

2.7 4

0.311 0 1.2

517

Downstream Curtain – Zone 2 – Closure – Higher Risk

0.8

11


6


17

950



Average(Lu)

Standard Deviation


(cm/sec)Before Grouting(U/S primary holes) 15.5 30.8 35 4x10-4


Profile - Downstream Curtain – Highest-Order Grout Holes Only


BUILDING STRONG®

0+00 G0+50 G1+00 G2+00 G2+50 G 1+50 G3+00 G3+50 G900

950

900

1,000

SPILLWAY

S-00

9F10

DS-

007F

30D

S010

D

S150

D

T025

D

S090

D

S050

D

T035

D

S070

D

T135

DT1

25D

Q11

2.5D

T105

D

Q11

7.5D

S270

D

T165

D

T175

D

Q19

7.5D

T185

DQ

192.

5D

S250

D

S230

D

S210

D

Q29

2.5D

T285

D

Q29

7.5D

S301

F-40

D

S376

F60D

S377

F20D

S379

F40D

T378

.5F5

DT3

84F0

D

S030

D

8

36


29

45


9501.4 2713

15 2812 31 22 17 260.9

0.7

0.82

0

651

48 46 52 1115

0

16 1210

772.4

1.72.7

Downstream Curtain – Zone 1 – Closure – Low Risk

Profile - Downstream Grout Curtain



Average (Lu)

Standard Deviation


(cm/sec)Before Grouting(U/S primary holes) 56.6 441 1,123 5x10-3


Profile - Downstream Curtain – Highest-Order Grout Holes Only


BUILDING STRONG®

Grout Placed – All Holes

0

20,000

40,000

60,000

80,000

Grout Placed - All Holes (gal)

Downstream Upstream

GROUT PLACED - All Holes (gal)Upstream Downstream subtotal

Primary 78,627 8,453 87,081Secondary 33,953 3,412 37,365Tertiary 2,421 857 3,278Quaternary 588 80 668Quinary 81 81

subtotal: 115,671 12,802

128,473:Total Grout Placed (gal)

0

20

40

60

80

PrimarySecondary Tertiary

QuaternaryQuinary

Grout Placed Per Linear Foot (gal/lf)

Downstream Upstream

GROUT PLACED PER LINEAR FOOT (gal/lf)Upstream Downstream subtotal

Primary 63.66 7.61 37.12Secondary 30.89 3.13 17.07Tertiary 1.64 1.43 1.58Quaternary 0.89 0.27 0.80Quinary 0.80 0.80

subtotal: 25.26 4.13

16.73:Grout Placed Per Linear Foot (gal/lf)

Total Cement Placed (cf): 8,659 Cement Placed per LF (cf/lf): 1.13 (estimated 0.33)

BUILDING STRONG®

Grout Placed – Grout Line/Zone

0

20,000

40,000

60,000

80,000

Grout Placed - Upstream Line (gal)

Zone 2 Zone 1

GROUT PLACED - UPSTREAM LINE (gal)Zone 1 Zone 2 subtotal

Primary 52,014.1 26,613.3 78,627Secondary 11,973.9 21,979.4 33,953Tertiary 723.5 1,697.7 2,421Quaternary 319.8 268.5 588Quinary 14.4 66.4 81

subtotal: 65,046 50,625

115,671:Total Grout Placed - Upstream (gal)

0

2,000

4,000

6,000

8,000

10,000

Grout Placed - Downstream Line (gal)

Zone 2 Zone 1 Grout Placed: 54% Zone 1, 46% Zone 2 Grout Placed: 90% Upstream Line, 10% Downstream

GROUT PLACED - DOWNSTREAM LINE (gal)Zone 1 Zone 2 subtotal

Primary 2,671 5,782 8,453Secondary 1,069 2,343 3,412Tertiary 167 690 857Quaternary 8 72 80Quinary 0

subtotal: 3,916 8,887

12,802:Total Grout Placed - Downstream (gal)

BUILDING STRONG®

Pressure Test & Downstages

0

20

40

60


QuaternaryQuinary

Pre-grouted Pressure Test (Median Lu)

Downstream Upstreasm

PRESSURE TEST - MEDIAN LUGEONUpstream Downstream

Primary 41.5 17.4Secondary 28.5 15.0Tertiary 8.9 8.6Quaternary 7.9 1.5Quinary 2.3

01020

30

40

50

60


QuaternaryQuinary

Total Number of Downstages (ea)

Downstream Upstream

TOTAL NUMBER OF DOWNSTAGES (ea)Upstream Downstream subtotal

Primary 57 7 64Secondary 18 5 23Tertiary 3 3Quaternary 0Quinary 0

subtotal: 78 12

90:Total Number of Downstages (ea)

80% of grout placed during downstaging

BUILDING STRONG®

Grout Placed – Grout Mix

0

2

4

6

Mix A Mix B Mix C Mix D Mix E Mix F

Grout Placed – Downstream Line - By Mix (gal/lf)

Quinary Quaternary Tertiary Secondary Primary

GROUT PLACED - UPSTREAM LINE - BY MIX (gal/lf)Mix A Mix B Mix C Mix D Mix E Mix F

(36 sec) (41 sec) (58 sec) (127 sec) (high gum) (sanded)

Primary 23.42 13.50 7.75 5.47 1.93 11.58Secondary 10.46 5.25 2.97 1.75 1.25 9.21Tertiary 1.60 0.04Quaternary 0.89Quinary 0.80

0

5

10

15

20

25

Mix A1 Mix B Mix C Mix D Mix E Mix F

Grout Placed - Upstream Line -By Mix (gal/lf)

Quinary Quaternary Tertiary Secondary Primary

GROUT PLACED - DOWNSTREAM LINE - BY MIX (gal/lf)Mix A Mix B Mix C Mix D Mix E Mix F

(36 sec) (41 sec) (58 sec) (127 sec) (high gum) (sanded)

Primary 5.11 1.70 0.59 0.10Secondary 1.90 0.44 0.19Tertiary 1.43Quaternary 0.27Quinary

BUILDING STRONG®

Grouting Quantities

DESCRIPTION UNITORIGINAL QUANTITY (+ mod 28)

FINAL ESTIMATED QUANTITY

PERCENT (+/-)

Drilling and Grouting - Mobilization and Demobilization JOB 1 1 0

Hole Drilling in Overburden and Casing Installation LF 2,200 2,122 -4

Hole Drilling in Rock LF 7,070 8,889 26

Hole Re-Drilling LF 2,100 1,071 -49

Reconnections for Downstaging EA 55 86 56

Pressure Testing EA 321 446 39

Optical Televiewer Survey LF 580 243 -58

Placing Grout HR 240 426 78

Stand-by Time for Grouting HR 17 0 -100

Portland Cement In Grout CF 2,400 8,712 263

Sand in Grout LBS 4,465 84,365 1789

Bentonite in Grout LBS 5,850 22,397 283

Admixtures in Grout GAL 510 4,790 839

Modification 0028 expanded the scope of the grout curtain, as a result of IEPR comments.Quantities are approximate and have not been finalized at the time of this presentation.

BUILDING STRONG®

Lessons Learned

“You’re done when you’re done” (need for closure criteria)

“Been There – Done That” doesn’t always apply to “Being Here – Doing This”

“I don’t need no stinking Microsoft Access” (need for data management)

“We’ve rarely use a sanded mix” (estimating quantities)

Only one more slide!

BUILDING STRONG®

FINALIZING SITE WORK

GROUT CURTAIN COMPLETED NOVEMBER 2015

SEEPAGE BARRIER & GROUTING: STATUS

SEEPAGE BARRIER COMPLETED APRIL 2016

BUILDING STRONG®Marietta OH1913 Flood

BOLIVAR DAMGROUT CURTAIN CONSTRUCTION

Muskingum River Basin, OH

Thank you!

bolivar dam - aegweb.org

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