Solicitation_No___140R6021R0024_File_2_(Drawings).pdf

PDF 16 MB Posted Jul 9, 2021

Attached to: ALTUS EAST B AND LUGERT DIKES FOUNDATION MODIFICAT
Solicitation number: 140R6021R0024
Issued by: Department of the Interior Bureau of Reclamation

About this file

Written by GovTribe AI · Dec 28, 2023

This solicitation is for the Altus East B and Lugert Dikes Foundation Modifications project at the Altus Dam in Oklahoma. The Bureau of Reclamation is seeking proposals to modify the foundations of the Altus East B and Lugert Dikes, which are part of the W.C. Austin Project. Offerors must submit proposals by the closing date of January 24, 2022. The solicitation number is 140R6021R0024. The selected contractor will be awarded a firm fixed-price contract to complete the specified modifications to strengthen the dike foundations.

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Other files

File	Type	Posted
Subcontracting_Plan_Template_-_140R6021R0024_0002.docx	DOCX document	Aug 10, 2021
Amendment_No__0002_0002.pdf	PDF	Aug 10, 2021
Amendment_No__0001_0001.pdf	PDF	Jul 30, 2021
Sol_140R6021R0024_Amd_0001.pdf	PDF	Jul 30, 2021
Solicitation_No__140R6021R0024_File_4_(Drill_Logs).pdf	PDF	Jul 9, 2021
Solicitation_No__140R6021R0024_File_3_(Geology_Drawings).pdf	PDF	Jul 9, 2021
Sol_140R6021R0024.pdf	PDF	Jul 9, 2021
Solicitation_No__140R6021R0024_File_1.pdf	PDF	Jul 9, 2021

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62 62

LEGEND

Government property boundary

River

Railroad

Paved road

Dirt road

County line

State highway

U.S. highway

Interstate highway

Altus Reservoir

Government property

NOTES

1. For general notes see (60110).

2. For survey information see 258-600-500.

3. Reservoir limits shown at approximate El. 1549.0, 10.0 feet below reservoir surface at top of conservation pool (El. 1559.0).

Reservoir boundary, see Note 3

East Dike D

Kiowa CountyGreer County

N or th S ho re

R d

E1460 Rd

Fa rm ra il

Ra ilr oa d

E1450 Rd

R d

E1440 Rd/ North Shore rd

E1470 Rd

Railroad embankment

Quartz Mountain Nature Park

Auxiliary DikeTo Altu s

South Dike

Main dam

E1470 Rd

Nor th

Fo rk

R ed

R ive r

Lo dg e Rd

Altus Reservoir

North Dike

Lawton

SnyderAltus

Hobart

Elk City Foss

Clinton

Tulsa

Oklahoma City

Granite

Altus Reservoir

Lugert Dike

REFERENCES

258-D-60110_ _ _ _ _Site and Access Plan - 1 of 2 258-600-500_ _ _ _ _ _ _ _ _ _ _Survey Control

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MAP

VICINITY AND LOCATION

DENVER, CO YYYY-MM-DD

East Dike C

East Dike B

North Fork Red River

East Dike A

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.01 15:29:41 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.01 17:47:45 -07'00'

LEGEND

Government property boundary

Railroad

Paved road

Dirt road

Building / structure

Powerline

Contractor use area

Recreation area

Existing gate

NOTES

1. For survey information see 258-600-500.

2. For work and transit performed near powerlines, equipment clearance must comply with Reclamation Safety and Health Standards.

3. Aerial image is for reference only and may not represent present existing conditions at site.

4. For East trench drain pipe alignment, see reference drawings (60060) through (60063) and (60065).

5. No public access on East Dike crest road or access road onto government property.

6. Contractor use of the crest road will not be permitted North of the turnaround area.

REFERENCES

258-D-60111_ _ _ _Site and Access Plan - 2 of 2 258-600-500 _ _ _ _ _ _ _ _ _ _ _Survey Control

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Transit required below powerline

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SITE AND ACCESS

PLAN - 1 OF 2

DENVER, CO YYYY-MM-DD

No access to dike from E1450 Rd

GENERAL NOTES

1. Reservoir limits shown at approximate El. 1549.0, 10.0 feet below reservoir surface at top of conservation pool (El. 1559.0).

2. Aerial image is for reference only and may not represent present existing conditions at site.

3. Survey control is in local (ground plane) coordinates, using U.S.

survey foot units. Additional information regarding survey control is presented on 258-600-500.

4. Dimensions are in feet on all drawings unless otherwise noted.

Contractor use area

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.01 15:34:31 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.01 17:56:40 -07'00'

Government property boundary

Railroad

Paved road

Dirt road

Building / structure

Powerline

Contractor use area

Recreation area

Existing gate

County line

NOTES

1. For general notes see (60110).

2. For survey information see 258-600-500.

3. Water for site use is available from the reservoir in accordance with specification section 01 50 00-Temporary Utilities. Water can be obtained at the public boat ramp. Contractor may use water tanks. Water tank will not be located on paved surfaces.

4. No access to Lugert Dike from Highway 44 to be permitted at this location.

5. For work and transit performed near powerlines, equipment clearance must comply with Reclamation Safety and Health Standards.

6. Contractor use area only to be to stripped where used, in accordance with Section 31 14 10 of the specifications.

7. Aerial image is for reference only and may not represent present existing conditions at site.

8. For East trench drain pipe alignment, see reference drawings (60060) to (60063) and (60065).

9. For Lugert trench drain pipe see reference drawings (60068) through (60071) and (60074).

10. No public access on Lugert Dike crest road or access roads onto government property.

11. Contractor may use this portion of the contractor use area for temporary access road to the downstream area of Lugert Dike in accordance with specific section 01 55 00 Vehicular Access and Parking

M at ch lin e

8- D

-6

Limits of government property

Farmrail Railroad

Lodge R d

R d

East Dike B

Existing gate

REFERENCES

258-D-60110_ _ _ _Site and Access Plan - 1 of 2 258-600-500 _ _ _ _ _ _ _ _ _ _ _Survey Control

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SITE

SITE AND ACCESS

PLAN - 2 OF 2

DENVER, CO YYYY-MM-DD

Lugert trench drain pipe, see Note 9. see (60112) and (60113)

East trench drain pipe, see Note 8.

See (60114)

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.01 15:39:20 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.01 17:58:02 -07'00'

LAR M TA IOCE N

NOTES

1. For general notes see (60110).

2. For survey information see 258-600-500.

3. Trench drain pipe shall be protected from construction and delivery traffic in accordance with specification section 01 55 00

- Vehicular Access and Parking.

4. Contour interval is 2-feet.

5. Piezometer to be protected in accordance with specifications 01

56 10 - Protection of Existing Installations.

6. Piezometer to be cut off and raised in accordance with specifications 31 09 20 - Piezometers and (60127).

7. For Lugert trench drain pipe alignment, see reference drawings

(60068) though (60071) and (60074).

8. Crossing of swale for construction and delivery traffic shall be in accordance with specification section 01 55 00 - Vehicular Traffic and Parking.

9. Dike axis shown for reference to geologic plan drawing 258-600-60056.

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PLAN

LUGERT DIKE EXISTING

CONDITIONS

DENVER, CO 2021-02-01

Farmrail railroad line

Access road

Lugert Dike crest road

Altus Reservoir

Limits of government property

Highway 44

Access road

M at ch lin e

8- D

-6

LEGEND

Government property boundary

Railroad

Paved road

Dirt road

Powerline

Existing gate

Swale

Lugert trench drain pipe

Lugert Dike axis

Benchmark

Existing gate, no dike access

Private property

Lugert trench drain pipe, see Notes 3 and 7

REFERENCES

258-D-60110_ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111_ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 258-D-60113_ _ _Lugert Dike Existing Conditions - 2 of 2 258-D-60127_ _ _ _ __ _ _ _ _ _ _ _ _ _ _ Piezometers 258-600-500_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Survey Control 258-600-60056 _ Lugert Dike Geologic Cross Section A-A

Existing weir at railroad culvert

Limits of government property

Outfall trench

Flow

Swale extents, see Note 8

Flow See Note 5

See Note 5

See Note 6

Lugert Dike crest El. 1573.0'

Swale extents, see Note 8

Lugert Dike axis, see Note 9

Sand stockpile

Access well L4

Access well L5

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

Topography not shown

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.04 15:45:29 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:15:11 -07'00'

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PLAN

LUGERT DIKE EXISTING

CONDITIONS

DENVER, CO 2021-02-01

Access road

Lugert Dike crest El. 1573.0'

Lugert Dike crest road

Altus Reservoir

Limits of government property

Swale extents, see Note 7

M at ch lin e

8- D

-6

Access road

Limits of government property

Private property

Lugert trench drain pipe, see Note 3 and 8

Connector trench

REFERENCES

258-D-60110_ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111_ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 258-D-60112_ _ _Lugert Dike Existing Conditions - 1 of 2 258-D-60127_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Piezometers 258-600-500_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Survey Control 258-600-50056 _ Lugert Dike Geologic Cross Section A-A

Flow

See Note 6

LEGEND

Government property boundary

Railroad

Paved road

Dirt road

Powerline

Existing gate

Swale

Lugert trench drain pipe

Lugert Dike axis

Benchmark

See Note 6See Note 6 See Note 6

See Note 5

See Note 5 See Note 6

See Note 5

See Note 5 See Note 5

Lugert Dike access ramp Access road

Swale extents, see Note 7

Lugert Dike axis, see Note 9

Sand stockpile

Access well L2

Access well L3

Lugert trench inspection well

NOTES

1. For general notes see (60110).

2. For survey information see 258-600-500.

3. Trench drain pipe shall be protected from construction and delivery traffic in accordance with specification section 01 55 00

- Vehicular Access and Parking.

4. Contour interval is 2-feet.

5. Piezometer to be protected in accordance with specifications 01

56 10 - Protection of Existing Installations.

6. Piezometer to be cut off and raised in accordance with specifications 31 09 20 - Piezometers and (60127).

7. For Lugert trench drain pipe alignment, see reference drawings

(60068) though (60071) and (60074).

8. Crossing of swale for construction and delivery traffic shall be in accordance with specification section 01 55 00 - Vehicular Traffic and Parking.

9. Dike axis shown for reference to geologic plan drawing 258-600-60056.

Access well L1

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.04 15:48:37 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:17:25 -07'00'

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PLAN

EAST DIKE B EXISTING

CONDITIONS

DENVER, CO 2021-02-01

E14060 Rd

East Dike B crest, El. 1573.0'

Altus Reservoir

Limits of government property

Access road

East Dike B crest road

M at ch lin e

8- D

-6

Private property

Private property East trench drain pipe, see Note 3 and 7

NOTES

1. For general notes see (60110).

2. For survey information see 258-600-500.

3. Trench drain pipe shall be protected from construction and delivery traffic in accordance with specification section 01 55 00

- Vehicular Access and Parking.

4. Contour interval is 2-feet.

5. Piezometer to be protected in accordance with specification section 01 56 10 - Protection of Existing Installations.

6. Piezometer to be cut off and raised in accordance with specification section 31 09 20 - Piezometers and (60127).

7. For East trench drain pipe alignment, see reference drawings

(60060) through (60063) and (60065).

8. Crossing of swale for construction and delivery shall be in accordance with specification section 01 55 00 - Vehicular Traffic and Parking.

9. Dike axis is show for reference to geologic plan drawing 258-600-60051.

Existing gate and dike access

Existing gate

Limits of government property

Connector trench

REFERENCES

258-D-60110_ _ _ _ _ _ _ _Site and Access Plan - 1 of 2 258-D-60111_ _ _ _ _ _ _ _Site and Access Plan - 2 of 2 258-D-60115_ _ East Dike B Existing Conditions - 2 of 2 258-D-60127_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Piezometers 258-600-500_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Survey Control 258-600-50051_ _ East Dike Geologic Cross Section A-A

LEGEND

Government property boundary

Dirt road

Swale

East trench drain pipe

East Dike B axis

Benchmark

Paved road

Powerline 1+

See Note 5

See Note 6

See Note 5 See Note 5

Swale extents, see Note 8

See Note 5

Existing road culvert

Swale extents, see Note 8

Flow

Sand stockpile

East trench inspection well

Access well E5

Access well E4

East Dike B axis, see Note 9

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.04 15:51:26 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:18:53 -07'00'

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PLAN

EAST DIKE B EXISTING

CONDITIONS

DENVER, CO 2021-02-01

East Dike B crest El. 1573.0'

Altus Reservoir

Limits of government property

Access road

East Dike B crest road

M at ch lin e

8- D

-6

Private property

East trench drain pipe, see Notes 3 and 6

NOTES

1. For general notes see (60110).

2. For survey information see 258-600-500.

3. Trench drain pipe shall be protected from construction and delivery traffic in accordance with specification section 01 55 00

- Vehicular Access and Parking.

4. Contour interval is 2-feet.

5. Piezometer to be cut off and raised in accordance with specification section 31 09 20 - Piezometers and (60127).

6. For East trench drain pipe alignment, see reference drawings

(60060) through (60063) and (60065).

7. Crossing of swale for construction and delivery traffic shall be in accordance with specification section 01 55 00 - Vehicular Traffic and Parking.

8. Survey control point EB2 not shown on drawing, see control point table.

9. Dike axis shown for reference to geologic plan drawing 258-600-60051.

REFERENCES

LEGEND

Government property boundary

Dirt road

Swale

East trench drain pipe

East Dike B axis1+

See Note 5

Swale extents, see Note 7

* See Note 8

Swale extents, see Note 8

Flow

Sand stockpile

Access well E5

Access well E2

Access well E1

EB2 not shown on drawing, see survey control points table

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

East Dike B axis, see

Note 9

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.04 15:34:48 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:21:34 -07'00'

Crest of dike at El. 1573.0'

End of CB slurry cutoff wall at Sta. 42+00

CB slurry cutoff wall alignment centered along Lugert Dike crest

Altus Reservoir

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

0 100' 200'

NOTES

1. For general notes see 258-D-60110.

2. For survey information see 258-600-500.

3. CB slurry cutoff wall excavation shall extend a minimum of 5' below top of shale bedrock, in accordance with specification 31 56 20 "Cement Bentonite Slurry Cutoff Wall." In areas where Qal is in direct contact with granite, CB slurry cutoff wall to terminate at top of granite, in accordance with the specifications.

4. Existing instrumentation, and access and inspections wells not shown, see drawing 258-D-60113 for existing instrumentation.

5. CB slurry cutoff wall excavation sections and details shown on drawings (60122) and (60123).

6. Stationing provided is for centerline of Cement Bentonite Slurry Cutoff Wall. See drawing 258-D-60113 for dike axis stationing.

7. Locations of measuring points are approximate and to be approved in the field. If measuring point cannot be driven the full seven feet, relocate measuring point to a nearby location.

REFERENCES

258-D-60110 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 258-D-60113_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert Dike Existing Condition 2 of 2 258-600-500 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Survey Control 258-600-60056 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert Dike - Geologic Cross Section - A-A'-A" 258-D-60117 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert Dike CB Slurry Cutoff Wall Excavation - 2 of 2 258-D-60120 _ _ _ _ _ _ _ Lugert and East Dike B - Existing Conditions - Typical Sections and Detail 258-D-60121 _ _ _ _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Rockfill Excavation - Typical Sections 258-D-60122 _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Excavation - Sections and Details 258-D-60123 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Cap and Crest - Details 258-D-60124 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Downstream Face Reconstruction - Sections

10' from center of dike to crest edge, see note 5

Horizontal limit of CB slurry cutoff wall excavation at Sta. 42+00

0 100' 200'

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PLAN & PROFILE

LUGERT DIKE CB

SLURRY CUTOFF WALL

DENVER, CO 2020-08-01

Lugert trench drain pipe and swale not shown, see dwg. (60113)

Bottom of CB slurry cutoff wall, see Note 3 Approximate top of Shale (Phy)

Approximate Top of Granite

(Clg) in left abutment, see note 3

Approximate Embankment/Qal contact

Limits of temporary rockfill stockpile, to within 2.0' of access road limits, see dwg. (60121)

Top of CB slurry cutoff wall at El.

1572.5'

Lugert Dike crest limits, El. 1573.0'

Existing access road

See Note 5

M at ch lin e D w g

D -6

21+00 68' 568992.41 1584358.03

22+00 66' 569073.24 1584299.16

23+00 60' 569152.51 1584238.20 24+00 60' 569230.16 1584175.19

25+00 61' 569306.13 1584110.18

26+00 61' 569380.39 1584043.20

27+00 62' 569452.87 1583974.31

28+00 66' 569523.52 1583903.55

29+00 70' 569592.31 1583830.97

30+00 74' 569659.18 1583756.61

CB Slurry Cutoff Wall Table

Station Excavation Depth see Note 3

31+00 72' 569724.92 1583681.26

32+00 70' 569790.66 1583605.91

33+00 68' 569856.39 1583530.55

34+00 65' 569927.30 1583449.28

35+00 63' 569922.13 1583455.19

36+00 61' 569987.87 1583379.84

37+00 59' 570119.34 1583229.13

38+00 56' 570185.08 1583153.77

39+00 53' 570250.98 1583078.41

40+00 48' 570316.56 1583003.06

41+00 23' 570382.30 1582927.70

42+00 2' 570448.03 1582852.34

CB Slurry Cutoff Wall Table

Station Excavation Depth see Note 3

Existing access road

Lugert Dike crest road

Northing EastingNorthing Easting

LEGEND

Paved road Cement-Bentonite (CB) Slurry Cutoff Wall

Dirt road Rockfill Stockpile Extents

Embankment CB slurry cutoff wall axis Measuring Point

Shale (Phy)

CB Slurry Cutoff Wall Stationing

See Note 6 Qal

Embankment

20.0'

Granite (Clg)

See drawing (60123) for trimmed CB slurry cutoff wall elevation

NOT TO SCALE NOT TO SCALE

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.03 21:21:20 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:22:52 -07'00'

Crest of dike at El. 1573.0'

Bottom of CB slurry cutoff wall, see Note 3

Start of CB slurry cutoff wall at Sta. 0+00

CB slurry cutoff wall alignment centered along Lugert Dike crest

Altus Reservoir

0 100' 200'

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

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PLAN & PROFILE

LUGERT DIKE CB

SLURRY CUTOFF WALL

DENVER, CO 2020-08-01

0 100' 200'

Horizontal limit of CB slurry cutoff wall excavation at Sta. 0+00

Lugert Dike trench drain pipe and swale, not shown, see dwg. (60112)

LEGEND

Paved road Cement-Bentonite (CB) Slurry Cutoff Wall

Dirt road Rockfill Stockpile Extents

Embankment CB slurry cutoff wall axis Measuring Point

0+00 5' 567038.91 1585054.01

1+00 29' 567138.56 1585045.90

2+00 34' 567237.98 1585035.20

3+00 40' 567337.09 1585021.90

4+00 45' 567435.82 1585006.02

5+00 49' 567534.10 1584987.57

6+00 52' 567631.87 1584966.56

7+00 55' 567729.05 1584943.00

8+00 57' 567825.58 1584916.92

9+00 59' 567921.40 1584888.32

Approximate Top of Granite (Clg) in right abutment, see Note 3

Limits of temporary rockfill stockpile, to within 2.0' of access road limits, see dwg. (60121)

Top of CB slurry cutoff wall at El. 1572.5'

10' from center of dike to crest edge, see Note

Lugert Dike Crest Limits El. 1573.0'

Approximate Top of

Shale (Phy)

Existing Access Roads

See Note 5

NOTES

1. For general notes see (60109).

2. For survey information see (258-600-500).

4. Existing instrumentation and access wells not shown, see drawing 258-D-60112 for existing instrumentation.

5. CB slurry cutoff wall excavation sections and details shown on drawings (60122) and (60123).

6. Stationing provided is for centerline of Cement Bentonite Slurry Cutoff Wall. See drawing 258-D-60112 for dike axis stationing.

7. For measuring point details, see drawing 258-D-60116.

M at ch lin e D w g

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CB Slurry Cutoff Wall Table

Station Excavation Depth see note 3

10+00 60' 568016.45 1584857.23

11+00 60' 568110.64 1584823.67

12+00 62' 568203.93 1584787.66

13+00 64' 568299.25 1584749.23

14+00 64' 568387.53 1584708.41

15+00 65' 568477.72 1584665.21

16+00 65' 568566.75 1584619.67

17+00 65' 568654.55 1584571.83

18+00 69' 568741.08 1584521.70

19+00 71' 568826.27 1584469.34

20+00 69' 568910.07 1584414.77

CB Slurry Cutoff Wall Table

Station Excavation Depth see note 3

REFERENCES

258-D-60110 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 258-D-60112 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert Dike Existing Conditions - 1 of 2 258-600-500 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Survey Control 258-600-60056 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert Dike - Geologic Cross Section - A-A'-A" 258-D-60116 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert Dike CB Slurry Cutoff Wall Excavation - 1 of 2 258-D-60120 _ _ _ _ _ _ _ Lugert and East Dike B - Existing Conditions - Typical Sections and Detail 258-D-60121 _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Rockfill Excavation - Typical Sections 258-D-60122 _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Excavation - Sections and Details 258-D-60123 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Cap and Crest - Details 258-D-60124 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Downstream Face Reconstruction - Sections

Lugert Dike crest road

Northing Easting Northing Easting

Shale (Phy)

Approximate Embankment/Qal contact

OK-44

Railroad

CB Slurry Cutoff Wall Stationing

See Note 6

Qal

Embankment

20.0'

Granite (Clg)

See drawing (60123) for trimmed CB slurry cutoff wall elevation

*See note 7

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.03 21:29:51 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:23:49 -07'00'

Horizontal limit of CB slurry cutoff wall at Sta.

34+00

East Dike B axis, see dwg. (60115)

CB slurry cutoff wall alignment centered along East Dike B crest

Altus Reservoir

M at ch lin e D w g

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0 100' 200'

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

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PLAN & PROFILE

EAST DIKE B CB

SLURRY CUTOFF WALL

DENVER, CO 2020-08-01

0 100' 200'

LEGEND

Paved road Cement-Bentonite (CB) Slurry Cutoff Wall

Dirt road Rockfill stockpile extents

Embankment CB slurry cutoff wall axis measuring point

NOTES

1. For general notes see (60109).

2. For survey information see (258-600-500).

3. CB slurry cutoff wall excavation shall extend a minimum of 5' below top of shale bedrock, in accordance with specification section 31 56 20 "Cement-Bentonite Slurry Cutoff Wall." In areas where Qal is in direct contact with granite, CB slurry cutoff wall to terminate at top of granite, in accordance with the specifications.

4. Existing instrumentation and access wells not shown. See drawing 258-D-60115 for location of existing instrumentation.

5. CB slurry cutoff wall excavation sections and details shown on drawings (60121) and (60122).

6. Stationing provided is for centerline of Cement Bentonite Slurry Cutoff Wall. See drawing 258-D-60115 for dike axis stationing.

7. For measuring point details, see drawing 258-D-60116.

Crest of dike at El. 1573.0'

End of CB slurry cutoff wall at Sta. 34+00

Bottom of CB slurry cutoff wall, see Note 3

Approximate top of Shale (Phy)

Approximate embankment/Qal contact

Existing Access Road

10.0' from center of dike to crest edge, see Note 5

East Dike B Crest Limits, El. 1573.0'

20.0' wide crest

See Note 5

Limits of temporary rockfill stockpile, to within 2.0' of access road limits, see dwg. (60121)

18+00 46' 573970.48 1585225.19

19+00 45' 573051.67 1585283.57

20+00 44' 574132.87 1585341.95

21+00 43' 574214.06 1585400.33

22+00 41' 574295.25 1585458.70

23+00 40' 574376.44 1585517.08

24+00 38' 574457.63 1585575.46

25+00 37' 574538.82 1585633.83

26+00 35' 574620.62 1585691.34

27+00 34' 574705.14 1585744.77

CB Slurry Cutoff Wall Table

Station Excavation Depth see Note 3 28+00 33' 574792.36 1585793.63

29+00 31' 574882.02 1585837.92

30+00 30' 574973.89 1585877.39

31+00 30' 575067.71 1585911.97

32+00 29' 575163.22 1585941.57

33+00 28' 575260.15 1585966.10

34+00 28' 575358.24 1585986.50

CB Slurry Cutoff Wall Table

Station Excavation Depth see Note 3

5.0'

REFERENCES

258-D-60110 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 258-D-60115 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ East Dike Existing Conditions - 2 of 2 258-600-500 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Survey Control 258-600-60051 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ East DIke - Geologic Cross Section - A-A'-A" 258-D-60119 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ East Dike B CB Slurry Cutoff Wall Plan and Profile - 2 of 2 258-D-60120 _ _ _ _ _ _ _ Lugert and East Dike B - Existing Conditions - Typical Sections and Detail 258-D-60121 _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Rockfill Excavation - Typical Sections 258-D-60122 _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Excavation - Sections and Details 258-D-60123 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Cap and Crest - Details 258-D-60124 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Downstream Face Reconstruction - Sections

East Dike B crest road

East trench drainpipe and swale, not shown, see dwg.

(60115)

Northing Easting Northing Easting

Shale (Phy)

Cement Bentonite

Slurry Cutoff Wall Stationing

See Note 6

Qal Embankment

See drawing (60123) for trimmed CB slurry cutoff wall elevation Top of CB slurry cutoff wall at El. 1572.5'

*See note 7

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.03 21:33:08 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:24:53 -07'00'

Horizontal limit of CB slurry cutoff wall excavation at Sta. 1+00

CB slurry cutoff wall alignment centered along East Dike B crest

Altus Reservoir

0 100' 200'

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

T H

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PLAN & PROFILE

EAST DIKE B CB

SLURRY CUTOFF WALL

DENVER, CO 2020-08-01

0 100' 200'

NOTES

1. For general notes see (60109).

2. For survey information see (258-600-500).

4. Existing instrumentation, and access and inspection wells not shown. See drawing 258-D-60114 for location of existing instrumentation

5. CB slurry cutoff wall excavation sections and details shown on drawings (60122) and (60123).

6. Stationing provided is for centerline of Cement Bentonite Slurry Cutoff Wall. See drawing 258-D-60114 for dike axis stationing.

7. For measuring point details, see drawing 258-D-60116.

Start of CB slurry cutoff wall at Sta. 1+00

Bottom of CB slurry cutoff wall, see Note 3

Approximate top of

Shale (Phy)

Approximate embankment/Qal contact

Approximate top of Granite (Clg), see Note 3

Existing Access Road

10.0' from center of dike to crest edge, see note 5 East Dike B crest Limits, El. 1573.0'

20.0' wide crest

Crest of dike at El. 1573.0

Existing access roads

See Note 5

Limits of temporary rockfill stockpile, to within 2.0' of access road limits, see dwg. (60121)

M at ch lin e D w g

D -6

1+00 18' 572509.03 1584174.41

2+00 54' 572549.62 1584203.60

3+00 54' 572590.22 1584232.79

4+00 54' 572630.82 1584261.97

5+00 54' 572671.41 1584291.16

6+00 54' 572712.01 1584320.35

7+00 54' 572752.60 1584349.54 8+00 54' 572793.20 1584378.73

9+00 54' 572833.80 1584699.80

10+00 54' 572874.39 1584437.10

CB Slurry Cutoff Wall Table

Station Excavation Depth see Note 3

11+00 53' 572914.99 1584466.29

12+00 53' 572955.58 1584495.48

13+00 51' 572996.18 1584524.67

14+00 51' 573036.78 1584553.86

15+00 49' 573077.37 1584583.05

16+00 48' 573117.97 1584612.24

17+00 48' 573158.56 1584641.42

CB Slurry Cutoff Wall Table

Station Excavation Depth see Note 3

5.0'

REFERENCES

258-D-60110 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 258-D-60114 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ East Dike Existing Conditions - 1 of 2 258-600-500 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Survey Control 258-600-60051_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ East Dike - Geologic Cross Section - A-A'-A" 258-D-60118 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ East Dike B CB Slurry Cutoff Wall Excavation - 1 of 2 258-D-60120 _ _ _ _ _ _ _ Lugert and East Dike B - Existing Conditions - Typical Sections and Detail 258-D-60121 _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Rockfill Excavation - Typical Sections 258-D-60122 _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Excavation - Sections and Details 258-D-60123 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Cap and Crest - Details 258-D-60124 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Downstream Face Reconstruction - Sections

East Dike B crest road

East trench drain pipe and swale, not shown, see dwg. (60114)

Northing EastingNorthing Easting

LEGEND

Paved road Cement-Bentonite (CB) Slurry Cutoff Wall

Dirt road Rockfill stockpile extents

Embankment CB slurry cutoff wall axis measuring point

Shale (Phy)

Existing ground surface

Cement Bentonite Slurry Cutoff Wall Stationing

See Note 6

Embankment Qal and Qea Granite

(Clg)

See drawing (60123) for trimmed CB slurry cutoff wall elevation Top of CB slurry cutoff wall at El. 1572.5'

*See note 7

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.03 21:36:52 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:26:06 -07'00'

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

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LUGERT AND EAST DIKE

B - EXISTING

CONDITIONS

TYPICAL SECTIONS AND

DETAIL

DENVER, CO 2020-08-01

NOTES

1. For general notes see (60110).

2. Top of shale shown on drawings does not incorporate decomposed materials overlying shale bedrock. See specification 53 10 00 for additional information.

3. Zone 5 consists of rockfill placed during the previous dike raise, which shall be protected in accordance with Specification 31 56 10 Cement Bentonite Slurry Cutoff Wall.

4. Trench drain pipe shall be protected from construction and delivery traffic in accordance with Specification 01 55 00 - Vehicular Traffic and Parking.

5. Crossings of the swale by construction and delivery traffic shall be in accordance with Specification 01 55 00 - Vehicular Traffic and Parking.

6. Section callouts shown in section present the drawing number on which the section appears. Drawing numbers are truncated to show a five-digit numbers (i.e. 258-D-60108 is shown as 60108). Section titles also refer back to the section and use the same truncated drawing number format.

7. Qea is present at East Dike only.

8. Zones 2, 3 and 4 are shown on reference drawings (60065) and

(60074) and are not used in this modification.

LEGEND

Riprap

Zone 5

Zone 1

Gravel Surfacing

Geotextile

Approximately 2 feet thick REFERENCES

258-D-60110 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 258-D-60112 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert Dike Existing Conditions - 1 of 2 258-D-60113 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert Dike Existing Conditions - 2 of 2 258-D-60114 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ East Dike B Existing Conditions - 1 of 2 258-D-60115 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ East Dike B Existing Conditions - 2 of 2 258-D-60121 _ _ _ _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Rockfill Excavation - Typical Sections 258-D-60122 _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Excavation - Sections and Details 258-D-60123 _ _ _ _ _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Cap and Crest - Details 258-D-60124 _ _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Downstream Face Reconstruction - Sections

0 20' 40'10'

60120 NOT TO SCALE

0 20' 40'10'

MATERIAL DESCRIPTION

Impervious materials consisting of silty clays and clayey sands with gravel, compacted in 6" layers.

Zone 2 not used in this modification, see Note 8.

Zone 3 not used in this modification, see Note 8.

Zone 4 not used in this modifiation, see Note 8.

Rockfill material ranging from 18" to 3" in size placed during the 2018 dike modifications.

Materials excavated from the cement-bentonite (CB) slurry cutoff wall trench, in accordance with specifications.

Gravel Minus 1.5" sand and gravel with 4-12% passing the No. 200 Surfacing sieve, in accordance with specifications.

Existing Dumped and placed boulders and cobbles, placed as part of Rockfill construction in the 1940's. Range of rockfill size is unknown.

Significant amounts of organic material has accumulated within the existing rockfill since construction of the dikes.

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.04 14:29:24 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:27:28 -07'00'

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

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LUGERT AND EAST DIKE

B - ROCKFILL

EXCAVATION

TYPICAL SECTIONS

DENVER, CO 2020-08-01

NOTES

1. For General Notes, see (60110).

2. Excavate rockfill from downstream face of dike prior to excavating cement bentonite cutoff wall. Depth of rockfill is approximately 2 feet, but actual depth is unknown. Excavation depths shown on drawings are subject to changes as to adapt excavated rockfill to conditions disclosed by excavation.

Excavated rockfill will be temporarily stockpiled near downstream toe of dike.

3. Zone 5 rockfill on downstream face to remain in place during construction and shall be protected from cutoff wall spoil contamination in accordance with specification section 31 56 20

- Cement Bentonite Slurry Cutoff Wall .

4. Top of shale bedrock shown on drawings does not incorporate decomposed materials overlying bedrock. See specification 53 10 00 for additional information.

5. Rockfill stockpile shall be sized to contain cement-bentonite slurry cutoff wall spoils.

6. Strip material between toe of dike and access road to receive stockpiled rockfill in accordance with specification section 31 14 10 Stripping.

7. Access road gravel surfacing at downstream toe of dikes and and dike crest access ramps contaminated by construction activities shall be removed and replaced in accordance with specification section 32 15 10 Gravel Surfacing.

8. Qea is present at East Dike only.

9. Zones 2, 3 and 4 are shown on reference drawings (60065) and

(60074) and are not used in this modification.

REFERENCES

258-D-60110 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 285-D-60116 _ _ _ _ _ _ _ _ Lugert Dike CB Slurry Cutoff Wall Excavation Plan and Profile - 1 of 2 258-D-60117 _ _ _ _ _ _ _ _ Lugert Dike CB Slurry Cutoff Wall Excavation Plan and Profile - 2 of 2 258-D-60118 _ _ _ _ _ _ _ _ East Dike B CB Slurry Cutoff Wall Excavation Plan and Profile - 1 of 2 258-D-60119 _ _ _ _ _ _ _ _ East Dike B CB Slurry Cutoff Wall Excavation Plan and Profile - 2 of 2 258-D-60120 _ _ _ _ _ _ _ Lugert and East Dike B - Existing Conditions - Typical Sections and Detail 258-D-60122 _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Excavation - Sections and Details 258-D-60123 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Cap and Crest - Details 258-D-60124 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Downstream Face Reconstruction - Sections

0 20' 40'10'

MATERIAL DESCRIPTION

Impervious materials consisting of silty clays and clayey sands with gravel, compacted in 6" layers.

Zone 2 not used in this modification, see Note 9.

Zone 3 not used in this modification, see Note 9.

Zone 4 not used in this modification, see Note 9.

Rockfill material ranging from 18" to 3" in size placed during the 2018 dike modifications.

Materials excavated from the cement-bentonite (CB) slurry cutoff wall trench, in accordance with specifications.

Gravel Minus 1.5" sand and gravel with 4-12% passing the No. 200 Surfacing sieve, in accordance with specifications.

Existing Dumped and placed boulders and cobbles, placed as part of Rockfill construction in the 1940's. Range of rockfill size is unknown.

Significant amounts of organic material has accumulated within the existing rockfill since construction of the dikes.

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.04 14:32:14 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:28:29 -07'00'

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

T H

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SHEET

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LUGERT AND EAST DIKE

B - CB SLURRY CUTOFF

WALL AND EXCAVATION

SECTIONS AND DETAILS

DENVER, CO 2020-08-01

60122 NOT TO SCALE

NOTES

1. For General Notes, see (60110).

2. Center of cement bentonite slurry cutoff wall to be located at the center of crest of dike as shown on drawings (60116), (60117), (60118), and (60119).

3. Zone 6 materials consist of cement-bentonite slurry cutoff wall excavation spoils. In areas where Zone 6 cannot be staged at the dike toe, contractor shall temporarily stockpile spoils in contractor use areas, to be used to rebuild the downstream face of the dike.

4. CB slurry cutoff wall excavation shall extend a minimum of 5 feet below top of shale bedrock, or as determined by COR in the field, in accordance with the specifications.

5. CB slurry cutoff wall excavation that encounters granite shall extend to and stop at the soil-granite contact, in accordance with the specifications.

6. Top of shale bedrock shown on drawings does not incorporate decomposed materials overlying bedrock. See specification 53 10 00 for additional information.

7. Install silt fence at upstream crest, along downstream edge of riprap, in accordance with specification section 31 25 10 Erosion Control.

8. Level gravel surfacing on the crest of the dikes to create a working pad to vertically excavate the slurry cutoff wall in accordance with specification section 31 24 20 Cutoff Wall Spoils.

9. Section callouts shown in section present the drawing number on which the section appears. Drawing numbers are truncated to show a five-digit numbers (i.e. 258-D-60108 is shown as 60108). Section titles also refer back to the section and use the same truncated drawing number format.

10. Geotextile not shown, see drawing (60120). Do not damage geotextile during leveling of gravel surface to create working pad.

11. Qea is present at East Dike only.

12. Zones 2, 3 and 4 are shown on reference drawings (60065) and

(60074) and are not used in this modification.

0 20' 40'10'

REFERENCES

258-D-60110 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 285-D-60116 _ _ _ _ _ _ _ _ Lugert Dike CB Slurry Cutoff Wall Excavation Plan and Profile - 1 of 2 258-D-60117 _ _ _ _ _ _ _ _ Lugert Dike CB Slurry Cutoff Wall Excavation Plan and Profile - 2 of 2 258-D-60118 _ _ _ _ _ _ _ _ East Dike B CB Slurry Cutoff Wall Excavation Plan and Profile - 1 of 2 258-D-60119 _ _ _ _ _ _ _ _ East Dike B CB Slurry Cutoff Wall Excavation Plan and Profile - 2 of 2 258-D-60120 _ _ _ _ _ _ Lugert and East Dike B - Existing Conditions - Typical Sections and Detail 258-D-60121 _ _ _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Rockfill Excavation - Typical Sections 258-D-60123 _ _ _ _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Cap and Crest - Details 258-D-60124 _ _ _ _ _ _ _ _ Lugert and East Dike B - Downstream Face Reconstruction - Sections

60122 NOT TO SCALE 60122 NOT TO SCALE

MATERIAL DESCRIPTION

Impervious materials consisting of silty clays and clayey sands with gravel, compacted in 6" layers.

Zone 2 not used in this modification, see Note 12.

Zone 3 not used in this modification, see Note 12.

Zone 4 not used in this modification, see Note 12.

Rockfill material ranging from 18" to 3" in size placed during the 2018 dike modifications.

Materials excavated from the cement-bentonite (CB) slurry cutoff wall trench, in accordance with specifications.

Gravel Minus 1.5" sand and gravel with 4-12% passing the No. 200 Surfacing sieve, in accordance with specifications.

Existing Dumped and placed boulders and cobbles, placed as part of Rockfill construction in the 1940's. Range of rockfill size is unknown.

Significant amounts of organic material has accumulated within the existing rockfill since construction of the dikes.

60122 NOT TO SCALE

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.04 14:36:43 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:29:26 -07'00'

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

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LUGERT AND EAST DIKE

B - DOWNSTREAM FACE

RECONSTRUCTION

SECTIONS

DENVER, CO 2020-08-01

NOTES

1. For General Notes, see (60110).

2. Zone 6 materials consist of cement-bentonite slurry cutoff wall excavation spoils. In areas where Zone 6 cannot be staged on the dike face, contractor shall temporarily stockpile spoils in contractor use areas, to be used to rebuild the downstream face of the dike.

3. Contractor shall allow Zone 6 adequate time to drain and become workable prior to final downstream face construction.

4. Final spoils placement shall be constructed in lifts with each lift not exceeding 18" normal to the face and compacted by tracked equipment. Finish spoil surface shall be covered with stockpiled rockfill.

5. The limits shown for Zone 6 are approximate and were based on the excavated volumes from the cutoff wall excavation, including the wasted slurry. The actual limits for Zone 6 are expected to vary.

6. After completion of the CB Slurry Cutoff Wall, remove and replace contaminated gravel surfacing on access roads at downstream toe of dikes and dike crest access ramps, in accordance with specification 32 15 10 Gravel Surfacing.

7. Section callouts shown in section present the drawing number on which the section appears. Drawing numbers are truncated to show a five-digit numbers (i.e. 258-D-60108 is shown as 60108). Section titles also refer back to the section and use the same truncated drawing number format.

8. Qea is present at East Dike only.

9. Zones 2, 3 and 4 are shown on reference drawings (60065) and

(60074) and are not used in this modification.

6 , see Notes 2, 3, 4 and 5

0 20' 40'10'

REFERENCES

258-D-60110 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 1 of 2 258-D-60111 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Site and Access Plan - 2 of 2 285-D-60116 _ _ _ _ _ _ _ _ _ Lugert Dike CB Slurry Cutoff Wall Excavation Plan and Profile - 1 of 2 258-D-60117 _ _ _ _ _ _ _ _ _ Lugert Dike CB Slurry Cutoff Wall Excavation Plan and Profile - 2 of 2 258-D-60118 _ _ _ _ _ _ _ _ _ East Dike B CB Slurry Cutoff Wall Excavation Plan and Profile - 1 of 2 258-D-60119 _ _ _ _ _ _ _ _ _ East Dike B CB Slurry Cutoff Wall Excavation Plan and Profile - 2 of 2 258-D-60120 _ _ _ _ _ _ _ Lugert and East Dike B - Existing Conditions - Typical Sections and Detail 258-D-60121 _ _ _ _ _ _ _ _ _ _ _ _ _ Lugert and East Dike B - Rockfill Excavation - Typical Sections 258-D-60122 _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Excavation - Sections and Details 258-D-60123 _ _ _ _ _ _ _ _ _ Lugert and East Dike B - CB Slurry Cutoff Wall Cap and Crest - Details

MATERIAL DESCRIPTION

Impervious materials consisting of silty clays and clayey sands with gravel, compacted in 6" layers.

Zone 2 not used in this modification, see Note 9.

Zone 3 not used in this modification, see Note 9.

Zone 4 not used in this modifiation, see Note 9.

Rockfill material ranging from 18" to 3" in size placed during the 2018 dike modifications.

Materials excavated from the cement-bentonite (CB) slurry cutoff wall trench, in accordance with specifications.

Gravel Minus 1.5" sand and gravel with 4-12% passing the No. 200 Surfacing sieve, in accordance with specifications.

Existing Dumped and placed boulders and cobbles, placed as part of Rockfill construction in the 1940's. Range of rockfill size is unknown.

Significant amounts of organic material has accumulated within the existing rockfill since construction of the dikes.

RONALD OAKS Digitally signed by RONALD OAKS Date: 2021.02.04 14:44:05 -07'00'

CHRISTOPHER SLAVEN Digitally signed by CHRISTOPHER SLAVEN Date: 2021.02.08 12:31:42 -07'00'

CHECKED

TECH. APPR.

APPROVED

PEER REVIEWER - CIVIL ENGINEER, P.E.

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LUGERT AND EAST

DIKE B - CB SLURRY

CUTOFF WALL CAP

AND CREST

DETAILS

DENVER, CO 2020-08-01

NOTES

1. For General Notes see (60110).

2. Center of cement bentonite slurry cutoff wall to be located at the center of crest of dike as shown on drawings (60116), (60117), (60118), and (60119).

3. Trim cement bentonite slurry cutoff wall to elevation 1572.0 prior to placing Zone 1 slurry cutoff wall cap, in accordance with specification section 31 56 20 Cement Bentonite Slurry Cutoff Wall.

4. Cement bentonite slurry cutoff wall cap shall consist of compacted Zone 1 embankment fill placed to Elevation 1572.5, in accordance with specification section 31 24 11 Zone 1 Impervious…

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