Warm_Springs_Drawings.pdf

I-15 Exit 182 (Clancy)

I-15 Exit 176 (Jefferson City)

I-15 Exit 187

I-15 Exit 192

Warm Springs Creek Road

WARMS SPRINGS CREEK TAILINGS SITE

FR 4013

FR 226

FR 226

F

R

Helena

East Helena

Helena

SCALE (miles)

0 1 20.5

WARMS SPRINGS CREEK REPOSITORY SITE

www.tetratech.com

CLIENT INFORMATION:PROJECT LOCATION:

PROJECT DESCRIPTION / NOTES:

Tt PROJECT No.: CLIENT PROJECT No.:

114-560405

UNITED STATES DEPARTMENT OF AGRICULTURE

FOREST SERVICE REGION 1, P.O. BOX 7669

MISSOULA, MONTANA

JEFFERSON COUNTY, MONTANA

HELENA NATIONAL FOREST

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WARM SPRINGS CREEK PHASE 1 RECLAMATION PROJECT

HELENA NATIONAL FOREST

303 IRENE STREET

HELENA, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

1. FINAL FOR CONSTRUCTION 6/28/13

UNITED STATES DEPARTMENT OF AGRICULTURE

DIRECTOR OF ENGINEERING DATE

FOREST SUPERVISER DATE

DISTRICT RANGER DATE

FOREST ENGINEER DATE

ON SITE COORDINATOR DATE

COVER SHEET, INDEX AND SITE VICINITY MAP

ESTIMATED QUANTITIES

SITE LOCATION MAP

REPOSITORY SITE MAP

REPOSITORY EXCAVATION REQUIREMENTS

REPOSITORY CONSTRUCTION REQUIREMENTS

REPOSITORY CROSS SECTION

REPOSITORY CAP END DETAIL

REPOSITORY EROSION CONTROL DETAILS

CURTAIN DRAIN DETAIL

T3 AREA EXISTING CONDITION AND REMOVAL REQUIREMENTS

T3 AREA FINAL ELEVATIONS AFTER TAILINGS REMOVAL AND RECONSTRUCTION

OF MIDDLE FORK OF WARM SPRINGS CREEK

T4 AREA EXISTING CONDITION AND REMOVAL REQUIREMENTS

T4 AREA FINAL ELEVATIONS AFTER TAILINGS REMOVAL AND IN-PLACE

RECLAMATION OF MIDDLE FORK OF WARM SPRING CREEK

WARM SPRINGS CREEK EXISTING AND FINAL GROUND STREAM PROFILES

BOTH SIDES FLOODPLAIN SOIL REMOVAL AND RECONSTRUCTION DETAILS

BOULDER DROP STRUCTURE DETAILS

TYPICAL STREAM CHANNEL CONSTRUCTION CROSS SECTION DETAILS

EROSION CONTROL DETAILS

FINAL SITE MAP

REPOSITORY RE-VEGETATION REQUIREMENTS

T3 AREA RE-VEGETATION REQUIREMENTS

T4 AREA RE-VEGETATION REQUIREMENTS

SHEET INDEX

CAWLFIELD

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EXISTING INDEX CONTOURS

EXISTING INTERMEDIATE CONTOURS

PROPOSED INDEX CONTOUR

PROPOSED INTERMEDIATE CONTOURS

CONTROL POINTS

LEGEND

LARRY CAWLFIELD, P.E., DATE

CONSULTING PROJECT ENGINEER

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Copyright: Tetra Tech

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303 Irene Street Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

ESTIMATED QUANTITIES

TAILINGS DAM 3

TAILINGS DAM 1

TAILINGS DAM 2

TAILINGS DAM 4

PROJECT

CONTROL

POINT

APPROXIMATE ADIT LOCATION

FR 4016

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T1

T2

T3

T4

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APPROXIMATE LOCATION OF

EXISTING ACCESS ROAD

APPROXIMATE LOCATION OF

PROPOSED REPOSITORY

ACCESS ROAD

PROPOSED REPOSITORY

LOCATION

APPROXIMATE LOCATION OF

PROPOSED REPOSITORY

ACCESS ROAD

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PROJECT

CONTROL

POINTS

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

SITE LOCATION MAP

N

SCALE:

75' 150'

1" = 150'

NOTES:

1. PHASE 1 CONSTRUCTION INCLUDES ONLY

RECLAMATION WITH TAILINGS AREAS T3

AND T4. RECLAMATION IN TAILINGS AREAS

T1 AND T2 WILL BE ACCOMPLISHED UNDER

SEPARATE CONTRACT.

2. TAILINGS AREAS AND REPOSITORY

LOCATED IN A PORTION OF SECTION 30 IN

TOWNSHIP 8 N, RANGE 2 W.

3. ELEVATIONS SHOWN BASED ON

ARBITRARY LOCAL DATUM OF ELEVATION

1000.00 ASSIGNED TO POINT 10 NEAR THE

REPOSITORY.

PROJECT CONTROL POINTS

POINT

NUMBER

DESCRIPTION NORTHING EASTING ELEVATION

324 BM 29955.7200 30054.2300 5332.3540

10 SET 10000.0000 10000.0000 1000.0000

11 SET 10182.4300 10132.5500 1049.9000

SCALE:

100' 200'

1" = 200'

PROPOSED TEMPORARY SOIL

SORTING AND STOCK PILE AREAS

BID ITEM 3.1

PROPOSED REPOSITORY ACCESS ROAD BID ITEM 2.1

APPROXIMATE LOCATION OF EXISTING

ACCESS ROAD TO BE IMPROVED

BID ITEM 2.1

PROPOSED TEMPORARY SEDIMENT

SORTING AND STOCK PILE AREA

BID ITEM 3.1

APPROXIMATE LOCATION OF

EXISTING ACCESS ROAD

BID ITEMS 2.1

PROPOSED REPOSITORY

ACCESS ROAD

BID ITEMS 2.1

PROPOSED REPOSITORY

LOCATION

APPROXIMATE AREA OF CLEARING AND

GRUBBING OR AS DETERMINED BY CO.

BID ITEM 2.2

PROJECT CONTROL POINT

SOIL DESCRIPTION

USCS

CODE

DEPTH

(FEET)

SYMBOL

12'-25'

DECOMPOSED

GRANITE

SM

TYPICAL SOIL PROFILE

NOT TO SCALE

LIGHT BROWN

SILTY SAND

WITH GRAVEL,

COBBLES AND

BOULDERS

0'-12' www.tetratech.com

Copyright: Tetra Tech

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

REPOSITORY SITE MAP

N

SCALE:

50' 100'

1" = 100'

BID ITEM SECTION

2.1 COMPOSITE ROAD CONSTRUCTION, 204

2.2 CLEARING AND GRUBBING, 201

3.1 EXCAVATE REPOSITORY, SCREEN AND

STOCKPILE SOIL, 204

NOTES:

1) SEE PART I, SECTION C, APPENDIX C

FOR DRILL LOGS AND TEST PITS.

APPROXIMATE LOCATION OF

EXISTING ACCESS ROAD

NOTES:

1) EXCAVATIONS MUST MEET

CURRENT OSHA SAFETY

STANDARDS. PROVIDE

TEMPORARY SHORING AS

REQUIRED. EQUIPMENT

OUTSIDE OF EXCAVATION SHALL

MAINTAIN MIN. DISTANCE OF 20'

FROM CREST OF EXCAVATED

SLOPE DURING CONSTRUCTION.

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Copyright: Tetra Tech

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

REPOSITORY

EXCAVATION REQUIREMENTS

N

SCALE:

25' 50'

1" = 50'

BID ITEM, PAY ITEM

3.1 EXCAVATE REPOSITORY, SCREEN AND

STOCKPILE SOIL, 204

NOTES:

1) INSTALL CURTAIN DRAIN AND DRAIN PIPE

TRENCH PRIOR TO REPOSITORY

EXCAVATION.

2) EXCAVATIONS MUST MEET CURRENT

OSHA SAFETY STANDARDS. PROVIDE

TEMPORARY SHORING AS REQUIRED.

EQUIPMENT OUTSIDE OF EXCAVATION

SHALL MAINTAIN MIN. DISTANCE OF 20' FROM

CREST OF EXCAVATED SLOPE DURING

CONSTRUCTION.

3) FOR DRAIN PIPE WITHIN CURTAIN DRAIN

AND DRAIN PIPE TRENCH, PROVIDE 2%

MINIMUM SLOPE FROM POINT A TO POINT B

EACH SIDE OF REPOSITORY.

END CURTAIN DRAIN

BEGIN DRAIN PIPE TRENCH

(TYP. EA. SIDE)

CURTAIN DRAIN

BID ITEM 3.5

DRAIN PIPE TRENCH

BID ITEM 3.5

RUNON DITCH LOCATION

BID ITEM 3.9

SEDIMENT BASIN

EACH SIDE

BID ITEM 3.10

SLOPE DIRECTION

(MIN. 2%)

DRAIN PIPE TRENCH

END CURTAIN DRAIN

BEGIN DRAIN PIPE TRENCH

BID ITEM 3.5

CURTAIN DRAIN

6" PERFORATED PIPE

SET IN SOUTH END OF

REPOSITORY DRAIN GRAVEL

RUNOUT

BID ITEM 3.2

SLOPE DIRECTION (MIN. 2%)

SLOPE DIRECTION (MIN. 2%)

POINT B

POINT B

REVEGETATION ZONE 2 - TO CLEAR/GRUB LIMITS

REPOSITORY CAP REVEGETATION ZONE 2

6" NON-PERFORATED

EFFLUENT PIPE FROM

GRAVEL RUNOUT TO

SEDIMENT BASIN,

EACH SIDE

BID ITEM 3.2

SEE DETAILS

SEE DETAILS

SEE DETAILS

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Copyright: Tetra Tech

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

REPOSITORY

CONSTRUCTION REQUIREMENTS

N

SCALE:

25' 50'

1" = 50'

BID ITEM, PAY ITEM

3.2 DRAIN GRAVEL RUNOUT APRON, 204

3.5 EXCAVATE AND INSTALL CURTAIN DRAIN, 204

3.8 DITCH FOR SOIL EROSION AND POLLUTION

CONTROL, 157

3.9 SEDIMENT BASIN, 157

4.1 EXCAVATE TAILINGS, LOAD, HAUL, AND PLACE

IN REPOSITORY, 204

SCALE:

VERTICAL =1

HORIZONTAL=1

SECTION-B

50 FEET25025

25 0 25 50 FEET

SECTION-A

SCALE:

VERTICAL =1

HORIZONTAL=1

NOTES:

1) INSTALL CURTAIN DRAIN AND DRAIN

PIPE TRENCH PRIOR TO REPOSITORY

EXCAVATION.

2) EXCAVATIONS MUST MEET CURRENT

OSHA SAFETY STANDARDS. PROVIDE

TEMPORARY SHORING AS REQUIRED.

EQUIPMENT OUTSIDE OF EXCAVATION

SHALL MAINTAIN MIN. DISTANCE OF 20'

FROM CREST OF EXCAVATED SLOPE

DURING CONSTRUCTION.

3) FINISHED GROUND & TAILINGS

SURFACES SHOWN BASED ON

ANTICIPATED TAILINGS EXCAVATION

VOLUMES. ADJUST SURFACES AS

NECESSARY TO HOLD ACTUAL TAILINGS

VOLUMES. MAINTAIN MINIMUM 1%

SLOPE ON TEMPORARY CAP SURFACE.

EXISTING GROUND

BOTTOM SURFACE OF

REPOSITORY

FINISHED GRADE

GRAVEL RUNOUT

1:1 MAX. (TYP.)

RUNON DITCH LOCATION

CURTAIN DRAIN

LOCATION

GRAVEL

RUNOUT

TOP OF WASTE PHASE 1

EXISTING GROUND

RUNON DITCH

FINISHED GRADE

DRAIN PIPE TRENCH LOCATION

1:1 MAX. (TYP.)

GRAVEL RUNOUT

RUNON DITCH LOCATION

DRAIN PIPE TRENCH LOCATION

GRAVEL RUNOUT BOTTOM SURFACE OF REPOSITORY

REPOSITORY

CAP

PHASE 1

MIN. 1% SLOPE

TEMPORARY CAP THIS ZONE FOR PHASE 2 FILL

SEE DETAIL

PERMANANT

REPOSITORY

CAP

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Copyright: Tetra Tech

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

REPOSITORY CROSS SECTION

BID ITEM, PAY ITEM

3.1 EXCAVATE REPOSITORY, SCREEN AND STOCKPILE SOIL, 204

3.2 DRAIN GRAVEL RUN-OUT APRON, 204

4.1 EXCAVATE TAILINGS, LOAD, HAUL, AND PLACE IN REPOSITORY, 204

4.2 EXCAVATE TAILINGS IMPACTED TOPSOIL ADJACENT TO CREEK T4

AREA, LOAD, HAUL, AND PLACE IN REPOSITORY, 204

0.50 FEET TOP SOIL

3.5 FEET BACKFILL

COMPACTED TAILINGS 12" HORIZONTAL LOOSE LIFTS

COMPACTION = 90% OF

MAXIMUM DRY DENSITY

(STANDARD PROCTOR:

AASHTO T-99)

NATIVE SOIL

REPOSITORY CAP AND END DETAIL

NOT TO SCALE:

7.0'

3'

1.5'

RUNON DITCH LOCATION

BID ITEM 3.8

1:1 MAX. (TYP.), SEE

NOTE 2, SHEET 7

EXISTING GRADE

FINAL GRADE

DRAINAGE MATERIAL

AND FILTER FABRIC

BID ITEM 3.4

GEOSYNTHETIC

CLAY LINER (GCL)

BID ITEM 3.3

FINAL 12" LIFT

MUST CONSIST

OF FINE GRAIN

TAILINGS

SOIL COVER AND FILTER FABRIC

WITH DRAINAGE LAYER RUNOUT

(ALL SIDES)

EXTRA BENTONITE

THIS SURFACE

0.5' TOPSOIL

1' BACKFILL

COMPACTED TAILINGS

EXCAVATION SURFACE

GCL BID ITEM 3.3

TEMPORARY REPOSITORY CAP DETAIL

NOT TO SCALE:

DRAINAGE MATERIAL AND

FILTER FABRIC BID ITEM 3.4

EXTRA BENTONITE

THIS SURFACE

DRAIN GRAVEL RUNOUT

BID ITEM 3.2

7.0'

3'

1.5'

SOIL COVER AND FILTER FABRIC WITH

DRAINAGE LAYER RUNOUT

(ALL SIDES)

1.0'

6" Ø PERFORATED HDPE SOUTH

EDGE ONLY AS SHOWN ON SHEET 6

2.0'

DRAIN GRAVEL RUNOUT

BID ITEM 3.2

FILTER FABRIC

GCL

DRAINAGE MATERIAL

WASTE

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

REPOSITORY CAP END DETAIL

BID ITEM, PAY ITEM

3.1 EXCAVATE REPOSITORY, SCREEN AND STOCKPILE SOIL, 204

3.2 DRAIN GRAVEL RUNOUT APRON, 204

3.3 GEOSYNTHETIC CLAY LINER (GCL), 714

3.4 DRAINAGE MATERIAL WITH FILTER FABRIC, 714

3.6 PLACE AND GRADE BACKFILL, 204

3.7 PLACING TOPSOIL, 624

3.9 DITCH FOR SOIL EROSION AND POLLUTION CONTROL, 157

4.1 EXCAVATE TAILINGS, LOAD, HAUL, AND PLACE IN REPOSITORY, 204

4.2 EXCAVATE TAILINGS IMPACTED TOPSOIL ADJACENT TO CREEK IN T4

AREA, LOAD, HAUL, AND PLACE IN REPOSITORY, 204

SEE DETAIL 2

4'

4' (MIN.) 10' (MIN.)14' (MIN.)

2'

COMPACTED

TAILINGS

RUNON/RUNOFF DIVERSION DITCH

NOT TO SCALE

CURTAIN DRAIN or

DRAIN PIPE TRENCH

EROSION CONTROL MAT

REPOSITORY

CAP BOUNDARY

12" (TYP.)

6" (TYP.)

2'

REPOSITORY DIVERSION DITCH

EROSION CONTROL MAT DETAIL

NOT TO SCALE

EROSION CONTROL MAT SEE

DETAIL

6"

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EROSION CONTROL MAT SIDE

BY SIDE OVERLAP DETAIL

NOT TO SCALE

EROSION CONTROL MAT

6'

4'

2'

12'

12'

C DITCH

L

A

A

REPOSITORY RUNOFF DIVERSION DITCH

SEDIMENT BASIN

NOT TO SCALE

NON-PERFORATED

6" EFFLUENT PIPE

FROM DRAIN

GRAVEL RUNOUT

CLASS 2 RIPRAP (8" NOMINAL

DIAMETER, LAYER THICKNESS =

2 FEET EXCAVATE EXISTING

GROUND AND IMBED RIPRAP

APPROXIMATELY 2 FEET DEEP.)

APPROXIMATE

FALL LINE OF

SLOPE

APPROXIMATE DAYLIGHT

POINT OF DITCH

APPROXIMATE DAYLIGHT

POINT OF DRAIN

EFFLUENT PIPES

DRAIN PIPE TRENCH

NON-PERFORATED 6"

EFFLUENT PIPE

1.5'

NON-WOVEN GEOTEXTILE

TWO (2) - 6" NON-PERFORATED PIPE

AND 6" SCREENED OUTLETS, 1 EACH

FROM CURTAIN DRAIN AND SOUTH

DRAIN GRAVEL RUNOUT

0.5'

4'

1' (TYP.)

MATCH

EXISTING

GROUND

CLASS 2 RIPRAP (8" NOMINAL DIAMETER, LAYER

THICKNESS = 2 FEET EXCAVATE EXISTING GROUND

AND IMBED RIPRAP APPROXIMATELY 2 FEET DEEP.)

0.5' (TYP.)

REPOSITORY RUNOFF DIVERSION DITCH

SEDIMENT BASIN CROSS-SECTION

NOT TO SCALE

A

C DITCH

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

REPOSITORY EROSION

CONTROL DETAILS

NOTES:

1) SEED, MULCH, AND INSTALL EROSION CONTROL MAT IN ACCORDANCE WITH THE SPECIFICATIONS.

2) INSTALL EROSION CONTROL MAT ALONG STREAM CHANNEL BANKS AND IN DIVERSION DITCHES IN

ACCORDANCE WITH THE SPECIFICATIONS. ANCHOR MAT IN ACCORDANCE WITH DETAILS, ON THIS

SHEET. ROLL MAT PARALLEL TO WATER FLOW DIRECTION.

BID ITEM, PAY ITEM

3.5 EXCAVATE AND INSTALL CURTAIN DRAIN, 204

3.8 DITCH FOR SOIL EROSION AND POLLUTION

CONTROL, 204

3.9 SEDIMENT BASIN, 204

8' (MIN.)

1.5' (MIN.)

2' (MIN.)

1'

0.5'

DECOMPOSED GRANITE

BEDROCK (SP)

NATIVE SILTY SAND (SM)

W/ GRAVEL & COBBLES

1'

CURTAIN DRAIN DETAIL

NOT TO SCALE

SLIGHTLY MOUND FOR SETTLEMENT

6" PERFORATED PIPE

INSTALLATION STRAP FOR

GEOCOMPOSITE DRAIN SYSTEM

GEOCOMPOSITE DRAIN

SYSTEM

WOODEN STRAP STAKE

EXISTING GROUND

REPOSITORY

BACKFILL WITH NATIVE MATERIAL

(NO PARTICLE LARGER THAN 2")

BACKFILL WITH NATIVE MATERIAL

(NO PARTICLE LARGER THAN 6")

6" TO 12"

DECOMPOSED

GRANITE BEDROCK

CURTAIN DRAIN DRAIN PIPE TRENCH

CURTAIN DRAIN/DRAIN PIPE INTERFACE DETAIL

NOT TO SCALE

BACKFILL

NON-WOVEN GEOTEXTILE

NON-WOVEN

GEOTEXTILE

6" NON-PERFORATED EFFLUENT PIPE

NON-WOVEN GEOTEXTILE FILTER SOCK

COUPLING BAND

6" PERFORATED PIPE OF

GEOCOMPOSITE DRAIN SYSTEM

BACKFILL WITH NATIVE MATERIAL

(NO PARTICLE LARGER THAN 6")

2% MIN. SLOPE TO DAYLIGHT IN

SEDIMENT BASIN

BACKFILL WITH NATIVE MATERIAL

(NO PARTICLE LARGER THAN 2")

DRAIN ROCK

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

CURTAIN DRAIN DETAIL

BID ITEM, PAY ITEM

3.5 EXCAVATE AND INSTALL CURTAIN DRAIN, 204

T2-TP5

T2-TP4

T2-FP1

T2-TP1

T2-TP3

T2-TP2

T3-HP1

T3-TP2

T3-TP1

MF-28

MFT-27

MFT-27A

MFT-US-27

MF-26

MFT-25

T3-DH2

T3-HB2

T3-DH8

T3-DH7

T3-HB1

T3-DH5

T3-DH1

T3-DH4

T3-DH6

T3-HW4

T3-DH12

T3-DH9

T3-DH11

T3-HW2

T3-DH3

T3-DH10

T3-HW3

T3-HW1

LIMIT OF CLEARING AND GRUBBING

BID ITEM 2.2

APPROXIMATE LOCATIONS OF

DECANT TOWERS

BID ITEM 4.1

LIMIT OF CLEARING

AND GRUBBING

BID ITEM 2.2

T3 TAILINGS REMOVAL

AREA BOUNDARY

BID ITEM 4.1

TAILINGS DAM 3

LIMIT OF CLEARING AND GRUBBING

BID ITEM 2.2

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

T3 AREA EXISTING CONDITIONS AND

REMOVAL REQUIREMENTS

N

SCALE:

30' 60'

1" = 60'

LEGEND

T2-FP1

T3-TP2

T3-TP1

- TEST PIT LOCATION (SOIL SAMPLES COLLECTED)

- TEST PIT LOCATION (SOIL SAMPLES NOT COLLECTED)

- FLOOD PLAIN SOIL SAMPLE LOCATION

- WARM SPRINGS CREEK

- TAILINGS DAM AREA ROAD

CONTOUR INTERVAL = 2 FEET

- IMPACTED SOIL REMOVAL BOTH SIDES OF STREAM

VIEW DIRECTION OF SECTION

SHEET NUMBER ON

WHICH SECTION APPEARS

SECTION DESIGNATION

BID ITEM, PAY ITEM

2.2 CLEARING AND GRUBBING, 201

4.1 EXCAVATE TAILINGS, LOAD, HAUL, AND PLACE IN

REPOSITORY, 204

5.1 RECONSTRUCT STREAM CHANNEL IN T3 AREA, 204

T3-DH7

T3-HB2

- UNNAMED TRIBUTARY TO WARM SPRINGS CREEK

- SOIL BORING LOCATION (SOIL SAMPLES COLLECTED)

- SOIL BORING LOCATION (SOIL SAMPLES NOT COLLECTED)

NOTE: VERTICAL DATUM ESTIMATED FROM RESOURCE GRADE GPS TIE.

EXISTING STREAM CHANNEL

LOCATION TO BE BACKFILLED

BID ITEM 4.3

FINAL STREAM CHANNEL

LOCATION

EASTERN EXTENT T3

STREAM CONSTRUCTION

BID ITEM 5.1 SEE DETAIL

BOULDER DROP STRUCTURE

BID ITEM 5.2 SEE DETAIL

T3 TAILINGS REMOVAL AREA BOUNDARY

BID ITEM 5.5 SEE DETAIL

WESTERN EXTENT T3

STREAM CONSTRUCTION

BID ITEM 5.1 SEE DETAIL

SOUTHERN EXTENT OF UNNAMED TRIBUTARY

TO WARM SPRINGS CREEK CONSTRUCTION

BID ITEM 2.3 SEE DETAIL

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FR 4016

PROPOSED DIVERSION PIPE LOCATION

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

T3 AREA FINAL ELEVATIONS AFTER

TAILINGS REMOVAL AND RECONSTRUCTION

OF MIDDLE FORK OF WARM SPRINGS CREEK

N

SCALE:

30' 60'

1" = 60'

BID ITEM, PAY ITEM

2.3 RECONSTRUCT UNNAMED TRIBUTARY TO WARM

SPRINGS CREEK, 204

4.3 PLACE AND GRADE BACKFILL, 204

5.1 RECONSTRUCT STREAM CHANNEL IN T3 AREA, 200

5.2 CONSTRUCT BOULDER DROP STRUCTURES, 204

5.4 REGRADE TAILINGS REMOVAL AREA, 204

5.5 FURNISHING AND PLACING TOPSOIL, 624

CONTOUR INTERVAL = 2 FEET

LEGEND

- WARM SPRINGS CREEK

- TAILINGS DAM AREA ROAD

VIEW DIRECTION OF SECTION

SHEET NUMBER ON

WHICH SECTION APPEARS

SECTION DESIGNATION

- UNNAMED TRIBUTARY TO WARM SPRINGS CREEK

NOTE: VERTICAL DATUM ESTIMATED FROM RESOURCE GRADE GPS TIE.

- BOULDER DROP STRUCTURE

T3-TP1

T4-TP1

T4-TP2

T4-TP3

T4-TP4

T4-TP5

T3-DH11

T3-HW4

T3-DH12

T3-HW2

T3-HW1

T3-HW3

T3-HW4

T3-DH12

T3-DH11

T3-HW2

T3-HW3

T3-HW1

PROPOSED ACCESS ROAD

APPROXIMATE ADIT LOCATION

EASTERN LIMIT SOIL REMOVAL

BOTH SIDES OF CREEK

BID ITEM 4.2

T4 TAILINGS REMOVAL AREA

BID ITEM 4.1 SEE DETAIL

TAILINGS DAM 4

WESTERN LIMIT SOIL REMOVAL

BOTH SIDES OF CREEK

BID ITEM 4.2

LIMIT OF CLEARING

AND GRUBBING BID ITEM 2.2

A

LIMIT OF CLEARING AND GRUBBING

BID ITEM 2.2

A

PROJECT

CONTROL

POINT

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CREEK

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

T4 AREA EXISTING CONDITIONS

AND REMOVAL REQUIREMENTS

N

SCALE:

30' 60'

1" = 60'

BID ITEM, PAY ITEM

2.2 CLEARING AND GRUBBING, 201

4.1 EXCAVATE TAILINGS, LOAD, HAUL, AND PLACE IN

REPOSITORY, 204

4.2 EXCAVATE TAILINGS IMPACTED TOPSOIL ADJACENT TO

CREEK IN AREA, 204

LEGEND

T2-FP1

T3-TP2

T3-TP1

- TEST PIT LOCATION (SOIL SAMPLES COLLECTED)

- TEST PIT LOCATION (SOIL SAMPLES NOT COLLECTED)

- FLOOD PLAIN SOIL SAMPLE LOCATION

NOTE: VERTICAL DATUM ESTIMATED FROM RESOURCE GRADE GPS TIE.

- WARM SPRINGS CREEK

- TAILINGS DAM AREA ROAD

CONTOUR INTERVAL = 2 FEET

- IMPACTED SOIL REMOVAL BOTH SIDES OF STREAM

VIEW DIRECTION OF SECTION

SHEET NUMBER ON

WHICH SECTION APPEARS

SECTION DESIGNATION

PROPOSED ACCESS ROAD

REGRADE TAILINGS REMOVAL AREA

BID ITEM 5.4 SEE SECTION

APPROXIMATE ADIT LOCATION

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FR 4016

www.tetratech.com

Copyright: Tetra Tech

MARK DATE DESCRIPTION BY

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

T4 AREA FINAL ELEVATIONS AFTER TAILINGS

REMOVAL AND IN-PLACE RECLAMATION OF

MIDDLE FORK OF WARM SPRINGS CREEK

N

SCALE:

30' 60'

1" = 60'

BID ITEM, PAY ITEM

5.4 REGRADE TAILINGS REMOVAL AREA, 204

5.5 FURNISHING AND PLACING TOPSOIL, 624

LEGEND

NOTE: VERTICAL DATUM ESTIMATED FROM RESOURCE GRADE GPS TIE.

- WARM SPRINGS CREEK

- TAILINGS DAM AREA ROAD

CONTOUR INTERVAL = 2 FEET

T C

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EASTERN AND WESTERN EXTENTS OF STREAM

CONSTRUCTION

EASTERN EXTENT T3

STREAM CONSTRUCTION

WESTERN EXTENT T4

TAILINGS REMOVAL AREA

EASTERN EXTENT T4

TAILINGS REMOVAL AREA

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EASTERN EXTENT T1 /

WESTERN EXTENT T2

TAILINGS REMOVAL AREA

(NOT IN THIS CONTRACT)

WESTERN EXTENT T2

TAILINGS REMOVAL AREA

(NOT IN THIS CONTRACT)

EASTERN EXTENT T2 /

TAILINGS REMOVAL AREA

(NOT IN THIS CONTRACT)

T1 AREA DROP

STRUCTURES (NOT IN

THIS CONTRACT)

WESTERN EXTENT

OF STREAM SURVEY

WESTERN EXTENT T3

STREAM CONSTRUCTION

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRING CREEK

PHASE 1 RECLAMATION

WARM SPRINGS CREEK EXISTING AND

FINAL GROUND STREAM PROFILES

SCALE:

50' 100'

1" = 100'

LEAVE 1' OF NATIVE MATERIAL

ADJACENT TO BANK

EXISTING SURFACE

SURFACE AFTER TAILINGS /

SOIL REMOVAL

CLEAN TOPSOIL

BID ITEM 5.5

FINAL SURFACE

REGRADE

BID ITEM 5.4

EXISTING STREAM CHANNEL

FINAL SURFACE

3:1 SLOPE TO TAILINGS

REMOVAL SURFACE

6' TO 9' FLOOD PLAIN NORTH AND

SOUTH SIDES STREAM CHANNEL

EXISTING STREAM CHANNEL

1'

VARIABLE

THICKNESS (1'-10')

EXISTING GROUND

TAILINGS

REMOVE 8" OF EXISTING IMPACTED TOPSOIL

NORTH AND SOUTH SIDE OF STREAM CHANNEL

TO BE DESIGNATED AND STAKED BY CO.

BID ITEM 4.2

BLEND OFFSET

DURING REGRADING

BID ITEM 5.4

EXISTING SURFACE

SURFACE AFTER

TAILINGS / SOIL

REMOVAL

STOP REMOVAL AT 0.5'

TAILINGS THICKNESS

BLEND OFFSET

DURING REGRADING

BID ITEM 5.4

REMOVE 0.5' OF SOIL

UNDER TAILINGS

TAILINGS

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

BOTH SIDES FLOOD PLAIN SOIL REMOVAL

AND RECONSTRUCTION DETAILS

BID ITEM, PAY ITEM

4.2 EXCAVATE TAILINGS IMPACTED TOPSOIL ADJACENT

TO CREEK IN T4 AREA, 204

5.4 REGRADE TAILINGS REMOVAL AREA, 204

5.5 FURNISHING AND PLACING TOPSOIL, 624

TYPICAL FLOODPLAIN SOIL REMOVAL BOTH SIDES OF CHANNEL CROSS-SECTION A

A

NTS

TYPICAL FLOODPLAIN BOTH SIDES OF CHANNEL CROSS-SECTION B

B

NTS

CHANNEL SUBSTRATE

TYPE II STONE (TYP)

45°

8'

VARIES, 8" - 1.5' SEE PROFILE

SURFACE AND FOOTING

BOULDER (2' - 3' MIN Ø)

TYPE I STONE

45°

12" Ø COIR LOG (TYP)

CHANNEL SUBSTRATE

TYPE II STONE (TYP)

12" Ø COIR LOG (TYP)

CHANNEL SUBSTRATE

TYPE II STONE (TYP)

CHANNEL SUBSTRATE

TYPE II STONE (TYP)

TYPE I STONE

60° A

B

C

EXISTING GROUND

1'

3'

3'

5' (TYP.)

CHANNEL SUBSTRATE

TYPE II STONE (TYP)

6"(TYP.)

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

BOULDER DROP STRUCTURE DETAILS

TYPICAL DROP STRUCTURE AT THALWEG

A

NTS

TYPICAL DROP STRUCTURE AT BANKLINE

B

NTS

CROSS SECTION ALONG DROP STRUCTUREC

NTS

BID ITEM, PAY ITEM

5.2 CONSTRUCT BOULDER DROP STRUCTURES, 204

BOULDER DROP STRUCTURE PLAN VIEW1

TYPE II STONE

TAILINGS REMOVAL SURFACE

12" COCONUT

FIBER LOG

12" COCONUT

FIBER LOG

0.5' TOP SOIL

CONTINUE 3:1 SLOPE TO

TAILINGS REMOVAL SURFACE

NOTE:

2) CHANNEL WIDTH VARIES FROM 2.5' TO 3.0'.

BOTTOM OF CHANNEL WIDTH VARIES FROM 0.75' TO 1'

AS CHANNEL WIDTH VARIES.

TAILINGS REMOVAL SURFACE

2 (Typ.)

3 (Typ.)

3 (Typ.)

NATIVE MATERIAL

℄CHANNEL (AS

STAKED BY CO)

SEDIMENT SIZE

<2 INCHES

2-6 INCHES

6-10 INCHES

10-16 INCHES

8" COCONUT FIBER LOG

0.5' TOPSOIL - MATCH TO EXITING GROUND

8" COCONUT FIBER LOG

TYPE III STONE

℄CHANNEL (AS

STAKED BY CO)

NATIVE MATERIAL

TYPE II

30%

15%

15%

40%

TYPE III

60% (40% > 0.75 INCHES)

15%

15%

10% www.tetratech.com

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

TYPICAL STREAM CHANNEL CONSTRUCTION

CROSS SECTION DETAILS

BID ITEM, PAY ITEM

5.1 RECONSTRUCT STREAM CHANNEL IN T3 AREA, 204

5.3 PROVIDE AND INSTALL FIBER LOGS, 157

5.5 FURNISHING AND REPLACING TOPSOIL, 624

6.2 SITE REVEGETATION, 625

TYPICAL T3 AREA CHANNEL CONSTRUCTION CROSS-SECTION1

NTS

TYPICAL UNNAMED TRIBUTARY CONSTRUCTION CROSS-SECTION2

NOTE:

1) PROVIDE AND INSTALL COCONUT

FIBER LOG BIODEGRADABLE STRING PER

MANUFACTURER'S RECOMMENDATIONS.

2" x 2" x 2.5' WOODEN STAKE

(SPACING ON STREAM SIDE 2', FLOODPLAIN SIDE 8')

BIODEGRADABLE STRING

WILLOW SWITCH, 4' SPACING ALONG LOG

(NOT THIS CONTRACT)

COCONUT FIBER LOG

S

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A

N

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TOP SOIL

3:1

F

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3:1

6' MAX.

8" MIN.

FILTER FENCE MATERIAL

BACKFILLED TRENCH

6"x6"x14GA. WIRE FABRIC

OR EQUIVALENT

6"x6"x14GA. WIRE FABRIC

OR EQUIVALENT

TOP OF FABRIC

GROUND LEVEL

BURY BOTTOM OF

FILTER FENCE MATERIAL

IN 8"x12" TRENCH

STEEL FENCE POSTS

USE STAPLES OR WIRE RINGS @ 14"

O.C. TO ATTACH FABRIC TO WIRE

BUTT BALES TOGETHER AND

FILL WITH LOOSE STRAW AS

NEEDED FOR A TIGHT SEAL

DIRECTION

OF RUNOFF FROM

DISTURBED AREAS

SECURE EACH BALE

WITH AT LEAST 2 STAKES

PLAN

NOT TO SCALE

ELEVATION

NOT TO SCALE

DIRECTION

OF RUNOFF

S

L

O

P

E

SECURE EACH BALE WITH AT LEAST 2 2"x 2"

WOODEN STAKES OR #4 REBAR. DRIVE

EACH STAKE AT APPROXIMATELY 30° FROM

VERTICAL TOWARD ADJACENT BALE.

VARIES

EXISTING

GROUND

8"

PLACE AND

COMPACT

EXCAVATED SOIL

M

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

EROSION CONTROL DETAILS

BID ITEM, PAY ITEM

2.5 SILT FENCE, 157

3.10 STRAW BALES, 157

3.11 STRAW BALES, 157

5.1 RECONSTRUCT STREAM CHANNEL IN T3 AREA, 204

5.3 INSTALL COCONUT FIBER LOGS, 157

COCONUT FIBER LOG STAKING DETAIL

NTS

SILT FENCE DETAIL

NTS

STRAW BALE DETAIL

APPROXIMATE ADIT LOCATION

(NOT IN THIS CONTRACT)

PROJECT

CONTROL

POINT

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

FINAL SITE MAP

N

SCALE:

75' 150'

1" = 150'

REVEGETATION ZONE 2 - TO CLEAR/GRUB LIMITS

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303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

REPOSITORY

REVEGETATION REQUIREMENTS

N

SCALE:

25' 50'

1" = 50'

BID ITEM, PAY ITEM

6.2 SITE REVEGETATION, 625

T3 TAILINGS REMOVAL AREA BOUNDARY

NO

PLANTING

REQUIRED

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Copyright: Tetra Tech

MARK DATE DESCRIPTION BY

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A R

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S

P R

I N

E

M

E

N G

I N

E E

R I N

G

S

E R

V I C

E S

C

A D

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E T

F I L E

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H A

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I E

L D

S

T E

V E

A

2 3 4 5 6

B

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D

E

303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

T3 AREA

REVEGETATION REQUIREMENTS

N

SCALE:

30' 60'

1" = 60'

BID ITEM, PAY ITEM

6.2 SITE REVEGETATION, 625

ZONE 1 TYPE VEGETATION

ZONE 2 TYPE VEGETATION

LEGEND

T4 TAILINGS REMOVAL AREA

APPROXIMATE ADIT LOCATION

NO

PLANTING

REQUIRED

PROJECT

CONTROL

POINT

M

I

D

D

L

E

F

O

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K

W

A

R

M S

P

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I N

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CREEK

www.tetratech.com

Copyright: Tetra Tech

MARK DATE DESCRIPTION BY

A

M

O

H

M

M

V

I R

O N

M E

N T

A L

W

A R

M

S

P R

I N

E

M

E

N G

I N

E E

R I N

G

S

E R

V I C

E S

C

A D

S

H E

E T

F I L E

S P

H A

T

R

E V

Q

D

I E

L D

S

T E

V E

A

2 3 4 5 6

B

C

D

E

303 Irene Street

Helena, MT 59601-8601

PHONE: 406-443-5210 FAX: 406-449-3729

WARM SPRINGS CREEK

PHASE 1 RECLAMATION

T4 AREA

REVEGETATION REQUIREMENTS

N

SCALE:

30' 60'

1" = 60'

BID ITEM, PAY ITEM

6.2 SITE REVEGETATION, 625

ZONE 1 TYPE VEGETATION

ZONE 2 TYPE VEGETATION

LEGEND