7. Drawings and Specifications.pdf

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USFS - M4 Road Slide Repair
Solicitation number
127EAW26Q0007
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This document is a set of construction plans and specifications for the M4 Road Repair S16 project located on the Mendocino National Forest in Tehama County, California, managed by the Grindstone Ranger District of the U.S. Department of Agriculture Forest Service.

The project involves repairing a failed section of Forest Service Road M4 caused by culvert failure. The work includes excavation of unstable fill material to approximately 10 feet below the existing road surface, installation of a new 24-inch diameter corrugated metal pipe (CMP) culvert at a 10% grade with a drop inlet structure, construction of a geogrid-reinforced embankment using Type III geogrid in multiple tiers, placement of Class 2 and Class 3 riprap for slope and outlet protection, installation of surface aggregate, erosion control measures, seeding, and temporary traffic control. The schedule of items includes mobilization, survey and staking, soil erosion and pollution control, roadway excavation and embankment (1,400 cubic yards), geotextile placement (1,560 square yards), riprap placement (2 tons Class 2 and 14 tons Class 3), surface aggregate (30 tons), a 24-inch CMP with fittings (40 linear feet), drop inlet installation (1 each), seeding (215 square yards), and temporary traffic control. The existing 18-inch CMP must be completely removed, and unsuitable material must be disposed of off government lands in accordance with local and state regulations. The contractor is responsible for minimizing equipment travel on existing pavement, obtaining permits for oversize/overload travel, and establishing approved pollution control and traffic control plans.

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RECOMMENDED BY:

APPROVED:

FOREST ENGINEER

DISTRICT RANGER DATE

DATE

DATEFOREST SUPERVISOR

INDEX OF SHEETS

SHT SHEET TITLE DATE

TITLE

G-1 LOCATION MAP 8/08/24

G-2 SCHEDULE OF ITEMS & NOTES 4/13/26

D-1 PLANS 4/13/26

D-2 SECTIONS 4/13/26

D-3 DETAILS 8/14/24

D-4 TYPICALS 8/14/24

M4 ROAD REPAIR S16

CALIFORNIA

TEHAMA COUNTY

R05 PACIFIC SOUTHWEST

MENDOCINONATIONAL FOREST

GRINDSTONE RANGER DISTRCT

United States Department of Agriculture Forest Service

TRAVEL DIRECTIONS:

FROM CORNING, TRAVEL WEST

ON TC A9 (CORNING ROAD) FOR

19.5 MILES TO PASKENTA.

CONTINUE SOUTH ON TC 55

(ROUND VALLEY ROAD) PAST THE

SALT CREEK CONSERVATION

CAMP FOR 13.6 MILES TO THE

INTERSECTION WITH FOREST

SERVICE M4. TC 55 CONTINUES

TO THE LEFT. (39.8258, -122.6792).

TC 55 CAN ALSO BE REACHED

FROM THE SOUTH VIA SR 162

(WEST FROM WILLOWS) AND

GLENN COUNTY ROAD 306 TO

TAHAMA COUNTY ROAD 58

THROUGH NEWVILLE.

PROJECT LOCATION

MENDOCINO

NATIONAL

FOREST

DRAWING TITLE

DRAWN

DESIGNER

CHECKED

ARCHIVE NO.

DATE

PROJECT NO.

DWG SHEET NO.

OFSHEET

United States Department of Agriculture Forest Service

4/1 5/2

6 1 0:

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(R05)

PACIFIC SOUTHWEST

M4 ROAD REPAIR S16

MENDOCINO

NATIONAL FOREST

GRINGSTONE

RANGER DISTRICT

LOCATION

AND NOTES

8/27/24

G BUTLER

G BUTLER

F. RICO

G-1

2 MILES

TO ELK CREEK

AND WILLOWS

PROJECT LOCATION NOTES:

1. THIS MAP SHOWS COUNTY ROADS AND PRIMARY FS ROADS IN THE AREA. SOME OTHER FS ROADS ADJACENT TO THE WORK ARE SHOWN TO AID IN NAVIGATION. MOST FS AND ANY PRIVATE ROADS IN THIS AREA ARE NOT

SHOWN. FOR A COMPLETE MAP, CONTACT THE GRINDSTONE RANGER DISTRICT OFFICE.

2. THE PRIMARY DETOUR ROUTE FOR ACCESS AROUND THE WORK SITE IS SHOWN. SPECIFIC DETAILS OF ANY

TRAFFIC CONTROL AND ROAD CLOSURE SIGNING REQUIREMENTS ARE IN CONTRACT SECTION H.

ENCROACHMENT PERMITS FOR TRAFFIC CONTROL ARE THE RESPONSIBILITY OF THE CONTRACTOR.

3. NON-POTABLE WATER FOR CONSTRUCTION MAY BE OBTAINED AT PASKENTA WORK CENTER. ADDITIONAL

WATER SOURCES MAY BE IDENTIFIED AND APPROVED BY THE CONTRACTING OFFICER.

4. CONTRACTOR SHALL MINIMIZE TRAVEL OF STEEL TRACKED MACHINES ON THE EXISTING AC AND CHIP SEAL PAVEMENT. ANY DAMAGE TO THE ROAD(S) AS A RESULT OF THEIR ACTIVITIES SHALL BE REPAIRED BY THE

CONTRACTOR AT NO ADDITIONAL COST TO THE GOVERNMENT.

5. PERMITS FOR OVERSIZE/OVERLOAD TRAVEL ON ANY ROADS SHALL BE OBTAINED BY THE CONTRACTOR

PRIOR TO USE.

PROJECT MAP Paskenta A9

23N3523N109

23N100

N6

23N46

23N04

23N21

23N63

TC 55 DETOUR ROUTE SALT CREEK CCC STATION

WORK SITE

LOG SPRING FS

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DESIGNER

CHECKED

ARCHIVE NO.

DATE

PROJECT NO.

DWG SHEET NO.

OFSHEET

United States Department of Agriculture Forest Service

4/1 5/2

6 1 0:

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(R05)

PACIFIC SOUTHWEST

M4 ROAD REPAIR S16

MENDOCINO

NATIONAL FOREST

GRINGSTONE

RANGER DISTRICT

SCHEDULE AND

NOTES

4/13/26

G BUTLER

G BUTLER

F. RICO

G-2

NOTES TO THE SCHEDULE OF ITEMS

15101 MOBILIZATION: INCLUDES ALL COSTS TO DEPLOY PERSONNEL AND

EQUIPMENT TO THE PROJECT SITE. ALL COSTS TO DEMOBILIZE

PERSONNEL AND EQUIPMENT INCLUDING UNUSED MATERIALS AND

SUPPLIES NOT PURCHASED BY THE GOVERNMENT.

15201 SURVEY AND STAKING: INCLUDES ALL COSTS FOR PERSONNEL,

SUPPLIES, AND EQUIPMENT TO ESTABLISH AND MAINTAIN THE

CONSTRUCTION CONTROLS.

15701 WORK FOR THIS ITEM WILL INCLUDE ALL EQUIPMENT, MATERIALS,

AND LABOR NECESSARY TO PERFORM THE REQUIREMENTS OF THE

APPROVED POLLUTION AND EROSION CONTROL PLAN. THIS ITEM

COVERS ALL PHASES OF THE CONTRACT.

20401 ROADWAY EXCAVATION: INCLUDES ALL COSTS FOR PERSONNEL,

MATERIALS, AND EQUIPMENT NECESSARY FOR THE EXCAVATION,

EMBANKMENT, AND COMPACTION OF THE ROAD REPAIR AS SHOWN IN

THE DRAWINGS

20701 GEOTEXTILE: INCLUDES ALL COSTS TO FURNISH AND PLACE THE

REQUIRED GEOGRID REINFORCEMENT IN ACCORDANCE WITH THE

MANUFACTURER'S RECOMMENDATIONS, THE SPECIFICATIONS, AND

AS SHOWN IN THE DRAWINGS.:

25102 RIPRAP (A&B): INCLUDES ALL COSTS TO FURNISH AND PLACE THE

RIPRAP ROCK IN ACCORDANCE WITH THE SPECIFICATIONS AND AS

SHOWN IN THE DRAWINGS. RIPRAP PLACEMENT INCLUDES THE

REQUIRED FILTER/SEPARATION GEOFABRIC AS SHOWN IN THE

DRAWINGS.

30102 SURFACE AGGREGATE: INCLUDES ALL COSTS TO FURNISH AND PLACE

THE SURFACE AGGREGATE IN ACCORDANCE WITH THE

SPECIFICATIONS AND AS SHOWN IN THE DRAWINGS.

60201 DRAINAGE CULVERT, CMP: INCLUDES ALL COSTS TO FURNISH AND

INSTALL THE 24" DRAIN CMP AND NECESSARY FITTINGS IN

ACCORDANCE WITH THE SPECIFICATIONS AND AS SHOWN IN THE

DRAWINGS.

60402 DROP INLET: INCLUDES ALL COSTS TO FURNISH AND INSTALL THE

DROP INLET IN ACCORDANCE WITH THE SPECIFICATIONS AND AS

SHOWN IN THE DRAWINGS.

62901 SEEDING: INCLUDES ALL COSTS TO FURNISH AND PLACE THE

SEED/ROLLS IN ACCORDANCE WITH THE SPECIFICATIONS AND AS

SHOWN IN THE DRAWINGS.

63501 THIS ITEM INCLUDES ALL EQUIPMENT, MATERIALS, AND LABOR TO

ESTABLISH AND MAINTAIN THE APPROVED TRAFFIC CONTROL PLAN

FOR THE DURATION OF PROJECT SITE WORK.

SCHEDULE OF ITEMS

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E

DESIGNER

CHECKED

ARCHIVE NO.

DATE

PROJECT NO.

DWG SHEET NO.

OFSHEET

United States Department of Agriculture Forest Service

4/1 5/2

6 1 0:

G

EO

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E.

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(R05)

PACIFIC SOUTHWEST

M4 ROAD REPAIR S16

MENDOCINO

NATIONAL FOREST

GRINGSTONE

RANGER DISTRICT

PLAN

4/13/26

G BUTLER

G BUTLER

F. RICO

D-1

BASE MAT, 20' X 50'

DROP INLET DETAIL

DRAIN FLOW IN DITCH

NOTES:

1. EXCAVATION FOR THE BASE MAT IS TO ELEVATION 4560

(APPROXIMATELY 10' BELOW THE FINISH GRADE OF THE

RECONSTRUCTED ROAD SURFACE.

2. THE ENTIRE EXISTING CMP CULVERT IS TO BE REMOVED IN

ACCORDANCE WITH SECTION 203

3. THE OUTLET DISSIPATER RIPRAP WILL COVER AN AREA 10' WIDE

(CENTERED ON THE PIPE) AND EXTEND 1' ABOVE AND 12' BELOW THE

OUTLET. ROCK MUST CONFORM TO 705, CLASS 3

4. THE WIDTH OF THE BASE (T-1) GEOTEXTILE WILL VARY SLIGHTLY

DEPENDING ON THE POINT IF INTERSECTION OF THE EXCAVATION FLOOR

WITH THE NATURAL SLOPE

73°±

EXISTING CMP TO BE REMOVED

RIPRAP OUTLET APRON SEE

NOTE 3

GEOGRID STRUCTURE

SEE SHT. D-2

INSIDE EDGE OF ROAD

A

A B

B

110'

39'

A

27'

SEE NOTE 4

63'

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DESIGNER

CHECKED

ARCHIVE NO.

DATE

PROJECT NO.

DWG SHEET NO.

OFSHEET

United States Department of Agriculture Forest Service

4/1 5/2

6 1 0:

G

EO

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W G;

(R05)

PACIFIC SOUTHWEST

M4 ROAD REPAIR S16

MENDOCINO

NATIONAL FOREST

GRINGSTONE

RANGER DISTRICT

DETAILS 1

4/13/26

G BUTLER

G BUTLER

F. RICO

D-2

EXISTING 18" CMP

24" DEEP BASE GEOGRID MAT

20' X 50'. SEE NOTE 3

SECTION B-B, CONSTRUCTED

SECTION A-A, POST FAILURE

41'

OUTLET APRON CLASS 3 RIPRAP

ON GEOTEXTILE FABRIC

NOTES:

1. THE "APPROXIMATE FAILURE PLANE" IS

PROJECTED FROM SURFACE

INDICATORS WHICH SUGGEST A FILL

FAILURE PRECIPITATED BY THE

CULVERT FAILURE. THE PLANNED

EXCAVATION IS 10' BELOW THE

EXISTING ROAD SURFACE.

2. THE EXISTING 18' CMP IS TO BE

REMOVED ENTIRELY. THAT PORTION OF

THE EXCAVATION NOT IN THE AREA OF

THE CONSTRUCTED REINFORCED FILL

SLOPE OR NEW CMP INSTALATION

MUST BE BACKFILLED IN ACCORDANCE

WITH SECTION 203. ALL UNSUITABLE

MATERIAL MUST BE DISPOSED OF OFF

GOVERNMENT LANDS IN ACCORDANCE

WITH LOCAL AND STATE REGULATIONS.

3. THE BASE TIER (BASE MAT) AND TIERS

1-3 MUST UTILIZE TYPE III GEOGRID.

FOR THE BASE MAT, THE FABRIC MUST

BE TURNED UP AND OVER THE 24" LIFT

AND BE LAID BACK NO LESS THAN 36".

THE TIER 1 (T1) GRID IS LAID DIRECTLY

ON THE OVERTURNED FABRIC AND

EXTENDS TO THE RECONSTRUCTED

SLOPE.

4. THE OUTLET APRON RIPRAP MUST BE

PLACED ON GEOTEXTILE CONFORMING

TO CLASS 1, TYPE C. THE SHEET MUST

EXTENDS AT LEAST 12" BEYOND THE

PLACED ROCK.

5. THE 24" CMP IS TO BE INSTALLED AT A

CONTINUOUS GRADE OF 10% (4' DROP

OVER THE 40' RUN). THE OUTLET

FITTING IN THE DROP-INLET MUST BE

FABRICATED TO ACCOMMODATE A

PROPER CONNECTION AT THAT ANGLE.

6. INFORMATION ON THE DROP-INLET

COVER IS NOTED ON SHEET D-2

7. THE POST-FAILURE PROFILE AS SHOWN

HAS BEEN MODIFIED BY RECENT

TEMPORARY REPAIRS. THE

ESSENTIALCONDITIONS REMAIN AS

SHOWN.

RECONSTRUCTED SURFACE PROFILE

APPROXIMATE FAILURE PLANE

POST-FAILURE GROUND PROFILE PRE-FAILURE GROUND PROFILE

INSTALLED DROP-INLET AND CULVERT

SEE DETAIL SHT D-3

SLOPE ARMOR, CLASS 3 RIPRAP

GEOGRID STABILIZED STRUCTURE

BOTTOM TIER (T1): 40' X 110'

T2

T3

1.70

ROAD

20'

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DESIGNER

CHECKED

ARCHIVE NO.

DATE

PROJECT NO.

DWG SHEET NO.

OFSHEET

United States Department of Agriculture Forest Service

4/1 5/2

6 1 0:

G

EO

RG

E.

BU

TL

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D :\M

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4-

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W G;

(R05)

PACIFIC SOUTHWEST

M4 ROAD REPAIR S16

MENDOCINO

NATIONAL FOREST

GRINGSTONE

RANGER DISTRICT

DETAILS

8/22/24

G BUTLER

G BUTLER

F. RICO

D-3

CLASS 2 RIPRAP

BASIN REINFORCEMENT

CLASS 3 RIPRAP

SLOPE REINFORCEMENT

30" x 12 Ga RISER

24" X 14 Ga CMP

48"

OPEN GRATE COVER

SEE NOTE 5

CULVERT BEDDING6" ABOVE RISER BOTTOM

NATIVE SURFACE SLOPE

ROAD SURFACE

COUPLING BAND

NOTES:

1. THE DROP INLET IS SET ON THE SAME BEDDING MATERIAL AS THE

CULVERT. BEDDING MATERIAL MUST CONFORM WITH AASHTO M6,

BEDDING MATERIAL MUST COME UP TO TO THE MID-POINT OF THE

PIPES VERTICAL DIAMETER. NO ROCK LARGER THAN 1-1/2" WILL

COME IN CONTACT WITH THE CULVERT OR THE INLET IN THE

BACKFILL.

2. THE CULVERT IS TO BE GALVANIZED CORRUGATED METAL (STEEL)

PIPE WITH MINIMUM WALL THICKNESS OF 14 Ga. THE DROP INLET

IS TO BE GALVANIZED CORRUGATED METAL (STEEL) PIPE WITH

MINIMUM WALL THICKNESS OF 12 Ga. COUPLING BANDS ARE TO BE

AS RECOMMENDED OR SUPPLIED BY THE PIPE MANUFACTURER.

3. ALL SHOP OR FIELD FABRICATIONS INVOLVING CUTTING OR

WELDING OF THE STRUCTURE MUST BE COATED WITH TWO

COATS OF A ZINC-RICH PAINT INTENDED FOR THAT PURPOSE.

4. THE RISER OUTLET STUB MUST BE FABRICATED WITH THE 10%

DROP ANGLE OF THE CULVERT.

5. THE COVER GRATE SHOWN BELOW IS ONE POSSIBLE

CONFIGURATION. OTHERS ARE PERMITTED PROVIDED THEY MEET

THE FOLLOWING:

a. DEBRIS SMALLER THAN 2" IS ALLOWED TO PASS INTO THE

CULVERT.

b. ALL DEBRIS LARGER THAN 31

2" IS RETAINED ON THE GRATE.

c. THE DESIGN AND MATERIALS MUST WITHSTAND A 10#

ROCK DROPPING 10' WITH OUT SIGNIFICANT

DEFORMATION.

d. FABRICATED FROM STEEL THAT IS HOT-DIPPED

GALVANIZED

e. IS SECURELY ATTACHED TO THE INLET AND REMOVABLE

FOR MAINTENANCE.

2"

INITIAL (SELECT) BACKFILL

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DESIGNER

CHECKED

ARCHIVE NO.

DATE

PROJECT NO.

DWG SHEET NO.

OFSHEET

United States Department of Agriculture Forest Service

4/1 5/2

6 1 0:

G

EO

RG

E.

BU

TL

ER

D :\M

NF

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4_

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FA

IL

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4-

-2 6.D

W G;

(R05)

PACIFIC SOUTHWEST

M4 ROAD REPAIR S16

MENDOCINO

NATIONAL FOREST

GRINGSTONE

RANGER DISTRICT

ROAD TYPICALS

8/22/24

G BUTLER

G BUTLER

F. RICO

D-4

NOTES:

1. THIS DRAWING IS FOR GENERAL

REFERENCE ONLY. IT IS INTENDED TO

GUIDE THE CONTRACTOR IN SHAPPING

AND TRANSITIONING THE INSIDE DITCH

TO THE NEW DROP INLET.

2. DIMENSIONS AS SHOWN ON SHEETS

D-1, D-2, AND D-3 ARE TO BE FOLLOWED

IN CONSTRUCTING THE DRAINAGE

STRUCTURES.

CULVERT INLET - A

SIDE CATCH BASIN

CULVERT INLET - B

DROP INLET

RIPRAP ARMOR NOT SHOWN

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Sheets and Views
M4_FillFail_Rv_4-15-26-Title
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M4_FillFail_Rv_4-15-26-D-2_RoadSects
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