140L0626B0004_DRAFT_Drawings_1.pdf

PDF 13 MB Posted Mar 4, 2026

Attached to: GAOA BAR ISLAND DAM RECONSTRUCTION
Solicitation number: 140L0626B0004
Issued by: Department of the Interior Bureau of Land Management National Office

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Written by GovTribe AI · Mar 4, 2026

This document is a comprehensive design plan for the Bar Island Dam Modifications project located in Phillips County, Montana, prepared by DOWL for the United States Department of the Interior Bureau of Land Management (Malta Field Office). The project involves reconstruction and modification of an existing dam to improve spillway capacity, outlet works functionality, and overall structural integrity.

The design plan includes detailed engineering specifications covering dam embankment reconstruction with compacted fill, new outlet works consisting of a 36-inch reinforced concrete pipe conduit with concrete riser tower, and spillway improvements with erosion protection measures. Key modifications encompass removal of the existing 42-inch steel outlet works riser, installation of a new 10-foot wide gravel access road, toe drain system improvements with filter sand and gravel blankets, site plan and survey control, rating curves for spillway and outlet works performance, and construction details for concrete encasement, sand filtration, and geotextile stabilization fabric. The dam crest elevation is specified at 2,920.1 feet, with spillway crest at 2,914.1 feet. The document provides 26 sheets of drawings including cross-sections at various stations, detailed construction specifications, and site-specific plans with coordinate tables referenced to Montana State Plane coordinates. General structural notes specify compliance with American Concrete Institute standards, dead load design criteria, and concrete construction requirements. The project requires coordination with existing site conditions and includes provisions for excavation limits, material specifications, and quality assurance protocols typical of federal water resource infrastructure projects.

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File	Type	Posted
140L0626B0004_SourcesSought_1.pdf	PDF	Mar 4, 2026
140L0626B0004_DRAFT_Specifications_GeoReport_1.pdf	PDF	Mar 4, 2026

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BAR ISLAND DAM MODIFICATIONS

406-442-0370

1300 Cedar Street Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

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NID MT03923

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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%%UDRAWING INDEX

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DRAWING

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DESCRIPTION

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CAD DRAWING

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SHEET

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COVER SHEET AND SHEET INDEX

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SITE PLAN AND SURVEY CONTROL

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LOCATION AND VICINITY MAPS

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SC-GN-CV-12652-01.DWG

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PHILLIPS COUNTY, MONTANA

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MALTA FIELD OFFICE

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%%USTATE REFERENCE MAP

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COVER SHEET AND SHEET INDEX

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OW1

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OUTLET WORKS DEMOLITION AND EXCAVATION PLAN

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DAM EMBANKMENT EXCAVATION PLAN AND PROFILE

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DAM EMBANKMENT PLAN AND PROFILE

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OUTLET WORKS PLAN AND PROFILE

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OUTLET WORKS TYPICAL SECTIONS AND DETAILS

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EX1

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DAM EMBANKMENT SECTIONS STA. 3+50 TO STA. 4+25

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SPILLWAY IMPROVEMENTS PLAN AND PROFILE

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SW2

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SPILLWAY IMPROVEMENTS PLAN, PROFILE, & DETAILS

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SPILLWAY CROSS SECTIONS STA. 0+00 TO STA. 3+25

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SPILLWAY CROSS SECTIONS STA. 3+50 TO STA. 6+75

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OUTLET WORKS TOWER DETAILS

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STILLING BASIN PLAN AND PROFILE

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OUTLET WORKS SECTIONS STA. 0+75 TO STA. 1+50

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GENERAL STRUCTURAL NOTES & DETAILS

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AutoCAD SHX Text Dennis A. Russell, P.E.

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DOWL

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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MONTANA

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BAR ISLAND DAM MODIFICATIONS

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ALT

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MONTANA

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BENTON

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MISSOULA

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IDAHO

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BRITISH COLUMBIA

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KALISPELL

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CHINOOK

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LEWISTOWN

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BUTTE

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BILLINGS

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HELENA

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CHOTEAU

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ALBERTA

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UNITED STATES

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CANADA

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HAVRE

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WYOMING

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SOUTH DAKOTA

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GLASGOW

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MILES CITY

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MALTA

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NORTH DAKOTA

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PROJECT LOCATION

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DAM EMBANKMENT SECTIONS STA. 4+50 TO STA. 5+00

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DAM EMBANKMENT SECTIONS STA. 5+25 TO STA. 5+75

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DAM EMBANKMENT SECTIONS STA. 6+00 TO STA. 6+50

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TOE DRAIN DETAILS

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RATING CURVES

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PROJECT

LOCATION

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GREAT FALLS

BOZEMAN

MONTANA

DILLON

BUTTE

KALISPELL

MISSOULA

HELENA

SHELBY

HARDINBILLINGS

GLASGOW

LEWISTOWN

HAVRE

MILES CITY

SIDNEY

GLENDIVE

WINNETT

JORDAN

MALTA

BAR ISLAND DAM

Driving Directions:

TRAVEL SOUTH FROM MALTA ON US HIGHWAY 191 S FOR APPROXIMATELY 53 MILES. TURN LEFT ONTO ROBINSON ROAD AND TRAVEL 2.7 MILES. TURN RIGHT ON BAR ISLAND ROAD AND TRAVEL 2.5 MILES. TURN

RIGHT ON TWO TRACK AND TRAVEL 0.3 MILES TO BAR ISLAND RESERVOIR.

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LAND OWNERSHIP

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DAM

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KELSEY ROAD

U.S. HWY 191

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BAR ISLAND ROAD

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MONTANA

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BAR ISLAND DAM MODIFICATIONS

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SA-CS-LV-12652-01.DWG

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LOCATION AND VICINITY MAPS

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GENERAL STRUCTURAL NOTES

1300 Cedar Street Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

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1. APPLICABLE SPECIFICATIONS AND CODES APPLICABLE SPECIFICATIONS AND CODES a. CONSTRUCTION AND DESIGN SHALL BE IN ACCORDANCE WITH THE AMERICAN CONCRETE INSTITUTE CONSTRUCTION AND DESIGN SHALL BE IN ACCORDANCE WITH THE AMERICAN CONCRETE INSTITUTE SPECIFICATIONS AND THE REQUIREMENTS NOTED AS FOLLOWS 2. SPECIAL INSPECTION SPECIAL INSPECTION a. CONCRETE -- TABLE 1705.3 OF THE IBC CONCRETE -- TABLE 1705.3 OF THE IBC i. PERIODIC INSPECTION OF REINFORCEMENT BEFORE CONCRETE IS PLACED PERIODIC INSPECTION OF REINFORCEMENT BEFORE CONCRETE IS PLACED ii. FULL-TIME INSPECTION OF CAST IN AND POST-INSTALLED ANCHOR RODS AS IDENTIFIED HEREIN FULL-TIME INSPECTION OF CAST IN AND POST-INSTALLED ANCHOR RODS AS IDENTIFIED HEREIN iii. FULL-TIME INSPECTION DURING PLACEMENT OF CONCRETE, INCLUDING THE TAKING OF TEST SPECIMENS, FULL-TIME INSPECTION DURING PLACEMENT OF CONCRETE, INCLUDING THE TAKING OF TEST SPECIMENS, SLUMP, AND AIR, BE LIMITED TO STRUCTURAL REINFORCED CONCRETE WITH TESTING FREQUENCY IN ACCORDANCE WITH THE PROJECT TECHNICAL SPECIFICATIONS b. STEEL -- AISC 360 FOR STRUCTURAL STEEL, IBC TABLE 1705.2.3 FOR STEEL CONSTRUCTION OTHER THAN STEEL -- AISC 360 FOR STRUCTURAL STEEL, IBC TABLE 1705.2.3 FOR STEEL CONSTRUCTION OTHER THAN STRUCTURAL STEEL (COLD-FORMED STEEL, REBAR, ETC.) 3. DESIGN LOADS DESIGN LOADS a. DESIGN LOADS AND LOAD APPLICATIONS SHALL BE IN ACCORDANCE WITH IBC DESIGN LOADS AND LOAD APPLICATIONS SHALL BE IN ACCORDANCE WITH IBC b. UNIFORM DEAD AND LIVE LOADS UNIFORM DEAD AND LIVE LOADS i. DEAD LOADS, UNLESS OTHERWISE NOTED, SELF-WEIGHT OF STRUCTURE AND APPURTENANCES DEAD LOADS, UNLESS OTHERWISE NOTED, SELF-WEIGHT OF STRUCTURE AND APPURTENANCES 4. CONSTRUCTION LOADS CONSTRUCTION LOADS a. STRUCTURES HAVE BEEN DESIGNED FOR DEAD LOADS, AND THE DESIGN LOADS NOTED ABOVE. PROVIDE STRUCTURES HAVE BEEN DESIGNED FOR DEAD LOADS, AND THE DESIGN LOADS NOTED ABOVE. PROVIDE TEMPORARY BRACING, SHORING, OR OTHER SUPPLEMENTAL SUPPORT DURING CONSTRUCTION AS NECESSARY TO PROTECT THE STRUCTURES FROM EXCESSIVE CONSTRUCTION LOADS 5. FOUNDATIONS FOUNDATIONS a. BACKFILL ON WALLS WITH FILL ON BOTH SIDES SHALL BE COMPACTED IN EQUAL LIFTS EACH SIDE OF WALL. BACKFILL ON WALLS WITH FILL ON BOTH SIDES SHALL BE COMPACTED IN EQUAL LIFTS EACH SIDE OF WALL. WALLS BACKFILLED FROM ONE SIDE ONLY SHALL HAVE ALL SUPPORTING SLABS, PERMANENT FRAMING, OR TEMPORARY BRACING IN PLACE BEFORE PLACEMENT OF BACKFILL.

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6. CONCRETE CONCRETE a. CONCRETE CONSTRUCTION SHALL CONFORM TO THE AMERICAN CONCRETE INSTITUTE BUILDING CODE CONCRETE CONSTRUCTION SHALL CONFORM TO THE AMERICAN CONCRETE INSTITUTE BUILDING CODE REQUIREMENTS FOR REINFORCED CONCRETE (ACI 318) b. DETAILING, FABRICATION AND PLACEMENT OF REINFORCEMENT SHALL CONFORM TO DETAILS AND DETAILING DETAILING, FABRICATION AND PLACEMENT OF REINFORCEMENT SHALL CONFORM TO DETAILS AND DETAILING OF CONCRETE REINFORCEMENT (ACI 315) c. MATERIALS MATERIALS i. STRUCTURAL CAST-IN-PLACE CONCRETE -- f'c=4,000 PSI STRUCTURAL CAST-IN-PLACE CONCRETE -- f'c=4,000 PSI ii. REINFORCING BARS ----------------ASTM A615 GRADE 60 REINFORCING BARS ----------------ASTM A615 GRADE 60 d. ALL BENT REINFORCING BARS SHALL BE SHOP FABRICATED ONLY. REBENDING OR WELDING OF ALL BENT REINFORCING BARS SHALL BE SHOP FABRICATED ONLY. REBENDING OR WELDING OF REINFORCEMENT SHALL NOT BE PERMITTED UNLESS AUTHORIZED BY ENGINEER. e. END HOOKS IN REINFORCING BARS, SHOWN ON THE DRAWINGS BUT NOT DIMENSIONED, SHALL CONFORM TO END HOOKS IN REINFORCING BARS, SHOWN ON THE DRAWINGS BUT NOT DIMENSIONED, SHALL CONFORM TO ACI 318 f. CONCRETE COVER OVER REINFORCEMENT SHALL BE 2" CLEAR, EXCEPT CONCRETE PLACED AGAINST AND CONCRETE COVER OVER REINFORCEMENT SHALL BE 2" CLEAR, EXCEPT CONCRETE PLACED AGAINST AND PERMANENTLY IN CONTACT WITH EARTH SHALL BE 3" CLEAR g. REINFORCEMENT SPLICES NOT PERMITTED EXCEPT AS DETAILED OR AUTHORIZED BY ENGINEER. LAP REINFORCEMENT SPLICES NOT PERMITTED EXCEPT AS DETAILED OR AUTHORIZED BY ENGINEER. LAP REINFORCING BARS THE FOLLOWING MINIMUMS AT ALL SPLICES, CORNERS AND INTERSECTIONS UNLESS OTHERWISE INDICATED. TOP BARS ARE HORIZONTAL BARS WITH MORE THAN 12" OF CONCRETE CAST BELOW THE BAR. BAR SIZE REG. BARS TOP BARS REG. BARS TOP BARS TOP BARS #3 1'-3" 1'-7" 1'-3" 1'-7" 1'-7" #4 1'-7" 2'-1" 1'-7" 2'-1" 2'-1" #5 2'-0" 2'-7" 2'-0" 2'-7" 2'-7" #6 2'-5" 3'-1" 2'-5" 3'-1" 3'-1" #7 3'-6" 4'-6" 3'-6" 4'-6" 4'-6" #8 4'-0" 5'-2" 4'-0" 5'-2" 5'-2" #9 4'-6" 5'-10" 4'-6" 5'-10" 5'-10" #10 5'-1" 6'-7" 5'-1" 6'-7" 6'-7" h. STAGGER ADJACENT REINFORCEMENT LAP SPLICES IN WALLS 18" MINIMUM STAGGER ADJACENT REINFORCEMENT LAP SPLICES IN WALLS 18" MINIMUM i. PROVIDE BAR SUPPORTS TO PROPERLY SECURE AND SUPPORT REINFORCING BARS AT POSITIONS SHOWN ON PROVIDE BAR SUPPORTS TO PROPERLY SECURE AND SUPPORT REINFORCING BARS AT POSITIONS SHOWN ON THE DRAWINGS. IN ADDITION TO NORMAL ACCESSORIES PROVIDE #5 STANDEES AT 36" O.C. TO SUPPORT TOP REINFORCEMENT IN BASE SLABS, AND #3 U OR Z SHAPE SPACERS AT 72" O.C. EACH WAY IN WALLS WITH TWO CURTAINS OF REINFORCEMENT. j. DOWELS, PIPES AND OTHER INSTALLED MATERIALS AND ACCESSORIES SHALL BE HELD SECURELY IN DOWELS, PIPES AND OTHER INSTALLED MATERIALS AND ACCESSORIES SHALL BE HELD SECURELY IN POSITION DURING CONCRETE PLACEMENT k. REINFORCING BARS AND ACCESSORIES SHALL NOT BE IN CONTACT WITH ANY PIPE, PIPE FLANGE OR METAL REINFORCING BARS AND ACCESSORIES SHALL NOT BE IN CONTACT WITH ANY PIPE, PIPE FLANGE OR METAL PART EMBEDDED IN CONCRETE. PROVIDE 2" CLEARANCE IN ALL CASES UNLESS OTHERWISE INDICATED. NO EMBEDDED ITEM SHALL BE SUSPENDED FROM, SUPPORTED BY, OR BRACED IN PLACE FROM THE STRUCTURAL REINFORCEMENT. l. LOCATE CONSTRUCTION JOINTS AS SHOWN ON THE DRAWINGS OR AS AUTHORIZED BY ENGINEER LOCATE CONSTRUCTION JOINTS AS SHOWN ON THE DRAWINGS OR AS AUTHORIZED BY ENGINEER m. THOROUGHLY CLEAN BY MECHANICAL SCARIFICATION ALL BONDED CONSTRUCTION JOINTS PRIOR TO PLACING THOROUGHLY CLEAN BY MECHANICAL SCARIFICATION ALL BONDED CONSTRUCTION JOINTS PRIOR TO PLACING CONCRETE IN ADJACENT POUR n. BEGIN SPACING OF BARS WHICH PARALLEL CONSTRUCTION AND EXPANSION JOINTS 2" CLEAR FROM EACH BEGIN SPACING OF BARS WHICH PARALLEL CONSTRUCTION AND EXPANSION JOINTS 2" CLEAR FROM EACH SIDE OF JOINT o. CHAMFER ALL EXPOSED CONCRETE EDGES 3/4", UNLESS OTHERWISE INDICATEDCHAMFER ALL EXPOSED CONCRETE EDGES 3/4", UNLESS OTHERWISE INDICATED

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RECTANGULAR OPENINGS

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CIRCULAR OPENINGS

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SIZE

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BAR

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DOUBLE MAT CORNER

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DOUBLE MAT WALL INTERSECTION

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(4) #4 BAR (TYP.)#4 BAR (TYP.)

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BEND REINFORCING AS NECESSARY AT JOINTS OR OTHER OBSTRUCTION

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1. 'AS' = ADDITIONAL BARS EQUAL IN TOTAL NUMBER TO 'AS' = ADDITIONAL BARS EQUAL IN TOTAL NUMBER TO REGULAR REINFORCEMENT CUT BY THE OPENING. PLACE ONE-HALF TOTAL BARS TO EACH SIDE OF OPENING & IN THE SAME TRANSVERSE POSITION AS THE REGULAR REINFORCEMENT. 2. 'AS' BAR SIZE TO BE SAME AS REGULAR REINFORCEMENT 'AS' BAR SIZE TO BE SAME AS REGULAR REINFORCEMENT IN EACH DIRECTION 3. THIS DETAIL APPLIES UNLESS ADDITIONAL REINFORCEMENT THIS DETAIL APPLIES UNLESS ADDITIONAL REINFORCEMENT SPECIFICALLY INDICATED AT OPENINGS ON DRAWINGS 4. ADDITIONAL BARS TO BE PLACED AT CENTERLINE OF WALL ADDITIONAL BARS TO BE PLACED AT CENTERLINE OF WALL OR SLAB WHERE ONE LAYER OF REINFORCING IS PROVIDED AND AT EACH FACE WHERE TWO LAYERS OF REINFORCING ARE PROVIDED 5. ADDITIONAL HORIZONTAL AND VERTICAL BARS ARE NOT ADDITIONAL HORIZONTAL AND VERTICAL BARS ARE NOT NECESSARY FOR HOLES 8 TO 11 INCHES. USE ONLY THE DIAGONAL BARS. FOR HOLES SMALLER THAN 8 INCHES DO NOT CUT BARS, SPREAD NORMAL REINFORCING AROUND HOLE (NO DIAGONALS NEEDED).

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NOTE: 1. STANDARD LAP; SEE GENERAL NOTE 6GSTANDARD LAP; SEE GENERAL NOTE 6G

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NOTE: 1. STANDARD LAP; SEE GENERAL NOTE 6GSTANDARD LAP; SEE GENERAL NOTE 6G

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STANDARD LAP

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STD. LAP IF MONOLITHIC

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START LAP 4" FROM WALL

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STD. LAP W/ JOINT

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STANDARD LAP

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START LAP 4" FROM WALL

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STD. LAP W/ JOINT

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BEND REINFORCING AS NECESSARY AT JOINTS OR OTHER OBSTRUCTION

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WALL OR SLAB OPENING

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WALL OR SLAB OPENING

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AutoCAD SHX Text #4x4'-0" DIAGONAL BAR (TYPICAL)

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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BAR ISLAND DAM MODIFICATIONS

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DAR

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GENERAL STRUCTURAL NOTES & DETAILS

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1300 Cedar Street Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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SHEET

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MALTA

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MONTANA

AutoCAD SHX Text Z:\ClientFiles\2021\Bureau of Land Management\210308 IDIQ\(38) Bar Island Dam Reconstruction\6 Drawings\1 Autocad\To Jakola\SC-GN-ST-12652-01.dwg LAST SAVED: 2/5/2026 3:48 PM

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BAR ISLAND DAM MODIFICATIONS

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DAR

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IME

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RCR

AutoCAD SHX Text 12-22-25

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DAR

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DATE:

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DATE:

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DATE:

AutoCAD SHX Text 12-22-25

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RATING CURVES

AutoCAD SHX Text G4

BH-1 BH-2

BH-3

TP-3

TP-1

TP-2

GCP-10

GCP-16

GCP-17

GCP-13 GCP-14

CP#1

CP#2

CP#3

CP#5

TP-4

CP#4

DH-1

POINT COORDINATE TABLE

POINT

NORTHING

1275187.31 1275154.55 1274720.31 1274453.52 1275042.42

EASTING

2196105.67 2194886.32 2194796.49 2195578.05 2195785.01

ELEVATION

3000.617 2922.720 2959.514 2906.396 2924.429

DESCRIPTION

2" A.C.

3.25 BLM A.C.

BAR ISLAND DAM

406-442-0370

1300 Cedar Street Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

BASIS OF SURVEY

THIS PROJECT WAS SURVEYED ON THE MONTANA ZONE 2500 STATE PLANE

COORDINATE SYSTEM USING RTK GPS. THE PROJECT WAS BROUGHT TO

GROUND AT SURVEY CONTROL POINT CP-1. THE GEODETIC DATUM IS

NAD83(CONUS). THE VERTICAL DATUM IS NAVD88 (GEOID18). HORIZONTAL

AND VERTICAL UNITS ARE SURVEY FEET AT GROUND DISTANCES.

PROJECT CONTROL WAS ESTABLISHED BY OPUS POSITION AT POINT 1. VALUES

FOR POINTS 2-4 WERE DETERMINED BY REDUNDANT RTK GPS OBSERVATIONS

FROM POINT 1.

POINT CP-1 OPUS POSITION:

STATE PLANE COORDINATES:

N: 1,275,187.31' E: 2,196,105.67'

ELEV.: 3000.62'

COMBINED SCALE FACTOR: 0.99933335

CONVERGENCE: 0.67705278°

* BACKGROUND IMAGE IS FROM DECEMBER 2024 DRONE FLIGHT COMPLETED

BY DOWL.

* CONTOURS SHOWN ARE GENERATED FROM THE DECEMBER 2024 DRONE

FLIGHT DATA.

* NO BATHYMETRIC SURVEY WAS PERFORMED. CONTOURS WERE PROJECTED

BELOW WATER LEVEL BASED ON RECORD DRAWING INFORMATION FOR

DESIGN PURPOSES.

LEGEND

TP-3

BH-3

DH-1

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SCALE IN FEET

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

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DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

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MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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SHEET

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MALTA

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MONTANA

AutoCAD SHX Text Z:\ClientFiles\2021\Bureau of Land Management\210308 IDIQ\(38) Bar Island Dam Reconstruction\6 Drawings\1 Autocad\To Jakola\SA-CS-EX-12652-01.dwg LAST SAVED: 12/11/2025 5:22 PM

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BAR ISLAND DAM MODIFICATIONS

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DAR

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IME

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RCR

AutoCAD SHX Text 12-22-25

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DAR

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DATE:

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DATE:

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DATE:

AutoCAD SHX Text 12-22-25

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SA-CS-EX-12652-01.DWG

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SITE PLAN AND SURVEY CONTROL

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EXISTING OUTLET STRUCTURE TOP STRUCTURE = 2901.0

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EXISTING 30" PIPE INVERT = 2874.20'

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EXISTING 30" PIPE

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RESERVOIR

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CP-1

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SURVEY CONTROL POINT, SURVEYED NOV. 26, 2024

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TEST PIT EXCAVATED ON DEC. 5, 2024

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ICE/WATER SURFACE ELEVATION ON DATE OF SURVEY ~2901.3

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BORE HOLE DRILLED ON DEC. 4, 2024

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CONSTRUCTION LIMITS

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DH-1 DRILL HOLE DRILLED IN 1965 BY NORTHERN TESTING LABORATORIES

AutoCAD SHX Text *ICE/*WATER LEVEL IN THE RESERVOIR (~2901.3) AND STILLING BASIN (~2875.8) AT THE TIME OF THE SURVEY. CONTOURS BELOW WATER LEVEL ARE BASED ON RECORD DRAWING INFORMATION AND WERE ASSUMED FOR DESIGN PURPOSES.

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POTENTIAL BORROW AREA

SEE BLM CONTRACT FOR ENTIRE CONSTRUCTION LIMITS. COORDINATE TABLE FOR CONSTRUCTION LIMITS IS AVAILABLE UPON REQUEST.

BAR ISLAND DAM

1300 Cedar Street Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

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SCALE IN FEET

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

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DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

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MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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SHEET

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MALTA

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MONTANA

AutoCAD SHX Text Z:\ClientFiles\2021\Bureau of Land Management\210308 IDIQ\(38) Bar Island Dam Reconstruction\6 Drawings\1 Autocad\To Jakola\SC-CS-EMB-EXCV-12652-01.dwg LAST SAVED: 12/11/2025 5:52 PM

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BAR ISLAND DAM MODIFICATIONS

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DAR

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IME

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RCR

AutoCAD SHX Text 12-22-25

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DAR

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DATE:

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DATE:

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DATE:

AutoCAD SHX Text 12-22-25

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SC-CS-EMB-EXCV-12652-01.DWG

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DAM EMBANKMENT EXCAVATION PLAN AND PROFILE

AutoCAD SHX Text C2

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RESERVOIR

AutoCAD SHX Text *ICE/*WATER LEVEL AT TIME OF SURVEY ~2901.3. CONTOURS BELOW WATER ARE BASED ON RECORD DRAWING INFORMATION AND WERE ASSUMED FOR DESIGN PURPOSES. ACTUAL FIELD CONDITIONS MAY VARY.

AutoCAD SHX Text

REMOVE EXISTING 42" STEEL OUTLET WORKS RISER

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FINISHED GRADE AT DAM CONTROL LINE

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OUTLET WORKS EXCAVATION PROFILE AT

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REMOVE EXISTING 30" STEELOUTLET WORKS CONDUIT AND CONC. CUTOFF COLLARS

AutoCAD SHX Text

AutoCAD SHX Text 2.5

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EXISTING GROUND AT DAM CONTROL LINE

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REMOVE EXISTING 30" STEEL OUTLETCONDUIT

AutoCAD SHX Text 20'

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CLEARING LIMITS

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POTENTIAL BORROW AREA

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POTENTIAL BORROW AREA

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CLEARING LIMITS

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EXCAVATION LIMIT AND TOPSOIL STRIPPING AREA.

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CONCRETE DISPOSAL AREA

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EXCAVATION LIMIT AND TOPSOIL STRIPPING AREA.

REMOVE WOODY VEGETATION ON UPSTREAM AND DOWNSTREAM SLOPES OF DAM.

BH-1 BH-2

BH-3

DETAIL

TYPICAL GRAVEL ROAD SECTION 406-442-0370

1300 Cedar Street Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

BAR ISLAND DAM

AutoCAD SHX Text

AutoCAD SHX Text C3

AutoCAD SHX Text D1

AutoCAD SHX Text

AutoCAD SHX Text D1

AutoCAD SHX Text C3

AutoCAD SHX Text

AutoCAD SHX Text C3

AutoCAD SHX Text

AutoCAD SHX Text C3

AutoCAD SHX Text D1

AutoCAD SHX Text

AutoCAD SHX Text D1

AutoCAD SHX Text C3

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8" GRAVEL ROAD SURFACING

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12" DEEP GRAVEL ROAD SURFACING

AutoCAD SHX Text -2%

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8" GRAVEL ROAD SURFACING

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VARIES

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8" COMPACTED SUBGRADE SOIL

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EMBANKMENT STRIP

AutoCAD SHX Text -2%

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VARIES

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STABILIZATION FABRIC

AutoCAD SHX Text 10.00

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VARIES

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CHECK BERMS

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STATION

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RIGHT OFFSET

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LEFT OFFSET

AutoCAD SHX Text 10+00

AutoCAD SHX Text 11+00

AutoCAD SHX Text 12+00

AutoCAD SHX Text 13+00

AutoCAD SHX Text 10'

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OFFSETS ARE MEASURED TO THE CENTER OF THE CHECK BERM.

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TOE DRAIN POINT TABLE

AutoCAD SHX Text 1,275,024.78

AutoCAD SHX Text 2,195,746.36

AutoCAD SHX Text 2904.0

AutoCAD SHX Text 1,274,991.46

AutoCAD SHX Text 2,195,703.09

AutoCAD SHX Text 2889.0

AutoCAD SHX Text 1,274,960.87

AutoCAD SHX Text 2,195,567.88

AutoCAD SHX Text 1,274,927.78

AutoCAD SHX Text 2,195,421.57

AutoCAD SHX Text 2875.2

AutoCAD SHX Text

NORTHING

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EASTING

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INVERT

AutoCAD SHX Text 2878.5

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SCALE IN FEET

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

AutoCAD SHX Text

DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

AutoCAD SHX Text

MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

AutoCAD SHX Text

BUREAU OF LAND MANAGEMENT

AutoCAD SHX Text

SHEET

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MALTA

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MONTANA

AutoCAD SHX Text Z:\ClientFiles\2021\Bureau of Land Management\210308 IDIQ\(38) Bar Island Dam Reconstruction\6 Drawings\1 Autocad\To Jakola\SC-CS-EMB-CREST-FG-12652-01.dwg LAST SAVED: 2/5/2026 3:48 PM

AutoCAD SHX Text

BAR ISLAND DAM MODIFICATIONS

AutoCAD SHX Text

DAR

AutoCAD SHX Text

IME

AutoCAD SHX Text

RCR

AutoCAD SHX Text 12-22-25

AutoCAD SHX Text

DAR

AutoCAD SHX Text

DATE:

AutoCAD SHX Text

DATE:

AutoCAD SHX Text

DATE:

AutoCAD SHX Text 12-22-25

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SC-CS-EMB-CREST-FG-12652-01.DWG

AutoCAD SHX Text

DAM EMBANKMENT PLAN AND PROFILE

AutoCAD SHX Text C3

AutoCAD SHX Text

NEW RIPRAP STILLING BASIN

AutoCAD SHX Text

RESERVOIR

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AutoCAD SHX Text 2.5

AutoCAD SHX Text

SPILLWAY SEE SHEET SW1

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EXISTING GROUND AT DAM CONTROL LINE

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NEW TOP OF EMBANKMENT AT DAM CONTROL LINE

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NEW OUTLET WORKS CONDUIT

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* RESERVOIR WATER LEVEL AT TIME OF SURVEY ~2901. CONTOURS BELOW WATER WERE ASSUMED FOR DESIGN PURPOSES. ACTUAL FIELD CONDITIONS MAY VARY.

AutoCAD SHX Text

NEW OUTLET WORKS RISER

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SPILLWAY

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APPROXIMATE ORIGINAL GROUND FROM 1967 BAR ISLAND DETENTION DAM

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APPROXIMATE LOCATION OF STICK LOGS FROM 1967 BAR ISLAND DETENTION DAM (TYP)

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DH-1

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GRAVEL

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SHALE

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SHALE

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SHALE

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GRAVEL

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DH-2

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DH-3

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DH-4

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DH-5

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SHALE

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GRAVEL

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SHALE

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36" RCP OUTLETWORKS CONDUIT

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NEW POLYMER COATED 18" CMP CULVERT

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SAND FILTER DIAPHRAGM

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10' WIDE GRAVEL ACCESS ROAD

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SHALE

AutoCAD SHX Text B-1

AutoCAD SHX Text B-2

AutoCAD SHX Text

AutoCAD SHX Text B-3

AutoCAD SHX Text

SHALE

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2' CHIMNEY KEY

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AutoCAD SHX Text 2.5

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BEGIN TOE DRAIN INSTALL CLEAN OUT IE. 2904.0

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INSTALL 6" TOE DRAIN

AutoCAD SHX Text

IE. 2889.0

AutoCAD SHX Text

IE. 2875.2 FT

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SAND FILTER DIAPHRAGM

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CONSTRUCTION LIMITS

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CHECK BERMS, TYP.

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CHECK BERMS, TYP.

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START GRAVEL AT STA. 3+00

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END GRAVEL AT STA. 13+96

AutoCAD SHX Text

BENCH INTO THE EXISTING EMBANKMENT, EXCEPT AT CHIMNEY DURING FILL PLACEMENT.

SWITCH TO SOLID PIPE AND NATIVE SOIL BACKFILL.

DETAIL

TYPICAL CLEANOUT

CO-1

DETAIL

TOE DRAIN

DETAIL

TOE DRAIN

406-442-0370

1300 Cedar Street Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

DETAIL

TOE DRAIN OUTFALL

NOT TO SCALE

AutoCAD SHX Text

6" HDPE PERFORATED PIPE, I.E. VARIES

AutoCAD SHX Text

GRAVEL DRAIN

AutoCAD SHX Text 5'

AutoCAD SHX Text 4'

AutoCAD SHX Text

COMPACTED EMBANKMENT

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6" HDPE NON-PERF.RISER

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6" HDPEPERFORATED PIPE

AutoCAD SHX Text INSTALL STEEL PIPE WITH LOCKING COVER. STEEL PIPE TO EXTEND 2' ABOVE GROUND SURFACE.

AutoCAD SHX Text

22 BEND 12° BEND(TYP.)

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4' MIN.

AutoCAD SHX Text INSTALL 6' LONG 6" DIA. WOOD POST NEAR CLEANOUT IN LOCATION DIRECTED BY GOVERNMENT. WOOD POSTS TO BE PRESSURE-TREATED.

AutoCAD SHX Text

REMOVABLE CAP

AutoCAD SHX Text D1

AutoCAD SHX Text C3

AutoCAD SHX Text

AutoCAD SHX Text D1

AutoCAD SHX Text C3

AutoCAD SHX Text

FILTER SAND

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ADD 6" (MIN) BTW. BENDS

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6" NON-PERFORATED HDPE PIPE, I.E. VARIES

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COMPACTED EMBANKMENT

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AutoCAD SHX Text D1

AutoCAD SHX Text C3

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

AutoCAD SHX Text

DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

AutoCAD SHX Text

MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

AutoCAD SHX Text

BUREAU OF LAND MANAGEMENT

AutoCAD SHX Text

SHEET

AutoCAD SHX Text

MALTA

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MONTANA

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BAR ISLAND DAM MODIFICATIONS

AutoCAD SHX Text

DAR

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IME

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RCR

AutoCAD SHX Text 12-22-25

AutoCAD SHX Text

DAR

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DATE:

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DATE:

AutoCAD SHX Text

DATE:

AutoCAD SHX Text 12-22-25

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SC-CS-EMB-CREST-FG-12652-01.DWG

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TOE DRAIN DETAILS

AutoCAD SHX Text D1

AutoCAD SHX Text

2.5' GROUTING

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2875.2 FT

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ENCASE PPE PIPE THROUGH RIPRAP WITH 8" TYPE 304STAINLESS STEEL PIPE

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TOP OF GROUT ON HEADWALL

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2873.8 FT

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8" EXTERIOR RODENTGUARD, AGRIDRAIN OR APPROVED EQUAL

AutoCAD SHX Text

AutoCAD SHX Text D1

AutoCAD SHX Text C3

AutoCAD SHX Text

DEPTH VARIES

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NON-PERFORATED 6" HDPE PIPE FOR FINAL 150 FEET.

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2' RIPRAP

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GEOTEXTILE FILTER FABRIC

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NATIVE SOIL BACKFILL

AutoCAD SHX Text NOTE: GRAVEL DRAIN MUST EXTEND 1' BEYOND THE PERFORATIONS AND THE FILTER SAND MUST EXTEND AT LEAST 2' BEYOND THE END OF THE DRAIN GRAVEL.

NOTE: GRAVEL DRAIN MUST EXTEND 1' BEYOND THE PERFORATIONS AND THE FILTER SAND MUST EXTEND AT LEAST 2' BEYOND THE END OF THE DRAIN GRAVEL.

Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

AutoCAD SHX Text

SCALE IN FEET

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

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DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

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MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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SHEET

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MALTA

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MONTANA

AutoCAD SHX Text Z:\ClientFiles\2021\Bureau of Land Management\210308 IDIQ\(38) Bar Island Dam Reconstruction\6 Drawings\1 Autocad\To Jakola\SC-CS-EMB-CREST-XS-12652-01.dwg LAST SAVED: 12/19/2025 2:51 PM

AutoCAD SHX Text

BAR ISLAND DAM MODIFICATIONS

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DAR

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IME

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RCR

AutoCAD SHX Text 12-22-25

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DAR

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DATE:

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DATE:

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DATE:

AutoCAD SHX Text 12-22-25

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SC-CS-EMB-CREST-XS-12652-01.DWG

AutoCAD SHX Text

DAM EMBANKMENT SECTIONS STA. 3+50 TO STA. 4+25

AutoCAD SHX Text

EX1

AutoCAD SHX Text

EXISTING GROUND

AutoCAD SHX Text

FINISHED GROUND

AutoCAD SHX Text

EXCAVATION LIMITS

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APPROX. STRIPPED EXISTING GROUND

SAND FILTER DIAPHRAGM

Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

AutoCAD SHX Text

SCALE IN FEET

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

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DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

AutoCAD SHX Text

MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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SHEET

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MALTA

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MONTANA

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BAR ISLAND DAM MODIFICATIONS

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DAR

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IME

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RCR

AutoCAD SHX Text 12-22-25

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DAR

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DATE:

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DATE:

AutoCAD SHX Text

DATE:

AutoCAD SHX Text 12-22-25

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SC-CS-EMB-CREST-XS-12652-01.DWG

AutoCAD SHX Text

DAM EMBANKMENT SECTIONS STA. 4+50 TO STA. 5+00

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EX2

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EXISTING GROUND

AutoCAD SHX Text

FINISHED GROUND

AutoCAD SHX Text

EXCAVATION LIMITS

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APPROX. STRIPPED EXISTING GROUND

AutoCAD SHX Text

SAND FILTER DIAPHRAGM

AutoCAD SHX Text

FILTER SAND BLANKET

AutoCAD SHX Text

INLET RISER

AutoCAD SHX Text

OUTLET CONDUIT

STILLING BASIN

Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

AutoCAD SHX Text

SCALE IN FEET

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

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DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

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MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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SHEET

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MALTA

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MONTANA

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BAR ISLAND DAM MODIFICATIONS

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DAR

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IME

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RCR

AutoCAD SHX Text 12-22-25

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DAR

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DATE:

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DATE:

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DATE:

AutoCAD SHX Text 12-22-25

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SC-CS-EMB-CREST-XS-12652-01.DWG

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DAM EMBANKMENT SECTIONS STA. 5+25 TO STA. 5+75

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EX3

AutoCAD SHX Text

EXISTING GROUND

AutoCAD SHX Text

FINISHED GROUND

AutoCAD SHX Text

EXCAVATION LIMITS

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APPROX. STRIPPED EXISTING GROUND

Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

AutoCAD SHX Text

SCALE IN FEET

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

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DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

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MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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SHEET

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MALTA

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MONTANA

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BAR ISLAND DAM MODIFICATIONS

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DAR

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IME

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RCR

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DAR

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DATE:

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DATE:

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DATE:

AutoCAD SHX Text 12-22-25

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SC-CS-EMB-CREST-XS-12652-01.DWG

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DAM EMBANKMENT SECTIONS STA. 6+00 TO STA. 6+50

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EX4

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EXISTING GROUND

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FINISHED GROUND

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EXCAVATION LIMITS

APPROX. STRIPPED EXISTING GROUND

Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

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SCALE IN FEET

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

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DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

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MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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SHEET

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MALTA

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MONTANA

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BAR ISLAND DAM MODIFICATIONS

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DAR

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IME

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RCR

AutoCAD SHX Text 12-22-25

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DAR

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DATE:

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DATE:

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DATE:

AutoCAD SHX Text 12-22-25

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SC-CS-EMB-CREST-XS-12652-01.DWG

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DAM EMBANKMENT SECTIONS STA. 6+75 TO STA. 7+25

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EX5

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EXISTING GROUND

FINISHED GROUND

SECTION

OUTLET WORKS CONDUIT ENCASEMENT AND SAND BLANKET

STA. 1+83.5 TO STA. 2+82

SECTION

36" Ø RCP OUTLET WORKS CONDUIT

CONCRETE RISER TO STA. 1+83.5

DETAIL

36" Ø RCP OUTLET WORKS CONDUIT

DETAIL

PRECAST CONCRETE

PIPE SUPPORT BLOCK

FOR 36" Ø RCP

406-442-0370

1300 Cedar Street Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

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VARIES

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VARIES

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VARIES

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36"%%C RCP OUTLET WORKS CONDUIT

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OW2

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VARIES

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AutoCAD SHX Text 36"

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RCP

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OUTLET WORKS

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CONCRETE BEDDING

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VARIES

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OW3

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OW3

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VARIES

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FINISHED DAM EMBANKMENT SURFACE

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COMPACTED EMBANKMENT

AutoCAD SHX Text PLACE & COMPACT COMPACTED LIME AMENDED FILL TO THE FILL LEVEL SHOWN PRIOR TO TRENCHING AND PLACEMENT OF OUTLET WORKS CONDUIT (TYP.) EL. VARIES

AutoCAD SHX Text 2882.70

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COMPACTED EMBANKMENT

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LIME AMENDED EMBANKMENT

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VARIES

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LIME AMENDED EMBANKMENT

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GEOTEXTILE STABILIZATION FABRIC

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GEOTEXTILE STABILIZATION FABRIC

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CONCRETE CAP

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1' FILTER SAND BLANKET

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OW3

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OW3

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12" MIN. COVER

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AutoCAD SHX Text 1.5'±

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OUTLET WORKS

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CONCRETE CAP

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CONCRETE BEDDING

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AutoCAD SHX Text 4.5'

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PIPE SUPPORT BLOCK BEYOND. SEE DETAIL 2, THIS SHT.

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36" RCP

AutoCAD SHX Text EXCAVATE TRENCH IN LIME AMENDED FILL AND REMOVE ALL LOOSE MATERIAL. TRENCH TO BE MAINTAINED IN MOIST CONDITION AND SHALL BE FILLED WITHIN 72 HOURS OF EXCAVATION.

AutoCAD SHX Text FINISH CAP SURFACE FROM STA. 1+02.5 TO STA. 2+70 IN ACCORDANCE w/ 03300-3.06

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FORM ENCASEMENT VERTICAL FROM STA. 1+83 TO STA. 1+86 (TYP. EACH SIDE)

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12" MIN.

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(12) #5'S EVENLY SPACED

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#5 HOOPS @ 12" O.C.

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OW3

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OW3

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36" RCP PIPE

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REBAR SUPPORT ROD SET AT A MINIMUM 2" CLEAR OF PIPE

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12" THICK CONCRETE SUPPORT BLOCK

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AutoCAD SHX Text 6"

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USE " SHIMS 14"± SHIMSFOR FINISH GRADE ADJUSTMENT

AutoCAD SHX Text NOTE: CONTRACTOR MAY USE SUPPORT BLOCKS WITH DIFFERENT DIMENSIONS OR MATERIALS THAN SHOWN. ALTERNATE SUPPORT BLOCK DETAILS MUST BE APPROVED BY THE GOVERNMENT.

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BUREAU OF LAND MANAGEMENT

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U.S. DEPARTMENT OF THE INTERIOR

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APPROVED BY:

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AUTOCAD NAME:

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DRAWN BY:

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CHECKED BY:

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DESIGN OFFICE:

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DATE:

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DOWL (FIELD SURVEY BY JACKOLA)

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MARK

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REVISION

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DATE

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APPROVED

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UNITED STATES DEPARTMENT OF THE INTERIOR

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BUREAU OF LAND MANAGEMENT

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SHEET

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MALTA

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MONTANA

AutoCAD SHX Text Z:\ClientFiles\2021\Bureau of Land Management\210308 IDIQ\(38) Bar Island Dam Reconstruction\6 Drawings\1 Autocad\To Jakola\SC-CS-OW-DT-12652-01.dwg LAST SAVED: 2/9/2026 4:54 PM

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BAR ISLAND DAM MODIFICATIONS

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DAR

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IME

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RCR

AutoCAD SHX Text 12-22-25

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DAR

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DATE:

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DATE:

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DATE:

AutoCAD SHX Text 12-22-25

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SC-CS-OW-DT-12652-01.DWG

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OUTLET WORKS TYPICAL SECTIONS AND DETAILS

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OW3

DETAIL

OUTLET WORKS RISER

SECTION

OUTLET WORKS TOWER

SECTION

TOWER FOUNDATION

DETAIL

VENT PIPE DEFLECTOR

DETAIL

DEFLECTOR PLATE

406-442-0370

1300 Cedar Street Helena, Montana 59601

WWW.DOWL.COM

4691.12652.01

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EL.=2901.00 FT

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OW4

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OW2

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AutoCAD SHX Text 72" CONCRETE MANHOLE SECTIONS w/ O-RING GASKETJOINTS (CRETEX CX-4 OR APPROVED EQUAL).

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4" STAINLESS STEELVENT PIPE

AutoCAD SHX Text GALVANIZED RAISED CONE GRATE TRASH RACK W/ ANTI-VORTEX PLATE. PLATE TO BE IN PARALLEL ALIGNMENT WITH OUTLET WORKS CONDUIT. RAISED CONE GRATE TO BE HAALA INDUSTRIES, INC. OR APPROVED EQUAL.

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CONCRETE GRADE SLAB

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AutoCAD SHX Text 6"

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36" RCP

AutoCAD SHX Text 1'-6"

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2875.90 FT

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1"/FT. SLOPE

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OW4

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OW4

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2920.5 FT

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STA. 1+66.5

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2878.90 FT

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STA. 1+02.2

AutoCAD SHX Text 4" STAINLESS STEEL VENT PIPE. SECURE VENT PIPE TOMANHOLE WITH GALVANIZED PIPE CLAMPS AT 5' O.C. MAX. FASTEN CLAMPS TO MANHOLE WITH S.S. ADHESIVE ANCHORS.

AutoCAD SHX Text 67.80'

AutoCAD SHX Text B

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OW4

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OW4

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CLR.

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NON-SHRINK GROUT VENT PIPE ENCASEMENT

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1.0' RIPRAP SLOPE PROTECTION

AutoCAD SHX Text ~73°

AutoCAD SHX Text 4'-6 1/2"

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GEOTEXTILE FILTER FABRIC

AutoCAD SHX Text PROVIDE PREFORMED NON-SWELLING WATERSTOP AROUND VENT PIPE. WATERSTOP SHALL MEET REQUIREMENTS OF SPECIFICATION SECTION 03300.

AutoCAD SHX Text STAINLESS STEEL SCREEN OVER END OF VENT PIPE. AGRIDRAIN EXTERNAL GUARD OR APPROVED EQUAL.

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4" STAINLESS STEELLONG RADIUS BEND

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1.0' RIPRAP SLOPE PROTECTION

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OW4

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OW4

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5/8" DIA. STAINLESS STEEL ADHESIVE ANCHOR WITH 5" MIN EMBED (6" TOTAL)

AutoCAD SHX Text MAINTAIN MIN. 6" CLEAR DEPTH BETWEEN TOP OF TOWER AND RIPRAP OR AS DIRECTED BY THE GOV'T"

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CONCRETE BEDDING

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8' MIN. BOTTOM WIDTH

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#6 @ 12" O.C. EA. WAY

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CLR.

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AutoCAD SHX Text 11'

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72" RCP MANHOLE

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OW4

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OW4

AutoCAD SHX Text #6 x 3'-6" (8 TOTAL)

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APPROX. LIMITS OF CONCRETE

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36" RCP PIPE

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TYP.

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6" MIN. THICKNESS

AutoCAD SHX Text USE HALF OF CMP OR SIMILAR AS FORM TO PROVIDE 6" MINIMUM THICKNESS OF GROUT AROUND THE VENT PIPE. CONTRACTOR SHALL SUBMIT FORM AND SUPPORT PLAN.

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NON-SHRINK GROUT VENT PIPE ENCASEMENT

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4" SS SS VENT PIPE

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OW4

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OW4

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PRECAST SLEEVES FOR…

This is the start of the file's text. The full file is on GovTribe.

File details come from the government source that posted it. Updated Mar 4, 2026.