Attach4.1240LU26Q0020Plans.pdf
PDF 6 MB Posted
- Solicitation number
- 1240LU26Q0020
- Issued by
-
Department of Agriculture Forest Service
About this file
This document is a construction plans document for the 2026 Riley Pass Bluff B Mine Waste Excavation Project, prepared by the U.S. Department of Agriculture Forest Service, Region One, for the Custer Gallatin National Forest, Sioux Ranger District, located in Harding County, South Dakota.
The project involves the excavation and consolidation of mine waste across two designated areas: Area 1 encompasses 225,000 cubic yards of mine waste excavation, while Area 2 encompasses 85,000 cubic yards. The construction plans detail specific requirements for waste handling, including the salvage and compaction of waste material within a designated channel with slopes no steeper than 2:1. The contractor must lay back channel side slopes at the start of construction, with the top 5 feet of the channel to be filled with compacted borrow material according to Section 204 specifications. Additional work includes the installation of a spring drain system requiring the clearing of the spring area to the sandstone layer, placement of 2-inch drain rock (minimum 10 feet wide by 3 feet deep by 200 feet in length), and placement of nonwoven Class 1 Type A geotextile over the imported open-graded aggregate. A temporary access road with 18-foot standard width surface, 3-8 percent outslope, 21-foot subgrade, and 6-inch compacted crushed scoria is specified. The plans require an on-site archaeologist during channel construction and temporary road work, utility location prior to ground-disturbing activities, and proper sediment management from the Road 3120 low water crossing, which shall be incorporated into the waste consolidation area fill.
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PROJECT
LOCATION
NO. DATEBYREVISION DESCRIPTION
SHEET NO.
SET NO.
PROJECT:
DATE:SHEET INDEX
CONSTRUCTION PLANS
SHEET 1 TITLE
SHEET 2 VICINITY
SHEET 3 PLAN VIEW AND DETAILS
DECEMBER 2025
N
2026 RILEY PASS BLUFF B MINE WASTE
EXCAVATION PROJECT
CONSTRUCTION PLANS FOR
U.S. DEPARTMENT OF AGRICULTURE
FOREST SERVICE
REGION ONE
CUSTER GALLATIN NATIONAL FOREST
SIOUX RANGER DISTRICT
HARDING COUNTY, SOUTH DAKOTA
AREA MAP
APPROVED BY:
RECOMMENDED BY:
ON SCENE COORDINATOR
CUSTER GALLATIN NATIONAL FOREST
DATE
RECOMMENDED BY:
FOREST ENGINEER
CUSTER GALLATIN NATIONAL FOREST
DATE
DISTRICT RANGER
SIOUX RANGER DISTRICT
DATE
APPROVED BY:
FOREST SUPERVISOR
CUSTER GALLATIN NATIONAL FOREST
DATE
APPROVED BY:
R1 DIRECTOR OF ENGINEERING DATE
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RED LODGE
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CAMP CROOK
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BUFFALO
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GLENDIVE
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BAKER
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EKALAKA
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BROADUS
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INTERSTATE HIGHWAY
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U.S. ROUTE
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STATE ROUTE
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OTHER ROUTE
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ASHLAND
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HARDIN
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MINOT
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WILLISTON
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LEMMON
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SHERIDAN
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MONTANA
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GREAT FALLS
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CODY
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BOZEMAN
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BILLINGS
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MILES CITY
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NORTH
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DAKOTA
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SOUTH
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DAKOTA
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DICKINSON
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BONNERS FERRY
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MISSOULA
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LIBBY
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KALISPELL
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DILLON
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BUTTE
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GRANGEVILLE
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IDAHO
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HAMILTON
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SANDPOINT
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MOSCOW
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LEWISTON
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COEUR D'ALENE
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WHITE BIRD
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RIGGINS
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OROFINO
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HELENA
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BUFFALO
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WYOMING
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BOWMAN
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NOT TO SCALE
33303330
MINE WASTE EXCAVATION
AREA 1 225,000 CY
DISTURBANCE BOUNDARY
STRAW WATTLES, PLACE
BELOW TOE OF
EXCAVATION
EXCAVATION BOUNDARY
DISTURBANCE BOUNDARY
EXCESS WASTE EXCAVATION AREA
FILL CHANNEL, COMPACT
ACCORDING TO SECTION
204 AND 206
MINE WASTE EXCAVATION
AREA 2 - 85,000 CY
PROPOSED MINE WASTE CONSOLIDATION AREA
COMPACTED WASTE FILL.
SLOPES NO STEEPER THAN 2:1
SPRING BORROW PLACEMENT
CHANNEL NOTES
1. CONTRACTOR SHALL LAY BACK CHANNEL SIDE SLOPES
AT START OF CONSTRUCTION.
2. WASTE TO BE SALVAGED DURING EXCAVATION AND
COMPACTED IN CHANNEL.
3. TOP 5' OF CHANNEL SHALL HAVE COMPACTED BORROW
4. COMPACT BORROW ACCORDING TO SECTION 204.
5. ARCHAEOLOGIST SHALL BE ON-SITE FOR ANY WORK AT
THE CHANNEL AND TEMP ROAD.
EXCESS WASTE EXCAVATION AREA IS RESERVED FOR
CHANNEL DETAIL
5' MIN
COMPACTED
BORROWCOMPACTED
WASTE
VARIES 2
SPRING DRAIN
1. CLEAR AND GRUB SPRING AREA. CLEAR CONSTANT
SLOPE TO SANDSTONE LAYER AS STAKED BY CO.
2. IMPORT 2" DRAIN ROCK AND PLACE MINIMUM 10' W X 3'
DEEP X 200' LENGTH
3. TIE EXCAVATION AND BORROW FROM TOP OF SPRING
DOWN TO SANDSTONE TOP AS STAKED BY THE CO.
4. COMPACT DRAIN ROCK ACCORDING TO SECTION 204.
5. PLACE NONWOVEN GEOTEXTILE OVER TOP OF IMPORTED
2" OPEN GRADED AGGREGATE. GEOTEXTILE SHALL BE
CLASS 1 TYPE A.
TOP OF SPRING
TOE, TERMINATE AT SANDSTONE
SPRING DRAIN DETAIL
PLACE NONWOVEN CLASS 1 TYPE A
GEOTEXTILE OVER 2" AGGREGATE
BACKFILL. 12'X200'
DWG SHEET NO.
OF
SHEET
9/2 8/1
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CHECKEDDESIGNERDATEDRAWING TITLE
United States Department of Agriculture Forest Service
NO. DATEBYREVISION DESCRIPTION01
NORTHERN REGION
FY26 RILEY PASS BLUFF B MINE WASTE
EXCAVATION PROJECT
CUSTER GALLATIN NF
SIOUX RANGER DISTRICT
SITE DETAILS
NOVEMBER 18, 2025
DS PW
3 3
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| 4E: | |
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| 0 0 0 I I 0 ii: | |
| Welch Fire Trail Road: | |
| undefined: | |
| I: | |
| 2026-01-05T12:27:41-0700 | |
| KURT HANSEN |
| 2026-01-05T13:18:38-0700 | |
| JEFFERSON FRADY |
| 2026-01-05T11:31:46-0700 | |
| PETER WERNER |
| 2026-01-05T15:01:40-0700 | |
| MATTHEW JEDRA |
| 2026-01-06T12:32:29-0700 | |
| CORRINE KEGEL |
File details come from the government source that posted it. Updated .