3. Feature Work List DQ1 PKAA 2026-0376.pdf
PDF 559 KB Posted
- Attached to
- PKAA, Maggie Gulch Project
- Solicitation number
- DQ1 PKAA 2026000376 1
- Issued by
- Rio Blanco County, Colorado
About this file
This Feature Work List document is a technical specification sheet for mine closure work at the Maggie Gulch Project in Colorado, managed by the PKAA (Public Lands Partnership or similar authority). The project encompasses the closure and remediation of eleven mine features including adits, shafts, and stopes across the Maggie Gulch site using various methods such as bat grates, corrugated steel pipes, polyurethane foam, and backfill. The work involves detailed specifications for each feature, including excavation dimensions, depth measurements, drainage characteristics, closure methods, UTM coordinates, and access routes. Features range from adit Feature 02 requiring a 15-foot corrugated steel pipe with bat grate installation to Feature 08, a shaft requiring backfill using on-site materials. Access methods vary considerably across sites, with most features requiring walking access only over distances ranging from one-fifth mile to three-quarter mile, with several recommending helicopter access due to terrain difficulty, elevation changes of 200 to 550 vertical feet, and challenging topography such as talus scrambles.
The work specifications are supported by Standard Drawings SWS 2, 9, 10, and 13, with detailed engineering drawings referenced in sheets 1 and 2. Several features are designated as BLM (Bureau of Land Management) controlled sites, indicating potential federal land involvement. The project appears to prioritize cultural resource protection, specifically requiring that historic artifacts be left in place and protected during work, particularly at Feature 03 where debris and artifacts will be preserved during polyurethane foam installation. Equipment access is limited across most sites, with Feature 08 being the only location allowing off-road equipment access with minor road improvements. The document provides comprehensive work descriptions and notes for bidder guidance, establishing clear requirements for site mobilization, material quantities (ranging from 5 to 40 cubic yards of polyurethane foam depending on feature), and coordination protocols with landowners and project managers prior to work commencement.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| 2. Location Maps DQ1 PKAA 2026-0376.pdf | ||
| 1. Special Conditions DQ1 PKAA 2026-0376.pdf | ||
| 6. List of Equipment Form.docx | DOCX document | |
| 4. SHEAP DQ1 PKAA 2026-0376.pdf | ||
| 5. Bid Schedule DQ1 PKAA 2026-0376.pdf |
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Text version
Maggie Gulch – Feature Work List Feature ID Type Description of Mine
Opening Closure Method
General Bid Specifications and
Drawings
UTM
(X,Y)
NAD83
Work Description / Notes
(BLM) Adit
Excavated:4ft by 7ft Eroded:2ft by 4ft Present:4ft by 7ft
Depth:100+ ft Lining:Rock Drainage:No
Corrugated Steel Pipe with Bat Grate
SWS 10 & SWS 9.
Standard Drawing
No. 5 & 6 (Sheet 2).
276909.88 4189224.90
15ft long, 2ft diameter CSP with bat grate. Utilize 5 cubic yards of polyurethane foam to set the pipe and backfill the final 3 feet of the pipe with onsite fill materials. Walking access only from CR23, 150 vertical feet, 360 horizontal feet. Helicopter access suggested.
03 Shaft
Excavated:7ft by 7ft Eroded:15ft by 15ft Present:15ft by 15ft
Depth:30 ft Lining:Concrete
Drainage:No
Polyurethane Foam
SWS 9 for Polyurethane Foam
(PUF).
276734.02 4188120.03
Place a bottom form at 18 feet and pour 13 vertical feet with 24 cubic yards of PUF. Leave all historic artifacts in place while pouring. The debris that is collapsed into the shaft can be used to help make the bottom form.
The artifacts in and around the shaft will be protected to prevent them from being covered in PUF. Common fill for the top will be installed4 days afterthe PUFhas cured. Common fill will be scavenged from the parking area to avoid disturbing the historic artifacts around the shaft. Park at the site at the end of CR23, equipment access available, but no disturbance of artifacts is allowed.
(BLM) Adit
Excavated:6ft by 7ft Eroded:6ft by 7ft Present:6ft by 7ft
Depth:80 ft Lining:Rock
Drainage:Yes
Bat Grate SWS 13 Standard
Drawing No. 6 (Sheet 1 & 2)
276065.01 4187971.02
Bat Grate. Walking access only from the end of CR23 road. 3/4 of a mile hike and 550 vertical feet. Helicopter access suggested.
05 Adit
Excavated:6ft by 7ft Eroded:6ft by 7ft Present:6ft by 7ft
Depth:100+ ft Lining:Rock Drainage:No
Bat Grate with Access Door
SWS 13 Standard Drawing No. 6 (Sheet
1 & 2)
274783.08 4195332.00
Bat Grate with 2ft x 2ft Access Door. Walking access only from Eureka Campground. 1/3 of a mile hike and
500 vertical feet with a steep talus scramble. Helicopter access suggested.
Opening Closure Method
General Bid Specifications and
Drawings
UTM
(X,Y)
NAD83
Work Description / Notes
(BLM) Adit
Excavated:10ft by 12ft
Eroded:10ft by 12ft Present:10ft by 12ft
Depth:20+ ft Lining:Rock
Drainage:Yes
Bat Grate SWS 13 Standard
Drawing No. 6 (Sheet 1 & 2)
265382.07 4189752.03
Bat Grate. Walking access only from Bakers Park trailhead parking lot, 1/5 of a mile hike that is relatively flat.
08 Shaft
Excavated:15ft by 20ft
Eroded:15ft by 20ft Present:15ft by 20ft
Depth:30 ft Lining:Rock +
Timber Drainage:No
Backfill SWS 2 264923.92 4185247.07
Backfill. No rock fill required, utilize on-site fill materials immediately around the hole. Backfill with equipment.
Off-road equipment access possible with minor improvements on 1/5 of a mile of road and 200 feet vertical down to the site. Coordinate road access with the Landowner and the Project Manager prior to mobilizing to the site.
09 Shaft
Excavated:8ft by 8ft Eroded:8ft by 8ft Present:8ft by 8ft
Depth:25+ ft Lining:Rock
Drainage:Yes
Polyurethane Foam SWS 9 272608.09
4202778.07
Polyurethane Foam, set bottom form at 22 feet. Pour 40 CY of PUF. No equipment access, walk 1/4 mile from
CR18 up to the site, 350 vertical feet. Helicopter access suggested.
10 Stope
Excavated:6ft by 30ft Eroded:6ft by 30ft Present:6ft by 30ft
Depth:100+ ft Lining:Rock Drainage:No
Bat Grate with Access Door
SWS 13 Standard Drawing No. 6 (Sheet
1 & 2)
264838.37 4185201.08
Bat Grate with 2ft by 2ft Access Door. The safety closure will be installed at an angle to match the opening which has vertical and horizontal components.
Park at the Power Pole access road and walk 200ft to the site and walk 50 vertical feet down to the site.
Opening Closure Method
General Bid Specifications and
Drawings
UTM
(X,Y)
NAD83
Work Description / Notes
11 Adit
Excavated:6ft by 7ft Eroded:2ft by 6ft Present:2ft by 6ft
Depth:100+ ft Lining:Rock Drainage:No
Corrugated Steel Pipe with Bat Grate and Access
Door
SWS 10 & SWS 9
Standard Drawing
No. 5 & 6 (Sheet 2).
264849.55 4185189.65
15 foot long, 2 foot diameter CSP with Bat Grate. Utilize 5 cubic yards of polyurethane foam to set the pipe and backfill the final 3 feet of the pipe with onsite fill materials. Park at the Power Pole access road and walk
200ft to the site and walk 50 vertical feet down to the site.
File details come from the government source that posted it. Updated .