Posted
Category
Site Description
10/23/2020
01 Background
The
Illinois Gulch Site is an area of historic mining activity along Boreas Pass
Road in Breckenridge, Colorado. Water from historic adits and natural seeps
drain through several large mine waste piles at the Site. This contaminated
water, characterized by elevated levels of heavy metals and low-pH, works its
way down the watershed to Illinois Gulch, the Blue River and ultimately Dillon
Reservoir.
The
Site is located in a residential area and several properties along Brooks Hill
Drive are immediately adjacent to the historic mine features. EPA has not
determined whether or not these properties have been impacted by mine waste but
investigations will be performed in Summer 2021.
Initial Response
10/23/2020
01 Background
EPA issued an Order to the owner of the historic mine features, TransAmerica, to
perform the following tasks:
a) reduce the flow of water from the adits by
preventing water from entering a nearby mine shaft;
b) control the flow of water through the wetland
and move it away from the waste piles;
c) install a passive remediation system to address water from the adits;
d) consolidate and cap the waste piles; and
e) sample nearby residential properties and
remediate them as necessary.
Response Objectives
10/23/2020
01 Background
Provide access to the Willard waste rock pile by constructing a driveway. The driveway will also provide access to discharges from the Willard No. 1 adit and the Willard No. 2 adit.
Conduct geotechnical investigation of the Willard waste rock pile to confirm that foundation conditions are suitable for its use as a repository for other Removal Action mine wastes and for closing the pile in-place.
Remove the existing pond to reduce saturation of the Willard waste rock pile.
Route Illinois Gulch creek in the vicinity of the Puzzle Extension Shaft through culverts or into a lined channel to reduce leakage into the mine workings and decrease discharge from the Willard No. 1 adit.
Remove the Puzzle Extension Shaft waste rock pile and place it in the Willard waste rock repository.
Engage the Colorado Division of Reclamation, Mining & Safety (DRMS) to install a concrete plug in the Puzzle Extension Shaft.
Remove waste rock associated with the Cally adit and place it in the Willard waste rock repository.
Direct flow from Willard No.1 and Willard No. 2 adits to a new sedimentation pond to promote drying of iron-stained sediment in wet areas. Remove the iron-stained sediment and place it in the Willard waste rock pile repository.
Conduct soil sampling at residential properties, and possible remediation through soil removal/replacement if sampling results indicate remediation of residential properties is appropriate. Place any excavated soil in the Willard waste rock pile repository.
Close the Willard waste rock pile repository by grading to eliminate depressions, covering with clean soil, and revegetating.
Monitor the Willard No. 1 and Willard No. 2 adit discharges for 1-2 years and conduct tests to identify and assess potential passive water treatment approaches.
Based on monitoring and testing, and if found to be practicable, design, construct, and operate a passive water treatment system to address the Willard No. 1 and Willard No. 2 adit discharges.
Response Activities
10/23/2020
02 Oct 23-30, 2020
EPA and TransAmerica have been working with local officials to announce their activities and obtain input on future plans. EPA's On-Scene Coordinator has also met with several nearby residents and will continue reaching out to stakeholders.
Planned Activities
10/23/2020
02 Oct 23-30, 2020
Most of TransAmerica’s work will be performed in the Summer and Fall of 2021. However, on October 29, 2020, TransAmerica crews will begin draining a spring-fed pond that sits next to the largest waste pile in
an effort to dry out the pile and make it easier to consolidate and shape next
summer. This water will be drained to Illinois Gulch under the authority of
EPA’s On-Scene Coordinator and the entire process should take 3-5 days. Although sample results indicate that the water in
the pond is not significantly contaminated, the pond will be drained slowly and
an EPA Team will be monitoring and collecting data throughout the draining
effort.
Operational Objectives
7/20/2021
03 Jul 12-17, 2021
The following are the Objectives for the Operational Period
of July 12 to July 17, 2021:
Install temporary collection and diversion system on Willard Adits 1 and 2.
Begin construction of the Site access road (with appropriate drainage).
Install environmental, erosion, and safety best management practices.
Clear vegetation as needed from waste pile and begin grading.
Current Activities
7/20/2021
03 Jul 12-17, 2021
The following are the current activities for the Operational Period of July 12 to July 17, 2021:
Construction of the access road began on July 12, 2021.
Installation of the temporary water diversion system was completed on July 13, 2021.
Clearing and grubbing of the vegetation on the waste pile was completed on July 13, 2021 and re-grading is now underway.
Site BMPs were installed on July 12, 2021.
Planned Activities
7/20/2021
03 Jul 12-17, 2021
For the next Operational Period, the removal team will be
continuing with the follow activities:
Remove metals ladened sediment from drainage paths around the waste pile and in Iron Gulch.
Pump the pooled water in front of Willard Adit 2 to evaluate the water seepage from the adit to the adjacent wetland.
Finish the access road including the installation of 3 culverts.
Complete the rough grade of the waste pile.
Operational Objectives
7/23/2021
04 Jul 19-23, 2021
The following are the Objectives for the Operational Period
of July 19 to July 23, 2021:
Continue construction of the Site access road (with appropriate drainage).
Clear vegetation as needed from waste pile and continue grading.
Maintain the temporary collection and diversion systems on Willard Adits 1 and 2.
Maintain environmental, erosion, and safety best management practices
Current Activities
7/23/2021
04 Jul 19-23, 2021
The following are the current activities being conducted for
the Operational Period of July 19 to July 23, 2021:
Compaction of the access road is currently underway.
Installation of two 36” culverts beneath the access road completed on July 21, 2021.
Clearing and grubbing of the vegetation on the waste pile was completed on July 19, 2021.
Re-grading of the Willard waste pile is currently underway.
Planned Activities
7/23/2021
04 Jul 19-23, 2021
For the next Operational Period, the removal team will be
continuing with the following activities:
Remove metals ladened sediment from the drainage paths around the waste pile and in Iron Gulch.
Finish the access road including the installation of 2 more culverts.
Complete the rough grade of the waste pile and begin cut to fill.
Stabilization of soil at the North West side of the Willard waste rock pile (tentative on the soil composition and strength at the North West toe of the waste rock pile).
Operational Objectives
8/2/2021
05 Jul 26-30, 2021
The following are the Objectives for the Operational Period
of July 26 to July 30, 2021:
Continue construction of the Site access road (with appropriate drainage).
Continue grading of Willard waste rock pile.
Clearing and grubbing for the access road as necessary.
Maintain the temporary collection and diversion systems on Willard Adits 1 and 2.
Maintain environmental, erosion, and safety best management practices.
Current Activities
8/2/2021
05 Jul 26-30, 2021
The following are the current activities being conducted for
the Operational Period of July 26 to July 30, 2021:
Construction of the access road on the North East side of the wetland is currently underway.
Installation of two 12” culverts completed on July 26.
Grading of the Willard waste pile is currently underway to allow for the stabilization of the soil at the Northern toe of the waste pile.
Planned Activities
8/2/2021
05 Jul 26-30, 2021
For the next Operational Period, the removal team will be
continuing with the following activities:
Finish the access road with adequate drainage.
Grade the Northern face of the Willard waste pile to allow access for the excavator.
Begin excavation of Northern toe of the Willard waste pile to allow the installation of Geo-mat, Geo-fabric and stabilizing rocks.
Operational Objectives
8/10/2021
06 Aug 02-06, 2021
The following are the Objectives for the Operational Period
of August 2 to August 6, 2021:
Finish the construction of the Site access road (with appropriate drainage).
Removal and relocation of peat at the Northern toe of the Willard waste rock pile.
Begin installation of stabilizing geofabric and rocks at the Northern toe of the Willard waste rock pile.
Continue grading of Willard waste rock pile.
Maintain the temporary collection and diversion systems on Willard Adits 1 and 2.
Maintain environmental, erosion, and safety best management practices.
Current Activities
8/10/2021
06 Aug 02-06, 2021
The following are the current activities being conducted for
the Operational Period of August 2 to August 6, 2021:
Construction of the access road and culverts was completed on August 4.
Peat and soil at the Northern toe of the Willard waste rock pile has been moved to install Geo fabrics and stabilizing rock.
Installation of geo fabric and rocks at the northern toe of the Willard waste rock pile is currently underway.
Peat removed from the northern toe of the Willard waste pile is currently being dried and relocated South East of the Willard waste pile.
The Cally waste rock pile has been moved and graded into the Willard waste pile.
Grading of the Willard waste pile is currently underway.
Planned Activities
8/10/2021
06 Aug 02-06, 2021
For the next Operational Period, the removal team will be
continuing with the following activities:
Continue installation of stabilizing geo fabrics and rocks at the Northern toe of the Willard waste rock pile.
Relocate removed and dried peat to the pond South East of the Willard waste rock pile.
Continue grading of Willard waste rock pile.
Operational Objectives
8/16/2021
07 Aug 09-13, 2021
The following are the Objectives for the Operational Period
of August 9 to August 13, 2021:
Continue the Removal and
relocation of peat at the Northern toe of the Willard waste rock pile.
Continue installation of
stabilizing geofabric and rocks at the Northern toe of the Willard waste
rock pile.
Continue grading of Willard
waste rock pile.
Maintain the temporary
collection and diversion systems on Willard Adits 1 and 2.
Maintain environmental,
erosion, and safety best management practices.
Current Activities
8/16/2021
07 Aug 09-13, 2021
The following are the current activities being conducted for
the Operational Period of August 9 to August 13, 2021:
Peat and soil at the Northern
toe of the Willard waste rock pile has been moved to install Geo fabrics
and stabilizing rock.
Continued Installation of geo
fabric and rocks at the northern toe of the Willard waste rock pile.
Continued Grading the Willard
waste rock pile.
Planned Activities
8/16/2021
07 Aug 09-13, 2021
For the next Operational Period, August 16 through August 20,
2021, the removal team will be continuing with the following activities:
Continue
installation of stabilizing geo fabrics and rocks at the Northern toe of
the Willard waste rock pile.
Relocate
removed and dried peat to the pond South East of the Willard waste rock
pile.
Continue
grading of Willard waste rock pile.
Operational Objectives
8/20/2021
08 Aug 16-20, 2021
The following are the Objectives for the Operational Period of August 16 to August 20, 2021:
Continue grading of Willard waste rock pile.
Regrade Southern pond slope and drainage channel.
Proceed with construction of future sediment pond
Maintain the temporary collection and diversion systems on Willard Adits 1 and 2.
Maintain environmental, erosion, and safety best management practices.
Current Activities
8/20/2021
08 Aug 16-20, 2021
The following are the current activities being conducted for the Operational Period of August 16 to August 20, 2021:
Southern pond area has been regraded and drainage channel reshaped and filled.
Reinforced the toe of the North and Northwest berm of the future sediment pond
Regrading pad area to continue constructing pond area
Continued Grading the Willard waste rock pile.
Planned Activities
8/20/2021
08 Aug 16-20, 2021
For the next Operational Period, August 23 through August 27, 2021, the removal team will be continuing with the following activities:
Cap with clay/topsoil and finalize regrading and construction of pond area
Begin excavation of the creek adjacent to the Puzzle shaft in preparation for headwall installation
Continue reinforcing the toe of North and Northwest berm of future sediment pond
Operational Objectives
8/26/2021
09 Aug 23-27, 2021
The following are the Objectives for the Operational Period of
August 23 to August 27, 2021:
Proceed with
construction of future sediment pond including preparation for placing outlet structure.
Prepare for culvert
and headwall installation at the Puzzle Mine Extension Shaft including diverting creek and digging footers.
Maintain the
temporary collection and diversion systems on Willard Adit 1.
Maintain
environmental, erosion, and safety best management practices.
Current Activities
8/26/2021
09 Aug 23-27, 2021
The following are the current activities being conducted for the
Operational Period of August 23 to August 27, 2021:
Diverted
water from creek and began shaping channel adjacent to the Puzzle
Mine Extension Shaft.
Prepared for culvert and
headwall installation at Puzzle Mine Extension Shaft.
Completed final
grading of the future sediment pond.
Prepared for liner
installation at sediment pond including painting outlet structure with
epoxy and installing discharge piping.
Maintained the
temporary collection and diversion system on Willard Adit 1.
Maintained
environmental, erosion, and safety best management practices.
Planned Activities
8/26/2021
09 Aug 23-27, 2021
For the next Operational Period, August 30 through September 3,
2021, the removal team will be continuing with the following activities:
Pour concrete
headwalls at the Puzzle Mine Extension Shaft.
Continue preparing
for liner installation at the future sediment pond, including piping and
outfall installation.
Maintain the temporary
collection and diversion system on Willard Adit 1.
Operational Period Objectives
9/2/2021
10 Aug 30 - Sept 3
The
following are the Objectives for the Operational Period of August 30 to September
3, 2021:
Pour concrete headwalls and set
piping in the channel adjacent to the Puzzle Mine Extension Shaft.
Continue preparing for liner
installation at the future sediment pond.
Maintain the temporary collection
and diversion system on Willard Adit 1.
Maintain environmental, erosion, and safety best management practices.
Current Activities
9/2/2021
10 Aug 30 - Sept 3
The
following are the current activities being conducted for the Operational Period
of August 30 to September 3, 2021:
Maintained water diversion from
creek adjacent to the Puzzle Mine Extension Shaft.
Set piping and junction box in
channel adjacent to the Puzzle Mine Extension Shaft.
Set and poured concrete headwalls
in channel adjacent to the Puzzle Mine Extension Shaft.
Prepared for liner installation at
sediment pond including outlet structure and piping installation and spill
way construction.
Stockpiled clean fill for Willard
waste rock pile cap.
Maintained
the temporary collection and diversion system on Willard Adit 1.
Maintained
environmental, erosion, and safety best management practices.
Planned Activities
9/2/2021
10 Aug 30 - Sept 3
For the
next Operational Period, September 6 through September 10, 2021, the removal
team will be continuing with the following activities:
Fill and set piping in channel adjacent
to Puzzle Mine Extension Shaft.
Construct rip rap apron at bottom
of channel adjacent to Puzzle Mine Extension Shaft.
Remove waste rock from Puzzle Mine
Extension Shaft to Willard waste rock pile.
Complete berming and outlet box installation
at Willard Adit 2.
Install sediment pond liner and prepare for diversion piping installation
from Willard Adits 1 and 2 to pond.
Operational Objectives
9/15/2021
11 Sept 6 - Sept 10
The following are the Objectives for the Operational Period of September 6 to September 10, 2021:
• Complete the liner installation at the future sediment pond.
• Backfill the head wall area and re-divert water from the temporary collection and diversion system at the Puzzle Mine Extension shaft.
• Maintain the temporary collection and diversion system on Willard Adit 1.
• Maintain environmental, erosion, and safety best management practices.
Current Activities
9/15/2021
11 Sept 6 - Sept 10
The following are the current activities being conducted for the Operational Period of September 6 to September 10, 2021:
• Fill and set piping in channel adjacent to Puzzle Mine Extension Shaft.
• Complete the liner installation at the future sediment pond.
• Complete the installation of diversion piping into the future sediment pond.
• Maintained environmental, erosion, and safety best management practices.
Planned Activities
9/15/2021
11 Sept 6 - Sept 10
For the next Operational Period, September 13 through September 17, 2021, the removal team will be continuing with the following activities:
• Backfill temporary channel used to divert water at the Puzzle Mine Extension Shaft.
• Backfill Illinois Gulch lined channel.
• Install sediment pond liner and prepare for diversion piping installation from Willard Adits 1 and 2 to pond.
Operational Objectives
9/17/2021
12 Sept 13 - Sept 17
The
following are the Objectives for the Operational Period of September 13 to September
17, 2021:
Install vegetation and landscape screen surrounding the sediment pond.
Begin installing drainage piping from Willard Adit 2.
Maintain the temporary collection and diversion system on Willard Adit 1.
Finish excavation of Puzzle Mine shaft.
Maintain environmental, erosion, and safety best management practices.
Current Activities
9/17/2021
12 Sept 13 - Sept 17
The following are the
current activities being conducted for the Operational Period of September 13
to September 17, 2021:
Began installing vegetation and landscape screen surrounding the sediment pond.
Installed drainage piping from Willard #2 Adit to the sediment pond.
Finished excavation of Puzzle Mine shaft.
Finished backfilling Illinois Gulch lined channel.
Maintained environmental, erosion, and safety best management practices.
Planned Activities
9/17/2021
12 Sept 13 - Sept 17
For the
next Operational Period, September 20 through September 24, 2021, the removal
team will be continuing with the following activities:
Prepare
concrete to plug Puzzle Mine shaft.
Continue
installing drainage pipe from Willard #2 Adit to the sediment pond.
Finish
installation of vegetation and landscape screen surrounding the sediment
pond.
Operational Objectives
9/24/2021
13 Sept 20 - Sept 24
The following are the Objectives for the Operational Period of September 20 to September 24, 2021:
• Continue installing drainage pipe from Willard #2 Adit to the sediment pond.
• Begin preparation to install a fence that will surround the sediment pond.
• Finish plugging Puzzle Mine shaft and add topsoil to the surrounding area of the shaft.
• Add topsoil to the surrounding area of sediment pond.
• Maintain environmental, erosion, and safety best management practices.
Current Activities
9/24/2021
13 Sept 20 - Sept 24
The
following are the current activities being conducted for the Operational Period
of September 20 to September 24, 2021:
Continued installation of drainage pipe from Willard #2 Adit.
Added topsoil to the surrounding area of the sediment pond.
Finished plugging Puzzle Mine shaft and added topsoil to the surrounding area.
Drilled holes within soil for fence post installation surrounding sediment pond.
Maintained environmental, erosion, and safety best management practices.
Planned Activities
9/24/2021
13 Sept 20 - Sept 24
For the
next Operational Period, September 27 through October 1, 2021, the removal team
will be continuing with the following activities:
Create drainage channel between Willard #1 Adit and sediment pond.
Spread temporary vegetation seeding on topsoil surrounding the sediment pond.
Begin installation of fence surrounding the sediment pond.
Install road base for the parking lot and access road near the sediment pond.
Operational Objectives
10/1/2021
14 Sept 27 - Oct 01
The
following are the Objectives for the Operational Period of September 27 to October
1, 2021:
Complete installation of fencing that will surround the sediment pond.
Finish installation of the drainage pipe from the Willard #2 Adit to the sediment pond.
Create drainage channel between Willard #1 Adit and sediment pond.
Maintain environmental, erosion, and safety best management practices.
Current Activities
10/1/2021
14 Sept 27 - Oct 01
The
following are the current activities being conducted for the Operational Period
of September 27 to October 1, 2021:
Finished installation of drainage pipe from Willard #2 Adit.
Created drainage channel between Willard #1 Adit and sediment pond.
Installed fencing surrounding sediment pond.
Maintained environmental, erosion, and safety best management practices.
Planned Activities
10/1/2021
14 Sept 27 - Oct 01
For the
next Operational Period, October 4 through October 8, 2021, the removal team
will be continuing with the following activities:
Spread hydroseed on topsoil surrounding the sediment pond and at the Puzzle Mine shaft.
Complete final grading of access road near the access road entrance.
Install road base for the parking area and access road near the sediment pond.
Operational Objectives
10/8/2021
15 Oct 04 - Oct 08
The
following are the Objectives for the Operational Period of October 4 to October
8, 2021:
Spread hydroseed on topsoil surrounding the sediment pond and at the Puzzle Mine shaft.
Complete final grading of access road near the access road entrance.
Install road base for the parking area and access road near the sediment pond.
Maintain environmental, erosion, and safety best management practices.
Current Activities
10/8/2021
15 Oct 04 - Oct 08
The
following are the current activities being conducted for the Operational Period
of October 4 to October 8, 2021:
Hydroseed has been spread on the topsoil surrounding the sediment pond, access road, and at the Puzzle Mine shaft.
Completed final grading of access road near the access road entrance.
Installed road base for the parking area and access road near the sediment pond.
Demobilizing crew and equipment from the Site.
Planned Activities
10/8/2021
15 Oct 04 - Oct 08
For the
next Operational Period, October 9, 2021 to October 29, 2021, the removal team
will be continuing with the following activities:
Install a closure gate at the access road entrance.
Install catwalks at the sediment pond.
Complete demobilization of equipment from the Site.
Operational Objective
11/1/2021
16 Oct 9 - Oct 29
The
following are the Objectives for the Operational Period of October 9, 2021 to
October 29, 2021:
Install outlet structure stop logs and catwalk at the sediment pond.
Install flume at the sediment pond outfall.
Install a closure gate at the access road entrance.
Complete demobilization of equipment from the Site.
Current Activities
11/1/2021
16 Oct 9 - Oct 29
The
following are the current activities being conducted for the Operational Period
of October 9 to October 29, 2021:
Completed installation of stop logs on the outlet structure and catwalk at the sediment pond.
Completed installation of flume on sediment pond outfall.
Due to shipping delays,
the closure gate will be installed during the next Operational Period.
Planned Activities
11/1/2021
16 Oct 9 - Oct 29
For the
next Operational Period, October 30, 2021 to November 8, 2021, the removal team
will be continuing with the following activities:
Install a closure gate at the access road entrance.
Complete demobilization of equipment from the Site.
Operational Objective
11/10/2021
17 Oct 30 - Nov 8
The
following are the Objectives for the Operational Period of October 30, 2021 to November
8, 2021:
Complete sealing of stop log brackets to the outlet structure.
Install a closure gate at the access road entrance.
Complete the demobilization of equipment from the Site.
Current Activities
11/10/2021
17 Oct 30 - Nov 8
The
following are the current activities being conducted for the October 30, 2021
to November 8, 2021:
Completed the sealing of stop log brackets to the outlet structure.
Installed a closure gate at the access road entrance.
Completed the demobilization of equipment from the Site.
Planned Activities
11/10/2021
17 Oct 30 - Nov 8
Work is completed for the
season at the Illinois Gulch Site. Monitoring and maintenance activities and
development of a water treatment plan will begin in Spring of 2022.