Jumbo Mine

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Onsite Daily Operations Log & Site Update for October 18 to 25, 2017 10/31/2017 Site Update

1. Site Name

2. Operational Period

Onsite Daily Operations Log & Site Update

Jumbo Mine (A8K5)

October 18 to 25, 2017

3. Date/Daily Operations

10/18/2017:

  • Personnel at the site.
    • 7 ERRS
    • 1 OSC
  • Performed Site safety meeting.
  • ERRS set pumps and diverted adit water to north drainage to make adjustments to the channel.
  • ERRS removed 5 loads of debris from top of waste rock pile work area to complete debris removal.
  • ERRS started smoothed out area around cabin on top of waste rock pile.
  • Met with property owners and they were happy with the work that we have performed.
  • ERRS installed gate posts.

10/19/2017:

  • Personnel at the site.
    • 7 ERRS
    • 1 OSC
  • Performed Site safety meeting
  • ERRS installed liner below adit to transition water into the channel.
  • ERRS smoothed out parking lot area on waster rock pile and the road leading to it.
  • ERRS restored top of waste rock pile around cabin work area to its prior condition.
  • ERRS performed last site walkthrough and addressed any issues.
  • ERRS restored all staging areas to their prior condition.
  • ERRS installed gate onto posts and left open for USFS. USFS stated that they would install signage and lock gate next week when area is clear of campers.
  • Site work complete.

10/25/17:

  • Personnel at the site.
    • 1 START
    • 1 OSC
  • START documented site work and sampled the adit and out fall water at the lower culvert for total and dissolved metals.
  • Met with property owner and they were happy with the work that we have performed.


Onsite Daily Operations Log & Site Update for October 10 to 17, 2017 10/17/2017 Site Update

1. Site Name

2. Operational Period

Onsite Daily Operations Log & Site Update

Jumbo Mine (A8K5)

October 10 to 17, 2017

3. Date/Daily Operations

10/10/2017:

  • Mobilizing personnel to the site.
    • 5 ERRS
    • 1 START
    • 1 OSC
  • Performed Site safety meeting.
  • Performed site walk with overview of site operations to be performed.
  • Staged equipment and supplies at the site.
    • Mini-Ex and Skidster
    • 3 Trucks
  • START performed site documentation – photographed site.
  • START gather data for the viewer.
  • START performed preliminary channel size calculations and will provide design documentation.
  • ERRS cleared working area of wood/item and stacked them out of the way.
  • ERRS removed shed from back of cabin and saved doors and glass as owner requested.
  • ERRS prepped adit area for pump to divert water to north drainage.
  • ERRS ordered roll-off for trash.
  • OSC contacted property owner. Owner will be onsite 10/11/2017.

10/11/2017:

  • Personnel at the site.
    • 5 ERRS
    • 1 OSC
  • Performed Site safety meeting
  • Staged ERRS equipment trailer.
  • ERRS set pumps and diverted adit water to north drainage.
  • ERRS started work on upper channel below adit.
  • ERRS completed initial channel construction to below the waste rock pile, cut upper culvert channel, and started on toe collection channel and small settling pond at base of waste rock pile.
  • Met with property owner and his wife onsite. Discussed disposal of items and wood in work area. We will dispose on bath tub, drum, broken glass, and wood that is not useable for construction. We will stack firewood and dispose of rotten wood that is not good for burning. We will use our best judgement in these determinations.
  • ERRS received one load of lime stone at Montezuma road staging area.

10/12/2017:

  • Personnel at the site.
    • 5 ERRS
    • 1 OSC
  • Performed Site safety meeting
  • ERRS set pumps and diverted adit water to north drainage.
  • ERRS continued working on adit water channel.
  • ERRS removed 4 loads of debris from top of waste rock pile work area.
  • ERRS received loader, culverts, channel bedding fabric, and roll-off dumpster at the Montezuma road staging area.
  • ERRS moved the culverts from lower staging area to mine staging area with the loader.
  • ERRS finished digging channel to second culvert.
  • Met onsite with Summit County Open Space Director Brian Lorch. He had no suggestions and liked what we were doing.

 

10/13/2017:

  • Personnel at the site.
    • 5 ERRS
    • 1 OSC
  • Performed Site safety meeting
  • ERRS set pumps and diverted adit water to north drainage.
  • ERRS started preparing path of adit water channel, started to install liner at the adit working down the waste rock pile, and started placing limestone on liner.
  • ERRS trimmed trees on Jumbo Mine road to allow loader to proceed from the mine work areas with limestone.
  • ERRS started transferring limestone from the Montezuma road staging area to the mine staging area to the adit working area.
  • ERRS removed 3 loads of debris from top of waste rock pile work area. First of two roll-off dumpsters are full and should be switched out today.
  • Met onsite with USFS Paul Semmer and his colleague.
  • Additional limestone was delivered to the Montezuma road staging area.
  • Met onsite with Jeff Graves CDPHE CDRMS during the week. I do not recall specific day.

 

10/14/2017:

  • Personnel at the site.
    • 5 ERRS
    • 1 OSC
  • Performed Site safety meeting
  • ERRS set pumps and diverted adit water to north drainage.
  • ERRS continued preparing path of adit water channel, installing liner from the adit working down the waste rock pile, and continued placing limestone on liner.
  • ERRS transferred limestone from the Montezuma road staging area to the mine staging area and up to the waste rock pile water channel working area as needed

10/15/2017:

  • Personnel at the site.
    • 5 ERRS
  • Performed Site safety meeting
  • ERRS set pumps and diverted adit water to north drainage.
  • ERRS continued preparing path of adit water channel, installed liner from the adit working area down the waste rock pile through first culvert, installed first culvert, and continued placing limestone on liner.
  • ERRS collected cut tree limbs along the road that leads from the mine staging area to the adit working area.
  • ERRS transferred limestone from the Montezuma road staging area to the mine staging area and up to the waste rock pile water channel working area as needed.

 

10/16/2017:

  • Personnel at the site.
    • 8 ERRS
    • 1 OSC
  • Performed Site safety meeting
  • ERRS set pumps and diverted adit water to north drainage.
  • ERRS continued placing limestone on liner previous installed and finished installing all of the liner.
  • ERRS transferred limestone from the Montezuma road staging area to the mine staging area and up to the waste rock pile water channel working area as needed.
  • Full 20-yard roll-off was changed-out for an empty 30-yard roll-off.

 

10/17/2017:

  • Personnel at the site.
    • 8 ERRS
    • 1 OSC
  • Performed Site safety meeting.
  • ERRS set pumps and diverted adit water to north drainage.
  • ERRS finished placing limestone on the liner installed on the previous days and installed the last culvert.
  • ERRS transferred all of the limestone from the Montezuma road staging area to the mine staging area and restored the area to its prior condition.
  • Purchased gate to control site security. Worked with USFS and Summit County on gate type and placement.

 

4. Response Operations

Removal Objective 1: Construction of a membrane and lime stone lined channel from in front of the adit to the edge of the waste rock pile and back into the original water channel.

Planned Activities

  • Restore adit area to its prior condition and smooth out the area.
  • Restore mine staging area to its prior condition.
  • Place limestone in North drainage below toe of waste rock pile to address any acid mine drainage from waste rock pile.
  • Remove last of debris from top of waste rock pile work.
  • Restore waste rock pile work areas to drain into channel.
  • Performed last site walkthrough and addressed any issues.

Projected Project Completion: 10/19 or 20/2017.

 

 



Site Incident Briefing for Oct 10-17 2017 10/10/2017 Site Update

1. Site Name

2. Operational Period

Incident Briefing

Jumbo Mine (A8K5)

October 10 to 17, 2017

3. Site Description

 

The Jumbo Mine Site is located in the White River National Forest in central Colorado, approximately 8 miles east of Keystone just on the west side of the Continental Divide. The Site is approximately 200 yards above Peru Creek on a mountainside surrounded by evergreen trees. The Site is located on private land and consists of a relatively small set of mine works. There is a single adit with a collapsed portal that produces acid mine drainage. Adit water flow fluctuates during the year as the seasons change and may vary from 30 to over 100 gallons per minute. The mine drainage currently flows directly on top of a mine waste rock piles that are approximately 25,000 cubic yards in volume. There is a cabin atop the waste rock pile. The Peru Creek/Snake River confluence is about two miles downstream of the mine. The Snake River flows into the Dillon Reservoir approximately 10 miles downstream and is a major municipal drinking water source of the Denver metropolitan area.

 

The Jumbo Mine operated from 1915 to 1918 and produced 6,727.99mt of ore (USGS MROL). The mine produced gold, copper, lead, silver, and zinc. The Site was identified in the early 1990’s Abandoned Mine Lands Inventory report and again mentioned in the Munroe report in 1999. The Colorado Department of Public Health & Environment, Water Quality Control Division Snake River Watershed Plan (Plan) states that the Site provides a significant metal-contaminated point source which flows into Peru Creek then the Snake River. The Snake River is the primary eastern tributary to the Blue River in Summit County Colorado.

 

Peru Creek, the Snake River, and several of its other tributaries are on the Colorado 303(d) listing as streams that do not meet water-quality stream standards due to low pH and high concentration of four trace metals: dissolved cadmium, copper, lead and zinc. Much has been done to study the problems in the watershed, beginning at least in the early 1970s. Most of this work has focused in the tributary Peru Creek, which is home to the largest, longest serving mine in the watershed, the Pennsylvania Mine. The Pennsylvania Mine has been addressed by the EPA and we are now looking to address the Jumbo Mine Site which was identified in the Plan as a “Priority One” potential remediation-project site that is significantly degrading the water-quality in the watershed. 

4. Current Situation

 

This time-critical removal action involves the segregation of mine drainage away from waste rock piles to minimize both the generation of dissolved metals and erosion of waste rock material into Peru Creek and the Snake River watershed. This will be accomplished with the construction of a membrane and lime stone lined channel from in front of the adit to the edge of the waste rock pile and back into the original water channel. A membrane and lime stone lined channel will also be constructed along the base of the waste rock pile to collect leachate from the waste rock pile and then connected to the other channel.We will not be attempting to open the mine adit.

 

Conditions existing at the Site present a threat to public health and the environment and meet the criteria for initiating a removal action under 40 CFR 300.415(b)(2) of the National Contingency Plan (NCP).

 

 

 

5. Response Operations

 

Removal Objective 1: Construction of a membrane and lime stone lined channel from in front of the adit to the edge of the waste rock pile and back into the original water channel.

Current Activities

  1. Mobilizing personnel to the site.
  2. Working with contractor to stage equipment and supplies at the site.
  3. Preparing to start work.

    Planned Activities

  4. Safety and planning meeting.
  5. Clearing debris in Channel path at top of mine and start the channel excavation.

     

    Removal Objective 2: Construction of a membrane and lime stone lined channel along the base of the waste rock pile to collect leachate from the waste rock pile and then it will be connected to the other channel.

    Current Activities

  6. Mobilizing personnel to the site.
  7. Working with contractor to stage equipment and supplies at the site.
  8. Preparing to start work.

Planned Activities

  1. Proceed with channel construction when upper channel is completed.