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_GENERAL DOCUMENTS - C1981017 (210)
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_GENERAL DOCUMENTS - C1981017 (210)
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Last modified
11/2/2020 9:34:33 AM
Creation date
6/19/2012 2:57:02 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981017
IBM Index Class Name
GENERAL DOCUMENTS
Doc Name
Bid Documents (IMP) 2007 Correspondence
Permit Index Doc Type
General Correspondence
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
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contractor was hired to maintain the flume throughout the duration of the high flows to <br /> prevent the flume from failing. Roadside ditches and associated culverts were cleaned to <br /> pass flows expected during summer thundershowers. Other on site berms and ditches <br /> were maintained as necessary. <br /> Dutch Creek Flume Repair. The Dutch Creek Flume sustained severe damage during <br /> the spring runoff. Large holes were punched through the base of the concrete flume, <br /> causing water to infiltrate into the adjacent Old Refuse Pile. Repairs to the flume <br /> consisted of installing rebar and concrete to the floor of the flume, and reinforcement of <br /> the furthest down-stream foundation. <br /> Mine 3 Reclamation. Reclamation of the Mine 3 area impacted the mine entry area as <br /> well as the coal loadout, located approximately 500 feet vertically below the mine entries, <br /> and the conveyor corridor that connected these two areas and some Mine Bench <br /> Outslopes. Previous to the DRMS reclamation work, a structural demolition company <br /> employed by Mid Continent Resources sealed all mine entries, and removed all of the <br /> metallic debris from the area. All non-metallic structures, foundations and channels were <br /> left in-place for DRMS contractors to demolish and remove. <br /> Reclamation work consisted of structural demolition, backfilling and grading, drainage <br /> manipulation and revegetation work. Numerous remnant buildings, foundations and <br /> beltline foundations were left at the site. All concrete materials were demolished to <br /> below ground surface level. The rubble generated at the mine entry area was <br /> preferentially placed within the open portions of the mine entries, outby the seals. Excess <br /> concrete was placed against the highwall at the entry area, and against the cut slope at the <br /> loadout area. <br /> The highwall and the loadout cut slopes were backfilled with earthen materials generated <br /> on site. Additionally, a large depression located to the north of the mine entries was <br /> backfilled to ensure proper drainage of the backfilled mine bench area. Material from the <br /> north facing Mine Bench Outslope was excavated to generate fill material, as was the <br /> east-facing slope of the mine bench. The slopes above the loadout cut slope were <br /> reduced to generate fill for that area. <br /> The entire area was graded to establish appropriate surface water runoff characteristics. <br /> No topsoil was available to support revegetation efforts, so the in-place earthen materials <br /> were amended with straw mulch and fertilizer, which were cut into the dirt by dozer. The <br /> area was then revegetated using the U. S. Forest Service -approved seed mixture. An <br /> attempt to revegetate the steep slopes below the north facing side of the mine entries and <br /> the fill slopes located between the switchbacks of Road F was made. These areas were <br /> mechanically roughened. Seed and mulch were applied using a truck mounted hydro <br /> seeder. <br /> At the time that this work was completed, Mid Continent Resources owned the property <br /> at Mine 3. Subsequent to completion of the reclamation work, the property was acquired <br /> by the U.S. Forest Service. <br /> 4 <br />
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