_GENERAL DOCUMENTS - C1981017 ‎(247)‎

• Permit No: C1981017
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Name: Bid Documents ‎(IMP)‎ 1996 Correspondence
• Permit Index Doc Type: General Correspondence
• Media Type: D
• Archive: No

Significant erosion of the various slope gullies was not observed
in 1996. The use of berms on the south east side of the bench was
not as successful. A breach in the berm developed, leading to a
concentrated flow of water down Road C, and eventually over the
side of the hill, causing damage to one of the 1996 experimental
revegetation plots. Using retainment furrows, when possible,
appears to be more advantageous than using berms, due to the
decreased risk of breaching. Proximity of metamorphosed sandstone
to the surface may limit the ability to create furrows, however.
Revegetation of the backfill and mine bench were successful. The
grass and forb mixture appears to be establishing itself, while few
weed species were observed. This area was planted later in the
fall than Mine 3 , when intermittent snows were becoming prevalent.
Perhaps this has helped lead to the seemingly successful
establishment of vegetation.
The hydroseed applied to the upper 300 feet of the north outslope
does not appear to have been successful. Little evidence of
increased vegetative cover has been observed in this area.
The final noteworthy event of the pre-construction season occurred
on the afternoon of July 18. An intense thunder storm provided
substantial rain fall throughout the upper Crystal River Basin,
including Coal Basin. Numerous landslides and mudflows were
apparent throughout the Crystal River drainage following the event.
The rain and ensuing runoff caused the failure of the liner
installed at Sutey Pile Ditch 1, and created an overtop at the
confluence of Ditches 1 and 8. Other ditches on the Sutey Pile
were also overtopped, causing breaches and minor erosion below.
Many of the road culverts along Roads C and D were overtopped,
causing water to cascade down the roads as a result. Numerous
small slides occurred along Roads A, D and G. A small debris flow
was observed and photographed on a small tributary to Dutch Creek
near Road D. A substantial volume of highly sediment laden runoff
was generated from the upper (B) coal stockpile location. The
runoff was photographed and will serve as a good baseline indicator
of pre-reclamation water quality impacts.
1996 RECLAMATION CONSTRUCTION PROJECTS
Four reclamation construction projects were completed in 1996; the
Rock Tunnel, Rock Tunnel Waste Dump, Mines 1 and 2 and Roads E, F,
G Projects. Approximately 88 acres were reclaimed during the
performance of these projects (Table 1) . The reclamation bids were
structured to coincide with the approved reclamation plan where the
plan addresses specific reclamation tasks. Sufficient detail to
formulate reclamation bids is generally not contained within the
permit, however, cross sections contained in the permit were used
as the basis for backfilling and grading plans at Mines 1 and 2 and
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