GENERAL36150

• Permit No: C1980001
• IBM Index Class Name: General Documents
• Doc Date: 6/1/1993
• Doc Name: 1993 Erosion Inventory Report
• From: PITTSBURG & MIDWAY COAL MINING CO
• To: DMG
• Media Type: D
• Archive: No

. EDNA MINE - 1993 EROSION INVENTORY REPORT
OVERVIEW
Section 4.3 of Permit No. C-80-001 requires an annual erosion
inventory of the Edna Mine's permanently reclaimed lands that
remain under bond. The permit requires that an inventory report be
submitted to the CDMG on or before April 30th of each year. With
your verbal permission, this report is being submitted prior to May
30, 1993. The first erosion inventory report of this process was
done in the spring of 1992 since approval of the permit section
containing this language was not granted until after snowfall in
1992. Since this second survey was conducted fairly soon after the
first (Fall of 1992) little change was noticed in the reference
areas. Two areas not previously detailed were added to the
inventory. Block 1 of the Moffat Area reclaimed area is a live
handled topsoil area that will not receive a reclamation seed mix
in order to test the effectiveness of live handling roto-cleared
topsoil in re-establishing native plant species. This block is the
eastern most topsoiled area in the reclaimed Moffat Area. Block 2
of the Moffat Area reclaim is the second new area detailed. This
block is also live handled roto-cleared topsoil, but will be seeded
as discussed in the current permit document. This block lies
between the middle and lower haul roads accessing the Moffat pits.
Areas permanently reclaimed that are required to be inventoried
under the plan include the reclaimed areas to date at the southern
end of the Moffat Area, an approximately 10 acre strip in the South
of Shop Area and areas permanently reclaimed on West Ridge. The
west Ridge areas are currently exempt from inventory requirements
pending construction of runoff control structures required by the
West Ridge Hydrologic Reconstruction Plan. Three sections in the
West Ridge Area were voluntarily evaluated, and are included in
this report for future evaluation of the effectiveness of the West
Ridge Hydrologic Plan's success. Results of the inventory are
described below. The inventoried areas are referenced to Exhibit
1 of the 1992 report.
INVENTORY METHODS
Pedestrian and vehicular surveys of permanently reclaimed areas
were conducted to inventory erosion features. Individual features
and entire sites were evaluated as outlined in Section 4.3. The
existing condition of the single concentrated flow feature,
identified in the 1992 report in the South of Shop Area, was
documented using method (1) ("Cross-Section Survey") outlined in
Permit No. C-80-001 on page 4.3-19. This part of the survey was
conducted in May of 1993 because early snowfall toward the end of
the overall survey, conducted in the fall, prohibited access to the
area without causing damage to vegetation. This method was chosen
5/22/93 DLB