_REVISION - M1973021 ‎(3)‎

• Permit No: M1973021
• IBM Index Class Name: Revision
• Doc Name Note: AM07 Final
• Doc Name: Adequacy Review Response #3
• From: Aggregate Industries
• To: DRMS
• Type & Sequence: AM7
• Media Type: D
• Archive: No

Aggregate Industries, Morrison Quarry
Amendment No. 7 to Permit M-1973-021
Morrison, CO

October 2021 | 27
Exhibit E – Reclamation Plan
Existing and planned reclamation is described below. See Exhibit F – Reclamation Plan Maps
for reclamation plan maps for Morrison Quarry.
Existing Reclamation
Reclamation is the process of initiating and accelerating the natural trend toward recovery of
disturbed land areas. Current land use near Morrison Quarry consists primarily of open space,
ranching, and wildlife use. The operator has substantially completed sustained reclamation of
portions of the North and Central Quarry areas for wildlife habitat, which was the primary
undisturbed land use prior to mining activities. This experience has helped to refine the site
reclamation process and develop a landscape that is adaptable to natural land use and local
climatological factors.
Total reclamation within the Permit Boundary completed to date totals 54.4 acres.
North Quarry
Mining in the North Quarry was completed as of December 2007. The Town of Morrison and
Aggregate Industries, Inc. are currently using the North Quarry as a raw water storage reservoir
that has an estimated storage capacity of 1,641 acre-feet. Reclamation completed within the
North Quarry consists of highwall staining, topsoil placement, and bench revegetation. The
North Quarry reclamation totals 39.2 acres. Detailed plans providing construction and
geotechnical information regarding the placement of fill and construction/extension of drainage
conveyance and permanent Reservoir Site II can be found in AM04 and AM05 of the mine
permit. The final design for the fill slope of the southwestern corner of the North Quarry was
conditionally approved March 3, 1999, under Technical Revision #2. Refer to Section III of
Technical Revision #2 for plans regarding earthwork construction. Appendix A of Technical
Revision #2 provides a Slope Stability Analysis. Exhibit F.1 shows reclamation completed within
the North Quarry.
Central Quarry
In 2016, partial reclamation was completed within the Central Quarry when the southwestern
corner was backfilled to an elevation even with the surrounding unmined elevation (El. 6,500) to
support stockpiling activities. Prior to this, mined benches above El. 6,675 on the western
highwall of the Central Quarry were reclaimed by filling in the benches with overburden and
topsoil material (8.71 acres). Central Quarry reclamation completed to date, not including the
southwestern corner to El. 6,500, totals 10.3 acres. Exhibit F.2 shows reclamation within the
Central Quarry.
A former water storage reservoir known as Reservoir Site I was planned for the Central Quarry.
However, after mining activities were completed in this area, the reclamation plan was updated,
and a reservoir was no longer pursued. Reservoir Site I has been backfilled to El. 6,500 as part
of the Central Quarry reclamation.