1996-08-02_REVISION - M1974052 ‎(7)‎

• Permit No: M1974052
• IBM Index Class Name: Revision
• Doc Date: 8/2/1996
• Doc Name: TR TR FOR PIT 1 PN M-74-052
• From: BRADFORD JANES
• To: DMG
• Type & Sequence: TR1
• Media Type: D
• Archive: No

'kCHNICAL REVI ON
this Technical Revision to function concurrently as the 1996 Annual
Report and benchmark for comparing changes to the property in
subsequent years, therefore, the information is not related
backwards to the previous year, but as a benchmark, sets forth the
foundation conditions at play over the site as a means to track
changes over subsequent years. The continued annual use of aerial
photography makes this change necessary and should be viewed as a
substantial improvement over previous years reports.
With the use of aerial photography, accuracy is well within the range
of accuracy (5-7 percent of area shown), while allowing for more
affordable means to generate very precise images and
measurements of activities occurring over the site over time (per
annum). The overall picture should aid in site management to better
secure and assure permit compliance while enhancing
communications between the two organizations.
This Revision provides a 10 year plan to fill the approximately 11.3
acre pond (Area Q in place at the site (a rate of apx. 1.2 acres/year),
and any additional acreage determined by the course of
determination of pre-law water for which any additional acreage of
backfill must occur to bring the site into balance without the need for
permanent augmentation. Additional backfilling would occur on the
larger (Area B) lake. Preparations on an Amendment are underway
to allow for the development of a lined pond instead of backfilling,
again, to preclude the need for permanent water augmentation
should backfilling of the ponds become impractical.
Until such an Amendment can be produced and approved, a
Temporary Plan of Augmentation will be submitted for approval
with the State Engineer's Office. A Backfill Notice has been
submitted in advance or tandem with this submittal to account for
the use of plant fines, concrete, and other acceptable inert fill for
purposes of backfilling the existing 11.3 acre fond and additional
acreages of water within Area B. Backfill costs are not included since
the pond is the default reclamation plan to be augmented for.
Excavation and processing has ceased over the entire Pit 1 Area,
with only the balance of Amendment 2 lands South of the St. Vrain
Varra Companies, Inc. - Pit 1 - DMG Permit M-74-052 2
TECHNICAL REVISION OF 08/01/96.