REV14698

• Permit No: C1981033
• IBM Index Class Name: Revision
• Doc Date: 8/23/2006
• Doc Name: Structural Demolition Regarding Revised Cost Estimate Memo
• From: Susan Burgmaier
• To: Joe Dudash
• Type & Sequence: MR27
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF RECLAMATION, MINING AND SAEETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
DATE: August 23, 2006
TO: Joe Dudash
FROM: Susan Burgmaier
RE: BearNo. 3 Mine C-1981-033
Minor Revision No. 27
Structural Demolition
COLORADO
DIVISION OF
RECLAMATION
MINING
- &-
SAFETY
Bill Owens
Governor
Russell George
Executive Director
Ronald W. Cattany
Division Director
Natural Resource Trustee
Per your request, I have completed a revised cost estimate for the Bear No. 3 Mine. As
you, Sandy and I discussed, I revised the entire estimate for current costs as part of the
midterm review you are working on. The new reclamation liability amount is
$276,438.00, an increase of $ 116,968.00 (from the 1993 cost estimate). The reason for
the increase is as follows:
Tasks using a bulldozer (1, 3, 4, 6, 7, 7b, and 17) were revised for current
costs, which are $30.60 higher per operating hour than when the estimate was
last done. Also, the Division now uses a spoil pile correction factor,
consistent with estimating guidelines found in the Caterpillar Handbook. The
Division used a factor of 0.75, which represents final grading with a medium
to rough finish. Also, a D7R dozer was used (previous estimate assumed a
D8N) in consideration of the width of the bridge used to access to the site.
2. The reclamation costs for the water treatment pond (new Task 3) had not been
included in the Division's previous estimate. The new estimate includes
$1,239.00 for reclamation of the water treatment pond.
Reclamation costs for the sediment pond (Task b) are increased for the
reasons described in Item 1, above, as well as an increase in the estimated
embankment volume. The embankment volume is now based on field
measurements and calculations conducted by Jim Stark on August 9, 2006.
Details of his estimations are included in his inspection report for the site on
that date.
4. The estimate now includes a cost for ripping/scarifying topsoil in preparation
for seeding (Task 8). This is normally included in Division cost estimates, but
was inadvertently omitted from the previous estimate.
Office of Office of
Mined Land Reclamation Active and Inactive Mines