2001-04-25_GENERAL DOCUMENTS - C1984065

• Permit No: C1984065
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 4/25/2001
• Doc Name: PKA-1-1090
• From: DRMS
• To: New Castle Subsidence Reclamation Project Bidders
• Permit Index Doc Type: Reclamation Projects
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St.,Room 215
Denver,Colorado 80203 ADIVISION O F
Phone:[phone] MINE RAL S
FAX:[phone] &
GEOLOGY
DATE: A ri125 2001 R E C L A M A T I O N
P MINING•SAFETY
TO: New Castle Subsidence Reclamation Project Bidders Bill Owens
Governor
Gre E.Watcher
FROM: Steve Renner Executive Director
Michael B.Long
RE: Amendment No. 1 Division Director
Thank you for attending the pre-bid meeting on April 24, 2001. A revised Bid Scheduled and a
copy of the attendance list are attached. Please note the following clarifications and amendments
to the New Castle Subsidence Reclamation Project Documented Quote Bid:
1. The Sample Letter of Agreement between CONTRACTOR and Excel Energy (Public Service
Company of Colorado) was distributed at the Pre-Bid Meeting. If you did not receive a copy
of the Agreement, please contact me at [phone].
2. Project Dates: The Project is scheduled to begin on May 21, 2001, and end on May 31, 2001.
The time of completion is eleven (11) calendar days.
3. Task 2; Backfill Subsidence Feature: The following supercedes the Installation
Specifications contained in the Documented Quote dated April 3, 2001. (NOTE that the
other sections of Task 2; "General Description, Materials, Testing, Safety" have not been
changed.)
Installation Specifications
Backfill materials will be introduced into the feature in stages in order to construct the closure:
The first stage will involve introduction of fly ash grout into the vents located adjacent to the
west wall of the feature. Fly ash grout will be introduced into these vents to refusal. It is
estimated that fifteen cubic yards (15 yd3) of grout will be consumed in this first stage. Filling of
the vents to refusal will result in solidified fly ash grout being present at the top of the vents
within the feature.
The second stage of fly ash grout introduction will fill the depression which exists immediately
overlying the top of the vents within the feature, and adjacent to the west wall of the feature.
This depression measures eight feet (8')by fourteen feet (14')by four feet (4') in depth. The
estimated volume of fly ash grout to be introduced into the depression is seventeen cubic yards
(17 yd3)•