2008-03-27_REVISION - M1984041

• Permit No: M1984041
• IBM Index Class Name: REVISION
• Doc Date: 3/27/2008
• Doc Name: Text amendment to MLRB for composting facility for town of Gypsum
• From: Zancanella & Associates, Inc.
• To: DRMS
• Email Name: THM
• Media Type: D
• Archive: No

P.O. Box 1908 ~ ~ ~ [phone]
1011 Grand Avenue ~ [phone] Fax
Glenwood Springs, Z/.1NC/aNELL/.! aNl~ /~550CIaTES, INC.
CO 81602
ENGINEERING CONSULTANTS
March 25, 2008
R~~
Travis Marshall MAR 2 7 20118
Division of Reclamation, Mining and Safety
GRAND JUtdCTi~N F@E!D OFFECE
Grand Junction Field Office Dw1StoNOF
101 South Third Street, Room 301 RECLAMATION' M~i~lftf{i ~ w
Grand Junction, CO 81501
RE: Text Amendment to MLRB Permit Number M1984041 ~~~~~~~®
for Composting Facility for Town of Gypsum
APR 0 9 2008
Dear Mr. Marshall: Division of Reclamation,
Mining and Safety
This letter is a description of the proposed amendment to the existing American
Gypsum Company LLC, Eagle-Gypsum Mine, Permit Number: M1984041. This
amendment would allow composting of biosolids on the mine property.
The Town of Gypsum would like to establish a new site for its biosolids composting
facility. They have reached an agreement with American Gypsum Company to lease a
3.2 acre tract at the mine site approximately one mile north of Gypsum to be used for
the facility (See attached map, Figure 1). The tract is in a part of the mine property that
has been mined, but has not yet been fully regraded or revegetated. The lease
agreement has a primary term of ten years with the option to renew at the end of the
primary term. In exchange for allowing Gypsum to lease the property, the mine would
benefit by being able to use the compost for the mine's revegetation projects.
The mine property would provide a "good fit" for the facility with regard to the zoning, the
relatively short distance from the WWTP and the lack of existing residences near the
proposed composting site.
The operation would haul treated biosolids from the town's wastewater treatment plant
to the composting facility using an end dump truck. At the proposed facility the biosolids
would be mixed with wood chips and would receive further treatment to convert the
material to Class A compost. A preliminary diagram of the proposed operation is shown
on Figure 2.
The composting is accomp{ished using a three step process:
1. The biosolids are mixed with wood chips.
2. The mixture is then placed an a ~iad in windrows where final stabilization occurs.
The windrows are periodically turned to provide tl~ae necessary exposure to air.