2008-03-27_REVISION - M2005050

• Permit No: M2005050
• IBM Index Class Name: REVISION
• Doc Date: 3/27/2008
• Doc Name: TR-01 Review
• From: DRMS
• To: Bluerock Energy Corporation
• Type & Sequence: TR1
• Email Name: GRM
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215 C O L O R A D O
Denver, Colorado 80203 DIVISION o F
RECLAMATION
Phone: [phone] M I N I N G
FAX: [phone] -&-
SAFETY

Bill Ritter, Jr.
DATE: March 25, 2008 Governor
Harris D. Sherman
Executive Director
TO: Russ Means Ronald W. Cattany
Division Director
FROM: Allen Sorenson Natural Resource Trustee
RE: Storm Water Management Plan, Bluerock Energy Corp., J Bird Mine,
Technical Revision TR-O1, Permit No. M-2005-050
The Division of Reclamation, Mining, and Safety engineering staff have reviewed the above referenced
plan, and have identified the following issues to be addressed.
1. The sizing for the storm water containment basin is only legitimate if water bars are effective in
preventing any contributions of runoff from areas upgradient of the bars during the design event.
There is no analysis or demonstration of this in the plan.
2. The plan states that water collected by the storm water containment basin will be retained and
evaporated over time. The Colorado State Engineer requires that water detained out of priority in
structures such as the storm water containment basin be released within 72 hours. The Operator
must explain how their planned use of the basin can be reconciled with the State Engineer's
requirement.
3. The storm water containment basin will be lined with clay, which the plan states will prevent
infiltration. Without a clay specification and installation quality assurance plan, the clay cannot be
relied upon to prevent infiltration. The Operator may either provide such a specification and plan, or
may provide a demonstration that a high quality infiltration barrier is not necessary to protect ground
water and nearby surface water.
4. There are no outlet works proposed for the storm water containment basin; if an event larger than the
design event were to occur, the upgradient bars and berms are likely to fail causing rapid
overtopping of the basin. The Operator must provide a plan for outlet works that will safely pass the
100-year return period event with the highest peak flow, or a demonstration the overtopping of the
basin during the 100-year event will not create adverse off site impacts.
cc: Carl Mount, DRMS (via email)
Office of
Office of Active and Inactive Mines
Mined Land Reclamation Denver Grand Junction Durango