2012-06-20_PERMIT FILE - C2010089 ‎(84)‎

• Permit No: C2010089
• IBM Index Class Name: PERMIT FILE
• Doc Date: 6/20/2012
• Doc Name: BBA Water Consultant Report
• Section_Exhibit Name: Appendix 2.05.6‎(3)‎-1a
• Media Type: D
• Archive: No

BISHOP - BROGDEN ASSOCIATES, INC.
August 25, 2010
Murari P. Shrestha, P.E.
Director of Engineering and Contracts
Western Fuels Association
RE: Western Fuels — Nucla Area Mine Sites - Analysis of Impacts to Wells and Water
Rights and Potable Water Requirements and Consumptive Use
Dear Murari:
ttiL BBA
water consultants
This letter report presents a summary of the projected impacts to wells and water rights
resulting from the operation of potable water supply wells and dewatering of mine areas
associated with Western Fuels Colorado (Western Fuels) New Horizon, New Horizon
North and Cyprus Block Mines, generally located near the Town of Nucla, Colorado, as
presented in the attached Figure 1. This effort was performed to support Western Fuels'
engineering analyses related to the water rights augmentation plan completed by Wayne
Schieldt of Water Resource Solutions, LLC. The analyses address potential impacts to
neighboring water supply wells resulting from potable well and dewatering pumping and
the lagged stream depletions resulting from the operation of the mines and wells. In
addition, this letter report presents a summary of the potable water requirements and
consumptive use at the existing mine site and projected potable water use and
consumption at the future mine facilities. The work benefitted from information in our
files, information provided by Western Fuels, available geologic and topographic
mapping, information available from the State Engineer's Office and records from the
Town of Nucla.
Potable Water Demand and Consumptive Use
Potable water for the existing New Horizon Mine facilities is supplied by a potable tap
from the Town of Nucla. Potable taps will not be available at the New Horizon North and
Cyrpus Block locations, and as a result, potable water supply wells will be developed at
those two mine sites. We understand that potable water is used for sanitary purposes in
the office facilities, limited irrigation adjacent to the office facilities and limited washing
of vehicles and equipment. In order to estimate the potable water requirements and
consumptive use at those two locations, we researched and reviewed potable water use
records for the existing mine facility. We contacted the Town of Nucla and were
provided water use records for March, 2005 through February, 2010. We assumed that
Michael A. Sayler
Christopher J. Sanchez
Jeffrey A. Clark
Charles E. Stanzione
Ray Dunn
Daniel 0. Niemela
Laurel E. Stadjuhar
333 West Hampden :Avenue, Suite 1050 Englewood, Colorado 80110 phone [phone] fax [phone]