WYOMING OFFICE

5880 ENTERPRISE DR., STE. 200
CASPER, WY 82609

TEL: (307) 265-2373

FAX: (307) 265-2801

COLORADO OFFICE

10758 W. CENTENNIAL RD., STE. 200
LITTLETON, CO 80127

TEL: (866) 981-4588

FAX: (720)-981-5643

September 14, 2012

RECEIVED
Mr. John Russell
Bureau of Land Management

Rawlins Field Office see 20

PO Box 2407 B f Land Management
. ureay Oo!

Rawlins, WY 82301 Rawlins Field Office

Re: Comments Regarding the Final EIS for the Lost Creek Uranium Project
WYW-166318, 3809 (WTD03)

Dear Mr. Russell,

Please find below Lost Creek ISR, LLC’s (LCl) comments regarding the Final ElS for the Lost Creek Uranium
Project in Sweetwater County, Wyoming. The comments have been itemized for your convenience.

1. LCI, in comments provided to the BLM on the Draft EIS by letter dated June 6, 2012, expressed
concerns with additional stability water quality sampling requirements detailed in Section 4.7.1.
After reviewing LClI's comments, the BLM decided not to remove or revise the requirements. LCI
wishes to reiterate our concerns regarding this matter by furnishing the same comment, as set
forth in our June letter, as follows:

“Pg. 4.7.1, Sect 4.7-1, Para. 1. The DEIS states, “To provide additional monitoring data on
Stabilization (Section 4.7.1.1) for on-going reviews of regulatory requirements (EPA,
2011b), at least two additional stability monitoring samples would be collected, once every
three months over a six-month period, after the initial stability period.” LCI believes it is
inappropriate for the BLM to amend a sampling plan in a DEIS for the purpose of collecting
information for another regulatory agency (EPA) on the basis that such additional
information may be used to support a future rule making. If the EPA desires such
information, they should address this issue through the NRC, which utilizes EPA standards
to regulate in situ facilities, or they should promulgate regulations addressing their
concerns. The EIS process was neither intended nor designed to serve as a mechanism to
change regulations. Therefore, LC! respectfully requests that all language requiring the
collection of additional stability samples be removed from the EIS. LC! proposes to follow
the long-standing requirements of the WDEQ-LQD Division which are described in the Plan
of Operations. It is also noteworthy that the EPA has issued an aquifer exemption for the
mining zone at Lost Creek which, as far as EPA regulations mandate, does not require any
groundwater restoration or subsequent stability monitoring.

The same issue is brought up again on Pg. 4.7-7, Sect. 4.7.1.1 at the end of the second
paragraph and should be removed from the EIS.”

Lost Creek ISR, LLC is a wholly-owned subsidiary of Ur-Energy Inc
TSX: URE
www.ur-energy.com



2. Page 4.2-1, Section 4.2.1 states the Project will conform to the land use regulations of Carbon

County. Since the project is located wholly within Sweetwater County, we request that the
requirement to conform to Carbon County land use regulations be removed.

3. Page 4.3-1, Section 4.3.1.2 states in part “Maintenance costs for the county roads could accrue

to both Carbon and Sweetwater Counties.” All access to the project is on roads maintained by
the State of Wyoming, Sweetwater County, private entities or the BLM. No access roads are
maintained by Carbon County. Therefore, we request the reference to Carbon County in this
context be removed.

4. Page 4.7-30, Section 4.7.6.2 states the liner thickness will be 41 mm thick. The correct thickness

should be about 40 mil to be consistent with the text in the Plan of Operations and Permit to
Mine.

5. The BLM revised language in Section 4.18.4.3 dealing with the storage of solid 11(e)(2)
byproduct material in response to a comment from LCI. Unfortunately, the revision still requires
all material to be stored within super sacs and doesn’t address how bulk items that are too large
to fit in super sacs will be stored. The Nuclear Regulatory Commission (NRC) and the
Department of Transportation, which regulate the storage and shipping of such material, allows
for storage within a strong tight container within the restricted area. LCi requests that BLM
explicitly allow for storage of solid 11(e)(2) byproduct material within a super sac(s) in the
restricted area or within a strong tight container(s) within the restricted area in conformance with
NRC regulations.

6. Page F-38 of Appendix F states that changes were made to Table 3.8-3 to incorporate the results
of recent sage grouse counts. It appears the correct reference should be to Table 3.8-4.

Regards,

Lost Creek ISR, LLC
By its Manager, Ur-Energy.USA Inc.
/

Ce:

“N\
nh W. Cash, Vice President Exploration

Uy-Energy USA Inc.

Theresa Horne, Ur-Energy Littleton Office

Lost Creek ISR, LLC is a wholly-owned subsidiary of Ur-Energy: Inc
TSX: URE
www.ur-energy.com