HYDRO30985

• Permit No: C1981025
• IBM Index Class Name: Hydrology
• Doc Date: 10/13/1983
• Doc Name: WEIR PROGRAM
• Permit Index Doc Type: CORRESPONDENCE
• Media Type: D
• Archive: No

~ ~~..~ Public Noti IVED
• US Army Corps ~~/
of Engineers
' ~~~ ~~ Public Notice No. 8270 Date: June 16, 1983 JUN o 1 ]983
650 Capi4tl A4ell
Seaemerroo. CA 96814 M Reply Refer to: SPKCO-O Commertts Due by: July 18, 19~3GOA~ GO.
~ >;NOw-en

TO WHOM IT MAY CONCERN: '
' Subject: Application for Department of the Army Permit to place dredged and fill material in the North
and Middle Thompson Creek to construct concrete weirs, as shown on the attached drawings.
' Applicant: Snowmass Coal Company, P.O. Box 980, Carbondale, Colorado 81623.
Location: Project is located 12 miles southwest of Carbondale, in Pitkin County, Colorado, and within
Section 34, Township 8 South, Range 89 West.
' Purpose: Purpose of the project is to construct 4 concrete weirs, 2 on North Thompson Creek and 2 on
Middle Thompson Creek to divert water for use in Snowmass Coal's mines.
Project Description: The application is (or the placement of 120 rubic yardsof dredged alluvial material
' and 46 cubic yardsof concrete for permanent fill to construct four (4) weirs. Approximately 30 cubicyards
of riverbed material will be dredged perpendicular to the stream flow at each weir location. The material
will be placed laterally in the center of the streams to divert flows into one-half of the channel. One-half of
' the rectangular shaped weir will be constructed on the dry side. The creek will then be diverted to the
finished side and the weir completed. The dredged material will then be spread evenly along the stream
bottom. The project is proposed to start when the creeks reach base flow conditions.
Each weir will contain approximately 11.5 cubic yardsof concrete. The weirs will have fish ladders on the
' • lower side to facilitate fish migration in the creeks. Approximately 0.01 acres of wetlands will be impacted
by each weir for a total of 0.04 acres. At the end of the mines useful life, all the weirs will be removed in their
entirety.
' Additionallnformation: The applicant has applied to the Colorado Department of Health Water Quality
Division, for certification of the project. The applicant states that the mine is operating under a permit from
the Colorado Mined Land Reclamation Division.
' The latest published version o(the National Register of Historic Places and its monthly supplements have
been reviewed and thereare noplaceseither listed or recommended aseligiblewhich would beaffected.
Presently unknown cultural resources maybe located in the permit area. This activitywould not affect any
' threatened or endangered species or their critical habitat. The District Engineer has made this
determination based on information provided by the applicant and on the Corps' preliminary evaluation.
Interested parties are invited to submit written comments on or before July 18, 1983. Any person may
' request, in writing, within the comment period specified in this notice that a public hearing be held to
consider this application. Requests for public hearings shall state, with particularity, the reasons for
holding a public hearing.
' A permit issued by the Department of the Army does not give any property rights either in real estate or
material or any exclusive privileges and does not authorize any injury of private property or invasion of
private rights, or any infringement of Federal, State or local laws or regulations, nor does it obviate the
' necessity of obtaining State or local assent to the work authorized.
The decision whether to issue a permit will be based on an evaluation of the impact of this activity on the
public interest underauthorityof5edion 404of the Clean WaterACt (33 USC 1344). Evaluation will include
application of guidelinessetforthbyAdministrator,EPA,underauthorityoftheAct(40CFRPart230).That
decision will reflect the national concern for both protection and utilization of important resources. The
• benefit which reasonably may be expected to accrue from the proposal must be balanced against its
reasonably foreseeable detriments. All factors which may be relevant to the proposal will be considered;
' among those are conservation, economics, aesthetics, general environmental concerns, historic values,
fish and wildlife values, flood damage prevention, land use, navigation, recreation, water supply, water
I