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

•
' Background
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SNOWMASS COAL COMPANY
Weir Program
Page 1
RECEIVED
QCT 131983
MINED IANb RECUMATION D141SION
Cola Dept of Nriurat Resource
During Snowmass Coal Company's permit review with the Colorado Mined
' Land Reclamation Division, it was agreed that some type of flow measuring
device was necessary on North and Middle Thompson Creeks. In March of
' 1983, Snowmass Coal decided to build a weir on North Thompson Creek, before
the spring runoff started, in order to get some idea of the cost of const-
ruction problems that would be encountered. Personnel from the Colorado
Mined Land Reclamation Division approved of the idea and gave Snowmass
' permission to construct the weir. However, it was learned that Snowmass
might have to apply for a 404 permit from the Army Corp of Engineers before
any construction could take place.
' In a letter dated March 14, 1983, Snowmass requested the Army Corp of
Engineers to review the basic plan and decide if a permit was required. On
March 29, 1983, Snowmass Coal was informed that a 404 permit from the Corp
' of Engineers was needed. Snowmass then cancelled its plans to construct
the weir before the spring runoff started and began putting a permit applica-
tion together.
'
Asa requirement for permit approval from the Corp of Engineers, Snowmass
Coal Company was requested to contact the Division of Wildlife in order to
t • determine if fish ladders were required on the weirs. The correspondence
between the DOW is included with this re
ort
.
p
On May ]7, 1983, a complete 404 permit application was sent to the Army
' Corp of Engineers, in addition, a permit application was also sent to the
Colorado Department of Health, Water Quality Control Division. Both of
these documents are included at the end of this report.
On June 16, 1983, a Public Notice was sent out by the Corp of Engineers;
however, under the heading of "purpose" the Corp of Engineers erroneously
stated that the purpose of the weirs was to divert water for use in Snowmass'
Coal Mines. Snowmass Coal Company then contacted the Corp of Engineers and
corrected their mistake. Anew Public Notice was published and the public
comment period was extended to July 29, 1983.
1
On September 16, 1983, Snowmass was issued a 404 permit from the Corp
of Engineers and the State Water Quality Control Division to construct the
' weirs. These permits are also included at the end of this report.
Weir Information
' Three drawings located with the 404 permit application show the const-
ruction details of the weirs. Each weir will have fish ladders as shown.
Snowmass proposes to use Leupold & Stevens mechanical recorders to contin-
' uosly monitor the flow through each weir. These recorders will be located
in an instrument box as shown on the weir drawings. Each recorder will be
. checked once a week to insure that the recorder is operating properly and
' accurately recording the flow of water through the weirs.
All of the recorded data will be included in Snowmass Coal Company's
annual hydrology report as outlined in our permit application.