APPCOR11105

• Permit No: C1981032
• IBM Index Class Name: Application Correspondence
• Doc Date: 12/22/1980
• Doc Name: SURFACE WATER HYDROLOGIC ASPECTS OF NORTHERN COAL CO REQUEST TO MINE BENEATH CURTIS CREEK
• From: MLR
• To: JIM HERRON
• Media Type: D
• Archive: No

DEPARTMENT OF NATURAL aESOU RCESt' ~nMM. r v ~ ^n' III IIIIII III IIII III
D. Monte Pascoe, Executive Director 999
M1NED LAND REl1LAMATION
423 Centennial Building, 1313 Sherman Street
Denver, Colorado 80203 Tel. [phone]
David C. Shelton
Director
December 22, 1980
TO: Jim Herron 1\ -~\
FROM: Jim Pendleton 1`~'~"J
RE: The Surfac Wate rologic Aspects of Northern Coal Company's
Request to Mine Beneath Curtis Creek
Jerry Zimpfer has requested that I forward comments regarding the surface
water hydrology of Curtis Creek to you. Pursuant to that request I offer
the following comments for your consideration.
Northern Coal Company's submittal of supplemental information regarding
their request to mine beneath Curtis Creek at the Rienau q2 coal mine
includes a statement of surface hydrological aspects. Their submittal
states that they are installing a Parshall flume and continuous recorder
upstream from the location of the proposed development mains. With the
completion of that flume and recorder installation they will be capable
of continuously monitoring both upstream and downstream from the proposed
location of the undermining of the Curtis Creek valley floor. Because
this monitoring of the surface water hydrology before mining commences
is necessary to determine the effect of the mining upon the surface water
hydrology of Curtis Creek, I recommend that roe condition the permission
to proceed beneath Curtis Creek upon the submittal of at least two weeks
of continuous surface water hydrologic monitoring from stations NRS
(upstream) and NRS-2 (downstream). Furthermore, it will be imperative
for the operator's technical personnel to closely monitor the surface
flows upstream and downstream from the development mains during the
advance of the mining face, in order to promptly determine any significant
effects upon surface flow within the creek. For this reason the operator
should be required to forward the continuous recorder records to our office
promptly (within 10 days) following their collection. With the addition
of these conditions the operator's proposed surface hydrology rronitoring
program will be acceptable.
/k