2010-03-22_REPORT - C1994082 ‎(2)‎

• Permit No: C1994082
• IBM Index Class Name: REPORT
• Doc Date: 3/22/2010
• Doc Name: 2009 Annual Hydrology Report
• From: Seneca Coal Company
• To: DRMS
• Annual Report Year: 2009
• Permit Index Doc Type: Hydrology Report
• Email Name: DTM
• Media Type: D
• Archive: No

TABLE 9
Summary of Surface Water Monitoring Sites, Yoast Mine
Site Location and Period of
Number Elevation Operation
Comments
YSSF1 Middle Sage Creek
7216 feet 01/81-10/83 2.5 ft. wide (2.0 ft. deep) Parshall flume w/continuous

(5N87W18CDD) recorder, monitors downstream of Yoast Mine. Data for this
for this site contained in USGS Open-File Report 90-708.
Discontinued 10/83, flume relocated to Site YSSF3 (see
above) summer 1990. Replaced by Site YSS2 (see below) in
5/91
YSSF2 Y1 Pond, Tributary to Sage Creek
7258 feet 03/91-10/99 1.0 ft. wide (1.5 ft. deep) Parshall flume w/continuous

(5N87W19BAA) flow recorder, monitors discharge of Yl Pond (renamed to
NPDESI2 11/99).
YSSF3 Upper Sage Creek
7409 feet 09/90-present 2.5 ft. wide (2.0 ft. deep) Parshall flume w/continuous flow
(5N87W30BBA) recorder, monitors upstream of Yoast Mine
WSSF3 Lower Sage Creek
6857 feet 09/90-present 3.0 ft. wide (2.5 ft. deep) Parshall flume w/continuous

(5N88W11ACC) flow recorder, monitors downstream of both Yoast and
Seneca II-W Mines (not now required for Yoast monitoring)
YSS2 Middle Sage Creek

7218 feet 05/91-present
No instrumentation, replaces Site YSSF1 (see above),

(5N87WiBCDD) located approx. 150 ft. upstream of Site YSSF1 due to
beaver dams
YSS3 Y1 Draw, Tributary to Sage Creek
7265 feet 05/91-10/93 No instrumentation, monitors inflow to Y1 Pond

(5N87W19ABB) 5/98-10/98

Discontinued 11/1999.
YSA4 Annand Draw Tributary 06/94-08/96 N
in
t
-e
t

to Grassy Creek o
-
s
nta
..i;+•-
"" , monitors Armand Draw below NPDESIO site

6780 asst ,

discontinued 1996 upon completion of that pond.
(5N87WBABD)
YSAF4 Annand Draw, Tributary to Grassy
C 05/91-06/96 1.5 ft. wide (1.5 ft
dee
) Pa
h
ll

reek .
p
rs
a
flume w/continuous

6968 feet flow recorder. Monitors baseline data only for Annand

(5N87W8CDB) Draw downstream of proposed mining. Discontinued
and replaced with YSA4
YSGF5 Grassy Creek
6905 feet 04/91-present 2.0 ft. wide (2.0 ft. deep) Parshall flume w/continuous

(5N87W16DAA) flow recorder. Monitors downstream of minor disturbances
by Yoast Mine in Grassy Creek basin. Will discontinue
continuous flow recorder starting in 1994
D
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