REP08811

• Permit No: C1992081
• IBM Index Class Name: Report
• Doc Date: 11/17/1995
• Doc Name: DIVISIONS REVIEW OF 1994 AHR
• From: DMG
• To: HAYDEN GULCH LOADOUT AHR FILE
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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mg/1 vs .2 mg/1 for manganese and .055 mg/1 vs .02 mg/1 for
selenium) for agriculture and irrigation on 4/20/94 for HGSD3.
However, review of the historic data shows that these exceedances
are sporadic, showing no trend. The total dissolved solids for
HGSD3 was 3684 mg/1, above the suspect limit of 750 mg/1 for crops
in the Yampa valley, but below the limit of 5000 mg/1 for
livestock. The specific conductance of 4240 umhos/cm at HGSD3 was
above the 1000 umhos/cm for crops in the Yampa valley. All other
parameters were below the material damage suspect limits. Because
there were no analyses performed at the upstream HGSD1 for 1994, no
comparisons could be made between the upstream and downstream
surface water stations.
A review was made of the Stream Classifications and Water Quality
Standards, June 1991, of the Colorado Water Quality Control
Commission's report 3.3.0, Classifications and Numeric Standards
Upper Colorado River Basin and North Platte River, June 1991. The
HG Loadout falls within stream segment #12 of the Yampa River
Basin. That segment is classified as agriculture, aquatic life cold
2, and recreation 2. There are no numeric standards for metals and
inorganics. However the ph at the HGSD3 site was 8.4, within the
acceptable range of 6.5-9.0. There currently is no requirement to
sample for dissolved oxygen so that parameter could not be compared
for compliance.
Alluvial wells HGDALI and HGDAL3 were sampled on 5/4/94 and
10/4/94. Field parameters and full suite laboratory parameters were
analyzed. Comparisons could not be made between the analytical
results and the material damage suspect levels. The analytical
results were presented as dissolved species whereas the material
damage limits were presented as total recoverable species.
Comparisons were made, however, between 1994 results and results
from previous years. For HGAL1, the up dip alluvial well,
alkalinity, boron, conductivity, iron, ammonia, sodium and
bicarbonate were generally higher than in previous years. For
HGDAL3, the downgradient alluvial well, only manganese was higher
in 1994 than in previous years. In general, chemical concentrations
either decreased or remained the same as one went downgradient from
HGDALI to HGDAL3.
There was only one discharge from pond 1 (truck loop pond) and none
from pond 2 (rail loop pond). The one discharge was due to
dewatering by pipe on 3/2/94 for the purpose of restoring pond
capacity. The NPDES parameters for that discharge were in
compliance.
3.0 Probable Hydrologic Conaequenoes
Citing water quality data, the operator has asserted that the
stream water, historically and present day, has not been acceptable
for irrigation and. has been only marginally acceptable for
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