HYDRO25987

• Permit No: C1982056
• IBM Index Class Name: Hydrology
• Doc Name: SUMMARY OF RATIONALE TWENTYMILE COAL CO FOIDEL CREEK MINE FISH CREEK TIPPLE PN CO-0036684 ROUTT CNTY
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

~1
COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division
Rationale - Page 3. Permit No. CO-0036684.
IV. FACILITY DESCRIPTION
This facility has been active in the past, and so is not considered a
new facility. The federal regulations which apply at this site are
under 40 CFR 434, the Coal Mining Point Category, Subpart D, Alkaline
Mine Drainage (see Section VI.A.2).
Wastewater is generated at the site from three sources: wastewater
from cleaning the coal tipple (est. maa. 300 gpd), spoil spring water
(est. max. 12,900 gpd) and surface runoff (est. max. 462,700 gpd),
The spoil spring is located at the south end of Pond E. No chemicals
are used for treatment.
B. Wastewater Treatment Description
The wastewater is collected and treated in pond E, which has a maximum
holding capacity of 713,600 gal. No other treatment is provided.
Discharge point 001 is the outfall from the pond to Fish Creek, as
shown in Figure 1, Part I of the permit.
Pursuant to the authority of Article 9, Title 25, Regulations for the
Certification of Water Treatment Plant and Wastewater Treatment Plant
Operators, this facility ~32~],,require a certified operator.
May
V. PERFORMANCE HISTORY
A. Monitoring Data
1. Discharge Monitoring Reports: Table V-1 summarizes the effluent
data reported on the quarterly Discharge Monitoring Reports (DMRs)
from October, 1988 to September, 1990.
Table V-1 -- Self-tonitoring Results
No. of Samples Reported Previous No, of
Parameter or Reporting Concentrations Permit Violations
Periods Avg/ Min/ Max. Limit
TSS, mg/1 (30 day avg.) 8 6.5/K2/10 35 0
TSS, mg/1 (daily max.) 5 9.2/4/16 70 0
pH, s.u. 8 NA/6.7/8.3 6.5-9.0 0
T. Iron, mg/1 (30 day avg.) 8 .177/.053/.325 3.5 0
T. Iron, mg/1 (daily max.) 8 .28/.09/.47 7.0 0
Settleable Solids, ml/1 8 K.2/K.1/K.2 0.5 0
K = Less than
2. State: There are no state sampling results available for
t is facility.