HYDRO23541

• Permit No: C1981019
• IBM Index Class Name: Hydrology
• Doc Date: 5/10/1999
• Doc Name: FIRST QUARTER 1999 REview Letter
• From: DMG
• To: COLOWYO COAL MINE
• Permit Index Doc Type: DMR’s
• Media Type: D
• Archive: No

7~
J y-
STATF. OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department ui N.lural Resources
I } I }Sherman St., Room ? 15
Denrer. Colorado 80?03
phone: [phone]
FAX: [phone]G
Interoffice MEMORANDUM
to: DMR file, C-81-019, cc: Dan Hernandez
~,~"„'~
from: Byron G. Walker
subject: Review of 1Qtr 1999 DMR, C-81-019
date: ] 0 May 1999
DIVISION Of
MINERALS
St
GEOLOGY
0. E C L A M A T I O N
MINING•SAFE rY
Bill Owens
Governor
Greg E. Watcher
E.ecmive Direao~
Michael B. Long
Division Dnedor
re: Colowyo letter to CDPHE, April 26, 1999, Colowyo .Coal Company L.P.
(Colowyo); permit No. CO-0045161 First Quarter 1999 Discharge Monitoring Report, with
attachments.
The 1"Quarter 1999 DMR reports were reviewed.
Outfall 001 A (Streeter Pond). This pond was reported as having discharged. All parameters were
reported as within allowable primary limits. Dischazges from the Streeter Pond were observed at
the time of the 20 January and 18 February CDMG inspections.
Outfall 002A (Facilities Area Pond). This pond was reported as having no discharge.
Outfall 003A (Loadout Pond). This pond was reported as having no discharge.
Outfall 004A (Gulch A Pond). This pond was reported as having no discharge.
Outfall OOSA (Stoker Coal Pond). This pond was reported as having discharged. All parameters
were reported as within allowable primary limits.
Outfall 006A (Rail Loop Pond). This pond was reported as having no discharge.
Outfall 007A (Prospect Pond). This pond was reported as having no discharge.
Outfa11008A (West Pit Pond). This pond was reported as having no discharge.
Outfall 009A (Section 16 Pond). This pond was reported as having no discharge.
Outfall 010 A (Taylor Creek Pond). This pond was reported as having discharged. Total suspended
solids were reported as 40 mg/1 maximum, under the allowable primary limit of 70. Average was
reported as 40 mg/I, over the 30 allowable primary limit. By the referenced letter, Colowyo
requested that the Altemate Limits apply. Kimberley Wolf explained (during a coal partial
inspection of Colowyo) to Byron Walker the derivation of the average value. Byron Walker brought
to Kimberley WolFs attention that the Total Iron value of 8.3~ mg/1 z 7.0 maximum primary limit.
By telephone call of 5/5/99, Kimberley Wolf added Total Iron to the request for application of
Altemate Limits.
The CDMG inspections for 20 January and 18 February reported no discharge from the outfalls other
than Streeter Pond.