2018-06-22_HYDROLOGY - C1981019 - Laserfiche WebLink

Home Browse Search

Colowyo Coal Company L.P. Permit No. C-1981-019 Quarterly Impoundment Inspections Second Quarter 2018 * Moment in time measurement of the elevation of the top of the captured pool of water within the pond. **Impoundments volumes are estimated from pre-existing as -built surveys and estimates of accumlated sediment. I am a Licensed Professional Engineer in the State of Colorado. The information contained in this document was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation, and relying on the information provided to me by Colowyo Personnel, the information contained herein is reasonable and correct to the best of my knowledge and experience. Temporary Wilson Storage Section 36 Pond Middle Pond Section 25 Pond Coal Stockpile Sidehill Pond Section 26 Pond Facilities Pond Pond Inspection Date: 6/21/2018 6/21/2018 6/21/2018 6/21/2018 6/21/2018 6/21/2018 6/21/2018 6/21/2018 Inspector: Lee Sampson Lee Sampson Lee Sampson Lee Sampson Lee Sampson Lee Sampson Lee Sampson Lee Sampson Rule 4.05.9 (15)(a) Does the pond exhibit erosion, No No No No No No Pond Not Pond Not instability, structural weakness, Constructed Constructed or other hazardous conditions? Rule 4.05.9(15)(b) Existing and required Quarterly Inspection Quarterly Inspection Quarterly Inspection Quarterly Inspection Quarterly Inspection Quarterly Inspection Not Applicable Not Applicable monitoring procedures. Not Applicable - Not Applicable - Parshall Flume in Parshall Flume in Parshall Flume in Not Applicable - Rule Nondischarging Nondischarging Place and Place and Place and Nondischarging Not Applicable Not Applicable Instrument) Required Instrumentation Structure Structure Functioning Functioning Functioning Structure Rule 4.05.9(15)(c) Depth of Impounded Water Dry 5.0 6.0 Dry Dry Dry Not Applicable Not Applicable (ft)* Rule 4.05.9(15)(c) Elevation Dry 6412.0 7111.0 Dry Dry Dry Not Applicable Not Applicable of Impounded Water (ft)* Rule 4.05.9(15)(d) Existing Storage Capacity (ac- 0.38 3.27 1.94 1.60 6.72 1.33 Not Applicable Not Applicable ft)** Rule 4.05.9(15)(e) Any additional items effecting None None None None None None Not Applicable Not Applicable stability or maintenance items * Moment in time measurement of the elevation of the top of the captured pool of water within the pond. **Impoundments volumes are estimated from pre-existing as -built surveys and estimates of accumlated sediment. I am a Licensed Professional Engineer in the State of Colorado. The information contained in this document was provided by Colowyo Coal L.P. Being familiar with the Colowyo operation, and relying on the information provided to me by Colowyo Personnel, the information contained herein is reasonable and correct to the best of my knowledge and experience.