2021-09-17_PERMIT FILE - M2021058

• Permit No: M2021058
• IBM Index Class Name: Permit File
• Doc Date: 9/17/2021
• Doc Name: Incompleteness Response
• From: Union Milling Contractors
• To: DRMS
• Email Name: DMC
• Media Type: D
• Archive: No

Mr. Dustin Czapla 2
CDRMS
September 14,2021
Response
No water diversions or impoundment will be constructed. (See Colorado Department of Public
Health and Environment (CDPHE) Stormwater Permit and CDRMS Drainage Plan (Appendix
G-1) for best water management practices).
4. Pursuant to Rule 6.4.4 (d): The size of areas to be worked at any one time.
Response
Areas to be mined will be dictated by customer aggregate specification and needs. Typically,
areas to be worked at any one time are an area less than 200 sq feet. Areas where screening and
stockpiles will be created that will occupy an area less than one (1) acre. The mining sequencing
for the various stockpiles is illustrated on Figure 4-13.
5. Pursuant to Rule 6.4.4 (e): An approximate timetable to describe the mining
operation. The timetable is for the purpose of establishing the relationship
between mining and reclamation during the different phases of a mining
operation.
Response
Leadville slag is devoid of vegetation. Topsoil for reclamation purposes is at the base of the
slag. When slag is excavated to the top of the topsoil and an area greater than two (2) acres,
reclamation activities (See Exhibit E-Reclamation) will commence.
I. An estimate of the periods of time which will be required for the various stages or
phases of the operation.
Response
The estimated time to mine slag stockpiles will be dictated by customer demands. The stockpiles
to be mined may need be processed to meet end users' specifications. Ballast and aggregates are
the major classified stockpiles. Stockpile A, C and E are "ballast" classified whereas "stockpile
B, D, F, G and H are "aggregate" classified. (See Figure 4-13). Estimated gross annual
production is estimated to range between 80,000 to 100,000 tons a year. Based on an annual
production rate and location approximately one to two acres will be mined. At a production rate
of 80,000 to a 100,000 ton per year the mine life is estimated to between 15 to 20 years.
II. A description of the size and location of each area to be worked during each phase.
Response
Annual ballast and aggregate production will affect no more than two acres. The location of
mining sequencing is illustrated on Figure 4-13.
III. iii. Outline the sequence in which each stage or phase of the operation will be
carried out.
Response
The location of mining sequencing is illustrated on Figure 4-13.