2021-04-05_PERMIT FILE - M2021021

• Permit No: M2021021
• IBM Index Class Name: PERMIT FILE
• Doc Date: 4/5/2021
• Doc Name: Application
• From: IHC Scott, Inc.
• To: DRMS
• Email Name: ACY
• Email Name: THM
• Email Name: AWA
• Media Type: D
• Archive: No

P,fle Gravel Pit #1 (March 2021
Table 3.Water Use Demands for Active Minin
Exposed
Amount of Water Lost Water Used Groundwater Domestic/ Total
Aggregate With Mined for Dust Evaporation Commercial Operational Water Use
Production Aggregate Control Indoor Use
Volume(AF) Avg
Rate
Month tons AF AF AF AF m
Jan 16,667 0.491 3.07 0.00 0.00 3.56 26.0
Feb 16,667 0.491 3.07 0.00 0.00 3.56 28.8
Mar 16,667 0 491 3.07 0.00 000 3.56 260
Apr 16,667 0 491 3.07 0.00 0.00 3.56 269
May 16,667 0.491 307 0.00 0.00 3.56 26.0
Jun 16,667 0.491 3.07 000 0.00 3.56 269
Jul 16,667 0 491 3.07 0.00 000 3.56 26.0
Aug 16,667 0.491 3.07 000 0.00 3.56 260
Sep 16,667 0 491 307 0.00 0.00 3.56 26.9
Oct 16,667 0.491 307 0.00 0.00 3.56 26.0
Nov 16,667 0.491 3.07 0.00 0.00 3.56 269
Dec 16,667 1 0.491 1 3.07 1 000 1 000 1 3.56 1 260
Total 200,000 1 5.89 1 36.83 1 0.00 0.00 42.72
Table 4.Water Use Demands for Post Mining
Gross Evaporation-Post Mining
For Finished Pond Surface Area:
Gross Unit Evaporation 53 acres
Month /Per 1 Acre AF Volume AF Average Rate m
Jan 0.11 -
Feb 0.13 -
Mar 0.21 1093 79.8
Apr 0.34 1789 134.9
May 0.45 23.85 174.1
Jun 054 2882 217.4
Jul 056 2981 217.6
Aug 0.51 26.83 195.8
Sep 0.38 19.88 149.9
Oct 026 1391 101.5
Nov 015 7.95 60.0
Dec 0.11 -
Total 3.75 179.87
8.7 Colorado Discharge Permitting System (CDPS) Permit and Army Corps of Engineers
(ACOE) Permitting
Scott will have an approved CDPS permit from the CDPHE-WQCD and ACOE prior to any
discharge.
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