2018-01-16_PERMIT FILE - M2017036 ‎(2)‎

• Permit No: M2017036
• IBM Index Class Name: Permit File
• Doc Date: 1/16/2018
• Doc Name: Groundwater Study
• From: Loveland Ready-Mix Concrete
• To: DRMS
• Email Name: JLE
• Media Type: D
• Archive: No

0 REG/
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v�3
Second Submittal
336 6
••.��� !�.• Table of Contents
1.0 INTRODUCTION........................................................................................1
1.1 Project Description ..........................................................................1
1.2 Objectives........................................................................................3
1.3 Approach.........................................................................................3
2.0 BACKGROUND.........................................................................................4
2.1 Geologic Setting ..............................................................................4
2.2 Hydrologic Setting ...........................................................................5
2.2.1 Climate .................................................................................5
2.2.2 Surface Water.......................................................................5
2.2.3 Groundwater.........................................................................6
2.2.4 Alluvial Aquifer......................................................................8
2.2.5 Groundwater Flow Patterns..................................................8
2.2.6 Local Water Quality ..............................................................9
2.3 Conceptual Model..........................................................................10
2.3.1 Boundary Conditions ..........................................................10
2.3.2 Hydraulic Parameters .........................................................11
3.0 NUMERICAL MODEL FRAMEWORK.....................................................13
3.1 Numerical Modeling Code .............................................................13
3.2 Numerical Modeling Domain .........................................................13
3.3 Numerical Model Boundaries ........................................................13
3.4 Model Parameters.........................................................................14
3.5 Model Timeframe...........................................................................14
4.0 MODEL CALIBRATION...........................................................................15
4.1 Calibration Targets........................................................................15
4.2 Calibration Results ........................................................................15
4.3 Parameter/Boundary Sensitivity ....................................................16
4.4 Discussion .....................................................................................16
5.0 MODEL PREDICTIONS...........................................................................17
5.1 Mining Plan—Phases 1 through 5...................................................18
5.2 Mine Plan—Reclamation.................................................................18
5.3 Results Discussion ........................................................................19
5.3.1 Drawdown...........................................................................19
5.3.2 Mounding............................................................................19
5.3.3 Ditch / Drain Effects............................................................19
5.3.4 Water Quality......................................................................21
5.4 Discussion .....................................................................................21
5.4.1 Model Stability ....................................................................21
5.4.2 Predictive Results...............................................................21
6.0 MITIGATION STRATEGIES ....................................................................21
Loveland Ready-Mix Concrete ii Telesto Solutions, Inc.
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