Overview
The Sumner Mine operates a sophisticated dual-plant processing system for producing high-quality frac sand. The wet-processing plant is located adjacent to mining operations, while the dry-processing facility is situated 8 miles east in Weyerhaeuser, WI. This integrated system processes ROM sandstone into specialized products for hydraulic fracturing applications.
Key Process Stages
- Primary Crushing: ROM sandstone is crushed to manageable sizes while preserving grain integrity
- Wet Processing: Material undergoes size, shape, and density separation at 500 tph capacity, producing 8/50 and 30/70 WIP material
- Material Transport: WIP is trucked to dry plant via third-party contractor (Antczak Trucking)
- Dry Processing: Final drying and sorting at 375 tph capacity yields 20/40, 30/70, and 100 Mesh (50/140) products
Critical Data
| Parameter | Value |
|---|---|
| Wet Plant Capacity | 500 tph (454 mtph) |
| Dry Plant Capacity | 375 tph (340 mtph) |
| ROM Stockpile | 60,000 short tons (54,000 mt) |
| WIP Stockpile | 300,000 short tons (272,000 mt) |
| 2024 Production | 1.34M short tons (1.22M mt) |
| Total Employees | 70 (50 wet plant, 20 dry plant) |
Processing Equipment
Wet Plant
- In-line crusher and scalping screeners
- 10×10 and 8×8 density separators
- Attrition scrubbers
- Cyclones
- Belt presses
- Dewatering beds
- Clarifier and process water tanks
Dry Plant
- Three fluid bed dryers
- Rotex mineral separators
Both plants operate year-round with scheduled maintenance periods. Quality control is maintained through laboratory sampling at multiple process stages.
Based on filing data from 2024-2025.
