Brightwater Conveyance Project (East Tunnel)
Bothell, WA, USA
SIZE / CAPACITY
15 m3/hr Bentonite
- Conceptual Design
- Structural/Mechanical Engineering
- Design & Supply of Control System
- Supply/Fabrication of all Equipment
- Supervision of Equipment Installation
- Commissioning and Training
- 1350 litre Colloidal Mixer
- 5600 litre Bentonite Hydration Tank
- Mocol High Pressure Grout Pump with Hydraulic Powerpack
- Screw Conveyor
- Silo Level Instrumentation
- Modified 20’ Insulated Container
- Motor Control Center
- Automated PLC Control System
- Touchscreen HMI
- Piping and Valving
The Brightwater Conveyance East Tunnel project is part of a wastewater conveyance system comprised of three separate tunnels. The east tunnel portion consists of a 14,050 ft concrete segmentally lined tunnel bored with a 19 ft. diameter Lovat Earth Pressure Balance Machine (EPBM). The TBM will bore to depths of 260 ft below the surface.
Four pipes will be installed in the completed tunnel ranging from 27 to 84 inches in diameter, along with three fiber optic cables to monitor the Brightwater facilities. The tunnel will then be backfilled with cellular concrete.
Team Mixing Technologies was contracted to fast track the design and supply of a fully automated batch plant capable of producing a high quality bentonite slurry. The bentonite slurry is used as an ingredient in the mix for back grouting the concrete segments. It is also pumped to holding tanks on the TBM for soil conditioning and TBM lubrication purposes.