Dog River Reservoir Expansion
Microtunneling
Huxted Trenchless installed three 51-inch diameter microtunnels with lengths of 144 LF, 110 LF and 96 LF. All three drives were launched from a common jacking shaft at varying elevations, and each required retrieval of the microtunnel boring machine (MTBM) from within the reservoir.
The work demanded precise alignment control and close coordination to accommodate the multiple tunnel elevations and to complete each MTBM retrieval successfully.