Photo submitted by Kelly Lee
The massive excavation project atop Cory Bluff continues, seen in this May 27 aerial photo. Project managers have decided they need to try and determine the cause for restricted water flow through the recently installed pipeline inside the partially collapsed tunnel some 90 feet below the surface. The pipeline apparently is not on grade, explains project managers. Whether it is laying atop debris or a geologic structure, a “rise,” within the tunnel is the question they hope to answer with more digging this week.
The big excavation project under way atop Cory Bluff to reestablish irrigation water flows for the North Delta Irrigation Company will continue.
After workers finally installed a four-foot diameter pipeline through the partially collapsed, quarter-mile-long tunnel on May 25, another problem now has to be dealt with.