New images reveal a large array of "rock bolts" - that were drilled and emplaced during repair work- that are now observable via the heads of the bolts slightly protruding at the surface of the concrete slabs. Counted 34 bolt locations (circled). These rock bolts will augment the original rock anchor bars within and under the concrete slabs. Notice there is a higher concentration of rock bolts on the Left side of the Spillway. This is within and next to the slab & sidewall that had shifted downslope.
Green drainage pipe has been inserted into the 12" sidewall Drain pipe that became disconnected from erosion of the backfill and/or from the downslope shift of the sidewall. This simple repair "fix" - using the drainage pipe - allows water - if any - from this spillway drain to bypass the backfill area to prevent erosion. In an earlier news clip video, the image resolution mixed with the billowing mist of the spillway waterfall created an illusion that this pipe looked as if water was flowing (light modulation from the mist gave a "waterflow movement illusion to the fixed pipe"). A new video image capture reveals it is just a bypass fix to the damaged/truncated spillway sidewall drain.
..thanks janetjanet998 for tip info & links….
Large Array of Rock Bolts emplaced to secure spillway Concrete Slabs & a "bypass" drain pipe. Notice there is a higher concentration of rock bolts on the Left side of the Spillway. This is within and next to the slab & sidewall that had shifted downslope.
