Friday, July 22, 2011
Sunrise revealed another promise of rain looming on the horizon. Karen had constructed a pontoon that we intend to test as a discharge float, and we had been trying to get it dried out all week. Finally got it sealed up this morning. We cut the plywood and 2x4s to finish the containment and loaded all on Goose. We left the pontoon on a high spot along the bank at the site, and loaded the airboat to finish the outer containment wall. The wake from the airboat tested the rigidity of the wall and it proved to be quite resistant, not transferring but a few ripples into the pond from each wave.
In a total of about 3 hours, we installed 178 feet of containment. We were rather glad we didn’t have to cut that much cane, and it’s a trade off in cost to buy lumber or spend the man-hours. Now we can compare the performance of reeds vs plywood, not only in containing mud, but how fast it falls apart.
With the previous reed placement at Cell #4, the outer containment for the experimental cells is complete. Interior containment will be placed as the discharge is moved.
Lagniappe – Test Site update
After containment was completed, we stopped by the Test Site that had been partially filled earlier this year. We were happy to find that there was new vegetation colonizing the fill material. Spikerush (Eleocharis sp), Bacopa and one of the grasses were starting to take root.
Arrows indicate some of the areas that show new growth.
It doesn’t appear that the sediment has settled significantly in the last few months. When the experimental cells are filled, we plan to return to this area to expand the contained area, add more fill and build on what we started.