Fort Collins officials voice concerns with the project and water quality issues. Reclamation officials estimate the need for as many as 50 trucks per day to transport rock, sand and gravel to Horsetooth Dam during the construction project. The last usable boat ramp at Horsetooth Reservoir goes dry at elevation 5,359 due to falling water levels. Reclamation and District crews begin working around the clock to test the sinkhole near Horsetooth Dam. The District and Reclamation conclude the sinkhole is the main source of water seepage at Horsetooth Dam.
Contractors begin filling the sinkhole near the left toe of the dam with grout.
District and Reclamation crews then install a 100-square foot cap and thousands of cubic yards of clay and rock. The District begins lowering the reservoir's surface level, allowing Reclamation geologists and engineers to examine anomalies at the bottom of the reservoir near Horsetooth Dam.