Following a multi-agency emergency preparedness exercise last week in Delta, OCID Vice President Jan Gage shared with the DCI some information from the Bureau of Reclamation about ongoing ground condition monitoring that takes place at Fruitgrowers Reservoir.
Last week, work crews were installing replacement instruments that measure the rate of ground movements and any "slippage" of the dam structure from its foundation.
Being replaced were three instruments called inclinometers. "These inclinometers are used to monitor the Antelope Hill landslide, and they have sheared off or are not readable any more due to the landslide moving," states a BuRec advisory that Gage received.
An inclinometer is defined by an online reference as a instrument that measures angles of slope or tilt. The devices have uses in geology, aviation, and other technical applications.
Also, according to the BuRec advisory supplied by Gage, "Antelope Hill is moving, but the dam is not. The (Antelope Hill) inclinometers have moved as much as eight inches in places. They were installed in 1998 or 1999. The inclinometers on the dam have only moved a maximum of 0.3 inches."
In 1994, BuRec issued a report on the FruitgrowersDam project that recounted some of its early history.
"Since the late 1890s, the fruit growers and farmers in the region located just northeast of the town of Delta, Colorado, had grown high quality fruits and crops on lands irrigated by water stored in the small dam constructed by the water users in 1898. As the needs of the users grew, the dam was enlarged to meet those needs. The water users of the area cared for their fields and orchards comfortable in the knowledge that their system would provide them with a reliable source of water.
"In 1937, after almost 40 years of reliable operation, their system failed. The dam, which was poorly designed and constructed from inferior materials, washed away, leaving the users without a source of water for their fields. Faced with the loss of their livelihood, the water users turned to the Bureau of Reclamation for help."
That help came in the form of the current Fruitgrowers Dam and Reservoir.blog comments powered by Disqus