 As of 2017, there were no plans to remove sediment from the reservoir or to mitigate its inflow.The 1989 Pass Through Agreement was designed under the assumption that, once Gibraltar reservoir is nearly full of sediment, it will be operated as a run-of-the-river project (serving only to divert water) with most of its storage functions transferred to Lake Cachuma.However, the Bureau of Reclamation predicts that the reservoir will not completely fill with mud; it will stabilize at about of water volume due to the "flushing action of high flows" and that this level will be reached around 2031.