In subsequent years, EBMUD constructed two additional aqueducts to distribute water to several other East Bay reservoirs.

In the 1980s with federal grant funding, EBMUD undertook a major facility expansion to accommodate wet weather waste water overflow (i.e. the vastly increased system demand in the rainy season).

In 1994, the EBMUD board of directors approved the Seismic Improvement Plan (SIP), a $189 million capital project designed to minimize damage and disruption in the event of a potential earthquake along the Hayward Fault.

Some of the major projects included in SIP were the Southern Loop Pipeline, a new 11-mile (18 km) seismically-reinforced alternate route which would allow restoration of water service; and seismic upgrades to the Claremont Tunnel.

EBMUD announced mandatory water rationing again in April 2022, following a bleak California snow survey and the driest January to March period on record.

[1] In normal years, EBMUD reservoirs in the East Bay receive an additional 30,000 acre-feet of local water from runoff annually.

EBMUD countered its critics by saying that at the time their officials believed the Los Vaqueros proposal was not sufficiently developed to be a reliable alternative for their future plans.

[a] Following a two-year trial, Sacramento Superior Court Judge Timothy Frawley agreed with the plaintiffs' objections and rejected the EIS in 2011.

[13] Specifically, Judge Frawley said the document completely omitted discussing a less destructive alternative - working with CCWD on expanding Los Vaqueros reservoir.

[13] After reviewing the ruling, EBMUD announced in December, 2011, that it had dropped plans for a new dam on the Mokelumne River, and would work with CCWD on expanding Los Vaqueros.