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The lower Colorado is the most-threatened river in America, a conservation advocacy group said in its annual report published Tuesday. The nonprofit American Rivers had placed the entire Colorado River and upper river atop its list of “most-endangered rivers” in previous years. But this is the first time the lower Colorado, which supplies Las Vegas with 90 percent of its water via Lake Mead, has been designated as in danger. “The main criteria we use is whether there’s a key decision point in the year,” said Amy Kober, a spokeswoman for the group. In the case of the lower Colorado,

Over the past five years, California slowly wilted, then parched and crisped. The state went through a period of severe drought, which hurt the state’s agricultural industry and necessitated harsh cutbacks in residential water use. At last, rain has come. Gov. Jerry Brown announced on Friday that the state of emergency was officially over. The drought might officially have ended, but groundwater stores remain depleted. In the face of this, several environmentalist groups have filed a lawsuit against the city of San Bernardino Municipal Water Department and the city of San Bernardino, arguing that a new water management plan will hurt the endangered Santa Ana sucker, a small fish.

The U.S. Bureau of Reclamation is boosting the water allocation for farmers south of the Sacramento-San Joaquin Delta to 100 percent for the first time since 2006. The announcement Tuesday comes only weeks after the bureau told disappointed growers that they would receive 65 percent of the contract supply from the Central Valley Project. They received a 5 percent allocation last year, causing them to fallow at least 200,000 acres in the Westlands Water District. “That should have been a no-brainer – 100 percent allocation,” said Ryan Jacobsen, chief executive officer of the Fresno County Farm Bureau.

The water agency that supplies drinking water to Los Angeles agreed Tuesday to contribute $1.5 million toward the planning of Sites Reservoir in the Sacramento Valley, giving the agency a toehold in a potentially valuable storage project. The board of the Metropolitan Water District of Southern California, as expected, approved the expenditure by a unanimous vote. If the agency eventually decides to contribute to the construction project itself, it would entitle Metropolitan to control up to 50,000 acre-feet of storage in the reservoir. Sites, to be built on the Glenn-Colusa county line, would store up to 1.8 million acre-feet.

Gov. Jerry Brown’s administration is using federal security regulations written to thwart terrorism to deny public access to records that experts say could guide repairs to the Oroville Dam and provide insight into what led to the near catastrophic failure of its emergency spillway. The administration also is blocking public review of records that would show how Brown’s office handled the February crisis at Oroville Dam that led to the two-day evacuation of nearly 200,000 Northern Californians. Days after the evacuation orders were lifted in February, The Sacramento Bee filed requests to the state under the California Public Records Act.