More than 15,000 dams in the US would likely kill people if they failed, and at least 2,300 of them are in poor or unsatisfactory condition, according to recent data from the federal government’s National Inventory of Dams.
Three City of San Diego reservoirs will reopen for public recreation this weekend. Miramar Reservoir in Scripps Ranch and Lake Murray in San Carlos open on Friday. The Lower Otay Reservoir will reopen on Saturday, May 16.
The three reservoirs will be open during regular business hours for walking, jogging, cycling, fishing, and boating, with new safety protocols in place. Normal fishing and boating fees will apply.
New protocols include:
“As we continue to reopen safely and responsibly, we’re looking to expand recreational opportunities for San Diegans eager to stretch their legs or take their boat out on the lake,” said San Diego Mayor Kevin Faulconer.
Sprawled across a desert expanse along the Utah-Arizona border, Lake Powell’s nearly 100-foot high bathtub ring etched on its sandstone walls belie the challenges of a major Colorado River reservoir at less than half-full. How those challenges play out as demand grows for the river’s water amid a changing climate is fueling simmering questions about Powell’s future.
Three City of San Diego reservoirs will reopen for public recreation this weekend. Miramar Reservoir in Scripps Ranch and Lake Murray in San Carlos open on Friday. The Lower Otay Reservoir will reopen on Saturday, May 16.
The three reservoirs will be open during regular business hours for walking, jogging, cycling, fishing, and boating, with new safety protocols in place. Normal fishing and boating fees will apply.
New protocols include:
“As we continue to reopen safely and responsibly, we’re looking to expand recreational opportunities for San Diegans eager to stretch their legs or take their boat out on the lake,” said San Diego Mayor Kevin Faulconer.
San Diego Police Department personnel will enforce illegal parking at the lakes, in the bike lanes, along the red curbs, or on sidewalks. Parking congestion and illegally parked vehicles originally forced San Diego to close the reservoirs to recreation on March 22. Any violations of the new protocols will be monitored with an education-first focus.
Four other San Diego reservoirs – El Capitan, Hodges, San Vicente, and Upper Otay – are still being evaluated for potential reopening at a future date. Barrett and Sutherland Reservoirs will remain closed all year.
Walkers at Santee Lakes. Photo: Padre Dam Municipal Water District
Santee Lakes reopened its day-use park day with some restrictions on May 1. There is a limited occupancy each day, physical distancing is required, and hours are limited to 9 a.m. to 5 p.m. The lake’s campsites remain open, but campers must practice physical distancing while on site.
For more information about Santee Lakes go to: https://www.santeelakes.com/COVID19_dayuse_protocols.
For more information about the City of San Diego’s reservoirs go to: sandiego.gov/reservoirs-lakes
As of Monday, the National Oceanic and Atmospheric Administration’s forecast for this year’s expected water supplies in the Colorado River is at 59% of average. That’s not good news.
If that prediction proves true, this will be one of the driest water years since Lake Powell was constructed nearly 60 years ago. The volume of water stored in Lake Powell each year is affected by three primary factors: the amount of water flowing into the reservoir after ‘Upper Basin‘ water users have extracted water for their use, minus water released from the reservoir to support Lower Basin water users, and minus evaporation from the reservoir itself. Lake Powell will lose – by my estimation — about 22 feet of water this year, or about 2.1 million acre-feet of storage.
At that point, the reservoir will be 60% empty.
The last seasonal survey of snow in the Sierra Nevada confirms that California had a dry winter that will leave much-needed runoff levels below normal, authorities said Thursday.
The snow was only 1 ½ inches deep at the traditional manual measuring site at Phillips Station in the range east of Sacramento, and the water contained in it was equivalent to just a half-inch, which is 3 percent of the May average for the location, according to the state Department of Water Resources.
Sierra snow melt typically provides about 30% of the state’s water supply.
More broadly, 130 electronic snow sensors scattered throughout the Sierras indicated that California’s snow pack water equivalent is 37 percent of the May average.
Readings for April also were well below average.
“March and April storms brought needed snow to the Sierras, with the snow pack reaching its peak on April 9, however those gains were not nearly enough to offset a very dry January and February” and the last two weeks of higher temperatures have rapidly reduced the snow pack, said Sean de Guzman, chief of the department’s Snow Survey and Water Supply Forecast Section.
The snow measurements help in predicting runoff into reservoirs that will help meet California’s water demand in the summer and fall, the water agency said.
At the moment, reservoirs are in good shape, with the six largest close to or even above their historical averages. Lake Shasta, California’s largest surface reservoir, is currently more than 80% full, authorities said.
California’s Central Valley — one of the richest agricultural regions in the world — is sinking. During a recent intense drought, from 2012 to 2016, parts of the valley sank as much as 60 centimeters per year. “It isn’t like an earthquake; it doesn’t happen, boom,” says Claudia Faunt, a hydrologist with the U.S. Geological Survey. But it is evidence of a slow-motion disaster, the result of the region’s insatiable thirst for groundwater.
In San Diego County and across California, it’s been an awesome April for precipitation.
The Sierra snow pack, although still much smaller than normal for this point in spring, has partially made up what had been a huge shortfall just a few weeks ago. And just about every place from the desert to the coast has benefited from a substantial soaking.
Last week’s record-breaking storm lifted San Diego County well above normal precipitation for the rainfall season. The city of San Diego has had its wettest spring in decades, and it has already recorded 3 more inches of rain since Oct. 1 than it normally gets in an entire year.
Both Jameson and Gibraltar reservoirs are over capacity, with each holding some 100.4% of their respective capacities. Gibraltar Reservoir, holding 4,603 acre-feet of water, has experienced an increase of 2,064 acre-feet during the 2020 water year, which began Sept. 1, 2019, and runs through Aug. 31.
Many nature webcams in California are seeing record traffic and interest this past month, as people bracing against the coronavirus pandemic look for virtual escapes from the doldrums of life indoors.
