Final Feasibility Study Begins for Temperance Flat Dam
Final Feasibility Study Begins for Temperance Flat Dam
Temperance Flat Dam Would Provide Groundwater Relief, Jobs
By Patrick Cavanaugh, Farm News Director
Mario Santoyo, executive director, San Joaquin Valley Water Infrastructure Authority (Joint Powers of Authority), described the major and historic event held last week at the Friant Dam regarding the Temperance Flat Dam and California’s future water supply.
“At the event,” Santoyo said, “a Memorandum of Understanding (MOU) between the U.S. Department of the Interior, Bureau of Reclamation and the Joint Powers Authority, basically defines what the scope of work is going to be. In essence, it is full cooperation between their technical people and our Joint Powers Authority. Our people are working on tailoring the application to the state to optimize how much money we get from them. Keep in mind, we’re talking big dollars here; we’re not talking a million or a hundred million.”
At Friant Dam, a Memorandum of Understanding was signed between the Department of the Interior, Bureau of Reclamation and Joint Powers Authority for the Temperance Flat Dam.
Santoyo hopes to receive $1B in funding for the Temperance Flat Dam, although “it is going to cost somewhere around $2.8B. The maximum you could ask from the state is $1.4B. We don’t expect to be getting that because there is a lot of competition and there’s not enough dollars to go around. We’re hoping to shoot for somewhere around $1 billion,” he stated.
“In parallel with our efforts with the state,” Santoyo explained, “we’re working on the federal side with our senators and our congress members to obtain what they call a federal construction authorization—which allowsthe federal government to move ahead with this project. Then we work on appropriations,” he said.
Santoyo said the funding necessary to complete and complement dollars from the state will be procured in the same fashion as have projects in the past. “The Bureau of Reclamation typically funds the construction of a project and then recovers the cost through long-term water supply contracts or adjustments to existing water supply contracts,” he stated. “In this case, it would be adjustments to existing water supply contracts.”
Santoyo also noted preliminary feasibility studies are underway. Those already completed triggered the final feasibility report, “which is going through a final upper management review before being released to the public. I think we are all pretty confident it will come out in a very positive manner. I would expect that in the next sixty days,” he said.
The expected completion of the project varies. Santoyo estimated physical completion within five years,” but it has to go through design and environmental paperwork, plus legal challenges could cause setbacks as well. By the time you’re good to go, you’ll end up having this project built in probably under 15 years,” he said.
DAM CREATES NEEDED JOBS FOR VALLEY RESIDENTS
Nevertheless, Santoyo said the benefits of the Temperance Flat Dam project is to creates an economic boom and an increase in available jobs. “You’re going to be spending about $3B here for materials, labor, and everything that goes into it. It will be an economic boom; and once it’s built, we get more water reliability, creating a better situation for the farmers, and that creates employment. I wouldn’t look at waiting 15 years, it starts as soon as we start building,” he said.
“The best year for Temperance Flat is when we have high runoff periods, and we have those frequently,” Santoyo elaborated. “What I’ve determined is that there’s a 50% shot every time we have one that we will be dumping more than a million acre-feet into the ocean. That’s equivalent to a full-year of water supply for the east side of the valley. That’s a lot of water.”
DAM PROVIDES GROUNDWATER RELIEF
“The fact is, without this project, we will not be able to meet the ground water sustainability laws that exist because this water will be necessary to move underground to all these regions,” he said. “Right now, as it stands, San Joaquin River Settlement has taken away the Class II water that used by the Friant contractors to replenish the groundwater. Unless we have a means of replacing it, and that would be through Temperance Flat, we’re going to encounter very serious problems,” Santoyo noted.
“Take the typical example of a year in which we can save a million acre-feet in storage. We are not going to keep it there,” he said. “We are going to move it via the canal systems to the various groundwater recharging basins,” which capture and replenish underground water. “It’s not a matter of whether groundwater storage is better [or worse] than above-ground storage; they work in conjunction with each other to maximize storage.”
DAM SERVES A PURPOSE IN TIMES OF CRISIS
“There are a lot of conversations about the San Andreas Fault rumbling. If we had an earthquake, we could have a seismic event in the Delta,” Santoyo said. “What differentiates this project from all the other projects is that we could take Temperance Flat water and go north via the San Joaquin River to the Delta, or south via the Friant-Kern canal, across the valley canal to the California aqueduct then subsequently down to southern California,” he said.
“In a scenario of Delta failure, in which water was no longer moving to the millions of people in Southern California, that would be a crisis,” he stated, “they would be looking for help in any way, shape, and form. Temperance Flat could do that. That’s one of the public benefits being looked at by the California Water Commission, in a category called emergency services. That was written in there specifically because of Temperance’s capability.”