By Joe Geever, Energy and Environmental Consultant
This summer, the California State Water Resources Control Board will decide whether to extend permits for several coastal power plants to continue using once-through cooling (OTC) – including the AES Alamitos Energy Center here in Long Beach. The Los Cerritos Wetlands Land Trust has some concerns about that plan.
OTC is a design feature of older power plants. The generators are cooled by water drawn from a waterbody, pumped through the cooling system and discharged back into the waterbody. Those old cooling systems also withdraw and kill marine life, causing a significant adverse impact on healthy marine life populations and ecosystems. This intake and mortality of marine life is particularly concerning here because the cooling water is withdrawn from Alamitos Bay and the Los Cerritos Wetlands.
In 2010, the California State Water Board passed regulations to modernize these antiquated cooling systems. The new rules allowed time for all the power plant owners to prepare, and included a schedule to stagger the modernizing retrofits and avoid any risk to electrical grid reliability. Until completed, the power plants were required to pay mitigation fees to “replace” the marine life killed.
The AES Alamitos power plant has completed one phase of that transition by replacing several of the older generators with more efficient gas turbines that don’t require OTC. But there are still some older AES Alamitos generators operating. These OTC generators were originally scheduled to be phased out in 2020, but the state’s energy agencies requested an extension to leave them online until 2023 to ensure grid reliability. Now, the energy agencies are requesting another extension until 2026, and that decision will be made by the State Water Board hearing this summer.
In brief, the energy agencies proposed the original schedule and now have requested two extensions. It’s not clear in the pending request that there won’t be more extensions. Of course, these extensions also prolong the marine life intake and mortality in the wetlands. Did you know that since the OTC regulations were adopted, the mitigation fees have not been adequate to meet the promise of “replacing” the marine life lost, and none of the mitigation fees have been designated for restoration projects in Los Cerritos Wetlands where the harm is caused?
The Los Cerritos Wetlands Land Trust is well aware of the difficulties of transitioning to a new energy reliability future. But we are concerned that the current transition from antiquated generators of the past is not meeting the promises of mitigating the impacts. Further, we think the State Water Board needs to make it perfectly clear that the energy agencies cannot continue requesting extensions of the law indefinitely.
Adapting our energy system to mitigate climate change is a thorny and difficult issue. But our coastal wetlands are also threatened by climate change and need restoration and protection. We strongly believe those goals can and must be met with equal urgency.
Los Cerritos Wetlands Land Trust has submitted its concerns to the State Water Resources Control Board. View the comment letter below.
Additonally, we are asking our supporters to sign a petition that will be submitted to the State Water Board this summer. To sign the petition visit www.change.org/AES-Extension
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