Concerns over whether Colorado River inflows will be cut off from Matagorda Bay have been lowered thanks to substantial rains and runoff in September and October that provided some fresh water recharge to the Highland Lake reservoirs managed by the Lower Colorado River Authority (LCRA).

Last month the LCRA executive board approved submission of an emergency request to temporarily cut river inflows to the environmentally fragile Matagorda Bay system in an effort to meet the growing water demands of its many city, industry and agriculture customers.

The action was opposed by some environmental, conservation and wildlife groups, including Ducks Unlimited, who argued such action would provide potential negative impact to wildlife and the environment in an around the bay.

Appearing before the group in September, Ducks Unlimited Conservation Outreach Biologist Kirby Brown told LCRA board members that water conservation measures currently in place are not adequate and said that current LCRA water conservation programs penalize agriculture and the environment while allowing other water users to continue using water irresponsibly.

 

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To better serve all interests, Kirby suggested a shared responsibility for water conservation, criticizing urban homeowners for unnecessary use of water to green their lawns and wash their cars while farmers were forced to cut food production and wildlife and the environment in general were suffering the consequences of not enough water to go around.

But even as the September meetings were taking place, rains began falling across much of Texas and continued into the early days of October. But before the heavy rains subsided, LCRA had approved and sent the emergency request to the Texas Commission on Environmental Quality (TCEQ).

But on Oct. 16, LCRA sent out another request to the state water control agency asking it to delay consideration of the issue until Nov. 27, at the earliest. That’s because recent rainstorms generated enough flow in the river to meets the bay’s freshwater needs in October.

LCRA’s state-approved Water Management Plan requires Highland Lakes water be sent under certain conditions for the environmental health of the bay. LCRA released 8,684 acre-feet from lakes Travis and Buchanan in September to meet some of the requirements from earlier in the year. After the water arrived, salinity levels in the Bay’s delta dropped from 33 parts per thousand (ppt) to less than 28 ppt. Scientific studies have determined that levels greater than 30 ppt may not be suitable for oysters, juvenile fish and other species in the bay. Additional freshwater flowing into the bay from rain in September and October is expected to help maintain lower salinity levels.