Water School

An interbasin transfer is the sale of water from one river basin to another. This type of transaction requires the state to pass legislation before it can take place. The Authority has Interbasin Transfer Agreements with the Lower Colorado and Trinity River Authorities.

Different laws for surface water use have led to conflicting claims over time. In 1967, the Texas Legislature directed a predecessor of the Texas Commission on Environmental Quality to settle claims. The agency looked at all claims and issued certificates of adjudication for those they approved. Each was assigned a priority date that determined the claimant’s seniority for water rights.

Senior rights have an earlier priority date and claimants who hold them have a higher priority to divert water from a stream or water body than those with more junior rights. However, in times of scarcity, when there is not enough water to meet demand in a basin, those who need water for domestic and livestock use have first right to water, regardless of one’s priority date.After domestic and livestock needs are met, those with senior water rights can insist diversions by those with junior wate...