What is the San Jacinto River Authority

One of 10 major river authorities in Texas, the San Jacinto River Authority (SJRA) is an agency of the State of Texas created in 1937 by Special Acts of the Texas Legislature. Its purpose is to develop, conserve and protect water resources of the San Jacinto River Basin. The SJRA is responsible for a number of activities, which include municipal and industrial water supply, water quality management, wastewater treatment and water and soil conservation.

facility locations

The SJRA’s general offices are located at Lake Conroe.  SJRA has three separate operating divisions:

The SJRA boundaries include the entire watershed of the San Jacinto River and its tributaries excluding Harris County. This includes all of Montgomery County and parts of Walker, Waller, San Jacinto, Grimes and Liberty Counties. SJRA serves many customers in the Houston area and is authorized to operate in East Harris County through an agreement with the City of Houston, which allows the SJRA to operate east of the San Jacinto River.

Lake Conroe – situated seven miles west of the City of Conroe at the Lake Conroe Dam. Although the lake is exclusively operated by the SJRA, the City of Houston owns a two-thirds interest in the lake; the SJRA owns one-third. In addition to operating the lake, this division handles the licensing, regulation and enforcement functions related to on-site sewage systems around Lake Conroe. Because Lake Conroe is a major recreational facility, the division also approves licenses, and inspects boat sanitation, piers, boat-slips, boathouses, marinas, etc. as well as collects annual fees and rentals for these facilities.

The Woodlands – located in southern Montgomery County, The Woodlands Division provides water supply and wastewater treatment services from centralized facilities to the 90,000-person community. To provide these services, the SJRA operates three wastewater treatment facilities with numerous pump stations, water wells, water storage tanks and distribution facilities.

Highlands – located in East Harris County where the SJRA owns and operates a pump station at Lake Houston. Raw water from the lake is diverted into an extensive 38-mile system of canals and a 1400-acre reservoir for delivery to customers such as Exxon Mobil, Chevron Phillips Chemical Company, and others pursuant to long-term water supply contracts.

DID YOU KNOW?

The SJRA receives no money from the state, nor does it collect any type of taxes. Income is primarily derived from the sale and distribution of water and treatment of wastewater. This revenue covers the cost of operation and maintenance as well as outstanding debt. Revenue bonds are sold to finance projects.


There are two main types of reservoirs – water supply and flood control.  Water supply reservoirs attempt to maintain water levels as high as possible to assure the largest water supply in times of drought. Flood control reservoirs maintain water at a low level so that when a storm comes, water may be detained and stored to decrease or eliminate the threat of flooding downstream from the reservoir.

Lake Houston, Lake Conroe and Lake Livingston are water supply reservoirs. Addicks and Barker Reservoirs are flood control reservoirs. Some reservoirs, like Canyon Lake, have both water supply storage and flood water storage.
reservoir

Safety Freeboard is the  area between the water surface and top of the dam, large enough to prevent waves from overtopping the dam.