About
Lake Travis Report publishes the current water level, percent full and water temperature for Lake Travis in Austin, Texas — for residents, boaters, and anyone who plans around the lake.
Lake Travis is a reservoir on the Colorado River in Travis and Burnet counties, Texas, about 13 miles west of Austin. It is managed by the Lower Colorado River Authority (LCRA) and controlled by Mansfield Dam.
The lake serves multiple purposes: flood control, water supply, hydroelectric power generation, and recreation. Conservation pool elevation is 681 feet above the NAVD88 +0.6 datum, with a storage capacity of approximately 1.14 million acre-feet.
LCRA — Lower Colorado River Authority
The single source for every live reading on this site. The LCRA operates Mansfield Dam and publishes its hydromet gauge data; we read elevation from site 3963 and water temperature from the separate temperature gauge at the same location.
Reference elevations
Every elevation on this site is measured against the NAVD88 +0.6 datum: dead pool 535.75 ft, conservation pool 681 ft, emergency spillway crest 714 ft, flood pool 721.4 ft, maximum design 745 ft, and top of dam 750 ft. These are published LCRA figures; the 614.18 ft record low (1951) is from the Texas Water Development Board’s historical record. All are fixed reference points, not readings — which is why the API does not repeat them alongside every measurement.
Gauge readings are collected every 15 minutes and the pages are rebuilt on the same cadence, so what you see is at most a few minutes behind the LCRA feed. The history page keeps one reading per day, and shows the day’s closing level.
When a reading is missing, this site shows nothing in its place. A gap in the water temperature trend means the temperature gauge was quiet, not that the water was cold.
All data is provided for informational purposes only. For critical decisions — navigation, flood safety, water rights — consult the LCRA directly.