Insights > Lewis Creek Reservoir Updates

Lewis Creek Reservoir Updates

By: Corporate Editorial Team

05/30/2015

Update - 6/17/15 12:00 pm

On May 21, Entergy Texas notified local authorities of the potential for dam failure at the Lewis Creek Reservoir near Willis, Texas. The dam and surrounding areas have experienced persistent rainfall in 2015, including more than 12 inches of rain in May, causing extensive saturation and some soil movement along the reservoir dam.

Results from geotechnical experts’ analysis show the dam is safe, and that appropriate measures for protecting the dam and public safety are being taken.

Previous soil movements which occurred in May affected the downstream slopes of the dam to a shallow and limited depth, and did not compromise the integrity of the overall structure. 

Key Messages:

• A visual inspection of the Lewis Creek Reservoir Dam took place this morning, following Tropical Storm Bill’s landfall and passage through Southeast Texas yesterday.
• No new soil movement occurred as a result of the rainfall.
• Protective coverings that were previously installed remain secure.
• As the storm system continues to move through the state, areas west of Houston, including Willis and Conroe, could experience additional rainfall.
• The intermediate soil stabilization work will resume after the weather system moves through the area.

Additional Messages:

• We will continue to monitor the dam as weather conditions allow.
• Steps have been taken to protect equipment and materials from wind gusts.  
• Crews, material and equipment remain on site, and we are prepared to respond to any soil movements should they occur.

Maps

• Lewis Creek Reservoir: Dam Inundation Exposure Estimates
• Lewis Creek Dam: Area of Concern

Photos

• Workers are continuing to make repairs to areas where persistent heavy rains have caused the dam's soil to become saturated to the point of sloughing off.

News Releases

• 6/1/15 - Entergy Confirms Lewis Creek Dam Safe and No Threat to the Public
• 5/25/15 - Lewis Creek Dam Intact After Storms Move Through the Area
• 5/25/15 - Reservoir Repairs Improve Dam Condition
• 5/24/15 - Montgomery County Emergency Management Media Release: Mandatory Evacuations Cancelled
• 5/24/15 - Visual Inspection Reveals No Additional Areas Of Concerns, Lewis Creek Levee Holding
• 5/24/15 - Lewis Creek Units Taken Offline; Dam Repair Work Continues
• 5/23/15 - Progress Made to Mitigate Soil Slides at Lewis Creek Reservoir
• 5/22/15 - Joint Press Release: Entergy Lewis Creek Reservoir Dam Update
• 5/21/15 - Lewis Creek Reservoir Update

Video

• 5/25/15 - Entergy Texas President and CEO Sallie Rainer at the Lewis Creek Dam 

Tags

Texas  Lewis Creek  Corporate 

Corporate Editorial Team