USACE announces assessment on Lewisville Lake Dam study

Public meeting scheduled for Tuesday, Sept. 27

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Map of Lewisville Dam area included in Dam Safety Modification Study (Via USACE DSMS)
Plaque on Lewisville Dam showing completion in 1952. The letters that used to spell "Garza / Little Elm" - the original name of the lake - are ground down. (File photo - 2013 - Steve Southwell)
Plaque on Lewisville Dam showing completion in 1952. The letters that used to spell “Garza / Little Elm” – the original name of the lake – are ground down. (File photo – 2013 – Steve Southwell)

U.S. Army Corps of Engineers Fort Worth District officials released the Environmental Assessment and Draft Finding of No Significant Impact on the proposed dam safety modifications to the Lewisville Lake Dam today and is seeking comments on assessing the potential environmental consequences resulting from its implementation.

 

Work has been under way most of 2016 to repair a 161-foot-long slide on the slope of Lewisville Dam. (Photo courtesy U.S. Army Corps of Engineers)
Work has been under way most of 2016 to repair a 161-foot-long slide on the slope of Lewisville Dam. (Photo courtesy U.S. Army Corps of Engineers)

While dam failure is a remote probability, the risk to human life and property should failure occur is high enough to warrant action to address identified deficiencies. Under the proposed action, the USACE would reduce risk of dam failure from seepage deficiencies at two different locations and risk of dam failure associated with spillway instability. All the construction activities associated with the proposed action would be conducted on Lewisville Lake federal project lands.

An open house for the Lewisville Dam Safety Modifications EA will be held on Tuesday, Sept. 27, from 6 to 8 p.m. in the Black Box Theater Room at the MCL Grand Theater.

Photo of western retaining wall on the downstream side of the spillway of Lewisville Dam, showing some shifting. (File photo, 2013 - Steve Southwell)
Photo of western retaining wall on the downstream side of the spillway of Lewisville Dam, showing some shifting. (File photo, 2013 – Steve Southwell)

Copies of the EA will be available at the meeting for review. All written comments must be postmarked on or before Oct. 15, 2016.

Comments may be submitted in writing to Marcia Hackett, USACE, Fort Worth District, P.O. Box 17300, Fort Worth, TX 76102-0300, or via email to marcia.r.hackett@usace.army.mil.

Written comments may also be submitted at the meeting.

Copies of the EA and draft FONSI may be reviewed online here.

Related Story: 7/15/2016 – Corps of Engineers changes course on environmental impact statement for Lewisville Dam

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