Retaining wall failure and landslide in San Antonio Displaces 25 Homeowners

San Antonio retaining wall failure landslide


Some of the latest info that came out is that the retaining wall in question did not have a permit from the City for its construction.

San Antonio retaining wall failure landslideDave’s Landslide Blog has some nice info on the fiasco, it has even attracted some comments from affected residents. He noted a strange lineation on an old image in Google Earth. I’m not sure I would agree that it was related to a slope or wall failure, it looks more like water draining down the street  from someone washing their car or something. (Photo by Rodolfo Gonzalez – American-Statesman)

The Eng-Tips geotechnical forums have a few threads on the failure as well. A lot of arm-chair geotech going on there, here is the best thread I’ve come across. While we’re doing the arm-chair thing, that retaining wall doesn’t look like much of a wall to me, more like grouted rip-rap (see closer photo below).


Photo by Rodolfo Gonzalez – American-Statesman

Map of Failure Location

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1 Comment

  1. Many waterfront properties all over the world having retaining walls or seawalls are aging to the point of needing repair or worse, replacement. Failure to provide proper weep hole relief has resulted in water being trapped behind the wall causing erosion, pressure, and wall failure.

    Natural erosion can be controlled (possibly even prevented altogether) with the use of a proper weep hole drain. Water pressure can be released without taking the valuable soil into the bay or canal further preventing erosion or sink holes. The Jet Filter flush mount system can be easily installed and maintained from the waterside of a new or existing seawall and retaining wall.

    The purpose of weep holes is to relieve hydrostatic pressure from behind the wall. Properly maintained, the seawall should last a lifetime without major repairs. The patent pending Jet Filter relieves hydrostatic pressure on almost any wall design.

    “The fix permits drainage without erosion (about 6 months now). I used to be able to see multiple areas where there was flow over the top of the wall (from rainfall accumulations behind the seawall). I have seen none since completing the Jet Filter installation”. (Sonny, Homeowner Gantt Lake, Alabama).

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