See Our Previous Dam Engineering Projects

1. H & K Lake Dam - Mason Fork Ranch, Bandera County: This small-sized, high hazard dam in Bandera County, Texas; overtopped and was threatened with potential failure which could have threatened downstream lives. Performed a hydrologic and hydraulic (H&H) analysis to determine hydraulic adequacy. Determined that the dam was inadequate and developed plans & specifications to modify the dam to pass the Texas Commission on Environmental Quality’s (TCEQ) required test flood. Modifications included flattening both slopes, adding rock rip rap erosion protection of the upstream slope, constructing a reinforced concrete spillway and a rock lined discharge channel and stilling basin.

Rock rip rap lined upstream slope and concrete spillway.
Rock rip rap lined upstream slope and concrete spillway.
Rock lined chute sidewalls and stilling basin.
Rock lined chute sidewalls and stilling basin.
Rock lined stilling basin & slush grouted rip rap armor.
Rock lined stilling basin & slush grouted rip rap armor.

2. Randell Lake Dam – City of Denison, Grayson County: This 113-year-old dam impounds drinking water for the City of Denison in Grayson County, Texas. The dam was raised in 1940 to add more storage capacity and had 23 small manually operated radial gates installed as a modified spillway. Over the years, a large scour hole developed below the terminal end of the spillway. An on-site assessment was performed in 2008 which led to an updated hydrologic analysis. At the same time, it was determined that the manually operated gate system could not be opened in a timely fashion and would also expose city personnel to extreme elements during inclement weather. Additionally, a significant zone of pervasive seepage was located section of the dam which was raised in 1940. The dam was modified to pass the TCEQ required test flood for a high hazard dam by: 1). Constructing a weighted filter berm to control the seepage area, 2). Replaced the 23 radial gates with fixed-crest concrete ogee weirs with three stages of engagement, 3). Constructed a large roller compacted concrete (RCC) stilling basin to address the large scour hole, and, 4). Stabilized the upstream slope with slush grouted rock rip rap.

1940 era spillway with 23 manually operated radial gates and 30-foot  deep scour hole at terminal end of spillway (ca. 2008).
1940 era spillway with 23 manually operated radial gates and 30-foot deep scour hole at terminal end of spillway (ca. 2008).
Radial gates replaced with fixed level ogee weirs (ca.2013).
Radial gates replaced with fixed level ogee weirs (ca.2013).
Roller Compacted Concrete (RCC) stilling basin (ca. 2016)
Roller Compacted Concrete (RCC) stilling basin (ca. 2016)

3. Amanda Lake Dam – Lake Amanda Water Control & Improvement District No.1 – Tyler County, Texas: This low hazard dam overtopped and failed due to an inadequate spillway in 2016. The 110 property owners formed a Water Control and Improvement District to raise tax revenue to repair the dam. An H&H analysis was performed and used to develop plans and specifications for rebuilding the dam with a new ogee-crest spillway and a modified United States Bureau of Reclamation (USBR) Type-III stilling basin with chute blocks, baffle blocks and a dentated end sill. Construction was completed in 2019.

Ogee-crest weir
Ogee-crest weir
Modified USBR Type-III Stilling Basin
Modified USBR Type-III Stilling Basin

4. Clear Creek Lake Dam – Powell Hereford Ranch, Menard County, Texas: This low hazard dam was constructed in 1939 and had experienced severe concrete deterioration. The overtopping dam impounds the constant spring flow of Clear Creek. Control of water was an issue. The dam was capped with reinforced concrete.

Concrete encasement of older dam
Concrete encasement of older dam
Diversion of constant spring flow (20 cfs)
Diversion of constant spring flow (20 cfs)