The City of San Antonio, Texas is completing one of its largest flood control construction projects to date, a multimillion dollar effort to improve storm water drainage into Woodlawn Lake by replacing the existing channel with a new channel of greater capacity in order to remove numerous private properties and public infrastructure from the 100 year flood plain, which experienced catastrophic flooding in 2002.

The construction of Phase 2 of the Seeling Channel Improvements project includes completing the channel work from near Wilson Boulevard to Morning Glory Drive and features the demolition and replacement of 2,470 lineal feet of existing concrete channel and 2 concrete vehicular bridges which cross the channel at Huisache Avenue and Morning Glory Drive.  The excavation for the new cast in place concrete channel structure averages 60 feet wide by 15 feet deep and is supported by an engineered steel beam and wood lagging shoring system in order to accommodate the limited work area access between the channel and adjacent private properties.

In advance of the new concrete channel and bridge improvements, existing underground potable water and sewer lines were kept in service while the installation of new replacement underground utilities took place.  New underground utilities include 3,500 lineal feet of 8 inch to 16 inch water line, 2,500 lineal feet of 30 inch sewer line and 350 lineal feet of 24 inch to 60 inch storm drain line.

Stiver Engineering provided the contractor with construction consulting through the design of the steel beam and wood lagging shoring system that the channel walls were poured against.

Stiver Engineering was retained by a local contractor to provide structural design through an alternative cantilevered wall design for the Hardy Yards project in Houston, Texas. The alternative design consisted of soldier piles and timber lagging and ranged in height from 4 feet to 10 feet.

Stiver Engineering designed a structural steel substructure for a solar panel system and a CMU wall around the top of a 1.154 M.G. water storage tank that is adjacent to the Exxon Campus and the Grand Parkway in the Woodlands. We also provided the contractor with the structural designs and drawings for construction.

This was the first project in the United States to include a solar panel system on a water storage tank of this size.

The Waterloo Park project, Austin, Texas, specified that the flood waters stretching from Waterloo Park to Lady Bird Lake be diverted 70 feet below ground through a concrete shaft and tunnel to be discharged into Lady Bird Lake 1 mile downstream. The project removed an estimated 50 acres from the floodplain in Downtown Austin.

Stiver Engineering provided construction consulting by designing the cut through the topsoil and limestone at the headworks facility in Waterloo Park. We also designed the cast-in-place reinforced concrete for the first section of the tunnel, the reinforced concrete and rock bolt retaining walls upstream of the intake structure, and a reinforced concrete temporary bulkhead within the tunnel.