The Valley Creek Wastewater Treatment Facility set a new standard as part of a $14,000,000 (1976 dollars) facility owned by Jefferson County, Alabama.

14MGD WWT & Anerobic Sludge Plant

Waste sludge from the primary and secondary nitrification clarifiers was sent to six anaerobic digesters. Four existing anaerobic digesters were emptied and refitted with gas recirculation pumps and diffusers. Two new 90-foot diameter digesters were also built with gas recirculation.

Excess methane gas was pumped into the large spherical tank on the upper right side of the aerial image. The methane gas was stored and blended with natural gas to power three 12-cyclinder engines in the Adminstration/Blower/Lab Building--seen in the center-left side of the aerial photo.

Tom Davis served as the Office Engineer (2nd in charge) in the on-site office for the general contractor, Blount Brothers Construction, Inc. He joined the site team early in the civil phase and stayed on the job until after startup of all systems and the final inspection.

The project was built by Jefferson County, Alabama with a federal grant and funding from state and county.  

One of DAC's principals served as the Coordinating Engineer of the on-site construction management team of 35 managers, administrators and inspectors. The 69th Complex was built by 23 seperate contracts on only 44 acres near downtown Houston on the banks of Buffalo Bayou. The plants capacity is 200 MGD and 400 MGD peak hydraulic flow. The construction cost was $245,000,000.

The contracts were built using three federal grants with the remaining funding from state and local agencies. 

Unique features of this project included:

• an on-site oxygen generation plant;
  
• enclosed aeration basins to contain the oxygen rich air space;
  
• mix-media final effluent filtration;
  
• sixteen 180-foot diameter clarifiers;
  
• sludge drying facility;
  
• barge loading dock for dried sludge; and a
  
• distributed digital control system. 

69th St. WWTP & Sludge Drying Facility

The orginal terminals A & B at Bush Intercontinental Airport Houston were renovated after asbestos abatement. The renovation included complete upgrade of the HVAC systems in the public and airline spaces along with chill water and air systems in the tunnel connecting the terminals. The work also completely refinished the inside of the concourses leading to the Flight Stations, replacement of the ceiling and flooring in the Flight Stations and the HVAC and ceilings in the airline service areas below. 

The grass-roots 69th Street Treatment Facility includes an an award winning office and laborary facility that provided conference rooms, special climate controled computer and process control rooms and a laborary with advance testing equipment.

The grass-roots 69th Street Treatment Facility includes an an award winning office and laborary facility that provides conference rooms, special climate controled computer and process control rooms and a laborary with advance testing equipment. The single level structure was on the third level over two levels of process tanks. Cost - $15,000,000 plus computer, Honeywell process digital controller, furnishings and lab equipment.

The project was built using a federal grant with the remaining funding from state and local agencies.