Providing collaboration between TxDOT and the Harris County Toll Road Authority, BBI met the design challenges …

• Flood Control
• Transportation
• Transportation Planning
• Drainage
• Traffic Engineering
• Roadway Design
• Transportation Structures
• Storm Water

Providing collaboration between TxDOT and the Harris County Toll Road Authority, BBI met the design challenges of the extension of the US 90A/Fort Bend Parkway interchange (northern terminus of the Fort Bend Parkway toll road into Harris County).  The scope of services provided by BBI included design studies, completion of roadway design schematics, field surveys, roadway design, drainage design, and two direct connector bridges.  Both bridges were combination of Type IV prestressed concrete beam/ steel girder structures.  The eastbound connector to US 90A was a 3rd level connector 1859 linear feet (LF) long and the westbound connector to US 90A was a 4th level connector 2137 LF long.

Stormwater runoff was mitigated through the design of multi-cell detention basins within the interchange.

Design challenges included provision for a future depressed section under US 90A by a continuation of the parkway northward and accommodating ongoing final design by TxDOT of the US 90A reconstruction.  Through careful evaluation of the problems and strategic planning, BBI successfully completed the project maintaining consistent traffic control, zero drainage hydraulic impact to the vicinity, and coordination with area transportation organizations.

Engineering Services Provided Include: 

• Design Studies
• Roadway Design Schematics
• Field Surveys
• Roadway Design
• Drainage Design
• Two Direct Connector Bridges

The project was a joint effort between the two owners, TxDOT and the Harris County Tollroad Authority, requiring complex criteria addressed in an effective cost-conscious manner.  BBI strengthens communities through collaboration and by completing projects on-time and within budget.

Ditch “C” Box Culvert System & Turkey Creek Drainage Study at IAH Airport

• Drainage
• Airports

Binkley & Barfield, Inc. (BBI) completed preliminary engineering reports (PER) and the final design for improvements at Bush Intercontinental Airport for the Houston Airport System as a sub-consultant to the prime contractor.

The preliminary reports discussed the Ditch “C” box culvert system replacement and associated tributary storm sewers. The services provided by the BBI team for the  Ditch “C” Box Culvert System included:

• storm water detention analysis
• drainage analysis
• recommendations for drainage improvements in the storm sewer design
• Rerouted service roads
• BBI also prepared plans and specifications for the project.

The PER provided the design analysis and recommendations for a new roadway realignment and also provided for miscellaneous roadway demolition. The reports focused on improvements needed to accommodate the north extension and widening of Runway 15R-33L as well as the construction of new taxiways in the vicinity of the upper reach of Ditch “C”.

Utility conflicts were identified and public utility adjustments were designed for the West Runway Area.

The project scope included 4,000 linear feet of 18-inch to 60-inch diameter storm sewer, 1900 linear feet of 10-foot x 6-foot double box culvert, 2,500 linear feet of service road, and 3,500 linear feet of 10-inch and 12-inch diameter water line relocation for the West Runway Area of Bush Intercontinental Airport for the Houston Airport System.

The BBI Team coordinated its work with the City of Houston Department of Public Works and Engineering, Department of Aviation, and all other consulting engineers, surveyors, and private utility companies.