SH 99 (Grand Parkway) Segment E

Client: Texas Department of Transportation (TxDOT)

Location: Harris County, Texas


The Grand Parkway is a planned 180-mile new location loop around the Greater Houston metropolitan area. The total cost of this loop is estimated to be $3.7 billion.

OTHON prepared engineering and plans, specifications and estimate (PS&E) for the following design elements.

  • Complex Highway and Retaining Wall Design;
  • Cross Section and Earthwork Design;
  • Utility Coordination and Design;
  • Signing, Pavement Markings and Traffic Control Plans;
  • Hydrology and Hydraulic Analysis and Design;
  • Storm Water Pollution Prevention Plan and Permits;
  • Construction Scheduling;
  • Summary of Quantities and Construction Cost Estimates.


OTHON's Scope

  • Roadway Design
  • Retaining Wall Design
  • Drainage Design
  • Grading and Pave Design
  • Utility Coordination
  • Construction Sequencing
  • Traffic Control
  • Signing
  • Pavement Marking
  • Cost Estimates