Texas Department
of Transportation
Houston District

Grand Parkway
Infrastructure, LLC

Roadway / Drainage

Construction Cost
$ 1.3 billion


Project Sheet
pdf (attached project sheet)

SH 99 – Kingwood Road

Chambers, Montgomery, Harris & Liberty Counties, TX

The massive SH 99 Grand Parkway program required that it be divided into numerous design and construction packages to allow timely and cost-effective completion of this much-needed roadway in a fast-growth area north of Houston.

DECON served on the team providing the design of Kingwood Drive and constructing the SH 99 Grand Parkway Segments H, I-1, and I-2, for a total of 52.8 miles spanning four counties. The project encompasses the construction of new lanes and the modernization of the existing tolling infrastructure at an estimated cost of approximately $1.3 billion.

DECON designed the Future #4 (Kingwood) cross street, 1.45 miles (from STA 1772+00 to STA 1849+00), including an additional U-turn on the north side of the new interchange. DECON also designed exit/entrance ramps from/to the SH 99 southbound lane to/from the crossing street, exit/entrance ramps from/to the SH 99 northbound lane to/from the crossing road. The scope included improvements to roadway conditions, modification to drainage structures, SW3P, retaining walls design, a Traffic Control Plan, and signing and marking elements.

DECON also checked proposed structures, box culverts, ditches, and pipes. DECONs work required intense coordination with multiple contractors and numerous design teams on their portion of this vast program.