EHRA Engineering is driving progress with Harris County Precinct 3 through a major infrastructure transformation on Treaschwig Road. The two-lane asphalt road with open ditches is now being rebuilt into a four-lane divided concrete roadway with curb and gutter, designed for community needs and increased safety and mobility.
EHRA is proud to lead the planning, design and execution of the 1.6-mile reconstruction project from west of Aldine-Westfield Road to east of Birnam Wood Boulevard. The upgraded corridor includes a 32-foot median, a 5-foot sidewalk, a conventional storm sewer system and a wet-bottom detention pond. EHRA’s multi-disciplinary team brought together expertise in roadway and drainage design, traffic control, stormwater management and delivering bid-ready documents for construction.
The project went through a redesign phase after changing precincts, which included removing Low Impact Development (LID) features due to maintenance concerns, updating cross slope from center median bioswale drainage to conventional cross slope to outside gutters, updating to current county standards and extending the western project limits. It was also divided into two phases at Cypress Creek to streamline implementation. The EHRA team worked diligently with the County to expedite the design due to the importance of the project.
One major change requested by the County was to replace, rather than widen, the Cypress Creek bridge. EHRA performed a detailed hydraulic analysis to design a seven-span, four-lane bridge that meets modern Atlas 14 rainfall standards. The piers were strategically placed within the hydraulic shadow of the existing bridge to minimize environmental disruption, while ensuring better flood resilience.
More than a road widening, Treaschwig Road serves as an important connector to several major thoroughfares. The corridor connects to Mercer Botanical Gardens, one of the county’s most visited parks, and runs adjacent to a future equestrian trail. EHRA integrated thoughtful community-oriented features such as doubling the wet-bottom detention pond as a public-access horse-washing station and the new bridge that accommodates a 10-foot-wide pedestrian trail and a 6-foot-wide equestrian trail underneath preparing for future amenities to the Community.
Precinct 3 Commissioner Tom Ramsey highlighted, “EHRA was selected for this project because we need someone that understands all of the factors…It’s really the ability to bring a multi-faceted approach in terms of expertise to a project, and ultimately I think we receive the benefit.”
Construction is underway for Treaschwig Phase 1 from Aldine- Westfield Road to west of Cypress Creek and the County is planning to bid Phase 2 from Cypress Creek to west of Birnam Wood Boulevard in the upcoming months. Once complete, the project will improve regional mobility and support continued growth in the area. This leads to a safer, more efficient thoroughfare that enhances quality of life for surrounding neighborhoods and respects the natural and recreational character of the area.
With construction moving forward, Treaschwig Road is more than just pavement—it's progress, purpose and partnership in motion.
