League Line

EHRA performed preliminary drainage area delineations for nine creek crossings and calculated approximate 100-year flows for each culvert crossing. Culvert structures were sized for each of the six crossings, ranging from 48” round pipe culverts up to dual 5’x5’ box culverts.

Northpark Drive Mobility Project

EHRA completed preliminary engineering, phase one environmental site assessment and schematic development for the widening of Northpark Dr. between US 59 and Woodland Hills Dr. EHRA also provided program management, drainage analysis and design, traffic engineering, environmental documentation and schematic design for the roadway, as well as grade separation at the Loop 494/UPRR railroad crossing.

EHRA conducted traffic operations and access management studies for the Northpark Dr. corridor. This corridor is approximately 2.2 miles long and has major signalized and unsignalized intersections and driveways that access various subdivisions and industrial developments. These studies laid the groundwork for the widening of Northpark Dr. from a four-lane boulevard cross-section to a six-lane boulevard complete street. The new street design includes low impact development drainage, conventional drainage, a grade separation at the UPRR crossing with mechanically stabilized earth retaining walls, two at-grade crossings for bi-directional frontage access, reconstruction of two concrete bridges over a diversion channel, intersection improvements, a roadway-adjacent multiuse path and traffic signal improvements.

Drainage analysis and design included hydrologic and hydraulic studies of both existing and proposed conditions to demonstrate that proposed project components would not adversely affect the 100-year floodplain in the area. The roadway and traffic designs contained horizontal and vertical alignments, cross-sections, plan and profile, sidewalk and bicycle accommodations, intersection layouts, traffic control plans and signing and pavement markings.

As the program management firm, EHRA coordinated with TxDOT, UPRR, the City of Houston Council District E, COH Planning and Development Department, COH Public Works and Engineering Department, Montgomery County, Harris County, HCFCD and area residents throughout the project.

Cane Island Parkway

The new roadway design comprises of one-half major thoroughfare, conventional drainage, a 600-ft long bridge over Willow Fork Bayou, Retaining walls and intersection improvements at FM 1463 (including traffic signals and illumination).

MUD 188

EHRA planners, hydrologists and landscape architects worked together to propose an alternative use for the space, re-developing the basin into an amenity pond. EHRA carefully selected native plant materials for both their ability to survive in the harsh conditions of the basin as well as providing filtration for improved storm water quality.

Greens Bayou Trail Phase 2

Identified as a top priority during the development of the District’s Parks Master Plan, this portion of trail was the first phase of over two miles of planned trails to provide connectivity and recreation for District residents.

22 March 2023

Project InFocus: Raburn Reserve

Kevin M. Reidy, RPLS

The EHRA Engineering survey team is currently partnering with Hines Development on a 110+-acre single family development in the Tomball area of Greater Houston known as Raburn Reserve. The EHRA survey team verified the boundary of a 105-acre tract that Hines purchased and subsequently conducted a topographic survey utilizing the latest drone technology.

This project was particularly unique and intricate from the perspective that, in addition to EHRA, multiple different planning, engineering and surveying companies contributed to this project on several components and at and various stages of project development. At first, another survey company completed the land title survey for the acquisition of the tract of land that would become Raburn Reserve. Simultaneously, the City of Tomball contracted an additional survey company to conduct a route survey for the future Medical Complex Drive that would bisect the Raburn Reserve tract near its southern portion.

As the Raburn Reserve tract of land was part of a subdivision plat laid out in the early 1900s, and because many survey companies and stakeholders were involved, boundary resolution proved especially challenging. This reality became abundantly clear when the proposed right-of-way for Medical Complex Drive surveyed did not correspond with the boundary of the Raburn property. To rectify this five-foot discrepancy, EHRA coordinated amongst the companies and with the City of Tomball. After a few discussions with all invested parties, EHRA was successful in establishing full agreement on the boundary solution.

Furthermore, the land plan for Raburn Reserve was originally developed by a different planning and engineering firm. By the time EHRA entered the picture, that firm already both submitted the first plat to the City of Tomball and obtained preliminary approval. EHRA reviewed the initial land plan prepared by the previous firm, and our team determined that this plan was not in compliance with the Planned Unit Development (PUD), an agreement between Tomball and Hines Development regarding anticipated lot widths, depths, etc.

Subsequent to this discovery, EHRA promptly revised the land plan, bringing it into alignment with the PUD stipulations. Finally, EHRA submitted the final plat for section one of Raburn Reserve. Since submitting the final plat, the EHRA survey team supported Hines Development as the firm added another five acres to this community. The EHRA Planning & Visioning Department optimized the use of the five additional acres by fitting as many lots as possible.

After resolving early complications and maximizing land use potential, EHRA Engineering has continued to serve as the anchor for this project. Close collaborations with Hines Development have allowed our professionals and engineers to navigate unforeseen hurdles, all while maintaining the budget and the integrity of the project schedule.

SURVEY & MAPPING SERVICES Project In Focus