

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.
EHRA was selected by the client to provide engineering design and to serve as District Engineer for the 2,400 acre Towne Lake Development. Our survey department retraced the overall boundary and performed a topographic survey of the site.
The facility features an activated sludge process system. Additionally, the facility is equipped with an emergency standby diesel generator.
EHRA designed an expansion that implemented the installation of a new triplex lift station operating in conjunction with the existing duplex lift station.
Engineering design and construction phase services of water, sewer, drainage and paving for four subdivision sections and off-site channel (123 acres out of a 400 acre subdivision). There was 60-feet of elevation difference on this site and wooded lots were left in their natural state which required the installation of retaining walls.
The Houston Ship Channel is a busy place, and widening the Sam Houston Tollway will require new twin bridges across the Houston Ship Channel.The main span of each of the cable-stayed bridges will be 1,320 ft, and they will provide four toll lanes and full shoulders in both directions. One of the largest challenges is the coordination of the construction processes amid 120 major utility pipelines and bustling UPRR and PTRA rail lines at one of the country’s busiest seaports, says Mike Perez, Harris County Toll Road Authority senior staff engineer. Another challenge is poor soils at the site, which will require the drill shafts for pylons to be more than 200 ft deep, he says.
Source: http://enr.com