• Harris County, Texas


  • Harris County Engineering Department


The Pine Trails Subdivision located in Harris County, Texas consists of approximately 1,800 residential homes.  During Hurricane Harvey, approximately 264 homes within the subdivision were reported to have flooded.  The primary purpose of the project was to evaluate the existing storm sewer system and provide solutions to reduce overall flood risk for the neighborhood.

CobbFendley developed a study report which provided recommendations to upsize critical portions of the storm sewer system and inlets, replace six (6) outfalls, and construct three (3) new detention ponds.  CobbFendley and its consultants provided multiple drainage models, anticipated drainage benefits, and their associated costs.  The study report also provided recommendations regarding environmental, geotechnical, utility conflicts, ROW encroachments, tree protection and other design consideration.  CobbFendley provided the study, design, and bid phases, including civil engineering, topographical and boundary surveying, geotechnical, subsurface utility engineering (SUE) and utility coordination to develop the construction plans, specifications and estimate (PS&E) package for the project.

The project was divided into 4 phases totaling an estimated $50 million for construction.  The project upsizes approximately 70% of the existing drainage infrastructure within the subdivision.  In addition to the drainage improvements, the project will provide for the replacement of approximately 7 miles of concrete street replacement, 15 miles of sidewalk replacement, and new ADA compliant curb ramps throughout the subdivision.  CobbFendley evaluated the remainder of the existing sidewalk within the neighborhood to provide sidewalk point repair plans in order to increase overall pedestrian mobility and safety.