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Last week Dallas' Trinity River remained high after heavy rainfall and flooding in the city and across Texas.

River flooding occurs when rivers rise and overflow their banks, inundating areas that are normally dry. Understanding flood hazards and knowing the actions to take before, during, and afterwards can help you protect your life, the lives of your loved ones, and your property. Prepare by visiting 


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TagsTrinity River, texas flooding, river flooding, stormwater planning, fundin,

Fort Worth residents attended a public meeting Monday June 1, covering the City’s Floodplain Management Plan. The meeting, covered by WFAA News, came after May topped the record books as Texas’ wettest month ever.

Residents discussed needs for improved drainage in areas that flooded during last month’s rain. The public meeting was one of the first steps for the public planning program, led by the City of Fort Worth’s...

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TagsCity of Fort Worth, floodplain plan, floodplain management, flood insurance, stormwater management, fort worth flooding, texas flooding,

Congratulations to Evan Burn (top left), Stormwater, Dallas, who became a Certified Floodplain Manager (CFM), and to Rolando Ayala (top right), Water Resources, Houston, who became a licensed Professional Engineer (P.E.). Rolando joined four others who also received their P.E.s – Olivia Kerss, Transmission and Utilities, Fort Worth, Adam Payne, Construction Services, Dallas, Chris Poteet, Construction Services, Dallas, and Ryan Ramsey, Transmission and Utilities, Fort Worth....

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TagsCFM, PE,

Lesley Brooks, P.E., CFM, ENV SP, Stormwater Engineer in Freese and Nichols’ Dallas office, is presenting at the Association of State Floodplain Managers 2015 Conference, taking place May 31-June 5 in Atlanta. Lesley’s presentation “Water Quality in Your Street Design” will be on Tuesday, June 2 at 11:30 a.m. as part of the ‘Stormwater Case Studies at the Street Level’ track. View her ...

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TagsConferences, ASFPM,

Unsteady HEC-RAS can be a useful tool for modeling complex river systems; however, it can also be more difficult to troubleshoot than steady state models. The model sometimes crashes suddenly and displays a red bar across the computation window stating that the model is “unstable.” Below are some tips to avoid the dreaded “red bar” and for developing a stable running unsteady HEC-RAS model.

  1. Model stability can be sensitive to the computation interval. Lowering the computation interval of your plan file may reduce your error and make the model more stable.
  2. If a drop
  3. ...

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Co-authored by Lesley Brooks

The City of Frisco established a Stormwater Utility Fee (SWUF) in 2009 with the help of Freese and Nichols to offset the increased costs of stormwater management practices, such as maintenance and the cost of capital improvement projects. In 2014, the City asked Freese and Nichols to perform a review of the fee structure and to update the fees to account for increased requirements due to the City’s Phase II MS4. The project also included the development of a SWUF credit system that would allow non-residential properties to reduce their SWUF...

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Tagsstormwater utility fees, SWUF, Frisco,

In 1978, the Carter administration implemented an executive order (EO 11988) that provided standards for Federal projects within a floodplain. Basically, EO 11988 was an attempt to curtail federal projects from being built within the floodplain, with the floodplain being defined by the 100-year flood limits. The 100-year flood limit was established as a mapping limit for insurance purposes, but has evolved over the years to be interpreted by the public as a safety zone, beyond which flooding and the associated dangers are not very likely. Of course we all know and realize, this 100-year...

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Tagsfloodplain, 100-year flood, flood risk management, EO 13690,

Happy Earth Day from the Ebb and Flow Team! We hope you are finding plenty of ways to celebrate the day and all that it stands for.

On May 28, we are hosting a “Creating a Sustainable Community” seminar from 8:30 a.m. to 3:00 p.m. in Dallas. This program will cover sustainability-themed topics related to engineering, planning, reuse and more. We will explore project case studies and industry trends presented by professionals with a diverse range of backgrounds.

Lesley Brooks of our Stormwater Group will present Sustainable Roadways: LID Practices and Complete Streets and also...

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TagsEarth Day, Sustainability, green, stormwater techniques, Seminar,