City flooding and drainage problems are key issues when planning for the safety, health and quality of life for Grand Prairie citizens. As part of the City-Wide Drainage Master Plan the city has engaged consultants to prepare state of the art drainage studies for flood prone areas of the city and to recommend future Capital Improvement Plan (CIP) projects to alleviate flooding.

City-Wide Internal Storm Drain Master Plan Study (March 2015)

The city had Halff Associates, Inc. study and determine the level of service of its storm drainage systems north of Joe Pool Lake using the StormCAD software program provided by Bentley and recommend future CIP projects.

View and download report and exhibits.

Cottonwood and Lakeview Watershed Internal Storm Drain Master Plan Study (November 2012)

 Five flood prone hot spot areas were studied using the state of the art two dimensional (2D) hydrodynamic modeling program by Innovyze called InfoWorks SD 2D. A detailed fine mesh 2D study was performed by five separate consultants, each assigned to one of the hot spot areas. Overall management and coordinate of the studies was performed by Lockwood, Andrews & Newnam, Inc.. The studies used City detailed storm drainage as-built plans, limited field surveys and were performed in compliance with the City 2010 Drainage Design Manual and the City of Grand Prairie Technical Modeling Standards for Watershed Wide Storm Drain Master Plans Using InfoWorks SD, December 2012. The storm drains of the remaining area of the Cottonwood Creek and Lakeview watershed were analyzed by Halff Associates, Inc. using the StormCAD modeling program by Bentley.

View and download report and exhibits.

Fish Creek Watershed Internal Storm Drain Master Plan Study (July 18, 2013)

Three hot spot flood prone areas were studied in detail using the 2D hydrodynamic modeling program by Innovyze called InfoWorks SD 2D. A detailed fine mesh 2D study was performed by Lockwood, Andrews & Newnam, Inc. using City detailed storm drainage as-built plans, limited field surveys and performed in compliance with the City 2010 Drainage Design Manual and the City of Grand Prairie Technical Modeling Standards for Watershed Wide Storm Drain Master Plans Using InfoWorks SD, December 2012.

View and download report and exhibits.

City-Wide Potential Overland Flow Accumulation Maps

 This study was part of the city contract Master Plan Study Update, Drainage Problem Area Assessment and Neighborhood Flooding Study with McKim & Creed, Inc..

A City Wide potential stormwater runoff accumulation study was performed by McKim & Creed, Inc. in May 2017 using rain on mesh 2D hydrodynamic modeling with the program by Innovyze called ICM. City storm drains and field surveys were not including in the modeling so this flood definition is to be used, together with other detailed studies of the storm drainage systems and creek and river floodplains, as a planning tool only to determine areas of potential flooding for various frequency storms.

View and download the Technical Memorandum and Map Exhibits.