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Markets
Water
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Location
Clark County, Nevada, USA
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Client
Clark County Regional Flood Control District
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Completion date
Ongoing
Taylor Wright
VP, Principal Business Development Director, Atlanta, GA, USA contact form+1 678 247 2425
Some of the most severe flash floods occur in the desert. In the 70-year span between 1905 and 1975, The U.S. Soil Conservation Service documented 184 distinct flood events in Clark County, Nevada that resulted in damages to private and public property. The Clark County Regional Flood Control District (CCRFCD), est. 1985, is responsible for developing and implementing comprehensive flood control master plans for the county.
We have completed the consultant-led updates to flood control master plan for the Las Vegas Valley since 1997. Individual flood control plans must be reviewed every five years, and the master plan must be continuously updated to assess progress, identify obstacles and to recommend changes needed due to growth and development of the area. Over time, the master plan has evolved into a technical tool for guiding local governmental agencies and private consultants in the development of both public and private property.
The master plan update process includes data collection, updating land use data, determining hydrologic modeling parameters using GIS capabilities, updating hydrologic models, updating the flood control facilities inventory in a GIS geodatabase, making master plan facility recommendations, and estimating facility construction costs.
To support this process, we developed a hydrologic model of over 1,500-square miles, which defines accurate 100-year peak flows and volumes for the entire valley. We also created an Arc hydro geodatabase to represent valley watersheds and associated regional flood control facilities, serving as the foundation for associated modeling efforts. A custom suite of GIS tools was also developed to facilitate the continuous update/maintenance of the master plan.
For data-driven forecasting and planning, the team created an automated cost estimation tool to predict the future costs of flood control facilities. The tool exports data back into the database summarizing the costs of all facilities in the region while tracking flood control infrastructure and the maintenance costs.
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