on this page

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.

DISCLAIMER

Please note that you are now leaving the AtkinsRéalis website (legal name: AtkinsRéalis Group inc.) and entering a website maintained by a third party (the "External Website") and that you do so at your own risk.

AtkinsRéalis has no control over the External Website, any data or other content contained therein or any additional linked websites. The link to the External Website is provided for convenience purposes only. By clicking "Accept" you acknowledge and agree that AtkinsRéalis is not responsible, and does not accept or assume any responsibility or liability whatsoever for the data protection policy, the content, the data or the technical operation of the External Website and/or any linked websites and that AtkinsRéalis is not liable for the terms and conditions (or terms of use) of the External Website. Further, you acknowledge and agree that you assume all risks resulting from entering and/or using the External Website and/or any linked websites.

BY ENTERING THE EXTERNAL WEBSITE, YOU ALSO ACKNOWLEDGE AND AGREE THAT YOU COMPLETELY AND IRREVOCABLY WAIVE ANY AND ALL RIGHTS AND CLAIMS AGAINST ATKINSRÉALIS, AND RELEASE, DISCHARGE, INDEMNIFY AND HOLD HARMLESS ATKINSRÉALIS, ITS OFFICERS, EMPLOYEES, DIRECTORS AND AGENTS FROM ANY AND ALL LIABILITY INCLUDING BUT NOT LIMITED TO LIABILITY FOR LOSS, DAMAGES, EXPENSES AND COSTS ARISING OUT OF OR IN CONNECTION WITH ENTERING AND/OR USING THE EXTERNAL WEBSITE AND/OR ANY LINKED WEBSITES AND ANY DATA AND/OR CONTENT CONTAINED THEREIN.

Such waiver and release specifically includes, without limitation, any and all rights and claims pertaining to reliance on the data or content of the External Website, or claims pertaining to the processing of personal data, including but not limited to any rights under any applicable data protection statute. You also recognize by clicking “Accept” that the terms of this disclaimer are reasonable.

The information provided by Virtua Research cited herein is provided “as is” and “as available” without warranty of any kind. Use of any Virtua Research data is at a user’s own risk and Virtua Research disclaims any liability for use of the Virtua Research data. Although the information is obtained or compiled from reliable sources Virtua Research neither can nor does guarantee or make any representation or warranty, either express or implied, as to the accuracy, validity, sequence, timeliness, completeness or continued availability of any information or data, including third-party content, made available herein. In no event shall Virtua Research be liable for any decision made or action or inaction taken in reliance on any information or data, including third-party content. Virtua Research further explicitly disclaims, to the fullest extent permitted by applicable law, any warranty of any kind, whether express or implied, including warranties of merchantability, fitness for a particular purpose and non-infringement.

The consensus estimate provided by Virtua Research is based on estimates, forecasts and predictions made by third party financial analysts, as described above. It is not prepared based on information provided by AtkinsRéalis and can only be seen as a consensus view on AtkinsRéalis' possible future results from an outside perspective. AtkinsRéalis has not provided input on these forecasts, except by referring to past publicly disclosed information. AtkinsRéalis does not accept any responsibility for the quality or accuracy of any individual or average of forecasts or estimates. This web page contains forward-looking statements based on current assumptions and forecasts made by third parties. Various known and unknown risks, uncertainties and other factors could lead to material differences between AtkinsRéalis' actual future results, financial situation, development or performance, and the estimates given here.



Downloads

Trade releases

Explore further