Clark County Regional Flood Control District
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The Clark County Regional Flood Control District (CCRFCD) was created in 1985 by the Nevada state legislature allowing Clark County to provide broad solutions to flooding problems. The District has developed plans and so far successfully continued working on a fifty year program to eliminate most flooding from a 100-year flood in the populated areas the CCRFCD is responsible for.
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[edit] History
The district began its first project in 1998 funded by a 0.25% sales tax.
As of 2004 approximately $840 million has been spent by the CCRFCD and the US Government on the many projects.
[edit] District direction for providing protection
Since Las Vegas is located in a basin with a single outlet, the Las Vegas Wash, all rain runoff drains to the east side of the basin where it will eventually be deposited into Lake Mead. Rainfall in the surrounding mountain ranges, can cause flooding in the area as water flows off the mountains onto the valley floor. The area is also subject to localized weather events. It is possible for an area to receive heavy rainfall in a short time, while nearby areas as close as one or two miles away receive little or no rain. Additional history about past flood events is available as well as some historical rainfall data.
The increase of hardscape as the valley has developed has contributed to an increase of runoff over time.
To help alleviate the damage caused by flooding, the Clark County Regional Flood Control District has spent millions of dollars to build detention basins and concrete drainage channels throughout the area. The belief is that these structures will control the flow of water when there is storm runoff and reduce flooding in areas below the basins and near the channels and washes.
The detention basins operated by the district vary in size from 10 to 50 acres (4,000 to 20,000 m²) and are up to 50 feet (15 m) deep.
Given the topography of the area, some areas may not be fixable. One example being the Flamingo Wash where the channel overflows into the Imperial Palace parking garage during flash flooding events.
[edit] How growth has affected plans and development
With the rapid growth occurring in the valley, the plan and finances have not been able to keep up. As a result, developers are deciding to build in areas not yet protected by detention basins or other control measures. This is causing many new home buyers to deal with damage or severe runoff on local streets which are used as flood channels when other facilities are not available.
[edit] How weather creates problems
Heavy rain fall can cause localized flash flooding. A thunderstorm hit the northwest part of the city of Las Vegas for two hours in August of 2003, causing some hail damage and considerable water damage. Heavy localized flooding occurred, with property damage reaching into the hundreds of thousands of dollars. In February of 2005 the southwest part of the Vegas Valley was hard hit by flooding from the mountain rain fall runoff. Higher than average precipitation that same winter was responsible for significant damage in Mesquite and Overton which, as of that point in time, had not received much attention since their populations were so much smaller then in the Las Vegas valley area.
[edit] Event detection and notification
In addition to building and maintaining flood control projects, the District also operates a Flood Threat Recognition System of ALERT rain and stream gage, with the cooperation of the U.S. Geological Survey and the National Weather Service. This system collects hydrometeorologic data primarily for the purpose of detecting situations which could cause flooding.
[edit] Major facilities
[edit] Detention basins
- Angel Park Detention Basin
- Anthem Detention Basin
- Black Mountain Detention Basin
- Blue Diamond Detention Basin
- Cheyenne Peaking Basin
- Confluence Detention Basin
- Desert Inn Detention Basin
- East C-1 Detention Basin
- Equestrian Detention Basin
- Fort Apache Detention Basin
- Gowan Central Detention Basin
- Gowan South Detention Basin
- Indian Springs Detention Basin
- Kyle Canyon Detention Basin
- The Lakes Detention Basin
- Lone Mountain Detention Basin
- Lower Duck Creek Detention Basin
- McCullough Hills Detention Basin
- Meadows Detention Basin
- Mission Hills Detention Basin
- Oakey Detention Basin
- Pioneer Detetion Basin
- Pittman East Detention Basin
- Pittman Park Detention Basin
- Red Rock Detention Basin
- R-4 Detention Basin
- Tropicana Wash Detention Basin
- Upper Flamingo Detention Basin
- VanBuskirk Detention Basin
- Vandenberg Detention Basin
- Veterans Detention Basin
- Windmill Wash Detention Basin
[edit] Flood channels
- Beltway Channel
- Duck Creek
- Flamingo Wash
- Halfway Wash
- Naples Channel
- Pittman Wash
- Sloan Channel
