HOW TO GUIDE: ADDICKS AND BARKER INFORMATIONAL MAPS AND WEBPAGES

Cypress, TX (April 30, 2016) Neighborhoods located on the north and west boundaries of the Addicks and Barker reservoirs are subject to street flooding and home flooding if the reservoirs rise beyond government-owned land.

The Harris County Flood Control District has informational products that can help residents navigate the wealth of information available to them related to:

1)      When streets/roadways in and near the reservoirs might flood;

2)      When the Addicks and Barker outlet gates (to Buffalo Bayou) are open or closed;

3)      Water levels at a “reference point” on Buffalo Bayou;

4)      Determining the ground elevation of streets in neighborhoods near both reservoirs; and

5)      Relating the ground elevation levels to reservoir pool levels to determine when your street or home might flood, in advance of it flooding.

 

HARRIS COUNTY FLOOD WARNING SYSTEM

Residents and businesses near the U.S. Army Corps of Engineer’s Addicks and Barker reservoirs can get current information about stormwater levels in the reservoirs that may impact streets, homes and businesses by using the Harris County Flood Control District’s Flood Warning System (FWS) website and mobile application at www.harriscountyfws.org

What the Pages Show

Along with monitoring rainfall, the FWS pages for Addicks and Barker reservoirs show the status – open or closed – of gates allowing stormwater to flow out of the reservoirs into Buffalo Bayou.

The Addicks page provides “key elevations” for Barker Cypress Road, Eldridge Parkway and State Highway 6 that — when compared to current stormwater elevation readings available on the FWS page – indicate whether road flooding is occurring. The Barker page shows a “key elevation” for Westheimer Parkway.

Both pages also provide links to:

  • Flood Control District news releases about water releases from the reservoirs, as well as about flooded roadways and facilities within the reservoirs.
  • Background information about the Corp’s Addicks and Barker reservoirs and their operation.
  • Flow rates into Buffalo Bayou at the USGS Piney Point Road gage site.

How To Navigate the Flood Warning System’s Addicks and Barker Pages

To check the status of the Addicks and Barker reservoirs at any time, logon to the Flood Control District’s Flood Warning System at www.harriscountyfws.org and follow these steps:

 

  1. Zoom in to the reservoir area on the county-wide map by double-clicking on the map or using the (+) magnification slider in the upper left corner.

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2. Gages (shown as a small boxes lined in red) show recent rainfall for selected time periods, ( e.g. 1 hour, 24 hours etc.)

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3. Mouse over the Addicks Dam Gage 2110 near IH10 and Eldridge Parkway and select “More Information.” On the gage detail page, the “Addicks Gate Status”

is shown in the upper right corner.

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4. Scroll down for additional information – such as stream (reservoir) elevations and flood frequencies – as well as links to other helpful sites.

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Follow similar steps to reach the Barker Dam Gage 2010 and its detail page. That gage is located on the map near IH10 and State Highway 6.

ADDICKS AND BARKER GROUND ELEVATION MAPS

The Harris County Flood Control District has created maps (available at the Flood Control District website https://www.hcfcd.org/flooding-floodplains/addicks-and-barker-reservoirs/) for emergency management officials, the media and the public that show general ground elevations levels of the adjacent lands.

What the Maps Show

The landing page contains a link to a map for Addicks Reservoir and adjacent neighborhoods, and a link to a map for Barker Reservoir and adjacent neighborhoods. Each map shows: 1) the reservoir; 2) the boundary of the reservoir’s “government-owned” land, which indicates the boundary between land within the reservoir owned by the of the U.S. Army Corps of Engineers and the land in the reservoir that is privately owned; 3) five levels of ground elevations (color-coded) in neighborhoods located on the perimeter of the reservoir – ranging from 44.9 to 105 feet; 4) streets and roadways in and near the reservoir; 5) building footprints; and 6) bayous, creeks and tributaries in and near the reservoir.

How To Use the Ground Elevation Maps

Information found on these maps can be used in conjunction with information about the reservoir pool elevations to determine possible impacts to areas outside the reservoirs’ boundaries. Following is a step-by-step guide using a point on the Addicks Reservoir ground elevation map, as an example.

 

  1. Click on the link (mid-page) for the Addicks Reservoir ground elevation map at www.hcfcd.org/flooding-floodplains/addicks-and-barker-reservoirs/

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2. Zoom in to your area. Note the color shaded at your location. For this example, the neighborhood east of the government-owned land near Clay Road is shaded green, which indicates a ground elevation between 104.1-105 feet.

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3. Go to the Harris County FWS gage detail page for Addicks Reservoir and check the current reservoir pool level (approximately 101.7 feet for this example). Subtract the pool elevation from the ground elevation (105 feet – 101.7 feet) and you can estimate that the reservoir has to rise approximately 3 feet before water from the reservoir is in your street.

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Courtesy of the Harris County Flood Control District