![]() ![]() Please see the questions “Do Little Rock District engineers make release decisions based on rainfall forecast?” or “What is seasonal pool?” for more information on related topics. Released water could negatively impact downstream stakeholders. Pre-releasing for additional storage in conservation pool is also not a consideration for flood risk management conservation storage belongs to hydropower and water supply users. ![]() However, Little Rock District does not make release decisions based on a rain forecast. Little Rock District aggressively releases water from flood pool as soon as downstream conditions allow. The answer depends on how the idea of pre-release is defined. Does Little Rock District make pre-releases? The district is watching the state of the forecasting science for future developments that may make operating to forecast possible for our region. In some parts of the country, current forecast accuracy combined with the configuration of lakes and the topography have presented conditions where release decisions can account for rainfall forecasts. Rainfall forecasts can be inaccurate in terms of rainfall amount and location. If the district had made pre-releases based on forecast those releases would have made flooding worse along the White River from Branson, MO to the river’s confluence with the Mississippi. Instead of Beaver Lake Table Rock, Norfork, and Bull Shoals Lakes received near record inflows from the storm. The storm produced rainfall similar to the NWS forecast, but was centered about 100 miles northeast of where predicted (near Cabool, Missouri). Based on the National Weather Service (NWS) rainfall forecast, engineers forecasted record releases from Beaver Dam. A historic rainfall was predicted over Northwest Arkansas. One chilling example of why Little Rock District does not prerelease happened in the spring of 2017. There are two common undesirable outcomes of operating to forecast: first, is the loss of conservation water and second, is the inducing of additional flooding downstream. Rainfall forecasts for the region have not achieved the required accuracy to safely operate to rainfall forecast. No, Little Rock District does NOT make lake release decision based on rainfall forecasts. Do Little Rock District engineers make release decisions based on rainfall forecast? The app can be found by searching “USACE Little Rock” in the Google Play Store or the Apple App Store. Where do I find operational data about my favorite Little Rock District lake? There you can search by name or use an interactive map to find a dam and some basic information about a dam’s owner, size, hazard potential, and responsible government agency. ![]() The National Data Base of Large Dams is available at .mil. There is a large lake near me, how do I learn whom is responsible for its operation? Lakes in the Ouachita Basin are operated by Vicksburg District. The Corps of Engineers is organized by river basins. Major River Basins in Little Rock District Why are some US Army Corps of Engineers Lakes in Arkansas not operated by Little Rock District? The Rolling Fork, Cossatot, and Saline Rivers empty into the Little River, which drains into Millwood Lake.įigure 1. DeQueen Lake is on the Rolling Fork River. There are 12 locks and dams on the Arkansas River (including the Arkansas Post Canal) and one lock and dam on the White River. The Petit Jean and Fourche La Fave Rivers drain into the Arkansas River. Nimrod Lake is on the Fourche La Fave River. Blue Mountain Lake is on the Petit Jean River. Army Corps of Engineers, Memphis District and empties into the Mississippi River. Greers Ferry Lake is on the Little Red River which flows into the White River near Georgetown, Arkansas. Clearwater Lake is in the Black River Basin and the Black River drains into the White River near Newport, Arkansas. In the White River Basin: Beaver, Table Rock, and Bull Shoals Lakes are on the main stem of the White River Norfork Lake is on the North Fork of the White River (North Fork River) which flows into the White River downstream of Bulls Shoals Lake. Little Rock District operates lakes in the White, Arkansas, and Little River Basins. ![]() What lakes are operated by Little Rock District? ![]()
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