|Location||Garland and Montgomery counties, Arkansas|
|Primary inflows||Ouachita River|
|Primary outflows||Ouachita River|
|Basin countries||United States|
|Surface area||40,000 acres (16,000 ha)|
|Average depth||Avg 50 ft (15 m)|
|Max. depth||200 ft (61 m)|
|Shore length1||690 mi (1,110 km)|
|Frozen||Does not freeze|
|1 Shore length is not a well-defined measure.|
Lake Ouachita (Pronounced WAH-shi-tah) is a reservoir created by the damming of the Ouachita River by Blakely Mountain Dam ().
A reservoir is, most commonly, an enlarged natural or artificial lake, pond or impoundment created using a dam or lock to store water.
The Ouachita River is a 605-mile-long (974 km) river that runs south and east through the U.S. states of Arkansas and Louisiana, joining the Tensas River to form the Black River near Jonesville, Louisiana. It is the 25th-longest river in the United States.
Blakely Mountain Dam was built by the United States Army Corps of Engineers from 1948 to 1953 for hydroelectric power, recreation, water supply and wildlife conservation.The dam is 231 feet tall, 1,100 feet long at the crest, and is capable of 75 megawatts.
The United States Army Corps of Engineers (USACE) is a U.S. federal agency under the Department of Defense and a major Army command made up of some 37,000 civilian and military personnel, making it one of the world's largest public engineering, design, and construction management agencies. Although generally associated with dams, canals and flood protection in the United States, USACE is involved in a wide range of public works throughout the world. The Corps of Engineers provides outdoor recreation opportunities to the public, and provides 24% of U.S. hydropower capacity.
The lake is located near Hot Springs, Arkansas. Lake Ouachita is the largest lake completely in Arkansas, as the larger [ citation needed ] Bull Shoals Lake extends into Missouri. Lake Ouachita has over 690 miles (1,110 km) of shoreline and over 66,324 acres (26,840 ha) of water. It is completely surrounded by the Ouachita National Forest. Lake Ouachita is located near two other lakes, Lake Hamilton and Lake Catherine. These three lakes, DeGray Lake to the near south, and the thermal springs of Hot Springs National Park make Hot Springs a popular tourist getaway.
Hot Springs is a city in the state of Arkansas and the county seat of Garland County. The city is located in the Ouachita Mountains among the U.S. Interior Highlands, and is set among several natural hot springs for which the city is named. As of the 2010 United States Census, the city had a population of 35,193. In 2017 the estimated population was 36,915.
Arkansas is a state in the southern region of the United States, home to over 3 million people as of 2018. Its name is of Siouan derivation from the language of the Osage denoting their related kin, the Quapaw Indians. The state's diverse geography ranges from the mountainous regions of the Ozark and the Ouachita Mountains, which make up the U.S. Interior Highlands, to the densely forested land in the south known as the Arkansas Timberlands, to the eastern lowlands along the Mississippi River and the Arkansas Delta.
Largemouth Bass, Small Mouth Bass, Spotted Bass, Bream, Crappie, Catfish, Walleye and world class Trophy Striped Bass await the angler. Lake Ouachita is known as the Striped Bass Capital of the World. Lake Ouachita has many unusual features. One feature by the Corps of Engineers is the Geo-Float Trail, a marked trail which can be followed with a brochure which details prominent geologic features along the route.
Lake Ouachita also features one of the largest crystal veins in the world. Lake Ouachita has rare jellyfish (non-stinging) and sponges found in only very few of the cleanest freshwater lakes.
Jellyfish or sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a few are not mobile, being anchored to the seabed by stalks. The bell can pulsate to provide propulsion and highly efficient locomotion. The tentacles are armed with stinging cells and may be used to capture prey and defend against predators. Jellyfish have a complex life cycle; the medusa is normally the sexual phase, the planula larva can disperse widely and is followed by a sedentary polyp phase.
Sponges, the members of the phylum Porifera, are a basal Metazoa (animal) clade as a sister of the Diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. The branch of zoology that studies sponges is known as spongiology.
Scuba divers from all over the world enjoy the underwater experience as well as the special spear fishing season. The original purpose of Lake Ouachita was flood control and hydroelectricity.
Scuba diving is a mode of underwater diving where the diver uses a self-contained underwater breathing apparatus (scuba), which is completely independent of surface supply, to breathe underwater. Scuba divers carry their own source of breathing gas, usually compressed air, allowing them greater independence and freedom of movement than surface-supplied divers, and longer underwater endurance than breath-hold divers. Although the use of compressed air is common, a new mixture called enriched air (Nitrox) has been gaining popularity due to its benefit of reduced nitrogen intake during repetitive dives. Open circuit scuba systems discharge the breathing gas into the environment as it is exhaled, and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver through a regulator. They may include additional cylinders for range extension, decompression gas or emergency breathing gas. Closed-circuit or semi-closed circuit rebreather scuba systems allow recycling of exhaled gases. The volume of gas used is reduced compared to that of open circuit, so a smaller cylinder or cylinders may be used for an equivalent dive duration. Rebreathers extend the time spent underwater compared to open circuit for the same gas consumption; they produce fewer bubbles and less noise than open circuit scuba which makes them attractive to covert military divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference.
Another topic of debate is the vegetation that covers 10% of the lake. Lake Ouachita's vegetation is being addressed by the U.S. Army Corps of Engineers, the Arkansas Game and Fish Commission, and the Lake Ouachita Association to control the hydrilla and Eurasian watermilfoil. The goal of the project is to contain and reduce — not to eradicate — the vegetation, since the presence of aquatic vegetation in moderate amounts is beneficial to the lake's fishery. Treatment will be concentrated on high recreational use areas, such as swimming beaches, around marinas and popular boating areas. Areas of the lake containing good fishery habitat will not be treated.
Hydrilla (Waterthyme) is a genus of aquatic plant, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species. It is native to the cool and warm waters of the Old World in Asia, Africa and Australia, with a sparse, scattered distribution; in Australia from Northern Territory, Queensland, and New South Wales.
Myriophyllum spicatum is native to Europe, Asia, and north Africa, but has a wide geographic and climatic distribution among some 57 countries, extending from northern Canada to South Africa. It is a submerged aquatic plant, grows in still or slow-moving water, and is considered to be a highly invasive species.
Mountain Pine is a city in Garland County, Arkansas, United States. It is part of the Hot Springs Metropolitan Statistical Area. The population was 770 at the 2010 United States Census. It is located immediately southeast of Lake Ouachita below the Blakely Mountain Dam. The city consists of five defined neighborhoods, Pinewood (north), South Mountain Pine, a business district, Cozy Acres (southwest) and Mountain View/Timberland area.
Bull Shoals Lake is an artificial lake or reservoir in the Ozark Mountains of northern Arkansas and southern Missouri. It has hundreds of miles of lake arms and coves, and common activities include boating, water sports, swimming, and fishing. Nineteen developed parks around the shoreline provide campgrounds, boat launches, swim areas, and marinas.
Beaver Lake is a man-made reservoir in the Ozark Mountains of Northwest Arkansas and is formed by a dam across the White River. Beaver Lake has some 487 miles (784 km) of shoreline. With towering limestone bluffs, natural caves, and a wide variety of trees and flowering shrubs, it is a popular tourist destination. Beaver Lake is the source of drinking water in Northwest Arkansas, which is managed, treated and sold by Beaver Water District.
Keystone Lake is a reservoir in northeastern Oklahoma on the Arkansas and Cimarron rivers. It is located upstream about 23 miles (37 km) from Tulsa. It was created in 1968 when the Keystone Dam was completed. The primary purposes are: flood control, hydroelectric power generation, wildlife management and recreation.
Claytor Lake in Pulaski County, Virginia, is a 4,472-acre (1,810 ha), 21-mile-long (34 km) reservoir on the New River, created for an Appalachian Power Company hydroelectric project. It is named for W. Graham Claytor, Sr. (1886–1971) of Roanoke, Virginia, a vice president of Appalachian Power who had supervised the construction of the Claytor Dam, which created the lake.
Pinnacle Mountain State Park is a 2,356-acre state park located in Pulaski County, Arkansas just outside of Little Rock. The main attraction is Pinnacle Mountain, an iconic landmark surrounded by the bottomlands of the Big Maumelle and Little Maumelle rivers.
Lake Georgetown is a reservoir on the north fork of the San Gabriel River in central Texas in the United States. Lake Georgetown is a U.S. Army Corps of Engineers reservoir formed on the San Gabriel by the North San Gabriel Dam, which is located about three miles west of Georgetown, Texas. The dam, lake, and all adjacent property are managed by the Fort Worth District of the U.S. Army Corps of Engineers. The dam was officially completed on October 5, 1979, and serves to provide flood control for the community of Georgetown. Lake Georgetown is also a source of drinking water for Georgetown and the nearby city of Round Rock. The lake is also a popular recreational destination.
Narrows Dam is a dam located 6 miles north of Murfreesboro, Arkansas, that impounds the water of the Little Missouri River (Arkansas) to create Lake Greeson. Narrows Dam was authorized as a flood control and hydroelectric power project by the Flood Control Act of 1941. The dam is a feature of the comprehensive plan for the Ouachita River Basin. Lake Greeson is operated for hydroelectric power, recreation, and flood control.
Lake Dardanelle is a major reservoir on the Arkansas River in Arkansas, USA. and is an integral part of the McClellan-Kerr Arkansas River Navigation System (MKARNS), which allows barge transportation from the Mississippi River to the Tulsa Port of Catoosa in northeastern Oklahoma. MKARNS went into service along its full length in 1971.
Lake Hamilton and Lake Catherine are a pair of man-made lakes around Hot Springs, Arkansas. The two lakes have greatly improved the tourism in Hot Springs. Both Lakes were created by Arkansas Power & Light.
Nimrod Lake is a reservoir in western Arkansas, created by the construction of the Nimrod Dam. It is the oldest Corps of Engineers project in Arkansas, and was completed in 1942 on the Fourche LaFave River.
Pine Flat Lake is an artificial lake or reservoir in the Sierra Nevada foothills of eastern Fresno County, California on the western north-south border to the Sierra- and Sequoia National Forests, about 30 mi (48 km) east of Fresno. The lake is managed by the U.S. Army Corps of Engineers (USACE) and is open to boaters, campers & hikers.
Kettle Creek State Park is a 1,793-acre (726 ha) Pennsylvania state park in Leidy Township, Clinton County, Pennsylvania in the United States. The park is in a valley and is surrounded by mountains and wilderness. It features the Alvin R. Bush Dam built in 1961 by the U.S. Army Corps of Engineers as a flood control measure in the West Branch Susquehanna River basin. Many of the recreational facilities at the park were built during the Great Depression by the young men of the Civilian Conservation Corps. Kettle Creek State Park is seven miles (10 km) north of Westport and Pennsylvania Route 120. It is largely surrounded by Sproul State Forest.
Lake Marion is the largest lake in South Carolina, centrally located and with territory within five counties. The lake is referred to as South Carolina's inland sea. It has a 315-mile (507 km) shoreline and covers nearly 110,000 acres of rolling farmlands, former marshes, and river valley landscape.
Robert S. Kerr Reservoir is located within the Cookson Hills, on the Arkansas River in Sequoyah, Le Flore, Haskell, and Muskogee counties in eastern Oklahoma, US. It is about eight miles south of the nearest major town, Sallisaw, Oklahoma. The reservoir is impounded by Robert S. Kerr Lock and Dam at river mile 336.2 on the Arkansas River, just a few miles below its confluence with the Canadian River. The lock and dam are part of the McClellan-Kerr Arkansas River Navigation System, which provides for barge navigation on the Arkansas River and some of its tributaries. The U.S. Army Corps of Engineers maintains the locks and navigation system.
Winthrop Rockefeller Lake is an impounded section of the Arkansas River, named for Governor Winthrop A. Rockefeller (1912–1973). It extends almost 30 miles (50 km) along the river, from the Arthur V. Ormond Lock and Dam below Mile 177 near Morrilton, to the Dardanelle Lock and Dam above Mile 205 near Dardanelle. Lake Dardanelle begins immediately above Rockefeller Lake.
Rodman Reservoir, or Lake Ocklawaha, is an artificial reservoir located on the Ocklawaha River in Putnam County and Marion County in north central Florida. The reservoir, located about 15 miles southwest of Palatka, is approximately 15 miles in length, covers 9,500 acres and is located between State Road 19 on the east and State Road 315 on the west.  It is also a premier largemouth bass fishery for Northeast Florida.
Womble Trail, located in the Ouachita National Forest in western Arkansas, United States, is a singletrack path running more than 37 miles from North Fork Lake to the Ouachita National Recreation Trail. The U.S. Forest Service trail is open for use by mountain bikers and hikers. Horses are not allowed. The nearest towns are Mount Ida and Oden.
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