Engineering

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Entry Category: Engineering

Baring Cross Bridge

The Baring Cross Bridge is located in downtown Little Rock (Pulaski County) over the Arkansas River at river mile 166.2. It is the western-most bridge of the six bridges spanning the Arkansas River in downtown Little Rock. The first Baring Cross Bridge, the first bridge built across the Arkansas River, opened in 1873. In the 1850s and 1860s, the Cairo and Fulton Railroad Company (C&F) developed two divisions north and south of the Arkansas River. Before the bridge was constructed, the railroad company used ferries to transport equipment, people, animals and commercial freight across the river. Ferries, however, were slow and had a limited amount of cargo space, which caused frequent backups in service. Also, cargo was lost in ferry …

Beaver Dam and Lake

Beaver Lake was created by Beaver Dam in Carroll County. The lake—technically a reservoir since it was created by a manmade dam in order to store water—is located on the White River in the Ozark Highlands region of northwest Arkansas. Approximately seventy-three miles long and a maximum of two miles wide, the lake reaches from Eureka Springs (Carroll County) roughly to Fayetteville (Washington County). About 450 miles of shoreline extend through three counties: Benton, Carroll and Washington. The multi-purpose project provides flood control, hydroelectric generation, water supply, and recreation. While the possibility of a dam on the upper White River was examined as early as 1911, the first feasibility studies by the U.S. Army Corps of Engineers for constructing such …

Blakely Mountain Dam

aka: Blakely Dam
aka: Lake Ouachita
Blakely Mountain Dam, located approximately ten miles northwest of Hot Springs (Garland County), was created to provide hydroelectric power and to control flooding along the Ouachita River. It impounds Lake Ouachita, the largest lake completely within the state of Arkansas at over 40,000 acres. In 1870, the U.S. Congress authorized a survey of the Ouachita River to investigate improving its navigability and preventing floods along its course. However, nothing was done until the 1920s, when Harvey Couch and his company, Arkansas Power and Light (AP&L), began searching for sites for hydroelectric dams along the Ouachita River. AP&L built Remmel Dam and Carpenter Dam, which were in place by the early 1930s. Plans for a third, larger dam were announced in …

Blue Mountain Dam and Lake

Blue Mountain Lake is a manmade lake, or reservoir, on Petit Jean River in Logan County. A portion of the lake extends into Yell County. The dam was built in the 1940s as a flood-control project, but since its completion, the lake has also provided numerous recreational opportunities. It is named for Blue Mountain, an outcropping of Mount Magazine. Land patents on farmland where the lake now lies were granted to William Mobly, James Henard, and Augustus Ward, all in 1861. By 1891, an unincorporated community called Patsie had developed in the area. Several cemeteries had to be relocated during the development of the lake. In 1899, when the Choctaw, Oklahoma and Gulf Railroad was built to the north of …

Bobby Hopper Tunnel

Arkansas has seven railroad tunnels but only one highway tunnel. Named for the Arkansas Highway Commission director at the time of the tunnel’s construction, Bobby Hopper, the northwest Arkansas commission representative from Springdale (Washington County), the Bobby Hopper Tunnel is located on Interstate 49 in Washington County just north of the Crawford County line with its closest exit at Winslow (Washington County). U.S. Highway 71, once classified by Reader’s Digest as “one of the most dangerous highways in America,” includes a perilous stretch between Alma (Crawford County) and Fayetteville (Washington County) through the Ozark Plateau. Thus, construction of an alternate route was designed to make the trip safer, as well as reduce travel time. Approved in 1987 and completed in …

Bridges

At the time Arkansas became a territory, most water crossings were fords. When travelers came to a body of water such as a small river or stream, they would look for the shallowest place and cross there. Generally, these fords were adequate for the small number of early travelers in the territory. But as the population of the state slowly grew and a system of military roads was developed, it became necessary to bridge larger bodies of water to make travel faster and easier for the military and the local population. The first attempts at bridge-building in Arkansas were by private individuals. These individuals applied for a franchise to build a toll bridge, which was granted by the territorial legislature. …

Broadway Bridge

The Broadway Bridge was originally constructed in 1923 as a vehicular structure and replaced in 2017; it is one of six bridges linking the downtown areas of Little Rock (Pulaski County) and North Little Rock (Pulaski County). As the downtown areas of Little Rock and Argenta (present-day North Little Rock) developed in the 1880s, it became apparent that a toll-free bridge independent of the railroad bridges across the Arkansas River was needed. Some people supported the idea of a bridge at the foot of Little Rock’s Main Street, while others thought it should start at Broadway. After years of debate and a series of bridge commissions, the Main Street site was adopted, and the Groton Bridge Company of Groton, New …

Brownlee, Robert

Robert Brownlee was a Scottish stonemason who lived in Little Rock (Pulaski County) from 1837 to 1849. He helped build the first statehouse in Arkansas and several other historic landmarks in Pulaski County. Robert Brownlee was born on April 24, 1813, in Bonkle, Cambusnethan Parish, a tiny community in the Scottish lowlands. He was ninth in a family of seven sons and four daughters born to Margaret and Alexander Brownlee. After a basic education at Murdestoun Estate School near Bonkle, he apprenticed to his older brother, William, a stonecutter. Brownlee was twenty-three when he read about the December 1835 fire that almost destroyed New York City and the need for mechanics to help rebuild the city. That same day, he …

Bull Shoals Dam and Lake

Bull Shoals Dam site is located on the White River about ten miles west of Mountain Home (Baxter County), where the river divides Baxter and Marion counties. The site is named after its location at a shoal (a shallow and swift reach of river), borrowing from the French “Boill,” meaning a large spring. Private power companies had explored the possibility of building a dam at Wildcat Shoals above Cotter (Baxter County) as early as 1902 but never began any work toward it. Congress approved the construction of six reservoirs in the White River Basin in the Flood Control Act of 1938. A U.S. Army Corps of Engineers report in 1930 had recommended the Wildcat Shoals site along with seven others …

Carpenter Dam

aka: Lake Hamilton
Carpenter Dam is the second of three dams constructed along the Ouachita River in the vicinity of Hot Springs (Garland County), following Remmel Dam (completed in 1924) and preceding Blakely Mountain Dam (completed in the 1950s). The concrete gravity dam was built by Arkansas Power and Light (AP&L), which later became Entergy, for purposes of producing hydroelectric power. It impounds the 7,200-acre Lake Hamilton. Carpenter Dam was listed on the National Register of Historic Places on September 4, 1992, in recognition of its role in the growth and development of Hot Springs. Flavius Josephus (Flave) Carpenter, an associate of AP&L president Harvey Couch, selected the site for the construction of Carpenter Dam, ten miles upstream from Remmel Dam, and so …

Cotter Bridge

aka: R. M. Ruthven Bridge
Completed in 1930, the R. M. Ruthven Bridge, originally named and often still called the Cotter Bridge, is located near Cotter (Baxter County) on the business route of U.S. Highway 62 and crosses the White River between Baxter and Marion counties. Recognizable for its Rainbow Arches, it was the first landmark in Arkansas to become a National Historic Civil Engineering Landmark and is one of only a small number of bridges designated as such. East-west travelers through northern Arkansas often encountered problems crossing the White River. Although ferries operated at several places along the river, the river had a tendency to flood rapidly, grounding the ferries and hindering traffic sometimes for several days. The fastest detour was to cross 100 …

Coulter, Wallace Henry

Wallace Henry Coulter was an engineer, inventor, and entrepreneur who was co-founder and chairman of Coulter Corporation, a worldwide medical diagnostics company headquartered in Miami, Florida. The two great passions of his life were applying engineering principles to scientific research and embracing the diversity of world cultures. Wallace Coulter was born on February 17, 1913, in Little Rock (Pulaski County) to Joseph R. Coulter and Minnie May Johnson Coulter. His father was a train dispatcher, and his mother was an elementary school teacher; he had one brother. Coulter spent his youth in McGehee (Desha County), graduating from McGehee High School. He attended his first year of college at Westminster College in Fulton, Missouri; his interest in electronics, however, led him …

Cross, John Storrs

John Storrs Cross became a national and international expert in all types of electronic communication as a member of the U.S. Department of the Interior, the U.S. Navy during World War II, and the U.S. Department of State, as well as the Federal Communications Commission (FCC). In Arkansas, he was the engineer for Hot Springs National Park in Hot Springs (Garland County) in the 1930s and ran a motel with his wife near Eureka Springs (Carroll County) in the later part of his life. John S. Cross was born in Birmingham, Alabama, on September 18, 1904, to Thomas C. Cross and Elise T. Cross. He had one younger sister, Elise. In his high school years, he attended the private McCallie …

DeGray Dam and Lake

DeGray Dam, located about eight miles northwest of Arkadelphia (Clark County), impounds the 13,400-acre DeGray Lake on the Caddo River. It was built by the U.S. Army Corps of Engineers (USACE) for purposes of electricity generation and flood control, as well as establishing a drinking water supply for Arkadelphia, and is the first “pump back capable impoundment” in the Corps’s history. A reregulation dam forms a 400-acre impoundment below the main lake, providing a supply of water that can be pumped back into DeGray Lake during times of drought and used again for hydropower generation and to provide a steady flow of water on the Caddo River. The site where DeGray Dam stands had been considered for a dam since …

Duke, Charles Sumner

A trailblazing African-American architect and engineer, Charles Sumner Duke not only designed unique public structures, but he also fought for housing rights and educational opportunities for African Americans. His powerful legacy continues in the buildings he designed, as well as in the organization he formed to facilitate the development of engineering and technological skills in youth of color. Charles Sumner Duke was born in Selma, Alabama, on July 21, 1879. His father, Jesse Duke, was the editorial writer and publisher for a local newspaper, The Herald. His mother, Willie Black Duke, was from a family of established businessmen. It was a financially secure family, allowing Duke and his siblings to take advantage of opportunities that many others in the black …

Evans, David L.

David L. Evans worked as an engineer on the Saturn rockets and Apollo moon landing missions but became best known later for his recruitment efforts on behalf of Harvard University, where his work led to greater diversity in the student body. He was inducted into the Arkansas Black Hall of Fame in 2005. David L. Evans was born in 1939 in Wabash (Phillips County), near Helena (Phillips County), to sharecropper parents; he was the fourth of seven children. His father died when he was ten years old. Family members encouraged his mother, pregnant with her seventh child, to move to Chicago, Illinois, or Cleveland, Ohio. Instead, his mother left tenant farming and became a maid. When Evans was sixteen, his …

Fess, Don

Don Fess of Magnolia (Columbia County) built and patented a prototype engine that saved energy by using rotating pistons rather than the standard up-and-down pistons. Don Fess was born in Allendale, Illinois, on February 12, 1915. His parents, Ora and Eunice Fess, moved with their four sons to Haynesville, Louisiana, in about 1925. Fess finished high school there at age sixteen (at that time, Louisiana schools had only eleven grades) and began to look for a job. He married Martha Emma Wainwright on June 1, 1934, and built a house across the street from his parents using salvaged lumber. He delivered ice seven days a week for a wage of $1.50 per day. He and his wife had six children. …

Forest Fire Lookouts

aka: Fire Towers
Fire towers (also known as lookouts) go back thousands of years. The oldest lookout still standing is the Tuztoromy Firewatch Tower in Sopron, Hungary, which was built in the thirteenth century and remodeled in 1681. The first one built in America was in downtown Harlem, New York, constructed in 1856 in what is now Marcus Garvey City Park. The first fire lookout strictly for protection of American forests was built in 1902 at Bertha Hill near Headquarters, Idaho. At the height of their use (1930s to 1970s), Arkansas had more than 120 fire towers; by 1994, forty-eight were still standing, and by 2023, there were forty-six. Arkansas has fourteen lookouts on the National Historic Lookout Register and three on the …