Enterprise South Industrial Park
Encyclopedia
The Enterprise South Industrial Park, located in Chattanooga, Tennessee
Chattanooga, Tennessee
Chattanooga is the fourth-largest city in the US state of Tennessee , with a population of 169,887. It is the seat of Hamilton County...

 consists of 3000 acres (12.1 km²). A large portion of this property is now home to Volkswagen's new United States automobile plant.

History

The Volunteer Army Ammunition Plant (VAAP) operated as a TNT (trinitrotoluene manufacturing facility from 1942 to 1977 and supported a fertilizer
Fertilizer
Fertilizer is any organic or inorganic material of natural or synthetic origin that is added to a soil to supply one or more plant nutrients essential to the growth of plants. A recent assessment found that about 40 to 60% of crop yields are attributable to commercial fertilizer use...

 production facility from 1962 to 1982. The following provides a detailed history of operations occurring at VAAP from its creation in 1942 to the present.

1942-1945

The Army Corps of Engineers (ACOE) built the original facilities to support World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. Initial operation began in July 1942 with the Hercules Powder Company
Hercules Inc.
Hercules, Inc., was a chemical and munitions manufacturing company based in Wilmington, Delaware, which was formed in 1912 as the Hercules Powder Company. Hercules was spun-off from the DuPont Corporation as a result of U.S. federal government actions in the field of antitrusts...

 of Wilmington Delaware as the operating contractor. Sixteen TNT batch process lines and associated nitric
Nitric acid
Nitric acid , also known as aqua fortis and spirit of nitre, is a highly corrosive and toxic strong acid.Colorless when pure, older samples tend to acquire a yellow cast due to the accumulation of oxides of nitrogen. If the solution contains more than 86% nitric acid, it is referred to as fuming...

 and sulfuric acid
Sulfuric acid
Sulfuric acid is a strong mineral acid with the molecular formula . Its historical name is oil of vitriol. Pure sulfuric acid is a highly corrosive, colorless, viscous liquid. The salts of sulfuric acid are called sulfates...

 facilities operated until August 1945. Approximately 823 million pounds of TNT were produced for WWII at VAAP (IT Corp 1994).

1946-1952

From January 1946 to the spring of 1952, VAAP was officially on standby status and operated and maintained by the government
Federal government of the United States
The federal government of the United States is the national government of the constitutional republic of fifty states that is the United States of America. The federal government comprises three distinct branches of government: a legislative, an executive and a judiciary. These branches and...

 (USATHAMA 1978; Army 2003).

1952-1957

VAAP was reactivated in 1952 for the Korean War
Korean War
The Korean War was a conventional war between South Korea, supported by the United Nations, and North Korea, supported by the People's Republic of China , with military material aid from the Soviet Union...

, and operated by the Atlas Chemical Industries of Wilmington Delaware until 1957. Approximately 283 million lbs of TNT were produced for the Korean War (IT Corp 1994). During this period the first Army studies were undertaken to examine methods of pollution control but VAAP was put on standby status before pollution strategies could be implemented (IT Corp 1994).

1957-1965

VAAP was on standby status from 1957 until 1965 when it was reactivated for the Vietnam War
Vietnam War
The Vietnam War was a Cold War-era military conflict that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. This war followed the First Indochina War and was fought between North Vietnam, supported by its communist allies, and the government of...

 (Army 2003a; IT Corp 1994). Between the Korean and Vietnam Wars there was considerable residential development north of VAAP and adjacent to the Chickamauga Lake
Chickamauga Lake
Chickamauga Lake is a United States reservoir along the Tennessee River created when the Chickamauga Dam, as part of the Tennessee Valley Authority, was completed in 1940. The lake stretches from Watts Bar Dam at mile 529.9 to Chickamauga Dam at mile 471.0 making the lake 58.9 miles long...

 (IT Corp 1994). From March 1957 to December 1964 the plant was under the protective surveillance of Atlas Chemical Industries; and in December 1964 until September 1965 protective surveillance was passed onto Farmers Chemical Association Inc.
CF Industries
CF Industries Holdings, Inc. is a North American manufacturer and distributor of agricultural fertilizers, based in Deerfield, Illinois, a suburb of Chicago....

 (subsequently known as CF Industries
CF Industries
CF Industries Holdings, Inc. is a North American manufacturer and distributor of agricultural fertilizers, based in Deerfield, Illinois, a suburb of Chicago....

, Incorporated [CFI]). In September 1965 a new contract with Atlas was entered into with the Army (SI 1994). On January 6, 1972, Atlas merged into ICI America Incorporated (ICIA), and is currently called ICI Americas, Inc. (Army 2003a; USATHAMA 1978).

In 1961, the government leased the "CFI Lease Area," an area along the western border of VAAP, to CFI (Bonds 1985). Previously the area had been used for nitric and sulfuric acid production (Army 2003a). In 1962, CFI used the existing acid facilities and built an ammonia plant on the 824-acre lease area to produce ammonium nitrate fertilizer, urea, and related products (Army 2003a). In 1963 a urea plant was put into operation, thereby doubling CFI's production capacity (IT Corp 1994).

1965-1977

In 1965, VAAP was reactivated and ten TNT batch process lines were used to produce TNT for the Vietnam War (IT Corp 1994).

Additionally, upon reactivation, the Army decreased the number of acres in the original CFI lease area and took over the operation of some of the acid production equipment to increase nitric acid production and sulfuric acid concentration capacity. Therefore, in 1966, CFI constructed a new acid plant adjacent to the ammonia
Ammonia
Ammonia is a compound of nitrogen and hydrogen with the formula . It is a colourless gas with a characteristic pungent odour. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers. Ammonia, either directly or...

 plant, and operated the existing acid plant in the lease area for the Army (Bonds 1985; Army 2003a).

In February 1969, as VAAP began to upgrade facilities, the batch processing lines began to decrease (Report 123, 1978; Army 2003a). From July 1971 to 1975, six new CIL continuous process lines were built in an area where four old batch process lines were previously razed (Army 2003a). Lines 1, 2, and 3 were modernized by May 1974, and a contract for modernizing Lines 4, 5, and 6 was awarded in June 1974. However, from November 1974 to March 1977, only one of the six Canadian Industries Limited (CIL) lines was operated because plant operations ceased before the other five became operational (IT Corp 1994; USATHAMA 1978).

In June 1970, the Army began to build the New Acid Area. The area included a Direct Strong Nitric (DSN) Acid Facility, an Ammonia Oxidation Process (AOP) Nitric Acid Facility, and Sulfuric Acid Regeneration (SAR) Facilities (used for oleum production) (IT Corp 1994; USATHAMA 1978).
In 1972, a carbon dioxide
Carbon dioxide
Carbon dioxide is a naturally occurring chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom...

 plant was constructed at the CFI Lease Area and an industrial waste water system was built to treat and recycle ammonium nitrate wastewater (IT Corp 1994; USATHAMA 1978).

By January 1975, all batch process lines stopped and, in 1977, TNT production at VAAP ceased altogether and the plant was placed on inactive status (Army 2003a). A total of 1,765 million lbs of TNT were produced for the Vietnam War (IT Corp 1994).

1980s

CFI produced commercial ammonium nitrate at the CFI Lease Area until 1982. From 1982 to 1985 the CFI Lease Area was inactive, and the CFI facilities were ultimately dismantled for salvage between 1985 and 1986 (IT Corp 1994). The Army acid facilities in the southern area were dismantled during the 1950s and 1960s. The northern acid facilities were dismantled by approximately 1997 (Army 2003a, IT Corp 1995, Public Comment 2004b).

1990s

During the 1990s, VAAP operated the burning ground to treat materials contaminated with TNT or TNT waste materials generated while VAAP was operational (EPA 2003a; IT Corp 1994, Public Comment 2004b)

On September 5, 1995, approximately $5 million was awarded to ICIA to reactivate and modify one of the TNT lines at VAAP for production of commercial TNT. The contract was awarded under the Armament Retooling and Manufacturing Support Act of 1992, and the work was to be complete by July 31, 1996 (DOD 1995). This work was never completed and the ICIA contract expired on December 31, 1998. Tecumseh Professional Associates became the new contracting operator, however, the project remained and remains inactive.

Conversion to Civilian Uses

In the 1990s, portions of the site began to be opened up to civilian purposes. Hickory Valley Road was opened through the plant, connecting Highway 58 with Bonny Oaks Drive. The Hamilton County Schools executed a lease on the old administration buildings at VAAP, renovating the facilities for their central office.

An additional 2800 acres (11.3 km²) of land on the east side of the industrial park
Industrial park
An industrial park is an area zoned and planned for the purpose of industrial development...

 was opened to the public as the Enterprise South Nature Park. The park opened to the public in December 2010. The park is for passive uses, including bicycling and walking. Hours of operation are from 7:00am to Sunset.

First time visitors to the park are encouraged to speak to onsite rangers or visitor center staff before exploring the park.

On October 14, 2010 it was announced that CSX and Norfolk Southern Railway
Norfolk Southern Railway
The Norfolk Southern Railway is a Class I railroad in the United States, owned by the Norfolk Southern Corporation. With headquarters in Norfolk, Virginia, the company operates 21,500 route miles in 22 eastern states, the District of Columbia and the province of Ontario, Canada...

 would again serve the site following the completion of a $6.6 million project to provide dual rail service to the Volkswagen Chattanooga Assembly Plant
Volkswagen Chattanooga Assembly Plant
Volkswagen Chattanooga Assembly Plant is an automobile assembly plant in Chattanooga, Tennessee that began production in April 2011, was formally inaugurated in May 2011 and is expected to employ approximately 2,000 once fully operational...

. The newly-completed yard was dedicated on April 6, 2011. Work included "the biggest rail overhaul in and around the Volunteer Army Ammunition Plant since the tracks were laid during World War II." Direct switching activities for the site are handled by the Tennessee Valley Railroad Museum, which transfers railcars to NS and CSX trains.
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