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Historical Timeline
1930s
Fly ash was first used as a mineral filler in asphalt mixes.
1937
The term "fly ash" first appeared in literature in the Proceedings
of the American Concrete Institute.
1942
The Bureau of Reclamation (BOR) used coal fly ash concrete to repair a
tunnel spillway at the Hoover Dam.
1946
The Chicago Fly Ash Company was formed to market coal fly ash as a construction
material for manufacturing concrete pipes.
| 1949 The first large-scale use of coal fly ash was by BOR in the construction of the Hungry Horse Dam in Montana. |
 |
Mid 1950s
The Tennessee Valley Authority began using fly ash as a partial replacement
for portland cement.
1967
The first Ash Utilization Symposium was held in Pittsburgh, PA.
1968
The National Ash Association was founded and is currently known as the
American Coal Ash Association (ACAA).
1971
Coal ash use in structural fills was first documented in the United States.
Resource Conservation and Recovery Act (RCRA) was enacted and has been the dominant statute governing the management and use of ash derived from the combustion of coal.
1977
ACAA published its first Production and Use Statement.
1980
Congress enacted the Solid Waste Disposal Act Amendments to RCRA, also
known as the "Bevill Amendment," which excluded coal ash from
Subtitle C regulation.
1983
The U.S. Environmental Protection Agency (EPA) implemented federal procurement
guidelines that favored the purchase of cement and concrete containing
fly ash.
1985
The Coal Ash Resources Research Consortium was founded at the Energy &
Environmental Research Center.
1986
ACAA began reporting the production and use of flue gas desulfurization
material.
EPA issued a report to Congress concluding that coal ash does not exhibit hazardous characteristics and that regulation of coal ash should be under Subtitle D.
1993
EPA issued its final regulatory determination and continued to exempt
coal ash from regulation as hazardous waste.
2003
EPA sponsors the Coal Combustion Products Partnership (C2P2) Program.