1950 Mt. Keira Colliery - operations abandoned in Wongawilli seam on Sept. 6th.due to excessive water & bad roof.
1950 Mt. Pleasant Colliery - #3 seam production commences on 16th Dec. to make up for loss of #3 seam at Kemira Clly
1950 Sth Clifton Colliery - taken over by Joint Coal Board
1951 Huntly Colliery - purchased by Joint Coal Board
1951 Coal Cliff Colliery - Samson Cutters & Goodman duck-bill Loaders introduced
1952 Nebo Colliery - replaces track mounted with trackless mechanisation
1952 Huntley Colliery - Continuous Miners introduced. Joy CM cuts and loads 32 tons Tongarra sm. coal (15/7/52)
1952 Wongawilli Colliery - Continuous Miners introduced
1952 Huntly Colliery - production ceases. New Huntley Colliery (on same site) expands.
1953 Last shipment of coal from Bellambi Jetty
1954 Kembla - Keira Tunnel - completed
1954 Huntley Colliery - control taken by Electricity Commission
1954 Sth Bulli Colliery - scraper loaders replaced with Jeffrey equipment
1954 Coalcliff Colliery - Duck-bill loaders withdrawn
1954 Coalcliff Colliery - purchased by Kembla Coal & Coke
1954 Metropolitan Colliery - 3600' drift replaces downcast winder
1954 Sth Clifton Colliery - purchased by S & M Fox
1954 Sth Clifton Colliery - conveyor belts replace endless rope
1954 Bellambi jetty abandoned
1955 Corrimal Colliery - old incline replaced by new incline direct to colliery
1955 Sth Clifton Colliery - Continuous Miners introduced
1955 Old Bulli Colliery - Continuous Miners introduced
1955 Nebo Colliery - Continuous miners introduced
1955 Mt. Keira Colliery changes official name Osborne-Wallsend to Kemira Colliery (7th.Feb)
1955 Kemira Colliery - Continuous Miners introduced (Joy 1CM3s)
1955 Bellambi jetty washed away
1955 Mt. Pleasant Colliery - operations cease 30th. Sept. ( equipment returned to Kemira Clly)
1957 Darkes Forest Ventilation Shaft commissioned
1957 Nebo Colliery - Shuttle cars introduced
1958 Wongawilli Colliery - Bulli seam found to exist in locally thickened area
1958 Kemira Colliery - Roof Bolters introduced in January (Fletcher)
1958 Kemira Colliery - Shuttle Cars introduced in September (Joy 10SCs)
1958 Tongarra Colliery - Coal to Tallawarra PS. (prod. 1945 - 26,000; 1951 - 40,000; 1958 - 70,000)
1959 Wongawilli Colliery - Incline replaced by Decline conveyor
1959 Coal Cliff Colliery - contract mining ceases
1960 Pt. Kembla No.2 Colliery - belt fire kills one workman
1960 Pt. Kembla No.2 Colliery (5.6 kms from Unanderra), closes
1960 Kemira Colliery - Pick-up Loaders introduced (Joy 11Bu & 14BUs)
1961 Bellambi Colliery - modernisation included 2 large buildings ($400,000). Also washery built.
1961 Wongawilli Colliery - Bulli seam production commences
1961 Excelsior Colliery closes
1962 Appin Colliery commenced
1962 Excelsior No.2 Colliery closes
1963 Huntley Colliery - Central Haulage System links Wongawilli & Tongarra seams
1963 Coal Cliff Colliery - Longwall equipment installed
1964 Corrimal Colliery - taken over by AIS in March.
1964 Pt. Kembla No. 2 Colliery purchased by AIS & becomes part of Nebo Colliery
1964 Pt. Kembla No.2 Colliery - closes
1964 Coal Loader at Pt. Kembla commissioned
1964 Bulli Colliery - 300m vent shaft drilled. (currently 400 employees, working 3 shifts)
1964 Bulli Colliery - small explosion by oxy - acetylene torch burns one miner.
1965 Corrimal Colliery & Kemira Colliery connected by barrier bin. Corrimal incline closed.
1965 Coal Cliff Colliery - Longwall equipment withdrawn (unsuccessful)
1965 Metropolitan Colliery - purchased by AIS
1965 Kemira Colliery - May/June first successful installation of fully mechanised retreating longwall
1965 Sth Bulli Colliery - Longwall unit installed
1965 Bulli Colliery - Nov. 9th, fire u/g, 4 died.
1966 O'Brien's Drift - coal haulage commenced on 9/5/66
1966 Huntley Colliery - first export order using temporary washery
1966 Bulli Main Colliery - continues production.
1966 Metropolitan Colliery - mechanisation completed
1967 Corrimal Colliery - August, commenced hauling coal via Kemira Colliery
1968 Mt. Kembla Colliery - Front end loaders introduced - not successful
1968 Huntley Colliery - Main washery installed
1968 Dombarton Colliery - commences, (equipment transferred to Yellow Rock Colliery, 1971)
1969 Appin Colliery - first longwall installed
1970 Yellow Rock Colliery - opens
1970 Mt. Kembla Colliery - closes 18th Sept.
1970 Sth Bulli Colliery - two additional longwall units installed
1970 Corrimal Colliery - No 3 Shaft commissioned (all coal output from here)
1971 Corrimal Colliery - experimental shortwall installed
1971 Darkes Forest Colliery - commences
1971 Dombarton Colliery closes
1972 Sth Clifton Colliery - closed by Clutha
1972 Nth Bulli Colliery - closed by Clutha
1972 Kemira Colliery - longwall mining ceases
1972 Westcliff Colliery - shaft sinking commences
1973 Sth Clifton Colliery - purchased by ?- re-opened
1973 Nth Bulli Colliery - purchased by ? -re-opened for short time
1975 Corrimal Colliery - August, Haulage Shaft completed, ceased hauling coal via Kemira Colliery.
1976 Westcliff Colliery - commences
1977 Wongawilli Colliery - Bulli seam production ceases.
1977 Kemira Colliery - connection from Wongawilli seam to Kemira Tunnel
1978 Tower Colliery commences
1979 Cordeaux Colliery commences
1979 Appin Colliery - 14 men killed in fire
1980 Cordeaux Colliery - officially opened
1980 Westcliff Colliery - Methane Drainage commences
1980 Tower Colliery - commences production
1981 Appin Colliery - Methane Drainage commences
1982 Westcliff Colliery - Longwall mining commences
1982 Westcliff Colliery - pilot 1.2 MW turbine installed in Methane Plant
1982 Brimstone #2 Colliery - closes 21/5/82
1982 Valley #1 Colliery - No. 2 Entry - closes 21/5/82
1983 Avondale Colliery - closes 17/1/83
1983 Sth Clifton Colliery - closes 16/9/83
1983 Valley #3 Colliery - closes 13/12/83
1984 Sth Bulli Colliery - retrenches labour
1984 Westcliff Colliery - 15 MW Power Plant installed in Methane Drainage Plant
1985 Corrimal Colliery - closes 7/12/85
1986 Cordeaux Colliery merges with Corrimal Colliery
1987 Bulli Colliery - closes 15/5/87
1987 Avon Colliery - closes 26/6/87
1987 Yellow Rock Colliery - closes 26/6/87
1988 Kemira Colliery - longwall reintroduced.
1988 Tower Colliery - longwall commences.
1989 Metropolitan Colliery - Denehurst purchases from Savage Resources
1989 Tower Colliery - methane drainage commences.
1989 Huntley Colliery closes
1991 Kemira Colliery - Fri. Sept.27th mining ceases.
1991 Wongawilli Colliery - mining in Bulli seam for Elouera roadways
1991 Cordeaux Colliery - produces largest amount of coal in any u/g coal mine in Australia.
1992 Appin Colliery - on site coal preparation plant starts.
1993 Elouera Colliery - established from consolidation of Wongawilli, Nebo & Kemira Collieries.
1993 Cordeaux Colliery - first of any u/g coal mine in Australia to receive accreditation AS3902
1995 Metropolitan Colliery - Denehurst acquires 90% interest.