NAME OF MINE	NAME OF OWNER	SITUATION	EMPLOYEES	REMARKS [2]
Grewburn Colliery	Butterknowle, Marsfield Collieries Ltd., Lloyds Bank Chambers, Darlington	Butterknowle	4 (3+1) in 1940	Victoria & Cowley abandoned 1945,  Harvey 1950
Penny Hill Drifts	Penny Hill Coal Co., Copley	Butterknowle	Unknown
Ramshaw, Copeland House, West Auckland & Spring Gardens	Ramshaw Coal Co. Ltd., Randolph Colliery Offices, Evenwood	Ramshaw & West Auckland	In 1940 Copeland House 29 (23+6) Ramshaw No.1 39 (29+10) Ramshaw No.2 77 (67+10) West Auckland 8 (6+2) Total 153 (125+28) On nationalisation Ramshaw No.2 64 (55+9) Ramshaw 122 (102+20) Total 186 (157+29)	NATIONALISED Copeland House closed 1948 Ramshaw No.2 Busty abandoned 1950, Brockwell 1951 Ramshaw No.1 Busty & Brockwell abandoned 1958 Gaugers Arms Hutton, Brockwell, Harvey, Victoria, Marshall Green 1959
Randolph and Gordon House Collieries	Randolph Coal Co. Ltd., Evenwood	Evenwood & Cockfield	1935 R & GH 591 (496+95) 1940 GH & R 472 (395+77) On Nationalisation Randolph 493 (388 +105)	NATIONALISED Randolph closed 1960 Gordon House 1961 Hutton Drift and Esperley Lane drift closed February 1962
High Hazelwood Colliery	Shaw Bros., High Hazelwood, Woodland	Woodland	Unknown	Brockwell abandoned 1954
West Tees Colliery	Henry Stobart & Co. Ltd., Darlington	Ramshaw	1935 198 (157 +41)	CLOSED 1939
Wigglesworth	Teasdale A & Sons, Cleveland Terrace, Cockfield	Cockfield	1940 20 (16+4)	No.2 Busty & Jubilee abandoned 1953 Low Main abandoned 1957
High Toft Hill	Toft Hill Colliery Co., Wind Mill, Etherley	Toft Hill	1936 11 (8+3)	Busty & Brockwell abandoned 1943
Victoria	Victoria Coal & Fireclay Co. Ltd., 5 Healeyside Rd., South Wellfield, Earsdon, Northumberland	Cockfield Fell	In 1940 20 (17+3)	Formerly New Copley Colliery Victoria & Cowley abandoned 1945 (?)

Summary

There were 9 collieries working in the Gaunless Valley employing about 700 miners. 

The largest companies were:

• The North Bitchburn Coal Co. Ltd which in 1940 employed a total of men 472 at Randolph (Evenwood) and Gordon House (Cockfield) Collieries.
• H. Stobart & Co. Ltd., which in 1935 employed 198 men at West Tees/Railey Fell colliery but it was closed by 1939.
• Ramshaw Coal Co. Ltd. which in 1940 employed 153 at its 4 collieries.

There were 6 concerns which employed 25 men or fewer.

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[1] “Reid’s Handy Colliery Guide & Directory 1938”

[2] Additional details from the NCB Catalogue of Abandoned Coal Mines at Coal House, Team Valley, Gateshead researched by K.N. Richardson 20 March 1985