NAME OF MINE	SITUATION	OWNER	EMPLOYEES	REMARKS [3]
Carterthorne (New)	Toft Hill	Owners of New Carterthorne Colliery (Hamsterley) near Bishop Auckland	37 (31 & 6)[4]	Five Quarter & Brockwell abandoned 1927
Copley	Butterknowle	W. Teasdale	8 (7 & 1)	Five Quarter abandoned 1929
Cow Close	Cockfield	Woodland Collieries Co. Ltd. Darlington	15 (12 & 3)	Brockwell abandoned 1928 then Busty & Victoria 1940
Crake Scar	Cockfield	Woodland Collieries Co. Ltd. Darlington	174 (115 & 59)	Brockwell abandoned 1938
Diamond Pit	Cockfield	Butterknowle Colliery Co. Ltd. Darlington	18 (12 & 6)	Sinking Hutton abandoned 1920
Evenwood	Evenwood	North Bitchburn Coal Co. Ltd. Darlington		Standing Brockwell abandoned 1895
Gordon	Cockfield	Butterknowle Colliery Co. Ltd. Darlington	3 (2 & 1)	Pumping Station
Gordon House	Cockfield	North Bitchburn Coal Co. Ltd. Darlington	328 (261 & 67)	Nationalised
Hutton Seam Drift	Cockfield	Butterknowle Colliery Co. Ltd. Darlington	94 (74 & 20)
Lands	Cockfield	Hy. Stobart and Co. Ltd. Etherley, Darlington		Standing Brockwell abandoned 1876 and Busty 1883 and later
Millfield Grange	Cockfield	R. Summerson and Co., Cockfield	25 (20 & 5)
Morley Green	Morley	Hy. Stobart and Co. Ltd. Etherley, Darlington	13 (11 & 2)
New Copley	Cockfield	Woodland Collieries Co. Ltd. Darlington	228 (166 & 62)
North End	Cockfield	The owners of North End Colliery, Cockfield	14 (10 & 4)	Busty abandoned 1928
Norwood	Evenwood	The owners of Norwood Colliery, Evenwood	127 (187 & 40)	Busty Brockwell abandoned 1904.  Worked under licence by Wardle in the 1980s
Pit Close	Morley	Geo. Lowson, Pit Close, Morley	12 (9 & 3)
Quarry Pit Main Seam	Cockfield	Butterknowle Colliery Co. Ltd. Darlington	167 (120 & 47)
Quarry Pit Five-Quarter	Cockfield	Butterknowle Colliery Co. Ltd. Darlington	115 (81 & 34)
Railey Fell	Evenwood	Hy. Stobart and Co. Ltd. Etherley, Darlington	201 (155 & 46)	Closed 1939
Randolph	Evenwood	North Bitchburn Coal Co. Ltd. Darlington	449 (325 & 124)	Nationalised
Seven Sisters	Cockfield	Walker & Bradley, Cockfield		Brockwell abandoned 1925
Storey Lodge	Evenwood	North Bitchburn Coal Co. Ltd. Darlington	160 (129 & 31)	Five Quarter, Yard, Brockwell abandoned 1904
Wham	Butterknowle	Butterknowle Colliery Co. Ltd. Darlington	131 (89 & 42)	Main abandoned 1910 & 1931
Woodland	Cockfield	Woodland Collieries Co. Ltd. Darlington	176 (112 & 64)

Summary

In total 22 mines, employing 2495 miners:

• The North Bitchburn Coal Co. Ltd employed most men totalling 937 – at Randolph, Evenwood 449; Gordon House, Cockfield 328 and Storey Lodge, Low Lands 160. Evenwood Colliery was “standing”.
• Woodland Collieries Co. Ltd. Employed 593 men – New Copley Colliery 228, Woodland 176, Crake Scar 174 and Cow Close 15
• Butterknowle Colliery Co. Ltd employed 528 men – Quarry Pit (2 pits) 282, Wham 131, Hutton Seam Drift 94, Diamond Pit 18 and Gordon pumping station 3. 
• Henry Stobart and Co. Ltd. Employed 214 men at Railey Fell 201 and Morley Green 13.  Lands Colliery was “standing”.  At this time, this company’s major concerns were at Etherley George Pit and Jane Pit at Escomb and Witton Park.
• 9 concerns employed less than 50 miners.

The 1906 court case, Bishop Auckland Co-op v Butterknowle Colliery Co. Ltd., relating to subsidence went to High Court, Court of Appeal and the House of Lords and found in favour of the Co-op.  The colliery company went into liquidation.  Chipchase & Wood took over the assets and formed the New Butterknowle Colliery in 1910 which operated for about 5 years. 

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[1] “Peak District Mines Historical Society Ltd. From tables compiled by R.D. Bain, HM Inspector for the Durham District in his Report for 1896

[2] The Gaunless Valley is taken to be the area worked by those collieries served by the Haggerleases Branch (then later, from Spring Gardens Junction to Butterknowle Goods Yard, the Butterknowle Branch) and the Woodland Railway.  For the avoidance of doubt, St. Helen’s Colliery worked by Pease and Partners Ltd. Darlington; West Auckland Colliery worked by Bolckow, Vaughan and Co. Ltd., Middlesbrough; Copy Crooks worked by the Exors of F. Spoor, Bishop Auckland; Etherley George Pit worked by H. Stobart & Co. Ltd. Etherley; Hummerbeck worked by T. Boddy, West Auckland; Etherley Grange and Woodhouses Collieries worked by Etherley Grange & Woodhouse Coal Co. Ltd. and Woodhouse Close worked by Wm. Wilkinson are not included.

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

[4] Total (underground & surface)