Name	Parish	From	To	Comments
Maltby (Main)	Maltby	1907	2012
Manor (b)	Sheffield	1873	1889	Sinking from 1873 to 1877.
Manor (c)	Hoylandswaine, Barnsley	1937	1944	Abandoned August 1944.
Manor (d)	Wortley, Leeds	1888	1905
Manor Hill	Kirkburton, Huddersfield	1891	1891
Manor Laithe	Sheffield	1917	1924	Abandoned July 1924.
Manor No.2	Hoylandswaine, Barnsley	1941	1950	Fireclay, Blackband - Whinmoor, abandoned 20/06/1950, plan 15057.
Manston	Manston, Leeds	1854	1881	On 1st edition O.S. 1/10560 sheet.
Manston Lodge	Manston, Leeds	1865	1881	NB This is the location of Manston Lodge
Manton	Manton	1897	1993	No.2 Pit sunk 1897 to 1906. A new shaft was completed in 1952. Wound the first coal in Yorkshire after the 1984 to 1985 strike.
Manvers Main No.1	Wath upon Dearne	1868	1988	Sinking from 1868 to 1870 on shafts 1, 2 & 3. No.4 shaft was sunk to the Parkgate Seam in 1899-1901. Closed 25/03/1988.
Manvers Main Nos.2 & 3	Wath upon Dearne	1868	1936	Merged with Manvers No.1 in 1936
Margery Wood	High Hoyland, Barnsley	1920	1947	Abandoned November 1922 and reopened in 1929.
Markham Main	Armthorpe, Doncaster	1916	1992	Sinking from 1916 to 1924. In review May 1992. Closed October 1992.
Marriott Wood	Millhouses, Sheffield	1920	1928	Abandoned in 1921. Reopened in 1927 and abandoned August 22nd 1928.
Marsh	Southowram, Halifax	1897	1898	Baines, Whiteley & Rushworth
Marsh Lane	Southowram, Halifax	1902	1915	Stott & Gledhill; Stott & Sons 1906 onwards. 14 years. Listing begins 1902, mine abandoned in 1915; in this period it was worked in 11 years only. Up to 37 men employed. No plans available. Reopening 1910 to 1912. Abandoned 1915.
Marsh Platt	Huddersfield	1855	1860
Martins Main	Barnsley	1879	1879	List of fatal accidents
Mary	Churwell, Leeds	1874	1881	Sinking from 1874 to 1879
Masborough	Rotherham	1854	1854
May Royd	Northowram, Halifax	1893	1899
Mayers Lane	Bradfield, Sheffield	1938	1938
Meadow Fireclay	Sheffield	1874	1899	Sinking from 1874 to 1878.
Meadow Hall	Rawmarsh, Rotherham	1877	1904	Sinking from 1877 to 1881.
Meadow Hall	Sheffield	1921	1927	May be the same as Meadow Hall at Rawmarsh which was closed from 1904 to 1920
Meal Hill	Holmfirth, Huddersfield	1877	1881	Working in 1854?
Medhurst	Kippax, Leeds	1891	1908	Standing 1904 to 1908
Medhurst (a)	Kippax, Leeds	1902	1913	Standing 1909 to 1913.
Mellor Hill	Flockton, Wakefield	1904	1905
Meltham	Holmfirth, Huddersfield	1864	1873
Meltham	Holmfirth, Huddersfield	1903	1903	May have been called Greens End from 1904.
Melton Silkstone	Smithies, Barnsley	1929	1930	Abandoned June 2nd 1930
Merchant Fields	Cleckheaton	1873	1892	Sinking from 1873 to 1878. Near Brookhouse Iron Works.
Methley Junction	Methley, Leeds	1854	1902	Sunk to Haigh Moor about 1845 and to the Beeston in 1900. Called Methley from 1854 to 1860.
Methley Park II	Methley, Leeds	1966		5.5 miles SE of Leeds and 4 miles WNW of Castleford
Mexborough	Sheffield	1957	1959
Micklefield	Micklefield, Leeds	1854	1887	See Peckfield from 1888 onwards
Middle Lane	Clayton, Bradford	1893	1903	J. Thornton 1893 to 1898 and Clayton Brick & Stone Co. from 1898 to 1903.
Middle Woolhouse	Southedge, Hipperholme	1896	1902	Not listed after 1897. Shepherd & Bentley
Middlecliffe	Penistone	1855	1878
Middleton	Middleton, Leeds	1854	1887
Middleton Broom	Middleton, Leeds	1888	1968	Closed on 17/05/1968.
Middleton Broom, New	Middleton, Leeds	1928	1945	From 1928 to 1945 it was used as a pumping station for Middleton Broom.
Middleton Main	Middleton, Leeds	1876	1892	Sinking from 1876 to 1878.
Middleton, Beeston Park	Middleton, Leeds	1888	1899
Middleton, Little	Middleton, Leeds	1888	1901
Middleton, Middleton Main	Middleton, Leeds	1888	1899
Middleton, New Pit	Middleton, Leeds	1901	1925	Closed 1925 and used as a Pumping Station from 1927 to 1945.
Midgelden Brick Works	Dulesgate, Todmorden	1884	1887
Midgelden Pasture	Todmorden	1930	1937	NGR = Fire Clay Works
Midgelden Pasture No.2	Todmorden	1932	1944	Abandoned January 1935. Discontinued November 1944.
Midgelden Pasture No.3	Todmorden	1943	1944	Discontinued November 1944.
Midhope Stones	Sheffield	1873	1878	Sinking from 1873 to 1878.
Midland Pit	Rothwell, Leeds	1909	1914	On 1st edition O.S. 1/10560 sheet. A Ventilating shaft from 1910 to 1914 (at least)
Mill	Wyke, Bradford	1874	1887	Sinking from 1874 to 1875. Not listed 1876 to 1881.
Mill Dam	Thornhill Edge, Dewsbury	1953	1957
Mill Dam Opencast	Middlestown	1953	1957
Mill Hill	Burton-in-Lonsdale	1909	1929	Abandoned September 1914, plan 7118. To be reopened. Abandoned October 1929
Milnes	Beeston, Leeds	1884	1887
Milnthorp	Wakefield	1855	1877
Minerva	Sheffield	1905	1913	Abandoned 1908. Worked 1910 to 1912. Abandoned March 1913.
Mirfield	Mirfield, Dewsbury	1854	1889
Mirfield Moor	Mirfield, Dewsbury	1863	1931	Sunk 1882 to 1885? Abandoned June 1931.
Mirfield, Dark Lane & Calder	Ravensthorpe, Wakefield	1927	1931	Abandoned June 1931. Employment includes Mirfield Moor.
Mitchell Main	Darfield, Barnsley	1871	1956	Sinking from 1871 to 1877. Closed on 26/07/1956 and used as a Pumping Station from 1965 to 1988.
Mitchell Main	Darfield, Barnsley	1965	1988	Closed on 26/07/1956 and used as a Pumping Station from 1965 to 1988.
Mold Green	Huddersfield	1897	1897
Monckton Main Nos.1, 2 & 5	Havercroft, Barnsley	1875	1947	Sinking from 1875 to 1876. Called New Monckton Nos.1, 2 & 5 from 1948.
Monckton Main Nos.3 & 4	Havercroft, Barnsley	1913	1947	No.3 Shaft began sinking from 30/09/1913 to 03/03/1915. No.4 sinking 05/04/1923 to 21/05/1924. Called New Monckton Nos.3 & 4 from 1948.
Monk Bretton	Monk Bretton	1867	1968	Sinking in 1867. Closed on 26/04/1968.
Moor	Gleadless, Sheffield	1929	1945
Moor End Silkstone	Silkstone Common, Barnsley	1921	1948	Worked c1921 to 1924. Reopened in 1947. Moorend Silkstone Opencast = 1949-1952
Moor Hole	Mosbrough, Sheffield	1855	1900	Sunk 1855, closed c1900. Used as a Pumping Station in 1925.
Moor House	Barnsley	1869	1885
Moor Lane	Highburton	1872	1882
Moor Side	Mosbrough, Sheffield	1943	1992	Developed from December 1943 when the neighbouring Dent Main - opened in 1927 - became uneconomic. Last coal raised 28/02/1992.
Mooredge	Totley, Sheffield	1937	1938	Development in 1937 and discontinued in 1938.
Moorend	Cawthorne	1948	1911	Abandoned
Moorend	Stainborough, Barnsley	1893	1912
Moorend II Opencast	Silkstone Common, Barnsley	1948	1956
Moorend Silkstone Opencast	Silkstone Common, Barnsley	1949	1952
Moorgarth	Ingleton, Settle	1863	1877	Pits worked here were flooded in 1829. Sinking from 1863 to 1864. Closed from 1869 to 1873.
Moorhouse	Barnsley	1855	1872
Moorland	Gildersome, Leeds	1873	1880	Sinking from 1873 to 1880.
Moorside	Wortley, Leeds	1933	1933	Abandoned December 1933
Moorside	Kirkburton, Huddersfield	1887	1903
Moortown	Leeds	1874	1883	Sinking from 1874 to 1880.
Morley	Morley, Leeds	1855	1860
Morley (a)	Morley, Leeds	1861	1883
Morley (b)	Morley, Leeds	1861	1877
Morley (d)	Morley, Leeds	1855	1860
Morley Main	Morley, Leeds	1855	1908	Given as Morley from 1855 to 1859. Sunk around 1854 closed on 23/07/1909.
Morley West End	Morley, Leeds	1876	1897	Continues as West End from 1898 until May 1933. Abandoned October 1937.
Mosborough Moor	Mosbrough, Sheffield	1936	1936	Discontinued June 1936. Abandoned June 1938.
Mosley's	Skelmanthorpe	1915	1916	Not worked. Owner dead.
Moss Ganister Nos.1 & 2	Dore, Sheffield	1934	1938	Abandoned April 1941.
Moss Level	Lofthouse, Pateley Bridge	1920	1920	Abandoned
Mossdale Gill	Wensleydale	1877	1883	Standing in 1883
Mottram Wood	Barnsley	1908	1944	Abandoned September 1945
Mount	Brighouse	1897	1899	Longbottom & Barker. Earlier workings, back to the 1880's, shown on Thornhill Estate plans.
Mount Osborne	Barnsley	1854	1883	On 1st edition O.S. 1/10560 sheet.
Mount Pleasant	Ossett, Wakefield	1871	1871	On 1st edition O.S. 1/10560 sheet.
Mount Vernon	Barnsley	1861	1892
Mountain End	Halifax	1854	1874
Muffitt Lane	Gomersal	1870	1887
Myers Lane	Loxley, Sheffield	1874	1928	Sinking from 1874 to 1878. Abandoned May 8th 1928. Briefly reopened in 1937?
Myrtle Hill	Handsworth, Sheffield	1873	1873	Sinking
Myrtle Spring	Handsworth, Sheffield	1873	1876	Sinking from 1873 to 1876.
Myrtle Springs	Intake, Sheffield	1918	1921	Discontinued August 1921.
Mytholme	Southowram, Halifax	1890	1905	Abandoned in 1905.
Mytholme, New	Northowram, Halifax	1947	1956	+1960 & 1961
Mytholme, Old	Northowram, Halifax	1886	1905	Plan No.4790 - 36 Yard Band abandoned April 7th 1905.