Tailings Dams in Maryland

Maryland has 17 tailings dams, of which 2 carry a high hazard classification. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted.

#	Dam	County	Height (ft)	Hazard	Condition	Year
1	York Bldg Products Settling Pond 12	Cecil	70	Significant	Satisfactory	2004
2	Mason Dixon Original Settling Pond	Cecil	52	Low	Satisfactory	1966
3	York Bldg Products Settling Pond 11	Cecil	51	Significant	Fair	1999
4	Cecil Sand And Gravel Pond 6	Cecil	49	Significant	Fair	2006
5	York Bldg Products Settling Pond 10	Cecil	48	Significant	Fair	1991
6	York Bldg Products Settling Pond 13	Cecil	45	Significant	Satisfactory	2016
7	York Building Products Pond No. 5	Cecil	44	Low	Satisfactory	1971
8	York Bldg Products Settling Pond 9	Cecil	43	Significant	Satisfactory	1988
9	Contee Main Settling Pond	Prince George's	41	High	Unsatisfactory	1973
10	Cove Point Lng Secondary Dam	Calvert	38	Significant	Fair	1974
11	Cox Creek Dmcf	Anne Arundel	36	High	Satisfactory	1960
12	York Building Products Pond No. 6	Cecil	30	Low	Satisfactory	1971
13	York Building Products Pond No. 7 Dam	Cecil	30	Low	Satisfactory	1971
14	Medford Quarry Wash Pond	Carroll	26	Significant	Fair	1988
15	Stancills Inc. Settling Pond	Cecil	26	Low	Poor	1976
16	Cecil Sand And Gravel Pond 7	Cecil	24	Significant	Satisfactory	2017
17	Masonville Dmcf	Baltimore City	18	Low	Satisfactory

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