Lake Tight

Lake Tight
Extent of Glacial Lake Tight about 500,000 YBP (years before present)
Lake Tight
Location	Ohio & West Virginia
Coordinates	38°48′N 82°13′W / 38.8°N 82.21°W / 38.8; -82.21
Lake type	former lake
Etymology	William G. Tight
Primary inflows	Laurentide Ice Sheet
Primary outflows	Ohio River
Basin countries	United States
First flooded	2,000,000 years before present
Max. length	c. 85 mi (137 km)
Max. width	c. 90 mi (140 km) – 212 mi (341 km)
Surface area	9,920 sq mi (25,700 km2)
Average depth	340 ft (100 m)
Max. depth	400 ft (120 m)
Residence time	170,000 years in existence
Surface elevation	c. 1,160 ft (354 m)
References	Goldthwaite, R. P., "The Teays Valley Problem, a Historical Perspective", pp. 3-8 in Wilton N. Melhorn, 1991, Geology and Hydrogeology of the Teays-Mahomet Bedrock Valley Systems, Geological Society of America Special Paper.

Lake Tight, named for geologist William G. Tight, was a glacial lake in what is present-day Ohio, Kentucky, and West Virginia, during the Ice Age the early Pleistocene before 700,000 years.^[1]