Sandusky Bay and Cedar Point 



209 



Gypsum has been quarried near the north shore of the bay, 

 3 miles west of the Bay Bridge, for about three quarters of a 

 ■century. At first it was ground by a windmill, but about 1835 

 by a steam mill. Thirty-ton schooners anchored a mile out in 

 the bay and loaded for Detroit, Erie and other ports. This is 

 said to have been the only locality on the Lakes where plaster 

 was obtained at that time. The gypsum beds lie mostly below 

 lake level. Long ago about four acres of the bay at Plaster 

 Beds were diked off, the water pumped out and gypsum quarried. 

 A few years ago one of the plaster companies operating at 

 Pletcherville several miles west of Plaster Beds mined gypsum 



Map VI. 



Rock between Sandusky and Cedar Point. Figures give depth in 

 ieet and tenths below of water gage. + indicates rock was not reached, 

 l)ut, if foUowing a number less than 21, was probably within one foot. 



