Grand Lake St. Marys Spillway

Grand Lake St. Marys Spillway (HM1KHO)

Location: Celina, OH 45822 Mercer County
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Country: United States of America
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N 40° 32.065', W 84° 34.452'

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Mercer County Reservoir

— Miami and Erie Canal Feeder —

Grand Lake St. Marys was constructed between 1837 and 1845
as a feeder reservoir for the Miami and Erie Canal. The
reservoir provided a constant source of water for the
canal through a feeder canal located at the eastern
embankment of the lake. At the western embankment of
the lake a spillway was constructed in 1843 south of
the site of Coldwater Creek as a control structure
for the lake. Following the Flood of 1913 a new spillway
was constructed in 1914 at Beaver Creek near this site
The spillway complex included a gatehouse that housed
the gate opening mechanisms. Two historic plaques
from that gatehouse are mounted on this monument. The
present spillway was constructed between 1996- 1997 as
a replacement for the 1914 spillway, and is 500 feet long
and 19.5 feet from the crest to the toe of the
The State of Ohio
Ohio Department of Natural Resources
completed June 1, 1997
Jones- Stuckey LTD., Inc., Columbus, Ohio,
Cconsulting Engineer
E. S. Wagner Company, Oregon, Ohio,
General Contractor
Series This marker is part of the The Miami & Erie Canal series
Year Placed1997
Placed ByOhio Department of Natural Resources
Marker ConditionNo reports yet
Date Added Friday, May 15th, 2015 at 2:02pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)16T E 705451 N 4489902
Decimal Degrees40.53441667, -84.57420000
Degrees and Decimal MinutesN 40° 32.065', W 84° 34.452'
Degrees, Minutes and Seconds40° 32' 3.9" N, 84° 34' 27.12" W
Driving DirectionsGoogle Maps
Area Code(s)419, 567
Which side of the road?Marker is on the right when traveling South
Closest Postal AddressAt or near 1101-1105 State Rte 703, Celina OH 45822, US
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