Seneca Historical

Seneca Historical (HM1T9G)

Location: Darnestown, MD 20874 Montgomery County
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Country: United States of America
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N 39° 4.127', W 77° 20.449'

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Chesapeake and Ohio Canal National Historical Park

Eleven aqueducts were built from Georgetown to Cumberland to carry water over water. The aqueducts, literally "water bridges," carried the canal over large streams and rivers flowing into the Potomac River. This aqueduct enters directly into the lock, the only one on the canal to do so.

The Seneca Creek Aqueduct, or Aqueduct Number One, Lock 24, and the lockhouse were built of Seneca Red Stone quarried nearby. This same distinctive sandstone was used to construct the Smithsonian Castle on the Washington Mall.

(Inscription next to the image on the top right) The Riley name is forever linked to Lock 24. The Riley family (right) lived in the lockhouse for many years. After John Riley (on left in photo) died, Mrs. Riley took over duties as lockkeeper and had over 45 years of service here.

(Inscription over the image in the bottom right) A canal boat entering Seneca Aqueduct is carried over the Seneca Creek.
HM NumberHM1T9G
Series This marker is part of the Chesapeake and Ohio Canal series
Placed ByNational Park Service US Department of Interior
Marker ConditionNo reports yet
Date Added Tuesday, July 26th, 2016 at 9:03am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)18S E 297489 N 4327017
Decimal Degrees39.06878333, -77.34081667
Degrees and Decimal MinutesN 39° 4.127', W 77° 20.449'
Degrees, Minutes and Seconds39° 4' 7.62" N, 77° 20' 26.94" W
Driving DirectionsGoogle Maps
Area Code(s)240, 301
Closest Postal AddressAt or near , Darnestown MD 20874, US
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