A Lift Lock Historical

A Lift Lock Historical (HM1WGJ)

Location: Potomac, MD 20854 Montgomery County
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Country: United States of America
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N 39° 0.013', W 77° 14.905'

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Inscription

Chesapeake and Ohio Canal National Historical Park

When a river, such as the Potomac, was too swift or shallow for navigation, shippers built canals with lift locks along the river course. The C & O Canal consists of flat stretches of water connected by lift locks. The use of locks enabled the canal to match the river's gradient.

Water was permitted to flow into, or out of, the lock by opening or closing a paddle at the bottom of each lock gate.

(Inscriptions on the left) 1. A boat heading downstream enters the lock. The mules are unhitched and let downstream. 2. The lock gates are closed. 3. The downstream paddles are opened, water flows out, and the boat is lowered. 4. With water levels equal, mules are hitched, and the lock gates are opened, the boat continues downstream.
Details
HM NumberHM1WGJ
Series This marker is part of the Chesapeake and Ohio Canal series
Tags
Placed ByNational Park Service US Department of Interior
Marker ConditionNo reports yet
Date Added Monday, January 9th, 2017 at 9:01am PST -08:00
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Locationbig map
UTM (WGS84 Datum)18S E 305295 N 4319205
Decimal Degrees39.00021667, -77.24841667
Degrees and Decimal MinutesN 39° 0.013', W 77° 14.905'
Degrees, Minutes and Seconds39° 0' 0.78" N, 77° 14' 54.3" W
Driving DirectionsGoogle Maps
Area Code(s)240, 301
Closest Postal AddressAt or near Chesapeake and Ohio Canal Towpath, Potomac MD 20854, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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