Near Clear Spring in Washington County, Maryland — The American Northeast (Mid-Atlantic)
Protecting Cultural Resources
In 1998, the guard lock and flume were filled with soil to halt the collapse of the stone walls. A section of the towpath that was collapsing was replaced with "Roller Compacted Concrete (RCC)" which is a concrete mix with a small amount of cement and a high amount of gravel. The stone for the aggregate was acquired locally to match the stone already used here. The RCC is spread and compacted by a roller and does not require formwork like conventional concrete. By filling the lock and bypass flume and reconstructing the towpath and guard dike, the National Park Service is trying to protect the historic structures from future flood damage.
Erected by Chesapeake and Ohio Canal National Historic Park and U.S. Department of Interior, National Park Service.
Marker series. This marker is included in the Chesapeake and Ohio Canal marker series.
Location. Touch for map. Marker is in this post office area: Clear Spring MD 21722, United States of America.
Other nearby markers. At least 8 other markers are within 4 miles of this marker, measured as the crow flies. Stonewall Jackson at Dam 5 (here, next to this marker); Mule Power (approx. 1½ miles away); Four Locks (approx. 1½ miles away); a different marker also named Four Locks (approx. 1½ miles away); McCoy's Ferry (approx. 2.6 miles away); Lancelot Jacques (approx. 3 miles away); Clear Spring Veterans Memorial (approx. 3.3 miles away); Clear Spring (approx. 3.4 miles away). Touch for a list and map of all markers in Clear Spring.
More about this marker. Caption for photo on left side of sign: Guard Lock and Dam Number 5 with Electric Generating Plant on Opposite Bank.
Caption for photo on right side of sign: Looking Upstream at Guard Lock During Operation Period of Canal.
Related marker. Click here for another marker that is related to this marker. To better understand the relationship, study each marker in the order shown.
Categories. • Man-Made Features • Waterways & Vessels •
Credits. This page was last revised on June 16, 2016. This page originally submitted on December 5, 2009, by Robert H. Moore, II of Winchester, Virginia. This page has been viewed 593 times since then. Photos: 1, 2. submitted on December 5, 2009, by Robert H. Moore, II of Winchester, Virginia. • Craig Swain was the editor who published this page.