Aqueducts on the C&O Canal
The Chesapeake and Ohio Canal (C&O) used 11 navigable aqueducts to carry the canal over rivers and streams that were too wide for a culvert to contain. Aqueducts, like locks and other masonry structures, were called "works of art" by the canal board of directors.[1]
In addition to these 11 aqueducts, there was the Alexandria Aqueduct, which connected the C&O Canal with Alexandria, Virginia, and the Broad Trunk Run Aqueduct, made of wood, and was originally a double culvert, and never listed in company records as an aqueduct.
The aqueducts of the C&O, unlike the Roman aqueducts, were built with inferior materials and cement, and did not have a long life expectancy. Usually the trash from the floods did the most harm to the aqueducts.[2]
Seneca Aqueduct
The Seneca Aqueduct (#1), located in Montgomery County, Maryland, also included a lock built in (Riley's Lock). The aqueduct was completed in 1832. It collapsed in 1971 due to flooding.
There was a stone cutting mill just at this point, on the upstream side. It cut stone from Marble Quarry (above White's Ferry on the canal), and Cedar Point Quarry (which was around Violette's lock, one lock downstream), as well as the quarries of Seneca sandstone. It was powered by canal water diverted into a mill race to a turbine.[3]
This aqueduct was also the site of an incident in 1897 when the passenger steam packet boat leaving the aqueduct collided with a freight boat loaded with watermelons. There were no injuries to the passengers when the boat sank, but the local people collected free watermelons floating in the turning basin just above the aqueduct.[4]
Broad Run Trunk (Aqueduct)
This "unofficial" aqueduct was originally two stone culverts 16 feet (4.9 m) long, listed as Culvert #44½. Construction originally began in 1829, on section 53, and after several contractors worked on it, was completed in 1833. It later washed out in 1846. A wooden trunk was put in to keep navigation open. It deteriorated until it could not be repaired, and was rebuilt 1856.[5] Troops burned it during the American Civil War, and it was replaced again.[6] The wood rotted and constantly had to be replaced. Although it was an aqueduct, the company records still listed it as a culvert.[7]
Monocacy Aqueduct
The Monocacy Aqueduct (#2) in Frederick County, Maryland is the longest aqueduct. It was completed in May 1833. It is 516 feet (157 m) long, with seven 54 feet (16 m) arches. It was begun in March 1829 and finished in April 1833. Quartz sandstone came from nearby Sugar Loaf Mountain. Some stone was boated down the Monocacy River, and the rest by a wagon tramway, having oak rails covered with iron straps.[8]
Catoctin Aqueduct
The Catoctin Aqueduct (#3) was completed in 1834. This was also called the "Crooked Aqueduct" because of the sharp turns before and after it on the canal. Recklessness among boatmen (usually because of speeding) resulted in accidents, damaging the sides of the aqueduct. In March 1870, the board ordered that all boats should slow down 50 yards from the aqueduct, and stationed a watchman to ensure compliance, as well as printing handbills to that effect.[9] Boatmen called this creek "Jug Creek."[10]
It was made of granite from Ellicott Mills, Maryland. Since it uses two different kinds of arches: elliptical in the center, and Roman on the side, the two stresses do not balance each other, and are prone to failure. Cited as the worst built structure on the canal, during construction the west pier was torn down and rebuilt. Leaking seriously since 1859, it sagged badly in 1926, finally collapsing in October 31, 1973.[11] In 2007 funds were raised for restoring the aqueduct.
On April 2, 2010, Corman Construction was awarded $3.93 million for restoration.[12] 495 original stones were found and used,[13] and was reopened on 25 October 2011.
Antietam Creek Aqueduct
The Antietam Creek aqueduct, which is on section 126, was begun in 1832 and completed in April 1835.
Conococheague Creek Aqueduct
The Conococheague Creek Aqueduct (#5) was contracted to Michael Byrne (who completed more contracts on the canal later) in 1832. Work started in 1833, and was completed in November 1835 at a cost of $43,283.78.[14] It is at the 99.80 mile mark (Section No. 188).
This aqueduct, made of local limestone, was damaged during the Civil War by Mosby's Raiders.[15] The stonework wall "went out" (as a boatman would say) three times: 1865, 1887, and finally in 1920.[16]
On April 20, 1920, when the wall went out, boat #73 was returning to Cumberland after dropping off coal in Williamsport. The boat bounced off the wall, and Captain Myers said that he saw the aqueduct wall shudder, and shouted to his stepson to release the mules. The wall collapsed, and Captain Myers was able to jump to safety before the boat fell through the break into the creek. All survived the accident.[17]
Licking Creek Aqueduct
The Licking Creek Aqueduct (#6) on section 222 was begun in 1835. In 1837 the contract was reassigned when the original contractor, Holdsworth, died. It was finally completed in May 1938 at the cost of $48,023.85.[18]
This is the shortest aqueduct, 50 feet long.
Tonoloway Creek Aqueduct
The Tonoloway Creek Aqueduct (#7) was completed in June 1839
This aqueduct is an incomplete Roman arch, incomplete because one end was built into a limestone cliff.[19]
Sideling Hill Creek Aqueduct
The Sideling Hill Creek Aqueduct (#8) was begun in 1837. was completed in Spring 1850.
Fifteen Mile Creek Aqueduct
The Fifteen Mile Creek Aqueduct (#9) was begun in 1838. Contracts were abandoned, work was restarted, and finally was completed in Summer 1850 at a cost of $28,119.51.[20]
Town Creek Aqueduct
The Town Creek Aqueduct (#10), like the other aqueducts on the last 50 miles (80 km), was begun in 1838, and had the contract abandoned and later another contractor began work (in 1847). It was completed in the Summer of 1850.[21]
Evitts Creek Aqueduct
The Evitts Creek Aqueduct (#11) was begun in 1838, and finally completed in the Spring of 1850 at a cost of 45,986.00.[22]
References
- ^ Bearss, Edwin C. (1967). Tonoloway Aqueduct., U.S. National Park Service. p. v
- ^ Kytle p. 81
- ^ Hahn, Thomas F. Swiftwater (1993). Towpath Guide to the C&O Canal: Georgetown Tidelock to Cumberland, Revised Combined Edition. Shepherdstown, WV: American Canal and Transportation Center. ISBN 0-933788-66-5. P. 57
- ^ Hahn, Towpath Guide, p.57
- ^ Unrau, Harlan D. (2007). Historic Resource Study: Chesapeake & Ohio Canal (PDF). Hagerstown, Md.: U.S. Department of the Interior, National Park Service, Chesapeake & Ohio Canal National Historical Park. p. 251. LCCN 2007473571.
- ^ Hahn, Towpath Guide, p.66
- ^ Kytle, Elizabeth (1983). Home on the Canal. Cabin John, MD: Seven Locks Press. ISBN 978-080185328-9. p. 80
- ^ Hahn, Towpath Guide, p. 78
- ^ Harland D. Unrau. "Historical Resource Study: Chesapeake & Ohio Canal" (PDF). US Department of the Interior, National Park Service. Retrieved 2013-05-02. p. 811
- ^ Hahn, Towpath Guide, p. 88
- ^ Kytle P. 78-79
- ^ http://canaltrust.org/trust/index.php?page=catoctin
- ^ http://www.canaltrust.org/discoveries/sites.php?siteID=28
- ^ Unrau, p. 240
- ^ Han, Towpath p. 150
- ^ Kytle P. 79
- ^ Kytle p. 187-188 footnote
- ^ Unrau, p. 240
- ^ Kytle P. 79
- ^ Unrau, p. 240
- ^ Unrau p. 241
- ^ Unrau p. 241
External links
- Historic American Engineering Record (HAER) No. MD-123, "Chesapeake & Ohio Canal, Conococheague Creek Aqueduct, Milepost 99.80, Williamsport, Washington County, MD", 13 photos, 5 measured drawings, 45 data pages, 3 photo caption pages