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Detters Mill Bridge 38-67-01x


Detters Mill around early 1960s

Fred Yenerall collection

BH Photo #191463



One of the longest wood bridges in the state, this bridge was a fine example of early 19th century engineering. Attributed to noted early bridge engineer, Theodore Burr.

-- Historic American Buildings Survey

Brief Facts about Detters Mill Bridge 

Written by Jodi Christman

In the most western part of Dover Township about 2.5 miles south of Wellsville, a covered bridge once crossed the Conewago Creek on Harmony Grove Road. It crossed downstream from Detters Mill, a stone grist mill, which was built by George Sheffer in 1830.

This covered bridge was built about 1815 with a gable roof. This bridge was made of heavy timbers, and originally was sheathed by clapboards. With multiple kingpost truss framing and the use of large Burr Arches this wooden structure was very hearty.

As a two-span bridge (a pier in the middle separated the two spans) with two Burr arches this old bridge is most interesting. A double-span covered bridge was not common in York County.

Some believe famed master bridge builder Theodore Burr of Connecticut, may have built this bridge as he had constructed several bridges in this part of Pennsylvania.

Measuring 296 feet 11 inches by 21 feet 9 inches, it was noted as one of the longest remaining covered wooden bridges in the state of Pennsylvania before its collapse in 1965. Sadly, this bridge was never preserved as a landmark.

Prowell, George R., A History of York County, Pennsylvania. 1907.
Mingus, Scott, Rebels Ride by Detters Mill in Dover Township,www.YorkBog.com, January 8, 2009 http://www.yorkblog.com/cannonball/2009/01/rebels-ride-by-de...
The Greater Dover Historical Society, Inc., http://www.gdhspa.org/DettersMillBridge.htm


Lost Burr arch-truss bridge over Conewago Creek on SR 4014 (Harmony Grove Road)
York County, Pennsylvania
Replaced by new bridge
Built 1815; replaced 1965
- John Finley
Double-span Burr Arch Covered Bridge
Total length: 275.0 ft.
Approximate latitude, longitude
+40.01539, -76.92430   (decimal degrees)
40°00'55" N, 76°55'27" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/335774/4431238 (zone/easting/northing)
Quadrangle map:
Inventory numbers
WGCB 38-67-01x (World Guide to Covered Bridges number)
BH 47485 (Bridgehunter.com ID)

Update Log 

  • January 2, 2011: Essay added by Jodi Christman