The Mosby Creek Bridge, also called the Layng Bridge, is a historic Howe truss covered bridge located near Cottage Grove, Oregon, United States. The bridge crosses Mosby Creek and was constructed in 1920, making it the oldest covered bridge in Lane County.^[2]

Mosby Creek Bridge
Coordinates	43°46′42″N 123°00′17″W / 43.77833°N 123.00472°W / 43.77833; -123.00472
Carries	Layng Road
Crosses	Mosby Creek
Characteristics
Design	Covered, Howe truss
Total length	90 feet (27 m)
Width	13.5 feet (4.1 m)
Clearance above	12.3 feet (3.7 m)
History
Constructed by	Walter and Miller Sorensen
Construction end	1920
Closed	1979
Mosby Creek Bridge
U.S. National Register of Historic Places
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Nearest city	Cottage Grove, Oregon
Coordinates	43°46′42″N 123°0′17″W / 43.77833°N 123.00472°W / 43.77833; -123.00472
Area	0.1 acres (0.04 ha)
Built	1920
Architectural style	Howe Truss
MPS	Oregon Covered Bridges TR
NRHP reference No.	79002083[1]
Added to NRHP	November 29, 1979
Location

The Mosby Creek Bridge was built in 1920 for a cost of $4125 (US$62,738 in 2024) by Walter and Miller Sorensen.^[3] The bridge was named after the pioneer David Mosby. He settled east of present-day Cottage Grove near the current site of the bridge on a 1,600 acres (650 ha) land claim.^[4]

Unique design elements of the Mosby Creek Bridge include semi-circular portal arches (the entrances to the bridge), ribbon openings at the roofline, and board-and-batten siding, as well as modifications to the basic Howe truss design.^[3] In 1990, the bridge underwent a major restoration.^[5] In 2002, the corrugated metal roof that capped the bridge's gable roof was replaced with synthetic material, as well as other repairs.^[3][6]

In 1979, the bridge was added to the National Register of Historic Places. The Mosby Creek Bridge remains open to traffic, the only bridge in the area that does so.^[2] The Mosby Creek Bridge receives regular maintenance from the county.^[7]