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Burchell Avenue over Duck Slough

Merced County, California · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Burchell Avenue over Duck Slough in Merced County, California, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1938, making it 87 years old at the 2025 inventory.
It carries about 360 vehicles a day (traffic count year 2018).
Its listed owner is the county highway agency.
It is one of 23 of the 532 inventoried bridges in Merced County rated poor (4.3%); 23 (4.3%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Timber stringer or multi-beam girder
Length	about 230 ft
Location	0.6 Mi N/o Mariposa Way
NBI structure number	39C0290
Condition class	Poor

Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.

Bridge	Built	Vehicles/day	Condition
State Route 99 over Turlock Canal	1935	65,000	Fair
State Route 99 NB over 15TH Street	1962	51,000	Fair
State Route 99 over West 16TH St UP RR	2013	51,000	Fair
State Route 99 over UPRR & 16TH Street	2015	51,000	Fair
State Route 99 over Athlone Drain	2015	39,000	Good
State Route 99 SB over El Capitan Way	1980	37,000	Fair