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Casstown-sidney over Middle Branch Lost Creek

Miami County, Ohio · rated Poor in the 2025 National Bridge Inventory

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

Casstown-sidney over Middle Branch Lost Creek in Miami County, Ohio, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1961, making it 64 years old at the 2025 inventory.
It carries about 797 vehicles a day (traffic count year 2015).
Its listed owner is the county highway agency.
It is one of 18 of the 312 inventoried bridges in Miami County rated poor (5.8%); 18 (5.8%) 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	Prestressed concrete multiple box beam
Length	about 79 ft
Location	0.08 S of TR188
NBI structure number	5531144
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Ir 75 over Ext of Boone Creek	2001	66,840	Good
Ir-75 over Clayton Ext. of Peters C	1957	66,840	Good
Ir-75 over W. Branch of Peters Cree	1957	66,840	Good
Ir-75 over Branch Great Miami River	1957	54,110	Fair
Ir-75 over County Ditch	1957	54,110	Fair
Ir-75 over Howell Extension Ditch	1957	54,110	Good