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Garman Rd over Carnahan Ditch

Allen County, Indiana · rated Good in the 2025 National Bridge Inventory

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

Garman Rd over Carnahan Ditch in Allen County, Indiana, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1973, making it 52 years old at the 2025 inventory.
It carries about 244 vehicles a day (traffic count year 2018).
Its listed owner is the county highway agency.
It is one of 257 of the 615 inventoried bridges in Allen County rated good (41.8%); 45 (7.3%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 26 ft
Location	00.30 W Lochner Road
NBI structure number	0200027
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-69 over Durnell Ditch	1961	59,380	Fair
I-469 over Martin Ditch	1995	44,507	Good
I-469 over Swift Ditch	1995	44,507	Fair
W Jefferson Blvd over Moorman Drain	1948	38,000	Fair
W Jefferson Blvd over Natural Drain	1930	38,000	Fair
I-69 over Graham Mccullough Dit #4	1964	36,360	Good