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Dart Hill Road over Hockanum River

Tolland County, Connecticut · rated Good in the 2025 National Bridge Inventory

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

Dart Hill Road over Hockanum River in Tolland County, Connecticut, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 2023, making it 2 years old at the 2025 inventory.
It carries about 4,700 vehicles a day (traffic count year 2020).
Its listed owner is a town or township highway agency.
It is one of 74 of the 207 inventoried bridges in Tolland County rated good (35.7%); 17 (8.2%) 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 50 ft
Location	1000 Ft West of Route 83
NBI structure number	03936
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Interstate-84 over Cider Mill Road	1954	71,600	Fair
Interstate-84 over Skungamaug River	1954	64,200	Fair
Interstate-84 over Willimantic River	1953	58,100	Fair
Interstate-84 over New England Central RR	1953	58,100	Fair
I-84 EB & Ramp 061 over Hockanum River	1981	54,800	Fair
Interstate-84 over Roaring Brook	1940	54,200	Fair