US Bridges

Old Grassy Hill RD over Wepawaug River

Fair

New Haven County, Connecticut · 0.1 MI E of Route 121 · Structure no. 04098

Built
1941
84 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete
Length
43 ft
1 main span
Daily traffic
6,400
2012 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Old Grassy Hill RD over Wepawaug River is a concrete tee beam carrying Old Grassy Hill RD over Wepawaug River in New Haven County, Connecticut. It was built in 1941, so it is 84 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 6,400 vehicles a day, roughly 4% of them trucks, projected to reach 9,510 by 2032. The structure is 43 ft (13.1 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesOld Grassy Hill RD
CrossesWepawaug River
Location0.1 MI E of Route 121
RouteCity Street 0
Coordinates41.28593, -73.03981
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span40 ft (12.2 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,400 (2012)
Projected traffic9,510 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Grassy Hill RD over Wepawaug River built?

It was built in 1941, making it 84 years old in 2025.

What condition is Old Grassy Hill RD over Wepawaug River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does Old Grassy Hill RD over Wepawaug River carry?

About 6,400 vehicles per day (2012 count), of which roughly 4% are trucks.

How long is Old Grassy Hill RD over Wepawaug River?

The structure is 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 33 ft wide.

Who owns Old Grassy Hill RD over Wepawaug River?

It is owned by the Town or Township Highway Agency.