US Bridges

Route 188 over Long Swamp Brook

Fair

New Haven County, Connecticut · 0.4 MI S of I-84 · Structure no. 01507

Built
1944
81 years old, rebuilt 1986
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete
Length
25 ft
1 main span
Daily traffic
4,400
2023 count
Owner
State
State Highway Agency

About this bridge

Route 188 over Long Swamp Brook is a concrete tee beam carrying Route 188 over Long Swamp Brook in New Haven County, Connecticut. It was built in 1944 and reconstructed in 1986, so it is 81 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 4,400 vehicles a day, roughly 3% of them trucks, projected to reach 6,538 by 2043. The structure is 25 ft (7.6 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRoute 188
CrossesLong Swamp Brook
Location0.4 MI S of I-84
RouteState Highway 188
CountyNew Haven County
StateConnecticut
Coordinates41.52755, -73.09619
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.4 US tons
Inventory rating30.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2023)
Projected traffic6,538 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Route 188 over Long Swamp Brook built?

It was built in 1944, making it 81 years old in 2025. It was reconstructed in 1986.

What condition is Route 188 over Long Swamp Brook 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 October 2024.

How much traffic does Route 188 over Long Swamp Brook carry?

About 4,400 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Route 188 over Long Swamp Brook?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 35 ft wide.

Who owns Route 188 over Long Swamp Brook?

It is owned by the State Highway Agency.