US Bridges

Route 318 over Morgan Brook

Fair

Litchfield County, Connecticut · 100 Feet East of Route 44 · Structure no. 01589

Built
1947
78 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
5,400
2021 count
Owner
State
State Highway Agency

About this bridge

Route 318 over Morgan Brook is a concrete slab carrying Route 318 over Morgan Brook in Litchfield County, Connecticut. It was built in 1947, so it is 78 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 6 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 5,400 vehicles a day, roughly 3% of them trucks, projected to reach 8,024 by 2041. The structure is 28 ft (8.5 m) long and 48 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRoute 318
CrossesMorgan Brook
Location100 Feet East of Route 44
RouteState Highway 318
CountyLitchfield County
StateConnecticut
Coordinates41.90844, -73.0006
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
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 rating55 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width48 ft (14.7 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2021)
Projected traffic8,024 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 318 over Morgan Brook built?

It was built in 1947, making it 78 years old in 2025.

What condition is Route 318 over Morgan 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 September 2024.

How much traffic does Route 318 over Morgan Brook carry?

About 5,400 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Route 318 over Morgan Brook?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 48 ft wide.

Who owns Route 318 over Morgan Brook?

It is owned by the State Highway Agency.