US Bridges

Route 58 over Samp Mortar Reservoir

Fair

Fairfield County, Connecticut · 50 South of Arrowhead LA · Structure no. 01024

Built
1941
84 years old
Condition
Fair
inspected January 2023
Type
Tee Beam
Concrete
Length
33 ft
1 main span
Daily traffic
15,700
2020 count
Owner
State
State Highway Agency

About this bridge

Route 58 over Samp Mortar Reservoir is a concrete tee beam carrying Route 58 over Samp Mortar Reservoir in Fairfield 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 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 15,700 vehicles a day, roughly 10% of them trucks, projected to reach 23,329 by 2040. The structure is 33 ft (10.1 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRoute 58
CrossesSamp Mortar Reservoir
Location50 South of Arrowhead LA
RouteState Highway 58
Coordinates41.19244, -73.26018
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.7 US tons
Inventory rating48.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length33 ft (10.1 m)
Longest span29 ft (8.8 m)
Deck width43 ft (13.1 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,700 (2020)
Projected traffic23,329 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 58 over Samp Mortar Reservoir built?

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

What condition is Route 58 over Samp Mortar Reservoir 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 January 2023.

How much traffic does Route 58 over Samp Mortar Reservoir carry?

About 15,700 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Route 58 over Samp Mortar Reservoir?

The structure is 33 ft (10.1 m) long with a longest span of 29 ft (8.8 m) and a deck 43 ft wide.

Who owns Route 58 over Samp Mortar Reservoir?

It is owned by the State Highway Agency.