US Bridges

SR1632 over Eno River

Fair

Durham County, North Carolina · 0.6MI S.Jct SR1794 · Structure no. 000000000630030

Built
1990
35 years old
Condition
Fair
inspected August 2023
Type
Slab
Prestressed Concrete
Length
317 ft
7 main spans
Daily traffic
8,500
2021 count
Owner
State
State Highway Agency

About this bridge

SR1632 over Eno River is a prestressed concrete slab carrying SR1632 over Eno River in Durham County, North Carolina. It was built in 1990, so it is 35 years old, younger than the North Carolina average of 38.7 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 8,500 vehicles a day, roughly 7% of them trucks, projected to reach 17,000 by 2040. The structure is 317 ft (96.6 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSR1632
CrossesEno River
Location0.6MI S.Jct SR1794
RouteState Highway 1632
Coordinates36.08802, -78.82708
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating49.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length317 ft (96.6 m)
Longest span44 ft (13.4 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,500 (2021)
Projected traffic17,000 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1632 over Eno River built?

It was built in 1990, making it 35 years old in 2025.

What condition is SR1632 over Eno 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 August 2023.

How much traffic does SR1632 over Eno River carry?

About 8,500 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is SR1632 over Eno River?

The structure is 317 ft (96.6 m) long with a longest span of 44 ft (13.4 m) and a deck 33 ft wide.

Who owns SR1632 over Eno River?

It is owned by the State Highway Agency.