US Bridges

SR1645 over Little Briar Creek

Fair

Wake County, North Carolina · 0.1 Mi.W. of I540 · Structure no. 000000001830046

Built
1994
31 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
35 ft
Daily traffic
19,500
2019 count
Owner
State
State Highway Agency

About this bridge

SR1645 over Little Briar Creek is a concrete continuous culvert carrying SR1645 over Little Briar Creek in Wake County, North Carolina. It was built in 1994, so it is 31 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 19,500 vehicles a day, roughly 7% of them trucks, projected to reach 39,000 by 2040. The structure is 35 ft (10.6 m) long. If it were closed, the detour would be 8.7 mi (14 km).

CarriesSR1645
CrossesLittle Briar Creek
Location0.1 Mi.W. of I540
RouteState Highway 1645
Coordinates35.89981, -78.7875
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87 US tons
Inventory rating66.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans0
Design loadHS 20 + Mod
Structure length35 ft (10.6 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,500 (2019)
Projected traffic39,000 by 2040
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 SR1645 over Little Briar Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is SR1645 over Little Briar Creek 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 May 2023.

How much traffic does SR1645 over Little Briar Creek carry?

About 19,500 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is SR1645 over Little Briar Creek?

The structure is 35 ft (10.6 m) long with a longest span of 11 ft (3.3 m).

Who owns SR1645 over Little Briar Creek?

It is owned by the State Highway Agency.