US Bridges

SR3998 over I277 & US74

Fair

Mecklenburg County, North Carolina · 0.12 Mi. S. Jct. Brooklyn · Structure no. 000000001190489

Built
1986
39 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
323 ft
3 main spans
Daily traffic
59,000
2022 count
Owner
State
State Highway Agency

About this bridge

SR3998 over I277 & US74 is a steel stringer/multi-beam or girder carrying SR3998 over I277 & US74 in Mecklenburg County, North Carolina. It was built in 1986, so it is 39 years old, older 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 59,000 vehicles a day, roughly 6% of them trucks, projected to reach 118,000 by 2040. The structure is 323 ft (98.4 m) long and 119 ft wide.

CarriesSR3998
CrossesI277 & US74
Location0.12 Mi. S. Jct. Brooklyn
RouteState Highway 3998
Coordinates35.21928, -80.84679
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating72 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length323 ft (98.4 m)
Longest span133 ft (40.5 m)
Deck width119 ft (36.2 m)
Roadway width97 ft (29.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,000 (2022)
Projected traffic118,000 by 2040
Trucks6%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR3998 over I277 & US74 built?

It was built in 1986, making it 39 years old in 2025.

What condition is SR3998 over I277 & US74 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 2024.

How much traffic does SR3998 over I277 & US74 carry?

About 59,000 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR3998 over I277 & US74?

The structure is 323 ft (98.4 m) long with a longest span of 133 ft (40.5 m) and a deck 119 ft wide.

Who owns SR3998 over I277 & US74?

It is owned by the State Highway Agency.