US Bridges

SR1109 over I40

Fair

Forsyth County, North Carolina · 0.1 Mi. N. Jct. SR1141 · Structure no. 000000000670135

Built
1959
66 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
366 ft
5 main spans
Daily traffic
8,100
2019 count
Owner
State
State Highway Agency

About this bridge

SR1109 over I40 is a steel stringer/multi-beam or girder carrying SR1109 over I40 in Forsyth County, North Carolina. It was built in 1959, so it is 66 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 5 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 8,100 vehicles a day, roughly 7% of them trucks, projected to reach 16,200 by 2040. The structure is 366 ft (111.5 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR1109
CrossesI40
Location0.1 Mi. N. Jct. SR1141
RouteState Highway 1109
CountyForsyth County
StateNorth Carolina
Coordinates36.04139, -80.37554
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating37.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length366 ft (111.5 m)
Longest span74 ft (22.5 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,100 (2019)
Projected traffic16,200 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR1109 over I40 built?

It was built in 1959, making it 66 years old in 2025.

What condition is SR1109 over I40 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 December 2023.

How much traffic does SR1109 over I40 carry?

About 8,100 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is SR1109 over I40?

The structure is 366 ft (111.5 m) long with a longest span of 74 ft (22.5 m) and a deck 28 ft wide.

Who owns SR1109 over I40?

It is owned by the State Highway Agency.