US Bridges

SR1720 over Norris Creek

Fair

Franklin County, North Carolina · 0.1 MI E JCT SR1721 · Structure no. 000000000690088

Built
1993
32 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
77 ft
2 main spans
Daily traffic
2,200
2021 count
Owner
State
State Highway Agency

About this bridge

SR1720 over Norris Creek is a prestressed concrete slab carrying SR1720 over Norris Creek in Franklin County, North Carolina. It was built in 1993, so it is 32 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 2,200 vehicles a day, roughly 7% of them trucks, projected to reach 4,400 by 2040. The structure is 77 ft (23.4 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR1720
CrossesNorris Creek
Location0.1 MI E JCT SR1721
RouteState Highway 1720
CountyFranklin County
StateNorth Carolina
Coordinates35.94432, -78.32347
Functional classRural Major 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 protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating64.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20 + Mod
Structure length77 ft (23.4 m)
Longest span39 ft (11.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2021)
Projected traffic4,400 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1720 over Norris Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is SR1720 over Norris 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 SR1720 over Norris Creek carry?

About 2,200 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is SR1720 over Norris Creek?

The structure is 77 ft (23.4 m) long with a longest span of 39 ft (11.8 m) and a deck 27 ft wide.

Who owns SR1720 over Norris Creek?

It is owned by the State Highway Agency.