US Bridges

SR1780 over South Muddy Creek

Good

McDowell County, North Carolina · 2.4 MI.S.JCT.SR1802 · Structure no. 000000001110277

Built
2002
23 years old
Condition
Good
inspected June 2022
Type
Culvert
Steel
Length
32 ft
3 main spans
Daily traffic
240
2010 count
Owner
State
State Highway Agency

About this bridge

SR1780 over South Muddy Creek is a steel culvert carrying SR1780 over South Muddy Creek in McDowell County, North Carolina. It was built in 2002, so it is 23 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 240 vehicles a day, roughly 6% of them trucks, projected to reach 480 by 2040. The structure is 32 ft (9.7 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSR1780
CrossesSouth Muddy Creek
Location2.4 MI.S.JCT.SR1802
RouteState Highway 1780
Coordinates35.55015, -81.92476
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJune 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88 US tons
Inventory rating67.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length32 ft (9.7 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2010)
Projected traffic480 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 SR1780 over South Muddy Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is SR1780 over South Muddy Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2022.

How much traffic does SR1780 over South Muddy Creek carry?

About 240 vehicles per day (2010 count), of which roughly 6% are trucks.

How long is SR1780 over South Muddy Creek?

The structure is 32 ft (9.7 m) long with a longest span of 9 ft (2.7 m).

Who owns SR1780 over South Muddy Creek?

It is owned by the State Highway Agency.