US Bridges

US178 over Browns Mill Creek

Poor

Transylvania County, North Carolina · .06 MI.S.JCT.SR1156 · Structure no. 000000001750021

Built
1978
47 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
165 ft
3 main spans
Daily traffic
1,200
2022 count
Owner
State
State Highway Agency

About this bridge

US178 over Browns Mill Creek is a steel stringer/multi-beam or girder carrying US178 over Browns Mill Creek in Transylvania County, North Carolina. It was built in 1978, so it is 47 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,200 vehicles a day, roughly 6% of them trucks, projected to reach 2,400 by 2040. The structure is 165 ft (50.2 m) long and 47 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

CarriesUS178
CrossesBrowns Mill Creek
Location.06 MI.S.JCT.SR1156
RouteU.S. Route 178
Coordinates35.14233, -82.82422
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80.9 US tons
Inventory rating48.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length165 ft (50.2 m)
Longest span55 ft (16.7 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2022)
Projected traffic2,400 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US178 over Browns Mill Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is US178 over Browns Mill Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does US178 over Browns Mill Creek carry?

About 1,200 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is US178 over Browns Mill Creek?

The structure is 165 ft (50.2 m) long with a longest span of 55 ft (16.7 m) and a deck 47 ft wide.

Who owns US178 over Browns Mill Creek?

It is owned by the State Highway Agency.