US Bridges

SR1478 over Miller Creek

Fair

Catawba County, North Carolina · 0.4 Mi. E. Jct. SR1468 · Structure no. 000000000350292

Built
1980
45 years old
Condition
Fair
inspected January 2025
Type
Culvert
Steel
Length
21 ft
2 main spans
Daily traffic
3,300
2019 count
Owner
State
State Highway Agency

About this bridge

SR1478 over Miller Creek is a steel culvert carrying SR1478 over Miller Creek in Catawba County, North Carolina. It was built in 1980, so it is 45 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 3,300 vehicles a day, roughly 7% of them trucks, projected to reach 6,600 by 2040. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR1478
CrossesMiller Creek
Location0.4 Mi. E. Jct. SR1468
RouteState Highway 1478
CountyCatawba County
StateNorth Carolina
Coordinates35.70935, -81.2737
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length21 ft (6.4 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2019)
Projected traffic6,600 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 SR1478 over Miller Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is SR1478 over Miller 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 January 2025.

How much traffic does SR1478 over Miller Creek carry?

About 3,300 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is SR1478 over Miller Creek?

The structure is 21 ft (6.4 m) long with a longest span of 8 ft (2.4 m).

Who owns SR1478 over Miller Creek?

It is owned by the State Highway Agency.