US Bridges

US221BYP NC181 over Grandmother Creek

Poor

Avery County, North Carolina · 100 FT.N.JCT.SR1545 · Structure no. 000000000110164

Built
1990
35 years old
Condition
Poor
inspected March 2024
Type
Culvert
Concrete Continuous
Length
28 ft
1 main span
Daily traffic
6,400
2022 count
Owner
State
State Highway Agency

About this bridge

US221BYP NC181 over Grandmother Creek is a concrete continuous culvert carrying US221BYP NC181 over Grandmother Creek in Avery County, North Carolina. It was built in 1990, so it is 35 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 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 6,400 vehicles a day, roughly 14% of them trucks, projected to reach 12,800 by 2040. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 2.5 mi (4 km).

CarriesUS221BYP NC181
CrossesGrandmother Creek
Location100 FT.N.JCT.SR1545
RouteU.S. Route 221
Coordinates36.05356, -81.88198
Functional classRural Principal Arterial - Other

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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 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
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
MaterialConcrete Continuous
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length28 ft (8.5 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,400 (2022)
Projected traffic12,800 by 2040
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

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 US221BYP NC181 over Grandmother Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is US221BYP NC181 over Grandmother 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 March 2024.

How much traffic does US221BYP NC181 over Grandmother Creek carry?

About 6,400 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is US221BYP NC181 over Grandmother Creek?

The structure is 28 ft (8.5 m) long with a longest span of 13 ft (3.9 m).

Who owns US221BYP NC181 over Grandmother Creek?

It is owned by the State Highway Agency.