US Bridges

SR1229 over L. Alligator Creek

Poor

Tyrrell County, North Carolina · 0.2 MI E. Jct. SR1221 · Structure no. 000000001770089

Built
1987
38 years old
Condition
Poor
inspected February 2024
Type
Slab
Concrete Continuous
Length
188 ft
5 main spans
Daily traffic
200
2015 count
Owner
State
State Highway Agency

About this bridge

SR1229 over L. Alligator Creek is a concrete continuous slab carrying SR1229 over L. Alligator Creek in Tyrrell County, North Carolina. It was built in 1987, so it is 38 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 200 vehicles a day, roughly 6% of them trucks, projected to reach 400 by 2040. The structure is 188 ft (57.3 m) long and 29 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSR1229
CrossesL. Alligator Creek
Location0.2 MI E. Jct. SR1221
RouteState Highway 1229
Coordinates35.94571, -76.12693
Functional classRural Local

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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 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 geometry5: 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 rating85 US tons
Inventory rating50.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length188 ft (57.3 m)
Longest span37 ft (11.2 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2015)
Projected traffic400 by 2040
Trucks6%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1229 over L. Alligator Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is SR1229 over L. Alligator 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 February 2024.

How much traffic does SR1229 over L. Alligator Creek carry?

About 200 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is SR1229 over L. Alligator Creek?

The structure is 188 ft (57.3 m) long with a longest span of 37 ft (11.2 m) and a deck 29 ft wide.

Who owns SR1229 over L. Alligator Creek?

It is owned by the State Highway Agency.