US Bridges

S.R. 521 over Little Walnut Creek

Fair

Delaware County, Ohio · 2.82 MI E. of S71 · Structure no. 2103664

Built
1958
67 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
53 ft
3 main spans
Daily traffic
1,759
2015 count
Owner
State
State Highway Agency

About this bridge

S.R. 521 over Little Walnut Creek is a concrete continuous slab carrying S.R. 521 over Little Walnut Creek in Delaware County, Ohio. It was built in 1958, so it is 67 years old, older than the Ohio average of 47.3 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 1,759 vehicles a day, roughly 11% of them trucks, projected to reach 2,441 by 2035. The structure is 53 ft (16.3 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesS.R. 521
CrossesLittle Walnut Creek
Location2.82 MI E. of S71
RouteState Highway 521
CountyDelaware County
StateOhio
Coordinates40.32063, -82.84601
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 12 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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length53 ft (16.3 m)
Longest span20 ft (6.1 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,759 (2015)
Projected traffic2,441 by 2035
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 S.R. 521 over Little Walnut Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is S.R. 521 over Little Walnut 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 November 2024.

How much traffic does S.R. 521 over Little Walnut Creek carry?

About 1,759 vehicles per day (2015 count), of which roughly 11% are trucks.

How long is S.R. 521 over Little Walnut Creek?

The structure is 53 ft (16.3 m) long with a longest span of 20 ft (6.1 m) and a deck 28 ft wide.

Who owns S.R. 521 over Little Walnut Creek?

It is owned by the State Highway Agency.