US Bridges

SR 100 over Olentangy River

Fair

Crawford County, Ohio · 2.72 MI S of SR 19 · Structure no. 1702858

Built
1961
64 years old, rebuilt 1998
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
147 ft
3 main spans
Daily traffic
964
2015 count
Owner
State
State Highway Agency

About this bridge

SR 100 over Olentangy River is a steel continuous stringer/multi-beam or girder carrying SR 100 over Olentangy River in Crawford County, Ohio. It was built in 1961 and reconstructed in 1998, so it is 64 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 6 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 964 vehicles a day, roughly 6% of them trucks, projected to reach 1,338 by 2035. The structure is 147 ft (44.9 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 100
CrossesOlentangy River
Location2.72 MI S of SR 19
RouteState Highway 100
CountyCrawford County
StateOhio
Coordinates40.74773, -82.90569
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length147 ft (44.9 m)
Longest span55 ft (16.8 m)
Deck width31 ft (9.6 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic964 (2015)
Projected traffic1,338 by 2035
Trucks6%
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 SR 100 over Olentangy River built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1998.

What condition is SR 100 over Olentangy River 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 May 2024.

How much traffic does SR 100 over Olentangy River carry?

About 964 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is SR 100 over Olentangy River?

The structure is 147 ft (44.9 m) long with a longest span of 55 ft (16.8 m) and a deck 31 ft wide.

Who owns SR 100 over Olentangy River?

It is owned by the State Highway Agency.