US Bridges

CR 550N over Wolf Creek

Fair

Boone County, Indiana · 00.70 W of CR 900 W · Structure no. 0600091

Built
1920
105 years old, rebuilt 1980
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
3 main spans
Daily traffic
120
2017 count
Owner
County
County Highway Agency

About this bridge

CR 550N over Wolf Creek is a prestressed concrete box beam or girders - multiple carrying CR 550N over Wolf Creek in Boone County, Indiana. It was built in 1920 and reconstructed in 1980, so it is 105 years old, older than the Indiana average of 46.6 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 120 vehicles a day, roughly 3% of them trucks, projected to reach 180 by 2037. The structure is 62 ft (19 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCR 550N
CrossesWolf Creek
Location00.70 W of CR 900 W
RouteCounty Highway 550
CountyBoone County
StateIndiana
Coordinates40.11996, -86.6524
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating49.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length62 ft (19 m)
Longest span22 ft (6.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2017)
Projected traffic180 by 2037
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$458,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 550N over Wolf Creek built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1980.

What condition is CR 550N over Wolf 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 September 2023.

How much traffic does CR 550N over Wolf Creek carry?

About 120 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is CR 550N over Wolf Creek?

The structure is 62 ft (19 m) long with a longest span of 22 ft (6.8 m) and a deck 24 ft wide.

Who owns CR 550N over Wolf Creek?

It is owned by the County Highway Agency.