US Bridges

CR 550S over Fishback Creek

Fair

Boone County, Indiana · 00.45 W of CR 800 E · Structure no. 0600142

Built
1965
60 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
82 ft
3 main spans
Daily traffic
2,010
2017 count
Owner
County
County Highway Agency

About this bridge

CR 550S over Fishback Creek is a concrete continuous slab carrying CR 550S over Fishback Creek in Boone County, Indiana. It was built in 1965, so it is 60 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 2,010 vehicles a day, roughly 5% of them trucks, projected to reach 3,060 by 2037. The structure is 82 ft (25 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 550S
CrossesFishback Creek
Location00.45 W of CR 800 E
RouteCounty Highway 550
CountyBoone County
StateIndiana
Coordinates39.96127, -86.3251
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length82 ft (25 m)
Longest span32 ft (9.7 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,010 (2017)
Projected traffic3,060 by 2037
Trucks5%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 550S over Fishback Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is CR 550S over Fishback 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 550S over Fishback Creek carry?

About 2,010 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is CR 550S over Fishback Creek?

The structure is 82 ft (25 m) long with a longest span of 32 ft (9.7 m) and a deck 24 ft wide.

Who owns CR 550S over Fishback Creek?

It is owned by the County Highway Agency.