US Bridges

SR 550 over Maria Creek

Fair

Knox County, Indiana · 01.08 E US 41 · Structure no. 032930

Built
1937
88 years old, rebuilt 1982
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
144 ft
3 main spans
Daily traffic
2,048
2004 count
Owner
State
State Highway Agency

About this bridge

SR 550 over Maria Creek is a steel continuous stringer/multi-beam or girder carrying SR 550 over Maria Creek in Knox County, Indiana. It was built in 1937 and reconstructed in 1982, so it is 88 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 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 2,048 vehicles a day, roughly 10% of them trucks, projected to reach 3,401 by 2032. The structure is 144 ft (43.8 m) long and 36 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesSR 550
CrossesMaria Creek
Location01.08 E US 41
RouteState Highway 550
StateIndiana
Coordinates38.79486, -87.44001
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length144 ft (43.8 m)
Longest span55 ft (16.7 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,048 (2004)
Projected traffic3,401 by 2032
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 550 over Maria Creek built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1982.

What condition is SR 550 over Maria 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 SR 550 over Maria Creek carry?

About 2,048 vehicles per day (2004 count), of which roughly 10% are trucks.

How long is SR 550 over Maria Creek?

The structure is 144 ft (43.8 m) long with a longest span of 55 ft (16.7 m) and a deck 36 ft wide.

Who owns SR 550 over Maria Creek?

It is owned by the State Highway Agency.