US Bridges

Park Road TR 515A over I255 & Harding Ditch

Fair

St. Clair County, Illinois · Frank Holten State Park · Structure no. 082023300000000

Built
1981
44 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
443 ft
4 main spans
Daily traffic
200
2024 count
Owner
State
State Highway Agency

About this bridge

Park Road TR 515A over I255 & Harding Ditch is a steel continuous stringer/multi-beam or girder carrying Park Road TR 515A over I255 & Harding Ditch in St. Clair County, Illinois. It was built in 1981, so it is 44 years old, younger than the Illinois average of 45.3 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 303 by 2046. The structure is 443 ft (134.9 m) long and 46 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesPark Road TR 515A
CrossesI255 & Harding Ditch
LocationFrank Holten State Park
CountySt. Clair County
StateIllinois
Coordinates38.59353, -90.09117
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length443 ft (134.9 m)
Longest span113 ft (34.4 m)
Deck width46 ft (13.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2024)
Projected traffic303 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.9 mi (3 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 Park Road TR 515A over I255 & Harding Ditch built?

It was built in 1981, making it 44 years old in 2025.

What condition is Park Road TR 515A over I255 & Harding Ditch 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 January 2023.

How much traffic does Park Road TR 515A over I255 & Harding Ditch carry?

About 200 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Park Road TR 515A over I255 & Harding Ditch?

The structure is 443 ft (134.9 m) long with a longest span of 113 ft (34.4 m) and a deck 46 ft wide.

Who owns Park Road TR 515A over I255 & Harding Ditch?

It is owned by the State Highway Agency.