US Bridges

Railsback Rd-Tr 27 over Little Mackinaw R.

FairPosted for load

Tazewell County, Illinois · S.CTR-7-T23NR2W · Structure no. 090316200000000

Built
1968
57 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
93 ft
2 main spans
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Railsback Rd-Tr 27 over Little Mackinaw R. is a steel continuous stringer/multi-beam or girder carrying Railsback Rd-Tr 27 over Little Mackinaw R. in Tazewell County, Illinois. It was built in 1968, so it is 57 years old, older 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 51 by 2046. The structure is 93 ft (28.3 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRailsback Rd-Tr 27
CrossesLittle Mackinaw R.
LocationS.CTR-7-T23NR2W
RouteCounty Highway 0
CountyTazewell County
StateIllinois
Coordinates40.45906, -89.37069
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length93 ft (28.3 m)
Longest span45 ft (13.7 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic51 by 2046
Trucks0%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Railsback Rd-Tr 27 over Little Mackinaw R. built?

It was built in 1968, making it 57 years old in 2025.

What condition is Railsback Rd-Tr 27 over Little Mackinaw R. 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 2024.

How much traffic does Railsback Rd-Tr 27 over Little Mackinaw R. carry?

About 50 vehicles per day (2023 count).

How long is Railsback Rd-Tr 27 over Little Mackinaw R.?

The structure is 93 ft (28.3 m) long with a longest span of 45 ft (13.7 m) and a deck 28 ft wide.

Who owns Railsback Rd-Tr 27 over Little Mackinaw R.?

It is owned by the Town or Township Highway Agency.