US Bridges

ST Marys Road over Stream

Fair

Lee County, Illinois · 7.5 MI S of Amboy · Structure no. 052440600000000

Built
1971
54 years old
Condition
Fair
inspected January 2025
Type
Culvert
Steel
Length
35 ft
2 main spans
Daily traffic
25
2017 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

ST Marys Road over Stream is a steel culvert carrying ST Marys Road over Stream in Lee County, Illinois. It was built in 1971, so it is 54 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.

It carries about 25 vehicles a day, projected to reach 25 by 2046. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesST Marys Road
CrossesStream
Location7.5 MI S of Amboy
RouteCounty Highway 0
CountyLee County
StateIllinois
Coordinates41.59941, -89.32276
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span17 ft (5.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2017)
Projected traffic25 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 ST Marys Road over Stream built?

It was built in 1971, making it 54 years old in 2025.

What condition is ST Marys Road over Stream 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 2025.

How much traffic does ST Marys Road over Stream carry?

About 25 vehicles per day (2017 count).

How long is ST Marys Road over Stream?

The structure is 35 ft (10.7 m) long with a longest span of 17 ft (5.2 m).

Who owns ST Marys Road over Stream?

It is owned by the Town or Township Highway Agency.