US Bridges

TR 1 (mercer Count over Unnamed Stream

Fair

Rock Island County, Illinois · 6 M S of Oak Grove · Structure no. 081501400000000

Built
1926
99 years old
Condition
Fair
inspected November 2022
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
25
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 1 (mercer Count over Unnamed Stream is a concrete culvert carrying TR 1 (mercer Count over Unnamed Stream in Rock Island County, Illinois. It was built in 1926, so it is 99 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 22 ft (6.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 1 (mercer Count
CrossesUnnamed Stream
Location6 M S of Oak Grove
RouteCounty Highway 0
CountyRock Island County
StateIllinois
Coordinates41.32779, -90.59216
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
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 alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic25 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 TR 1 (mercer Count over Unnamed Stream built?

It was built in 1926, making it 99 years old in 2025.

What condition is TR 1 (mercer Count over Unnamed 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 November 2022.

How much traffic does TR 1 (mercer Count over Unnamed Stream carry?

About 25 vehicles per day (2024 count).

How long is TR 1 (mercer Count over Unnamed Stream?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns TR 1 (mercer Count over Unnamed Stream?

It is owned by the Town or Township Highway Agency.