US Bridges

Emerald Mound TR 2 over Little Silver CR

Fair

St. Clair County, Illinois · 1.25 MI NE Ill 4 · Structure no. 082401300000000

Built
1964
61 years old
Condition
Fair
inspected February 2023
Type
Channel Beam
Concrete
Length
86 ft
3 main spans
Daily traffic
25
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Emerald Mound TR 2 over Little Silver CR is a concrete channel beam carrying Emerald Mound TR 2 over Little Silver CR in St. Clair County, Illinois. It was built in 1964, so it is 61 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 5 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, roughly 20% of them trucks, projected to reach 25 by 2046. The structure is 86 ft (26.2 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesEmerald Mound TR 2
CrossesLittle Silver CR
Location1.25 MI NE Ill 4
RouteCounty Highway 0
CountySt. Clair County
StateIllinois
Coordinates38.65131, -89.79018
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 15
Structure length86 ft (26.2 m)
Longest span30 ft (9.1 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic25 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Emerald Mound TR 2 over Little Silver CR built?

It was built in 1964, making it 61 years old in 2025.

What condition is Emerald Mound TR 2 over Little Silver CR 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 February 2023.

How much traffic does Emerald Mound TR 2 over Little Silver CR carry?

About 25 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is Emerald Mound TR 2 over Little Silver CR?

The structure is 86 ft (26.2 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns Emerald Mound TR 2 over Little Silver CR?

It is owned by the Town or Township Highway Agency.