US Bridges

Ill 136 over Mississippi Rv & RR

Fair

Whiteside County, Illinois · In North Clinton · Structure no. 098990800000000

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Truss - Thru
Steel
Length
3,012 ft
3 main spans
Daily traffic
10,500
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 136 over Mississippi Rv & RR is a steel truss - thru carrying Ill 136 over Mississippi Rv & RR in Whiteside County, Illinois. It was built in 1974, so it is 51 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 10,500 vehicles a day, roughly 5% of them trucks, projected to reach 10,807 by 2046. The structure is 3,012 ft (918.1 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIll 136
CrossesMississippi Rv & RR
LocationIn North Clinton
RouteState Highway 136
CountyWhiteside County
StateIllinois
Coordinates41.86472, -90.17299
Functional classUrban Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating46.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+22 approach)
Design loadHS 20
Structure length3,012 ft (918.1 m)
Longest span500 ft (152.4 m)
Deck width33 ft (10.1 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2023)
Projected traffic10,807 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed6.2 mi (10 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Ill 136 over Mississippi Rv & RR built?

It was built in 1974, making it 51 years old in 2025.

What condition is Ill 136 over Mississippi Rv & RR 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 September 2023.

How much traffic does Ill 136 over Mississippi Rv & RR carry?

About 10,500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Ill 136 over Mississippi Rv & RR?

The structure is 3,012 ft (918.1 m) long with a longest span of 500 ft (152.4 m) and a deck 33 ft wide.

Who owns Ill 136 over Mississippi Rv & RR?

It is owned by the State Highway Agency.