US Bridges

Ill 92 FAP 599 over Mississippi River

Fair

Rock Island County, Illinois · In Muscatine · Structure no. 081991000000000

Built
1972
53 years old
Condition
Fair
inspected August 2023
Type
Truss - Thru
Steel
Length
3,018 ft
1 main span
Daily traffic
3,950
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 92 FAP 599 over Mississippi River is a steel truss - thru carrying Ill 92 FAP 599 over Mississippi River in Rock Island County, Illinois. It was built in 1972, so it is 53 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 3,950 vehicles a day, roughly 9% of them trucks, projected to reach 3,737 by 2046. The structure is 3,018 ft (919.9 m) long and 35 ft wide. If it were closed, the detour would be 52.2 mi (84 km).

Location

Open in Google Maps
CarriesIll 92 FAP 599
CrossesMississippi River
LocationIn Muscatine
RouteState Highway 92
CountyRock Island County
StateIllinois
Coordinates41.42126, -91.03321
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+23 approach)
Design loadHS 20
Structure length3,018 ft (919.9 m)
Longest span512 ft (156.1 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,950 (2023)
Projected traffic3,737 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed52.2 mi (84 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 92 FAP 599 over Mississippi River built?

It was built in 1972, making it 53 years old in 2025.

What condition is Ill 92 FAP 599 over Mississippi River 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 August 2023.

How much traffic does Ill 92 FAP 599 over Mississippi River carry?

About 3,950 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ill 92 FAP 599 over Mississippi River?

The structure is 3,018 ft (919.9 m) long with a longest span of 512 ft (156.1 m) and a deck 35 ft wide.

Who owns Ill 92 FAP 599 over Mississippi River?

It is owned by the State Highway Agency.