US Bridges

Mss 6120 over Stream

Fair

Calhoun County, Illinois · N County RD Inhardin · Structure no. 007501200000000

Built
1950
75 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
29 ft
1 main span
Daily traffic
125
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mss 6120 over Stream is a concrete slab carrying Mss 6120 over Stream in Calhoun County, Illinois. It was built in 1950, so it is 75 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 125 vehicles a day, roughly 18% of them trucks, projected to reach 152 by 2046. The structure is 29 ft (8.8 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMss 6120
CrossesStream
LocationN County RD Inhardin
RouteCity Street 0
CountyCalhoun County
StateIllinois
Coordinates39.15896, -90.61826
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating35.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span27 ft (8.2 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2022)
Projected traffic152 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Mss 6120 over Stream built?

It was built in 1950, making it 75 years old in 2025.

What condition is Mss 6120 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 July 2023.

How much traffic does Mss 6120 over Stream carry?

About 125 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Mss 6120 over Stream?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.2 m) and a deck 22 ft wide.

Who owns Mss 6120 over Stream?

It is owned by the City or Municipal Highway Agency.