US Bridges

Mt. Pleasant RD over Cache R. Overflow

Fair

Union County, Illinois · 1.7M N of Il 146 · Structure no. 091323200000000

Built
2008
17 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
81 ft
1 main span
Daily traffic
225
2020 count
Owner
County
County Highway Agency

About this bridge

Mt. Pleasant RD over Cache R. Overflow is a prestressed concrete box beam or girders - multiple carrying Mt. Pleasant RD over Cache R. Overflow in Union County, Illinois. It was built in 2008, so it is 17 years old, younger 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 225 vehicles a day, roughly 20% of them trucks, projected to reach 227 by 2046. The structure is 81 ft (24.8 m) long and 27 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesMt. Pleasant RD
CrossesCache R. Overflow
Location1.7M N of Il 146
RouteCounty Highway 0
CountyUnion County
StateIllinois
Coordinates37.46968, -89.07841
Functional classRural Minor Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length81 ft (24.8 m)
Longest span80 ft (24.3 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2020)
Projected traffic227 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Mt. Pleasant RD over Cache R. Overflow built?

It was built in 2008, making it 17 years old in 2025.

What condition is Mt. Pleasant RD over Cache R. Overflow 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 January 2025.

How much traffic does Mt. Pleasant RD over Cache R. Overflow carry?

About 225 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Mt. Pleasant RD over Cache R. Overflow?

The structure is 81 ft (24.8 m) long with a longest span of 80 ft (24.3 m) and a deck 27 ft wide.

Who owns Mt. Pleasant RD over Cache R. Overflow?

It is owned by the County Highway Agency.