US Bridges

Forum Blvd over Mill CR

Fair

Boone County, Missouri · S 34 T 48 N R 13 W · Structure no. 15434

Built
1986
39 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete
Length
33 ft
2 main spans
Daily traffic
6,050
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Forum Blvd over Mill CR is a concrete culvert carrying Forum Blvd over Mill CR in Boone County, Missouri. It was built in 1986, so it is 39 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 6,050 vehicles a day, roughly 5% of them trucks, projected to reach 10,588 by 2043. The structure is 33 ft (10.1 m) long and 38 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesForum Blvd
CrossesMill CR
LocationS 34 T 48 N R 13 W
RouteCity Street 0
CountyBoone County
StateMissouri
Coordinates38.90551, -92.35473
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span16 ft (4.9 m)
Deck width38 ft (11.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,050 (2023)
Projected traffic10,588 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$153,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Forum Blvd over Mill CR built?

It was built in 1986, making it 39 years old in 2025.

What condition is Forum Blvd over Mill 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 December 2024.

How much traffic does Forum Blvd over Mill CR carry?

About 6,050 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Forum Blvd over Mill CR?

The structure is 33 ft (10.1 m) long with a longest span of 16 ft (4.9 m) and a deck 38 ft wide.

Who owns Forum Blvd over Mill CR?

It is owned by the City or Municipal Highway Agency.