US Bridges

Hillcrest RD over Br of Coon CR

Fair

Montgomery County, Missouri · S 18 T 50 N R 6 W · Structure no. 12171

Built
1975
50 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

Hillcrest RD over Br of Coon CR is a concrete culvert carrying Hillcrest RD over Br of Coon CR in Montgomery County, Missouri. It was built in 1975, so it is 50 years old, older 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 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 63 by 2043. The structure is 26 ft (7.9 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesHillcrest RD
CrossesBr of Coon CR
LocationS 18 T 50 N R 6 W
RouteCounty Highway 1
CountyMontgomery County
StateMissouri
Coordinates39.117, -91.63125
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadOther
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic63 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Hillcrest RD over Br of Coon CR built?

It was built in 1975, making it 50 years old in 2025.

What condition is Hillcrest RD over Br of Coon 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 February 2025.

How much traffic does Hillcrest RD over Br of Coon CR carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Hillcrest RD over Br of Coon CR?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 24 ft wide.

Who owns Hillcrest RD over Br of Coon CR?

It is owned by the County Highway Agency.