US Bridges

Key Ave over Pilot Grove CR

Poor

Daviess County, Missouri · S 21 T 60 N R 27 W · Structure no. 23675

Built
1910
115 years old, rebuilt 1983
Condition
Poor
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
105 ft
3 main spans
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

Key Ave over Pilot Grove CR is a steel stringer/multi-beam or girder carrying Key Ave over Pilot Grove CR in Daviess County, Missouri. It was built in 1910 and reconstructed in 1983, so it is 115 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 29 by 2044. The structure is 105 ft (32 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesKey Ave
CrossesPilot Grove CR
LocationS 21 T 60 N R 27 W
RouteCounty Highway 424
Coordinates39.98999, -93.92739
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.7 US tons
Inventory rating25.8 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans3
Design loadOther
Structure length105 ft (32 m)
Longest span50 ft (15.2 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic29 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$749,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Key Ave over Pilot Grove CR built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1983.

What condition is Key Ave over Pilot Grove CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2024.

How much traffic does Key Ave over Pilot Grove CR carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Key Ave over Pilot Grove CR?

The structure is 105 ft (32 m) long with a longest span of 50 ft (15.2 m) and a deck 16 ft wide.

Who owns Key Ave over Pilot Grove CR?

It is owned by the County Highway Agency.