US Bridges

Isaac Miller Trail over Mid Fk Grand Rvr

Fair

Gentry County, Missouri · S 11 T 62 N R 31 W · Structure no. 17017

Built
1989
36 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
283 ft
3 main spans
Daily traffic
150
2024 count
Owner
County
County Highway Agency

About this bridge

Isaac Miller Trail over Mid Fk Grand Rvr is a steel stringer/multi-beam or girder carrying Isaac Miller Trail over Mid Fk Grand Rvr in Gentry County, Missouri. It was built in 1989, so it is 36 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 150 vehicles a day, roughly 10% of them trucks, projected to reach 173 by 2044. The structure is 283 ft (86.3 m) long and 27 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesIsaac Miller Trail
CrossesMid Fk Grand Rvr
LocationS 11 T 62 N R 31 W
RouteCounty Highway 140
CountyGentry County
StateMissouri
Coordinates40.1943, -94.35873
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length283 ft (86.3 m)
Longest span120 ft (36.6 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic173 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Isaac Miller Trail over Mid Fk Grand Rvr built?

It was built in 1989, making it 36 years old in 2025.

What condition is Isaac Miller Trail over Mid Fk Grand Rvr 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 2023.

How much traffic does Isaac Miller Trail over Mid Fk Grand Rvr carry?

About 150 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Isaac Miller Trail over Mid Fk Grand Rvr?

The structure is 283 ft (86.3 m) long with a longest span of 120 ft (36.6 m) and a deck 27 ft wide.

Who owns Isaac Miller Trail over Mid Fk Grand Rvr?

It is owned by the County Highway Agency.