US Bridges

Isaac Miller Trail over Stillhouse Br

Poor

Gentry County, Missouri · S 35 T 62 N R 31 W · Structure no. 24109

Built
1995
30 years old
Condition
Poor
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

Isaac Miller Trail over Stillhouse Br is a steel stringer/multi-beam or girder carrying Isaac Miller Trail over Stillhouse Br in Gentry County, Missouri. It was built in 1995, so it is 30 years old, younger 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2044. The structure is 70 ft (21.3 m) long and 18 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIsaac Miller Trail
CrossesStillhouse Br
LocationS 35 T 62 N R 31 W
RouteCounty Highway 458
CountyGentry County
StateMissouri
Coordinates40.13643, -94.35522
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.8 US tons
Inventory rating18.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length70 ft (21.3 m)
Longest span70 ft (21.3 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic40 by 2044
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$358,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Isaac Miller Trail over Stillhouse Br built?

It was built in 1995, making it 30 years old in 2025.

What condition is Isaac Miller Trail over Stillhouse Br 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 March 2023.

How much traffic does Isaac Miller Trail over Stillhouse Br carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Isaac Miller Trail over Stillhouse Br?

The structure is 70 ft (21.3 m) long with a longest span of 70 ft (21.3 m) and a deck 18 ft wide.

Who owns Isaac Miller Trail over Stillhouse Br?

It is owned by the County Highway Agency.