US Bridges

Gold Dust Trail over Br of N Blackbird

Good

Putnam County, Missouri · S 29 T 65 N R 17 W · Structure no. 20381

Built
1998
27 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

Gold Dust Trail over Br of N Blackbird is a steel stringer/multi-beam or girder carrying Gold Dust Trail over Br of N Blackbird in Putnam County, Missouri. It was built in 1998, so it is 27 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 45 ft (13.7 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesGold Dust Trail
CrossesBr of N Blackbird
LocationS 29 T 65 N R 17 W
RouteCounty Highway 257
Coordinates40.40223, -92.83465
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
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 rating98.2 US tons
Inventory rating85.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length45 ft (13.7 m)
Longest span44 ft (13.4 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic6 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Gold Dust Trail over Br of N Blackbird built?

It was built in 1998, making it 27 years old in 2025.

What condition is Gold Dust Trail over Br of N Blackbird in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does Gold Dust Trail over Br of N Blackbird carry?

About 5 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Gold Dust Trail over Br of N Blackbird?

The structure is 45 ft (13.7 m) long with a longest span of 44 ft (13.4 m) and a deck 18 ft wide.

Who owns Gold Dust Trail over Br of N Blackbird?

It is owned by the County Highway Agency.