US Bridges

Dolphin Ave over Unnamed Str

Good

Macon County, Missouri · S 29 T 58 N R 16 W · Structure no. 25065

Built
1995
30 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

Dolphin Ave over Unnamed Str is a steel stringer/multi-beam or girder carrying Dolphin Ave over Unnamed Str in Macon 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 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 17 by 2044. The structure is 31 ft (9.4 m) long and 18 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesDolphin Ave
CrossesUnnamed Str
LocationS 29 T 58 N R 16 W
RouteCounty Highway 613
CountyMacon County
StateMissouri
Coordinates39.80812, -92.71412
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 protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating58.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length31 ft (9.4 m)
Longest span29 ft (8.8 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic17 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Dolphin Ave over Unnamed Str built?

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

What condition is Dolphin Ave over Unnamed Str 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 2024.

How much traffic does Dolphin Ave over Unnamed Str carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Dolphin Ave over Unnamed Str?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.8 m) and a deck 18 ft wide.

Who owns Dolphin Ave over Unnamed Str?

It is owned by the County Highway Agency.