US Bridges

Firefly Ave over Mcelroy CR

Good

Atchison County, Missouri · S 20 T 66 N R 41 W · Structure no. 13634

Built
2000
25 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

Firefly Ave over Mcelroy CR is a steel stringer/multi-beam or girder carrying Firefly Ave over Mcelroy CR in Atchison County, Missouri. It was built in 2000, so it is 25 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 23 by 2044. The structure is 70 ft (21.3 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFirefly Ave
CrossesMcelroy CR
LocationS 20 T 66 N R 41 W
RouteCounty Highway 44
CountyAtchison County
StateMissouri
Coordinates40.52319, -95.57501
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 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 span68 ft (20.7 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic23 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Firefly Ave over Mcelroy CR built?

It was built in 2000, making it 25 years old in 2025.

What condition is Firefly Ave over Mcelroy CR 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 Firefly Ave over Mcelroy CR carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Firefly Ave over Mcelroy CR?

The structure is 70 ft (21.3 m) long with a longest span of 68 ft (20.7 m) and a deck 25 ft wide.

Who owns Firefly Ave over Mcelroy CR?

It is owned by the County Highway Agency.