US Bridges

B63 (480th St) over Montgomery Creek

Good

Clay County, Iowa · 094362401 · Structure no. 000000000020461

Built
2014
11 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete
Length
35 ft
2 main spans
Daily traffic
369
2022 count
Owner
County
County Highway Agency

About this bridge

B63 (480th St) over Montgomery Creek is a concrete culvert carrying B63 (480th St) over Montgomery Creek in Clay County, Iowa. It was built in 2014, so it is 11 years old, younger than the Iowa average of 45.5 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 369 vehicles a day, roughly 30% of them trucks, projected to reach 369 by 2043. The structure is 35 ft (10.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesB63 (480th St)
CrossesMontgomery Creek
Location094362401
RouteCounty Highway 0
CountyClay County
StateIowa
Coordinates42.95319, -95.04636
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length35 ft (10.8 m)
Longest span17 ft (5.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic369 (2022)
Projected traffic369 by 2043
Trucks30%
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 B63 (480th St) over Montgomery Creek built?

It was built in 2014, making it 11 years old in 2025.

What condition is B63 (480th St) over Montgomery Creek 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 March 2023.

How much traffic does B63 (480th St) over Montgomery Creek carry?

About 369 vehicles per day (2022 count), of which roughly 30% are trucks.

How long is B63 (480th St) over Montgomery Creek?

The structure is 35 ft (10.8 m) long with a longest span of 17 ft (5.2 m).

Who owns B63 (480th St) over Montgomery Creek?

It is owned by the County Highway Agency.