US Bridges

Dillon Ave over Small Stream

Good

Buchanan County, Iowa · 090102206 · Structure no. 000000000084261

Built
2015
10 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
113
2022 count
Owner
County
County Highway Agency

About this bridge

Dillon Ave over Small Stream is a steel stringer/multi-beam or girder carrying Dillon Ave over Small Stream in Buchanan County, Iowa. It was built in 2015, so it is 10 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 113 vehicles a day, projected to reach 113 by 2044. The structure is 55 ft (16.8 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesDillon Ave
CrossesSmall Stream
Location090102206
RouteCounty Highway 0
CountyBuchanan County
StateIowa
Coordinates42.59007, -92.01312
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 protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating47.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length55 ft (16.8 m)
Longest span46 ft (13.9 m)
Deck width31 ft (9.6 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic113 (2022)
Projected traffic113 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-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 Dillon Ave over Small Stream built?

It was built in 2015, making it 10 years old in 2025.

What condition is Dillon Ave over Small Stream 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 January 2024.

How much traffic does Dillon Ave over Small Stream carry?

About 113 vehicles per day (2022 count).

How long is Dillon Ave over Small Stream?

The structure is 55 ft (16.8 m) long with a longest span of 46 ft (13.9 m) and a deck 31 ft wide.

Who owns Dillon Ave over Small Stream?

It is owned by the County Highway Agency.