US Bridges

Ansborough Ave over Trib to Miller Creek

Good

Black Hawk County, Iowa · 87-13-09-02-10 · Structure no. 000000000074241

Built
2010
15 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

Ansborough Ave over Trib to Miller Creek is a steel stringer/multi-beam or girder carrying Ansborough Ave over Trib to Miller Creek in Black Hawk County, Iowa. It was built in 2010, so it is 15 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 15 vehicles a day, projected to reach 15 by 2043. The structure is 35 ft (10.8 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesAnsborough Ave
CrossesTrib to Miller Creek
Location87-13-09-02-10
RouteCounty Highway 0
CountyBlack Hawk County
StateIowa
Coordinates42.36173, -92.37677
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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length35 ft (10.8 m)
Longest span34 ft (10.4 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 by 2043
Trucks0%
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 Ansborough Ave over Trib to Miller Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Ansborough Ave over Trib to Miller 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 November 2023.

How much traffic does Ansborough Ave over Trib to Miller Creek carry?

About 15 vehicles per day (2022 count).

How long is Ansborough Ave over Trib to Miller Creek?

The structure is 35 ft (10.8 m) long with a longest span of 34 ft (10.4 m) and a deck 31 ft wide.

Who owns Ansborough Ave over Trib to Miller Creek?

It is owned by the County Highway Agency.