US Bridges

Spencer Ave over Pigeon Creek

Good

Harrison County, Iowa · 078421004 · Structure no. 000000000177271

Built
2008
17 years old
Condition
Good
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
217 ft
3 main spans
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

Spencer Ave over Pigeon Creek is a prestressed concrete stringer/multi-beam or girder carrying Spencer Ave over Pigeon Creek in Harrison County, Iowa. It was built in 2008, so it is 17 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 45 vehicles a day, projected to reach 45 by 2043. The structure is 217 ft (66.1 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSpencer Ave
CrossesPigeon Creek
Location078421004
RouteCounty Highway 0
CountyHarrison County
StateIowa
Coordinates41.56777, -95.65103
Functional classRural Minor Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
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 alignment6: Equal to present minimum criteria
Operating rating58.8 US tons
Inventory rating35.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length217 ft (66.1 m)
Longest span77 ft (23.5 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 by 2043
Trucks0%
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 Spencer Ave over Pigeon Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Spencer Ave over Pigeon 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 December 2022.

How much traffic does Spencer Ave over Pigeon Creek carry?

About 45 vehicles per day (2022 count).

How long is Spencer Ave over Pigeon Creek?

The structure is 217 ft (66.1 m) long with a longest span of 77 ft (23.5 m) and a deck 27 ft wide.

Who owns Spencer Ave over Pigeon Creek?

It is owned by the County Highway Agency.