US Bridges

Quincy Trail over Boyer River

Good

Harrison County, Iowa · 080422805 · Structure no. 000000000178691

Built
1994
31 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
246 ft
3 main spans
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

Quincy Trail over Boyer River is a prestressed concrete stringer/multi-beam or girder carrying Quincy Trail over Boyer River in Harrison County, Iowa. It was built in 1994, so it is 31 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 246 ft (75 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesQuincy Trail
CrossesBoyer River
Location080422805
RouteCounty Highway 0
CountyHarrison County
StateIowa
Coordinates41.70657, -95.73637
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating92.2 US tons
Inventory rating38.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length246 ft (75 m)
Longest span80 ft (24.4 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 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 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 Quincy Trail over Boyer River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Quincy Trail over Boyer River 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 2022.

How much traffic does Quincy Trail over Boyer River carry?

About 15 vehicles per day (2022 count).

How long is Quincy Trail over Boyer River?

The structure is 246 ft (75 m) long with a longest span of 80 ft (24.4 m) and a deck 27 ft wide.

Who owns Quincy Trail over Boyer River?

It is owned by the County Highway Agency.