US Bridges

Irish Hollow RD over Br Upper Iowa River

Good

Allamakee County, Iowa · 100042005 · Structure no. 000000000063061

Built
2013
12 years old
Condition
Good
inspected April 2022
Type
Slab
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
39
2022 count
Owner
County
County Highway Agency

About this bridge

Irish Hollow RD over Br Upper Iowa River is a concrete continuous slab carrying Irish Hollow RD over Br Upper Iowa River in Allamakee County, Iowa. It was built in 2013, so it is 12 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 39 vehicles a day, projected to reach 39 by 2043. The structure is 73 ft (22.4 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIrish Hollow RD
CrossesBr Upper Iowa River
Location100042005
RouteCounty Highway 0
CountyAllamakee County
StateIowa
Coordinates43.47108, -91.34498
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.1 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length73 ft (22.4 m)
Longest span28 ft (8.5 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39 (2022)
Projected traffic39 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 Irish Hollow RD over Br Upper Iowa River built?

It was built in 2013, making it 12 years old in 2025.

What condition is Irish Hollow RD over Br Upper Iowa 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 April 2022.

How much traffic does Irish Hollow RD over Br Upper Iowa River carry?

About 39 vehicles per day (2022 count).

How long is Irish Hollow RD over Br Upper Iowa River?

The structure is 73 ft (22.4 m) long with a longest span of 28 ft (8.5 m) and a deck 27 ft wide.

Who owns Irish Hollow RD over Br Upper Iowa River?

It is owned by the County Highway Agency.