US Bridges

N Folk Hollow RD over Norfolk Creek

Good

Allamakee County, Iowa · 097051904 · Structure no. 000000000061931

Built
2017
8 years old
Condition
Good
inspected April 2022
Type
Slab
Concrete Continuous
Length
130 ft
3 main spans
Daily traffic
120
2023 count
Owner
County
County Highway Agency

About this bridge

N Folk Hollow RD over Norfolk Creek is a concrete continuous slab carrying N Folk Hollow RD over Norfolk Creek in Allamakee County, Iowa. It was built in 2017, so it is 8 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 120 vehicles a day, projected to reach 120 by 2043. The structure is 130 ft (39.6 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesN Folk Hollow RD
CrossesNorfolk Creek
Location097051904
RouteCounty Highway 0
CountyAllamakee County
StateIowa
Coordinates43.20842, -91.48665
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length130 ft (39.6 m)
Longest span51 ft (15.5 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2023)
Projected traffic120 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 N Folk Hollow RD over Norfolk Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is N Folk Hollow RD over Norfolk 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 April 2022.

How much traffic does N Folk Hollow RD over Norfolk Creek carry?

About 120 vehicles per day (2023 count).

How long is N Folk Hollow RD over Norfolk Creek?

The structure is 130 ft (39.6 m) long with a longest span of 51 ft (15.5 m) and a deck 27 ft wide.

Who owns N Folk Hollow RD over Norfolk Creek?

It is owned by the County Highway Agency.