US Bridges

Dolphin Ave over Hickory Creek

Good

Clayton County, Iowa · Dolphin Ave · Structure no. 000000000121121

Built
2013
12 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
98
2022 count
Owner
County
County Highway Agency

About this bridge

Dolphin Ave over Hickory Creek is a concrete continuous slab carrying Dolphin Ave over Hickory Creek in Clayton 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 98 vehicles a day, projected to reach 98 by 2044. The structure is 100 ft (30.5 m) long and 33 ft wide.

CarriesDolphin Ave
CrossesHickory Creek
LocationDolphin Ave
RouteCounty Highway 0
StateIowa
Coordinates43.07201, -91.45472
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.5 US tons
Inventory rating44.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length100 ft (30.5 m)
Longest span39 ft (11.9 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic98 (2022)
Projected traffic98 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Dolphin Ave over Hickory Creek built?

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

What condition is Dolphin Ave over Hickory 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 September 2024.

How much traffic does Dolphin Ave over Hickory Creek carry?

About 98 vehicles per day (2022 count).

How long is Dolphin Ave over Hickory Creek?

The structure is 100 ft (30.5 m) long with a longest span of 39 ft (11.9 m) and a deck 33 ft wide.

Who owns Dolphin Ave over Hickory Creek?

It is owned by the County Highway Agency.