Foothill Ave over Rock Creek

Fair

Mitchell County, Iowa · 098183602 · Structure no. 000000000248241

Built: 1981; 44 years old
Condition: Fair; inspected December 2023
Type: Slab; Concrete Continuous
Length: 103 ft; 3 main spans
Daily traffic: 26; 2022 count
Owner: County; County Highway Agency

About this bridge

Foothill Ave over Rock Creek is a concrete continuous slab carrying Foothill Ave over Rock Creek in Mitchell County, Iowa. It was built in 1981, so it is 44 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 26 vehicles a day, projected to reach 26 by 2043. The structure is 103 ft (31.4 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesFoothill Ave

CrossesRock Creek

Location098183602

RouteCounty Highway 0

CountyMitchell County

StateIowa

Coordinates43.26466, -92.92505

Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	8 Very Good	No problems noted.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionDecember 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Deck geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating60 US tons

Inventory rating38 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length103 ft (31.4 m)

Longest span44 ft (13.4 m)

Deck width33 ft (10.1 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)

Projected traffic26 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was Foothill Ave over Rock Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Foothill Ave over Rock Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.

How much traffic does Foothill Ave over Rock Creek carry?

About 26 vehicles per day (2022 count).

How long is Foothill Ave over Rock Creek?

The structure is 103 ft (31.4 m) long with a longest span of 44 ft (13.4 m) and a deck 33 ft wide.

Who owns Foothill Ave over Rock Creek?

It is owned by the County Highway Agency.