US Bridges

730th Ave over Minerva Creek

Good

Story County, Iowa · 0.3 MI S CO Line · Structure no. 000000000315681

Built
2020
5 years old
Condition
Good
inspected November 2022
Type
Slab
Concrete Continuous
Length
81 ft
3 main spans
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

730th Ave over Minerva Creek is a concrete continuous slab carrying 730th Ave over Minerva Creek in Story County, Iowa. It was built in 2020, so it is 5 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 30 vehicles a day, projected to reach 30 by 2043. The structure is 81 ft (24.6 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries730th Ave
CrossesMinerva Creek
Location0.3 MI S CO Line
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.20522, -93.25121
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2022
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 alignment8: Equal to present desirable criteria
Operating rating75.1 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length81 ft (24.6 m)
Longest span31 ft (9.4 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 730th Ave over Minerva Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is 730th Ave over Minerva 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 November 2022.

How much traffic does 730th Ave over Minerva Creek carry?

About 30 vehicles per day (2022 count).

How long is 730th Ave over Minerva Creek?

The structure is 81 ft (24.6 m) long with a longest span of 31 ft (9.4 m) and a deck 33 ft wide.

Who owns 730th Ave over Minerva Creek?

It is owned by the County Highway Agency.