US Bridges

270th ST over Middle Fork Grand River

Good

Ringgold County, Iowa · 068303501 · Structure no. 000000000296451

Built
2020
5 years old
Condition
Good
inspected December 2023
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

270th ST over Middle Fork Grand River is a concrete continuous slab carrying 270th ST over Middle Fork Grand River in Ringgold 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 40 vehicles a day, projected to reach 40 by 2043. The structure is 93 ft (28.3 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries270th ST
CrossesMiddle Fork Grand River
Location068303501
RouteCounty Highway 0
CountyRinggold County
StateIowa
Coordinates40.65335, -94.26215
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 inspectionDecember 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length93 ft (28.3 m)
Longest span35 ft (10.7 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 270th ST over Middle Fork Grand River built?

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

What condition is 270th ST over Middle Fork Grand 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 December 2023.

How much traffic does 270th ST over Middle Fork Grand River carry?

About 40 vehicles per day (2022 count).

How long is 270th ST over Middle Fork Grand River?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 26 ft wide.

Who owns 270th ST over Middle Fork Grand River?

It is owned by the County Highway Agency.