US Bridges

R15 125th Ave over Grand River

Good

Decatur County, Iowa · 070271604 · Structure no. 000000000139081

Built
2018
7 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
366 ft
4 main spans
Daily traffic
219
2022 count
Owner
County
County Highway Agency

About this bridge

R15 125th Ave over Grand River is a prestressed concrete stringer/multi-beam or girder carrying R15 125th Ave over Grand River in Decatur County, Iowa. It was built in 2018, so it is 7 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 219 vehicles a day, roughly 20% of them trucks, projected to reach 219 by 2043. The structure is 366 ft (111.6 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesR15 125th Ave
CrossesGrand River
Location070271604
RouteCounty Highway 0
CountyDecatur County
StateIowa
Coordinates40.86748, -93.96681
Functional classRural Major 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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length366 ft (111.6 m)
Longest span102 ft (31.1 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic219 (2022)
Projected traffic219 by 2043
Trucks20%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was R15 125th Ave over Grand River built?

It was built in 2018, making it 7 years old in 2025.

What condition is R15 125th Ave over 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 November 2022.

How much traffic does R15 125th Ave over Grand River carry?

About 219 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is R15 125th Ave over Grand River?

The structure is 366 ft (111.6 m) long with a longest span of 102 ft (31.1 m) and a deck 33 ft wide.

Who owns R15 125th Ave over Grand River?

It is owned by the County Highway Agency.