US Bridges

R63 98th Ave over Middle River

Good

Warren County, Iowa · 076240404 · Structure no. 000000000334481

Built
2015
10 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
277 ft
3 main spans
Daily traffic
2,641
2022 count
Owner
County
County Highway Agency

About this bridge

R63 98th Ave over Middle River is a prestressed concrete stringer/multi-beam or girder carrying R63 98th Ave over Middle River in Warren County, Iowa. It was built in 2015, so it is 10 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 2,641 vehicles a day, roughly 8% of them trucks, projected to reach 2,641 by 2044. The structure is 277 ft (84.4 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesR63 98th Ave
CrossesMiddle River
Location076240404
RouteCounty Highway 0
CountyWarren County
StateIowa
Coordinates41.41603, -93.62106
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 protection8 Very GoodNo problems noted.
Last inspectionOctober 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 geometry4: Meets minimum tolerable limits to be left in place as is
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 spans3
Design loadHL 93
Structure length277 ft (84.4 m)
Longest span122 ft (37.2 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,641 (2022)
Projected traffic2,641 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 R63 98th Ave over Middle River built?

It was built in 2015, making it 10 years old in 2025.

What condition is R63 98th Ave over Middle 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 October 2024.

How much traffic does R63 98th Ave over Middle River carry?

About 2,641 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is R63 98th Ave over Middle River?

The structure is 277 ft (84.4 m) long with a longest span of 122 ft (37.2 m) and a deck 33 ft wide.

Who owns R63 98th Ave over Middle River?

It is owned by the County Highway Agency.