US Bridges

G64 Stone ST over South River Branch

Good

Warren County, Iowa · 074251401 · Structure no. 000000000333381

Built
2023
2 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
113 ft
1 main span
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

G64 Stone ST over South River Branch is a prestressed concrete stringer/multi-beam or girder carrying G64 Stone ST over South River Branch in Warren County, Iowa. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, projected to reach 50 by 2043. The structure is 113 ft (34.4 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesG64 Stone ST
CrossesSouth River Branch
Location074251401
RouteCounty Highway 0
CountyWarren County
StateIowa
Coordinates41.22058, -93.71152
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length113 ft (34.4 m)
Longest span110 ft (33.5 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 G64 Stone ST over South River Branch built?

It was built in 2023, making it 2 years old in 2025.

What condition is G64 Stone ST over South River Branch 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 2023.

How much traffic does G64 Stone ST over South River Branch carry?

About 50 vehicles per day (2022 count).

How long is G64 Stone ST over South River Branch?

The structure is 113 ft (34.4 m) long with a longest span of 110 ft (33.5 m) and a deck 33 ft wide.

Who owns G64 Stone ST over South River Branch?

It is owned by the County Highway Agency.