US Bridges

318th Ave over S Fork English River

Good

Keokuk County, Iowa · 077101504 · Structure no. 000000000212781

Built
2014
11 years old
Condition
Good
inspected March 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
246 ft
3 main spans
Daily traffic
80
2022 count
Owner
County
County Highway Agency

About this bridge

318th Ave over S Fork English River is a prestressed concrete stringer/multi-beam or girder carrying 318th Ave over S Fork English River in Keokuk County, Iowa. It was built in 2014, so it is 11 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 80 vehicles a day, projected to reach 80 by 2043. The structure is 246 ft (75 m) long and 27 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
Carries318th Ave
CrossesS Fork English River
Location077101504
RouteCounty Highway 0
CountyKeokuk County
StateIowa
Coordinates41.47824, -91.98939
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 inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal 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 length246 ft (75 m)
Longest span82 ft (25 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)
Projected traffic80 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 318th Ave over S Fork English River built?

It was built in 2014, making it 11 years old in 2025.

What condition is 318th Ave over S Fork English 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 March 2021.

How much traffic does 318th Ave over S Fork English River carry?

About 80 vehicles per day (2022 count).

How long is 318th Ave over S Fork English River?

The structure is 246 ft (75 m) long with a longest span of 82 ft (25 m) and a deck 27 ft wide.

Who owns 318th Ave over S Fork English River?

It is owned by the County Highway Agency.