US Bridges

J-20/140th ST over East Tarkio River

Good

Page County, Iowa · 070372903 · Structure no. 000000000268041

Built
2005
20 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
142 ft
3 main spans
Daily traffic
687
2022 count
Owner
County
County Highway Agency

About this bridge

J-20/140th ST over East Tarkio River is a prestressed concrete stringer/multi-beam or girder carrying J-20/140th ST over East Tarkio River in Page County, Iowa. It was built in 2005, so it is 20 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 687 vehicles a day, roughly 13% of them trucks, projected to reach 687 by 2042. The structure is 142 ft (43.3 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesJ-20/140th ST
CrossesEast Tarkio River
Location070372903
RouteCounty Highway 0
StateIowa
Coordinates40.84283, -95.1193
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.2 US tons
Inventory rating49.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span52 ft (15.9 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic687 (2022)
Projected traffic687 by 2042
Trucks13%
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 J-20/140th ST over East Tarkio River built?

It was built in 2005, making it 20 years old in 2025.

What condition is J-20/140th ST over East Tarkio 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 J-20/140th ST over East Tarkio River carry?

About 687 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is J-20/140th ST over East Tarkio River?

The structure is 142 ft (43.3 m) long with a longest span of 52 ft (15.9 m) and a deck 33 ft wide.

Who owns J-20/140th ST over East Tarkio River?

It is owned by the County Highway Agency.