US Bridges

Poplar Grove Ave over US 20

Good

Hamilton County, Iowa · 2.0 Miles W of JCT US 69 · Structure no. 000000000603370

Built
1975
50 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
268 ft
4 main spans
Daily traffic
26
2022 count
Owner
State
State Highway Agency

About this bridge

Poplar Grove Ave over US 20 is a prestressed concrete stringer/multi-beam or girder carrying Poplar Grove Ave over US 20 in Hamilton County, Iowa. It was built in 1975, so it is 50 years old, older 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 26 vehicles a day, roughly 4% of them trucks, projected to reach 26 by 2044. The structure is 268 ft (81.7 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesPoplar Grove Ave
CrossesUS 20
Location2.0 Miles W of JCT US 69
RouteCounty Highway 0
CountyHamilton County
StateIowa
Coordinates42.44833, -93.67957
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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating82 US tons
Inventory rating29.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length268 ft (81.7 m)
Longest span92 ft (28 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Poplar Grove Ave over US 20 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Poplar Grove Ave over US 20 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 April 2024.

How much traffic does Poplar Grove Ave over US 20 carry?

About 26 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Poplar Grove Ave over US 20?

The structure is 268 ft (81.7 m) long with a longest span of 92 ft (28 m) and a deck 33 ft wide.

Who owns Poplar Grove Ave over US 20?

It is owned by the State Highway Agency.