US Bridges

T47 (q Ave) over US 20

Good

Grundy County, Iowa · 3.0 Miles E of JCT Ia 14 · Structure no. 000000000607325

Built
1999
26 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
235 ft
2 main spans
Daily traffic
69
2022 count
Owner
State
State Highway Agency

About this bridge

T47 (q Ave) over US 20 is a prestressed concrete stringer/multi-beam or girder carrying T47 (q Ave) over US 20 in Grundy County, Iowa. It was built in 1999, so it is 26 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 69 vehicles a day, roughly 20% of them trucks, projected to reach 69 by 2044. The structure is 235 ft (71.6 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesT47 (q Ave)
CrossesUS 20
Location3.0 Miles E of JCT Ia 14
RouteCounty Highway 0
CountyGrundy County
StateIowa
Coordinates42.46306, -92.71049
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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.8 US tons
Inventory rating40.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length235 ft (71.6 m)
Longest span116 ft (35.4 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69 (2022)
Projected traffic69 by 2044
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 T47 (q Ave) over US 20 built?

It was built in 1999, making it 26 years old in 2025.

What condition is T47 (q 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 July 2024.

How much traffic does T47 (q Ave) over US 20 carry?

About 69 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is T47 (q Ave) over US 20?

The structure is 235 ft (71.6 m) long with a longest span of 116 ft (35.4 m) and a deck 33 ft wide.

Who owns T47 (q Ave) over US 20?

It is owned by the State Highway Agency.