US Bridges

NB US 61 over Dme RR

Fair

Scott County, Iowa · 0.8 Mi. N of JCT I-80 · Structure no. 000000000604640

Built
1981
44 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
344 ft
3 main spans
Daily traffic
18,650
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 61 over Dme RR is a steel continuous stringer/multi-beam or girder carrying NB US 61 over Dme RR in Scott County, Iowa. It was built in 1981, so it is 44 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 18,650 vehicles a day, roughly 11% of them trucks, projected to reach 18,650 by 2044. The structure is 344 ft (104.9 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB US 61
CrossesDme RR
Location0.8 Mi. N of JCT I-80
RouteU.S. Route 61
CountyScott County
StateIowa
Coordinates41.60613, -90.56529
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length344 ft (104.9 m)
Longest span131 ft (39.9 m)
Deck width62 ft (18.9 m)
Roadway width59 ft (18.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,650 (2022)
Projected traffic18,650 by 2044
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NB US 61 over Dme RR built?

It was built in 1981, making it 44 years old in 2025.

What condition is NB US 61 over Dme RR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does NB US 61 over Dme RR carry?

About 18,650 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is NB US 61 over Dme RR?

The structure is 344 ft (104.9 m) long with a longest span of 131 ft (39.9 m) and a deck 62 ft wide.

Who owns NB US 61 over Dme RR?

It is owned by the State Highway Agency.