US Bridges

Atlas RD over Shell Rock River

PoorPosted for load

Bremer County, Iowa · 091141806 · Structure no. 000000000079090

Built
1959
66 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
421 ft
4 main spans
Daily traffic
226
2022 count
Owner
County
County Highway Agency

About this bridge

Atlas RD over Shell Rock River is a steel continuous stringer/multi-beam or girder carrying Atlas RD over Shell Rock River in Bremer County, Iowa. It was built in 1959, so it is 66 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 226 vehicles a day, projected to reach 226 by 2044. The structure is 421 ft (128.3 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesAtlas RD
CrossesShell Rock River
Location091141806
RouteCounty Highway 0
StateIowa
Coordinates42.68875, -92.5393
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30.5 US tons
Inventory rating17.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length421 ft (128.3 m)
Longest span117 ft (35.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic226 (2022)
Projected traffic226 by 2044
Trucks0%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Atlas RD over Shell Rock River built?

It was built in 1959, making it 66 years old in 2025.

What condition is Atlas RD over Shell Rock River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Atlas RD over Shell Rock River carry?

About 226 vehicles per day (2022 count).

How long is Atlas RD over Shell Rock River?

The structure is 421 ft (128.3 m) long with a longest span of 117 ft (35.7 m) and a deck 26 ft wide.

Who owns Atlas RD over Shell Rock River?

It is owned by the County Highway Agency.