US Bridges

Loc 490th ST over W Br Blue Earth River

PoorPosted for load

Kossuth County, Iowa · 100282101 · Structure no. 000000000217491

Built
1980
45 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
62 ft
3 main spans
Daily traffic
5
2021 count
Owner
County
County Highway Agency

About this bridge

Loc 490th ST over W Br Blue Earth River is a wood or timber stringer/multi-beam or girder carrying Loc 490th ST over W Br Blue Earth River in Kossuth County, Iowa. It was built in 1980, so it is 45 years old, younger 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 5 vehicles a day, projected to reach 5 by 2043. The structure is 62 ft (19 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLoc 490th ST
CrossesW Br Blue Earth River
Location100282101
RouteCounty Highway 0
StateIowa
Coordinates43.47364, -94.16397
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22.8 US tons
Inventory rating18.4 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length62 ft (19 m)
Longest span23 ft (7 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2021)
Projected traffic5 by 2043
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Loc 490th ST over W Br Blue Earth River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Loc 490th ST over W Br Blue Earth 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 May 2023.

How much traffic does Loc 490th ST over W Br Blue Earth River carry?

About 5 vehicles per day (2021 count).

How long is Loc 490th ST over W Br Blue Earth River?

The structure is 62 ft (19 m) long with a longest span of 23 ft (7 m) and a deck 24 ft wide.

Who owns Loc 490th ST over W Br Blue Earth River?

It is owned by the County Highway Agency.