US Bridges

Cedar Ridge Rd. over Blue Creek

Poor

Linn County, Iowa · 085080703 · Structure no. 000000000222521

Built
1989
36 years old
Condition
Poor
inspected September 2024
Type
Culvert
Steel
Length
36 ft
5 main spans
Daily traffic
147
2022 count
Owner
County
County Highway Agency

About this bridge

Cedar Ridge Rd. over Blue Creek is a steel culvert carrying Cedar Ridge Rd. over Blue Creek in Linn County, Iowa. It was built in 1989, so it is 36 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.

It carries about 147 vehicles a day, projected to reach 147 by 2044. The structure is 36 ft (10.9 m) long.

Location

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CarriesCedar Ridge Rd.
CrossesBlue Creek
Location085080703
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates42.18684, -91.82486
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating48 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans5
Design loadHS 20
Structure length36 ft (10.9 m)
Longest span5 ft (1.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic147 (2022)
Projected traffic147 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Cedar Ridge Rd. over Blue Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Cedar Ridge Rd. over Blue Creek 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 September 2024.

How much traffic does Cedar Ridge Rd. over Blue Creek carry?

About 147 vehicles per day (2022 count).

How long is Cedar Ridge Rd. over Blue Creek?

The structure is 36 ft (10.9 m) long with a longest span of 5 ft (1.5 m).

Who owns Cedar Ridge Rd. over Blue Creek?

It is owned by the County Highway Agency.