US Bridges

Lincoln RD over Trib to Black Hawk Creek

Poor

Black Hawk County, Iowa · 87-14-03-02-10 · Structure no. 000000000074530

Built
1900
125 years old, rebuilt 1969
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
25 ft
2 main spans
Daily traffic
177
2022 count
Owner
County
County Highway Agency

About this bridge

Lincoln RD over Trib to Black Hawk Creek is a steel continuous stringer/multi-beam or girder carrying Lincoln RD over Trib to Black Hawk Creek in Black Hawk County, Iowa. It was built in 1900 and reconstructed in 1969, so it is 125 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: open, would be posted or closed except for temporary shoring.

It carries about 177 vehicles a day, projected to reach 177 by 2043. The structure is 25 ft (7.6 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLincoln RD
CrossesTrib to Black Hawk Creek
Location87-14-03-02-10
RouteCounty Highway 0
StateIowa
Coordinates42.38169, -92.47551
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating53.4 US tons
Inventory rating29 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span13 ft (4 m)
Deck width26 ft (8 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic177 (2022)
Projected traffic177 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Lincoln RD over Trib to Black Hawk Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1969.

What condition is Lincoln RD over Trib to Black Hawk 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 December 2023.

How much traffic does Lincoln RD over Trib to Black Hawk Creek carry?

About 177 vehicles per day (2022 count).

How long is Lincoln RD over Trib to Black Hawk Creek?

The structure is 25 ft (7.6 m) long with a longest span of 13 ft (4 m) and a deck 26 ft wide.

Who owns Lincoln RD over Trib to Black Hawk Creek?

It is owned by the County Highway Agency.