US Bridges

Ia 187 over So Fk Maquoketa River

Good

Buchanan County, Iowa · 0.1 Mi. S of S JCT SR C57 · Structure no. 000000000016051

Built
1989
36 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
172 ft
3 main spans
Daily traffic
2,250
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 187 over So Fk Maquoketa River is a prestressed concrete stringer/multi-beam or girder carrying Ia 187 over So Fk Maquoketa River in Buchanan 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,250 vehicles a day, roughly 14% of them trucks, projected to reach 2,250 by 2044. The structure is 172 ft (52.4 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIa 187
CrossesSo Fk Maquoketa River
Location0.1 Mi. S of S JCT SR C57
RouteState Highway 187
CountyBuchanan County
StateIowa
Coordinates42.61337, -91.64686
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99.8 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length172 ft (52.4 m)
Longest span82 ft (25 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,250 (2022)
Projected traffic2,250 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Ia 187 over So Fk Maquoketa River built?

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

What condition is Ia 187 over So Fk Maquoketa River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does Ia 187 over So Fk Maquoketa River carry?

About 2,250 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Ia 187 over So Fk Maquoketa River?

The structure is 172 ft (52.4 m) long with a longest span of 82 ft (25 m) and a deck 39 ft wide.

Who owns Ia 187 over So Fk Maquoketa River?

It is owned by the State Highway Agency.