US Bridges

Grannis Rd. over Grannis CR

PoorPosted for load

Fayette County, Iowa · 093083605 · Structure no. 000000000151080

Built
1951
74 years old, rebuilt 2019
Condition
Poor
inspected November 2023
Type
Truss - Thru
Steel
Length
68 ft
1 main span
Daily traffic
29
2022 count
Owner
County
County Highway Agency

About this bridge

Grannis Rd. over Grannis CR is a steel truss - thru carrying Grannis Rd. over Grannis CR in Fayette County, Iowa. It was built in 1951 and reconstructed in 2019, so it is 74 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 29 vehicles a day, projected to reach 29 by 2043. The structure is 68 ft (20.7 m) long and 16 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesGrannis Rd.
CrossesGrannis CR
Location093083605
RouteCounty Highway 0
CountyFayette County
StateIowa
Coordinates42.82536, -91.72729
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating10 US tons
Inventory rating10 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length68 ft (20.7 m)
Longest span65 ft (19.8 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29 (2022)
Projected traffic29 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Grannis Rd. over Grannis CR built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 2019.

What condition is Grannis Rd. over Grannis CR 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 November 2023.

How much traffic does Grannis Rd. over Grannis CR carry?

About 29 vehicles per day (2022 count).

How long is Grannis Rd. over Grannis CR?

The structure is 68 ft (20.7 m) long with a longest span of 65 ft (19.8 m) and a deck 16 ft wide.

Who owns Grannis Rd. over Grannis CR?

It is owned by the County Highway Agency.