US Bridges

R77/600th Ave over Bear Creek

Good

Story County, Iowa · 085231104 · Structure no. 000000000316181

Built
2003
22 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
83 ft
1 main span
Daily traffic
948
2022 count
Owner
County
County Highway Agency

About this bridge

R77/600th Ave over Bear Creek is a prestressed concrete stringer/multi-beam or girder carrying R77/600th Ave over Bear Creek in Story County, Iowa. It was built in 2003, so it is 22 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 948 vehicles a day, roughly 8% of them trucks, projected to reach 948 by 2043. The structure is 83 ft (25.3 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesR77/600th Ave
CrossesBear Creek
Location085231104
RouteCounty Highway 0
StateIowa
Coordinates42.18195, -93.50196
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.7 US tons
Inventory rating44.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span80 ft (24.4 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic948 (2022)
Projected traffic948 by 2043
Trucks8%
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

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 R77/600th Ave over Bear Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is R77/600th Ave over Bear Creek 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 November 2022.

How much traffic does R77/600th Ave over Bear Creek carry?

About 948 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is R77/600th Ave over Bear Creek?

The structure is 83 ft (25.3 m) long with a longest span of 80 ft (24.4 m) and a deck 43 ft wide.

Who owns R77/600th Ave over Bear Creek?

It is owned by the County Highway Agency.