US Bridges

76th Ave SW over Tissle Hollow Creek

Fair

Linn County, Iowa · Linn # 1182 · Structure no. 000000000365620

Built
2010
15 years old
Condition
Fair
inspected September 2024
Type
Slab
Wood or Timber
Length
47 ft
2 main spans
Daily traffic
137
2022 count
Owner
County
County Highway Agency

About this bridge

76th Ave SW over Tissle Hollow Creek is a wood or timber slab carrying 76th Ave SW over Tissle Hollow Creek in Linn County, Iowa. It was built in 2010, so it is 15 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 137 vehicles a day, projected to reach 137 by 2044. The structure is 47 ft (14.3 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries76th Ave SW
CrossesTissle Hollow Creek
LocationLinn # 1182
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates41.90559, -91.74382
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.3 US tons
Inventory rating63.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span24 ft (7.2 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic137 (2022)
Projected traffic137 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 76th Ave SW over Tissle Hollow Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is 76th Ave SW over Tissle Hollow Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does 76th Ave SW over Tissle Hollow Creek carry?

About 137 vehicles per day (2022 count).

How long is 76th Ave SW over Tissle Hollow Creek?

The structure is 47 ft (14.3 m) long with a longest span of 24 ft (7.2 m) and a deck 30 ft wide.

Who owns 76th Ave SW over Tissle Hollow Creek?

It is owned by the County Highway Agency.