US Bridges

Csah 7 over Split Rock Creek

FairPosted for load

Rock County, Minnesota · 2.1 MI W of JCT TH 23 · Structure no. 67506

Built
1973
52 years old
Condition
Fair
inspected October 2024
Type
Slab
Wood or Timber
Length
182 ft
7 main spans
Daily traffic
105
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 7 over Split Rock Creek is a wood or timber slab carrying Csah 7 over Split Rock Creek in Rock County, Minnesota. It was built in 1973, so it is 52 years old, older than the Minnesota average of 38.5 years.

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

It carries about 105 vehicles a day, projected to reach 105 by 2042. The structure is 182 ft (55.5 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCsah 7
CrossesSplit Rock Creek
Location2.1 MI W of JCT TH 23
RouteCounty Highway 7
CountyRock County
StateMinnesota
Coordinates43.76225, -96.44638
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating25.6 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans7
Design loadHS 20
Structure length182 ft (55.5 m)
Longest span26 ft (7.9 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic105 (2022)
Projected traffic105 by 2042
Trucks—
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 Csah 7 over Split Rock Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Csah 7 over Split Rock 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 October 2024.

How much traffic does Csah 7 over Split Rock Creek carry?

About 105 vehicles per day (2022 count).

How long is Csah 7 over Split Rock Creek?

The structure is 182 ft (55.5 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.

Who owns Csah 7 over Split Rock Creek?

It is owned by the County Highway Agency.