US Bridges

CR 56 over Bunker Hill Creek

Poor

Benton County, Minnesota · 0.1 MI N of JCT CR 40 · Structure no. 92792

Built
1971
54 years old
Condition
Poor
inspected October 2024
Type
Slab
Wood or Timber
Length
54 ft
3 main spans
Daily traffic
350
2011 count
Owner
County
County Highway Agency

About this bridge

CR 56 over Bunker Hill Creek is a wood or timber slab carrying CR 56 over Bunker Hill Creek in Benton County, Minnesota. It was built in 1971, so it is 54 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 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.

It carries about 350 vehicles a day, projected to reach 350 by 2039. The structure is 54 ft (16.6 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCR 56
CrossesBunker Hill Creek
Location0.1 MI N of JCT CR 40
RouteCounty Highway 56
CountyBenton County
StateMinnesota
Coordinates45.80247, -94.17593
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating34.2 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length54 ft (16.6 m)
Longest span18 ft (5.5 m)
Deck width30 ft (9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2011)
Projected traffic350 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 CR 56 over Bunker Hill Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is CR 56 over Bunker Hill Creek 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 October 2024.

How much traffic does CR 56 over Bunker Hill Creek carry?

About 350 vehicles per day (2011 count).

How long is CR 56 over Bunker Hill Creek?

The structure is 54 ft (16.6 m) long with a longest span of 18 ft (5.5 m) and a deck 30 ft wide.

Who owns CR 56 over Bunker Hill Creek?

It is owned by the County Highway Agency.