US Bridges

Redstone Road over Little Salt River

Fair

Midland County, Michigan · Jasper Twp Sec 29/32 · Structure no. 000000000013920

Built
1970
55 years old
Condition
Fair
inspected November 2023
Type
Culvert
Wood or Timber
Length
23 ft
3 main spans
Daily traffic
1,089
2015 count
Owner
County
County Highway Agency

About this bridge

Redstone Road over Little Salt River is a wood or timber culvert carrying Redstone Road over Little Salt River in Midland County, Michigan. It was built in 1970, so it is 55 years old, older than the Michigan average of 48.3 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 1,089 vehicles a day, projected to reach 1,618 by 2035. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRedstone Road
CrossesLittle Salt River
LocationJasper Twp Sec 29/32
RouteCounty Highway 0
CountyMidland County
StateMichigan
Coordinates43.48, -84.58528
Functional classRural Minor 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.2 US tons
Inventory rating30.9 US tons

Structure

Structure typeCulvert
MaterialWood or Timber
DeckNot applicable
Main spans3
Design loadHS 20
Structure length23 ft (6.9 m)
Longest span8 ft (2.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,089 (2015)
Projected traffic1,618 by 2035
Trucks0%
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 Redstone Road over Little Salt River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Redstone Road over Little Salt River 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 November 2023.

How much traffic does Redstone Road over Little Salt River carry?

About 1,089 vehicles per day (2015 count).

How long is Redstone Road over Little Salt River?

The structure is 23 ft (6.9 m) long with a longest span of 8 ft (2.3 m).

Who owns Redstone Road over Little Salt River?

It is owned by the County Highway Agency.