US Bridges

Bancroft RD over I-69

Poor

Shiawassee County, Michigan · 3.9 MI SW of M-71 · Structure no. 000000000009749

Built
1966
59 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
232 ft
4 main spans
Daily traffic
370
1993 count
Owner
State
State Highway Agency

About this bridge

Bancroft RD over I-69 is a steel stringer/multi-beam or girder carrying Bancroft RD over I-69 in Shiawassee County, Michigan. It was built in 1966, so it is 59 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 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 370 vehicles a day, roughly 2% of them trucks, projected to reach 730 by 1977. The structure is 232 ft (70.7 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesBancroft RD
CrossesI-69
Location3.9 MI SW of M-71
RouteCounty Highway 7669
CountyShiawassee County
StateMichigan
Coordinates42.90313, -84.06925
Functional classRural Major Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 11 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length232 ft (70.7 m)
Longest span79 ft (24 m)
Deck width31 ft (9.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic370 (1993)
Projected traffic730 by 1977
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Bancroft RD over I-69 built?

It was built in 1966, making it 59 years old in 2025.

What condition is Bancroft RD over I-69 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 September 2024.

How much traffic does Bancroft RD over I-69 carry?

About 370 vehicles per day (1993 count), of which roughly 2% are trucks.

How long is Bancroft RD over I-69?

The structure is 232 ft (70.7 m) long with a longest span of 79 ft (24 m) and a deck 31 ft wide.

Who owns Bancroft RD over I-69?

It is owned by the State Highway Agency.