US Bridges

SR 177 over Mineral Creek

Fair

Pinal County, Arizona · 16.0 MI NW JCT SR 77 · Structure no. 00616

Built
1962
63 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
209 ft
3 main spans
Daily traffic
1,810
2024 count
Owner
State
State Highway Agency

About this bridge

SR 177 over Mineral Creek is a steel continuous stringer/multi-beam or girder carrying SR 177 over Mineral Creek in Pinal County, Arizona. It was built in 1962, so it is 63 years old, older than the Arizona average of 47.8 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 1,810 vehicles a day, roughly 18% of them trucks, projected to reach 1,820 by 2042. The structure is 209 ft (63.7 m) long and 35 ft wide. If it were closed, the detour would be 28 mi (45 km).

Location

Open in Google Maps
CarriesSR 177
CrossesMineral Creek
Location16.0 MI NW JCT SR 77
RouteState Highway 177
CountyPinal County
StateArizona
Coordinates33.12253, -110.97653
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length209 ft (63.7 m)
Longest span78 ft (23.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,810 (2024)
Projected traffic1,820 by 2042
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 177 over Mineral Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is SR 177 over Mineral 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 SR 177 over Mineral Creek carry?

About 1,810 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is SR 177 over Mineral Creek?

The structure is 209 ft (63.7 m) long with a longest span of 78 ft (23.8 m) and a deck 35 ft wide.

Who owns SR 177 over Mineral Creek?

It is owned by the State Highway Agency.