Inlet Canal Road
Carrying Inlet Canal Road over Crow Creek Wasteway
1.7 mi NE Belle Fourche, Butte, South Dakota
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: Inlet Canal Road
The Inlet Canal Road bridge in Butte, South Dakota carries Inlet Canal Road over Crow Creek Wasteway. It was built in 1907, making it 119 years old today. It was last reconstructed in 1996, extending its service life. The structure is built primarily of prestressed concrete and spans 1 section, stretching 21.8 meters (72 feet) end to end. Daily traffic averages 1 vehicles, placing it in the lower-traffic tier of South Dakota bridges. It is owned and maintained by Bureau of Reclamation.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 6/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 39.9 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How Inlet Canal Road compares
Live comparison across South Dakota.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1907
- Last Reconstructed
- 1996
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 21.8 m (72 ft)
- Deck Width
- 5.5 m (18 ft)
- Owner
- Bureau of Reclamation
- Avg Daily Traffic
- 1 vehicles/day
- Structure Number
- 10-112-356
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
How to read this record
This page shows what the last federal inspection recorded, not whether Inlet Canal Road is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare Inlet Canal Road against other structures in Butte and across South Dakota. South Dakota bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for Inlet Canal Road?
Inlet Canal Road in Butte, South Dakota has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is Inlet Canal Road inspected?
Inlet Canal Road's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 1 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Inlet Canal Road is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for Inlet Canal Road?
Inlet Canal Road has an NBI inventory load rating of 39.9 metric tons.
Who is responsible for maintaining Inlet Canal Road?
Inlet Canal Road is owned and maintained by Bureau of Reclamation.
How old is Inlet Canal Road and does age affect safety?
Inlet Canal Road was built in 1907, making it 119 years old and last reconstructed in 1996.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.