SAN MARCO BLVD.
Carrying SAN MARCO BLVD. over PIERRE ST DRAINAGE DITCH
.1S SANMARCO&S.CANYON RC, Pennington, South Dakota
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: SAN MARCO BLVD.
The SAN MARCO BLVD. bridge in Pennington, South Dakota carries SAN MARCO BLVD. over PIERRE ST DRAINAGE DITCH. It was built in 1977, making it 49 years old today. The structure is built primarily of prestressed concrete and spans 2 sections, stretching 9.8 meters (32 feet) end to end. Daily traffic averages 250 vehicles, placing it in the lower-traffic tier of South Dakota bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 3/9, superstructure at 3/9, substructure at 5/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed. Its NBI inventory load rating is 2.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How SAN MARCO BLVD. 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 How the historical reference is calculated.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
- 1977
- Material
- Prestressed Concrete
- Number of Spans
- 2
- Structure Length
- 9.8 m (32 ft)
- Deck Width
- 18.3 m (60 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 250 vehicles/day
- Structure Number
- 000000052375296
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates poor at 3/9, advanced deterioration that should be prioritized for repair.
- • At 3/9, the superstructure (beams and supports above the deck) is in poor shape, with advanced wear flagged for priority repair.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
How to read this record
SAN MARCO BLVD. is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare SAN MARCO BLVD. against other structures in Pennington 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 SAN MARCO BLVD.?
SAN MARCO BLVD. in Pennington, South Dakota has a deck rating of 3/9, superstructure rating of 3/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is SAN MARCO BLVD. inspected?
SAN MARCO BLVD.'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 250 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SAN MARCO BLVD. is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for SAN MARCO BLVD.?
SAN MARCO BLVD. has an NBI inventory load rating of 2.7 metric tons.
Who is responsible for maintaining SAN MARCO BLVD.?
SAN MARCO BLVD. is owned and maintained by City/Municipal Highway Agency.
How old is SAN MARCO BLVD. and does age affect safety?
SAN MARCO BLVD. was built in 1977, making it 49 years old.
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.