SH 157 ML NBND
Carrying SH 157 ML NBND over SOUTH BOULDER ROAD
0.08 MI N OF JCT US 36, Boulder, Colorado
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: SH 157 ML NBND
The SH 157 ML NBND bridge in Boulder, Colorado carries SH 157 ML NBND over SOUTH BOULDER ROAD. It was built in 1973, making it 53 years old today. The structure is built primarily of steel continuous and spans 2 sections, stretching 56.3 meters (185 feet) end to end. Daily traffic averages 19,000 vehicles, placing it in the heavily-trafficked tier of Colorado bridges. It is owned and maintained by State Highway Agency.
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. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 30.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How SH 157 ML NBND compares
Live comparison across Colorado.
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 How the historical reference is calculated.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
- 1973
- Material
- Steel Continuous
- Number of Spans
- 2
- Structure Length
- 56.3 m (185 ft)
- Deck Width
- 16.0 m (52 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 19,000 vehicles/day
- Structure Number
- E-16-HX
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • The substructure (piers and abutments) rates fair at 6/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether SH 157 ML NBND 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 SH 157 ML NBND against other structures in Boulder and across Colorado. Colorado 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 SH 157 ML NBND?
SH 157 ML NBND in Boulder, Colorado 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 SH 157 ML NBND inspected?
SH 157 ML NBND'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 19,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SH 157 ML NBND 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 SH 157 ML NBND?
SH 157 ML NBND has an NBI inventory load rating of 30.2 metric tons.
Who is responsible for maintaining SH 157 ML NBND?
SH 157 ML NBND is owned and maintained by State Highway Agency.
How old is SH 157 ML NBND and does age affect safety?
SH 157 ML NBND was built in 1973, making it 53 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.