IS 70
Carrying IS 70 over SEMPLE RUN
0.25 MILE WEST OF IS 81, Washington, Maryland
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IS 70 in Washington, Maryland sits above 62% of rated Maryland bridges on inventory load rating (51 t), while its 1966 build year is earlier than 37% of Washington's recorded-year cohort (300 bridges).
IS 70 in Washington, Maryland is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1966, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure MD:100000210111020
INTERSTATE-ERA · CONCRETE · MID-BRIDGE · CULVERT-LED · HEAVY-ADT · HEAVY-LOAD · CAT-GOOD
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MID-BRIDGE 62.2 m
- CULVERT-LED Culvert-led
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy load
- CAT-GOOD Good
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: IS 70
The IS 70 bridge in Washington, Maryland carries IS 70 over SEMPLE RUN. It was built in 1966, making it 60 years old today. The structure is built primarily of concrete, stretching 62.2 meters (204 feet) end to end. Daily traffic averages 45,040 vehicles, placing it in the heavily-trafficked tier of Maryland bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How IS 70 compares
Age against the county: built in 1966, earlier than 111 of Washington's 300 bridges with a recorded construction year (37%), against a county median build year of 1965. This is one of the newer structures in its county.
Live comparison across Maryland bridges with a recorded inventory load rating (5,479 of 5,484 rated).
IS 70 vs every rated Maryland bridge
Inventory load rating (metric tons), FHWA NBI, this state
51 Top 38% higher than 62% of 5,479 bridges
rated Maryland bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Washington inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 300 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1966
- Material
- Concrete
- Structure Length
- 62.2 m (204 ft) 0
- Owner
- State Highway Agency
- Avg Daily Traffic
- 45,040 vehicles/day
- Structure Number
- 100000210111020
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether IS 70 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 IS 70 against other structures in Washington and across Maryland. Maryland 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 IS 70?
IS 70 in Washington, Maryland on the FHWA's 0–9 scale.
How often is IS 70 inspected?
IS 70'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 45,040 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IS 70 is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for IS 70?
IS 70 has an NBI inventory load rating of 50.8 metric tons.
Who is responsible for maintaining IS 70?
IS 70 is owned and maintained by State Highway Agency.
How old is IS 70 and does age affect safety?
IS 70 was built in 1966, making it 60 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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.