SR 4005 Thompson
Carrying SR 4005 Thompson over TRIB SWATARA CREEK
1 MI.E. UNION WATER WORKS, Lebanon, Pennsylvania
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
SR 4005 Thompson in Lebanon, Pennsylvania sits above 25% of rated Pennsylvania bridges on inventory load rating (32 t), while its 1938 build year is earlier than 82% of Lebanon's recorded-year cohort (228 bridges).
SR 4005 Thompson in Lebanon, Pennsylvania is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1938, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. The lowest applicable rating sets the federal condition category, so this Fair 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 PA:000000000022785
PRE-1950 · STEEL · SINGLE-SPAN · SUPER-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-FAIR
- PRE-1950 Pre-1950
- STEEL Steel
- SINGLE-SPAN Single span
- SUPER-LED Superstructure-led
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
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: SR 4005 Thompson
The SR 4005 Thompson bridge in Lebanon, Pennsylvania carries SR 4005 Thompson over TRIB SWATARA CREEK. It was built in 1938, making it 88 years old today. It was last reconstructed in 2017, extending its service life. The structure is built primarily of steel and spans 1 section, stretching 13.1 meters (43 feet) end to end. Daily traffic averages 1,216 vehicles, placing it in the moderately-trafficked tier of Pennsylvania bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 6/9, substructure at 7/9. The weakest component sits in fair condition. All reported major components score above the Poor range.
How SR 4005 Thompson compares
Age against the county: built in 1938, earlier than 186 of Lebanon's 228 bridges with a recorded construction year (82%), against a county median build year of 1969. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Pennsylvania bridges with a recorded inventory load rating (23,297 of 23,299 rated).
SR 4005 Thompson vs every rated Pennsylvania bridge
Inventory load rating (metric tons), FHWA NBI, this state
32 Top 75% higher than 25% of 23,297 bridges
rated Pennsylvania 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.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Lebanon inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 228 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
- 1938
- Last Reconstructed
- 2017
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 13.1 m (43 ft)
- Deck Width
- 9.7 m (32 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 1,216 vehicles/day
- Structure Number
- 000000000022785
Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
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 SR 4005 Thompson 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 SR 4005 Thompson against other structures in Lebanon and across Pennsylvania. Pennsylvania 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 SR 4005 Thompson?
SR 4005 Thompson in Lebanon, Pennsylvania has a deck rating of 7/9, superstructure rating of 6/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is SR 4005 Thompson inspected?
SR 4005 Thompson'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 1,216 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SR 4005 Thompson 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 SR 4005 Thompson?
SR 4005 Thompson has an NBI inventory load rating of 31.8 metric tons.
Who is responsible for maintaining SR 4005 Thompson?
SR 4005 Thompson is owned and maintained by State Highway Agency.
How old is SR 4005 Thompson and does age affect safety?
SR 4005 Thompson was built in 1938, making it 88 years old and last reconstructed in 2017.
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.