Monmouth Cut Off over N Fk Ash Creek
Polk County, Oregon · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Monmouth Cut Off over N Fk Ash Creek in Polk County, Oregon, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1979, making it 46 years old at the 2025 inventory.
- It carries about 4,473 vehicles a day (traffic count year 2020).
- Its listed owner is a city or municipal highway agency.
- It is one of 12 of the 162 inventoried bridges in Polk County rated poor (7.4%); 12 (7.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (44.91278, -123.30591)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Prestressed concrete slab |
| Length | about 29 ft |
| Location | City of Dallas |
| NBI structure number | 53B144000000000 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Polk County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Or 22 (HWY30AZ) E over Hwy 150 Conn. & Park Rd | 1953 | 45,083 | Fair |
| Or 22 (hwy 30) over Boat Moorage Access | 1963 | 44,753 | Fair |
| Or 22 (hwy 30) over OR 221 (HWY 150) Conn | 1963 | 29,957 | Fair |
| OR 22 (Hwy 30) over Mud Slough | 1973 | 28,015 | Good |
| Or 22 (hwy 30) Con over Wallace Marine Park | 1953 | 22,964 | Fair |
| OR 22 (Hwy 30) over W&p RR | 1973 | 22,774 | Good |
All bridges nearby: Polk County, OR bridge conditions · every bridge in Polk County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.