Md 464 over Catoctin Creek
Frederick County, Maryland · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Md 464 over Catoctin Creek in Frederick County, Maryland, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2010, making it 15 years old at the 2025 inventory.
- It carries about 4,040 vehicles a day (traffic count year 2009).
- Its listed owner is the state highway agency.
- It is one of 196 of the 485 inventoried bridges in Frederick County rated good (40.4%); 14 (2.9%) 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 April 2023, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (39.33202, -77.57912)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 303 ft |
| Location | 3.17 Miles East of Md 17 |
| NBI structure number | 100000100091010 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maryland department of transportation.
Busiest bridges in Frederick County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 270 over MD 85 (Buckeystown Pike) | 2020 | 111,550 | Good |
| US 15 & Ramp 8 over Carroll Creek | 1958 | 95,190 | Fair |
| US 15 Nbr over US 40/W. Patrick Street | 1958 | 95,190 | Fair |
| US 15 Sbr over US 40/W. Patrick Street | 1958 | 95,190 | Fair |
| Is 70 Ebr over Md 180 | 1968 | 94,760 | Fair |
| Is 70 Wbr over Md 180 | 1968 | 94,760 | Fair |
All bridges nearby: Frederick County, MD bridge conditions · every bridge in Frederick County · Maryland bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.