CO RD NW 1621 over Br S Fk Blackwater
PoorPosted for loadJohnson County, Missouri · S 19 T 46 N R 28 W · Structure no. 20918
- Built
- 1930
- 95 years old, rebuilt 1979
- Condition
- Poor
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 42 ft
- 1 main span
- Daily traffic
- 45
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
CO RD NW 1621 over Br S Fk Blackwater is a steel stringer/multi-beam or girder carrying CO RD NW 1621 over Br S Fk Blackwater in Johnson County, Missouri. It was built in 1930 and reconstructed in 1979, so it is 95 years old, older than the Missouri average of 45.1 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 45 vehicles a day, roughly 10% of them trucks, projected to reach 72 by 2043. The structure is 42 ft (12.8 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was CO RD NW 1621 over Br S Fk Blackwater built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1979.
What condition is CO RD NW 1621 over Br S Fk Blackwater in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.
How much traffic does CO RD NW 1621 over Br S Fk Blackwater carry?
About 45 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is CO RD NW 1621 over Br S Fk Blackwater?
The structure is 42 ft (12.8 m) long with a longest span of 42 ft (12.8 m) and a deck 20 ft wide.
Who owns CO RD NW 1621 over Br S Fk Blackwater?
It is owned by the County Highway Agency.