US Bridges

NW 70th RD over Drywood CR

PoorClosed to traffic

Barton County, Missouri · S 15 T 33 N R 33 W · Structure no. 15939

Built
1900
125 years old
Condition
Poor
inspected January 2016
Type
Truss - Thru
Steel
Length
75 ft
2 main spans
Daily traffic
5
2023 count
Owner
County
County Highway Agency

About this bridge

NW 70th RD over Drywood CR is a steel truss - thru carrying NW 70th RD over Drywood CR in Barton County, Missouri. It was built in 1900, so it is 125 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 2 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: closed to all traffic.

It carries about 5 vehicles a day, roughly 10% of them trucks, projected to reach 7 by 2043. The structure is 75 ft (22.9 m) long and 11 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesNW 70th RD
CrossesDrywood CR
LocationS 15 T 33 N R 33 W
RouteCounty Highway 104
CountyBarton County
StateMissouri
Coordinates37.60874, -94.53219
Functional classRural Local

Condition and inspection

Poor

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.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2016
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length75 ft (22.9 m)
Longest span37 ft (11.3 m)
Deck width11 ft (3.5 m)
Roadway width11 ft (3.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2023)
Projected traffic7 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$566,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 70th RD over Drywood CR built?

It was built in 1900, making it 125 years old in 2025.

What condition is NW 70th RD over Drywood CR 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 January 2016.

How much traffic does NW 70th RD over Drywood CR carry?

About 5 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NW 70th RD over Drywood CR?

The structure is 75 ft (22.9 m) long with a longest span of 37 ft (11.3 m) and a deck 11 ft wide.

Who owns NW 70th RD over Drywood CR?

It is owned by the County Highway Agency.