County RD 91A over Arroyo Seco

Fair

Santa Fe County, New Mexico · 0.23 M W Jct. 285 · Structure no. 000000000010125

Built: 1998; 27 years old
Condition: Fair; inspected August 2024
Type: Stringer/Multi-beam or Girder; Concrete Continuous
Length: 168 ft; 3 main spans
Daily traffic: 200; 2022 count
Owner: County; County Highway Agency

About this bridge

County RD 91A over Arroyo Seco is a concrete continuous stringer/multi-beam or girder carrying County RD 91A over Arroyo Seco in Santa Fe County, New Mexico. It was built in 1998, so it is 27 years old, younger than the New Mexico average of 51.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 200 vehicles a day, roughly 5% of them trucks, projected to reach 300 by 2040. The structure is 168 ft (51.2 m) long and 38 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

No coordinates are recorded for this structure.

CarriesCounty RD 91A

CrossesArroyo Seco

Location0.23 M W Jct. 285

RouteCounty Highway 10049

CountySanta Fe County

StateNew Mexico

Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	7 Good	Some minor problems.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionAugust 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating35.3 US tons

Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHL 93

Structure length168 ft (51.2 m)

Longest span56 ft (17.1 m)

Deck width38 ft (11.6 m)

Roadway width35 ft (10.7 m)

Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic200 (2022)

Projected traffic300 by 2040

Trucks5%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed0.6 mi (1 km)

TollOn a free road

National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency

Maintained byCounty Highway Agency

Historic statusNot eligible for the National Register of Historic Places

Work proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 91A over Arroyo Seco built?

It was built in 1998, making it 27 years old in 2025.

What condition is County RD 91A over Arroyo Seco in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does County RD 91A over Arroyo Seco carry?

About 200 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is County RD 91A over Arroyo Seco?

The structure is 168 ft (51.2 m) long with a longest span of 56 ft (17.1 m) and a deck 38 ft wide.

Who owns County RD 91A over Arroyo Seco?

It is owned by the County Highway Agency.