US Bridges

Farr. HWY over Makakilo Gulch

Fair

Honolulu County, Hawaii · TMK:9-1-16 Bryan 104F2 · Structure no. 003904001100001

Built
1995
30 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
35 ft
2 main spans
Daily traffic
7,247
1987 count
Owner
County
County Highway Agency

About this bridge

Farr. HWY over Makakilo Gulch is a concrete culvert carrying Farr. HWY over Makakilo Gulch in Honolulu County, Hawaii. It was built in 1995, so it is 30 years old, younger than the Hawaii average of 63.8 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 7,247 vehicles a day, projected to reach 9,059 by 2025. The structure is 35 ft (10.7 m) long and 88 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesFarr. HWY
CrossesMakakilo Gulch
LocationTMK:9-1-16 Bryan 104F2
RouteCity Street 0
CountyHonolulu County
StateHawaii
Coordinates21.34179, -158.07305
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span17 ft (5.2 m)
Deck width88 ft (26.8 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,247 (1987)
Projected traffic9,059 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$223,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Farr. HWY over Makakilo Gulch built?

It was built in 1995, making it 30 years old in 2025.

What condition is Farr. HWY over Makakilo Gulch 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 September 2023.

How much traffic does Farr. HWY over Makakilo Gulch carry?

About 7,247 vehicles per day (1987 count).

How long is Farr. HWY over Makakilo Gulch?

The structure is 35 ft (10.7 m) long with a longest span of 17 ft (5.2 m) and a deck 88 ft wide.

Who owns Farr. HWY over Makakilo Gulch?

It is owned by the County Highway Agency.