US Bridges

Mamalahoa HWY over Intermittent Strm

FairPosted for load

Hawaii County, Hawaii · Tmk: 7-7-007:073 · Structure no. 001001800700263

Built
1969
56 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
42 ft
1 main span
Daily traffic
1,322
1984 count
Owner
County
County Highway Agency

About this bridge

Mamalahoa HWY over Intermittent Strm is a concrete stringer/multi-beam or girder carrying Mamalahoa HWY over Intermittent Strm in Hawaii County, Hawaii. It was built in 1969, so it is 56 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. Its operating status is: posted for load restriction.

It carries about 1,322 vehicles a day, projected to reach 1,653 by 2025. The structure is 42 ft (12.8 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesMamalahoa HWY
CrossesIntermittent Strm
LocationTmk: 7-7-007:073
RouteCounty Highway 180
CountyHawaii County
StateHawaii
Coordinates19.60258, -155.94896
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating20 US tons
Inventory rating9.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width30 ft (9.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,322 (1984)
Projected traffic1,653 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRelief for waterway
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$236,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mamalahoa HWY over Intermittent Strm built?

It was built in 1969, making it 56 years old in 2025.

What condition is Mamalahoa HWY over Intermittent Strm 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 March 2024.

How much traffic does Mamalahoa HWY over Intermittent Strm carry?

About 1,322 vehicles per day (1984 count).

How long is Mamalahoa HWY over Intermittent Strm?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.

Who owns Mamalahoa HWY over Intermittent Strm?

It is owned by the County Highway Agency.