DOT projects

Kaneohe Watershed Storm Water Best Management Practices on Oahu

The Kaneohe Watershed Storm Water Best Management Practices (BMP) on Oahu project is part of the HDOT Highways, Oahu District’s ongoing effort to reduce pollution from storm water runoff. Storm water from roadways typically drains through a network of pipes (the Municipal Separate Storm Sewer System, or “MS4”) directly to outfall locations into stream channels, […]

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Eroded Slope Repairs

The State of Hawaii Department of Transportation, Highways Division, Oahu District (DOT-HWYS) has been very busy over the last year repairing eroded slopes along its highways as part of the Permanent Erosion Control Program. Since the start of 2016 permanent erosion repair projects have been completed at 14 sites, island wide. If you drive on […]

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Highways Debris Cleaning Assessment

The State of Hawaii Department of Transportation, Highways Division, Oahu District (DOT-HWYS) is nearing the completion of its two-year data collection period for its Debris Cleaning Assessment. In October 2014, DOT-HWYS embarked on a study aimed to better understand how effective street sweeping is in reducing pollution from our highways. Street sweeping has been identified […]

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Kawainui Watershed Storm Water BMP project

Construction of the HDOT Highways Kawainui Watershed Storm Water Best Management Practices project was completed in the spring of 2016. The overall goal of this project is to reduce sediment erosion into the HDOT Highways storm water system. This project included the repair and remediation of five eroded slopes located within HDOT Highways rights-of-way that […]

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Ala Wai Watershed Storm Water Best Management Practices on Oahu Project

In order to keep roadways safe for driving, they are designed and constructed to allow storm water runoff to drain quickly and efficiently to the road shoulder. Storm water runoff from the State of Hawaii Department of Transportation, Highways Division’s (DOT-HWYS) roadways typically drains through a network of pipes (the Municipal Separate Storm Sewer System, […]

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Liliha St. BMPs

Liliha Street Rehabilitation Project

The State of Hawaii, Department of Transportation, Highways Division, Oahu District has numerous roadway construction projects going on at any given time that vary in size and complexity. However, one thing that remains the same for all construction projects regardless of the size of the project or area of land disturbance, is the need to […]

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Erosion Control 2

Fun With Construction BMP Terms: Erosion Control vs. Sediment Control!

Erosion and sediment control (E&SC) is a term that most of us in the construction industry are familiar with in regards to storm water runoff issues at a project’s site. But have you ever really thought about what it actually means? If you break it down and separate the words “erosion control” and “sediment control,” […]

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Bioswale header

Miscellaneous Permanent Best Management Practices on Oahu

The Miscellaneous Permanent Best Management Practices on Oahu project, which will help reduce pollutant contribution to the storm water system, is currently underway along Interstate H-3 near Kaneohe. The $2 million project includes the construction of a Nutrient Separating Baffling Box treatment system and will replace existing concrete drainage channels with 16 bioswales. The bioswales […]

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3. 1-Year Post Construction

Slope Improvements for Erosion Control at Various Sites on Oahu, Phase 5

State construction inspectors have given the thumbs-up of approval to a series of roadside improvements in several areas around Oahu. The completed Slope Improvements for Erosion Control Phase 5 projects included the repair of 11 eroded slopes and one eroded outfall located in the State of Hawaii Department of Transportation Highways Division’s (DOT-HWYS) rights-of-way. The […]

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Crew installing the first trash trap in the Halawa interchange

HDOT Highways kicks off multi-year trash study

The State Department of Transportation, Highways Division, Oahu District (HDOT Highways), is kicking off a multi-year study this month, one that should give its engineers and scientists more information about the man-made trash and debris found along our highways. The study, which focuses on state routes on the island of Oahu, will help HDOT Highways […]

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