DOT projects

Eroded Slope Repair

The State of Hawaii Department of Transportation, Highways Division, Oahu District (DOT-HWYS) continued repairing areas of erosion along its roadways during 2017. As part of the Permanent Erosion Control Program, DOT-HWYS completed permanent repairs at thirteen sites in 2017, in addition to fourteen sites completed in 2016. These erosion repair projects occurred along the H-1 […]

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Downspout Filters

Have you ever wondered where storm water runoff from elevated highways and bridges goes? These structures typically have drain inlets that are connected to pipes that convey the storm water, along with trash and other pollutants, to the ground, or storm system below. As part of the Action Plan for Retrofitting Structural BMPs DOT-HWYS recently […]

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Eroded Outfall Repairs

Storm water from roadways typically drains through a network of pipes (the Municipal Separate Storm Sewer System, or “MS4”) to outfall locations into stream channels, or directly to the ocean. Over time, the pipes and outfall structures at many of these locations have degraded, resulting in soil erosion and negative water quality impacts. As part […]

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Central Oahu Best Management Practices, Eroded Slope Repairs, Phase 2

The State of Hawaii Department of Transportation, Highways Division, Oahu District (DOT-HWYS) is actively implementing their Permanent Erosion Control Program by repairing eroded slopes along, and under, their Highways. Some of these eroded sites occur at underpasses where establishing vegetation is extremely difficult due to constant shading from the freeway, steep slopes, and poor soil […]

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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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