The Industrial and Commercial (IC) team was put together as part of the State of Hawaii Department of Transportation (State), Highways Division’s Storm Water Management Program Plan in compliance with the State Highways Division’s National Pollutant Discharge Elimination System (NPDES) Permit No. HI S000001. Our IC team schedules storm water inspections to meet with facilities […]
Construction BMPs Project Highlight: Slope Improvements Phase 8
The State of Hawaii Department of Transportation, Highways Division, Oahu District (DOT-HWYS) has numerous roadway construction projects that vary in size and complexity. All construction projects, regardless of size or area of land disturbance, must implement best management practices (BMPs) to control sediment and prevent erosion. For this quarter, we want to highlight the Slope […]
Storm Water Best Management Practice Improvements at Windward Baseyard
The State of Hawaii Department of Transportation, Highways Division’s (DOT-HWYS) is engaged in ongoing efforts to reduce pollution from storm water runoff through the implementation of the Action Plan for Retrofitting Structural BMPs and the Trash Reduction Plan. Both plans prescribe storm water Best Management Practice (BMP) improvements of DOT-HWYS Municipal Separate Storm Sewer System […]
Storm Water Best Management Practice Improvements at Maintenance Baseyards on Oahu
The Storm Water Best Management Practice (BMP) Improvements at Maintenance Baseyards on Oahu project is part of the State of Hawaii Department of Transportation, Highways Division’s (DOT-HWYS) ongoing efforts to reduce pollution from storm water runoff. DOT-HWYS operates five maintenance baseyards on the island of Oahu. Storm water from these baseyards and other paved areas […]
Trash Reduction Plan
Did you know that approximately 8 million metric tons of plastic and other debris ends up in the world’s oceans every year? In addition to being unsightly while enjoying a day at the beach, these plastics and other debris threaten entire ecosystems and the food supply of both wild animals and humans. The State of […]
Storm Water Treatment BMPs and Maintenance
Over the past several years the State of Hawaii Department of Transportation, Highways Division (DOT-HWYS) has continued to design and construct permanent storm water treatment best management practices (PBMPs) as part of their Post-Construction Storm Water Management Program, Action Plan for Retrofitting Structural BMPs, and Trash Reduction Plan. As of the summer of 2018 there […]
High-Performance Mulch Application
As part of the Permanent Erosion Control Program, DOT-HWYS continues to repair areas of erosion along state highways. For this site along Kalanianaole Highway in Kailua, traditional landscaping methods could not be used due to its steep, unstable, and irregular terrain. In order to allow the existing trees, and their root systems to remain undisturbed […]
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 […]
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 […]
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 […]