BMP Tip: Run-on Diversions
How can you best manage storm water run-on at your construction site? Run-on is storm water runoff from another property that is entering a site. Run-on diversions are devices to intercept, divert, and convey off-site surface runoff around or away from the project site to prevent site erosion.
2018 Protect Our Water Conference
The State of Hawaii Department of Transportation (HDOT) hosted its 2018 Protect Our Water Conference on Wednesday, November 14, 2018, at Pōmaikaʻi Ballrooms. At the conference, approximately 400 attendees comprised of HDOT employees, contractors, subcontractors, consultants, other MS4 permittees, vendors, and state and federal agencies discussed best management practices concerning construction…
Trash Reduction Plan
The State of Hawaii Department of Transportation, Highways Division (DOT-HWYS) is doing their part to eliminate trash from state owned roadways and their Municipal Separate Storm Sewer System (MS4) through the implementation of a Trash Reduction Plan (TRP). The TRP was developed in 2016 and included a detailed study to determine DOT-HWYS baseline trash load. The goal of the TRP is to reduce the…
BMP Tip: Storm Water Pollution Prevention Plans
What is a Storm Water Pollution Prevention Plan (SWPPP)? A SWPPP is a site-specific, written document that among other things. Here are some things to consider and address when developing a SWPPP.
Storm Water Treatment BMPs and Maintenance
As of the summer of 2018 there are over 100 PBMPs actively treating storm water runoff throughout DOT-HWYS Municipal Separate Storm Sewer System (MS4); and there are many more in the planning and design phases.
2018 Annual Maintenance Baseyard Storm Water Training Champions
Congratulations to the Honolulu Crew for winning the Annual Maintenance Baseyard Storm Water Training Quiz Competition. The training and quiz event took place in July, with heavy competition between the 13 maintenance crews. The Honolulu Crew had the highest average score on the post-training quiz (average of 19.45 points out of 20 possible).
Construction BMP Tip: Types of Erosion
While natural erosion occurs at slow rates, erosion can be accelerated as a result of ground disturbing activities on construction sites causing sedimentation. It is important to understand the types of erosion that may occur and practices that can be implemented on construction sites to minimize erosion.
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 on the slope, the application of a spray-on…
Eroded Slope Repair
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 and H-2 freeways and Kamehameha and Kalanianaole Highways, and were managed by DOT-HWYS’ Salt Lake and Lower Halawa field offices.
Construction BMP Tip: Material Storage
During construction, storing various types of material is needed and proper handling is required to prevent and reduce storm water pollution. Establishing practices and procedures for handling and storing construction materials through the life of a project can minimize the potential for pollutants coming into contact with storm water.