DNR completed the updates to the Standard 1060, Storm Drain Inlet Protection for Construction Sites. The final technical standard incorporated comments from multiple stakeholders and reviewers.
The intent of the revision was to include Type D-M and Type D-HR inlet protection devices. The Type D-M and D-HR devices are variations of the existing Type D inlet device and were developed by members of the Green Tier / Clear Waters Environmental Results Program Charter (GTCWI). Type D-M and D-HR devices use different filtering fabrics than the Type D device, and allow for capture of smaller diameter soil particles. Both of the devices have recently been used successfully on several road construction projects within the City of Madison.
The published standard can be found at DNR’s website for construction standards: