Construction projects generally require ground disturbing activities and the use of various types of materials (e.g., paint, fertilizer, etc.), all of which culminates in these projects posing a higher risk to stormwater quality.
Ground that has been disturbed by construction and left unstabilized can be easily eroded by rain or runoff. As a result, stormwater runoff from construction sites can cause significant harm to our streams and coastal waters.
To mitigate the potential pollution associated with construction projects stormwater best management practices (BMPs) are employed. These practices help to reduce the risk of storm water pollution and help keep our oceans clean. Below you will find BMP related resources for contractors and project designers.
BEFORE STARTING WORK on any construction project (for HWY-M or within HWY-M
rights-of-way), ask yourself these questions below. If you answer “YES” to any of the
following
questions, you will need a permit in order to start work:
| Criteria | Permits Needed | Additional Forms | BMP Plan |
|---|---|---|---|
| 1. Am I working within HWY-M right-of-way? |
|
Required | |
| 2. Will my project discharge into an HWY-M storm drain? (even if the project does not have construction activities within HWY-M Right-of-Way) |
Required | ||
| 3. Will my project connect to an HWY-M storm drain? |
Required | ||
| 4. Does my project disturb an acre or more of land? |
(Get it on the State of Hawaii Department of Health, Clean Water Branch site) |
NOT REQUIRED |
If numbers 1, 2, or 3 in Step 1 apply to your project, YES, you will need to draft a Site-Specific Construction BMP Plan. A copy of the Site-Specific Construction BMP Plan Template is linked here.
If number 4 in Step 1 applies to your project, NO, you will NOT need to draft a Site-Specific Construction BMP Plan. However, you are required to obtain an NPDES permit and draft a Storm Water Pollution Prevention Plan (SWPPP) in lieu of a Site-Specific Construction BMP Plan. Please see the following note for HWY-M construction projects.
Note: For HWY-M construction projects that disturb an acre or more of total area and require an NPDES permit, the DOT SWPPP template must be used . A copy of the DOT SWPPP template is linked here.
BEFORE STARTING WORK on any construction project (for HWY-M or within HWY-M
rights-of-way), ask yourself these questions below. If you answer “YES” to any of the
following
questions, you will need a permit in order to start work:
| Criteria | Permits Needed | Additional Forms | BMP Plan |
|---|---|---|---|
| 1. Am I working within HWY-M right-of-way? |
|
Required | |
| 2. Will my project discharge into an HWY-M storm drain? (even if the project does not have construction activities within HWY-M Right-of-Way) |
Required | ||
| 3. Will my project connect to an HWY-M storm drain? |
Required | ||
| 4. Does my project disturb an acre or more of land? |
(Get it on the State of Hawaii Department of Health, Clean Water Branch site) |
NOT REQUIRED |
If numbers 1, 2, or 3 above apply to your project,
YES.
If number 4 applies, note:
For HWY-M construction contracts that disturb an acre or more of total area and require an
NPDES permit, the Storm Water Pollution Prevention Plan (SWPPP) template must be used in
lieu of a Site-Specific Construction BMP Plan. A copy of the SWPPP template may be obtained
through the HDOT Highways Maui District office.
The State of Hawaii, Department of Transportation, Highways Division has developed a manual in 2015 that addresses post-construction BMP requirements to provide procedures and guidelines to ensure that post-construction BMPs are considered and implemented, as applicable, throughout all phases of new development, redevelopment, and private construction projects. This manual was revised in 2022 to prioritize LID BMPs, include separate post-construction BMP criteria for MS4 and non-MS4 areas, revise evaluation process for a variance from LID BMP requirements, and include an alternative compliance process for projects that cannot address the full required treatment area using post-construction BMPs.
Download the presentation from our 2022 Post-Construction BMP Workshop to learn more about our post-construction BMP criteria.
All Rights Reserved. Stormwater Maui. State of Hawaii Department of Transportation
