叶子已经改变，雪开始落在全国各地的几个地方。到这个时候，建设项目疯狂地试图涂上分级，景观和其他户外任务。但是你的项目在本赛季期间俯瞰着大型雨水任务？
As we know, northern winters in the U.S. can be brutally cold, snowy, or mild with little to no snow. Preparing your site to handle the winter will greatly reduce your stormwater best management practice (BMP) maintenance and allow a quicker return to work come spring. Here are a few tips and tricks project owners and supervisors should be considering:
1. The best winter BMP is established vegetation. Consider the germination time when preparing your site for the winter.
2. Seed & crimped straw is a recommended temporary stabilization technique for nearly all scenarios. Ensure the straw is properly crimped into thawed ground before freezing up conditions. October 15this a key date to finish stabilizing soils in preparation for winter.
a. If winter has snuck up on you, stabilization is still required, but techniques change. Crimping is difficult or impossible after the ground freezes. TheMinnesota Stormwater Manualhas some great resources on snow mulching where they detail how to stabilize after winter has set in.
3. For projects in urban environments, evaluate your ability to move curbside perimeter controls (such as silt fence and filter logs) away from the curb to minimize snowplow damage.
4. Consider plow routes and locations where snow will be stored throughout your project site (if needed). Ensure perimeter controls will not be damaged as snow piles grow and melt run-off may concentrate and overwhelm BMPs.
5. If sanding and/or salting operations will occur on your site, consider the downstream cumulative effects to vegetation, soils, and permanent stormwater management features that are not fully constructed or established. Potential upgradient BMPs to divert flows from these areas may need to be installed before freeze up.
6. Clean your streets before any chance of freezing or snow. Sweepers and vac-sweepers are not able to work during the winter months. Skid-steers can be used to clean sediment from roads in the winter.
7. If your project is in Minnesota, inlet protections must remain installed throughout the winter. Several cities, counties, and watersheds have their own regulations that require inlet protections to be removed by certain dates, most are November 15th.
a. The Minnesota Pollution Control Agency does allow the temporary removal of inlet protections that if frozen, could create a public safety concern.
b. If any inlet protections are removed, or BMPs in general are moved or removed, documentation in the SWPPP is required.
8. Inspections can be suspended — if no ground disturbance is occurring —once your site has frozen ground conditions. However, if a warm-up occurs, weekly inspections do need to be started up again.
a. Additionally, if ground conditions remain frozen, but a day or two of warm weather occurs — after runoff, or post-storm event inspections, are required within 24 hours of the event. Runoff is defined as precipitation or melt water moving on site far enough to discharge from the site either via a perimeter control, or a permanent stormwater system.
通过冬季驾驶您网站的需求和要求是少数，更不用说NPDES许可。如果您的项目需要任何援助计划，准备，检查或以上，请随时伸出援手。雷竞技好Newbee赞助商布劳恩Intertec和我们的认证检查员会很乐意伸出援助之手。