Vermont Guide to Stormwater Management for Homeowners and Small Businesses
The purpose of this guide is to help homeowners and small business owners who are not subject to stormwater permits and regulations identify ways to improve and protect water quality and manage stormwater runoff at its source. Green Stormwater Infrastructure (GSI) is an important part of this work. These practices either prevent runoff from occurring or treat it as close to the source as possible. GSI mimics nature as the practices slow down, filter, and infiltrate stormwater that would otherwise pollute our waterways. GSI increases groundwater recharge and property values; mitigates urban heat islands; reduces pollutants in stormwater and combined sewer overflows; improves air quality and human health; and improves and creates wildlife habitat and recreational space. GSI can improve your property, both in terms of stormwater treatment and aesthetic appeal.
2017 Vermont Stormwater Management Manual Rule and Design Guidance
New methodologies – variously referred to as low impact development, environmental site design, and green stormwater infrastructure – have been developed for managing stormwater runoff. These methodologies include an emphasis on the application of small-scale management practices that minimize stormwater runoff, disperse runoff across multiple locations, and utilize a more naturalized system approach to runoff management. This Manual expands and retools the unified approach for designing and sizing stormwater treatment practices. State-of-the-art BMPs for stormwater management are incorporated in a suite of treatment standards that are protective of water quality, hydrologic conditions including channel stability and groundwater recharge, overbank flood protection, and extreme flood control. In addition, this Manual includes site planning and design considerations for the siting of stormwater infrastructure to protect the natural landscape.
Low Impact Development LID and GSI Stormwater Management Bylaw
Model stormwater bylaw for Vermont municipalities.
Green Stormwater Infrastructure (GSI) Simplified Sizing Tool for Small Projects
This guidance and attendant suite of tools was created with the goal of making stormwater management more accessible to small and moderately-sized towns seeking to manage stormwater from development and re- development projects that fall below the permitting thresholds for state stormwater permitting. This suite of tools can be utilized to size, and aid in the review of, green stormwater infrastructure best management practices (BMPs) for small projects – projects creating up to ½-acre of impervious surface. The sizing criteria for BMPs included in this guidance are calibrated to meet the draft Water Quality Treatment Standard, which will require treatment of the “first inch” of runoff from proposed impervious surfaces.
Model Stormwater Standards for Coastal Watershed Communities
The purpose of these standards is to control non-point source pollution from future development, mitigate and reduce non-point source pollution from existing development, and manage the quality and quantity of surface water and groundwater resources.
The term green infrastructure generally refers to stormwater management systems and practices that use or mimic natural processes to infiltrate, evapotranspirate (the return of water to the atmosphere either through evaporation or by plants), or reuse stormwater on the site where it is generated.
Permanent (Post-Construction) Stormwater Management
Small-scale developments can have serious, cumulative impacts on water quality. To mitigate these effects, communities are encouraged to adopt a local stormwater management ordinance instituting stormwater controls for projects of all sizes during all phases of development.
Erosion and Sediment Control During Construction
The development process typically involves the removal of vegetation, the alteration of topography, and the covering of previously vegetated surfaces with impervious cover such as roads, driveways and buildings. These changes may result in the erosion of soil and the sedimentation of water bodies unless structural and non-structural methods and management and planning techniques are used.
LID Guidance Manual for Maine Communities: Approaches for implementation of Low Impact Development practices at the local level
The purpose of this guidance manual is to help municipalities implement low impact development (LID) practices on small, locally permitted development projects. This manual provides a recommended set of LID standards and guidance on implementing LID practices. LID practices are a set of site development strategies that are designed to mimic natural hydrologic function by reducing stormwater runoff and increasing groundwater recharge and pollutant treatment.