The District helps area towns, businesses and landowners understand the need for and implementation of ‘Green’ stormwater projects, or those that incorporate natural water cycle principles into urban water drainage systems. Examples of green stormwater projects include those that increase the infiltration of stormwater at the source, such as capturing water from impervious roofs or paved areas and infiltrating it into a nearby rain garden or a larger, engineered bio-infiltration area.
Increasing the infiltration of stormwater can improve the water quality in nearby streams. Unfiltered water from rain events can carry a myriad of pollutants picked up on the urban landscape and enters streams and lakes very quickly through the stormdrain system, changing the hydrology of streams and increasing erosion. Studies have shown that small increases in impervious surfaces (effects are seen around 7% impervious surface area) can drastically change the hydrology of streams and negatively impact water quality. Application of Green Stormwater Infrastructure principles can help decrease these impacts.
To see more about PMNRCD and Stormwater Planning: Stormwater Planning
Pawlet Village Stormwater Planning
PMNRCD, in coordination with the Village of Pawlet, has recently identified multiple projects in the town center that may decrease the overland flow of water to Flower Brook during storm events. Stone Environmental is providing engineering expertise and is assisting the Village as they rank the identified projects for implementation. Most of the projects have received positive review from the residents and will likely be implemented. The District scheduled public meetings in 2016 to review potential project ideas with area residents and received funds in 2017 to implement projects. Project implementation may begin in 2018. Please contact us if you are interested in more information.
Castleton Watershed Stormwater Planning
In August, 2015, the District signed a contract with Vermont DEC to complete stormwater planning activities in the Lake Bomoseen watershed. Residents near Crystal Beach reported large influxes of sediment at the mouth of Sucker Brook and the Lake Bomoseen Water Quality Committee was interested in identifying and mitigating the sources of sediment. This project began in the fall of 2015 and continued through December, 2016.
During 2017, the District, with assistance from Fitzgerald Environmental Associates, identified 74 projects through the Castleton Headwaters Stormwater Assessment. Project partners hope that 2018 will bring the implementation of several of these projects. Please contact the District for more information about potential projects in your area.
Lake St Catherine Stormwater Planning
The District recently received a grant to both identify stormwater projects around the lake and to work with homeowners on Lake Wise certification. The stormwater study area includes the entire Lake St Catherine and Wells Brook watershed area. The area for the Lake Wise assessment and certification program includes shoreline properties along all areas of the lake. Please contact us if you would like a Lake Wise consultation. Consultations will be available beginning in June 2018 and ongoing for about a year, depending on funding and interest level of the residents.
The Town of Castleton was awarded a $15,998 Clean Water Block Grant for stormwater management at the Castleton Transfer Station. The Town worked with Poultney Mettowee NRCD and Fitzgerald Environmental Associates in assistance with funding procurement and project design.
Along with other sites in the area, stormwater issues were noted at the station during the formation of the Castleton Headwaters stormwater Assessment. The 2017 Assessment identified 74 areas in need of stormwater improvements or project implementation. The Castleton Transfer Station is one of the many projects aimed to be implemented from this assessment. Stormwater runoff accumulates from the side hill, driveway, and parking locations, causing ponding, rill and gully erosion at and around the Transfer Station site. This area is hydrologically connected through a series of culverts, eventually leading to Pond Hill Brook.
Construction was finalized in 2018 with installation including a pretreatment catch basin provinging 50cf of subsurface treatment, a sediment forebay, stable culvert connections, and a dry swale with 900cf capacity. These infiltration and treatment practices address the runoff from a drainage area of .56 acres with .46 acres of impervious surface. Stormwater funding and projects such as this help to protect water quality and improve the functionality and safety in Vermont towns.