This stormwater and watershed assessment took place from July 2022 to June 2023 to study Allen Brook watershed’s current water quality conditions within the Town of Milton and to investigate where stormwater Best Management Practices (BMPs) can be prioritized to manage runoff from developed lands within the watershed. Representatives of Watershed Consulting met with representatives from the VT DEC, CCRPC, and the Town of Milton to discuss the timeline and goals of this assessment in July 2022. From discussion with key stakeholders, it is known that over the past fifteen years, numerous water quality, fluvial erosion, and biological community assessments have been conducted in this watershed to assess the health of Allen Brook. From these assessments, it is known that Allen Brook is at risk of impairment when measured by its chemical and biological health. This study builds off of a variety of previous assessments in order to understand the source of pollutants, such as nutrients, chloride, and sediment, that have contributed to the impairment of Allen Brook. This assessment successfully used these findings to target stormwater BMPs in key areas of concern that will effectively treat stormwater runoff before it discharges to Allen Brook and ultimately Malletts Bay.

A stormwater outfall just southwest of Elm St drains into a ravine that flows into wetlands within the Winooski River floodplain. Flow from the outfall was dropping into a channel before draining into the ravine. The drop below the outfall is several feet, and, prior to retrofit, the channel surface was bare soil. As a result, flow from the outfall was eroding the channel, sending sediment into the ravine and the downstream wetlands. The goal of the project was to develop a final design to stabilize the channel with geotextiles and controlled fills and raise grades below the outfall to dissipate energy during flows. The project required building temporary access to the channel and associated temporary erosion control measures. The project will reduce erosion from the channel and reduce sedimentation of the downstream wetlands. NOTE: Using this design, the City then constructed this stabilization project in the fall of 2020 using a VTRANS Better Roads grant along with City funds.

The CCRPC selected Watershed Consulting Associates (WCA) for initial scoping, assessment, alternatives analysis, and 30% design development for the replacement of two (2) culverts on Densmore Drive in Essex Junction, VT.

The intent of this report is to present the data collected, evaluations, analyses, designs, and cost estimates for subwatersheds in Underhill under a contract between the Chittenden County Regional Planning Commission and Watershed Consulting Associates, LLC. Funding for the project was provided by a Vermont Department of Environmental Conservation, Clean Water Fund grant. The plan presented is intended to provide the watershed’s stakeholders a means by which to identify and prioritize future stormwater management efforts. This planning study presents a recommended collection of Best Management Practices (BMPs) that would address specific concerns that have been raised for these areas. In particular, there is great need to reduce stormwater impacts including phosphorus and sediment from stormwater runoff to receiving waters within the Town and the greater Lake Champlain Basin in light of future regulation under the Lake Champlain Total Maximum Daily Load requirements. Although there are other BMP strategies that could be implemented in the watershed, these are the sites and practices that project stakeholders believe will have the greatest impact and probability of implementation. These practices do not represent a regulatory obligation, nor is any property owner within the watershed obligated to implement them. This stormwater master plan, and therefore its resultant strategies, will be one of the actions in the Lamoille Tactical Basin Plan. This will put the BMP strategies in queue for state funding for implementation.

The purpose of this stormwater master plan was to identify a comprehensive system of low-impact development treatment practices to address an increase in impervious surfaces and mitigate drainage issues to reduce the amount of sediment and nutrients from entering the Town’s waterbodies. CCRPC staff worked alongside Watershed Associates and Town officials to further the development of this stormwater master plan. The project was completed in April 2017

The intent of this report is to present the data collected, evaluations, analyses, designs, and cost estimates for subwatersheds in Jericho under a contract between the Chittenden County Regional Planning Commission and Watershed Consulting Associates, LLC. Funding for the project was provided by the Vermont Department of Environmental Conservation’s Ecosystem Restoration Program. The plan presented is intended to provide the watershed’s stakeholders a means by which to identify and prioritize future stormwater management efforts. This planning study presents a recommended collection of Best Management Practices (BMPs) that would address specific concerns that have been raised for these areas. In particular, there is great need to reduce stormwater impacts including phosphorus and sediment from stormwater runoff to receiving waters within the Town and the greater Lake Champlain Basin in light of future regulation under the Lake Champlain Total Maximum Daily Load. Although there are other BMP strategies that could be implemented in the watershed, these are the sites and practices that project stakeholders believe will have the greatest impact and probability of implementation. These practices do not represent a regulatory obligation of any type, nor is any property owner within the watershed obligated to implement them. Please contact CCRPC if you would like a copy of the referenced Appendices.