Description: This data was collected and compiled for various towns in Vermont and shows as accurately as possible the stormwater infrastructure within these municipalities. Line data was collected and compiled through field observations determining pipe locations and directions on ortho-photos, digitizing of georeferenced town plans and record drawings, the digitizing of state stormwater permit plans, and the knowledge of members of the municipality. The points, lines, and polygons, show the locations and connections of various features of the stormwater infrastructure, as well as some points included for additional information. Drainage systems were mapped to establish the connectivity of the stormwater features, and to show where runoff from impervious surfaces in various subwatersheds within an urbanized area eventually enters the receiving water. Subwatershed boundaries were drawn using field data, topographic maps, and a Digital Elevation Models (DEM). Retrofit stormwater treatment best management practices and locations were suggested for the highest priority subwatersheds, where feasible, in order to treat the runoff before it enters the receiving water.
Description: This data was collected and compiled for various towns in Vermont and shows as accurately as possible the stormwater infrastructure within these municipalities. Line data was collected and compiled through field observations determining pipe locations and directions on ortho-photos, digitizing of georeferenced town plans and record drawings, the digitizing of state stormwater permit plans, and the knowledge of members of the municipality. The points, lines, and polygons, show the locations and connections of various features of the stormwater infrastructure, as well as some points included for additional information. Drainage systems were mapped to establish the connectivity of the stormwater features, and to show where runoff from impervious surfaces in various subwatersheds within an urbanized area eventually enters the receiving water. Subwatershed boundaries were drawn using field data, topographic maps, and a Digital Elevation Models (DEM). Retrofit stormwater treatment best management practices and locations were suggested for the highest priority subwatersheds, where feasible, in order to treat the runoff before it enters the receiving water.
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Description: The REI reassessment shall include all hydrologically-connected municipal road segments. This includes all hydrologically-connected road segments that appear on the ANR Atlas at the time that the REI is conducted, as well as all road segments likely to discharge to waters or wetlands. All hydrologically-connected road segments depicted onthe ANR Atlas shall be field visited and evaluated using the REI Form. Additionally, the applicant may propose to add road segments to its REI based on an evaluation of the following criteria:1. For closed drainage roads : the catch basin outlet pipe is within 500 feet of a water of the State or wetland.2. For all other municipal roads:a) The municipal road segment is within 100 feet of a water of the State or wetland;b) The municipal road segment bisects any water of the State or wetland, or a defined channel;c) The municipal road segment is uphill from, and drains to, a municipal road that bisects a water of the State or wetland, and should be included in the REI to accurately capture the extent of the stormwater watershed.If a road segment appears on the ANR Atlas and none of the above conditions are observed in the field, municipalities may propose to re-classify a segment as not hydrologically connected. Alternately, if none of the above conditions are observed in the field, but the segment is likely to discharge to waters or wetlands, a permittee shall propose to add this segment to the inventory following a field evaluation.The addition or removal of any road segments not appearing on the ANR Atlas must be documented as part of the REI, and justification for the removal or addition shall be included in the Implementation Table.The Secretary may determine at any time that a road segment not identified on the ANR Atlas is hydrologically connected, based on the criteria listed above, as well as other site specific factors that indicate the likelihood of a discharge, including slope, soil type, proximity to waters, etc. When the Secretary determines that an unmapped road segment is hydrologically connected and informs the municipality of its determination, thepermittee shall include the segment in its Implementation Table as part of the next annual report.
Description: Stormwater impaired watersheds occuring on both the Priority Waters (Part D - Completed TMDL) and 303(d) list of waters (Part A - need TMDL) The Vermont State Legislature has required the Agency of Natural Resources (ANR) to develop water quality remediation plans for each of the stormwater impaired waters listed on the year 2004 303(d) list of impaired waters. This effort, the Vermont Stormwater Project, is being executed by the Stormwater Management Section (SMS) of the Water Quality Division (WQD) using the "Stormwater Cleanup Plan Framework" publication as guidance in developing these remediation plans. The term "303(d)" refers to a section of the Federal Clean Water Act that requires all states to develop lists of impaired waters not meeting Water Quality Standards. The Federal Clean Water Act requires "Total Maximum Daily Loads" (TMDLs) to be developed for waters on the list along with a schedule for implementation. "A TMDL is the calculation of the maximum amount of a pollutant that a water body can receive and still meet Vermont Water Quality Standards. In a broader sense, a TMDL is a plan that identifies the pollutant reductions a water body needs to meet Vermont's Water Quality Standards and develops a means to implement those reductions."
Copyright Text: ANR/WQD/SMS; Pioneer Environmental Associates, LCC., R. J. Turner Company and VCGI, Inc.