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HomeMy WebLinkAboutSP-23-32 - Supplemental - 0095 Swift Street (3)1 Monika Ingalls From:Heath, Tina <Tina.Heath@vermont.gov> Sent:Tuesday, January 31, 2023 2:32 PM To:Monika Ingalls Cc:Dave Wheeler; Tom DiPietro Subject:RE: 'EXTERNAL'RE: Farrell Street Dog Park Drainage Improvements Thanks for the details. Based on the description of work within the managed lawn buffer the proposal you described would qualify as an allowed use. Let me know if you have any questions. Best, Tina Tina Heath District Wetland Ecologist – Chittenden County Wetland Bioassessment Coordinator VT Department of Environmental Conservation Watershed Management Division, Wetlands Program 111 West Street | Essex Junction, VT 05452 802-490-6202 https://dec.vermont.gov/watershed/wetlands During the growing season (April – October) I am in the field 2-3 days per week and may not be immediately able to respond to inquiries. I am typically able to respond within a work week. Note that the Agency of Natural Resources has embraced telework and I do not generally operate out of the Essex District Office. I am available via email, telephone, and scheduled site visits. From: Monika Ingalls <moingalls@southburlingtonvt.gov> Sent: Friday, January 27, 2023 4:08 PM To: Heath, Tina <Tina.Heath@vermont.gov> Cc: Dave Wheeler <dwheeler@southburlingtonvt.gov>; Tom DiPietro <tdipietro@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'RE: Farrell Street Dog Park Drainage Improvements EXTERNAL SENDER: Do not open attachments or click on links unless you recognize and trust the sender. Hi Tina, Our intention is to crown the site with some added fill, yes. Our current iteration of grading ranges between ~4 in of cut and ~1 ft of fill. Thanks, Monika Ingalls Stormwater Project Manager Department of Public Works City of South Burlington 104 Landfill Road South Burlington, VT 05403 (802) 658-7961 Ext. 6108 2 Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation. From: Heath, Tina <Tina.Heath@vermont.gov> Sent: Tuesday, January 24, 2023 10:38 AM To: Monika Ingalls <moingalls@southburlingtonvt.gov> Cc: Dave Wheeler <dwheeler@southburlingtonvt.gov>; Tom DiPietro <tdipietro@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'RE: Farrell Street Dog Park Drainage Improvements Hi Monika, Thanks for the revised plans. A couple of questions: (1) would fill be added to the site for crowning? (2) what would be the difference in grade? 6 inches, 12 inches, etc. Tina Tina Heath District Wetland Ecologist – Chittenden County Wetland Bioassessment Coordinator VT Department of Environmental Conservation Watershed Management Division, Wetlands Program 111 West Street | Essex Junction, VT 05452 802-490-6202 https://dec.vermont.gov/watershed/wetlands During the growing season (April – October) I am in the field 2-3 days per week and may not be immediately able to respond to inquiries. I am typically able to respond within a work week. Note that the Agency of Natural Resources has embraced telework and I do not generally operate out of the Essex District Office. I am available via email, telephone, and scheduled site visits. From: Monika Ingalls <moingalls@southburlingtonvt.gov> Sent: Thursday, January 19, 2023 4:06 PM To: Heath, Tina <Tina.Heath@vermont.gov> Cc: Dave Wheeler <dwheeler@southburlingtonvt.gov>; Tom DiPietro <tdipietro@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'RE: Farrell Street Dog Park Drainage Improvements EXTERNAL SENDER: Do not open attachments or click on links unless you recognize and trust the sender. Hi Tina, We have given some further thought to solutions for the dog park and have created the attached revised sketch plan. The newest sketch involves regrading the dog park, as well as moving the existing bike path north and restoring a portion of the bike path and gravel parking area to grass (see the green area on the attached sketch plan). Increasing the size of the dog park will provide adequate area to regrade and raise the elevation at the center of the dog park to improve site drainage. Runoff from half of the site will flow north toward the paved road and the other half will flow into the wetland. This layout will also decrease the amount of impervious surface within the wetland buffer, as well as the amount of runoff from impervious surfaces that flows into the wetland. Let me know your thoughts on this sketch plan. Thank you, Monika Ingalls Stormwater Project Manager Department of Public Works 3 City of South Burlington 104 Landfill Road South Burlington, VT 05403 (802) 658-7961 Ext. 6108 Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation. From: Heath, Tina <Tina.Heath@vermont.gov> Sent: Wednesday, December 14, 2022 4:50 PM To: Monika Ingalls <moingalls@southburlingtonvt.gov> Cc: Dave Wheeler <dwheeler@southburlingtonvt.gov>; Andres Torizzo <andres@watershedca.com>; Tom Dipietro <tdipietro@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'RE: Farrell Street Dog Park Drainage Improvements Hi Monika, thanks for the details. It seems the problem is the concentrated high use of the area that’s compacting the soils. With existing conditions does the water infiltrate into the ground over time or eventually finds its way to the wetland via sheet flow? If the wetland is unlikely to receive runoff for most of the year then I’m not understanding why an outfall has to be constructed through the buffer zone to the wetland edge at the toe of slope. Could the dry well installation be enough of a solution to alleviate the ponded surface water that happens once or twice a year? Tina Heath District Wetland Ecologist – Chittenden County Wetland Bioassessment Coordinator VT Department of Environmental Conservation Watershed Management Division, Wetlands Program 111 West Street | Essex Junction, VT 05452 802-490-6202 https://dec.vermont.gov/watershed/wetlands During the growing season (April – October) I am in the field 2-3 days per week and may not be immediately able to respond to inquiries. I am typically able to respond within a work week. Note that the Agency of Natural Resources has embraced telework and I do not generally operate out of the Essex District Office. I am available via email, telephone, and scheduled site visits. From: Monika Ingalls <moingalls@southburlingtonvt.gov> Sent: Thursday, December 8, 2022 1:36 PM To: Heath, Tina <Tina.Heath@vermont.gov> Cc: Dave Wheeler <dwheeler@southburlingtonvt.gov>; Andres Torizzo <andres@watershedca.com>; Tom Dipietro <tdipietro@southburlingtonvt.gov> Subject: RE: 'EXTERNAL'RE: Farrell Street Dog Park Drainage Improvements EXTERNAL SENDER: Do not open attachments or click on links unless you recognize and trust the sender. Hi Tina, Thank you for getting back to me on this. We have considered filling and grading, however these options will not provide treatment before discharge into the wetland, as the grades steepen quickly and don’t allow room for disconnection of runoff from the park prior to discharge into the wetland. The proposed French drains could incorporate sand filtering with an underdrain, which is a Tier 3 practice per the 2017 VSMM and has 50-60% TP removal. Through this filtering, the 4 discharge to the wetland would be treated and better quality than runoff that may discharge into the wetland currently. Lastly, it is likely that throughout most of the year, runoff will not discharge into the wetland, only when the water table is at its highest and does not allow for infiltration. We could provide modelling of proposed stormwater conditions to determine under what conditions water will be flowing into the wetland if you would like. Thank you, Monika Ingalls Stormwater Project Manager Department of Public Works City of South Burlington 104 Landfill Road South Burlington, VT 05403 (802) 658-7961 Ext. 6108 Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation. From: Heath, Tina <Tina.Heath@vermont.gov> Sent: Wednesday, December 7, 2022 3:04 PM To: Monika Ingalls <moingalls@southburlingtonvt.gov> Cc: Dave Wheeler <dwheeler@southburlingtonvt.gov>; Andres Torizzo <andres@watershedca.com>; Tom Dipietro <tdipietro@southburlingtonvt.gov> Subject: 'EXTERNAL'RE: Farrell Street Dog Park Drainage Improvements This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email. Hi Monika, Thanks for contacting me. I provided my initial thoughts on an underdrain proposal last spring where I had concerns about discharging runoff from the dog park into the wetland. I had asked about looking at other options like filling, grading, crowning, etc. to help address the wet issues, which could be approvable with a permit if some encroachment into the buffer zone is necessary. Would the outlet be discharging “treated” or cleaner water with this proposal? Has the filling/grading option been explored? The biggest concern is discharging concentrated dirty water directly in to the wetland. Tina Tina Heath District Wetland Ecologist – Chittenden County Wetland Bioassessment Coordinator VT Department of Environmental Conservation Watershed Management Division, Wetlands Program 111 West Street | Essex Junction, VT 05452 5 802-490-6202 https://dec.vermont.gov/watershed/wetlands During the growing season (April – October) I am in the field 2-3 days per week and may not be immediately able to respond to inquiries. I am typically able to respond within a work week. Note that the Agency of Natural Resources has embraced telework and I do not generally operate out of the Essex District Office. I am available via email, telephone, and scheduled site visits. From: Monika Ingalls <moingalls@southburlingtonvt.gov> Sent: Friday, December 2, 2022 3:39 PM To: Heath, Tina <Tina.Heath@vermont.gov> Cc: Dave Wheeler <dwheeler@southburlingtonvt.gov>; Andres Torizzo <andres@watershedca.com>; Tom Dipietro <tdipietro@southburlingtonvt.gov> Subject: Farrell Street Dog Park Drainage Improvements EXTERNAL SENDER: Do not open attachments or click on links unless you recognize and trust the sender. Hi Tina, I’m reaching out regarding the Farrell Street Dog Park in South Burlington and its existing drainage issues and potential improvements. We have a sketch plan for potential improvements for the dog park, attached to this email. The existing site ponds in the north (see pictures attached) and has difficulty keeping vegetation. The proposed site will have a yard drain that will connect to a dry well via a perforated pipe which will double as a French drain. Test pits were completed to explore the existing soils onsite. Based on this investigation, we think that the soil will likely infiltrate most of the year, but the dry well will still need an outlet pipe for relief when groundwater is at its highest. The proposed outlet is within the assumed wetland buffer and would discharge to the east of the site. We wanted to send this sketch to garner your initial thoughts, as the sketch proposes impact to the wetland buffer to construct the outlet pipe. We would be open to discussing mitigation options for impacting the wetland buffer. Let me know what you think – we could also discuss over the phone if that would be easier. Thank you, Monika Ingalls Stormwater Project Manager Department of Public Works City of South Burlington 104 Landfill Road South Burlington, VT 05403 (802) 658-7961 Ext. 6108 Notice - Under Vermont’s Public Records Act, all e-mail, e-mail attachments as well as paper copies of documents received or prepared for use in matters concerning City business, concerning a City official or staff, or containing information relating to City business are likely to be regarded as public records which may be inspected by any person upon request, unless otherwise made confidential by law. If you have received this message in error, please notify us immediately by return email. Thank you for your cooperation.