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HomeMy WebLinkAboutAgenda 10_SP-24-34_870 Williston Road_AAM_SP#SP-24-34 1 CITY OF SOUTH BURLINGTON DEPARTMENT OF PLANNING AND ZONING AAM CATAMOUNT WOODS, LLC – 870 REAR WILLISTON ROAD SITE PLAN APPLICATION #SP-24-34 FINDINGS OF FACT AND DECISION Site plan application #SP-24-34 of AAM Catamount Woods, LLC to amend a previously approved plan for a 39.5 acre parcel developed with a parking lot. The amendment consists of expanding the existing stormwater treatment pond and reducing the number of parking spaces, 870 Rear Williston Road. The Development Review Board held a public hearing on September 17, 2024. The applicant was represented by xxxxx. Based on the plans and materials contained in the document file for this application, the Board finds, concludes, and decides the following: FINDINGS OF FACT 1. AAM Catamount Woods, LLC, hereinafter referred to as the applicant, is seeking to amend a previously approved plan for a 39.5 acre parcel developed with a parking lot. The amendment consists of expanding the existing stormwater treatment pond and reducing the number of parking spaces, 870 Rear Williston Road. 2. The owner of record of the subject property is the University of Vermont & State Agricultural College. 3. The subject property is located in the Commercial 1 – Residential 12 Zoning District, the Transit Overlay District, and the Traffic Overlay District. Portions of the property in proximity to the proposed development are located in a Habitat Block and a Class II Wetland. Portions of the property not proposed to be impacted by the proposed development are located in the River Corridor Overlay District and the 500 Year Floodplain Zone B2. 4. The application was received on August 15, 2024. 5. The applicant is proposing to expand a stormwater detention pond and convert it into a gravel wetland. The existing pond is to the rear of and captures runoff from the existing DoubleTree hotel but is technically on a different lot, owned by the University of Vermont and leased by the DoubleTree hotel for off-street vehicle parking. The project location is within the Habitat Block Overlay. 6. The plans submitted consist of: Sheet No. & Title Prepared by Plan Last Revised: C-100 – Overall Site Plan Krebs & Lansing 8/13/2024 C-101 – Site Plan Gravel Wetland & Storm Collection Krebs & Lansing 8/13/2024 C-200 – Existing Condition Plan Krebs & Lansing 8/2/2024 C-300 – EPSC Plan Krebs & Lansing 8/2/2024 CH400 – Civil Details Krebs & Lansing 8/2/2024 C-401 – Civil Details Krebs & Lansing 8/2/2024 C-402 – Civil Details Krebs & Lansing 8/2/2024 C-403 – Civil Details Krebs & Lansing 8/2/2024 #SP-24-34 2 A) ZONING DISTRICT & DIMENSIONAL REQUIREMENTS Setbacks, Coverages & Lot Dimensions Commercial 1-R15 Required Existing Proposed  Min. Lot Size 40,000 sf 39.5 acres No change  Max. Building Coverage 40 % 0% No change  Max. Overall Coverage 70 % 15.26% 15.16 %  Max. Front Setback Coverage 30 % Not provided No change  Min. Front Setback 30 ft N/A No change  Min. Side Setback 10 ft N/A No change  Min. Rear Setback 30 ft N/A No change  Max. Total Stories 5 stories N/A No change B) SITE PLAN REVIEW STANDARDS 14.06 General Review Standards A. Relationship of Proposed Structures to the Site. (1) The site shall be planned to accomplish a desirable transition from structure to site, from structure to structure, and to provide for adequate planting, safe pedestrian movement, and adequate parking areas. No changes to structures or pedestrian movement are proposed. The applicant is proposing to eliminate 40 head-in parking spaces from the portion of the parking lot that is directly adjacent to the existing stormwater detention pond and to construct 12 parallel parking spaces in the same area. The Board finds that this change has no impact on any of the above criteria, given that project area’s relative distance from any structures or pedestrian walkways. (2) Parking (a) Parking shall be located to the rear or sides of buildings. Any side of a building facing a public street shall be considered a front side of a building for the purposes of this subsection. The applicant is proposing to re-stripe a parking area in such a way that reduces the number of parking spaces and thereby decreases the extent of the existing non-conformity of a stand- alone commercial parking lot with no Conditional Use approval. The Board finds this criterion met. (3) Without restricting the permissible limits of the applicable zoning district, the height and scale of each building shall be compatible with its site and existing or anticipated adjoining buildings. As noted above, no buildings are proposed to be constructed or altered as part of this application. B. Relationship of Structures and Site to Adjoining Area. (1) The Development Review Board shall encourage the use of a combination of common materials and architectural characteristics (e.g., rhythm, color, texture, form or detailing), landscaping, buffers, screens and visual interruptions to create attractive transitions between buildings of different architectural styles. (2) Proposed structures shall be related harmoniously to themselves, the terrain and to existing buildings and roads in the vicinity that have a visual relationship to the proposed structures. #SP-24-34 3 No changes to buildings or structures are proposed. As such, the above criteria are inapplicable. C. Site Amenity Requirement. Site Amenities are only required in conjunction with new or substantially expanded structures. No buildings are proposed to be constructed or expanded as part of this application. 14.07 Specific Review Standards A. Environmental Protection Standards. All proposed development shall be subject to the applicable requirements of Article 12, Environmental Protection Standards. Standards of Article 12 are discussed below. The property includes area of Special Flood Hazard, Habitat Block, River Corridor, Very Steep Slopes, Class II wetlands and Class II wetland buffers. Only habitat blocks are proposed to be impacted, discussed below under 12.04 Habitat Block Overlay District. B. Site Design Features. All proposed development shall comply with standards for the placement of buildings, parking and loading areas, landscaping and screening, open space, stormwater, lighting, and other applicable standards related to site design pursuant to these Land Development Regulations. The purpose of this application is to provide stormwater treatment. The standards mentioned in this criterion are included in Article 13 and are discussed below. C. Access and Circulation. All proposed development shall comply with site access and circulation standards of Section 15.A.14. No changes affecting compliance with this criterion are proposed. D. Transportation Demand Management (TDM) [reserved] E. Building Form. Development within the City Center Form Based Code District, the Urban Design Overlay District, and other districts with supplemental building form standards shall adhere to the standards contained therein. No new or modified buildings are proposed as part of this application. F. Streetscape Improvements. A proposed new construction or extension/expansion of an existing structure exceeding the thresholds listed in either (a) Section 14.09(B) or (b) Section 8.11(D) within the City Center Form Based Code, or Section 3.11(D) in all other zoning districts, shall be required to upgrade adjacent sidewalks, greenbelts, and related street furniture (trees, benches, etc.) to the standards contained within the applicable Street Type and Building Envelope Standard. Nothing in this subsection shall be construed to limit requirements for additional upgrades as necessary to meet the requirements of these Regulations. No modifications to a structure are proposed. G. Access to Abutting Properties. The reservation of land may be required on any lot for provision of access to abutting properties whenever such access is deemed necessary to reduce curb cuts onto an arterial or collector street, to provide additional access for emergency or other purposes, or to improve general access and circulation in the area. No changes affecting compliance with this criterion are proposed. H. Utility Services. Electric, telephone and other wire-served utility lines and service connections shall be underground insofar as feasible and subject to state public utilities regulations. Any utility installations remaining above ground shall be located so as to have a #SP-24-34 4 harmonious relation to neighboring properties and to the site. Standards of Section 15.A.18, Infrastructure, Utilities, and Services, shall also be met. No changes affecting compliance with this criterion are proposed. I. Disposal of Wastes. All dumpsters and other facilities to handle solid waste, including compliance with any recycling, composting, or other requirements, shall be accessible, secure and properly screened with opaque fencing to ensure that trash and debris do not escape the enclosure(s). Small receptacles intended for use by households or the public (ie, non-dumpster, non-large drum) shall not be required to be fenced or screened. No changes affecting compliance with this criterion are proposed. C) ARTICLE 12: ENVIRONMENTAL PROTECTION STANDARDS A portion of the project is located in a Habitat Block, shown on Sheet C-100. 12.04 Habitat Block Overlay District B. Applicability. The requirements of this Section apply to all areas indicated as “Habitat Blocks” on the Habitat Block and Habitat Connector Overlay Districts Map, except as follows: (1) On lots less than one (1) acre in size existing as of November 10, 2021; (2) On land located within a 50-foot horizontal distance of a principal building existing on the same parcel as of the effective date of these regulations; (3) On land authorized by the Development Review Board to be removed from or added to a Habitat Block pursuant to the modification options of this section or as part of a Conservation Planned Unit Development. The subject property does not qualify for any of the above exceptions. C. Application Submittal Requirements. The applicant has submitted a complete application for Board review. D. Modification of Habitat Block. An applicant may request approval from the Development Review Board to modify a Habitat Block in any of the following manners. An applicant may select any one of the three modification options below. A development application may not include more than one option for any application. Land located within the SEQ-NRP zoning sub-district, Hazards, or Level I Resources, previously approved as open space or conserved land, subject to a deed restriction prohibiting development, subject to a conservation or density reduction easement, or owned by the City of South Burlington or the Winooski Valley Parks District and designated as a park or conservation parcel shall not be eligible for any of the three options to modify a Habitat Block. The land proposed to be removed from the Habitat Block designation does not fall under one of the enumerated categories above and is therefore eligible for Habitat Block modification. 1. Minor Habitat Block Boundary Adjustment. An applicant may apply to modify the boundary of a Habitat Block by up to fifty (50) feet in any direction to account for site-specific conditions, upon written request by the applicant as part of the requisite application. The applicant is proposing to move the existing boundary of the Habitat Block by over 50 feet. As such, their proposal cannot be approved via a Minor Habitat Block Boundary Adjustment. #SP-24-34 5 2. Small On-Site Habitat Block Exchange. An applicant may apply to exchange a portion of a Habitat Block not to exceed two (2) acres or ten (10) percent of the application’s total land area, whichever is less, for an equal amount of land within the same Planned Unit Development or Site Plan upon written request, without requiring a Habitat and Disturbance Assessment. Such land exchange must not include Core Habitat Block Areas and shall not eliminate existing Habitat Connectors. The land to be protected through the exchange may be located separate from the Habitat Block. To approve a small on-site habitat block exchange, the Development Review Board shall require the applicant to: a. Retain a similar or greater quality and maturity of vegetation within the proposed areas for exchange; and b. Prioritize the retention of forest stands that include trees measuring 9 inches diameter at breast height (dbh) within the exchange area. The portion of the property that the applicant is proposing to designate as Habitat Block is surrounded on 3 sides by existing Habitat Block, but has no trees measuring 9” dbh. However, it does have vegetation of a similar or greater quality & maturity as the area proposed to be removed from Habitat Block designation, which is just the northern portion of an existing stormwater detention pond. The area proposed to be exchanged is 2,430 sf, which does not exceed 2 acres or 10% of the total lot size. It also does not include a Core Habitat Block Area or a Habitat Connector. Seeing as the proposed on-site Habitat Block addition meets all of the above criteria, the Board finds that the proposed Small On-Site Habitat Block Exchange is permissible. 3. Larger Area Habitat Block Exchange. An applicant may apply to exchange a portion of a Habitat Block for the addition of an equal amount of contiguous land within the same Habitat Block upon written request, and pursuant to the standards of this Section. The applicant can accomplish their goal using the Small On-Site Habitat Block Exchange process outlined above. The applicant is not proposing a Larger Area Habitat Block Exchange. D) SUPPLEMENTAL STANDARDS 13.02 Off-Street Parking & Loading A. Purpose. Parking areas and off-street loading, where provided, shall be designed in a manner that minimizes traffic congestion, air pollution, and the risk of motor vehicle and pedestrian accidents, as well as to promote other elements of sound community planning. B. Determination of Parking Spaces. There is no minimum or maximum number of vehicle parking spaces required to be provided for this use. The Board finds this standard to not be applicable. C. Location of Off Street Parking, Loading, and Vehicle Entrances. No impacts to the entries or exits for this existing off-street parking area are proposed. D. Off-Site Parking. No off-site parking is proposed as part of this project. E. Shared Parking On A Single Lot. No shared parking agreement is proposed as part of this project. #SP-24-34 6 F. Access Management Requirements. The subject property is a ‘commercial lot’. There are existing inter-lot connections between the subject property and both of the adjacent commercial parcels to the south. The Board finds this criterion met. G. Design Requirements for Parking Spaces, Parking Aisles, Lighting, and Landscaping. 1) Design requirements for off-street parking and loading are provided in Table 13-2 and Figure 13-1, Section 13.04, Landscaping, Screening, and Street Trees, and Section 13.07, Exterior Lighting. All paved parking spaces shall be striped or otherwise physically delimited. Parking lot landscaping standards are discussed in further detail under Section 13.04 below. 2) The location of parking areas and loading docks shall prevent conflicts with entering and exiting traffic onto a public street and prevent conflicts between vehicles and pedestrians. The distance between access points and parking areas shall be adequate to minimize blockage and prevent back-ups onto the public street. The existing location of the parking area is not being altered as part of this application and the distance from the parking area to the access point is not being impacted. 3) Provision shall be made for access by police, fire and emergency vehicles. Existing emergency access is not being impacted as part of this project. The Fire Marshal reviewed these plans on 9/6/2024 and had no comments. 4) Pedestrian safety. Insofar as practicable, pedestrian and bicycle circulation shall be separated from motor vehicle circulation. Safe and convenient pedestrian circulation, including appropriate sidewalks, shall be provided on the site and its approaches. The pedestrian circulation on site shall be designed to minimize adverse effects of vehicular traffic on sidewalks and recreation paths. The proposed new parallel parking spaces are not in proximity to any pedestrian walkways, and do not pose any undue conflicts between motor vehicle circulation and pedestrian safety. 5) Bicycle Parking Or Storage Facility. See Section 13.03 Short-term and long-term bike parking facilities addressed in further detail under Section 13.03 below. 6) Stormwater management strategies that facilitate infiltration including but not limited to recessed planting islands, bioretention facilities, and pervious parking spaces are encouraged in the design of any off-street parking or loading area. The purpose of this project is to improve the existing stormwater treatment infrastructure on the subject property. The Applicant has submitted concurrent site plan application #SP-24-08, which is the driving factor necessitating improvements of the stormwater pond on the subject property. The City Stormwater Section reviewed site plan #SP-24-08 and provided comprehensive comments that pertain to both that application and this application. Those comments do not necessitate physical changes to the improvements proposed in this application and will be addressed as part of site plan #SP-24-08. H. Handicapped Accessible Parking Spaces. The applicant must comply with current ADA Accessibility Guidelines. #SP-24-34 7 I. Recreational Vehicles. No RV storage or parking is proposed as part of this project. J. Parking Reserved for Future Use. No reservation of parking is proposed or required as part of this project. K. Structured Parking. No parking garages or other parking structures are proposed as part of this project. L. Reserved Parking Spaces. No off-site parking is proposed as part of this project. M. Modifications of Requirements. No modifications to the specified parking lot dimensions have been requested as part of this application. The applicant is proposing to provide twelve 8’ x 22’ parallel parking spaces with a drive aisle of at least 12’ in width, meeting the requirements of the parking lot dimensions specified in Table 13-2. 13.04 Landscaping, Screening, and Street Trees A. Purpose. B. Landscaping of Parking Areas. Except for parking spaces accessory to a one-family or two-family dwelling, all off-street parking areas subject to review by the Development Review Board, shall be curbed and landscaped with appropriate trees, shrubs, and other plants including ground covers, as approved by the Development Review Board. Sections of recessed curb are permitted if their purpose is to allow stormwater runoff from the adjacent parking area to reach stormwater collection, treatment and management infrastructure. The Development Review Board shall consider the adequacy of the proposed landscaping to assure the establishment of a safe, convenient, and attractive parking area and the privacy and comfort of abutting properties. The applicant is proposing to reduce the size of the existing parking area in order to expand the size of the existing stormwater treatment feature. In reducing the size of the existing parking area, the applicant is proposing to remove 40 head-in parking spaces and convert the remaining pavement in that area to 12 parallel parking spaces. 1. All off-street parking areas shall be landscaped around the perimeter of the lot with trees, shrubs and other plants. Perimeter planting shall be set back from the curb sufficiently to allow for snow storage. The purpose of perimeter planting shall be to mitigate the view of the parking lot from the public way and from adjacent uses and properties, and to provide shade and canopy for the parking lot. In some situations it may be necessary both for surveillance purposes and for the perception of safety to install the size and type of plants that leave visual access between the parking lot to the public way or other pedestrian areas. The applicant is providing to curb the altered portion of the existing parking area. The applicant is not proposing to install any additional perimeter landscaping next to the altered portion of the existing parking area. The Board finds that the existing grade change and other vegetation located between the edge of the parking lot and the Interstate are sufficient to provide the screening required by the above standard. 2. In all parking areas containing twenty-eight (28) or more contiguous parking spaces and/or in parking lots with more than a single circulation lane, at least ten percent (10%) of the #SP-24-34 8 interior of the parking lot shall be landscaped islands planted with trees, shrubs and other plants. Such requirement shall not apply to structured parking or below-ground parking. The applicant is proposing to reduce the number of parking spaces in the existing lot. The Board finds there to be insufficient nexus to require evaluation of whether this criterion is met. 3. All interior and perimeter planting shall be protected by curbing unless specifically designed as a collection and treatment area for management of stormwater runoff as per 13.04(B)(5)(c) below. Interior planted islands shall have a minimum dimension of six (6) feet on any one side, and shall have a minimum square footage of sixty (60) square feet. Large islands are encouraged. There are no interior parking islands required or proposed. The altered portion of the exiting parking area is proposed to be curbed at the conclusion of this project. The Board finds this criterion met. 4. Landscaping Requirements. a. Landscaping shall include a variety of trees, shrubs, grasses and ground covers. All planting shall be species hardy for the region and, if located in areas receiving road runoff or salt spray, shall be salt-tolerant. As noted above, the applicant is not proposing any new or additional perimeter landscaping next to the altered portion of the existing parking area. b. At least one (1) major deciduous shade tree shall be provided within or near the perimeter of each parking area, for every five (5) parking spaces. The trees shall be placed evenly throughout the parking lot to provide shade and reduce glare. Trees shall be placed a minimum of thirty (30) feet apart. The applicant is proposing to stripe twelve new parking spaces. As per the above standard, the addition of twelve parking spaces requires the installation of three major deciduous shade trees. The Board finds that the applicant shall/shall not be required to plant three deciduous shade trees of a specified species along the eastern perimeter of the altered portion of the existing parking lot. c. Trees shall have a caliper equal to or greater than two and one-half (2 ½) inches when measured on the tree stem, six (6) inches above the root ball. As noted above, the Board finds that the applicant shall/shall not be required to plant three deciduous shade trees of a specified species along the eastern perimeter of the altered portion of the existing parking lot. The Board further finds that all three of these trees shall have a caliper of at least 2.5” dbh upon installation. d. Where more than ten (10) trees are installed, a mix of species is encouraged; the species should be grouped or located in a manner that reinforces the design and layout of the parking lot and the site. This criterion does not apply. e. Within the City Center FBC District, landscaping required within this section shall not count towards meeting minimum landscape budget requirements as detailed in Section 13.04(G). This project is not in the City Center FBC District – as such, this criterion does not apply. 5. Planting Islands. #SP-24-34 9 No planting islands are proposed or required as part of the proposed project. 6. Solar Canopies. No solar canopies are proposed or required as part of the proposed project. 7. Snow storage areas must be specified and located in an area that minimizes the potential for erosion and contaminated runoff into any adjacent or nearby surface waters. The applicant has indicated the existing snow storage areas on the plans. These areas are not proposed to be altered as part of this application. C. Screening or Buffering. The Development Review Board will require landscaping, fencing, land shaping and/or screening along property boundaries (lot lines) whenever it determines that a) two adjacent sites are dissimilar and should be screened or buffered from each other, or b) a property’s appearance should be improved, which property is covered excessively with pavement or structures or is otherwise insufficiently landscaped, or c) a commercial, industrial, and multi-family use abuts a residential district or institutional use, or (d) a parking or loading area is adjacent to or visible from a public street. Given the existing grade change and other vegetation located between the edge of the parking lot and the Interstate, the Board finds that the applicant is not required to provide landscaping or fencing at the perimeter of the altered portion of the parking area. D. Front Yards of Non-Residential and Multi-Family Uses. This criterion is not applicable. E. Site Restoration. The Board finds that the applicant must re-seed the disturbed area prior to issuance of a Certificate of Occupancy. F. Landscaping Plan. Although the applicant is required to install three trees at the edge of the newly striped portion of the parking area, the applicant is not required to provide a formal landscaping plan. G. Landscaping Standards. As noted above, this project does not require any landscaping or a landscaping plan. The applicant is still permitted to install trees outside the scope of a formal or mandatory landscaping plan. 13.03 Bicycle Parking & Storage Table 13-3 only identifies short-term and long-term bike parking requirements for buildings and uses conducted within buildings. The applicant is not proposing any new buildings or any alterations to existing buildings. As such, this criterion is not applicable. 13.07 Exterior Lighting The applicant has testified that no new or revised exterior light fixtures are proposed as part of this application. #SP-24-34 10 DECISION Motioned by xxxxx, seconded by xxxxx, to approve site plan application #SP-24-34 of AAM Catamount Woods, LLC, subject to the following conditions: 1. All previous approvals and stipulations shall remain in full effect except as amended herein. 2. This project shall be completed as shown on the plan submitted by the applicant and on file in the South Burlington Department of Planning and Zoning as conditioned herein. 3. The plans must be revised to show the changes below and shall require approval of the Administrative Officer. a. Include three deciduous shade trees of a specified species with a caliper of at least 2.5” dbh along the eastern perimeter of the altered portion of the existing parking lot. 4. A digital PDF version of the approved final plan set must be delivered to the Administrative Officer before issuance of a zoning permit. 5. The applicant must regularly maintain all stormwater treatment and conveyance infrastructure. 6. All exterior lighting must be installed or shielded in such a manner as to conceal light sources and reflector surfaces from view beyond the perimeter of the area to be illuminated. 7. The applicant must obtain a zoning permit within six (6) months from the date of this decision or this approval expires and is null and void. The applicant may submit a request for an extension to obtain a zoning permit under the terms outlined in Section 17.04 of the LDR’s, but the request must be submitted prior to the expiration of this approval. 8. The applicant must continue to maintain the approved landscaping in a vigorous growing condition throughout the duration of the use. 9. The applicant must re-seed the disturbed area prior to issuance of a Certificate of Occupancy. 10. Pursuant to Section 15.13(E) of the Land Development Regulations, any new utility lines, services, and service modifications must be underground. 11. The proposed project must adhere to standards for erosion control as set forth in Section 16.03 of the South Burlington Land Development Regulations. In addition, the grading plan must meet the standards set forth in Section 16.04 of the South Burlington Land Development Regulations. 12. The applicant must obtain a Certificate of Occupancy from the Administrative Officer prior to use of the new uses. 13. Any change to the site plan shall require approval by the South Burlington Development Review Board or the Administrative Officer as allowed by the Land Development Regulations. Jody Lesko Yea Nay Abstain Not Present Mark Behr Yea Nay Abstain Not Present Frank Kochman Yea Nay Abstain Not Present Quin Mann Yea Nay Abstain Not Present Dawn Philibert Yea Nay Abstain Not Present John Moscatelli Yea Nay Abstain Not Present #SP-24-34 11 Charles Johnston Yea Nay Abstain Not Present Motion carried by a vote of 0 - 0 - 0. Signed this ____ day of September, 2024, by _____________________________________ Dawn Philibert, Chair Please note: An appeal of this decision may be taken by filing, within 30 days of the date of this decision, a notice of appeal and the required fee by certified mail to the Superior Court, Environmental Division. See V.R.E.C.P. 5(b). A copy of the notice of appeal must also be mailed to the City of South Burlington Planning and Zoning Department at 575 Dorset Street, South Burlington, VT 05403. See V.R.E.C.P. 5(b) (4)(A). Please contact the Environmental Division at 802- 828-1660 or http://vermontjudiciary.org/GTC/environmental/default.aspx for more information on filing requirements, deadlines, fees and mailing address. The applicant or permittee retains the obligation to identify, apply for, and obtain relevant state permits for this project. Call 802.477.2241 to speak with the regional Permit Specialist. Memo   164 Main Street, Suite 201 | Colchester, Vermont | P: (802) 878-0375 | email@krebsandlansing.com   Date:  08/02/2024  To:   Marla Keene   From:  Derick Read, PE  Re:  DoubleTree Hotel Stormwater Improvements – Natural Resource Impacts    Article 12 Natural Resources   Article 12 of the South Burlington Land Development Regulations aims to meet the City’s Comprehensive Plan’s  goal of “emphasizing sustainability for long‐term viability of a clean and green South Burlington” and  objective to “promote conservation of identified important natural areas, open spaces, aquatic resources,  air quality, arable land and other agricultural resources, historic sites and structures, and recreational  assets”.    The stormwater improvements proposed with the DoubleTree Hotel’s stormwater improvements includes  encroachments into two hazards (Class II wetland buffer and Very Steep slopes) and one Level 1 Resource, that  includes the mapped Habitat Block.  All these encroachments are within the limits of the existing stormwater  pond that’s being expanded and converted into a gravel wetland, ultimately to improve water quality.  The  underlying reason for these impacts is at the basis of the Comprehensive Plan, which is to “emphasizing  sustainability for long‐term viability of a clean and green South Burlington”.  Below is a brief explanation of how  the impacted Natural Resources will not be adversely affected by the proposed project.    Wetland Buffer    Wetlands were delineated by Arrowwood Environmental in October 2022 with additional review and  delineation in June 2024.  At the time of the delineation in June 2024 we presented the project to Tina Heath,  the Wetland District Ecologist.  We explained that the project disturbance that’s located within the wetland  buffer is within the footprint of the existing stormwater treatment pond which was permitted under RDA 6284‐ 9030.  Tina indicated that the project qualifies as an Allowed Use und VWR 6.12 since the modifications are  within the existing footprint.  Given this State determination the project impacts will not adversely affect the  wetland resource.    Very Steep Slopes    Krebs & Lansing completed a topographic survey of the existing stormwater pond and outlined the impacted  areas with slopes greater than 25% (5,320 s.f.).  The project needs to expand to the west in order to provide the  necessary volume to retrofit the treatment pond into a gravel wetland, which is a higher tier practice.  This  higher tier means that a greater level of water quality treatment is being provided which will help to protect the  Centennial Brook receiving waters.  The sideslopes of the existing pond are stable in the current condition and as  such, the soil is of a quality which can, and will be, stabilized again after construction.  We feel these minimal    PAGE [ 2 ]  impacts for the construction of the gravel wetland will be managed during construction and the result of the  project will benefit the water quality of Centennial Brook.    Habitat Block    The South Burlington Habitat Block was inserted into the project base drawing and shows an encroachment into  the northern limits of the proposed improvements.  We recognize that this site is adjacent to the Centennial  Woods Natural Area but feel that the existing stormwater fence around the pond creates a barrier for wildlife  habitat.  This obstruction, coupled with the close proximity of the large parking lot, does not feel like it belongs  within the “realistic” limit of a wildlife habitat block.  After the project construction is complete the safety fence  barrier will be restored and the area will return to its use as a stormwater treatment practice.  We don’t believe  the minimal impacts to the mapped habitat block will adversely affect the resource.  ^ ^ ^ ^^ o o o o o o o o ^ ^ ^ X X X X X ^^ ^ ^X X X X X X XXX XX X XXX X X X X X X X X X X X X X X XXX X X X X XX X X X X X XX X XXXXXXXXXX X X X X X X X X X X X X X X X X X X X X X X XXXXXXXX XXXXX X X X X X X X X X X X X XXXXX X X XXX X X o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o P A T C H E N R O A D VALLEY R I D G E R D IN T E R S T A T E 8 9 IN T E R S T A T E 8 9 o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o ^ o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o IN T E R S T A T E 8 9 IN T E R S T A T E 8 9 o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o X X X X X X X X X X X FP FP SAT.DISH SAT.DISH SAT.DISH SAT.DISH SAT.DISH 304.2 302.3 303.1 301.9 299.8 302.2 303.6 290.0 287.7 320.0 310.0 302.3 302.7 301.3 300.4 297.9 290.4 297.9 287.2 289.1 312.1 305.4 314.5 281.9 296.6 293.6 292.0290.0 282.2 280.1 277.2 291.9 289.9277.3 289.5 290.8 292.0 279.0 293.8 291.9 276.0 291.7 284.2 281.4 291.7 284.0 283.4 289.8 287.7 280.3 280.2 296.7 289.2 301.5 304.5 300.2 292.0 292.9 301.6 299.5 294.1 282.7 286.5 295.9 291.7 289.7 274.8 301.6 299.7 289.0 293.5286.0 282.9 290.5 289.5 300.6 298.8 296.9 261.4 268.6 265.6 261.0 263.6 260.8302.8 308.4 304.5 313.7 305.0 CFC - BASEBALL CONCESSIONS0972 LAKE MONSTERS ^ ^ ^ ^^X XXXXXXXXXX X X X X X X X X X X X X X X X X X X X XXXXXXXX XXXXX X X X X X X302.8 308.4 313.7 305.0 CFC - BASEBALL CONCESSIONS0972 LAKE MONSTERS 287 COLCHESTER AVE CFC MAINTENANCE BARNCENTENNIAL FIELD0971 > C A T A M O U N T D R I V E ^ X X X X X X X X X o o o o o o o o X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X XX XXX X X o o o o o o o o o o o o o o o o o o o o o o o o INT E R S T A T E 8 9 Exit 1 4 O f f R a m p X X X X X X XXXX CATAMOUNT DRIV E CE N T E N N I A L C O U R T ( P r i v a t e l y O w n e d ) FAHC HELICOPTER LANDING PAD (PRIVATE)FACULTY AND STAFF APARTMENTSCENTENNIAL COURT EA S T A V E CA R R I G A N D R I V E M A I N 256 260 FAHC HELICOPTER LANDING PAD M A I N S T WI L L I S T O N R O A D SPE A R S T EA S T A V E ANTENNA 393.2 387.2 392.4 386.2 386.2 374.0 377.2 376.8 368.1 367.4 366.7 370.4 384.3 368.4 358.1 350.3 348.2 352.7 352.7 346.0 346.0 362.3 350.4 360.5 364.4 360.7 354.0 348.6 370.1 370.1 370.1367.9 364.3 364.4 367.9 344.2 345.7 346.0 375.6 376.4 375.6 370.2 370.2 373.1 373.1 349.9 350.8 349.5 T G C 284 EAST AVE 0001 IMF280 EAST AVE0198 LIBRARY RESEARCH ANNEX282 EAST AVE0199 RESCUE FACILITY60 EAST AVE0197 Ins t i t u t i o n a l & A g r i c u l t u r a l - N o r t h D i s t r i c t Co m m e r c i a l 1 - R e s i d e n t i a l 1 2 D i s t r i c t Inte r s t a t e H i g h w a y O v e r l a y D i s t r i c t Int e r s t a t e H i g h w a y O v e r l a y D i s t r i c t Tra f f i c O v e r l a y D i s t r i c t - Z o n e 1 Tr a n s i t O v e r l a y D i s t r i c t ^^ ^ ^ ^ X X X X X X X X X X X X X XXXXX ^^ X X X X ^^^^^^ ^ ^ X X X X X X X X X X X X X X X X X XXX XXX X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X XXXXXXXXXXXX X X XXXXXXX X X X X X X X X BILODEAU COURT BIL O D E A U P A R K W A Y BIL O D E A U P A R K W A Y BILODEAU COURT EAS T A V E CASE PARKWAY CASE PARKWAY 27 58 64 66 67 61 55 47 43 35 EA S T A V E 82 76 72 88 94 102 16 4 BILODEAU PARKWAY 140 145 ^ X ^^^ ^^^^^^^^^^ ^ X ^^^ ^ ^ ^ ^ ^ ^ XXX X X X X X ^ ^^ X X X ^ ^ ^ X X X X X ^ ^X X X XXX X X X X X X X X X X X XX X X X X X X X X X X X ^ ^ ^ ^ ^ ^ ^ ^ ^^^ ^ ^ ^ ^ MAR Y F L E T C H E R D R I V E CE N T E N N I A L C O U R T ( P r i v a t e l y O w n e d ) CEN T E N N I A L C O U R T ( P r i v a t e l y O w n e d ) CENTENNIAL COURT (Privately Owned) (PRIVATE)FACULTY AND STAFF APARTMENTSCENTENNIAL COURT MARY FLE T C H E R D R I V E EAS T A V E 150 165 175 155 145 EA S T A V E 27 225 224 230 206 202 198 192 166 154 217 205 201 195 183 202 ^ X X X X X X X 19 120 130 38 34 28 22 14 50 44 606064 70 74 75 69 59 55 47 31 37 45 4135 33 27 X X X X X X X X X X XXX X X X X ^ VV V V ANTENNA ANTENNA SAT.DISH SAT.DISHSAT.DISH SAT.DISH SAT.DISH SAT.DISH 385.1 324.5 332.4 330.4 325.1 325.2 326.6 334.6 329.4 380.9 371.1 380.5 352.5 348.5 347.0 351.1 338.6 348.1 347.1 344.6 349.3 336.6 349.8 349.1 341.5341.5 334.4 339.3 339.3 340.8 339.7 339.4 326.6 333.2 342.3340.8 341.2 335.8 342.5 343.2 341.6 343.5 330.9 341.6 338.9 331.9335.7 323.2 343.1 341.6 330.4 342.1 342.3 340.2 333.7 329.1 342.2 341.5 341.5 334.7 326.6 339.6 342.6 335.1 339.8 332.8 329.8 330.5 341.9 330.7 344.4 339.7 336.2 342.0343.4 341.8343.5 329.6 332.6 324.3 355.9 347.7 350.1 345.1346.7 334.1 352.4 348.7 342.7 336.5 355.1 361.3 356.1356.0 356.0 366.0364.9 359.3 352.6 374.4373.1 360.1 366.4 356.4 364.8 353.0 355.5 361.7 360.6 352.4 342.3 340.4 335.2 341.6 348.6 334.0 336.6 347.3 335.8 344.3 331.8 332.6 338.3 341.4 338.5 338.4 333.5 338.5 338.3 335.7 337.8 337.8 342.2 333.0 329.7 332.2 341.9 331.3 332.2 342.1 331.1 328.9 336.5 340.9 334.0 344.3 331.1 349.1348.6 337.7 345.9341.0 348.5 362.5 360.0 362.2 360.0 349.2 362.1 360.9344.5 353.7 351.4 352.4 352.4352.4 341.9 336.2 330.4 340.7 361.9 356.6 344.6 348.0358.7355.0 356.5340.6 352.6 349.1 344.5340.9 349.1 347.7 347.7 331.8 334.4 331.7 323.8 323.9 385.0 393.2 392.1 392.1 392.1 392.2 394.7 398.1 381.8 376.5 383.9 381.1 387.1 384.6 385.0 348.1 348.2 338.3 339.0338.8 338.6367.2 377.6 382.2 367.5 357.4 354.0356.2 355.7 355.2 352.9 386.9 370.1 369.2 379.0364.6 370.2 366.6384.2 368.1 370.2 384.2 380.5 374.9 366.2 343.0 345.9 339.6 337.4 330.1 331.1 332.5 344.1 332.7 341.8 340.8 337.3 338.4 331.7 393.1 385.2 385.2 390.0 376.3 377.3 379.0 383.5 382.4 387.4385.6 380.1 387.4 386.9 386.3 384.5 377.4 385.3 387.5 383.4 369.8 369.8 369.9 383.6368.5 383.8 379.8 379.8 370.4 387.0371.6 377.4 368.6 377.3 380.9 371.0 375.3 364.5 387.7 383.1 370.4 369.7 369.8 377.2 361.4 346.3 347.3 348.7 349.9351.6 352.8 342.8 341.5 340.3 338.8 337.7 357.1358.2 359.7 361.2 362.5 352.7 352.9 351.3 350.1 348.7 347.0 353.1 352.2 352.4 351.6 347.3 346.2 347.3 346.5 348.7 369.1 369.3363.6 363.8 364.1 363.6 342.9 342.9 367.7 368.0 368.4365.6 363.0 363.0 365.2 342.1 342.1 342.9 366.8 367.2 361.4 361.4 361.5 361.5 341.5 341.3 341.6 340.7 340.5 365.9 365.9 361.2361.2 360.7360.7 367.3 366.7369.7 369.6 344.3 341.5 345.7 345.2 365.5 365.5 366.2 366.2 370.8 370.9 372.2 371.4 365.9 365.9 366.1 366.1 347.4 346.0 348.2 370.2 370.2 367.0 367.0 372.7 373.5 373.0 347.7 400.4 406.9 458.0 446.8 X X X X ^^^^^^ ^ ^ X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X XXXXXXXXXXXX X X XXXXXXX X X X X X X X X CASE PARKWAY 58 64 66 67 61 55 47 EA S T A V E 82 76 72 88 94 102 16 4 SAT.DISH 324.5 332.4 330.4 325.1 325.2 326.6 334.6 329.4 333.5 338.5 338.3 335.7 337.8 337.8 342.2 333.0 329.7 332.2 341.9 331.3 332.2 342.1 331.1 328.9 336.5 340.9 334.0 344.3 331.1 349.1348.6 337.7 345.9341.0 348.5 362.5 360.0 362.2 360.0 349.2 362.1 360.9344.5 353.7 351.4 352.4 352.4352.4 341.9 336.2 330.4 340.7 361.9 356.6 344.6 348.0358.7355.0 356.5340.6 352.6 349.1 344.5340.9 349.1 347.7 347.7 331.8 334.4 331.7 323.8 323.9CENTRAL UTILITY PLANT (CUP) RADIATION ONCOLOGY COOLING TOWERS CFC GROUNDS GAR/PUMPCENTENNIAL FIELD0960 CFC GROUNDS BLDG50 UNIVERSITY RD0962 CFC MAINTENANCE FACILITY40 UNIVERSITY RD0963 CFC GROUNDS GARAGECENTENNIAL FIELD0961 HYD 31 23 1 1 314313312311 310 315 31 3 x 30 5 . 0 ' 303302 304 306 307308 309311312 313310 305 305314313 312311 309 308 307 306 304303 310 305313 312308 306 304 303 x 3 0 3 . 7 305304 304 306 306305305 33 8 NewTrans foreba y 338 338 333 330 332329 333334 333 331330332 Heat P u m p / Cond e n s e r P a d 33 7 33 6 338 337 336 310 MECH B B B B B B 31 0 315 M 329 330 3 3 1 3 3 0 3 2 9 33 0 339 33 7 33 7 336 335 334 333 310 305 313 312 308 306 304 303 x 3 0 3 . 7 305 304 304 UD UD B B B B B ST ISSUED: STATUS: SCALE: COPYRIGHT © SMITH BUCKLEY ARCHITECTS PLLC ALL RIGHTS RESERVED REQUEST CLARIFICATIONS AT ONCE IF THE MEANING IS UNCLEAR OR DISCREPANCIES APPEAR IN THESE DRAWINGS. FIELD CHECK ALL DIMENSIONS PRIOR TO CONSTRUCTION C-100 OVERALL SITE PLAN Do u b l e T r e e P a r k i n g an d S t o r m w a t e r Im p r o v e m e n t s 87 0 W i l l i s t o n R o a d So u t h B u r l i n g t o n , V e r m o n t 1" = 150' SMITH BUCKLEY ARCHITECTS P 802 540 0323 www.SBAVT.com 431 PINE STREET SUITE 210 BURLINGTON VT 05401 CIVIL ENGINEER 164 Main Street, Suite 201 Colchester, Vermont 05446 (802) 878-0375 www.krebsandlansing.com KREBS & LANSING CONSULTING ENGINEERS REV REV DATEDESCRIPTION 08/02/24 Permit Review Approximate project limits. See Sheet C-101 for enlarged site plan Limits of Centennial Woods Natural Area 150' Right of Way (N/F) Vermont Transco LLC 75' Right of Way (N/F) Vermont Transco LLC 75' Right of Way (N/F) Vermont Transco LLCMapped Habitat Block impact (2,430 s.f.) within limits of existing stormwater treatment pond NATURAL RESOURCE ENCROACHMENTS See Inset on this plan PROJECT INFORMATION Property Owner:University of Vermont Zoning:C1-R12 & IA NORTH Habitat Block and Wildlife Corridor Limit LAND USE LEGEND Special Flood Hazard Area River Corridor Limit Very Steep Slope (>25%) Class II Wetland Class II - 50 ft Wetland Buffer Existing Easement/Right of Way East Pond Main Street Pond University of Vermont & State Agricultural College Zoning Districts Proposed Habitat Block Offset Area (2,430 s.f.) Proposed Habitat Block Offset Area 1 08/13/2024Natural Resource Revisions Proposed modified Habitat Block boundary Proposed modified Habitat Block boundary > > > > > > > 328. 0 0 x ISSUED: STATUS: SCALE: COPYRIGHT © SMITH BUCKLEY ARCHITECTS PLLC ALL RIGHTS RESERVED REQUEST CLARIFICATIONS AT ONCE IF THE MEANING IS UNCLEAR OR DISCREPANCIES APPEAR IN THESE DRAWINGS. FIELD CHECK ALL DIMENSIONS PRIOR TO CONSTRUCTION C-200 EXISTING CONDITION PLAN Do u b l e T r e e P a r k i n g an d S t o r m w a t e r Im p r o v e m e n t s 87 0 W i l l i s t o n R o a d So u t h B u r l i n g t o n , V e r m o n t 1" = 20' SMITH BUCKLEY ARCHITECTS P 802 540 0323 www.SBAVT.com 431 PINE STREET SUITE 210 BURLINGTON VT 05401 CIVIL ENGINEER 164 Main Street, Suite 201 Colchester, Vermont 05446 (802) 878-0375 www.krebsandlansing.com KREBS & LANSING CONSULTING ENGINEERS GRAVEL WETLAND #1 REV REV DATEDESCRIPTION 08/02/24 Permit Review Se e I n s e t A b e l o w INSET A > > > > > > > 18" A D S 31 2 3 1 1 314 313 312 311 31 0 315 31 3 x 30 5 . 0 ' 303302 304 306 307 308 309 311 312 313 310 305 305 314 313 312 311 309 308 307 306 304 303 310 305 313 312 308 306 304 303 x 3 0 3 . 7 305 304 304 306 306 305 305 Gravel Wetland Cell #1 Ground Elevation 303.0 WSE 302.7 Forebay 310 24" Vertical Inlet Pipes. See details. UD UD Gravel Wetland Cell #2 Ground Elevation 303.0 WSE 302.7 Install 39' of 6" perf. PVC pipe with cleanouts on each end. 6" solid PVC pipe Stable vegetated path for gravel wetland access. Line bottom of forebay with 6" crushed gravel See forebay weir Cross Section Detail. 4:1 sideslopes to elevation 308.0' 24" Vertical Inlet Pipes. See details. UD UD Install 39' of 6" perf. PVC pipe with cleanout. Remove existing outlet structure New 6" PVC New Outlet Structure DMH #1. See Details New 6" co Maintain existing spillway Connect new 24" PVC SDR 35 pipe to existing B B B B B B 310 315 U D U D Connect 24" pipes with 6" perf pipe installed at bottom of stone ST CB H10 Rim 315.4 Inv. in 306.10 Inv. out 306.00 ES inv. 305.0 Sawcut pavement CB H8 Rim 311.50 Inv. out 308.00 ST ST ST ST ST ST Tie-in new curb to existing New paved parking lot in footprint of demolished hotel wing 2.5:1 sideslopes above elevation 308.0' 18" ADS 4' high black vinyl coated chain link fence CB H9 Rim 313.80 Inv. in 307.6 (18" W) Inv. in 307.55 (15"N) Inv. out 307.45 (18" S) CB H7 Rim 315.7 Inv in 308.5 (18" Ex) Inv. out 308.40 (18" E) ST ST ST 15 " A D S New curb to direct runoff to the gravel wetland Restore to vegetation 328. 0 0 x 12" AD S CB H11 Rim 328.00 Inv. out 323.00 (No Sump) Remove 6" storm pipe and expand existing penetration for new 12" ADS pipe. Insert pipe (Inv. 317.3±) and concrete encase penetration. See Detail Install vertical bends on storm pipe as necessary to fit pipes into storm structure penetrations. Remove and dispose of existing storm structure and pipe Remove and dispose of existing storm structure and pipes 6' transition to flush curb Stone dissipater pad at edge of pavement 10' wide double gate for stormwater system access New concrete curb 12 Parallel Parking Spaces 312 Begin new curb New curb to direct runoff to the gravel wetland ISSUED: STATUS: SCALE: COPYRIGHT © SMITH BUCKLEY ARCHITECTS PLLC ALL RIGHTS RESERVED REQUEST CLARIFICATIONS AT ONCE IF THE MEANING IS UNCLEAR OR DISCREPANCIES APPEAR IN THESE DRAWINGS. FIELD CHECK ALL DIMENSIONS PRIOR TO CONSTRUCTION C-101 SITE PLAN GRAVEL WETLAND & STORM COLLECTION Do u b l e T r e e P a r k i n g an d S t o r m w a t e r Im p r o v e m e n t s 87 0 W i l l i s t o n R o a d So u t h B u r l i n g t o n , V e r m o n t 1" = 20' SMITH BUCKLEY ARCHITECTS P 802 540 0323 www.SBAVT.com 431 PINE STREET SUITE 210 BURLINGTON VT 05401 CIVIL ENGINEER 164 Main Street, Suite 201 Colchester, Vermont 05446 (802) 878-0375 www.krebsandlansing.com KREBS & LANSING CONSULTING ENGINEERS GRAVEL WETLAND #1 Topsoil, seed, and stabilize sideslopes wtih rolled erosion matting Topsoil, seed, and stabilize sideslopes wtih rolled erosion matting Install boulders along wetland buffer prior to beginning construction REV REV DATEDESCRIPTION 08/02/24 Permit Review Se e I n s e t A b e l o w INSET A Prope r t y L i n e 1 08/13/2024Natural Resource Revisions > > > > > > > 31 2 3 1 1 314 313 312 311 31 0 315 31 3 x 30 5 . 0 ' 303302 304 306 307 308 309 311 312 313 310 305 305 314 313 312 311 309 308 307 306 304 303 310 305 313 312 308 306 304 303 x 3 0 3 . 7 305 304 304 306 306 305 305 310 UD UD UD UD B B B B B B 310 315 U D UD ST ST ST ST ST ST ST ST ST ST Begin new curb New curb to direct runoff to the gravel wetland ISSUED: STATUS: SCALE: COPYRIGHT © SMITH BUCKLEY ARCHITECTS PLLC ALL RIGHTS RESERVED REQUEST CLARIFICATIONS AT ONCE IF THE MEANING IS UNCLEAR OR DISCREPANCIES APPEAR IN THESE DRAWINGS. FIELD CHECK ALL DIMENSIONS PRIOR TO CONSTRUCTION C-300 1" = 20' EROSION PREVENTION & SEDIMENT CONTROL PLAN CIVIL ENGINEER 164 Main Street, Suite 201 Colchester, Vermont 05446 (802) 878-0375 www.krebsandlansing.com KREBS & LANSING CONSULTING ENGINEERS SMITH BUCKLEY ARCHITECTS P 802 540 0323 www.SBAVT.com 431 PINE STREET SUITE 210 BURLINGTON VT 05401 After topsoil and seeding, stabilize sideslopes with rolled erosion fabric. Stabilize sideslopes with rolled erosion fabric. Install and properly key-in silt fence or straw wattles or shallow stable swale at top of slope along edge of pavement to direct runoff away from excavation Install crushed stone stable discharge area REV REV DATEDESCRIPTION Install and maintain straw wattles or approved equal, around catch basin inlet. Place Marsh Mat coir inlet filter over grate Install and maintain straw wattles or approved equal, around catch basin inlet. Place Marsh Mat coir inlet filter over grate Install and properly key-in silt fence or straw wattles prior to beginning new curb. Install orange construction limit tape on grade stakes Install construction limit barrier prior to beginning earthwork, typical SE E I N S E T B E L O W Do u b l e T r e e P a r k i n g an d S t o r m w a t e r Im p r o v e m e n t s 87 0 W i l l i s t o n R o a d So u t h B u r l i n g t o n , V e r m o n t 08/02/24 Permit Review Install and properly key-in silt fence or straw wattles prior to beginning new curb. Install orange construction limit tape on grade stakes INSET Possible dewatering site. Pump to Dirt Bag, or approved equal, sediment filter bag with downslope wattles Erosion Prevention and Sediment Control Notes ISSUED: STATUS: SCALE: COPYRIGHT © SMITH BUCKLEY ARCHITECTS PLLC ALL RIGHTS RESERVED REQUEST CLARIFICATIONS AT ONCE IF THE MEANING IS UNCLEAR OR DISCREPANCIES APPEAR IN THESE DRAWINGS. FIELD CHECK ALL DIMENSIONS PRIOR TO CONSTRUCTION CH400 CIVIL DETAILS N.T.S SMITH BUCKLEY ARCHITECTS P 802 540 0323 www.SBAVT.com 431 PINE STREET SUITE 210 BURLINGTON VT 05401 CIVIL ENGINEER 164 Main Street, Suite 201 Colchester, Vermont 05446 (802) 878-0375 www.krebsandlansing.com KREBS & LANSING CONSULTING ENGINEERS REV REV DATEDESCRIPTION Do u b l e T r e e P a r k i n g an d S t o r m w a t e r Im p r o v e m e n t s 87 0 W i l l i s t o n R o a d So u t h B u r l i n g t o n , V e r m o n t 08/02/24 Permit Review ISSUED: STATUS: SCALE: COPYRIGHT © SMITH BUCKLEY ARCHITECTS PLLC ALL RIGHTS RESERVED REQUEST CLARIFICATIONS AT ONCE IF THE MEANING IS UNCLEAR OR DISCREPANCIES APPEAR IN THESE DRAWINGS. FIELD CHECK ALL DIMENSIONS PRIOR TO CONSTRUCTION C-401 CIVIL DETAILS N.T.S SMITH BUCKLEY ARCHITECTS P 802 540 0323 www.SBAVT.com 431 PINE STREET SUITE 210 BURLINGTON VT 05401 CIVIL ENGINEER 164 Main Street, Suite 201 Colchester, Vermont 05446 (802) 878-0375 www.krebsandlansing.com KREBS & LANSING CONSULTING ENGINEERS REV REV DATEDESCRIPTION Do u b l e T r e e P a r k i n g an d S t o r m w a t e r Im p r o v e m e n t s 87 0 W i l l i s t o n R o a d So u t h B u r l i n g t o n , V e r m o n t 08/02/24 Permit Review Maintenance: The plant biomass should be harvested annually, and accumulated sediment removed at intervals of 5-10 years. These activities may disrupt the wetlands system and may require some vegetation re-establishment. The riser pipes may clog and will require annual clean-out (it should be done in the winter time when one can walk on the wetland). ·First Year Post-Construction: Inspection frequency should occur after every major storm in the first year following construction. o Inspect that the system drains within 24-48 hours. o The plants may need watering if necessary during the first growing season. Revegetate if the vegetation is poorly establishing. o Identify areas of erosion and make timely repairs. o Check all inlets, outlets and subdrains for proper functioning. Risers may need to be cleaned. ·Post-Construction: Inspection frequency should occur at least every 6 months and after every major storm. Activities are expected to include: o Check the basin for a dense root mat establishment of wetland vegetation. o Check and clean the risers if there is evidence of standing water, discolored water or accumulated sediments in the cells. o Check and clean the forebay for sediments, trash and debris. When sediments have accumulated to a depth of 12 inches, standing water is persistent or wetland vegetation become established, the forebay will need to be excavated and reformed. o Verify that the cells drain within 24-48 hours. Sediment will need to be removed when an accumulation of 4 inches is evident over the wetland surface. o Check and clean all outlets and overflow spillway if blocked or there is evidence of structural damage or erosion. o Remove decaying vegetation, litter and debris. o Check for foreign species. Particular care must be used to avoid the unintended introduction of invasive species such as purple loosestrife (Lythrum salicaria) and common reed (Phragmites australis). It is recommended that a qualified wetland biologist be consulted when these are found in the area of the gravel wetland. GRAVEL WETLAND MAINTENANCE NOTES: 12" ISSUED: STATUS: SCALE: COPYRIGHT © SMITH BUCKLEY ARCHITECTS PLLC ALL RIGHTS RESERVED REQUEST CLARIFICATIONS AT ONCE IF THE MEANING IS UNCLEAR OR DISCREPANCIES APPEAR IN THESE DRAWINGS. FIELD CHECK ALL DIMENSIONS PRIOR TO CONSTRUCTION C-402 CIVIL DETAILS N.T.S SMITH BUCKLEY ARCHITECTS P 802 540 0323 www.SBAVT.com 431 PINE STREET SUITE 210 BURLINGTON VT 05401 CIVIL ENGINEER 164 Main Street, Suite 201 Colchester, Vermont 05446 (802) 878-0375 www.krebsandlansing.com KREBS & LANSING CONSULTING ENGINEERS Gravel Wetland Soil shall conform to the "BIORETENTION AND GRAVEL WETLAND SOIL MEDIA TESTING GUIDANCE" document prepared by the University of Vermont, Sea Grant Lake Champlain, and Watershed Consulting The gravel wetland soil shall be tested in accordance with the Phosphorus Testing Procedure below: Phosphorus testing is required for the upper media layer of the gravel wetland soil. Final mixes must have a Phosphorus Saturation Ratio (PSR) less than or equal to 0.10 and shall be tested in accordance with the following protocol: 1.Samples are to be air dried and sieved through 2mm prior to testing. 2.Air-dried, sieved soil samples are to then be extracted with the Mehlich-3 solution (0.2 M CH3COOH + 0.25 M NH4NO3 + 0.015 M HNO3 + 0.001 M EDTA) by shaking a soil-solution suspension for 5 minutes at a 1:10 ratio (soil mass in grams: solution volume in mL), followed by filtering to remove particles (pore size of 2 um is recommeded, max pore size = 8 um). 3.Extracts from the Mehlich-3 procedure are to be analyzed for P, Fe, and Al by ICP-OES. 4.The Phosphorus Saturation Ratio (PSR) is calculated as follows: PSR = Mehlich-3 extractions follow the above protocol. Other soil extractions, or extractions used to quantify total elements, are NOT acceptable for this requirement. In cases where ingredient mixing has not yet occurred, ingredients can be mixed at the intended volumetric proportions in a small batch (at least one quart in volume) for testing purposes. If this small batch testing approach is taken, the final material to be used during installation must be retested to confirm acceptable PSR. Soil samples for P, Fe, and Al analysis via Mehlich-3 extraction can be submitted to the Agricultural and Environmental Testing Laboratory (AETL) located at UVM. Plan to allow 3-4 weeks for analysis. How to take a soil sample [go.uvm.edu/soil-sampling] Submitting a soil sample [go.uvm.edu/uvm-soil-lab] where, ·PM3 = Mehlich-3 P in mg P per kg dry soil ·FeM3 = Mehlich-3 Fe in mg Fe per kg dry soil ·AlM3 = Mehlich-3 Al in mg Al per kg dry soil REV REV DATEDESCRIPTION Do u b l e T r e e P a r k i n g an d S t o r m w a t e r Im p r o v e m e n t s 87 0 W i l l i s t o n R o a d So u t h B u r l i n g t o n , V e r m o n t 08/02/24 Permit Review 1.ALL AREA DISTURBED AND ALL AREAS WITHIN THE CLEARING LIMITS SHALL BE GRADED AND COVERED WITH A MINIMUM OF 4" OF LOAM TOPSOIL. THE AREAS TO BE LOAMED SHALL BE FREE AND CLEAR OF ROOTS, WASTE MATERIAL AND OTHER DELETERIOUS MATERIAL. TOPSOIL SHALL BE SPREAD AND LIGHTLY COMPACTED TO A DEPTH OF 4". TOPSOIL SHALL BE APPROVED BY THE ENGINEER. ALL SIDE SLOPES ARE TO BE LOAMED. 2.ALL TURF ESTABLISHMENT SHALL BE IN ACCORDANCE WITH SECTION 651 OF THE VT STANDARD SPECIFICATIONS 2018 AND THE TOWN'S SPECIFICATIONS. MULCHING SHALL FOLLOW SEEDING BY NO MORE THAN 24 HOURS. 3.ALL CUT SLOPES SHALL BE NO STEEPER THAN 2.0H ON 1.0V. ALL FILL SLOPES SHALL BE NO STEEPER THAN 2.0H ON 1.0V. 4.THE CONTRACTOR SHALL NOT DISTURB ANY GROUND BETWEEN OCTOBER 15TH BETWEEN APRIL 15TH WINTER MONTHS, UNLESS APPROVED BY THE ENGINEER. 5.TEMPORARY SILT FENCE SHALL BE ERECTED PRIOR TO ANY CLEARING OR CONSTRUCTION. FENCING MAY BE ERECTED IN PHASES, BUT IN NO CASE SHALL GROUND DISTURBANCE PROCEED FENCING. SPECIAL AREAS MAY BE DESIGNATED BY THE OWNER FOR PRESERVATION OF EXISTING TREES. THESE AREAS SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO INSURE NO DAMAGE IS DONE TO DESIGNATED TREES. 6.EXISTING PLANTINGS ARE LOCATED IN GENERAL AREAS AS SHOWN ON THIS PLAN. CONTRACTOR SHALL PROTECT PLANTINGS SO AS NOT TO DAMAGE THESE OR THEIR ROOT SYSTEMS. 7.SLOPE STABILITY BASED UPON UNSATURATED SOIL CONDITIONS. IF DURING CONSTRUCTION SATURATED SOILS ARE ENCOUNTERED, CONTACT THE ENGINEER IMMEDIATELY. GENERAL GRADING AND SITE WORK NOTES PERMANENT SEED MIX SHALL BE USED AS EARLY AS PRACTICABLE BETWEEN 5/15 AND 9/15 AND SHALL MEET THE FOLLOWING CRITERIA: SEED % WEIGHT CREEPING RED FESCUE 40% KENTUCKY BLUEGRASS 30% PERRENNIAL RYEGRASS 30% SEEDING SPECIFICATIONS Hydroseed Additives: Fertilizer: 19-19-19 75 lbs per 1,000 gallons of water Lime: 100 lbs. per 1,000 gallons of water Mulch: 300 lbs. per 1,000 gallons of water. Tacifer: 5 lbs. per 1,000 gallons of water. If hydroseeding is used for temporary stabilization measures for turf establishment. Specifications are: 1.Areas having soil compaction as a result of construction shall have any crushed stone removed and the subgrade shall be roto-tilled prior to placing topsoil. Refer to the Post Construction Soil Depth and Quality Requirements. 2.If hand seeding, only straw mulch is to be used and secured by netting either organic or inorganic. If inorganic is used, it must be removed before the first mowing. 3.Starter fertilizer shall be applied at the manufacturer's suggested rate at the time of seeding. Fertilizer application will not be allowed in sensitive areas and adjacent to drainage ways as determined by the Engineer. 4.Watering is to be done by the Contractor and is to last for the duration of the warranty period to maintain proper growth. All apparatus necessary to apply the water must be furnished by the Contractor (i.e. hoses, sprinklers, etc.). 5.Staking of all topsoiled areas to control foot traffic will be required. Unless otherwise specified, acceptable staking materials will be grade stakes and twine or string with flagging attached for visibility. 6.A guarantee through the first mowing is required with any sparse or bare areas larger than 1 sq. ft. to be redone. 7.The Contractor is responsible for the first mowing. After the first mowing and prior to the Owner taking responsibility for the lawn areas the Contractor and an Owner's Representative shall meet to inspect the vegetation establishment. 8.Contractor is responsible for all topsoil to complete the project as shown. If existing volume of topsoil is inadequate, the Contractor, at no cost to the Owner, shall purchase offsite approved topsoil as necessary. Refer to Post Construction Stabilization Plan for additional requirements ISSUED: STATUS: SCALE: COPYRIGHT © SMITH BUCKLEY ARCHITECTS PLLC ALL RIGHTS RESERVED REQUEST CLARIFICATIONS AT ONCE IF THE MEANING IS UNCLEAR OR DISCREPANCIES APPEAR IN THESE DRAWINGS. FIELD CHECK ALL DIMENSIONS PRIOR TO CONSTRUCTION C-403 CIVIL DETAILS N.T.S A A B B SMITH BUCKLEY ARCHITECTS P 802 540 0323 www.SBAVT.com 431 PINE STREET SUITE 210 BURLINGTON VT 05401 CIVIL ENGINEER 164 Main Street, Suite 201 Colchester, Vermont 05446 (802) 878-0375 www.krebsandlansing.com KREBS & LANSING CONSULTING ENGINEERS REV REV DATEDESCRIPTION 1 8-01-2024Permit Revisions Do u b l e T r e e P a r k i n g an d S t o r m w a t e r Im p r o v e m e n t s 87 0 W i l l i s t o n R o a d So u t h B u r l i n g t o n , V e r m o n t 08/02/24 Permit Review