HomeMy WebLinkAboutSD-22-04 - Supplemental - 0119 Tilley Drive (26)
M E M O R A N D U M
To: Marla Keene, City Planner
Development Review Board members
City of South Burlington, Department of Planning and Zoning
From: Gail Henderson-King, Senior Project Manager
Date: April 27, 2022
Re: University of Vermont Medical Center – Outpatient Surgery Center
Sketch Plan Application Additional Information for May 4th DRB Hearing
To follow up on the discussion at the DRB Sketch Plan hearing on April 5th for the University of
Vermont Medical Center (UVM Medical Center) Outpatient Surgery Center project, we have
prepared the following information in response to questions at the meeting and in the Staff
Report dated March 25, 2022.
Staff Report Comments
1. If the applicant wishes to conserve the remainder of the site as permanent open space,
Staff considers a master plan may not be required, otherwise a master plan should be required. Staff recommends the Board discuss with the applicant.
As discussed at the DRB hearing, no further development is planned for the site. The UVM
Medical Center agrees to conserve the northern portion of the site as permanent open space.
2. Staff recommends the Board discuss with the applicant locating the site access to the east
in order to eliminate natural resource impacts.
As discussed at the DRB hearing, having the site access to the east does not physically work.
The topography of the site combined with the existing 100 ft Green Mountain Power
easement, dictates the site layout. Since zoning requires parking to be behind or beside the
building, that necessarily means the parking must be on the northern portion of the site, north
UVM Medical Center – Outpatient Surgery Center
Memorandum: Sketch Plan Application Additional Information for May 4th DRB Hearing
April 27, 2022
2 | Page
of the 100 ft GMP easement, and the building must be south of the GMP easement close to
Tilley Drive. Patients arriving for surgery must have easy access the facility. This means
parking must be in close proximity and have gentle slopes to the front entrance of the
building. Due to the higher elevation of the northern portion of the site where the parking
must be located, this limits how far downslope the main floor of the building can be.
Due to the topography, the south and east sides of the building will be an entire floor level
too low to allow the necessary relationship between the parking and the patient entrance.
Thus, the entrance must be on the north or west side. Since zoning requires the entrance to
face the front or corner the north side does not work as it would turn the back of the building
to Tilley Drive. That results in the location of the entrance on the west side where it is at the
corner of the building and will be easily seen by arriving patients.
Here are some more details:
- Patient centric criteria is of utmost importance for the Outpatient Surgery.
- There needs to be an easily accessible drop off / pick up area for unloading and helping
patients in and out as needed especially if they are using a wheelchair.
- The building and entrance need to be easily seen and accessed from Tilley Drive for
patients to they know where to go.
- The building needs to be oriented to take advantage of natural daylight.
- There needs to be Americans with Disabilities Act (ADA) accessible walkways from the
parking area to the building.
- There needs to be a loading area that is separate from the entrance to the building and is
located away from the residential neighbors.
- MEP (mechanical, electrical, plumbing) equipment associated with the building is needed
in close proximity to the building: chillers, generator, fuel cell, oxygen farm.
In addition, there are site restrictions that had to be considered for the layout of the project.
- Easements: There is a 100’ Green Mountain Power ROW and 20’ Champlain Water
District easement that crosses the middle of the site. An extremely limited grade change
is allowed in these ROW and easement.
- Topography: The site slopes from northwest to southeast. There is an approximately 26’
grade change from west to east, and approximately 19’ grade change from north to south.
The site slopes from high point mid site both northeast and southeast with the lowest
grades along east side of property. The lowest part of the site is on the east side where
stormwater collection and treatment system need to be located.
UVM Medical Center – Outpatient Surgery Center
Memorandum: Sketch Plan Application Additional Information for May 4th DRB Hearing
April 27, 2022
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- Wetlands: There are two Class III wetlands on site. These wetlands have been delineated
and reviewed by Gilman & Briggs. They are isolated, are not connected to each other or
to another water source and have minimal functions and values.
- Ledge: Ledge exists throughout the site and is visible in the center of the site with
exposed pieces. There is substantial ledge under the proposed building location and
avoiding impacting it as much as possible is a high priority.
- Zoning: The building oriented towards the road, cannot be located on the northern side of
the site because parking required on side or rear of building. Setback requirements
include an increased buffer from residential zoning district to the west and north. Limited
Class III wetlands impacts are allowed. Must handle and treat stormwater on site.
All of these factors were carefully considered in locating the building where it is located. The
function of the building fits into and takes advantage of the topography of the site and meets
patient centric criteria. The building is two story building with main floor operating rooms.
The partial lower level is for sterilization, locker and changing rooms, materials handling and
storage, shipping, and receiving/loading dock. The patient entrance is aligned with the most
direct, level approach to building and visible from Tilley Drive. The building placed between
GMP and CWD easements / ROW, wetlands, and setbacks, and is positioned to minimize
wetland impacts, excavation, and existing ledge removal. The MEP equipment is located in
close proximity to the northeast side of building. The drop off area at the front entrance has a
canopy overhang for patients. Unlike the lower level, which is largely below ground with
limited natural light, the patient level is above grade maximizing natural light.
Flipping the building and entrance to occur on the eastern side of the site will not physically
work. With the site restrictions: wetlands and topography, patient access and parking would
not work. The parking lot would be significantly higher than the east entrance a floor level
lower. This would require, at best, a circuitous pedestrian route from parking to entrance to
achieve acceptable grades. It would also place the patient level largely below grade with little
natural light. The entrance would not be readily visible to patients arriving at the site.
Furthermore, there is not enough room to fit both the drop off area and stormwater ponds on
east side without moving the building west which would place the building in the wetlands,
which is not allowed under zoning. The service entrance and patient access would become
intertwined and problematic, and the loading dock would be on upper level near neighbors’
residences and at a high grade at west.
Based on this, it is not possible to have the access from the east due to the physical
limitations and the functional requirements the UVM Medical Center has for this Outpatient
Surgery Center.
UVM Medical Center – Outpatient Surgery Center
Memorandum: Sketch Plan Application Additional Information for May 4th DRB Hearing
April 27, 2022
4 | Page
3. Staff considers discussion of minimizing these impacts is necessary if the Board entertains
permitting a restricted infrastructure encroachment.
We reexamined the design of the driveway entrance to the site in relation to the Class III
wetlands impacts and provide the following information.
- The Existing Wetlands Plan sheet W-1.0 prepared by Krebs & Lansing shows the two
Class III wetlands located on the site. The wetlands were delineated by Gilman & Briggs
Environmental, Inc. in 2019. Wetland A has 3,966 sq. ft. and wetland B has 10,249 sq. ft.
on Lot 6.
- Gilman & Briggs Environmental, Inc. prepared a wetlands analysis report. The report
analyzes the wetland functions and values of these wetlands and concluded they have
minimal functions and values.
- We prepared a concept sketch titled Drive Design Original prepared by Krebs & Lansing
showing the proposed plan layout with the Wetland B impacts. The proposed driveway
bifurcates Wetland B in a manner which retains a wetland area to the west of the drive as
well as a wetland area between the drive and the building. This is proposed to be
enhanced with wetland conservation mix with plantings. The layout impacts
approximately 5,640 sq. ft.
- We prepared a concept sketch titled Drive Design Option #1 prepared by Krebs &
Lansing showing a revised driveway layout with the Wetland B impacts. This concept
sketch shows the driveway shifted to the east with a retaining wall and guard rail located
along the west side. This design option #1 impacts 1,590 sq. ft.
Below is a summary of the wetland impacts for each option.
Class III Wetlands Impacts - Lot 6
Total Sq. Ft.
on Lot 6
Proposed Sq. Ft. Impacts:
Original Design
Proposed Sq. Ft. Impacts:
Design Option #1
Wetland A 3,996 0 0
Wetland B 10,249 5,640 1,590
While the Drive Design Original sketch is preferred as it functions best for the proposed
Outpatient Surgery Center, the Drive Design Option #1 appears feasible. We still need the
South Burlington fire chief to review the plans and provide input.
UVM Medical Center – Outpatient Surgery Center
Memorandum: Sketch Plan Application Additional Information for May 4th DRB Hearing
April 27, 2022
5 | Page
4. The Board should direct the applicant to provide a wetland delineation on Lot 2 in the
location of the planned future roadway in order to determine if any part of the future
roadway must be accommodated on the subject property (again, in common ownership
with Lot 2) or if it may be permitted on Lot 2. Provision of roadways on the official map is
a requirement of LDR 15.A.11C and 15.A.14B. Whether the lands are developed or
conserved, sufficient space for the future roadway must be retained if the future roadway
cannot be accommodated on Lot 2.
Lot 2 is not part of this project nor is part the Sketch Plan application for the UVM Medical
Center Outpatient Surgery Center. The plan included on page 5 of the Staff Report for the
April 5, 2022 DRB meeting includes a wetland map that appears to be the same or similar to
what we know of regarding Lot 2.
Furthermore, the City already has a 100 ft easement for the future road connection. It was
included in a previous approval for Mountain View Business Park. When Pizzagalli
Properties received approval for the Tilley II Subdivision, the DRB requested a 100 foot
easement across Lots 1 and 2 and labeled as proposed future interstate off ramp. We have
attached documents provided by Pizzagalli Properties that includes their engineer’s response
to City comments regarding the Tilley II Subdivision permitting along with the official
subdivision plan that shows this requested and approved 100 foot easement. Our
understanding from Pizzagalli Properties is this is the only official reference to this easement.
Nonetheless, as stated at the April 5, 2022 DRB meeting, UVMMC is willing to work with
the City in the future to accommodate road connections to points A and/or B on the portion
of Lot 6 located north of the proposed parking.
5. The Board should direct the applicant to provide a 50 or 60-ft ROW on the subject
property (dimension to be determined based on development plan for the northern portion
of the parcel) from the O’Brien roadway to the planned north south roadway in a location
that is viable given the topography. If master plan is required, it should include the
roadway connection.
As stated at the April 5th DRB hearing, the UVM Medical Center is happy to work with the
City and O’Brien Eastview development on the location of a future roadway A connection
through the northern end of Lot 6. The exact location can be determined at a later date once it
is decided whether the City wants to make the connection and where it should be located.
UVM Medical Center – Outpatient Surgery Center
Memorandum: Sketch Plan Application Additional Information for May 4th DRB Hearing
April 27, 2022
6 | Page
6. Staff recommends the Board should direct the applicant to provide a driveway connection
from the site to the north-south official map roadway. Staff notes that if the site were
accessed via the east, this objective would be addressed.
The UVM Medical Center is overly concerned if they provide a driveway connection to the
future roadway B that vehicles from the residential neighborhoods and others will use it as a
cut through. In addition, having vehicles entering the site from future roadway B could
impact the entry to the Outpatient Surgery Center.
7. Further pursuant to access and circulation, Staff recommends the Board discuss with the
applicant what the general traffic patterns will be for the site. The applicant has provided a
loading dock. Does the applicant’s proposed site configuration minimize conflicts between
passenger vehicles, larger vehicles, and pedestrians?
The proposed layout and circulation of the site has been designed to avoid conflicts between
vehicles, pedestrians, and delivery vehicles. Patient access to the main floor of the building is
separate from the loading docks at lower level. The delivery area has been designed so trucks
will not access the parking lot. Deliveries are planned to predominantly occur before or after
operating hours. These deliveries mostly consist of loading supplies: clean and dirty linens,
etc.
8. Since this is a large number of new trips, and since the applicant may instead opt to use
site-specific studies to estimate trip generation, Staff recommends the Board invoke third-
party technical review of the applicant’s traffic study, including traffic safety, at this time
to enable it to be fully reviewed prior to the site plan hearing.
The UVM Medical Center has retained a traffic engineer who is preparing a traffic study for
the project. We will provide the traffic study as part of the site plan application and
understand a third party technical review will be required.
9. Staff recommends the Board discuss with the applicant what a setback and buffer
containing a recreational path might look like were it designed in a way to meet the
applicable regulations.
We considered the option of a recreational path in the setback and buffer area to the west of
the parking area. However, several issues came to light regarding grading and stormwater
runoff in addition to the neighbors having concerns about a recreation path too close to their
properties.
UVM Medical Center – Outpatient Surgery Center
Memorandum: Sketch Plan Application Additional Information for May 4th DRB Hearing
April 27, 2022
7 | Page
The UVM Medical Center will commit to working cooperatively with neighbors and City as
to where a recreation path could be located. However, it is important to not hold up this
project while a location and design is worked out.
10. Staff recommends the Board discuss with the applicant what placement and screening
would be considered adequate for the proposed equipment.
We will provide appropriate landscape screening for the proposed MEP equipment along the
eastern property line to include evergreen trees.
11. Staff recommends the Board direct the applicant to include a front or corner-facing entry,
as the existing standards support this configuration, standards likely to be in effect at the
time of application will state this more strongly, and the site configuration supports this
layout.
The proposed main patient entry of the building is corner facing, located as close to the
southwest corner of the building as it can be. Moving it any further south would make the
grade from Tilley Drive to the entry too steep. The south facing portion of the entrance has
considerable glass helping address the street and allowing patients and visitors to see it
clearly from a distance. On the north side of the canopy is the exit door for patients following
surgery.
The driveway leading to the main entry with the canopy extension allows patients to be
dropped off and the driver to continue to the parking area. Patients can easily access the
handicapped and patient parking. This layout meets the patient centric design criteria that the
UVM Medical Center uses for its facilities.
We looked at keeping the entry vestibule in its present location but moving the door from the
west side to the south side of the vestibule. A concept sketch titled Partial Site Plan with
south Entry Option shows this layout. The canopy would need to be extended with the front
entry shifted to the south façade. It would involve the reduction of several handicapped
parking spaces which are critical to have at the entry. There would be circulation and cuing
issues at the drop off as vehicles would stop when they see the entry and possibly block
circulation. After people park their cars to come into the Outpatient Surgery Center, they
would see the exit door before seeing the entry causing wayfinding issues. This option is not
patient centric and would create several potential conflicts with vehicular and pedestrian
traffic.
UVM Medical Center – Outpatient Surgery Center
Memorandum: Sketch Plan Application Additional Information for May 4th DRB Hearing
April 27, 2022
8 | Page
We prefer the west facing entrance on the proposed illustrative site plan over this concept for
the functionality of the site and building entry.
Other
Staff recommends the Board discuss with the applicant whether the provided front parking
represents the minimum necessary.
The proposed handicapped parking spaces shown in the front yard represent the minimum
necessary. The handicapped parking spaces shown on the plan are required to meet ADA
and need to be located closest to the main entry of the building. The illustrative plan
highlights the location of the patient parking on the site and there are only a few spaces
located at the main entry.
UVM Medical Center – Outpatient Surgery Center
Memorandum: Sketch Plan Application Additional Information for May 4th DRB Hearing
April 27, 2022
9 | Page
Attachments
The following attachments that are referred to above are included with this memorandum.
1. Tilley II Subdivision Overall Site Plan – Record Drawing prepared by Hamlin
Engineering dated 05/26/2004
2. Tilley II Subdivision Hamlin Engineering letter to City of South Burlington dated
11/02/2004
3. UVMMC Lot 6 Tilley Drive Existing Wetland Plan Sheet W-1.0 prepared by Krebs &
Lansing dated 08/02/2021
4. Gilman & Briggs Environmental, Inc. Wetlands Analysis dated 07/28/2021
5. Outpatient Surgery Center Drive Design Original sketch prepared by Krebs & Lansing
dated 04/26/2022
6. Outpatient Surgery Center Drive Design Option #1 sketch prepared by Krebs & Lansing
dated 04/26/2022
7. Outpatient Surgery Center Partial Site Plan with South Entry Option sketch prepared by
e4h dated 04/13/2022
8. Outpatient Surgery Center Illustrative Site Plan 2.03 dated 04/26/2022
9. Outpatient Surgery Center Exterior View at Drop Off prepared by e4h dated 04/26/2022
Please Reply to:
P.O. Box 9
Essex Junction
Vermont 05453
November 2, 2004
Mr. Raymond J. Belair
City of South Burlington
57 5 Dorset Street
South Burlington, Vermont 05403
Re: Tilley II Subdivision
Dear Mr. Belair:
DONALD L. HAMLIN
CONSULTING ENGINEERS, INC.
ENGINEERS AND LAND SURVEYORS
136 Pearl Street
Essex Junction, Vermont 05452
Tel. (802) 878-3956
(802) 878-5123
Fax (802) 878-2679
We are writing on behalf of Pizzagalli Properties to provide a summary of the revisions made to the plans for the above
referenced project, in response to the comments and approval conditions received from the City of South Burlington.
For your convenience, we have presented the City's numbered comment in italics, followed by a brief discussion in
response to the comment.
South Burlington Development Review Board Conditions of Approval, dated August 9. 2004
1. All previous approvals and stipulations shall remain in fall effect, except as amended herein.
No response necessary.
2. This project shall be completed as shown on the plans submitted by the applicant, as amended by this decision,
and on file in the South Burlington Department of Planning & Zoning.
No response necessary.
3. The plat plans shall be revised to show the following changes and shall require approval from the Administrative
Officer. Four (4) copies of the approved revised plat plans shall be submitted to the Administrative Officer prior
to recording:
3a) The plans shall be revised to comply with the requests of South Burlington Water Department, as outlined in
the memorandum from Jay Nadeau, dated July 14, 2004.
See below.
3b) The plans shall be revised to comply with the requests of the City Engineer, as outlined in his memorandum
dated July 8, 2004.
See below.
3c) The plans shall be revised to comply with the requests of the City Arborist, as outlined in his memorandum
dated July 2 7, 2004.
The requests of the City Arborist will be addressed by the landscaping consultant for this project.
WATER SUPPLY AND DISTRIBlITION SUBDIVISIONS
SKILIFfS
TRAFFIC STUDIES
PERMITTING ASSISTANCE
LAND SURVEYING
WASTE WATER COLLECTION AND TREATMENT
STREETS AND HIGHWAYS
AIRPORTS
RECREATION AND INDUSTRIAL PLANNING
SOIL BORINGS
Engineering -"The link between what we have and what we need"
SOLID WASTE MANAGEMENT
Page2
3d) The plans shall be revised to account for the necessary traffic mitigation measures (left & right turn lanes on
Hinesburg Road), as determined by the applicant's traffic engineer, the consulting firm performing the
technical review, and staff, prior to recording of the final plat plans.
A Preliminary Site Plan for the left and right turn lanes on Hinesburg Road have been submitted to your
office.
3e) The plans shall be revised to depict the easement running north across the subject property, from I-89 to the
property to the north, at a width of 100 '.
The plans have been revised to increase the width of this easement from 80' to 100' throughout its length.
31) The survey plat shall be revised to depict an 80' wide access easement extending from Tilley Drive to the
easterly property boundary.
The plat has been revised in response to this comment.
3g) The plans shall be revised to show the location and details of the proposed street lights. The number and
location of the street lights shall be approved by the City Engineer.
The installation of street lights was discussed with the City Engineer at meeting on 07/22/04. At that time, the
City Engineer concurred that the installation of street lights is not required as part of this approval. Power will
be installed along the roadway as part of the construction, which will be available to support future street
lights, as appropriate.
4. The proposed project shall 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 shall meet the standards set forth in
Section 16.04 of the South Burlington Land Development Regulations.
No plan revisions were required in response to this comment. We believe the project plans conform to the
referenced standards of the South Burlington Land Development Regulations.
5. Pursuant to Section 15. 13(E) of the Land Development Regulations, any new utility lines, services, and service
modifications shall be underground.
All utilities related to this project will be underground.
6. The applicant shall post a landscape bond for $31, 000 for street trees prior to the start of road construction. This
bond shall remain in effect for three (3) years to assure that the landscaping has taken root and has a good chance
of surviving.
The applicant will post the required landscape bond prior to the start of the road construction.
7. Pursuant to Section 15.17 of the South Burlington Land Development Regulations, prior to issuance of the first
zoning permit or start of utility or road construction, the applicant shall submit all appropriate legal documents
including easements (e.g. irrevocable offer of dedication and warranty deed for proposed public roads, utility,
sewer, drainage, water, and recreation paths, etc.) to the City Attorney for approval and recorded in the South
Burlington Land Records.
The appropriate legal documents will be submitted to the City Attorney for approval and recorded in the land
records prior to the start of construction.
DONALD L. HAMLIN
Page 3
8. Prior to the start of construction of the improvements described in condition #7 above, the applicant shall post a
bond which covers the cost of said improvements.
The applicant will post a bond for the roadway improvements prior to the start of construction.
9. Pursuant to Section 15.14(£)(2) of the South Burlington Land Development Regulations, within 14 days of the
completion of required improvements (e.g. roads, water mains, sanitary sewers, storm drains, etc.) the developer
shall submit to the City Engineer, "as-built" construction drawings certified by a licensed engineer.
Record drawings will be submitted to the City Engineer upon completion of the roadway construction work.
10. Prior to recording the final plat plans and pursuant to Section 15.17 of the South Burlington Land Development
Regulations, the applicant shall submit a Certificate of Title showing the ownership of all property and easements
to be dedicated or acquired by the City, and said Certificate of Title shall be approved by the City Attorney.
A Certificate of Title will be submitted to the City for approval prior to recording of the final plat plans.
11. The left and right turn lanes on Hinesburg Road shall be constructed prior to occupancy of the first building
constructed in this subdivision, unless the applicant can demonstrate, using traffic counts and projections, that the
lanes are not warranted at that time.
As part of the first building project, the turning lane warrant analysis will be updated to reflect current traffic
counts and projections. If the turning lanes are warranted and the analysis approved by VTrans, construction of
the turning lanes will be completed prior to occupancy of the first building project in this subdivision.
12. A trip generation and traffic impact analysis including turning movement analysis shall be conducted as part of
the review of the fourth building in this development.
This work will be performed as part of the fourth building project in this development.
13. The applicant shall comply with the requests of the South Burlington Natural Resources Committee, derived at
their March 4, 2004 meeting, as follows:
l 3a) The proposed parking spaces should be reduced to the greatest extent allowable by the Development Review
Board, in order to minimize wetland impacts;
This matter will be taken into consideration during the design of the individual lot developments.
13b) There should be no mowing in the wetlands or their associated buffers and the area should remain in a
natural state;
No response necessary.
13c) There should be no pesticides applied to the wetlands or their associated buffers;
No response necessary.
13d) All disturbed earth shall be stabilized and seeded; AND
No response necessary.
13e) Vegetation in the wetlands or their associated buffers shall not be removed, with the exception of a three (3)
foot buffer along the interior fence-line for maintenance purposes.
No response necessary.
DONALD L. HAMLIN
Page4
14. Any changes to the final plat plans shall require approval of the South Burlington Development Review Board.
No response necessary.
15. The final plat plans (survey plat) shall be recorded in the land records within 90 days or this approval is null and
void. The plans shall be signed by the Board Chair or Clerk prior to recording. Prior to recording of the final
plat plans, the applicant shall submit a copy of the survey plats in digital format. The format of the digital
information shall require approval of the Director of Planning & Zoning.
This information has previously been submitted to your office.
South Burlington Water Department comments, dated July 14, 2004
1. At this time the City of South Burlington does not have sufficient water storage for any new project requiring more
than 1,000 gallons per day (gpd) in this water service area. No construction shall be permitted that may restrict
or encumber water supply and storage for the City's current customers until additional storage has been made
available.
No response necessary.
2. Please complete the Application for Water Allocation and return it to the South Burlington Water Department as
soon as possible. As your project continues, the Application for Water Allocation will need final approval, which
will be contingent upon construction of additional water storage volume serving this section of the City. Final
engineering and construction is underway and the estimate on line date for the new tank is November 2004.
An Application for Water Allocation has been submitted to the South Burlington Water Department.
3. All domestic services and fire sprinkler systems that are connected to the public water system shall be protected
with a backjlow prevention assembly, and an appropriate thermal expansion system in compliance with the
Ordinance For The Control OF Cross Connections Within The Water System Of the City O[South Burlington.
Please contact this department for more information on backjlow protection devices.
This comment will be taken into consideration during the design of the individual buildings.
4. The City of South Burlington Water Ordinance states that the property owner shall be responsible for constructing
the main to the property's farthest property line for continuation to adjoining properties. This City requirement
must be considered in design of the proposed future connector road. At that time the owner may be required to
install a water line extension to the farthest property line.
If required, the extension of the water line to the furthest property line (to the east) will be incorporated into the
design of a future road extension.
5. Typical Hydrant and Gate Valve Detail: All hydrant drains shall be plugged prior to installation. Mechanical
joint restraints shall have twist off nuts (i.e. Mega-Lug) or approved grip rings.
The Typical Hydrant and Gate Valve Detail has been revised in response to this comment.
6. Typical Trench Detail: A detectable underground marking tape is not required as the DI pipe shall have no less
then three brass wedges installed at each pipe joint.
The typical trench detail has been revised in response to this comment.
DONALD L. HAMLIN
Page 5
7. Eight-inch Ductile Iron (DI) water pipe shall have no less than three (3) brass wedges installed at each joint.
Bury depth to the new main shall be six feet (6) to the top of the pipe.
This comment has been addressed.
8. All hydrants shall meet the aforementioned specifications, and a hydrant flag shall be supplied with each hydrant.
Hydrant drains shall have all drains plugged prior to installation. Waterous Pacer fire hydrants must be ordered
with a "Boston " operating nut installed before placing the water line in service.
The plans and specifications have been revised in response to this comment.
9. No underground utility lines or structures shall be installed within four feet from the water main on either side,
from the top of the main to the finish grade, with the exception of storm sewer and sanitary sewer lines as stated in
the above referenced Specifications. Trees shall not be placed over any water main or service line, nor placed
within 20' of any appurtenance, including fire hydrants. Generally other underground utilities shall be placed on
the opposite side of the road from proposed or existing water mains.
No response necessary.
10. Separation between the water main and service line and nearby sanitary and storm sewer lines shall comply with
the VT WSR requirements and the above referenced Specifications.
No response necessary.
11. The South Burlington Water Department ordinance states that "All water lines and appurtenances not located in
the City right-of-way or public grounds shall be considered private pursuant to the ordinance and others of the
City," and;
All of the water lines and appurtenances located in the City right-of-way are intended to be publicly owned and
maintained.
12. "The Department shall not maintain any water lines that have not formally been accepted by the City, except in
subdivisions that are designed to Department specifications and are intended to be accepted,: and;
See Item #11 above.
13. "All water lines and appurtenances located within an area so designated as restricted or private by the developer
shall be considered private."
See Item #11 above.
14. At this time private fire hydrants are assessed a $100 per hydrant annual fee.
All hydrants installed as part of this project are intended to be publicly owned and maintained.
15. Prior to any building construction, the building contractor must contact this Department to discuss City
requirements for meter sizing, meter settings, and backflow protection.
No response necessary.
16. The SBWD shall be sent any future hard copy plans involving this project for review independent from those plans
sent to the Planning and Zoning Department.
A set of final plans will be submitted to the SBWD.
DONALD L. HAMLIN
Page6
17. The SBWD shall be notified prior to baclifilling to inspect all fittings, main line taps, appurtenances, water line
crossings, and testing.
No response necessary.
18. Further review changes may be required as this project proceeds through the permit process. The SB WD shall be
provided a final plat for this project prior to recording for final review and approval.
No response necessary.
19. A hard copy set of As-Bui/ts as well as one electronic copy in Auto-CAD.DWG Version 14 Format or newer shall
be supplied to this department upon completion of the water system improvements.
No response necessary.
Citv Engineer comments, dated Julv 8, 2004
On July 22, 2004 we met with the City Engineer to review and address the comments.
1. Bike path shall be constructed one foot from the street north R. 0. W
The plans have been revised to show the bike path one foot from the right-of-way on the north side of the roadway
prior to the culvert crossing. At the box culvert crossing, the bike path is shown closer to the roadway, in order to
minimize impacts to the wetlands. This concept was agreed upon at our meeting with the City Engineer.
2. Bench marks shall be noted on the plans.
The plans have been revised to include a bench mark.
3. Roadway in vicinity of the box culvert shall have a guardrail on both sides of the street.
The plans have been revised to include guardrail on both sides of the roadway in the vicinity of the box culvert.
4. Sewage pumping station design data shall be noted on the plans. The station will be owned and maintained by an
association of users. The design of the station shall be reviewed and approved by City Water Pollution Control
Superintendent.
At our meeting, we indicated that, as the roadway is to be turned over to the City, we envision that the sewage
forcernain and pump station will also be turned over to the City. The City Engineer was going to check on this
matter with the Water Pollution Control Department and let us know ifthere is any further action required by the
applicant. To date, we have not heard back from either the City Engineer or the Water Pollution Control
Department regarding this matter.
5. Design data for the emergency sewage storage tank shall be noted on the plans.
The plans have been revised to include this information.
6. Curb cuts to serve lots shall have depressed concrete curbs.
The plans have been revised to show depressed concrete curbs at proposed curb cuts.
7. Barrier concrete curbing shall be continuous around the cul-de-sac.
At our meeting, we indicated that we were proposing to install curbing around the inside of the cul-de-sac only.
The pavement surface around the cul-de-sac is proposed to slope away from the center and therefore no curbing is
proposed around the outside. The City Engineer found this to be acceptable.
DONALD L. HAMLIN
Page 7
8. Sewage pumping station controller shall be placed close to the wet well opening.
The pump station specifications state that the pump controls are to be installed in a location adjacent to the pump
station.
South Burlington Water Department comments, dated September 14, 2004
l. This Department has received your Application for Water Allocation requesting 9, 990 gpd. A conditional water
allocation letter is attached to this plan review. As your project continues, the Application for Water Allocation
will need final approval, which will be contingent upon construction of additional water. storage volume serving
this section of the City. Final engineering and construction is underway and the estimated on line date for the new
tank is November 2004.
No response necessary.
2. The proposed fire hydrants shall be spaced approximately 500' apart from the last existing fire hydrant in Phase 1,
with the last hydrant located near the end of the proposed water main. The last hydrant shall be installed just
prior to the last 8" gate valve with end cap and thrust block, and after the last 6" service line near station 28+ 70.
After speaking with Mr. Nadeau on 10/15/04, we have made the following changes to the plans; the hydrant at
station 21 +50 has been relocated to station 23+95, the hydrant at station 27+ 15 will remain, and a new blow-off
has been provided at the end of the water line.
3. The 8" gate valve near station 25+20 can be removed, as there is a gate valve at station 24+00 and one at station
26+80.
The plans have been revised in response to this comment.
4. All water mains shall be polyethylene encased.
The Typical Trench Detail for Ductile Iron Waterline has been revised in response to this comment.
5. All domestic services and fire sprinkler systems that are connected to the public water system shall be protected
with a backflow prevention assembly, and an appropriate thermal expansion system in compliance with the
Ordinance For The Control Of Cross Connections Within The Water System Of the City of South Burlington.
Pi ease contact this department for more information on backflow protection devices.
This comment will be taken into consideration during the design of the individual buildings.
6. Typical Hydrant and Gate Valve Detail: All hydrants drains shall be plugged prior to installation. Mechanical
joint restraints shall have twist off nuts (i.e. Mega-Lug) or approved grip rings.
The Typical Hydrant and Gate Valve Detail has been revised in response to this comment.
7. Typical Trench Detail: A detectable underground marking tape is not required, as the DI pipe shall have no less
then three brass wedges installed at each pipe joint.
The typical trench detail has been revised in response to this comment.
8. Eight-inch Ductile Iron (DI) water pipe shall have no less than three (3) brass wedges installed at each joint.
Bury depth to the new main shall be six feet (6 ') to the top of the pipe.
This comment has been addressed.
DONALD L. HAMLIN
TNEW SMH 8-1NEW SS1EX SMHNEW SS2NEW 6" INV.385.00POND OUTLET 1EX CBNEW SD1NEW SD2POND OUTLET 2EVEVT5+00SWR3+00SWR4+00SWRWetland B 2019
Wetland A
2019
REVIEW AREA - Lot 6 - Total Area = 13.53 acres / 589,413 sf.
Wetland A:
Total Area = 4,111sf.
Area on Lot 6 = 3,966 sf
Wetland B:
Total Area = 10,862 sf.
Area on Lot 6 = 10,249 sf
CIVIL ENGINEER
SCALE:
REVISED:
DRAWN BY:
PROJECT NO:
DATE:
CONTENT:
Project Phase
W-1.0
TJB
CONCEPT DRAWINGS
UVMMC
LOT 6
TILLEY
DRIVE
Tilley Drive, South
Burlington, VT.
NO. DESCRIPTION DATE
21202/12223
1" = 50'
Existing
Wetland
Plan
PERMIT REVIEW ONLY
164 Main Street, Suite 201, Colchester, VT 05446
T: (802) 878-0375 F: (802) 878-9618
email@krebsandlansing.com
Vermont State Plane
Grid North (NAD83)
8/02/21Tilley DriveHinesburg Road / Route 116
REVIEW AREA
LOT 6
Mountain View Business Park
Gilman & Briggs Environmental, Inc.
1 Conti Circle, Suite 5 Barre, Vermont 05641
Tel: (802) 479-7480; FAX: (802) 476-7018
team@gbevt.com
Two wetlands have been identified in the vicinity of Mountain View Business Park Lot 6 off Tilley Drive in South Burlington. These wetlands are shallow depressions on formerly agricultural lands. They were originally delineated in April 2006 using the methodology found in the 1987 U.S. Army Corps of Engineers Wetland Delineation Manual, and re-delineated in
October 2019 using the Manual and the 2009 Regional Supplement as required by the Vermont Wetland Rules . Neither wetland is shown on the Vermont Significant Wetlands Inventory, and because of their size, location and lack of functional value, they were determined to be Class III by the Vermont Department of Environmental Conservation on 28 October 2019.
These wetlands occupy areas mapped as poorly drained Covington silty claw and are dominated by reed canary-grass (Phalaris arundinacea), meadow foxtail (Alopecurus pratensis), as sedge (probably Carex crawfordii), creeping bent (Agrostis stolonifera) and water-pepper (Persicaria hydropiper). They would be classified as seasonally saturated emergent (PEME) wetlands.
I performed an analysis of these wetlands’ functions and values, and per Art. 12.02 D(1) of the Regulations, we submit the following report: Water Storage for Flood Water and Storm Storage: These wetlands are very small, not contiguous to streams and not part of a collection of small wetlands that that provide this
function collectively. Additionally, there is minimal storage capacity in these wetlands. Surface and Ground Water Protection. These wetlands are very small, not contiguous to streams and not part of a collection of small wetlands that that provide this function collectively, therefore their capacity to perform this function is limited, and because there is no evidence of
pollutant or sediment input, they also lack the opportunity to perform the function. Fish Habitat. There is no open water associated with these wetlands and no connection to wetlands that may contribute to the function, therefore they do not provide fish habitat. Wildlife Habitat. Wetland hydrology and character in these wetlands are at the drier end of the scale and do not support wetland dependent species, and current use results in frequent cutting and mowing. We did not note the presence of any wetland dependent species in either of these wetlands. Exemplary Wetland Natural Community. These wetlands meet none of the physical and vegetative characteristics that denote exemplary wetland natural communities. Rare, Threatened, and Endangered Species Habitat. No rare, threatened, or endangered species are associate with these wetlands.
Education and Research in Natural Sciences. These wetlands lack any characteristics that
would contribute to this function.
Recreational Value and Economic Benefits. These wetlands lack any characteristics that would contribute to this function.
Open Space and Aesthetics. Although these wetlands are readily visible from either Tilley
Drive or Old Farm Road, they are more likely to be perceived as merely part of a hayfield than wetlands. Neither wetland has any special or unique aesthetic quality. Erosion Control Through Binding and Stabilizing the Soil. There are no erosive forces
associated with these wetlands and therefore no opportunity to perform this function.
Based on the foregoing, I conclude that encroachment into the wetlands and their buffer zones will not adversely affect the ability of the property to carry or store flood water adequately (Art. 12.02 E(3)(a), will not adversely affect the ability of the proposed stormwater treatment system
to reduce sedimentation according to state standards (Art. 12.02 E(3)(b). and because the
wetlands have minimal functions and values, Art. 12.02 E(3)(c) of the Land Development Regulations does not apply. Sincerely,
Errol C. Briggs 28 July 2021
EVEVNew Building
OSC
390
391
392
393
394387
387
388
389
390
391
392388389390 395397
398394391392393394
390
394390387W395396396
397
398393 391
390
390 388
387
3
9
4
393EELECELEC
394
387
393
B
B
BBENCHBENCHBENCHBENCHBENCH
BENCH
BENCH
B +396395
394
393
390387
B
FDC
CL1
CL1
CL1
CL1
CL2
CL2
CL2
SIGN
SIGN
SL2
SL3
SL3
SL3
SL3
SL3
SL3
SL3
SL3
SL3
SL3
SL3
SL3
SL3
SL3
SL4
SL4
SR1SR1SR1SR1SR1
SR1
SR1
SR1
SR1
SR1
SR1
SR1
SR1
SS1
SS1
SS1
SS1
SW1HH HHOUTPATIENT SURGERY CENTER
UVM HEALTH NETWORK
LOT 6; TILLEY DRIVE
SOUTH BURLINGTON, VT 05403164 Main Street, Suite 201 P: (802) 878-0375
Colchester, Vermont 05446 www.krebsandlansing.com
Date:
Scale:
Job No:
4-26-2022
1" = 40'
20102
Ref Drawing:C-1.1
Drive Design
Original
Table of Wetland Disturbance
= 5640 sf
X 395.0
Table of Wetland Buffer Disturbance
= 16,990 sf
EVEVNew Building
OSC WEELECELECB
B
BBENCHBENCHBENCHBENCHBENCH
BENCH
BENCH
B
B
FDCHH HHOUTPATIENT SURGERY CENTER
UVM HEALTH NETWORK
LOT 6; TILLEY DRIVE
SOUTH BURLINGTON, VT 05403164 Main Street, Suite 201 P: (802) 878-0375
Colchester, Vermont 05446 www.krebsandlansing.com
Date:
Scale:
Job No:
4-26-2022
1" = 40'
21202 Drive Design
Option #1
Table of Wetland Disturbance
= 1590 sf
3' wide shoulder with
guardrail and retaining wall
20102\dwgs\WB67 in OSC Entrance.dwg
x 395.0
Table of Wetland Buffer Disturbance
= 14,500 sf