HomeMy WebLinkAboutZMA202100008 Correspondence 2022-02-08608 Preston Avenue P 434.295.5624
Suite 200 F 434.295.1800
T I M M O N S GROUP
Charlottesville, VA 22903 www.timmons.com
February 7, 2022
Board of Supervisors
County of Albemarle
401 McIntire Rd
Charlottesville, VA 22902
RE: Old Ivy Preliminary Central Sewerage System & Central Water Supply Proposal
In accordance with section 16-102 of the Albemarle County Code of ordinances, we are requesting the
establishment of a central sewerage system and central water supply system associated with ZMA202100008
for the proposed Old Ivy development. The water and sewer system are anticipated to serve 490-525 units. It
is intended that Greystar will install, maintain, and own all units and private utilities within the development,
including the water and sewer systems. Preliminary descriptions for both facilities are included below:
Central Sewerage System:
The central sewerage system will consist of a conventional sewer system that drains to a lift station within
the approximate center of the development. The lift station is planned to pump a single force main that exits
the development and connects to an existing ACSA gravity sanitary sewer. The only existing ACSA gravity
sewer in proximity of the site is at the southeast corner of the property at an approximate depth of four (4)
feet to the invert out. Further the existing ACSA gravity sewer system is located at the highest elevation along
the Old Ivy frontage of the site. Grades along Old Ivy and thus the site fall east to west generally towards the
250 bypass. Given the existing undulating grades of the site and site areas well below the existing ACSA sewer
invert, it is not possible to gravity sewer the project to the existing ACSA sewer.
We will continue to coordinate with ACSA on the final details for the point of connection during the
site plan process. It is understood and acknowledged ACSA has shared capacity concerns for the existing
system along Old Ivy (south sewer option). Greystar acknowledges that should the sewer design require
infrastructure upgrades; they will coordinate any required upgrades with ACSA. There is also a potential
alternative option to sewer to the north which may be coordinated with ACSA at final Site Plan. The north
sewer option is also generally shown on the attached exhibits.
The pump station will consist of duplex submersible pumps, level controls, a circular precast concrete wet
well (6' or 8' diameter), a precast concrete valve vault, and an emergency pump connection. The wastewater
pumps will be sized for a peak flow of approximately 285-298 gallons per minute (GPM), as summarized in
the table and description below. Sanitary flows will need to be confirmed during design based on the final
unit count.
Emergency backup power will be provided to the pump station by a permanent standby generator to meet
the Virginia Department of Environmental Quality (VDEQ) Class I reliability standards. An alarm dialer will
transmit alarms from the pump control panel to maintenance personnel. The proposed pump station will
discharge through a new 4" or 6" force main and connect to an existing ACSA manhole. The pump station and
force main will be privately owned and maintained by the developer.
ENGINEERING I DESIGN I TECHNOLOGY
Flow Factor
Average Flow
Unit Type
Units
GPD
GPD
1- Bedroom Apartment
138
200
27,600
2-Bedroom Apartment
149
300
44,700
3-Bedroom Apartment
37
400
14,800
Family Detached with
Singlee
25
10,000
Garage
400
Single Family Detached
40
16,000
without Garage
400
Townhome
47
400
18,800
Duplex
54
600
32,400
Total Average Flow
164,300
(GPD)
Total Unit Count
490
peaking Factor
2.5
Peak Flow (GPM)
285
Abbreviations:
GPD - Gallons Per Day
GPM - Gallons Per Minute
The range of units proposed on the associated ZMA have a maximum of 525 units. The additional 35 units are
assumed to be 1-bedroom units which would add an additional 7,000GPD of average flow and raise the total
peaked flow up to 298 GPM.
To summarize, our request is for permission to provide a central sewerage lift station to serve the site with a
connection to the existing ACSA gravity sewer network determined at final Site Plan in coordination with
ACSA.
Central Water Supply System:
It is anticipated that the development will be served through a new connection to the existing ACSA 12"
water line along Old Ivy Road. Master meters will be located at the site entrance to serve the development.
The location, size and quantity of master meters required to serve the site will be coordinated with ACSA
during the final Site Plan process. The purpose of this request stems from the ownership and rental structure
of the site. The applicant (Greystar) will own and rent all units on the site including the apartments, single
family and attached products. The master metering of the water service is for Greystar to maintain water
service and current billing for site with the continual turnover of units in the rental market environment. The
onsite water distribution system will be privately owned and maintained for service to all units with
submetering at the owners discretion.
Attachments Included:
1. Central Sewer & Water Supply Exhibit
2. ACSA GIS Map Illustrating North Sewer Option
3. Old Ivy Residences— Overall Site Grading (conceptual grading)
Thank you for considering this request. Please do not hesitate to reach out with any questions.
SincereI ,
T
Bryan Cichocki, PE
Project Manager
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