Engineering comments CbTHE E-MAILED North Country Office
awn 9, 375 Bay Road,Queensbury, NY 12804
P:(518)812-0513 F:(518)812-2205
COMPANIES wwwchazencompanles,com
Hudson Valley Office (845,)454-3980
Engineers
Land Surveyors Capital District Office (518)273-0055
Planners
Environmental Professionals
Landscaoe Architects
March 9,2016
Mr, Craig Brown
Zoning Administrator and Code Compliance Officer
Town of Queensbury
742 Bay Road
Queensbury,New York 12804
Delivered via email only:gL1At8@_queensb
AU.net
Re: Ted&Shari Crimes
Town of Queensbury, Warren County, New York
Chazen Project#91600,21
Queensbury Ref.No:SP77-2016
Dear Mr.grown:
The Chazen Companies (Chazen) has received a submission package from your office for the above
referenced project. The Applicant Intends to construct a single-family dwelling and driveway.Submitted
information includes the following:
• Site Plans titled"The Crimes Residence',prepared by the LA Group,dated February 9, 2016;
• Stormwater Pollution Prevention Plan, prepared by the LA Group,dated February 15,2016;
• Supplemental Information for Site Plan Application;
• Town of Queensbury Freshwater Wetlands Permit Application,and;
• A site plan review application.
Your office has requested that we limit our review to the design of stormwater management and
erosion and sediment control Items as it relates to compliance to local, state or relevant codes and
regulations. Based upon our review of the Information provided, Chazen offers the following comments
for the Town's consideration:
Stormwater Management&Erosion and Sediment Control.
1. The proposed site development disturbs less than 1 acre of land and will not be subject to
NYSDEC Phase 11 Stormwater Regulations. However, this project falls within the Lake George
watershed and will be subject to the stormwater management requirements set forth in section
147-11 of the Town code, for projects within the Lake George Park. The project proposes to
disturb over 15,000 square feet and Is considered a"major project,
2. Section 147-11-1(3)(c)(11 states, "Storrnvoter control measures shall be designed so that there
will be no increase in runoff volume form a ten-year-frequencyltwenty-fotir-hour-durat[Ol?storm
-__. .........__
Chazen Engineering,Land Surveying&Land3cape Archdectore Co.,UP,C,
Chazen Environmental Seevices,Inc,
The Chazen Companhss, 0c,
Town of Queen sbury
The CrImes Rtsidence
March 9,2016
Page 2
event following development over the predevelopment volume." Design point 2 existing
condition has a runoff volurne of 0.032 acre-feet and Design point 2 proposed condition has a
runoff volurne of 0,04 acre-feet; the Applicant to revise the stormwater design such that it
complies with Section 147-11-1(3)(c)[1],
3. Section 147-1.1-1(3)(c)[2) states, "For storm events exceeding the ten-year design storm, the
stormwater control measures shall function to attenuate peak runoff flow rates for a twenty-
five-year-frequency storm to be eq uol to or less than predevelopment flow rates.""The table on
page 10 of the SWPPP does riot match the HydroCAD results; the Design point 2 existing
condition has a runoff rate of 0.95 cfs and Design point 2 proposed has a runoff rate of 1,16 cfs;
the Applicant to revise the storrnwater design such that it complies with Section 147-11-
1(3)(c)(2)m
4. Section 147-11(i)(3)(c)(4) of the Town code states that "infiltration devices for major projects
shall be located a minimum of.100 feet from Doke George and any down-gradient drinking water
supply, lake, river, protected stream, water well, pond, wetiond;a separation of more than 100
feet may be,required in cases where contamination of the water supply is possible due to highly
permeable solls, shallow groundwater an similar situations. The separation distance shall be a
minimum of 5D feet from up-gradlent water supplies. Designs shall mitigate adverse effects that
groundwater recharge will hove on adjacent wells, water supplies, wastewater treatment
systems, buildings, roadways, properties and stormwater control measure.Stormwoter recharge
areas shall be located a minimum of 100 feet from the subsurface treatment system of
wastewater treatment system unless it is demonstrated that a lesser separation will not
adversely,affect the functioning of such leach fields." The following practices do not appear to
conform to Section 147-11(l)(3)(c)(4):
a) It appears that Grass Depression, Rain Garden 2, 3, 4, and Stormwater Planter 4 are
located within 100 feet of the wastewater treatment system. The Applicant should
demonstrate that the stormwater features located less than 100 feet from the leach
field will not affect the leach field.
b) it appears that Stormwater Planter 1, 2, and Rain Garden 4 are located within 100 feet
of wetland,
The Applicant shall revise the design to demonstrate compliance with the noted standards,
Alternatively if the Applicant Is requesting a variance from the setback distances, they should
request the same and provide justification for the variances In support of the design,
5, Stormwater Planter 2 receives runoff from the proposed driveway; according to Table I
Required Minimum Separation Distances to Protect Water Wells From Contamination of Part 5
Standards for Water Wells of the NYS DOH,water wells shall be separated a minimum horizontal
distance of 100 feet from surface wastewater recharge absorption system constructed to
discharge storm water from parking lots, roadways or driveways. Stormwater Planter 2 is
located approximately 40 feet from the existing water well.The Applicant shall revise the design
to conform to the NYSDOH water well separation standards.
KA9�91M,WMA91wafifl-Town of & -'Pod
Town of Queensbury
The Crimes Re,'Jdence
March 9,2016
Page 3
6, The Applicant shall ensure the specific erosion control measures prescribed Section 147-11-J are
Included in the erosion control notes(i.e. 147-11-J( )(b)and(c)).
7, The Applicant shall Include on the plans details demonstrating compliance with Section 147-11-
1(3)(c)(5)of Town code,which states:"Infiltration devices shall be designed to extend a minimum
of I0%of the infiltration surface area below the prevailing frost depth orfora feet(whichever Is
greater)in order to provide infiltration during winter months'
Conclusions and Recommendations
It is our opinion that the applicant should provide clarification for the above items and incorporate the
changes In subsequent plan submissions,
if you have any questions regarding the above,please do not hesitate to contact me at(518)824-1926,
Sincerely,
1-10,
Sean M. Doty, P.E., LEED AP
Principal
Manager, Municipal Engineering Services
cc: Sunny Sweet,Town Planning Office Administrator(via email)
Laura Moore,Town Land Use Planner(via email)
File
town SP77'2016Ted& red&ShWfl mx