NY - Plattsburgh: Planning Board Regular Meeting Agenda

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Planning Board Regular Meeting Agenda

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Planning Board Regular Meeting Agenda

Tagged Passions:planning

PB AGENDA 112717.PDF

2017-24 Supporting Docs

2017-24 SITE PLAN APPLICATION.PDF 2017-24 STORMWATER_MGMT_SUMMARY.PDF 2017-24 (11-7-17) FULL SET.PDF 2017-24 PLATTSBURGH NY - CEE-3.PDF 2017-24

PLATTSBURGH NY - CFP.PDF 2017-24 SIGNED COVER SHEET.PDF 2017-24 SIGNED SHORT FORM.PDF

Supporting Docs

2017-26 460 MARGARET.PDF 2017-25 65 COURT ST PB.PDF

Tagged Passions:court and legal

1.

1.I.

Documents:

1.II.

Documents:

1.III.

Documents:

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scleason Typewritten Text ALDI Expansion

Tagged Passions:grocery and expansion

scleason Typewritten Text APD Engineering Arch for ALDI, Inc

Tagged Passions:grocery

scleason Typewritten Text 615 Fishers Run

scleason Typewritten Text Victor

scleason Typewritten Text NY

scleason Typewritten Text 14564

scleason Typewritten Text 585-742-0200

scleason Typewritten Text email scleason@apd.com

scleason Typewritten Text APD Engineering and Architecture

scleason Typewritten Text 615 Fishers Run

scleason Typewritten Text Victor

scleason Typewritten Text NY

scleason Typewritten Text 14564

scleason Typewritten Text 585-742-0200

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scleason Typewritten Text ALDI, Inc

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scleason Typewritten Text 300 NYS Route 281

scleason Typewritten Text Tully

scleason Typewritten Text NY

scleason Typewritten Text 13159

scleason Typewritten Text 315-696-2425

scleason Typewritten Text 328 Cornelia Street, Plattsburgh, NY

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scleason Typewritten Text Commericial

scleason Typewritten Text 14.23 acres

scleason Typewritten Text B2 Highway Business District

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scleason Typewritten Text

scleason Typewritten Text 207.17-1-1

scleason Typewritten Text Commercial - No change proposed just expansion of existing store

Tagged Passions:expansion and commercial

scleason Typewritten Text lot 14.23 acres only 0.68 to have soil disturbance

scleason Typewritten Text 4 to 6 Months

scleason Typewritten Text No

scleason Typewritten Text Site Planned approval and Building Permit

scleason Typewritten Text The store will be expanded from +/-16,623 sf to +/-20,015 sf

Tagged Passions:commercial

scleason Typewritten Text Commercial front and vacant in rear

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scleason Typewritten Text ALDI Store in front open/brush in rear

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scleason Typewritten Text Commercial along road, some open space and residential further north

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scleason Typewritten Text

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scleason Typewritten Text The proposed expansion will be an extension of the existing use sales and storage.

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scleason Typewritten Text

scleason Typewritten Text +/-450,000

scleason Typewritten Text +/-3 Part time emp.

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POST CONSTRUCTION STORMWATER MANAGEMENT PLAN

Tagged Passions:construction and stormwater

for

ALDI PLATTSBURGH, NY

Tagged Passions:grocery

CITY OF PLATTSBURGH CLINTON COUNTY, NY

Prepared for: ALDI Inc., Tully Division

Tagged Passions:grocery

300 State Route 281 Tully, NY 13159

Prepared by:

615 Fishers Run, Victor, New York 14564 Phone: 585.742.2222 Fax: 585.924.4914 Website: www.apd.com eMail: info@apd.com

Original Date: October 31, 2017

APD Project No. 17-0170

COPYRIGHT 2017

APD Engineering Architecture, PLLC

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ALDI Inc. is proposing a 3,100 SF expansion to their existing store located at 328 Cornelia St in the City of Plattsburgh. This will include the

addition of twelve parking spaces and additional impervious area from the building expansion near the loading dock. The existing drainage pattern will generally be maintained and runoff from the impervious areas will continue to discharge to the two interconnected detention basins. There will be minor changes to the drainage areas for the two ponds, but all runoff from the impervious areas ultimately discharge to the south detention basin where it leaves the site via storm sewer. There will be a net increase in impervious of 0.06 acres for the site. Table I below calculates the additional impervious area. Appendix A shows the changes to the drainage area calculations from the original 2005 stormwater report.
Tagged Passions:Utility, grocery, boating, expansion, detention, sewer, commercial, utility, parking, and stormwater

Table I Existing ALDI Proposed Expansion Area 1.1 0.84 Acres 0.90 Acres Area 1.2 0.77 Acres 0.77 Acres

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Based on the as built survey obtained for the expansion project, the northern detention basin grading and the southern detention basin outlet

structure were not constructed per the original design. The basins were analyzed using the SCS Method in Hydraflow Hydrographs and redesigned as necessary for the 1, 10, and 100 year storm events. The proposed expansion discharge rates were compared against the existing site (pre ALDI) to maintain the original design intent. Current rainfall data was obtained obtained from the Extreme Precipitation in New York New England website and utilized for the design.
Tagged Passions:grocery, grading, rates, expansion, detention, and events

Table II below summarizes the Hydraflow output for the peak runoff rate associated with the drainage areas contributing to the existing basins.

Values for the original design from the 2005 storm report and the new analysis are provided for comparison. Appendix B contains the Hydraflow Hydrographs output for the existing conditions. Appendix C contains the proposed drainage area map and the Hydraflow Hydrographs output for the proposed conditions (post expansion).
Tagged Passions:expansion and stormwater

Table II Peak Flow Rates

Tagged Passions:rates

(from 2005 Storm Report)

Peak Flow Rates

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Existing Proposed Existing Proposed 1 year storm event

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0.81 cfs 0.95 cfs 0.62 cfs 0.87 cfs 10 year storm event

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2.70 cfs 2.56 cfs 2.86 cfs 1.74 cfs 100 year storm event

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6.30 cfs 3.14 cfs 7.92 cfs 5.44 cfs

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The peak discharge rates from the site for the 10 and 100 year storm events will be decreased after the expansion is complete.

Tagged Passions:rates, expansion, and events

The proposed peak discharge rate for the 1 year storm event will create an increase in the discharge rate of 0.25cfs. The increase in the peak

discharge rate has increased from the original design, however this is mostly due to the increase in the rainfall rates used for the current analysis rather than an impact from the expansion. The new impervious areas will be routed through the pond which will only generate 0.24 cfs for the 1 year storm. This discharge rate is released through a 3 orifice in the outlet structure which is the smallest orifice size recommended by NYSDEC. The remainder of the discharge is from Area 1.3 which discharges directly to the storm sewer system to the east of the site. The discharge rate for Area 1.3 for the 1 year storm event is 0.69 cfs (exceeding the existing conditions). Area 1.3 is not being modified as part of the expansion.
Tagged Passions:Utility, rates, expansion, events, sewer, and utility

To accommodate the additional impervious areas as well as mitigate the deviates from the original design plan and construction of the original ALDI

building, two changes are proposed. The northern basin will be enlarged to more closely match the original design volume from the 2005 report. The outlet structure from the south basin will add a 3 low flow orifice to minimize the discharge from the smaller storm events and the grate elevation will also be modified.
Tagged Passions:grocery, events, and construction

APPENDIX A

Revised Drainage Area Calculations

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salbright Text Box Expansion = 3,104 SF. Approx 650SF is new impervious (previous lawn from Area 2). The remainder is asphalt to building, but it

changes from Area 1.2 to Area 1.1. Appoximately 450SF of pavement from Area 1.1 changes to canopy which will now go to 1.2. Therefore 3104-450 (2654) is new impervious to Area 1.1 and 3104-650-450-1730 (274) is the reduction in impervious from 1.2.
Tagged Passions:expansion

salbright Text Box 39229

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salbright Text Box 0.90

salbright Text Box 88.26

salbright Text Box 114.19

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salbright Text Box 1.33 ac

salbright Text Box 85.86

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salbright Text Box 33392

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salbright Text Box 75.12

salbright Text Box 92.89

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salbright Text Box 87.63

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APPENDIX B

Hydraflow Hydrographs Output for Existing Conditions

Hydraflow Table of ContentsM:\2017 Jobs\170 - ALDI Plattsburgh NY - Expansion\Civil\Design Documents\Reports\Stormwater\Original Existing

Conditions.gpw
Tagged Passions:grocery, expansion, jobs, and stormwater

Hydraflow Hydrographs Extension for AutoCAD Civil 3D 2015 by Autodesk, Inc. v10.4 Tuesday, 10 / 24 / 2017

Hydrograph Return Period Recap............................................................................. 1

1 - Year Summary Report......................................................................................................................... 2

Hydrograph Reports................................................................................................................... 3

Hydrograph No. 1, SCS Runoff, Area A................................................................................... 3

10 - Year Summary Report......................................................................................................................... 4

Hydrograph Reports................................................................................................................... 5

Hydrograph No. 1, SCS Runoff, Area A................................................................................... 5

100 - Year Summary Report......................................................................................................................... 6

Hydrograph Reports................................................................................................................... 7

Hydrograph No. 1, SCS Runoff, Area A................................................................................... 7

IDF Report.................................................................................................................... 8

Hydrograph Return Period Recap 1

Hyd. Hydrograph Inflow Peak Outflow (cfs) Hydrograph

No. type hyd(s) Description

(origin) 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr

1 SCS Runoff ------ 0.619 ------- ------- ------- 2.862 ------- ------- 7.917 Area A

Proj. file: M:\2017 Jobs\170 - ALDI Plattsburgh NY - Expansion\Civil\Design Documents\Reports\Stormwater\Original Existing ConditTuesday, 10 / 24 /

2017
Tagged Passions:grocery, expansion, jobs, and stormwater

Hydraflow Hydrographs Extension for AutoCAD Civil 3D 2015 by Autodesk, Inc. v10.4

Hydrograph Summary Report 2

Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph

No. type flow interval Peak volume hyd(s) elevation strge used Description

(origin) (cfs) (min) (min) (cuft) (ft) (cuft)

1 SCS Runoff 0.619 1 727 2,696 ------ ------ ------ Area A

M:\2017 Jobs\170 - ALDI Plattsburgh NY - Expansion\Civil\Design Documents\Reports\Stormwater\Original Existing Conditions.gpwReturn Period: 1 Year

Tuesday, 10 / 24 / 2017
Tagged Passions:grocery, expansion, jobs, and stormwater

Hydraflow Hydrographs Extension for AutoCAD Civil 3D 2015 by Autodesk, Inc. v10.4

Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD Civil 3D 2015 by Autodesk, Inc. v10.4 Tuesday, 10 / 24 / 2017

Hyd. No. 1

Area A

Hydrograph type = SCS Runoff Peak discharge = 0.619 cfs Storm frequency = 1 yrs Time to peak = 727 min Time interval = 1 min Hyd. volume = 2,696 cuft

Drainage area = 2.840 ac Curve number = 73 Basin Slope = 0.0 Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 17.93 min Total precip. = 1.87 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484
Tagged Passions:stormwater

3

0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560

Q (cfs)

0.00 0.00

0.10 0.10

0.20 0.20

0.30 0.30

0.40 0.40

0.50 0.50

0.60 0.60

0.70 0.70

0.80 0.80

0.90 0.90

1.00 1.00

Q (cfs)

Time (min)

Area A Hyd. No. 1 -- 1 Year

Hyd No. 1

Hydrograph Summary Report 4

Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph

No. type flow interval Peak volume hyd(s) elevation strge used Description

(origin) (cfs) (min) (min) (cuft) (ft) (cuft)

1 SCS Runoff 2.862 1 725 9,053 ------ ------ ------ Area A

M:\2017 Jobs\170 - ALDI Plattsburgh NY - Expansion\Civil\Design Documents\Reports\Stormwater\Original Existing Conditions.gpwReturn Period: 10 Year

Tuesday, 10 / 24 / 2017
Tagged Passions:grocery, expansion, jobs, and stormwater

Hydraflow Hydrographs Extension for AutoCAD Civil 3D 2015 by Autodesk, Inc. v10.4

Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD Civil 3D 2015 by Autodesk, Inc. v10.4 Tuesday, 10 / 24 / 2017

Hyd. No. 1

Area A

Hydrograph type = SCS Runoff Peak discharge = 2.862 cfs Storm frequency = 10 yrs Time to peak = 725 min Time interval = 1 min Hyd. volume = 9,053

cuft Drainage area = 2.840 ac Curve number = 73 Basin Slope = 0.0 Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 17.93 min Total precip. = 3.05 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484
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0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560

Q (cfs)

0.00 0.00

1.00 1.00

2.00 2.00

3.00 3.00

Q (cfs)

Time (min)

Area A Hyd. No. 1 -- 10 Year

Hyd No. 1

Hydrograph Summary Report 6

Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph

No. type flow interval Peak volume hyd(s) elevation strge used Description

(origin) (cfs) (min) (min) (cuft) (ft) (cuft)

1 SCS Runoff 7.917 1 724 23,563 ------ ------ ------ Area A

M:\2017 Jobs\170 - ALDI Plattsburgh NY - Expansion\Civil\Design Documents\Reports\Stormwater\Original Existing Conditions.gpwReturn Period: 100 Year

Tuesday, 10 / 24 / 2017
Tagged Passions:grocery, expansion, jobs, and stormwater

Hydraflow Hydrographs Extension for AutoCAD Civil 3D 2015 by Autodesk, Inc. v10.4

Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD Civil 3D 2015 by Autodesk, Inc. v10.4 Tuesday, 10 / 24 / 2017

Hyd. No. 1

Area A

Hydrograph type = SCS Runoff Peak discharge = 7.917 cfs Storm frequency = 100 yrs Time to peak = 724 min Time interval = 1 min Hyd. volume = 23,563

cuft Drainage area = 2.840 ac Curve number = 73 Basin Slope = 0.0 Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 17.93 min Total precip. = 5.04 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484
Tagged Passions:stormwater

7

0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560

Q (cfs)

0.00 0.00

2.00 2.00

4.00 4.00

6.00 6.00

8.00 8.00

Q (cfs)

Time (min)

Area A Hyd. No. 1 -- 100 Year

Hyd No. 1

Hydraflow Rainfall Report 8

Hydraflow Hydrographs Extension for AutoCAD Civil 3D 2015 by Autodesk, Inc. v10.4 Tuesday, 10 / 24 / 2017

Return Intensity-Duration-Frequency Equation Coefficients (FHA) Period

(Yrs) B D E (N/A)

1 0.0000 0.0000 0.0000 --------

2 0.0000 0.0000 0.0000 --------

3 0.0000 0.0000 0.0000 --------

5 0.0000 0.0000 0.0000 --------

10 0.0000 0.0000 0.0000 --------

25 0.0000 0.0000 0.0000 --------

50 0.0000 0.0000 0.0000 --------


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