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Average annual daily flow (GPD) based on attached guidelines (page 3-4) Peak flow (GPM) for all commercial, mixed-use, and residential projects. Instantaneous peak flow (GPM) for all industrial projects. Design Professional SUBMIT COMPLETED, SIGNED, SEALED FORM AND DOCUMENTS TO: [email protected] 678-376-7026 Gwinnett County Department of Water Resources 684 Winder Highway, Lawrenceville, GA 30045 _______ GIS map showing proposed development, surrounding utilities, and location of tie-in manhole _______ Proposed utility plan. _______ Name of downstream pump station ___________________________________________________________ SIGNED/SEALED: ________________________________________DATE: _________________________________ Page 1 of 4 GWINNETT COUNTY DEPARTMENT OF WATER RESOURCES SEWER CAPACITY CERTIFICATION REQUEST DEVELOPMENT/PROJECT NAME: ___________________________________________________________________________________ DEVELOPMENT ADDRESS: _________________________________________(City) ______________________ (Zip) _______________ PARCEL NUMBER(S): _____________________________________________________________________________ _______ OWNER NAME: __________________________________________ PHONE#: ___________________________ ______ PROPERTY OWNER EMAIL: ________________________________________________________________________________________ DEVELOPER NAME: ____________________________________________________________________________________________ ADDRESS: ________________________________________ (City/State) __________________________ (Zip) ___________ CONTACT NAME: ____________________________________________PHONE#: ____________________________ __ DEVELOPER EMAIL: _________________________________________________________________________________________ ____ ENGINEERING FIRM: ____________________________________________________________________________________________ ADDRESS: _________________________________________ (City/State) __________________________ (Zip) __________________ CONTACT NAME: ____________________________________________PHONE#: _______________________________________ ENGINEER EMAIL: ______________________________________________________________________________________________ Requested Peak Flow(s) (GPM): ______________________________________________________________________ Tie-in Manhole Facility ID(s): ________________________________________________________________________ Include the following items in your submittal package: _______ Detailed flow calculations for proposed development/project.

Tie-in Manhole Facility ID GWINNETT COUNTY DEPARTMENT …...Page 4 of 4. GWINNETT COUNTY GRAVITY SEWER DESIGN FLOW CALCULATION GUIDELINES. Capacity Certification Flow Calculation Guidelines\r

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Page 1: Tie-in Manhole Facility ID GWINNETT COUNTY DEPARTMENT …...Page 4 of 4. GWINNETT COUNTY GRAVITY SEWER DESIGN FLOW CALCULATION GUIDELINES. Capacity Certification Flow Calculation Guidelines\r

• Average annual daily flow (GPD) based on attached guidelines (page 3-4)• Peak flow (GPM) for all commercial, mixed-use, and residential projects.• Instantaneous peak flow (GPM) for all industrial projects.

Design Professional

SUBMIT COMPLETED, SIGNED, SEALED FORM AND DOCUMENTS TO:

[email protected]

Gwinnett County Department of Water Resources 684 Winder Highway, Lawrenceville, GA 30045

_______ Tie-in Manhole Facility ID

_______ GIS map showing proposed development, surrounding utilities, and location of tie-in manhole.

_______ Proposed utility plan.

_______ Name of downstream pump station _______________________________________________________________________

SIGNED/SEALED: ________________________________________DATE: ____________________________________________

Page 1 of 4

GWINNETT COUNTY DEPARTMENT OF WATER RESOURCES SEWER CAPACITY CERTIFICATION REQUEST

DEVELOPMENT/PROJECT NAME: ___________________________________________________________________________________ DEVELOPMENT ADDRESS: _________________________________________(City) ______________________ (Zip) _______________ PARCEL NUMBER(S): _____________________________________________________________________________________________ PROPERTY OWNER NAME: ___________________________________________PHONE#: ___________________________________ PROPERTY OWNER EMAIL: ________________________________________________________________________________________

DEVELOPER NAME: ____________________________________________________________________________________________

ADDRESS: ________________________________________ (City/State) __________________________ (Zip) _________________

CONTACT NAME: ____________________________________________PHONE#: _______________________________________

DEVELOPER EMAIL: ______________________________________________________________________________________________

ENGINEERING FIRM: ____________________________________________________________________________________________

ADDRESS: _________________________________________ (City/State) __________________________ (Zip) __________________

CONTACT NAME: ____________________________________________PHONE#: _______________________________________

ENGINEER EMAIL: ______________________________________________________________________________________________

Requested Peak Flow(s) (GPM): ______________________________________________________________________

Tie-in Manhole Facility ID(s): ________________________________________________________________________Include the following items in your submittal package:

_______ Detailed flow calculations for proposed development/project.

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https://gis.gwinnettcounty.com/GISDataBrowser
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REV. 05/31/2019
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Professional Seal
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DWR Use Only: DWR Capacity Certification Request No. __________________________
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Select Request Type: ____ New Request ____ Revise Existing Request ____ Renew Expired Request Gwinnett County Planning and Development Permit No.: _________________________
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Division/Deputy Director, Department of Water Resources

Gwinnett County P&D Permit Number___________ G

Development/Project Name: ________________________________ _____________________________________

GWINNETT COUNTY DEPARTMENT OF WATER RESOURCES RECOMMENDATIONS

_____ APPROVED - Downstream sewer facilities have adequate capacity to accommodate projected flows.

_____ CONDITIONALLY APPROVED - Downstream sewer facilities can serve the proposed development/ project under the following conditions:

_____ DENIED - Due to the following:

SIGNED: _______________________________________________________ DATE: _________________________

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GWINNETT COUNTY GRAVITY SEWER DESIGN FLOW CALCULATION GUIDELINES
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GWINNETT COUNTY GRAVITY SEWER DESIGN FLOW CALCULATION GUIDELINES
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Capacity Certification Flow Calculation Guidelines
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1.Average Annual Daily Flow (AADF) for each land use from proposed development = (Number of units in proposed development) x AADF per unit per day
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2.AADF from proposed development = Sum of all land use flows from proposed development 3.Peak Flow (GPD) = 2.5 x AADF from proposed development 4.Convert Peak Flow to Gallons Per Minute (GPM): Peak Flow (GPM) = Peak Flow (GPD) / 1440
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