SAWS WATER PROJECTS MODELING CRITERIA GUIDELINES

July 2016

2800 U.S. Highway 281 North

San Antonio, Texas 78212

Modeling Criteria Guidelines, July 2016

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TABLE OF CONTENTS

MODELING CRITERIA GUIDELINES FOR SAWS WATER PROJECTS............................................. 3 HYDRAULIC GRADE LINE REQUEST FORM......................................................................... 3 DEVELOPER PROCESS FOR SUBMITTING A HYDRAULIC MODEL ....................................... 3

APPENDIX A - HYDRAULIC GRADE LEVEL MAP.…………………….................................................. 5 APPENDIX B - EXAMPLE OF HYDRAULIC MODEL INPUTS......................................................... 6 APPENDIX C - EXAMPLE OF HYDRAULIC MODEL OUTPUTS...................................................... 8

Modeling Criteria Guidelines, July 2016

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Modeling Criteria Guidelines for SAWS Water Projects

Hydraulic Grade Line Request Form

• Date • Project Name • Location Map - must include boundary of development tract and proposed connection point

to existing water main • Location of Development - if an address cannot be provided, then the closest street

intersection and intersection corner will need to be provided • Engineer’s contact name, company, phone number, fax number, mailing address and e-mail

address • EDU’s by Pressure Zone • Fire Flow Requirement @ 25 psi • Type of Development: Commercial/Industrial, Residential/Apartment • Comments

Developer Process for Submitting a Hydraulic Model

• Obtain the Pressure Zone static gradient for the development (Appendix A) • Provide Development Master Plan reflecting roads, development densities, pressure zone

limits, development units and contours with labels • Provide development unit schedule by years with estimated service requirements (EDU’s) by

development unit per year • Provide information on fire flow requirements for each development unit, per COSA adopted

Fire Code and Local amendments, and SAWS’ Development criteria • Submit hydraulic model using the criteria stated in Chapter 9 of the Utility Service Regulations

and identify the software version used for the hydraulic model • Submit the following to SAWS for review:

a. Master Water Plan Exhibit to show the following:

Water pipe layout of the development

Unit or sub-development boundary limits

Road alignments

All anticipated water easements

Pressure Zone boundary line(s)

Contours with labels

Pipe size(s) and location

Fire hydrant locations – state if existing or proposed

Connection point(s) to existing SAWS/District Special Project (DSP) water main

All proposed water infrastructure required to serve the proposed development including, but not limited to; tanks, wells, pumps, etc.

b. Hydraulic Model Input Data (Appendix B) associated with the above map shall include the following:

Establish scenarios by unit(s), when applicable. Scenarios should include domestic demands and fire flow evaluations for all areas within each scenario. One scenario shall reflect completed development of all units at full build-out.

Pipe – diameter, pipe length, C factor

Fire hydrant – existing and proposed with elevation and demand value

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Junction – ground elevation and demand value

Connection point(s) to SAWS/DSP water line – ground elevation and hydraulic grade line

Tanks – hydraulic grade line, volume, ground surface elevation, configuration (ground storage or elevated storage)

Pumps – design point (flow and total dynamic head) or a pump curve, ground surface elevations, firm and ultimate capacities

Wells – sustainable yield

c. Hydraulic Model Output (Appendix C) associated with the above map shall be legible and include the following:

Provide data result tables and graphic exhibits for each scenario

Data Result/Output Tables • Pipe – domestic flow velocity and head loss for each scenario • Fire hydrant – residual pressure under fire flow conditions • Junction – pressure for domestic • Connection Point(s) to SAWS/DSP water line – pressure/hydraulic grade line for domestic • Tanks – fill/drain rate • Pumps – flow from each pump

Exhibits – to be provided for each scenario • Pipe – size, show labels, domestic flow direction and velocities • Node – show labels, domestic condition pressures, estimated fire flow values, identify node(s) with minimum pressure that control fire flows throughout the development piping network. Junction locations must include the lowest and highest ground elevations where the proposed pipe will be located. If the proposed pipe has a dead-end, then the length from previous junction to the end of pipe along with pipe diameter must be stated. • Pumps, tanks, wells – show labels, provide graphs of flow rates, water levels, etc. as part of the scenario summary • Fire hydrants – show label, estimated fire flow values for mains at those locations • Model ID’s shall be labeled on the exhibit and legible.

Summary of findings

d. Engineering Report shall include the following:

A brief summary of the development

A brief description of development schedule reflecting service requirements by year and by units

Summary of scenario descriptions

Summary of scenario modeling results

Available fire flow based on existing and proposed infrastructure

Provide recommendations, if any, for potential oversizing of mains or facilities

Exhibits printed on sizes that are easily readable and clearly illustrate required output data and results (tables, etc.) for hydraulic model

A CD with appropriate dwg, dgn, shp files as noted above, with the complete Master Water Plan included.

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HGL (ft) PZ Max Ground Elev (ft) Min Ground Elev (ft) 730 730 601 530750 2 620 420790 790 661 490823 823 708 654828 3 700 580830 830 720 472837 4B 720 630846 4A 730 630910 910 756 692920 920 760 632930 4 800 680950 4C, 950E, 950W 850 608994 5, 5A 870 760

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Appendix A - Hydraulic Gradient Level Map

µCreated: July 2016

Appendix B - Example of Hydraulic Model Inputs Note: The following examples should be used more as a reference due to varying hydraulic modeling software having different layout styles for model inputs.

Pipe:

Junction:

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Appendix B (continued) Note: The following examples should be used more as a reference due to varying hydraulic modeling software having different layout styles for model inputs.

Tank:

Pump:

Well:

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Appendix C - Example of Hydraulic Model Outputs Note: The following examples should be used more as a reference due to varying hydraulic modeling software having different layout styles for model outputs.

Pipes:

Junctions: