Culverts

  • City of Jerome uses HDPE or CMP, not RCP
  • Treasure Valley Pipe
    • Doug Brown, 208-733-4188, dbrown@tvpipe.us
    • Stock 36“ CMP in 20' and 24' lengths at a cost of $31.60 per foot
    • Connecting bands are $63.20 each

Mannings Equation

Concrete Pipe

Corrugated Metal Pipe (CMP)

Sales - Contech

  • Andy Clark, Sales Engineer, 208-220-8684, aclark@conteches.com
  • Ben Hurst, Engineering Manager, 513-645-7501, bhurst@conteches.com
    • Paige Chapman, PChapman@conteches.com provides design engineering support for Washington, Oregon, Idaho and Utah
    • Erik Early, EEarly@conteches.com provides design engineering support for California, Nevada, and Arizona

Purpose

  • “Water mains must provide adequate maximum day demand, peak hour demand, and maximum day plus fire flow pressures.” (City of North Las Vegas - Network Hydraulic Analysis Guidelines)
  • Maximum Day Demand - The maximum daily demand for water over a one-year period, as determined by historical data (UDACS 2010, 1.01.90)
  • Peak Hour Demand - The volume of water which must be supplied by a public water system to meet the greatest demand per hour of its customers for any hour during a yearly period.“ (UDACS 2010, 1.01.101)
  • Reduced Pressure Principle Assembly (RPPA) - for domestic/irrigation applications
  • Reduced Pressure Detector Assembly (RPDA) - backflow prevention for fire sprinklers
  • “For all commercial developments, installation of a RPPA (domestic/irrigation) or RPDA (fire) is required. For the current approved RPPA & RPDA listings, please refer to the Approved Materials List (AML)” (see City of North Las Vegas - Network Hydraulic Analysis Guidelines).

Forms - North Las Vegas

Fees

  • North Las Vegas - according to Quang Phan, just pay the $50 application fee when submitting plans, then at the final mylar stage, North Las Vegas staff will determine all fees to be paid. This saves time, running back and forth with the developer asking for checks.
  • Clark County Fire Prevention Bureau
  • City of North Las Vegas - Plan Check Fee
    • obtained from completed Bond and Fee Estimate (B&F Est.)
  • City of North Las Vegas - Water Service Application Fee
  • State of Nevada - Division of Water Resources Fee (5 acre feet) make payable to City of North Las Vegas
  • Clark County
  • NDOT

Hydraulic Analysis Report

0 - General Info

  • requirements found in UDACS 2.03 Hydraulic Analyses
  • must provide two copies of the hydraulic analysis report to reviewing agency
  • each page of the submittal must be numbered

Submittal Process and Requirements

  • NLV - submit 2 copies of hydraulic analysis report with 2 copies of the Utilities Plan

1 - Report Cover

  • “The name, address, telephone number and fax number of the engineering consultant, developer, and developer's contact person must be identified on the cover of the report.” (UDACS, p. 2-4)

2 - Stamped Submittal Letter

  • Typically on company letterhead
  • “The hydraulic analyses must be signed and sealed by a professional engineer licensed in the State of Nevada.” (UDACS 2.03.02 - General, p. 2-4)

3 - Report

  • Name and version of hydraulic analyses software
  • Type of Project - as noted on the “Hydraulic Grade Line Request Form” which has a list of developments.
    • Single Family Residential
    • Residential Duplex & Triplex
    • Apartments, Condos, Townhouses
    • Mobile Home Parks
    • Hotels
    • Golf Course, Park, Open Spaces
    • Industrial Park (light industrial)
    • Commercial
    • Schools
    • Others

1.0 Introduction

2.0 Project Location and Description

  • Location of Project - see Appendix A-1 for map

3.0 On-Site Water Demands

  • Commercial (see Appendix A-4 Estimate of Water Demand). Note this is just the typical Commercial demand and will be different if you have a specific requirement, such as farm or green house and the use requires more water. So, on the Hydraulic Grade Line Request Form, requesting Maximum Daily Demand of 50 gpm instead of the A-4 estimate of 3.0 gpm, then on Peak Hour Demand want 75 gpm instead of the A-4 estimate of 4.6 gpm.
    • Maximum Day is 3.0 gpm/acre
    • Peak Hour is 4.6 gpm/acre
    • Fire-Flow Demand is 1500 gpm (see Appendix A-3 Fire-Flow Determination)
Mechanical Engineer
  • Lance Griffith, lg@eefire.com, mobile 702-400-1041, work 702-365-8273

4.0 Off-Site Water Demands

5.0 Static Pressures

  • Water conversion: 1 psi = 2.31 ft of water
  • Static Pressure (psi) = (Pressure Zone - Finish Floor Elevation) / 2.31 ft of water
  • If Static Pressure > 80 psi, then need to install a pressure reducing valve (see UDACS 2.01.02 and LVVWD High Water Pressure
    • “This property has static water pressure in excess of 80 psi. The Uniform Plumbing Code requires that individual, on-site (private), pressure-reducing valves (PRV) must be installed whenever the pressure exceeds 80 psi. PRV's are the Developer's responsibility, and will not be inspected or included in the acceptance of CNLV facilities.”

5.0 Hydraulic Analysis using EPANET

  • Need 3 different EPANET files, 1-Max Day, 2-Peak Hour, and 3-Max Day + Fire Flow
  • Step 1 - Reservoirs - just enter the Total Head (HGL) as given by the Agency, see Appendix A-2. EPANET requires at least one reservoir to run analysis.
  • Step 2 - Junction/Nodes - enter surface elevations from the grading plan, not invert elevations of the pipe (which is often unknown). Site on Nellis and Cheyenne is very flat, so using the top of curb (TC) elevation of the existing fire hydrant for all junctions/nodes (i.e. water meter/RPPA and RPDA fire)
    • Enter TC elevation
    • Enter Base Demand
      • Water Demand, see City of North Las Vegas flow rates table, Appendix A-4 Estimate of Water Demand for Maximum Day and Peak Hour.
      • Water Meter Node = all domestic Water Demand * Lot Area
      • Water Meter Node (Max Day and Max Day + Fire Flow) = 3.0 gpm/acre * 2.11 acre = 6.33 gpm
      • Water Meter Node (Peak Hour) = 4.6 gpm/acre * 2.11 acre = 9.71 gpm
      • RPDA Node (Max Day + Fire Flow only, otherwise just 0 gpm) = 500 gpm
      • Fire Hydrant Node (Max Day + Fire Flow only, otherwise just 0 gpm) = 1000 gpm
      • All other Nodes/Junctions have 0 gpm for Demand
  • Step 3 - Pipes
    • enter pipe length in feet from the grading plan
    • enter pipe diameter in inches
    • Roughness is 120 (=12“ diameter) or 130 (=14” diameter) (see UDACS p. 2-6)
  • Step 4 - Pipe to Building
    • include onsite pipe to sprinkler and show the pressure at the proposed building
  • Lowest Pressure from EPANET (psi) - Max Pressure Loss from Meter (psi) - Max Pressure Loss from RPDA or RPPA (psi)
    • must be = 45 psi for static pressure (see UDACS p. 2-1)
    • must be = 40 psi for maximum day (see UDACS p. 2-1)
    • must be = 30 psi for peak hour (see UDACS p. 2-1)
    • must be = 20 psi for maximum day + fire flow (see UDACS p. 2-1)

6.0 Results

  • Summary table of EPANET analysis showing results of minimum and maximum pressures for maximum day, peak hour, and maximum day plus fire.

7.0 Conclusion and Recommendations

4 - Appendix A

A1 - Vicinity Map (Assessor's Parcel Map)

  • Example URL if you know the first 5 numbers of the Assessor Parcel Number (APN)
  • Adobe Acrobat 9 Professional
    • Make Acrobat 9 the default program to a open PDF (use Windows Explorer, right click to select a PDF, then Open With ? Choose default program…
    • Edit > Preferences > Internet category > uncheck <b>Display PDF in browser</b>
    • Edit > Preferences > TouchUp category > check <b>Enable Text Word Wrapping</b>
    • Comments > Comment & Markup Tools > Callout Tool to add callout showing the label PROJECT SITE
    • Print PDF using scale to fit option, remember Assessor Maps are 11×17 size, so want to scale to 8.5×11 so it easily fits in the report and most likely the reviewers won't even look at it anyway.
      • Printing Assessor Map on 8.5x11 paper

A2 - Agency Hydraulic Grade Line Request Form

Hydraulic Grade Line Request Form

A3 - Fire-Flow Determination

International Building Code (IBC) - Types of Construction Definitions
International Fire Code (IFC) - Fire Resistance Rating
  • International Building Code 2012 - Types of Construction
International Fire Code (IFC) - Fire-Flow Requirements for Buildings

A4 Estimate Water Demand

A5 UDACS Table A

  • UDACS Table A - Domestic Water Meter Chart, p. 4-1

A6 UDACS Table C

  • UDACS Table C - Backflow Prevention Assembly Characteristics, p. 4-3

5 - Appendix B - EPANET Reports

  • Recommend taking screen shots showing Network Schematic, Analysis Results Table - Nodes/Junctions, Analysis Results Table - Links

B1 Network Layout Map

  • Development Network Map

B2 EPANET - Network Schematic

  • EPANET - Add Notation Labels
  • Table - Nodes - Columns (Report > Options)
    • Elevation
    • Base Demand
    • Demand
    • Head
    • Pressure
  • Table - Links - Columns (Report > Options)
    • Length
    • Diameter
    • Roughness
    • Flow (GPM)
    • Velocity (fps)
    • Friction Factor

B3 EPANET - Max Day Analysis

  • EPANET - Max Day Analysis with Network Schematic

B4 EPANET - Peak Hour Analysis

  • EPANET - Peak Hour Analysis with Network Schematic

B5 EPANET - Max Day + Fire Flow Analysis

  • EPANET - Max Day + Fire Flow Analysis with Network Schematic

EPA NET

6 - Appendix C - Agency Requirements

C1 UDACS 2.03 Hydraulic Analyses Requirements

C2 City of North Las Vegas - Network Hydraulic Analysis Guidelines

C2 Las Vegas Valley Water District

Review Addendums

  • Submit two copies of addendum (including grading plan) along with red-lines.
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