Erie Non-Potable Water Master Plan Presented at the Rocky Mountain - - PowerPoint PPT Presentation

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Erie Non-Potable Water Master Plan Presented at the Rocky Mountain - - PowerPoint PPT Presentation

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Erie Non-Potable Water Master Plan Presented at the Rocky Mountain Water Reuse Workshop August 14, 2014 Presented by Matt Bliss, DiNatale Water Consultants 1 Introduction Erie was incorporated in 1874 - coal mining town Eries

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Erie Non-Potable Water Master Plan

Presented at the Rocky Mountain Water Reuse Workshop

August 14, 2014 Presented by Matt Bliss, DiNatale Water Consultants

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Introduction

Rocky Mountain Water Reuse Workshop August 14, 2014

  • Erie was incorporated in 1874 -

coal mining town

  • Erie’s population grew 1,258 to

18,135 from 1990 to 2010 (US Census Data)

  • Erie’s Comprehensive Planning

Area encompasses more than 40 square miles

  • Several active developments in

Erie today

Map from coloradodirectory.com

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Acknowledgments

Rocky Mountain Water Reuse Workshop August 14, 2014

  • Valuable information, data, insight, edits and suggestions provided

by Town of Erie staff:

  • Gary Behlen (Director of Public Works)
  • Russell Pennington (Deputy Director of Public Works)
  • Wendi Palmer (Civil Engineer)
  • Jodi Lambert (Operations and Maintenance Director)
  • Jon Mays (Water and Wastewater Operations Manager)
  • Paul Reed (Assistant Parks Superintendent)
  • Paul Zilis (Erie’s water attorney)
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Goals and Objectives

Rocky Mountain Water Reuse Workshop August 14, 2014

  • DiNatale Water Consultants (DWC) Updated the 2007 Non-Potable

Water Master Plan

  • Goals and Objectives of the updated Plan
  • 1. Update water supply portfolio and quantify availability of

non-potable water

  • 2. Quantify demands of areas that could reasonably be

developed and served by non-potable water in short- to mid- term planning horizons

  • 3. Develop an infrastructure layout
  • 4. Model system operations
  • 5. Provide estimate of cost
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Current System

  • North Water Reclamation

Facility Reg 84 reclamation facility

  • 1,000 AF reclaimed

reservoir

  • Reuse pump station and

pipeline constructed

  • Pipeline currently ends

near Historic Erie

  • Has not yet been used to

deliver reuse water

Rocky Mountain Water Reuse Workshop August 14, 2014

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Current System

Rocky Mountain Water Reuse Workshop August 14, 2014

  • Several irrigation ditches run

through Erie – Erie owns shares in four of them

  • Ditch water currently used to

irrigate Erie Community Park

  • Colorado National Golf

Course irrigates by using Erie’s consumable effluent by exchange on Coal Creek

  • Average use 400 AFY
  • Most parks use potable

water

Erie Community Center Colorado Nat. Golf Couse

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Non-Potable Water Availability

Water Source

  • Avg. Yield

(AF) Non-Potable Use Reuse C-BT 5,200 Yes No Windy Gap 1,400 Yes Yes NISP 6,500 (future) Yes Partial

  • Irrig. Ditches

1,300 Yes Partial

  • Use of Windy Gap supplies primarily in the winter, can reclaim nearly

95% of Windy Gap supplies

  • C-BT supplies cannot be re-used – first use only
  • NISP has a reusable component and a first-use only component
  • Ditch water can be used on historically irrigated lands without water

rights change. Some shares have been changed and CU can be reused

Rocky Mountain Water Reuse Workshop August 14, 2014

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Non-Potable Water Availability Water Supply Variability

  • C-BT and Ditch supplies are

highly variable by year

  • Use raw water for non-

potable demands in above-average years

  • Use reclaimed water in

below average years

Erie’s NP Demands

Raw Water Supply Reclaimed Water Supply

Benefits

  • Raw water can flush

accumulated salts from use of reclaimed water

  • Built-in redundancy for

non-potable system with two water sources

Rocky Mountain Water Reuse Workshop August 14, 2014

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Non-Potable Demands

  • Current potable and non-

potable use on parks and golf course quantified

  • Future demands

estimated from Unified Development Code (UDC) and existing Erie rights-

  • f-way
  • UDC and existing rights-of-way analysis resulted in 0.23 AF of non-

potable demand per raw acre of developed land

  • Dual-use system on individual lots not considered for short and mid-

term planning horizons

Aerial view of landscaped rights-of-way in Erie (Arapahoe Ridge)

Rocky Mountain Water Reuse Workshop August 14, 2014

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Non-Potable Demands

  • Planned future

development areas identified with Erie Staff

  • Non-potable demands

estimated based on the 0.23 AF per acre of development

  • Additional 25% added

for additional NP customers

  • Near to Mid Term NP

Demand: 2,100 AFY

Rocky Mountain Water Reuse Workshop August 14, 2014

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Infrastructure Plan 5-Phase Infrastructure Plan:

1. Low-hanging fruit - parks and developments near existing line and new larger development (Collier’s Hill) 2. North line – serves northern service area and I-25 corridor 3. Southern extension with connection to current irrigation pond for Erie Community Park and direct connect to Colorado National Golf Course 4. Interconnection of reclaimed system with raw water system near existing water treatment plant 5. Loop system with Northern Line and Collier’s Hill line

Rocky Mountain Water Reuse Workshop August 14, 2014

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Infrastructure Schematic (Existing)

HEADING

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Existing System:

  • Raw water supply to Erie

Community Park

  • Reuse by exchange at golf

course

  • Reclaimed water reservoir,

pump station, and pipeline

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Infrastructure Schematic (Through Phase 1)

HEADING

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  • Connection to

developments near existing line

  • Extension to

Collier’s Hill (now being built)

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Infrastructure Schematic (Through Phase 2)

HEADING

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  • North Line

serves north and 1-25 corridor

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Infrastructure Schematic (Through Phase 3)

HEADING

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  • South Line

extension

  • Inter-connect

with ECC pond

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Infrastructure Schematic (Through Phase 4)

HEADING

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  • West Line

extension

  • Inter-connect with

raw water system

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Infrastructure Schematic (Through Phase 5)

HEADING

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  • Loop system at

North Line and Collier’s Hill Line

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Design Considerations

Storage Ponds that fill during the day Direct Connection to Irrigation System

  • Irrigate 10 hours per day

(e.g. 10pm to 8am)

  • Utilizes 42% of system

capacity

  • Fill ponds during the day,

irrigate at night

  • Utilizes 100% of system

capacity

Rocky Mountain Water Reuse Workshop August 14, 2014

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Design Considerations

  • Peak-Week demand estimated

from turf-grass ET rates and 60% application efficiency

  • 10% of annual demand
  • 3 inches for turf
  • Reservoir model used to size

smaller storage distribution ponds

  • Pipe sizes based on meeting

peak-week demand with mix of direct-connect and pond- connected customers

7-day water demand for bluegrass from NCWCD climate data (inches)

Rocky Mountain Water Reuse Workshop August 14, 2014

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Design Considerations

  • System not designed for all users to turn
  • n at once
  • User rules and regulation must be

implemented, including scheduled irrigation times by customer and volumetric limits

  • SCADA system can provide Erie operators

with central control of valves, pumps, irrigation schedules etc…

  • Real-time remote monitoring of non-

potable meters can provide quick feedback into user behavior and assist with scheduling compliance

Rocky Mountain Water Reuse Workshop August 14, 2014

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System Layout

HEADING For each phase:

  • Pipe size
  • Conceptual

alignment

  • Identification of

subdivision(s) served

  • Pipe size
  • Storage ponds

and sizes

  • Pump locations
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System Layout

For each development area or subdivision

  • Details on phasing
  • Water supply type

(ditch use, raw supply, reclaimed supply, or both)

  • ther supply or

layout options Elevation profiles along conceptual pipe alignments to guide final design of infrastructure

Rocky Mountain Water Reuse Workshop August 14, 2014

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Operational Modeling

Spreadsheet model developed to assess:

  • Timing and amount of non-potable water

availability

  • Timing and amount of non-potable demand
  • Reclaimed reservoir operations
  • Multiple water supply scenarios modeled

(current and future system, normal and drought years)

  • Outputs demonstrate how demand is met

and how to optimize supply

  • Flexible modeling tool that can be used to

simulate a variety of potential future conditions or test different infrastructure configurations

Rocky Mountain Water Reuse Workshop August 14, 2014

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Operational Modeling

HEADING

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Cost Estimate

Phase Description Capital Cost 1 Extension of existing line to Collier’s Hill, storage pond, connection to nearby parks and developments $2,250,000 2 North Line to service north area and I-25 Corridor $4,100,000 3 South extension to Vista Ridge area $3,500,000 4 Interconnect with raw water system $3,300,000 5 Loop North Line with Collier’s Hill line $800,000 Total $13,950,000

1,700 to 2,100 AF of demand: $6,700 to $8,200 per AF Compare to $20,000+ per AF of new supply

Rocky Mountain Water Reuse Workshop August 14, 2014

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Non-Potable Water Demand

Thank you! Questions?

Rocky Mountain Water Reuse Workshop August 14, 2014