Castle Pines North Metropolitan District Integrated Water Resources Plan Community Meeting No. 1 November 7, 2005

Castle Pines North Metropolitan District

Integrated Water Resources Plan

Community Meeting No. 1

November 7, 2005

AgendaAgenda

1. Introductions

2. What is the Integrated Water Resources Plan?

3. Castle Pines North's Existing Water Supply and Demands

4.4. The IWRP Process The IWRP Process

5.5. Potential Supply OptionsPotential Supply Options

6. Upcoming Project Activities and Community Meetings

7. Questions and Comments

1. Introductions1. Introductions

Background on CDMBackground on CDM

A national engineering consulting firm 3,200 employees with 140 in Denver focus on water resources engineering

Recently completed Integrated Water Supply Plans for: Colorado Statewide Water Supply Initiative San Diego, Los Angeles, Santa Fe, San Antonio

CDM Recent Integrated Water Resources PlanningCDM Recent Integrated Water Resources Planning

Santa ClaraSanta ClaraValley WD IRPValley WD IRP

MetropolitanMetropolitanWater District IRPWater District IRP

City ofCity ofLos Angeles IRPLos Angeles IRP

City ofCity ofSan Diego IRPSan Diego IRP

ColoradoColoradoStatewide Water Statewide Water Supply InitiativeSupply Initiative

City ofCity ofSanta Fe IRPSanta Fe IRP

San AntonioSan AntonioWatershed PlanWatershed Plan

BECC (El Paso)BECC (El Paso)Bi-National Bi-National Water PlanWater Plan

Brazos River Brazos River Authority IRPAuthority IRP

AustinAustinWatershedWatershedMaster PlanMaster Plan

South Platte South Platte Decision Support Decision Support

SystemSystem

Northern NM Regional Northern NM Regional Groundwater ModelGroundwater Model

CDM Recent Water Demand and Conservation StudiesCDM Recent Water Demand and Conservation Studies

Santa ClaraSanta ClaraConservationConservation

EvaluationEvaluation

MWD Demand MWD Demand ForecastForecast

San DiegoSan DiegoDemand Forecast Demand Forecast & Conservation& Conservation

State of ColoradoState of ColoradoSWSI Demand SWSI Demand

ForecastForecast

Albuquerque Demand &Albuquerque Demand &Conservation StudyConservation StudyPhoenix Demand & Phoenix Demand &

Conservation Conservation EvaluationEvaluation

Las Vegas Demand & Las Vegas Demand & Conservation StudyConservation Study

El Paso Demand El Paso Demand ForecastForecast

Kelly AFBKelly AFBDemand ForecastDemand Forecast

Santa Fe Demand Santa Fe Demand ForecastForecast

2. What is the Integrated 2. What is the Integrated Water Resources Plan?Water Resources Plan?

Integrated Water Resources TasksIntegrated Water Resources Tasks

Evaluate past, current, and future water demand

Evaluate water conservation strategies

Evaluate long-term sustainability of the District's existing groundwater supply using a groundwater model

Evaluate other water supply options and find the optimum "grouping/portfolio" of options that best meets the needs of the community

Critical Tasks for SuccessCritical Tasks for Success

Assess current and future water demands Evaluate potential additional conservation measures Evaluate sustainability of existing groundwater

supply Develop plan for efficient use of existing wells and

groundwater Use proven alternatives analysis methods Evaluate potential sources of renewable water supply Explore partnering opportunities Develop a practical timetable for bringing on

renewable water supplies Implement a successful public outreach program

ScheduleSchedule

Task 1 – Future Water Demand ProjectionsTask 1 – Future Water Demand Projections

Task 2 – Water Conservation StrategiesTask 2 – Water Conservation Strategies

Task 3 – Groundwater Sustainability AnalysisTask 3 – Groundwater Sustainability Analysis

Task 4 – Prepare the Integrated Water Resources PlanTask 4 – Prepare the Integrated Water Resources Plan

Community InvolvementCommunity Involvement

SepSep OctOct NovNov DecDec JanJan FebFeb MarMar AprApr2 0 0 52 0 0 5 2 0 0 62 0 0 6

Community Meeting Dates

3. Castle Pines North's Water Supply3. Castle Pines North's Water Supply and Current Demandsand Current Demands

Existing SupplyExisting Supply

Groundwater is currently CPN's only source of water supply

CPN's existing groundwater supply is nonrenewable

Groundwater is not "running out" but it will cost more in the future if groundwater levels continue to decline

More wells, more energy needed to pump water at deeper levels, reduction in well yield, and higher maintenance costs

CPNMD

Denver Basin Aquifers

Dawson

Denver

Arapahoe

Laramie-Fox Hills

Alluvial

South-North Cross-section through CPNMDSouth-North Cross-section through CPNMD

NorthSouth

Dawson

Denver

Arapahoe

L-FH

Castle PinesNorth

Denver

Greeley

Laramie-Fox Hills

Arapah

oe

Denver

Dawson

Castle PinesNorth

West East

West-East Cross-section through CPNMDWest-East Cross-section through CPNMD

Next project step: Next project step: complete groundwater analysiscomplete groundwater analysis








CPN Monthly Water DemandsCPN Monthly Water Demands

0

50

100

150

200

250

300

350

400

Jan-99 Jan-00 Jan-01 Jan-02 Jan-03 Jan-04

Acr

e-ft

Summer Demands > 6x Winter Demands

Historic and Projected CPNMD Water DemandsHistoric and Projected CPNMD Water Demands

-

500

1,000

1,500

2,000

2,500

An

nu

al D

em

an

d (

ac

re-f

t)

Current CPNMD Water Demands by Customer Current CPNMD Water Demands by Customer TypeType

Residential use assumes watering every 3 days Residential use assumes watering every 3 days Total 2005 Demand = 1,897 acre-feetTotal 2005 Demand = 1,897 acre-feet

Schools1%

Commercial3%

Open Space Irrigation26%

Residential70%

Breakdown of Typical Residential Water Use*Breakdown of Typical Residential Water Use*

Toilet11% Clothes Washer

9%

Shower7%

Faucet6%

Outdoor58%

Other Indoor3%

Leaks6%

*AWWA Residential End Use Study

Regional Water Demands Regional Water Demands

Counties

GPC

D

2000 Per Capita Demands

The bottom line on our supply and demandThe bottom line on our supply and demand

CPN is nearing buildout, so future demands can be predicted

Groundwater is not "running out" but it will cost more in the future

Regional issue affecting Douglas and Arapahoe Counties.

IWRP to plan for the future

4. The IWRP Process4. The IWRP Process

The IWRP ChallengeThe IWRP Challenge

Existing situation Non-renewable groundwater supplies Declining water levels in area Increasing costs to maintain yields

Make efficient use of groundwater resources Drought reserve Extend life of aquifers Implement conjunctive use

Incorporate renewable supply options (surface water) Competition of limited resources Expensive Difficult to go it alone

Defining the GapDefining the Gap

20062006 20462046

YearYear

Dem

and

(AF/

YR)

Dem

and

(AF/

YR) Demand Demand

GapGap

Existing Reliable SuppliesExisting Reliable Supplies

Water Demand

Water Demand

Sustainability Definition – Context for Evaluating Sustainability Definition – Context for Evaluating Water Supply OptionsWater Supply Options

The CPNMD Board and Staff suggest sustainability be "no net long-term drawdown" in aquifer water levels

This means that aquifer water levels can fluctuate based on demands and availability of renewable supplies

Focus First On ObjectivesFocus First On Objectives

ObjectivesObjectives

PerformancePerformanceMeasuresMeasures

CompleteCompleteAlternativesAlternatives

OptionsOptions

Models/Models/ToolsTools

PreferredPreferredStrategyStrategy

"Why""Why" "How""How"• Surface water Surface water

storagestorage• More conservationMore conservation• Conjunctive useConjunctive use• Water treatmentWater treatment

• Provide reliabilityProvide reliability• Cost effectivenessCost effectiveness• Water QualityWater Quality

Alternatives Development & Evaluation ProcessAlternatives Development & Evaluation Process

• Show trade-offs Show trade-offs between alternativesbetween alternatives

• Identify common Identify common elements & phase-inelements & phase-in

• Develop Develop implementation implementation strategystrategy

Evaluate SupplyEvaluate SupplyAlternativesAlternatives

Evaluate SupplyEvaluate SupplyAlternativesAlternatives

• Establishes goalsEstablishes goals

• Helps define criteria Helps define criteria for which alternatives for which alternatives will be comparedwill be compared

DefineDefineObjectivesObjectives

DefineDefineObjectivesObjectives

• Identify all feasible Identify all feasible supply and demand-supply and demand-management optionsmanagement options

• Rank options & Rank options & combine into combine into alternativesalternatives

Build SupplyBuild SupplyAlternativesAlternatives

Build SupplyBuild SupplyAlternativesAlternatives

• Identify stakeholdersIdentify stakeholders

• Identify and Identify and incorporate "risk" into incorporate "risk" into decision makingdecision making

• Evaluate partnering Evaluate partnering opportunitiesopportunities

Develop EvaluationDevelop EvaluationFrameworkFramework

Develop EvaluationDevelop EvaluationFrameworkFramework

ObjectivesObjectives

ObjectiveObjective DescriptionDescription

Manage costs Cost of construction, O&M; likelihood of outside funding

Improve reliability Minimize risks of shortage; local control of supply

Long-term sustainability Sustainable use of groundwater resources

Technical implementability Likelihood of supply development, quality of supply, and compatibility with existing water system

Protect the environment Protection of land and water habitats, cultural and social resources, and aesthetic resources

Acceptability Political, institutional, &regulatory acceptability; permitting

Timely implementation Ability to implement solutions by the time they are needed

Maintain acceptable quality of life

Maintain quality of life with respect to green spaces, etc.

Water quality Provide treated water quality that meets or exceeds standards and its taste is aesthetically pleasing

The IWRP will build integrated alternativesThe IWRP will build integrated alternatives

Surfacewater

Ground-water

Ag Transfers

ReuseStorageConser-vation

Surfacewater

Ground-water

Storage

ReuseConserv..

Portfolio 1Portfolio 1

Ground-water

Storage

Reuse

Conserv.


Ground-water

Storage

ReuseConserv.


AgTransfers

Pro

ject

ed

Dem

and

5. Potential Supply Options5. Potential Supply Options

Conservation: Current MeasuresConservation: Current Measures

Water Restrictions 2003 – began watering limited to every 3rd day. Balances system demands and reduces peak day.

Water Rates Historically a tiered system 2004 – began budget water based on lot size and a 4-5

tiered block rate system based on usage Rebates for Retrofits

Program began in 2003 Public Education

Formal process began in 2003

Castle Pines North Rebate ProgramCastle Pines North Rebate Program

ItemItem Benefit/SavingsBenefit/Savings RebateRebate

Rain Sensors Overrides irrigation system by detecting rainfall

$100

(Limit one per household)

Programmable Irrigation Clock

Sets time limits to help conserve water

$75


Low Flow Toilets Uses 1.6 gallons per flush; Old toilets use three to five gallons per flush

$100

(Limit three per household)

Front Loading Washing Machines

Uses 20 gallons per load; Horizontal machines use 45 gallons per load

$125

Hot Water Recirculation System (began 2005)

Delivers hot water to fixtures quickly $100


Tankless Hot Water Heaters (not sure when began)

Only heats water as it is used $100


*Source: CPN Website

Conservation Potential Conservation Potential

Indoor Conservation Potential Limited - mostly for newer homes Up to approx 100 AF/Yr for residential Total Commercial use <5% of build-out demand

Residential Outdoor Conservation Potential Rate structure & budget allocation provide incentives for efficiency Rate structure can potentially be optimized for additional savings Additional savings likely through permanent landscape changes

Open Space Irrigation Conservation Potential Additional savings likely through permanent landscape changes

Potential Sources of Renewable SuppliesPotential Sources of Renewable Supplies

Colorado River BasinTransbasin deliveries from Upper Blue River to Upper South Platte with Combined Storage and Pipeline

Upper Arkansas RiverWater rts acquisition with storage and pipeline to Upper South Platte Drainage

Upper South Platte BasinWater rts acquisition with storage and pipeline

Lower Arkansas River BasinFallowing and water rts acquisition with storage and pipeline

Lower South PlatteFallowing program and water rts acquisition, gravel pit storage and pipeline

Upper Cherry Ck and Plum CkWater rts acquisition with storage & pipeline

Rueter-Hess Reservoir

310,000

4,500,000

1,530,000

560,000

510,000

1,780,000 320,000

110,000 400,000

164,000

YAMPAYAMPA

WHITEWHITE

COLORADOCOLORADO

GUNNISON

GUNNISONDO

LOR

ESD

OLO

RES SA

N JU

AN

SAN

JUA

N

ARKANSASARKANSAS

SOUTH PLATTESOUTH PLATTE

N. PLATTEN. PLATTE LARAMIELARAMIE

RIO GRANDE

RIO GRANDEWEST SLOPEWEST SLOPEIrrigated Acres:880,000

EAST SLOPEEAST SLOPEIrrigated Acres:2,270,000

Year 2000 Statewide Flows and Irrigated Acres

State of Colorado Year 2000 Agricultural, M&I and Self-supplied Industrial Water Demands

2%

1%

97%

M&I

Self-supplied

Agricultural

West Slope

12%

2%

86%

M&I

Self-supplied

Agricultural

East Slope

Example of Combined Surface and Ground Example of Combined Surface and Ground Water Use for CPNMDWater Use for CPNMD

Future Future DemandDemand

Current Current DemandDemand

PRO

DU

CTI

ON

PRO

DU

CTI

ON

GW

CurrentCurrent AverageAverage Wet YearWet Year Dry YearDry Year

GW

SW

CONDITIONSCONDITIONS

GW

SWGW

SWSW SourcesGW from recharge Non-renewable GWRecharge to GW

Storage: Chatfield, Rueter-HessStorage: Chatfield, Rueter-Hess

http://wms1.earthcam.com/parker

6. Upcoming IWRP Project Activities 6. Upcoming IWRP Project Activities and Community Meetingsand Community Meetings

ScheduleSchedule








Content & Objectives of Each Community MeetingContent & Objectives of Each Community Meeting

Meeting No. 1 – November 7, 2005 Introduce IWRP Overview of supply and demands

Meeting No. 2 – January 23, 2006 Provide results of groundwater analysis Present preliminary alternatives

Meeting No. 3 – March - April 2006 Present IWRP Discuss recommended alternatives

For additional information or to For additional information or to provide comments:provide comments:

• Contact:Contact:Castle Pines North Metro DistrictJames McGrady, District Manager

303-688-8550, ext. [email protected]

• Visit:the CPNMD web site

http://www.cpnmd.org

7. Questions, Comments, Input?7. Questions, Comments, Input?

Documents

Castle Pines North Metropolitan District Integrated Water Resources Plan Community Meeting No. 1 November 7, 2005