Erie WC Plan2008

• Project Type: Water Conservation Plan
• Applicant: Town of Erie
• Project Name: Town of Erie Water Conservation Plan
• Title: Erie Water Conservation Plan
• Date: 1/1/2008
• County: Boulder
• Water Conservation - Doc Type: Complete Plan

CDNI

Section 2
Profile of Existing Water System

Table 2-2 2007 Water System Profile

Service Characteristics I Value
Prepared a
Planning Plan Completion Date Filed with State
Northern Integrated Supply Plan Participant in regional I n process of EIS document
plan completing final phase
Windy Gap Firming Project Participant in regional I n process of EIS document
plan completing final phase
Potable Water Master Plan Yes March 2007 No
Non-potable Water Master Plan I n process Spring 2007 No
Drought or emergency plan No No No
Water Conservation Plan This Document June 2007 Will be filed

* This does not include use of reclaimed water. Section 2.6 provides more information.
** Average-year water right yields. See Table 2-3.

2.2 Sources of Water

Erie's water supply portfolio consists of a variety of surface water supplies. This
includes reservoir, ditch, CBT, and Windy Gap water rights with a total average year
yield of 7,022 acre-feet per year (AFY). Table 2-3 shows Erie's current water supply
portfolio. These supplies provide an adequate amount of water to meet current needs.
However, additional water rights will be needed to meet future demands.

Table 2-3 Erie's Existing Water Rights, November 2006

Average I Average I Dry Year I Dry Year
I No. of Shares I Annual Yield Annual Yield Annual Yield Annual Yield
Water Right Name or Units Owned (AF/share) (AF) (AF/share) (AF)
Transbasin Sources
CBT - Variable Quota 6,503 0.7 4,552 1 6,503
CBT - Fixed Quota 190 0.7 133 0.6 114
Subtotal CBT 6,693 n/a 4,685 n/a 6,617
Windy Gap Project 14 50 700 0 0
Subtotal 6,707 n/a 6,085 n/a 6,617
Reservoir Storage
Erie Reservoir 239 1.0 239 0.3 72
Prince Reservoir 80 1.0 80 0.3 24
Thomas Reservoir 148 1.0 148 0 0
Subtotal 467 n/a 467 n/a 96
Mutual Irrigation Company Ownership
Leyner Cottonwood Ditch 294 0.54 158 0.21 62
South Boulder Canyon Ditch 203 2.9 589 0 0
Erie Coal Creek Ditch and 83 4.9 407 0.56 46
Reservoir Co.
FRICO - Marshall Lake Div. 4 4 16 0.5 2
Subtotal 584 n/a 1,170 n/a 110
Total 7,758 n/a 7,022 n/a 6,823

As shown in Table 2-3, Erie's existing ditch water rights yield approximately
1,170 AFY in an average year and 110 AFY in a dry year. The use of raw ditch water is
advantageous over using treated potable water for irrigation in that ditch water rights
used for irrigation may not need to be converted to municipal use, ditch water
requires no treatment (providing economic savings), and unlike direct use of
reclaimed wastewater, ditch water is not subject to the provisions of Colorado's reuse

2-5

\\DENSVR1\PROJECTS\9228 - ERIE\59443 - CONSERVATION PLAN\REPORT\FINAL DRAFT\SECTION 2.DOC