Longmont WC Plan 2008

• Project Type: Water Conservation Plan
• Contract/PO #: OE PDA 08-15
• Applicant: City of Longmont
• Project Name: City of Longmont Water Conservation Plan
• Title: City of Longmont Water Conservation Master Plan
• Date: 11/24/2008
• County: Boulder
• Water Conservation - Doc Type: Complete Plan

1,500,000
1,400,000
1,300,000
1,200,000
1,100, 000
1,000,000
900,000
0
ca 800,000
a�
700,000
0
0
° 600,000
500,000
400,000
300,000
200,000
100,000
0
APPENDIX B - DEMAND FORECASTING PROCEDURE
Small Commercial Historical Treated Metered Usage and Projections
*Total Small Commercial Usage
Small Commercial Forecast
-Linear (Total Small Commercial Usage)
y = 33499x - 7E +07
R2 = 0.9209
NM "T U')COI�MMO NM�U')Q0f`MMO NM�U')COI`MMO NM "T U')Q0I`MMO
M � 0 � 0 � 0 � M M M O � O � O � M M M M 0 � 0 � M M 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
IT- V_ V_ � V_ V_ V_ V_ � � V_ T_ V_ � � V_ V_ V_ N N N N N N N N N N N N N N N N N N N N N
Year
The rate of small commercial growth, based on the anticipated permits from 2007 to 2012, is
expected to slow down in the upcoming years.
Industrial
The City of Longmont has two industrial (large commercial) customers, a food processing
plant and a pharmaceutical company. Treated water use was forecasted for each customer
based on historical water use patterns and growth information provided by the company.
Actual annual water use was estimated for each separate industrial customer for the year
2006. Water use of the food processing plant has been relatively constant from 2002 to 2006
at an average of 217 million gallons annually, or approximately 0.59 million gallons per day.
Water use for the food processing plant was assumed to be constant for forecasting
purposes at 217 million gallons annually.
Water use for the pharmaceutical company was forecasted based on growth information
provided from the company to the City from 2007 to 2011. The growth trend for the next
five years was linear. This linear pattern was applied to subsequent years out to 2017 to
complete the industrial forecast. Forecasting was based on a starting value of 59 million
gallons annually for 2006 or approximately 0.22 million gallons per day.
Graphs summarizing industrial supporting data are provided below. Industrial use has
been decreasing in the past partially due to a decrease in the number of accounts. The two
remaining industrial clients anticipate growth in future years, and this must be accounted
for in the treated water forecast.
B -8