Northglenn 2005 WCPlan

• Project Type: Water Conservation Plan
• Applicant: City of Northglenn
• Title: City of Northglenn Water Conservation Plan July, 2005
• County: Adams
• Water Conservation - Doc Type: Complete Plan

City of North glenn Water Conservation Plan

Jefferson County. The firm yield for all of the City's water rights currently
owned is estimated at 2,900 af.

Berthoud Pass Ditch diverts water from the Frasier River Basin, through
Berthoud Pass Tunnel to Hoop Creek which flows into Clear Creek. This water
can be diverted from May 15 to October 15 and is principally delivered via the
Church Ditch. The City of Golden co-owns the Berthoud Pass Ditch with the
City of Northglenn and shares in its water right. The City of Northglenn owns
18% of the total Church Ditch inches and is two-thirds owner of the ditch
structure itself. Ownership of the structure allows Northglenn to use Church
Ditch to deliver its Berthoud Pass water as well as its Church Ditch inches. The
Church Ditch operating season is April 1 through October 31.

In addition, the City of North glenn has junior water rights on Clear Creek during
"free river" conditions. Free river conditions imply that the flow in the river is
high, all senior water rights are being met, and no call on the river exists. During
drought, the flow in most rivers is low and the call is too senior to allow the City
to divert these rights.

Northg1enn has insufficient water supplies to meet drought year demands. In
1976, Northglenn developed an innovative agricultural/municipal partnership to
enhance the City's water supplies. The NorthglennfFRICO (Farmer Reservoir
and Irrigation Company) exchange gives the City the first use of agricultural
supplies in Standley Lake and the City returns treated effluent and a 10% bonus
to the irrigators. This agreement has effectively extended Northglenn's supplies
by the amount exchanged without requiring the City to purchase water rights or
expand storage.

In order to meet 2003 drought demands, Northglenn borrowed 1,800 af of
agricultural supplies and also imposed mandatory outdoor watering restrictions.
The amount ofFRICO agricultural supplies available for exchange to Northglenn
is diminishing due to development in the area historically irrigated.
FRICO shares are delivered via the Croke Canal from November 1 through
March 31. The appropriation date for this water is 1902 which is senior to many
upstream rights on Clear Creek but junior to several large reservoirs and water
diversions downstream on the.main stem of the South Platte River.

2.2. Water/Wastewater Treatment Capacity

Potable Water Treatment and Storage
The City's raw water supply is stored in Standley Lake. Water from Standley
Lake flows by gravity through a pipe to a terminal reservoir with a capacity of 40
million gallons. The terminal reservoir is located at the Northglenn Water
Treatment Facility (WTF) at 2350 West llih Avenue. The WTF has a 16
million gallons per day (MGD) capacity, of which the City typically uses a 14
MGD instantaneous daily maximum. The City's peak and average daily demand
are 10.6 MGD and 4.4 MGD, respectively. In 2002, the City built a new finished
water storage vessel with a capacity of 3 million gallons. Combined with three

9