Plan Description - City of Tustin

Chapter 2 • Plan Description
2.9 DOMESTIC WATER PLAN
The domestic water concept plan (Figure 2-7) was developed in
consultation with The Irvine Ranch Water District (IRWD). IRWD is the
jurisdictional agency responsible for providing domestic (potable) water
service to the Plan.
IRWD currently supplies domestic water to the base through a north-south
16-inch pipeline in the center of the base. IRWD recommends abandoning
the existing military water mains in a phased manner and providing
service connections to developments through a new backbone system and
from existing water mains in adjacent roadways.
The proposed system will serve areas west of Peters Canyon Channel and
will utilize Valencia Loop Road as the backbone of the loop system. The
proposed backbone domestic water system is shown in Figure 2-7 and is
based upon design recommendations proposed in the IRWD Water
Resources Master Plan. The Master Plan recommends that pipe systems
follow a loop pattern and provide service areas with multiple sources of
supply. These recommendations provide operational flexibility that will
prevent loss of service to an area should a source or pipeline fail. The
proposed domestic water system adheres to both of these
recommendations.
Water will be acquired from the following three sources:
• The 54-inch IRWD Barranca Well Line through a tie-in at Von
Karman Avenue and Barranca Parkway.
• An existing 12-inch IRWD line along Harvard Avenue through a tiein
at Moffett Avenue.
• The 18-inch Navy High Pressure Line through a connection at OC-
58, located east of the intersection of Warner Avenue and Red Hill
Avenue, and at the intersection of Armstrong Avenue and Warner
Avenue.
Parcels located east of Peters Canyon Channel will acquire water service
from the Harvard Avenue water main. The 42-inch diameter line will serve
as the backbone domestic water conveyance system. No new backbone
lines are proposed for parcels in this area.
City of Tustin
Page 2-84
MCAS Tustin Specific Plan/Reuse Plan