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August 2017
4-7
City of Morgan Hill
Sewer System Master Plan
following Del Monte Avenue. The trunk then turns west, north of Berskhire Drive where it will
continue towards the intersection of Llagas Road and Hale Avenue. At this intersection, the trunk
turns south and follows Hale Avenue, until it reaches Christine Lynn Drive. At this intersection, the
Llagas Trunk discharges into the Hale-Monterey Trunk.
4.2.3
Hale-Monterey Trunk
The trunk starts at the intersection of Hale Avenue and Christine Lynn Drive in a southerly
direction following Hale Avenue as a 15-inch gravity main. The trunk increases into a 20-inch
diameter main for a short section of pipeline 300 feet south of Longview Drive, and then
decreases into a 15-inch diameter main. At the intersection of Main Avenue and Hale Avenue, the
trunk turns east on Main Avenue as a 15-inch diameter main. When the trunk reaches the
intersection of Main Avenue and Monterey Road, the trunk turns south and decreases in a 12-inch
gravity main. The trunk follows the alignment of Monterey Road, and decreases in size into a 10-
inch diameter main at the intersection of Dunne Avenue. From this intersection, the trunk
continues south along Monterey Road. At the intersection of Edes Street, the trunk increases into
a 21-inch diameter main, before consolidating into the Railroad-Monterey Trunk.
4.2.4
Hill-Barrett Trunk
This trunk starts south of the intersection of Dunne Avenue and Hill Avenue as an 8-inch gravity
main. The main continues south following Hill Avenue before increasing to a 10-inch diameter
main when it reaches San Pedro Avenue. The sewer main then turns west at Barrett Avenue,
where it increases in size to a 10-inch sewer main in parallel with a 15-inch sewer main. The trunk
then continues in a westerly direction and increases in size to an 18-inch at the intersection of
Highway 101 and Barrett Avenue. Then trunk then ends at the intersection of Barrett Avenue and
the Railroad where it consolidates into a 24-inch sewer main.
4.2.5
East Dunne Trunk
This trunk starts west at the intersection of Dunne Avenue and Hill Avenue as an 8-inch gravity
main. The main continues westerly along Dunne Avenue before increasing to a 10-inch diameter
main west of the intersection of Dunne Avenue and Highway 101. The trunk continues westerly
along Dunne Avenue until it reaches Laurel Road, where it increases into a 12-inch diameter
main. The East Dunne Trunk continues west and discharges into the Butterfield Trunk, at the
intersection of Butterfield Boulevard.
4.2.6
Railroad-Monterey Trunk
This trunk starts south-east of the intersection of Butterfield Boulevard and Jarvis Drive as a 15-
inch gravity main. The main continues westerly in an easement alignment before turning south at
the railroad. The main continues along the railroad alignment before increasing to a 24-inch
diameter main at Dunne Avenue, and continuing to Tennant Avenue. The sewer main turns west
at Tennant Avenue, where is decreases in size to an 18-inch and continues to Monterey Road.