boundary has not been delineated. Thick overburden occurs in the northern part of the
aquifer. It is therefore classified as moderately vulnerable although overburden is much
thinner in the southern and eastern portions of the Cobble Hill Aquifer. This is a moderately
productive aquifer with a yield range of 0.03 – 8.52 L/s. The direction of flow has not been
determined however it is anticipated that flow is toward the Saanich Inlet. Recharge
mechanisms have not been determined, but is probably from precipitation. There are multiple
users of this aquifer including domestic, irrigation, and community water supply. Water
reliance is conjunctive. Several water licenses exist on rivers, creeks, and springs in the area.
The Cherry Point Aquifer overlies the Cobble Hill Aquifer in the northern area of the aquifer.
Bamberton Aquifer (207
)
The 27 km
2
Bamberton aquifer is comprised of volcanic intrusives and occurs east of the
Shawnigan Lake watershed. It extends to Bamberton Park in the south, Saanich Inlet to the
east and Shawnigan Lake to the north. Productivity is low to moderate with a reported yield
range of 0.02 to 12.62 L/s. Aquifer vulnerability is moderate. Thicker deposits including
marine and glaciomarine clays and silts, and glacio-fluvial deposits of Vashon drift occur in
the northern and eastern portions of the aquifer. The Mill Bay Aquifer (206) occurs above the
bedrock aquifer near Mill Bay. Neither direction of flow or recharge have been fully
determined, however it is assumed that the direction of flow would be east towards the
Saanich Inlet and north into the Mill Bay aquifer, while recharge is likely from precipitation.
Wells are used for domestic, municipal, irrigation and commercial purposes. Water reliance is
conjunctive, several water licenses exist on springs and streams in the area.
Ma lahat Aqui fer (208)
This 20.5 km
2
gneiss aquifer is located between Spectacle Lake on the north and Arbutus
Creek on the south. The eastern boundary is Saanich Inlet and western boundary is the
Malahat Ridge. The productivity of this aquifer is moderately low with a yield range of 0.03 to
3.79
L/s. The vulnerability of this aquifer is classified as high, with bedrock predominantly
outcropping (76% of reported wells) or being overlain by a thin cover of ground moraine. The
direction of flow has not been established but it is believed that water flows east toward the
Saanich Inlet, and recharge is likely from precipitation and runoff from mountains to the west.
This aquifer is being used for domestic purposes. Water reliance is conjunctive with several
water licenses on creeks, streams, lakes and springs in the area.
