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require a building permit and is located
outside of the corresponding riparian
protection area of a permanent or
temporary stream.
−
Normal residential gardening activities
that occur outside of the corresponding ri-
parian protection area of a permanent or
temporary stream.
−
Forest management activities related to
timber production and harvesting in the
Forest Land Reserve.
−
Works undertaken by a municipal water
system.
−
Emergency removal of a hazardous tree.
−
Emergency works to prevent flood damage
to structures.
−
Subdivision of land parcels where a
conservation covenant satisfactory to
and in favour of the City of Chilliwack
has already been registered for the
maintenance of natural drainage and
protection of groundwater quality.
Rationale for DPA Establishment
This Development Permit Area is designated for
the protection of watershed areas that supply, or
have the potential to supply, water to community
or private utility water systems. If not carefully
managed, development in this Area could result in
the degradation of drinking water quality for many
homes, endangering public health and incurring
substantial remedial costs.
Objective
To protect the quality of drinking water supplied
from community or private utility water systems.
Guidelines Specific to Groundwater Sources
(Map 1A, Sardis-Vedder Aquifer; Map 1C, Vedder
River Fan)
1.
All developments shall be designed to
minimize water quality degradation to the
requirements of the City.
2.
Excavations greater than three metres in
depth or within two metres of the highest
recorded water table elevation from June
1st to October 1st must implement, under
the supervision of a Qualified Environmental
Professional, groundwater protection
measures including, but not limited to, the
following:
a. Dewatering for the excavation, if required,
should not:
• Impact operation of existing municipal
supply wells;
• Impact base flow in creeks within 5
kilometers;
• Exceed 75 liters per second flow.
b. Excavations unattended must be secured by
rigid security fencing;
c. Surface runoff must be directed away from
the excavation to prevent direct seepage
into the aquifer;
d. All necessary steps must be taken to limit
the amount of time that the excavation/
aquifer is exposed;
e. Disposal of dewatering water into the storm
water system is not allowed unless approved
by the City; and
f. The excavated native material or equivalent
as approved by the City must be used to
backfill the excavation, where possible.
3.
Below-grade structures that extend more
than three (3) metres in depth from ground
Implementation Guide