Figure 11. Headwall culvert, receiving stormwater runoff from the Parkway and Nicklaus Drive. The
narrow diameter culvert reflects the low volume of runoff being discharged onto the 1150 Bear
Mountain Parkway property. The angular rock in the foreground is designed to reduce discharge
velocities and promote infiltration.
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Figure 12. Looking upstream at the stormwater detention works adjacent to Nicklaus Drive. The step
pool structures (yellow arrows) are designed to reduce flow velocities and the grass sedimentation
pond, in the foreground, detains runoff, promoting infiltration.
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Figure 13. Upstream headwall culvert (yellow arrow) showing that stormwater runoff must first fill
the impoundment before flowing through the culvert onto the property downstream. The large
impoundment ensures optimum infiltration of runoff before decant volumes are discharged
downstream.
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Figure 14. Secondary stormwater runoff, from the Parkway, onto 1150 Bear Mountain Parkway
property (yellow arrow pointing at the concrete headwall culvert outlet). The dashed yellow line
shows the drainage route of the stormwater runoff; these flows infiltrate quickly into the forest floor
within a few metres within the forest canopy.
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Figure 8. Looking north along the B.C. Hydro Transmission ROW. This location is part of the
proposed Covenant ‘swap’. There are trails along the ROW leading to the golf course (upper lefthand portion of the photograph), as well as through the large Covenant portion of the property. The
trails within this portion of the property appear to be well traveled. This trail network provides
valuable connectivity with the Gowland areas and the forested lands in the background. The ROW,
with its elongated riparian-wetland (dedicated as Park as part of the Hanington Creek Estates
development), as well as the protection it receives as part of the Hydro ROW, play an important
connecting habitat role in linking these upland areas with Millstream Creek. Millstream Creek
provides a connectivity corridor with the marine environment adjacent to Esquimalt Harbour.
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Figure 16. Example of the trail network found within the proposed Covenant swap area. These trails
are well used and would benefit from the additional protection acquired under the proposed
subdivision development and Covenant swap.
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Figure 17. This trail is found at the juncture between the proposed subdivision lot layout and the
swap Covenant area. Walkers and mountain bikers use these trails as evidenced by the absence of
forest plants along the trail. Some minor work would be recommended to protect the forest canopy
through “programmed access trail management”.
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Appendix A – Natural Areas Atlas showing the Hanington Creek catchment.
This aerial view of the Hanington Creek catchment shows its headwaters lying, in part, in
the proposed subdivision, with flows from both the natural spring and the runoff from
Nicklaus Drive. The stream channel then flows north-east, paralleling the Hydro ROW,
before entering the elongated riparian-wetland within Hanington Creek Estates Park. The
stream then flows east, through the subdivision, ending with its confluence in Millstream
Creek.
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Appendix B – Natural Areas Atlas showing the proposed development site, together
with key catchment landscape features, associated with the Figures in the textual
portion of the Memorandum. A second drawing, taken from J.E. Anderson &
Associates, is included showing the Lot Layout and the development site’s contour
elevation profile.
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Appendix C – Simplified illustration of the basic design goals for a Conservation
Subdivision Design.
The essential elements of the conservation design process are:
• Characterize the landscape features, within the property boundary, as
well as the catchment the property lies within, with respect to primary
conservation areas. In this case the proposed redevelopment is part of
an earlier development proposal that was based, in part, upon the
majority of the site being left in its natural, forested state, with a
protective Covenant on the property in favour of ecosystem
preservation. The proposed redevelopment portion of the site (17%),
has a small stream and riparian-wetland, which form part of the
headwaters for a significant riparian-wetland that are the receiving
environment for surface runoff from the proposed subdivision. This
stream channel is the primary ecological conservation element
requiring protection (e.g., the protection is afforded by the Federal
Fisheries Act, MOE’s RAR, and municipal Special Development
Permit Areas).
• Secondary conservation areas are then characterized.
• Potential development areas are identified. As noted above, the
proposed redevelopment of the 4-hectare subdivision would lie within
an area previously deemed the optimal site for development. Its
proximity to the existing access road network, municipal infrastructure
services, and Hydro ROW are key aspects making this the optimal
location for higher density development.
• Location of potential housing sites (lot layout).
• Designing the road and trail alignment.
• Drawing in the lot boundary lines to ensure the subdivision design
conforms to municipal zoning and building code requirements.
Reference: Conservation design for subdivisions: a practical guide to creating open space
networks. 1996. Natural Lands Trust, American Planning Association, and American
Society of Landscape Architects. Island Press, Washington, D.C.
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