picture: proposed Stoney Creek Tributary crossing.
July 30, 2010. VS
On Friday, July 30th 2010 I, Vivian Sorensen, toured aspects of Phase 1 of the 2010 East Gaglardi Trail in order to respond to the Burnaby Mountain Conservation Park, 2010 East Gaglardi Way Trail Proposal. I later brought the information from this meeting, shared by Henry deJong (CoB), Chris Lee (Biological Consultant, AquaTerra), and Elaine Nasby, MBCSLA (LEES + Associates) to my peers at Stoney Creek Environment Committee.
An outline of the July 30th meet is available from E. LEES + Associates: “Meeting Notes for User Group Reps Consultation Meeting #2 Burnaby Mountain New Trail
Alan James, Secretary of SCEC (email@example.com) and
Pablo Vimos, Geologist (SFU) (firstname.lastname@example.org) and I toured areas of Phase 1 trail on Tuesday, August 3, 2010.
It is difficult to assess impact of the proposed trail in hot summer when most creeks are currently dry on the South Slope of Burnaby Mountain. SCEC believes that environmental approvals will only be conceivable in later fall, and when Stoney and Silver Tributaries have reached full capacity.
Impact on water courses, undetermined. see dry creek bed. Stoney Creek tributary July 2010. VS.
After reviewing the DNV trail standards, published by DNV and LEES, Geologist, Pavlo Vamos interpreted that the proposed trail will be a Type 2, Unsurfaced, single-track trail, 50-70 cm tread width on native soil, cleared trail corridor width of 1.3m, cleared height of 2.4m, machine or hand build. A low maintenance trail.
From this short description the critical points are native soil and surface water flow. Soils are conglomerate and rather unstable, muddy when wet and crumbly when dry, which must be explained how designers (LEES + Assoc.) will manage and stabilize the Tread Wear. Since constant bike skidding and breaking hard will lead to erosion and trail displacement.
From the standards, it is clearly stated that culverts are not recommended due to the in-stream disturbance required and additional monitoring and maintenance to prevent clogging. So bridges are the alternative, explanation is required on how to avoid cyclist going through the stream rather than over the bridge.
Since native soil is loose, is soil compaction being considered?
Increased sunlight (reduced cover) will allow for growth of salmon berry. Of course a balance is necessary.
It is important with the introduction of trails into Burnaby Conservation Park that a complex ecosystem – including areas of mixed coniferous/deciduous second-growth forest is respected.
We understand construction of the trails will not interfere with nesting seasons. We believe that the proposed protection by Aqua Terra Biological Consulting of snail sideband snail (blue listed) , for example, are important programs.
There are many species including black-tailed deer, barred owl, black bear, coyote, and many species of birds including many, according to Krystal Brennan, Education Coordinator of BWR: 200 species of migratory birds that utilize the forest. Effort must be made to reduce impact on these systems.
The forest habitat will face ongoing pressure in future. In conjunction with the condition of loose soils we are concerned steps are taken to assure durability and sensitivity constraints.
Reducing Impacts of Invasive Species
I suggest programs be supported by DoB to prevent damage by invasive species, that can be brought in to the forest by trail users. Already I have noted Hounds Tounge at the entrance of proposed Phase 1 trail, along the Kensington Power House road access. Japanese knotweed another highly strong invasive grows extensively in the parking lot to the Kensington Power Station.
￼ ￼ ￼
Hounds Tounge is very difficult to remove once root systems have established. Marg Anderson, current member of Burnaby Lake Park Association, and participant in Weedbusters! for example has noted that the spread of this weed into Burnaby Lake Park could be very hard to control, and thus devastating.
Sustainability of the trail project requires managing of invasive species before issues compound.
Maximizing Users’ Experience of Natural Areas
In order to facilitate respectful meaningful use of the park we encourage hot spots, sites where trail users can rest/meet, including educational boards of local species – interpretative sites – to highlight experience and appreciation of complex ecosystems. [information boards and resting points will be provide appropriate resources for best use of trails ed. vs]
By Vivian Sorensen
with contribution by Alan James, Secretary SCEC
and Pablo Vimos, Geologist (SFU)
in addition Vivian is an executive member of UniverCity Neighbours for Env. Sustainability. Habitat Garden Committee Member – Burnaby Wildlife Rescue. Urban Design Certificate (2008 SFU)