December 28, 2017

How to Make A Back Lane Not Just for Vehicles-was the "Country Lane" concept Just Ten Years too Soon?

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You may have been  following the story of the Richmond residents living in Steveston that found out that the closed back lane in their back yards was going to be opened and become a functioning lane. When these properties were purchased, the easement for the City’s lane was clearly on the title, but was not being acted upon, allowing residents to use that space for their own green spaces. The City of Richmond indicated that the back lanes would only be constructed when lane dedication and associated access were required for sewer or other such infrastructure replacement.
As reported in the Richmond News, Richmond has 45 kilometers of open and unopened lanes. Approximately 85 per cent of the lanes are constructed across the city, although in Steveston only 40 per cent are open and functioning. The City has easements of about ten feet on the back of properties, and when the lanes are constructed the actual lane width is about twenty feet.
Back lanes are an unusual feature in Metro Vancouver municipalities and are well-loved by movie sets. They were originally designed to be service lanes for services such as garbage removal. In the City of Vancouver lane “improvements” mean paving over the back lane provided which sustainably seems at odds for reducing off gassing, permeability and speed, and does contribute to flooding of adjoining properties. It was Sharole Tylor in Mountainview Neighbourhood in Vancouver that convinced the City of Vancouver to try something different other than the so-called improvement of the “paved lane”. By installing two concrete driving strips, using a permeable geoblock with structural soil, engineer  David Desrochers created a new demonstration of a new lane that also became a popular public space useable in a community that was park deficient.  As the National Post reports, even though three of these demonstration “country” lanes were installed, they were never costed out correctly for their sustainable benefits, and were dismissed by the then new Vision civic leadership in favour of more “green” paving techniques.
But perhaps the timing of the rebirth of a sustainable country lane is more appropriate now with clear concerns about  how to create usable parklike space, to manage flooding, and off gassing, and  to encourage more sustainable practices. The City of Richmond perhaps learning from the City of Vancouver’s lack of sustainable followup   is offering several options for the new laneway, including paving, the use of green filtration swales, or a country lane. There are open houses at the Steveston Community Centre on January 10 and January 17 and more information that will be available on the LetsTalkRichmond.ca site in early January.
 
There is also an  old YouTube Video of the first Country Lane in Vancouver that can be viewed at this link.

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  2. I’ve lost count how many times I’ve commented about “infiltration swales” here on PT and elsewhere considering our very wet winters, and accounting for the shallow underlayment of hard silt and glacial till. They fill up with the first November rain, then overflow and cause flooding. This is my experience with urban and park design all over the south coast for many years. As a former consultant I warned clients away from small bioswales. They are an impractical landscape fashion accessory. Not a single drain pit or infiltration swale we’ve tried over the decades has worked as intended, and they are always replaced at considerable expense.
    The only value the larger ones have is acting in a storm water detention capacity. However, Richmond already has an issue with exceedingly high ground water, and today the sea is pressurizing it so that salt water is infiltrating from below at high tide. How do you infiltrate that?
    Country lanes have a certain but aesthetic value but are expensive. Being lanes, though, they serve a practical function. But please don’t refer to them as infiltration structures when accompanied by small ditches that inevitably require a lot of maintenance and fill up with sediment, very troublesome invasive plants like Japanese knotweed and garbage. The last thing they do is accommodate infiltration beyond the first big storm of the season in a rainforest climate with hard or permanently saturated soils just below the surface. Nor should they be considered as substitutes for a good storm sewer system.

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