November 3, 2017

Correspondance with the Winter Service about salt

Mail to Vibeke Vedel from the Winter Service and Service Chief in the City Maintenance Jon Pape, from Save the Urban Trees Oct. 20 2017.

Dear Vibeke and Jon,

Greetings form Save the Urban Trees, as we have in horror observed the development of the trees along the lakes that are still salted. This goes for the road side and the spot on the lucky side, by Fredensbro, where the caliumformiat route skips and the salt sets in. I have attached pictures and illustrations. I don't think this is done in evil, but because there is a lack of understanding of exactly how much damage is done by salting these exact stretches. The salt is not just flushed out into the sewer system, but rather accumulated in the soil, causing the trees immense damage. Several arborists have inspected the trees that are still salted and they all agree that is causing severe damage.

This is why we will attempt to make the politicians grant the funds needed for including the remaining lake trees to the caliumformiat route. In the hopes that we can keep our old trees a little longer.

Two questions:
What is the added cost of sparing the road side trees from salt?
Is it possible to add the loop* by Fredensbro to the caliumformiat route?

Kind regards
Sandra Høj
Save the Urban Trees

*The loop = See attached pictures of the stretch by Fredensbro.








Reply from the Winter Service, November 3rd 2017.

Dear Sandra Høj

Thank you for the inquiry of Oct. 20 2017 regarding the cost of using caliumformiat on Søgade-side along the lakes and the loop by Fredensbro.

The bike lane stretch along Søgade-side, where we are today using salt is approx. 8.550 m2. In the event that we need to use caliumformiat over salt it means an added cost of approx. 85.500 kr per season for an average winter (50 calls). Should we face a hard winter the m2 cost for the use of both salt and caliumformiat be doubled.

We have assessed the possibility of adding the loop to our caliumformiat route. As we are talking about a very smalle stretch, we find that this can be done. Which is why in the future we will spread caliumformiat by the Fredensbro loop.

As Jon Pape wrote you in a reply dated January 19 2017, we have been added funds so we can use caliumformiat on selected stretches. Here we have prioritized the use of caliumformiat where there is a special need for nature protection. We have not used caliumformiat on the stretches you are referring to here. Should we use caliumformiat on stretches like for example the Søgade-side, where we are today using salt, it would entail that we either reprioritise the stretches where we are today using caliumformiat, or it will mean an added cost to switch. As such, the distribution depends on further funding to finance the reorganization. It is worth noting that even if we were to switch to caliumformiat on the Søgade-side, the trees along the lakes are still facing hard living circumstances, due to disease and road work over time, affecting the roots, which switching to caliumformiat won't fix.

Again thank you for getting in touch.

Kind regards

Vibeke Vedel
Center for Bydækkende Drift
Byens Drift
Teknik- og Miljøforvaltningen

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