Structured Removal


2017 Structured Removal Maps:

What is Structured Removal of ash?

In response to the growing emerald ash borer infestation, The City of Saint Paul has, since 2010, employed the "Structured Removal" of ash in order to strategically reduce the total percentage of ash trees on boulevards and in parks throughout Saint Paul.


How are trees selected for structured removal?

In 2017, structured removal will be the removal of blocks of EAB infested ash trees.

In the past, the focus for structured removal is on areas that were planted in a monoculture of ash. Trees that are declining from non-EAB related symptoms such as drought, salt injury, mechanical injury, and structural defects are selected for structured removal. In general, ash trees become brittle and drop many branches while reaching maturity and are a source of common complaints from residents.

Why are you removing live trees?

The blocks of infested ash trees removed through structured removal would have died from EAB within the next few years. By removing them before tree mortality occurs, the city is reducing the number of dead and potentially hazardous ash trees in the city.


Why not save the trees with insecticide treatments?

Forestry treats a portion of the high value ash trees on boulevards and in parks that meet the following criteria:

  • Between 10-20" diameter at breast height (DBH)
  • In good health with no known defects
  • No visible conflicts with utility wires, street lights, or roadway clearance.

What happens once ash trees in the structured removal program are removed?

  • In 2017, removals will begin in early January.
  • Information regarding stump removal and tree planting will be coming soon.