Capitol Park Tree Stability Study

  • The Wisconsin state capitol building stands on a park-like acre of land graced with century-old trees. Planted in the early 1900’s under the direction of landscape architect John Nolen
  • In 2005, there were several dramatic instances of Norway maples around the capitol falling in highly populated public areas.
  • The Wisconsin Department of Administration became concerned about the condition of the 153 trees in the Capital Park and the safety of the hundreds of thousands of annual park visitors
  • The fallen trees showed evidence of significant decay which was not readily apparent by looking at their exterior, prompting officials to contact Allison Tree Care.
  • Allison started with a thorough visual inspection, climbing the trees to evaluate the cavities and take measurements.
  • Some trees, like this large butternut, had extensive cavities filled with dozens of squirrels, making for an interesting experience!
  • Placing two sensors on opposite sides of the tree trunks, Allison measured the speed of sound waves sent between them.