Tree Preservation Efforts: Hydrovac Excavation

August 3 2017 RHR 206

As major construction occurs across campus, there are several efforts ongoing to preserve our mature trees, including tree protection zones and hydrovac excavation.

Sometimes, sidewalks and utilities under our large trees needs to be modified, requiring disturbance of the roots. Digging a large exploratory hole with steel tools damages the critical root zone by wounding trunks and roots as well as increasing soil compaction.

Here you can see hydrovac excavation uses pressurized water to break up the soil cover.  photo credit: R. Robert

Here you can see hydrovac excavation uses pressurized water to break up the soil cover. photo credit: R. Robert

Pressurized water or air can effectively remove soil without damaging the tree’s delicate root system. Soil has …

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Plants of the Week: September 11

Cryptomeria japonica 'Black Dragon' JTB (1)

Cryptomeria japonica ‘Black Dragon’

Though commonly called Japanese cedar, Cryptomeria japonica was designated by Scottish botanist David Don in the early 1800s as being more closely related to other members of the Cypress Family Cupressaceae rather than to true cedars, which are in the pine family Pinacea,.

Evergreen and cone-bearing, this Japanese native conifer can grow in a variety of conditions from full sun to partial shade. The slow-growing cultivar ‘Black Dragon’ was selected and propagated for its dark foliage; it has bright green new shoots that mature to a deep blackish-green. A ten-year-old specimen can be found outside the …

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Tree Protection Zone

September 23 2015 RHR 031

“Someone is sitting in the shade today because someone planted a tree a long time ago.” –Warren Buffet

photo credit: R. Robert

Chain link fences surrounding trees can be seen encircling the BEP construction site. photo credit: R. Robert

As we undergo large construction projects across campus, visitors will observe chain link fences surrounding trees around the construction sites. These are creating tree protection zones to preserve our mature trees.

Trees provide natural beauty and give human scale to built landscapes. They filter air, purify water, lower heating/cooling bills, increase property values, improve social interactions, and provide habitat as well as a food for …

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