Laserfiche WebLink
<br />06885 P.rcvcnting Construction Damage to Trees <br /> <br />)1) )!().l 6:54 <br /> <br />Where fencing to prevent construction traffic is not possible, use temporary wood chip mulch, e,'Tavel mulch or bridges to <br />prevent soil compaction around tree roots. Place wood chips or gravel mulch 6 to 12 inches deep on top of a geotextiJe <br />landscape fabric placed over the root zone of the trees to be protected. <br /> <br />Air spaces in the mulch cushion the impact of machinery or foot traffic and disperse the weight over a larger area, The <br />landscape fabric makes cleanup easy. Tempomry bridges built from steel plates placed on railroad ties distribute the weight of <br />equipment over larger areas. What compaction does occur "\Till be li,'nited to areas directly below the railroad ties (see Figure <br />4). <br /> <br /> <br /> <br />- <br /> <br />tIN <br /> <br />Figure 4. Use of bridges to protect tree roots. <br />Handle grade changes <br /> <br />Cutting away soil from a tree removes a portion of the root system and changes the soil moisture level. For reasonable survival <br />of trees, make no cuts within the dIipline. Construct a retaining wall at the dripline or farther out to preserve the tree's roots <br />(see Figures 5 and 6). <br /> <br /> <br />Figure 5. This change in grade has killed half the tree's roots. Most trees will die from this extent of <br />injury . <br /> <br />http://m ueme/1 sion ,m issouri ,edu/ explore! aggui des/hort! g06 885" htm <br /> <br />Page 5 of <br />