USDA Forest Service
 

Pacific Southwest Research Station

 
Pacific Southwest
Research Station

800 Buchanan Street
Albany, CA 94710-0011
(510) 883-8830
United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.

Research Topics Urban Forestry

Urban Forest ResearchInfrastructure Conflicts

Trees need space to grow. With cities struggling to accommodate the needs of increasing populations, tree space is a precious commodity. In California alone, well over $70 million is spent each year to repair damages caused by tree roots to urban infrastructure, such as sidewalks, curbs, sewer lines, driveways, and foundations. In many cases, repairs are deferred due to budget limitations, which results in increased liability risks associated with 'trip and fall' incidents.

In some cities the cost of sidewalk repair is being shifted to residents. This shift impacts residents in older areas, where trees are larger, infrastructure has deteriorated, and tree-sidewalk conflicts are most severe. We study how cities can best alter tree planting and maintenance to minimize damage to the urban infrastructure, while maintaining the health of the urban forest.

Products

Xiao, Q., McPherson, G. 2008. Urban runoff pollutants removal of three engineered soils. - View Document [1.23 MB]

McPherson, E.G., J. Muchnick. 2005. EFFECTS OF STREET TREE SHADE ON ASPHALT CONCRETE PAVEMENT PERFORMANCE. Journal of Arboriculture. 31(6) :303-310 - View Document [138.18 KB]

Dodge, L., Geiger, J.R. 2003. Tree Roots and Sidewalk Damage. Western Arborist. 29 (3): 28-29 - View Document [216.49 KB]

Costello, L.R. and K.S. Jones. 2003. Reducing Infrastructure Damage by Tree Roots - A Compendium of Strategies. For information about ordering this publication contact: Western Chapter of the International Society of Arboriculture (WCISA), 235 Hollow Oak Drive, Cohasset, CA 95973 (530) 892-1118

Costello, L.R., E.G. McPherson, D.W. Burger, E.J. Perry and D. Kelly. 2002. [in press]. Strategy to Reduce Infrastructure Damage by Tree Roots: A Symposium for Researchers and Practitioners. Urban Ecosystems - View Document [81.48 KB]

Randrup, T.B., E.G. McPherson and L.R. Costello. 2001. Tree root intrusion in sewer systems: review of extent and costs. Journal of Infrastructure Systems. 7(1) :26-31 - View Document [760.86 KB]

McPherson, E.G., L.R. Costello and D.W. Burger. 2001. Space wars: can trees win the battle with infrastructure?. Arborist News. 10(3) :21-24 - View Document [645.87 KB]

McPherson, E.G. 2000. Expenditures associated with conflicts between street tree root growth and hardscape in California. Journal of Arboriculture. 26(6) :289-297 - View Document [969.71 KB]

McPherson, E.G. and P.J. Peper. 2000. Costs due to conflicts between street tree root growth and hardscape. In: Costello, L., E.G. McPherson, D.W. Burger and L. Dodge, (eds). Proceedings of the symposium on strategies to reduce infrastructure damage by tree roots. Cohasset, CA: Western Chapter, International Society of Arboriculture :15-18 - View Document [299.65 KB]

McPherson, E.G., L.R. Costello, E. Perry, and P.J. Peper. 2000. Reducing tree root damage to sidewalks in California communities: a collaborative study. In: Dodge, L., (ed). Report of the Elvenia J. Slosson Fund for Ornamental Horticulture; 1998-1999. Davis: UC Davis Division of Agriculture and Natural Resources: 8-12

Peper, P.J. and S. Mori. 1999. Root barrier and extension effects on Chinese Hackberry. Journal of Arboriculture. 25(1) :1-8 - View Document [65.29 KB]

McPherson, E.G. and J. Lichter. 1998. Synopsis of tree root response to circling root barriers. Western Arborist. 25 :40-41 - View Document [263.89 KB]

Peper, P.J. and E.G. McPherson. 1997. Street trees and urban infrastructure: getting at the root of the problem. Arborist News. 6(2) :34-35 - View Document [499.07 KB]

McPherson, E.G. and P.J. Peper. 1996. Costs of street tree damage to infrastructure. Arboricultural Journal. 20 :143-160 - View Document [908.58 KB]

McPherson, E.G. and P.J. Peper. 1996. Infrastructure repair costs associated with street trees in 15 cities. In: Watson, G.W. and D. Neely (eds). Trees and building sites. Savoy, IL: International Society of Arboriculture :49-63 - View Document [949.75 KB]

Barker, P.A. and P.J. Peper. 1995. Strategies to prevent damage to sidewalks by tree roots. Arboricultural Journal. 19 :295-309 - View Document [1004.59 KB]

Barker, P.A. 1995. Managed development of tree roots II: ultra-deep rootball and root barrier effects on Southwestern Black Cherry. Journal of Arboriculture. 21(5) :251-259 - View Document [867.74 KB]

Barker, P.A. 1995. Managed development of tree roots I: ultra-deep rootball and root barrier effects on European Hackberry. Journal of Arboriculture. 21(4) :202-208 - View Document [1.28 MB]

Peper, P.J. and P.A. Barker. 1993. A buyer's guide to root barriers. In: Watson, G. and D. Neely. The landscape below ground; proceedings of an international workshop on tree root development in urban soils; 1993 September 30-October 1. Savoy, IL: International Society of Arboriculture :186-193 - View Document [392.74 KB]

Last Modified: Aug 29, 2016 11:06:16 AM