Other potential sources of urban wood wastes include those generated from the maintenance of municipal parks, utility line and right-of-way maintenance, urban land clearing, residues from commercial nurseries and landscapers, etc. Data is very limited and dated. Data summarized from a 1994 study indicates that a total of 47.9 million dry tons of this type of material were generated for that year, of which 45.4 million dry tons were wood. The study noted that 54% of the wood chips were given away and that 15% were sent to landfills.
The municipal solid waste (MSW) data includes yard trimmings, and the USDA Forest Service includes land clearing operations in their Other Removals category - so it is possible that much of the waste material is included in the estimated MSW and forest sector resource estimates. Wood residues produced as a result of storm events are also sometimes included in the urban resource description. These quantities can be large, but are also intermittent and random in occurrence, which precludes them from being reliable sources of material for bioenergy and bioproducts.