Vegetation Definitions
Brush Density
Can be described as listed below.  Brush acres in the centerline zone are not subdivided by density.  Categories for high voltage distribution and border zone areas of transmission lines are:
Sparse Brush Acres
Is the geographic area that is occupied by tree species that have a crown cover density of less than or equal to thirty-three percent (33%).
Medium Brush Acre
Is the geographic area that is occupied by tree species that have a crown cover density of more than thirty-three percent (33%) and less than sixty-six percent (66%).
Dense Brush Acre
Is the geographic area that is occupied by tree species that have a crown cover density of more than sixty-six percent (66%).
Centerline Zone
Is that area of transmission line right-of-way energized at 138 kV or above that is directly below and in between the outermost conductors of a structure plus and additional ten (10) feet to each side. 
Danger Tree
Is defined as any woody species that attains a mature height greater than twenty (20) feet with a stem (bole) diameter of eight (8) inches or more at breast height (dbh) that is growing adjacent to the normally cleared area of transmission right-of-way and is capable of contacting the transmission line if it were to fall towards the line.  Danger trees may or may not be maintained landscape trees growing in a maintained a landscape.
Distribution Brush Unit
Is a ¼ length of distribution span that contains any woody vegetation capable of growing 20 feet or more at maturity and is less than the conductor height within the right-of-way.  Distribution brush units are not in the reliability work but are included in the Unit Brush Work.
Transmission Brush Unit
Is a sparse, medium or dense acre of woody vegetation capable of growing 20 feet or more at maturity within the right-of-way as identified by the Owner’s transmission inspection program that is not a transmission tree.
Transmission Tree
Is any tree that attains a mature height greater than fifteen (15) feet and is a minimum eight (8) inches in diameter at dbh that is growing on a high voltage distribution or transmission right-of-way in an unmaintained area or any tree that attains a mature height greater than fifteen (15) feet and is a minimum four (4) inches in diameter at dbh that is growing on a high voltage distribution or transmission right-of-way in a maintained area.
Tree
Is any woody species that attains a mature height greater than twenty (20) feet with a stem (bole) diameter of four (4) inches or more at dbh for distribution circuits and any woody species that attains a mature height greater than fifteen (15) feet with a stem (bole) diameter of eight (8) inches or more at dbh for high voltage distribution and transmission lines.  For reporting and billing purposes, trees growing near or adjacent to multiple conductors are considered one tree.  Multi-stem trees (same species) physically separated at a point greater than two (2) feet above ground level will be considered one tree if any of the stems, measured at dbh are four (4) inches in diameter or greater.  Each stem of multi-stem trees dividing at a point less than two (2) feet above the ground will be considered a separate tree if that stem, measured at dbh, is four (4) inches diameter or greater.
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Owen Tree Service provides tree, lawn, and landscape services to the following cities and towns:
Genesee County, Michigan:
Burton
Davison
Flushing
Goodrich
Linden
Otisville
Clio
Fenton
Gaines
Grand Blanc
Montrose
Otter Lake
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Genesee
Lennon
Mt Morris
Swartz Creek
Lapeer County, Michigan:
Almont
Brown City
Columbiaville
Imlay City
Metamora
Peck
Attica
Clifford
Dryden
Lapeer
North Branch
Sandusky
Hadley
Mayville
Otter Lake
Silverwood
Macomb County, Michigan:
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Clinton Twp
Grosse Pointe
Macomb
New Haven
St Clair Shores
Centerline
Detroit
Grosse Pointe Farms
Ray
Sterling Heights
Chesterfield
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Memphis
Romeo
Utica
Clinton
Fraser
Grosse Pointe Woods
Mt Clemens
Roseville
Warren
Harrison Twp
New Baltimore
Shelby Twp
Washington
Oakland County, Michigan:
Auburn Hills
Bloomfield Village
Ferndale
Orion
South Lyon
Berkley
Clarkston
Franklin
Madison Heights
Ortonville
Southfield
Beverly Hills
Clawson
Hazel Park
Milford
Oxford
Troy
Bingham Farms
Commerce Twp
Highland
Novi
Pleasant Ridge
Walled Lake
Birmingham
Davisburg
Holly
Oak Park
Pontiac
Waterford
Bloomfield
Detroit
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Oakland
Rochester
West Bloomfield
Bloomfield Hills
Farmington
Lake Orion
Oakland Twp
Rochester Hills
White Lake
Farmington Hills
Lathrup Village
Orchard Lake
Royal Oak
Wixom
St. Clair County, Michigan:
Algonac
Casco
East China
Harbor Beach
Lexington
Peck
Allenton
Clay
Emmett
Harsens Island
Marine City
Port Huron
Berlin
Clyde
Fair Haven
Jeddo
Marysville
Richmond
Brockway
Columbus
Fort Gratiot
Kimball
Memphis
Sandusky
Capac
Cottrellville
Goodells
Lakeport
North Street
St Clair
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