Inventory Form Key:
Tree Record / Genus and species
Individual Tree Identifier
(unique ID or GPS location) / Scientific Name OR i-Tree Species Code
DBH
Diameter at Breast Height (4.5ft); round up diameter to whole DBH inch
Insect / Disease
YES/NO or type of insect / YES/NO or type of disease
Condition - healthy tree cover
Good> 75%healthy tree cover
A nice, healthy tree.
Fair50-75%healthy tree cover
Some dead branches but mostly healthy.
Poor25-50%healthy tree cover
Lots of dead branches mixed with healthy branches.
Dead/Dying<25% healthy tree cover
Mostly/completely covered in dead branches.
Crown Spread
W1 - Longest width in Feet
W2 – Shortest width in Feet
Both widths measured through tree trunk at a right angle to each other.
Memorial Plaque / Conflicts
Yes | No
Name: Name as written on Plaque / Overhead wire
Sidewalkheaving
Encroaching a structure, walkway, easement, fence, parking space, etc.
Sight-line obstruction
Comments

Arizona Urban Tree Inventory
Data Collection Form
Lake Havasu City, AZ

Tips for measuring DBH

The tree tapers in such a way that the diameter at a point below 4.5 feet is actually smaller than the diameter at 4.5 feet. Measure the diameter at the smallest point.
The tree has branches or bumps that interfere with DBH measurement. Measure DBH below the branch or bump, either a foot below or the point where bumps or branches cease to affect diameter of the stem. The underlying concept is to measure the diameter that would be closest to the expected DBH if branches or other irregularities were not present.
The vertically growing tree is on a slope. Measure the diameter 4.5 feet from the ground on the upper side of the slope.
The tree leans. Measure 4.5 feet up the stem in the direction of the lean.
The tree forks below DBH or near DBH. Measure the diameter at the narrowest part of the main stem below the fork.
The tree splits into several trunks close to ground level. Measure the diameter of each trunk separately, using the principals described above. The DBH for the tree is found by squaring each diameter, adding up the squared diameters, and taking the square root of the sum of squared diameters.

For double sided printing or copying, flip over at the narrow edge of this document.

Version 11/10/2014


USDA –FS / in, ft/10, in, ft/10, diameter-inch

Arizona Urban Tree Inventory Data Collection Form –Lake Havasu City, AZ
Highlighted fields are required for inclusion in the AZ State Forestry Urban Tree Inventory program. / Page _____ of _____
Project ID______ / Inventory Area______ / Surveyor Name ______ / Survey Date (MM/DD/YYYY)______
Tree Record / Genus species OR Species Code / DBH (in) / Condition / Insect / Disease
G | F | P | D / YES | NO / YES | NO
Crown Spread (ft) / Memorial Plaque / Conflicts
W1:
W2: / Yes | No
Name: / Overhead | Heaving | Encroaching | Sight-line
Comments:
Tree Record / Genus species OR Species Code / DBH (in) / Condition / Insect / Disease
G | F | P | D / YES | NO / YES | NO
Crown Spread (ft) / Memorial Plaque / Conflicts
W1:
W2: / Yes | No
Name: / Overhead | Heaving | Encroaching | Sight-line
Comments:
Tree Record / Genus species OR Species Code / DBH (in) / Condition / Insect / Disease
G | F | P | D / YES | NO / YES | NO
Crown Spread (ft) / Memorial Plaque / Conflicts
W1:
W2: / Yes | No
Name: / Overhead | Heaving | Encroaching | Sight-line
Comments:
Tree Record / Genus species OR Species Code / DBH (in) / Condition / Insect / Disease
G | F | P | D / YES | NO / YES | NO
Crown Spread (ft) / Memorial Plaque / Conflicts
W1:
W2: / Yes | No
Name: / Overhead | Heaving | Encroaching | Sight-line
Comments:
Arizona Urban Tree Inventory Data Collection Form – Lake Havasu City, AZ
Highlighted fields are required for inclusion in the AZ State Forestry Urban Tree Inventory program. / Page _____ of _____
Project ID______ / Inventory Area______ / Surveyor Name ______ / Survey Date (MM/DD/YYYY)______
Tree Record / Genus species OR Species Code / DBH (in) / Condition / Insect / Disease
G | F | P | D / YES | NO / YES | NO
Crown Spread (ft) / Memorial Plaque / Conflicts
W1:
W2: / Yes | No
Name: / Overhead | Heaving | Encroaching | Sight-line
Comments:
Tree Record / Genus species OR Species Code / DBH (in) / Condition / Insect / Disease
G | F | P | D / YES | NO / YES | NO
Crown Spread (ft) / Memorial Plaque / Conflicts
W1:
W2: / Yes | No
Name: / Overhead | Heaving | Encroaching | Sight-line
Comments:
Tree Record / Genus species OR Species Code / DBH (in) / Condition / Insect / Disease
G | F | P | D / YES | NO / YES | NO
Crown Spread (ft) / Memorial Plaque / Conflicts
W1:
W2: / Yes | No
Name: / Overhead | Heaving | Encroaching | Sight-line
Comments:
Tree Record / Genus species OR Species Code / DBH (in) / Condition / Insect / Disease
G | F | P | D / YES | NO / YES | NO
Crown Spread (ft) / Memorial Plaque / Conflicts
W1:
W2: / Yes | No
Name: / Overhead | Heaving | Encroaching | Sight-line
Comments:

Spacer paragraph – do not delete