The citizens of Visalia are fortunate to live among the largest remaining stand of native Valley Oaks in the Central Valley.
These magnificent trees need to be protected during development, so that they will survive for the next generation. By
following these standard specifications we can ensure that all will enjoy the beauty of the Valley Oaks for generations to come.
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| 1. |
The protection zone of all Valley Oaks shall be drawn to scale on plans; this includes accurately locating the trunk and depicting
the crown dripline. There shall be no earth work around the crown dripline with out the consent of the City Arborist.
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| 2. |
All utility locations shall be included in all develop plans involving Valley Oak(s).
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| 3. |
Protective tree fencing shall be added prior to any earthwork, at least 3 ft. minimum in height, installed at outer most end of the
dripline surrounding the trunk of a Valley Oak. The temporary fencing shall be: safety orange color, plastic webbing, temporary
construction type fencing. (Snow fencing) Fencing shall be supported by steel T-bar stakes. This fence is to remain
until construction is complete and the City Arborist approves it removal. Nothing may be stored inside the protective fence.
See detail 1.
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| 4. |
There shall be no back filling within 10 ft. of the trunk of a Valley Oak and a maximum of 6 inches of backfill within the crown
dripline. Any deviation from this requires City Arborist approval. Backfill will be of a high quality soil and clean of
any debris.
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| 5. |
There shall be no trenching within the crown dripline of the Valley Oak, or at a distance to be determined by the City Arborist.
Utilities to be installed within the crown dripline shall be bored at a minimum depth of 36". See detail 4
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| 6. |
There shall be no soil compaction, paving or structures placed within the crown drip-line of a Valley Oaks with out the written consent
of the City Arborist.
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| 7. |
Valley Oak trees shall be irrigated before construction starts and through construction during the summer (June through October).
This will help ensure that the tree can better withstand the stress of construction. Irrigation is extremely important during
spring and summer when the environment around a mature Valley Oak is changed by construction. Irrigations shall water all of the
area under the crown dripline. See detail 3
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| 8. |
Permanent irrigation systems must be bubbler, drip, flood or sub-terrain only. No sprinkler systems allowed within 6 ft. of tree.
If an irrigations system is to be added it must be approved by the City Arborist.
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| 9. |
Landscaping under Valley Oaks shall consist of drought tolerant plants or California native plants that are drought tolerant in nature.
There is to be no landscaping within 6 ft. of the trunk. Chipped bark and mulch are suitable for this area. No lawns shall
be planted within 10 ft. of the trunk. We recommend that there be no lawn place within the crown dripline.
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Please contact the City Arborist at 559-713-4295 to answer questions or provide assistance.
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