Hornsby Local Environmental Plan 2013
sch.3-secDams
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sch.3-sec Dams
Dams
(1) Maximum capacity—0.4ML.
(2) Must be on land that has a slope of less than 13.5°.
(3) Must not be located—
(a) on land identified as Class 1 or 2 on the Acid Sulfate Soils Map, or
(b) on land in Zone C3 Environmental Management, or
(c) on land identified as “Biodiversity” on the Terrestrial Biodiversity Map, or
(d) on land within a foreshore area, or
(e) on a site occupied by a heritage item or draft heritage item, or on land comprising a heritage item.
(4) Must not involve fill material from outside property or removal of excavated material from property.
(5) Must not involve the removal or pruning of a tree or other vegetation that requires a permit or development consent for removal or pruning, unless that removal or pruning is undertaken in accordance with a permit or development consent.
(6) Minimum height from top of water level to crest of dam—1m.
(7) Spillway must not direct excess water onto adjoining properties.
(8) Spillway must be adequate for a 1 in 20-year storm event.