[Ord. No. 01-35, 8-2-2001]
This Chapter shall be known and cited as the "Erosion Control
and Storm Water Regulations" of the City of Hollister.
[Ord. No. 01-35, 8-2-2001]
The purpose of this Chapter is to guide land development in
controlling sedimentation, erosion and storm water runoff and to protect
adjoining property, natural waterways, and City infrastructure from
sedimentation, erosion and storm water runoff.
The maximum ability of a storm drainage facility to convey,
detain or retain stormwater flows without causing substantial damage
to public or private property.
A natural or artificial open watercourse with definite bed
and banks that periodically or continuously contains moving water
or that form a connecting link between two (2) or more bodies of water.
An element of a discharge structure that allows the gradual
release of water under controlled conditions.
Indicates specific measures and sequencing to be used controlling
sediment and erosion on a development site before, during and after
construction.
The delay of storm water runoff prior to discharge into receiving
waters.
A facility constructed or modified to restrict the discharge
of storm water to a prescribed maximum rate and to concurrently detain
the excess waters that accumulate behind the outlet.
Any individual, firm, corporation, association, partnership
or other entity involved in commencing proceedings under this Chapter
to effect the development of land for him or another.
Any manmade change to improved or unimproved land including,
but not limited to, buildings or other structures, mining, dredging,
filling, grading, paving, excavation, drilling operations, or any
other land disturbance. Any subdivision of land as defined in the
City's subdivision regulations, excluding minor subdivisions.
Structural device, usually of concrete, metal, timber, etc.,
through which water is discharged from a project to the receiving
water.
Area from which water is removed by a drainage system; a
watershed or catchments area.
The surface or subsurface system which conveys water from
or over the land including all watercourses, water bodies and wetlands
(also referred to as the storm water management system).
A basin designed to be completely dewatered after having
provided its planned detention of runoff during a storm event.
The wearing away of the land surface by the action of the
wind, water, ice, gravity, or any combination thereof.
Hydraulic controls that function by modifying the storm runoff
by slowing water velocities, thereby allowing soil particles to settle
out; and attenuate the flood peak by detaining flow and releasing
water at a slower rate.
A surface that has been compacted or covered with a layer
of materials so that it is resistant to infiltration of water. The
term includes, but not limited to, most conventionally surfaced streets,
roofs, sidewalks, parking lots and similar structures.
A lot that is bordered by developed lots on at least three
(3) sides.
A feature or structure for temporarily storing excess storm
water, not located on the property in which it serves, having devices
for controlling the rate of release of the stored water, and located
downstream of all sites where the runoff originates.
A feature or structure for temporarily storing excess storm
water runoff, having devices for controlling the rate of release of
the stored water, and located within the property where the runoff
originates.
Those conditions which are expected to exist, or do exist,
after alteration, resulting from human activity, of the natural topography,
vegetation and rate, volume or direction of surface or subsurface
flow.
Those conditions that existed prior to the proposed development
in terms of topography, vegetation and rate, volume or direction of
surface or subsurface flow.
Any water body or stream into which surface waters flow.
The process by which suspended solids from erosion are transported
and deposited.
The waters derived from rain falling or snow melting within
a tributary drainage basin, flowing over the surface of the ground
or collected in a storm water drainage system, storm sewer or watercourse.
Any stream, creek, brook, branch, natural or artificial depression,
slough, gulch, reservoir, lake, pond, or natural or manmade drainage
way in or into which storm water runoff and floodwaters flow either
regularly or intermittently.
A structure designed to retain a permanent pool of water
after having provided its planned detention of runoff during a storm
event.
[Ord. No. 01-35, 8-2-2001; Ord. No. 02-39, 10-17-2002; Ord. No. 07-24, 7-5-2007; Ord. No. 16-27, 6-2-2016]
A.Â
This Chapter seeks to provide standards, criteria, procedures and
controls necessary to minimize the harmful effects of erosion and
flooding from storm water runoff within the City. This is to be accomplished
through the requirements of special measures to mitigate erosion during
and after construction or grading and the detention and controlled
discharge of storm water runoff from any site whereon development
is to be undertaken.
1.Â
Except as provided below, these land disturbance permit and
erosion control and storm water regulations apply whenever any developer
constructs, erects, alters or enlarges any building or structure or
otherwise develops any property in the City that changes amount of
impervious cover on the property and/or whenever any developer clears,
grades, excavates, fills, changes the contour of or otherwise develops
any land within the City. In addition to a grading land disturbance
permit, the development may require a floodplain development permit,
permits from the Corps of Engineers and/or the DNR or other documentation
if the property is in a designated floodplain.
2.Â
Exceptions. The provisions of this Chapter shall not apply to
the following:
a.Â
Any reconstruction, repair or alteration of an existing building
or structure when no land, trees, shrubs, grass or other vegetation
is disturbed, destroyed or removed.
b.Â
Any isolated undeveloped lot in an "R-1" or "R-2" zoning district
unless it involves property that is in a designated floodplain, alteration
of existing drainage facilities, wetlands, watercourse or said lot
is one (1) acre or more in size.
c.Â
The clearing, grading, excavation, filling, removing topsoil
from or changing the contour of less than two thousand five hundred
(2,500) square feet of land unless it involves property that is in
a designated floodplain. The effective acreage for the development
is the total acreage of the project. Development in phases shall not
be considered a reduction in the total project acreage.
