The Village of Allouez finds that uncontrolled stormwater runoff
from land development activity has a significant impact upon water
resources and the health, safety, and general welfare of the community
and diminishes the public enjoyment and use of natural resources.
Specifically, uncontrolled stormwater runoff can:
A. Degrade physical stream habitat by increasing stream bank erosion,
increasing streambed scour, diminishing groundwater recharge, and
diminishing stream base flows;
B. Diminish the capacity of lakes and streams to support fish, aquatic
life, and recreational and water supply uses by increasing the export
of nutrients and other urban pollutants;
C. Alter wetland communities by changing wetland hydrology and by increasing
pollutant loads;
D. Reduce the quality of groundwater by increasing pollutant loading;
E. Threaten public health, safety, property, and general welfare by
overtaxing storm sewers, drainageways, and other minor drainage facilities;
F. Threaten public health, safety, property, and general welfare by
increasing major flood peaks and volumes; and
G. Undermine floodplain management efforts by increasing the incidence
and levels of flooding.
As used in this article, the following terms shall have the
meanings indicated:
BEST MANAGEMENT PRACTICE (BMP)
Structural or nonstructural measures, practices, techniques
or devices employed to avoid or minimize soil, sediment or pollutants
carried in runoff to the municipal separate storm sewer system (MS4)
or waters of the state.
BUSINESS DAY
A day the Village Hall is routinely and customarily open
for business.
CEASE-AND-DESIST ORDER
A court-issued order to halt land disturbing construction
activity that is being conducted without the required permit.
COMMON PLAN OF DEVELOPMENT OR SALE
A development or sale where multiple separate and distinct
land disturbing construction activities may be taking place at different
times on different schedules but under one plan. A common plan of
development or sale includes, but is not limited to, subdivision plats,
certified survey maps, and other developments.
CONSTRUCTION SITE
An area upon which one or more land disturbing construction
activities occur, including areas that are part of a larger common
plan of development or sale.
CRITICAL DURATION STORM
That storm that produces the highest peak rate of runoff.
To determine the critical duration storm a series of rainfall depths
and durations are run in an iterative process until the highest peak
is found.
DESIGN STORM
A hypothetical discrete rainstorm characterized by a specific
duration, temporal distribution, rainfall intensity, return frequency,
and total depth of rainfall. The TR-55, Type II, twenty-four-hour
design storms for the Village of Allouez are: one-year, 2.2 inches;
two-year, 2.5 inches; five-year, 3.2 inches; ten-year, 3.7 inches;
twenty-five-year, 4.3 inches; fifty-year, 4.8 inches; and one-hundred-year,
5.1 inches.
DEVELOPMENT
Residential, commercial, industrial, institutional, or other
land uses and associated roads.
DIVISION OF LAND
The creation from one or more parcels or building sites of
additional parcels or building sites where such creation occurs at
one time or through the successive partition within a five-year period.
DRAINAGE EASEMENT
A legal agreement to allow water to flow across a piece of
property. The easement establishes specific requirements for activities
that can and cannot take place in the easement zone.
EROSION
The process by which the land's surface is worn away
by the action of wind, water, ice or gravity.
FEE IN LIEU
A payment of money to the Village of Allouez in place of meeting all or part of the stormwater performance standards required by Chapter
387 of this Code or this article.
FINANCIAL GUARANTEE
A performance bond, maintenance bond, surety bond, irrevocable
letter of credit, or similar guarantees submitted to the Public Works
Director by the responsible party to assure that requirements of this
article are carried out in compliance with the stormwater management
plan.
IMPERVIOUS SURFACE
An area that releases as runoff all or a large portion of
the precipitation that falls on it, except for frozen soil. Rooftops,
sidewalks, driveways, parking lots and streets are examples of areas
that typically are impervious. Gravel surfaces are considered impervious,
unless specifically designed to encourage infiltration.
INFILTRATION
The entry of precipitation or runoff into or through the
soil.
IRREVOCABLE LETTER OF CREDIT
An agreement with a bank or other institution to pay money
or extend credit to honor the terms of the permit with the Village
of Allouez.
LAND DEVELOPMENT ACTIVITY
A.
Any activity which changes the volume or peak flow discharge
rate of rainfall runoff from the land surface; or
B.
The construction of buildings, roads, parking lots, paved storage
areas, and similar facilities, excluding agricultural land use.
LAND DISTURBING CONSTRUCTION ACTIVITY (or DISTURBANCE)
Any man-made alteration of the land surface resulting in
a change in the topography or existing vegetative or nonvegetative
soil cover that may result in runoff and lead to an increase in soil
erosion and movement of sediment into the MS4 or waters of the state.
"Land disturbing construction activity" includes clearing and grubbing,
demolition, excavating, pit trench dewatering, filling and grading
activities, and soil stockpiling.
LOW FLOW CHANNEL
A small channel located within a waterway used to concentrate
flow during small storms. The purpose of a low flow channel is to
maintain adequate water depth for aquatic organisms and needed scour
velocities to prevent sediment buildup.
MAINTENANCE AGREEMENT
A legal document that is filed with the Brown County Register
of Deeds as a property deed restriction and which provides for long-term
maintenance of stormwater management and best management practices.
MAINTENANCE BOND
A bond which guarantees that the permit holder will perform
needed maintenance outlined in the permit. The bond protects the Village
against loss due to the inability or refusal of the permit holder
to perform to the conditions of the permit.
MAJOR DRAINAGE SYSTEM
A drainage system of open channels and overland flow paths
that carry stormwater during large rainfall events, typically with
greater than a ten-year recurrence interval.
MAXIMUM EXTENT PRACTICABLE (MEP)
A level of implementing best management practices in order
to achieve a performance standard specified in this article which
takes into account the best available technology, cost-effectiveness
and other competing issues such as human safety and welfare, endangered
and threatened resources, historic properties and geographic features.
MEP allows flexibility in the way to meet the performance standards
and may vary based on the performance standard and site conditions.
MINOR DRAINAGE SYSTEM
Those components of the drainage system designed to carry
small rainstorms. The minor drainage system is typically made up of
roadside ditches and storm sewers.
NONSTRUCTURAL MEASURE
A practice, technique, or measure to reduce the volume, peak
flow rate, or pollutants in stormwater that does not require the design
or installation of fixed stormwater management facilities.
OFF SITE
Located outside the property boundary described in the permit
application.
ON SITE
Located within the property boundary described in the permit
application.
PERFORMANCE BOND
A bond which guarantees that the permit holder will perform
to the terms of the agreement. The bond protects the Village against
loss due to the inability or refusal of the permit holder to perform
to the conditions of the permit.
PERFORMANCE SECURITY
A performance bond, maintenance bond, surety bond, irrevocable
letter of credit, or similar guarantees submitted to the Public Works
Director by the permit holder to assure that requirements of this
article are carried out in compliance with the stormwater management
plan.
PERFORMANCE STANDARD
A narrative or measurable number specifying the minimum acceptable
outcome for a facility or practice.
PERMIT
A written authorization made by the Public Works Director
to the applicant to conduct land disturbing construction activity
or to discharge post-construction runoff to the MS4 or waters of the
state.
PERVIOUS SURFACE
An area that releases as runoff a small portion of the precipitation
that falls on it. Lawns, gardens, parks, forests or other similar
vegetated areas are examples of surfaces that typically are pervious.
POLLUTANT
Has the meaning given in § 283.01(13), Wis. Stats.
POLLUTION
Has the meaning given in § 281.01(10), Wis. Stats.
POST-CONSTRUCTION SITE
A construction site following the completion of land disturbing
construction activity and final site stabilization.
POST-DEVELOPMENT
The extent and distribution of land cover types present after
the completion of land disturbing construction activity and final
stabilization.
PRE-DEVELOPMENT
The extent and distribution of land cover types present before
the initiation of land disturbing construction activity, assuming
that all land uses prior to development activity are managed in an
environmentally sound manner.
RESPONSIBLE PARTY
Any entity holding fee title to the property or other person
contracted or obligated by other agreement to implement and maintain
post-construction stormwater BMPs.
RUNOFF
Stormwater or precipitation, including rain, snow or ice
melt or similar water, that moves on the land surface via sheet or
channelized flow.
SITE
The entire area included in the legal description of the
land on which the land disturbing construction activity occurred.
SITE RESTRICTION
Any physical characteristic which limits the use of a best
management practice as prescribed in the latest edition of technical
standards identified, developed or disseminated by the Wisconsin Department
of Natural Resources under Subchapter V of Ch. NR 151, Wis. Adm. Code.
STOP-WORK ORDER
An order issued by the Public Works Director which requires
that all construction activity on the site be stopped.
STORMWATER MANAGEMENT PLAN
A comprehensive plan designed to reduce the discharge of
pollutants from stormwater after the site has undergone final stabilization
following completion of the construction activity.
STRUCTURAL MEASURE
Source area practices, conveyance measures, and end-of-pipe
treatment that are designed to control stormwater runoff pollutant
loads, discharge volumes, and peak flow discharge rates.
SURETY BOND
A guaranty provided by a bonding company to pay the Village
for loss due to the inability or refusal of the permit holder to perform
to the conditions of the permit.
TECHNICAL STANDARD
A document that specifies design, predicted performance and
operation and maintenance specifications for a material, device or
method.
TR-55
The United States Department of Agriculture, Natural Resources
Conservation Service (previously Soil Conservation Service), Urban
Hydrology for Small Watersheds, Second Edition, Technical Release
55, June 1986.
TYPE II DISTRIBUTION
A rainfall type curve as established in the United States
Department of Agriculture, Soil Conservation Service, Technical Paper
149, published 1973. The Type II curve is applicable to all of Wisconsin
and represents the most intense storm pattern.
Unless the Public Works Director gives prior authorization, the following methods shall be used for designing best management practices and drainage systems to meet the requirements of Chapter
387 of this Code and this article:
A. All hydrologic and hydraulic design calculations for stormwater storage
or detention facilities shall be based on the principles of the SCS
curve method document titled "Urban Hydrology for Small Watersheds"
(TR-55) or other methods acceptable to the Public Works Director.
Computer models that may be used include:
(1) United States Army Corps of Engineers HEC-1 or HEC-HMS.
(2) Natural Resources Conservation Service TR-20.
(3) Natural Resources Conservation Service TR-55.
(4) Illinois State Water Survey ILLUDAS.
(5) United States Environmental Protection Agency's SWMM.
B. For the design of stormwater drainage systems, including storm sewers
or open ditches, either the SCS curve method or the rational method
may be used. The rational method can only be used for watersheds less
than 200 acres in size.
No landowner or land operator may undertake a land development activity without obtaining a permit from the Village of Allouez under Chapters
200 and
387 of this Code prior to commencing the proposed activity. Refer to those chapters for the requirements of the permits.