2016-640 ORDINANCE NO. 2016 -640
An ordinance updating Janesville's Post Construction Stormwater Management Ordinance to
reflect changes in the NR151 Stormwater Regulations, with penalties and other relief for
violations thereof as set forth in JGO 15.06.130.
THE COMMON COUNCIL OF THE CITY OF JANESVILLE DO ORDAIN AS FOLLOWS:
SECTION I. Chapter 15.06 of the Code of General Ordinances of the City of Janesville is
hereby repealed and recreated to read as follows:
CHAPTER 15.06
POST - CONSTRUCTION STORM WATER MANAGEMENT ORDINANCE
Sections:
15.06.010 Authority
15.06.020 Findings of Fact — Purpose — Intent
15.06.030 Applicability and Jurisdiction
15.06.040 Definitions
15.06.050 Applicability of Maximum Extent Practicable
15.06.060 Technical Standards
15.06.070 Performance Standards
15.06.080 Permitting Requirements, Procedures and Fees
15.06.090 Storm Water Management Plan
15.06.100 Maintenance Agreement
15.06.110 Financial Guarantee
15.06.120 Fee Schedule
15.06.130 Enforcement
15.06.140 Appeals
15.06.150 Severability
15.06.010 AUTHORITY.
(1) This Chapter is adopted by the Common Council under the authority granted by s.
62.234, Wis. Stats. This Chapter supersedes all provisions of a Chapter or ordinance
previously enacted under s. 62.23, Wis. Stats., that relate to storm water management
regulations. Except as otherwise specified in s. 62.234, Wis. Stats., s. 62.23, Wis.
Stats., applies to this Chapter and to any amendments to this Chapter.
(2) The provisions of this Chapter are deemed not to limit any other lawful regulatory
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powers of the same governing body.
(3) The Common Council hereby designates the Director of Public Works, hereafter
referred to as the Director, to administer and enforce the provisions of this Chapter.
(4) The requirements of this Chapter do not pre -empt more stringent storm water
management requirements that may be imposed by any of the following:
(a) Wisconsin Department of Natural Resources administrative rules, permits or
approvals including those authorized under ss. 281.16 and 283.33, Wis.
Stats.
(b) Targeted non - agricultural performance standards promulgated in rules by the
Wisconsin Department of Natural Resources under s. NR 151.004, Wis. Adm.
Code.
15.06.020 FINDINGS OF FACT — PURPOSE - INTENT
The Common Council acknowledges that uncontrolled, post- construction runoff 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 post- construction runoff can:
(1) Degrade physical stream habitat by increasing stream bank erosion, increasing
streambed scour, diminishing groundwater recharge, diminishing stream base flows
and increasing stream temperature.
(2) Diminish the capacity of lakes and streams to support fish, aquatic life, recreational
and water supply uses by increasing pollutant loading of sediment, suspended
solids, nutrients, heavy metals, bacteria, pathogens and other urban pollutants.
(3) Alter wetland communities by changing wetland hydrology and by increasing pollutant
loads.
(4) Reduce the quality of groundwater by increasing pollutant loading.
(5) Threaten public health, safety, property and general welfare by overtaxing
storm sewers, drainage ways, and other minor drainage facilities.
The general purpose of this Chapter is to establish long -term, post- construction runoff
management requirements that will diminish the threats to public health, safety, welfare
and the aquatic environment. Specific purposes are to:
(1) Further the maintenance of safe and healthful conditions.
(2) Prevent and control the adverse effects of storm water; prevent and control soil
erosion; prevent and control water pollution; protect spawning grounds, fish and
aquatic life; control building sites, placement of structures and land uses; preserve
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ground cover and scenic beauty; and promote sound economic growth.
(3) Control exceedance of the safe capacity of existing drainage facilities and receiving
water bodies; prevent undue channel erosion; and control increases in the scouring
and transportation of particulate matter.
(4) Minimize the amount of pollutants discharged from the separate storm sewer to
protect the waters of the state.
It is the intent of the Common Council that this Chapter regulates post- construction storm
water discharges to waters of the state. This Chapter may be applied on a site -by -site basis.
The Common Council recognizes, however, that the preferred method of achieving the storm
water performance standards set forth in this Chapter is through the preparation and
implementation of comprehensive, systems -level storm water management plans that cover
hydrologic units, such as watersheds, on a municipal and regional scale. Such plans may
prescribe regional storm water devices, practices or systems, any of which may be designed
to treat runoff from more than one site prior to discharge to waters of the state. Where such
plans are in conformance with the performance standards developed under s. 281.16, Wis.
Stats., for regional storm water management measures it is the intent of this Chapter that the
approved storm water management plan be used to identify post- construction management
measures acceptable for the community.
15.06.030 APPLICABILITY AND JURISDICTION.
(1) APPLICABILITY.
(a) Except as provided under par. (b), this Chapter applies to a post -
construction site whereupon one acre or more of land disturbing
construction activity occurs during construction.
(b) A site that meets any of the criteria in this paragraph is exempt from the
requirements of this Chapter:
1. A post- construction site with less than ten percent connected
imperviousness, based on the area of land disturbance, provided the
cumulative area of all impervious surfaces is less than one acre.
However, the exemption of this paragraph does not include exemption
from the protective area standard of this Chapter.
2. Agricultural facilities and practices.
3. Underground utility construction, but not including the construction of
any above ground structures associated with utility construction.
(c) Notwithstanding the applicability requirements in par. (a), this Chapter applies
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to post- construction sites of any size that, as determined by the Director, are
likely to result in runoff that exceeds the safe capacity of the existing drainage
facilities or receiving body of water, causes undue channel erosion, or
increases water pollution by scouring or the transportation of particulate
matter.
(2) JURISDICTION.
This Chapter applies to post construction sites within the boundaries and jurisdiction of
the City of Janesville;
(3) EXCLUSIONS.
This Chapter is not applicable to activities conducted by a state agency, as defined
under s. 227.01 (1), Wis. Stats.
15.06.040 DEFINITIONS.
(1) "Adequate sod, or self- sustaining vegetative cover" means maintenance of sufficient
vegetation types and densities such that the physical integrity of the streambank or
Lakeshore is preserved. Self- sustaining vegetative cover includes grasses, forbs,
sedges and duff layers of fallen leaves and woody debris.
(2) "Administering authority" means a governmental employee, or a regional planning
commission empowered under s. 62.234, Wis. Stats., that is designated by the
Common Council to administer this Chapter.
(3) "Agricultural facilities and practices" has the meaning given in s. 281.16 (1), Wis. Stats.
(4) "Atlas 14" means the National Oceanic and Atmospheric Administration (NOAA)
Atlas 14 Precipitation- Frequency Atlas of the United States, Volume 8 (Midwestern
States), published in 2013.
(5) "Average annual rainfall" means a typical calendar year of precipitation as determined
by the Wisconsin Department of Natural Resources for users of models such as
WinSLAMM, P8 or equivalent methodology. The average annual rainfall is chosen
from a department publication for the location closest to the municipality.
(6) "Best management practice" or "BMP" means structural or non - structural measures,
practices, techniques or devices employed to avoid or minimize sediment or
pollutants carried in runoff to waters of the state.
(7) "Business day" means a day the office of the Director of Public Works is routinely and
customarily open for business.
(8) "Cease and desist order" means a court- issued order to halt land disturbing
construction activity that is being conducted without the required permit or in
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violation of a permit issued by the Director of Public Works.
(9) "Combined sewer system" means a system for conveying both sanitary sewage and
storm water runoff.
(10) "Connected imperviousness" means an impervious surface connected to the waters
of the state via a separate storm sewer, an impervious flow path, or a minimally
pervious flow path.
(11) "Design storm" means a hypothetical discrete rainstorm characterized by a
specific duration, temporal distribution, rainfall intensity, return frequency and
total depth of rainfall.
(12) "Development" means residential, commercial, industrial or institutional land uses and
associated roads.
(13) "Direct conduits to groundwater" means wells, sinkholes, swallets, fractured
bedrock at the surface, mine shafts, non - metallic mines, tile inlets discharging to
groundwater, quarries, or depressional groundwater recharge areas over
shallow fractured bedrock.
(14) "Effective infiltration area" means the area of the infiltration system that is used to
infiltrate runoff and does not include the area used for site access, berms or
pretreatment.
(15) "Erosion" means the process by which the land's surface is worn away by the
action of wind, water, ice or gravity.
(16) "Exceptional resource waters" means waters listed in s. NR 102.11, Wis. Adm. Code.
(17) "Filtering layer" means soil that has at least a 3 -foot deep layer with at least 20 percent
fines; or at least a 5 -foot deep layer with at least 10 percent fines; or an engineered
soil with an equivalent level of protection as determined by the regulatory authority
for the site.
(18) "Final stabilization" means that all land disturbing construction activities at the
construction site have been completed and that a uniform perennial vegetative
cover has been established with a density of at least 70 percent of the cover for the
unpaved areas and areas not covered by permanent structures or that employ
equivalent permanent stabilization measures.
(19) "Financial guarantee" means a performance bond, maintenance bond, surety bond,
irrevocable letter of credit, or similar guarantees submitted to the Director of Public
Works by the responsible party to assure that requirements of the Chapter are
carried out in compliance with the storm water management plan.
(20) "Governing body" means the Common Council of the City of Janesville.
(21) "Impervious surface" means an area that releases as runoff all or a large portion
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of the precipitation that falls on it, except for frozen soil. Rooftops, sidewalks,
driveways, gravel or paved parking lots and streets are examples of areas that
typically are impervious.
(22) "In -fill" means an undeveloped area of land located within an existing urban sewer
service area, surrounded by development or development and natural or man-
made features where development cannot occur.
(23) "Infiltration" means the entry of precipitation or runoff into or through the soil.
(24) "Infiltration system" means a device or practice such as a basin, trench, rain garden
or swale designed specifically to encourage infiltration, but does not include natural
infiltration in pervious surfaces such as lawns, redirecting of rooftop downspouts
onto lawns or minimal infiltration from practices, such as swales or road side
channels designed for conveyance and pollutant removal only.
(25) "Land disturbing construction activity" means any man -made alteration of the land
surface resulting in a change in the topography or existing vegetative or non -
vegetative soil cover, that may result in runoff and lead to an increase in soil
erosion and movement of sediment into waters of the state. Land disturbing
construction activity includes clearing and grubbing, demolition, excavating, pit
trench dewatering, filling and grading activities.
(26) "Landowner" means any person holding fee title, an easement or other interest in
property, which allows the person to undertake cropping, livestock management,
land disturbing construction activity or maintenance of storm water BMPs on the
property.
(27) "Maintenance agreement" means a legal document that provides for long -term
maintenance of storm water management practices.
(28) "Maximum extent practicable" means the highest level of performance that is
achievable but is not equivalent to a performance standard identified in this Chapter
as determined in accordance with 15.06.050 of this Chapter.
(29) "New development" means development resulting from the conversion of previously
undeveloped land or agricultural land uses.
(30) "NRCS MSE3 distribution" means a specific precipitation distribution developed by
the United States Department of Agriculture, Natural Resources Conservation
Service, using precipitation data from Atlas 14.
(31) "Off- site" means located outside the property boundary described in the permit
application.
(32) "On- site" means located within the property boundary described in the permit
application.
(33) "Ordinary high -water mark" has the meaning given in s. NR 115.03 (6), Wis. Adm.
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Code.
(34) "Outstanding resource waters" means waters listed in s. NR 102.10, Wis. Adm. Code.
(35) "Percent fines" means the percentage of a given sample of soil, which passes
through a # 200 sieve.
(36) "Performance standard" means a narrative or measurable number specifying
the minimum acceptable outcome for a facility or practice.
(37) "Permit" means a written authorization made by the [administering authority] to the
applicant to conduct land disturbing construction activity or to discharge post -
construction runoff to waters of the state.
(38) "Permit administration fee" means a sum of money paid to the [administering
authority] by the permit applicant for the purpose of recouping the expenses
incurred by the authority in administering the permit.
(39) "Pervious surface" means 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.
(40) "Pollutant" has the meaning given in s. 283.01 (13), Wis. Stats.
(41) "Pollution" has the meaning given in s. 281.01 (10), Wis. Stats.
(42) "Post- construction site" means a construction site following the completion of
land disturbing construction activity and final site stabilization.
(43) "Pre- development condition" means 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.
(44) "Preventive action limit" has the meaning given in s. NR 140.05 (17), Wis. Adm. Code.
(45) "Protective area" means an area of land that commences at the top of the
channel of lakes, streams and rivers, or at the delineated boundary of wetlands,
and that is the greatest of the following widths, as measured horizontally from the
top of the channel or delineated wetland boundary to the closest impervious
surface.
(46) "Redevelopment" means areas where development is replacing older development.
(47) "Responsible party" means the landowner or any other entity performing services
to meet the requirements of this Chapter through a contract or other agreement.
"Runoff' means storm water or precipitation including rain, snow or ice melt or
similar water that moves on the land surface via sheet or channelized flow.
(48) "Separate storm sewer" means a conveyance or system of conveyances including
roads with drainage systems, streets, catch basins, curbs, gutters, ditches,
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constructed channels or storm drains, which meets all of the following criteria:
(a) Is designed or used for collecting water or conveying runoff.
(b) Is not part of a combined sewer system.
(c) Is not part of a publicly owned wastewater treatment works that provides
secondary or more stringent treatment.
(d) Discharges directly or indirectly to waters of the state.
(49) "Silviculture activity" means activities including tree nursery operations, tree harvesting
operations, reforestation, tree thinning, prescribed burning, and pest and fire
control. Clearing and grubbing of an area of a construction site is not a silviculture
activity.
(50) "Site" means the entire area included in the legal description of the land on
which the land disturbing construction activity occurred.
(51) "Stop work order" means an order issued by the Director of Public Works which
requires that all construction activity on the site be stopped.
(52) "Storm water management plan" means a comprehensive plan designed to reduce
the discharge of pollutants from storm water, after the site has undergone final
stabilization, following completion of the construction activity.
(53) "Storm water management system plan" is a comprehensive plan designed to
reduce the discharge of runoff and pollutants from hydrologic units on a
regional or municipal scale.
(54) "Technical standard" means a document that specifies design, predicted
performance and operation and maintenance specifications for a material,
device or method.
(55) "Top of the channel" means an edge, or point on the landscape landward from the
ordinary high -water mark of a surface water of the state, where the slope of the land
begins to be less than 12 percent continually for at least 50 feet. If the slope of the
land is 12 percent or less continually for the initial 50 feet landward from the
ordinary high -water mark, the top of the channel is the ordinary high -water mark.
(56) "Total maximum daily load" or "TMDL" means the amount of pollutants specified as a
function of one or more water quality parameters, that can be discharged per day
into a water quality limited segment and still ensure attainment of the applicable
water quality standard.
(57) "TR -55" means 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, which is
incorporated by reference for this chapter.
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(58) "Transportation facility" means a highway, a railroad, a public mass transit facility, a
public -use airport, a public trail or any other public work for transportation purposes
such as harbor improvements under s. 85.095 (1)(b), Wis. Stats. "Transportation
facility" does not include building sites for the construction of public buildings and
buildings that are places of employment that are regulated by the Department
pursuant to s. 281.33, Wis. Stats.
(59) "TSS" means total suspended solids.
(60) "Type II distribution" means a rainfall type curve as established in the "United States
Department of Agriculture, Soil Conservation Service, Technical Paper 149,
published in 1973 ".
(61) "Waters of the state" includes those portions of Lake Michigan and Lake Superior
within the boundaries of this state, and all lakes, bays, rivers, streams, springs,
ponds, wells, impounding reservoirs, marshes, watercourses, drainage systems
and other surface water or groundwater, natural or artificial, public or private,
within this state or its jurisdiction.
15.06.050 APPLICABILITY OF MAXIMUM EXTENT PRACTICABLE.
Maximum extent practicable applies when a person who is subject to a performance standard
of this Chapter demonstrates to the Director's satisfaction that a performance standard is not
achievable and that a lower level of performance is appropriate. In making the assertion that a
performance standard is not achievable and that a level of performance different from the
performance standard is the maximum extent practicable, the responsible party shall take
into account the best available technology, cost effectiveness, geographic features, and other
competing interests such as protection of public safety and welfare, protection of endangered
and threatened resources, and preservation of historic properties.
15.06.060 TECHNICAL STANDARDS.
The following methods shall be used in designing the water quality, peak discharge, and
infiltration components of storm water practices needed to meet the water quality standards
of this Chapter:
(1) Consistent with the technical standards identified, developed or disseminated by the
Wisconsin Department of Natural Resources under subchapter V of chapter NR
151, Wis. Adm. Code.
(2) Where technical standards have not been identified or developed by the Wisconsin
Department of Natural Resources, other technical standards may be used provided
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that the methods have been approved by the Director.
15.06.070 PERFORMANCE STANDARDS.
(1) RESPONSIBLE PARTY. The responsible party shall comply with this section.
(2) STORM WATER MANAGEMENT PLAN. A written storm water management plan in
accordance with 15.06.090 shall be developed and implemented for each post -
construction site.
(3) MAINTENANCE OF EFFORT. For redevelopment sites where the redevelopment
will be replacing older development that was subject to post- construction
performance standards of NR 151 in effect on or after October 1, 2004, the
responsible party shall meet the total suspended solids reduction, peak flow control,
infiltration, and protective areas standards applicable to the older development or
meet the redevelopment standards of this Chapter, whichever is more stringent.
(4) REQUIREMENTS. The storm water management plan required under sub. (2) shall
include the following:
(a) TOTAL SUSPENDED SOLIDS. BMPs shall be designed, installed and
maintained to control total suspended solids carried in runoff from the post -
construction site as follows:
1. BMPs shall be designed in accordance with Table 1. or to the
maximum extent practicable as provided in subd. 2. The design
shall be based on an average annual rainfall, as compared to no
runoff management controls.
Table 1. TSS Reduction Standards
Development Type TSS Reduction
New Development I 80 percent
In -fill development 80 percent
Redevelopment 40 percent of load from parking areas and
2. Maximum Extent Practicable. If the design cannot meet a total
suspended solids reduction performance standard of Table 1., the
storm water management plan shall include a written, site - specific
explanation of why the total suspended solids reduction performance
standard cannot be met and why the total suspended solids load will
be reduced only to the maximum extent practicable.
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3. Off -Site Drainage. When designing BMPs, runoff draining to the BMP
from off- site shall be taken into account in determining the treatment
efficiency of the practice. Any impact on the efficiency shall be
compensated for by increasing the size of the BMP accordingly.
(b) PEAK DISCHARGE.
1. By design, BMPs shall be employed to maintain or reduce the 1 -year,
2 -year, 10 -year, and 100 -year; 24 -hour post- construction peak runoff
discharge rates to the equivalent 24 -hour pre - development peak runoff
discharge rates respectively, or to the maximum extent practicable.
The runoff curve numbers in Table 2. shall be used to represent the
actual pre - development conditions. Peak discharges shall be
calculated using TR -55 runoff curve number methodology, Atlas 14
precipitation depths, and the NRCS Wisconsin MSE3 precipitation
distribution.
Table 2. Maximum Pre - Development Runoff Curve Numbers
Runoff Curve Hydrologic Soil Group
A B C D
Woodland 30 55 70 77
Grassland 39 61 71 78
Cropland 55 69 78 83
2. This subsection of the Chapter does not apply to any of the following:
a. A post- construction site where the discharge is directly into a lake
over 5,000 acres or a stream or river segment draining more than
500 square miles.
b. Except as provided under 15.06.070 (3), a redevelopment post -
construction site.
c. An in -fill development area less than 5 acres.
(c) INFILTRATION.
1. Best Management Practices. BMPs shall be designed, installed, and
maintained to infiltrate runoff in accordance with the following or to the
maximum extent practicable:
a. Low imperviousness. For development up to 40 percent
connected imperviousness, such as parks, cemeteries, and low
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density residential development, infiltrate sufficient runoff volume
so that the post- development infiltration volume shall be at least
90 percent of the pre- development infiltration volume, based on
an average annual rainfall. However, when designing appropriate
infiltration systems to meet this requirement, no more than one
percent of the post- construction site is required as an effective
infiltration area.
b. Moderate imperviousness. For development with more than 40
percent and up to 80 percent connected imperviousness, such as
medium and high density residential, multi - family development,
industrial and institutional development, and office parks, infiltrate
sufficient runoff volume so that the post - development infiltration
volume shall be at least 75 percent of the pre - development
infiltration volume, based on an average annual rainfall. However,
when designing appropriate infiltration systems to meet this
requirement, no more than 2 percent of the post- construction site
is required as an effective infiltration area.
c. High imperviousness. For development with more than 80 percent
connected imperviousness, such as commercial strip malls,
shopping centers, and commercial downtowns, infiltrate sufficient
runoff volume so that the post - development infiltration volume shall
be at least 60 percent of the pre - development infiltration volume,
based on an average annual rainfall. However, when designing
appropriate infiltration systems to meet this requirement, no more
than 2 percent of the post- construction site is required as an
effective infiltration area.
2. Pre - development. The pre - development condition shall be the same as
specified in Table 2 of the Peak Discharge section of this Chapter.
3. Source Areas.
a. Prohibitions. Runoff from the following areas may not be
infiltrated and may not qualify as contributing to meeting the
requirements of this section unless demonstrated to meet the
conditions identified in 15.06.070 (4)(c)6.:
i. Areas associated with a tier 1 industrial facility identified in s. NR
216.21 (2)(a), including storage, loading and parking. Rooftops
may be infiltrated with the concurrence of the regulatory
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authority.
ii. Storage and loading areas of a tier 2 industrial facility identified
in s. NR 216.21 (2)(b).
iii. Fueling and vehicle maintenance areas. Runoff from
rooftops of fueling and vehicle maintenance areas may be
infiltrated with the concurrence of the regulatory authority.
b. Exemptions. Runoff from the following areas may be credited
toward meeting the requirement when infiltrated, but the
decision to infiltrate runoff from these source areas is optional:
i. Parking areas and access roads less than 5,000 square
feet for commercial development.
ii. Parking areas and access roads Tess than 5,000 square feet
for industrial development not subject to the Prohibitions
under par a.
iii. Except as provided under 15.06.070 (3), redevelopment post -
construction sites.
iv. In -fill development areas less than 5 acres.
v. Roads on commercial, industrial and institutional land uses,
and arterial residential roads.
4. Location of Practices.
a. Prohibitions. Infiltration practices may not be located in the
following areas:
i. Areas within 1000 feet upgradient or within 100 feet
downgradient of direct conduits to groundwater.
ii. Areas within 400 feet of a community water system well as
specified in s. NR 811.16 (4) or within the separation
distances listed in s. NR
812.08 for any private well or non - community well for runoff
infiltrated
from commercial, including multi - family residential, industrial
and institutional land uses or regional devices for one- and
two - family residential development.
iii. Areas where contaminants of concern, as defined in s. NR
720.03 (2), are present in the soil through which infiltration
will occur.
b. Separation distances.
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i. Infiltration practices shall be located so that the characteristics
of the soil and the separation distance between the bottom of
the infiltration system and the elevation of seasonal high
groundwater or the top of bedrock are in accordance with
Table 3:
Table 3. Separation Distances and Soil Characteristics
Source Area Separation Distance Soil Characteristics
Industrial, Commercial,
Institutional Parking Lots and 5 feet or more Filtering Layer
Residential Arterial Roads 5 feet or more Filtering Layer
Native or Engineered
Roofs Draining to Subsurface 1 foot or more Soil with Particles
Infiltration Practices Finer than Coarse
Roofs Draining to Surface
Infiltration Practices Not Applicable Not Applicable
All Other Impervious Source Areas 3 feet or more Filtering Layer
ii. Notwithstanding par. b., applicable requirements for injection
wells classified under ch. NR 815 shall be followed.
c. Infiltration rate exemptions. Infiltration practices located in the
following areas may be credited toward meeting the requirements
under the following conditions, but the decision to infiltrate under
these conditions is optional:
i. Where the infiltration rate of the soil measured at the
proposed bottom of the infiltration system is less than 0.6
inches per hour using a scientifically credible field test
method.
ii. Where the least permeable soil horizon to 5 feet below the
proposed bottom of the infiltration system using the U.S.
Department of Agriculture method of soils analysis is one of the
following: sandy clay loam, clay loam, silty clay loam, sandy clay,
silty clay, or clay.
5. Alternate Use. Where alternate uses of runoff are employed, such as for
toilet flushing, laundry, or irrigation or storage on green roofs where an
equivalent portion of the runoff is captured permanently by rooftop
vegetation, such alternate use shall be given equal credit toward the
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infiltration volume required by this section.
6. Groundwater Standards.
a. Infiltration systems designed in accordance with this section shall, to
the extent technically and economically feasible, minimize the level of
pollutants infiltrating to groundwater and shall maintain compliance
with the preventive action limit at a point of standards application in
accordance with ch. NR 140. However, if site specific information
indicates that compliance with a preventive action limit is not
achievable, the infiltration BMP may not be installed or shall be
modified to prevent infiltration to the maximum extent practicable.
b. Notwithstanding par. a., the discharge from BMPs shall remain below
the enforcement standard at the point of standards application.
7. Pretreatment. Before infiltrating runoff, pretreatment shall be required for
parking lot runoff and for runoff from new road construction in commercial,
industrial and institutional areas that will enter an infiltration system. The
pretreatment shall be designed to protect the infiltration system from
clogging prior to scheduled maintenance and to protect groundwater
quality in accordance with subd. 6. Pretreatment options may include, but
are not limited to, oil and grease separation, sedimentation, biofiltration,
filtration, swales or filter strips.
8. Maximum Extent Practicable. Where the conditions of subd. 3. and 4.
limit or restrict the use of infiltration practices, the performance standard
of NR 151.124 shall be met to the maximum extent practicable.
(d) PROTECTIVE AREAS.
1. Definition. In this section, "protective area" means an area of land that
commences at the top of the channel of lakes, streams and rivers, or at the
delineated boundary of wetlands, and that is the greatest of the following
widths, as measured horizontally from the top of the channel or delineated
wetland boundary to the closest impervious surface. However, in this
section, "protective area" does not include any area of land adjacent to
any stream enclosed within a pipe or culvert, so that runoff cannot enter
the enclosure at this location.
a. For outstanding resource waters and exceptional resource
waters, 75 feet.
b. For perennial and intermittent streams identified on a U.S.
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Geological Survey 7.5- minute series topographic map, or a county
soil survey map, whichever is more current, 50 feet.
c. For lakes, 50 feet.
d. For wetlands not subject to par. e. or f., 50 feet.
e. For highly susceptible wetlands, 75 feet. Highly susceptible
wetlands include the following types: calcareous fens, sedge
meadows, open and coniferous bogs, low prairies, coniferous
swamps, lowland hardwood swamps, and ephemeral ponds.
f. For less susceptible wetlands, 10 percent of the average wetland
width, but no less than 10 feet nor more than 30 feet. Less
susceptible wetlands include: degraded wetland dominated by
invasive species such as reed canary grass; cultivated hydric soils;
and any gravel pits, or dredged material or fill material disposal
sites that take on the attributes of a wetland.
g. In pars. d. to f., determinations of the extent of the protective area
adjacent to wetlands shall be made on the basis of the sensitivity
and runoff susceptibility of the wetland in accordance with the
standards and criteria in s. NR 103.03.
h. Wetland boundary delineation shall be made in accordance with s.
NR
103.08 (1 m). This paragraph does not apply to wetlands that have
been completely filled in compliance with all applicable state and
federal regulations. The protective area for wetlands that have
been partially filled in compliance with all applicable state and
federal regulations shall be measured from the wetland boundary
delineation after a fill has been placed. Where there is a legally
authorized wetland fill, the protective area standard need not be
met in that location.
For concentrated flow channels with drainage areas greater than
130 acres, 10 feet.
j. Notwithstanding pars. a. to i., the greatest protective area width
shall apply where rivers, streams, lakes and wetlands are
contiguous.
2. Applicability. This section applies to post- construction sites located
within a protective area, except those areas exempted pursuant to
subd. 4.
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3. Requirements. The following requirements shall be met:
a. Impervious surfaces shall be kept out of the protective area entirely
or to the maximum extent practicable. If there is no practical
alternative to locating an impervious surface in the protective area,
the storm water management plan shall contain a written, site -
specific explanation.
b. Where land disturbing construction activity occurs within a protective
area, adequate sod or self- sustaining vegetative cover of 70 percent
or greater shall be established and maintained where no impervious
surface is present. The adequate sod or self- sustaining vegetative
cover shall be sufficient to provide for bank stability, maintenance of
fish habitat, and filtering of pollutants from upslope overland flow
areas under sheet flow conditions. Non - vegetative materials, such
as rock riprap, may be employed on the bank as necessary to
prevent erosion such as on steep slopes or where high velocity
flows occur.
c. BMPs such as filter strips, swales, or wet detention ponds, that are
designed to control pollutants from non -point sources, may be
located in the protective area.
4. Exemptions. This section does not apply to any of the following:
a. Except as provided under 15.06.070 (3), redevelopment post -
construction sites.
b. In -fill development areas less than 5 acres.
c. Structures that cross or access surface water such as boat
landings, bridges, and culverts.
d. Structures constructed in accordance with s. 59.692 (1v), Stats.
e. Areas of post- construction sites from which the runoff does not
enter the surface water, including wetlands, without first being
treated by a BMP to meet the local ordinance requirements for
total suspended solids and peak flow reduction, except to the
extent that vegetative ground cover is necessary to maintain bank
stability.
(e) FUELING AND MAINTENANCE AREAS. Fueling and vehicle maintenance areas
shall have BMPs designed, installed, and maintained to reduce petroleum within
runoff, so that the runoff that enters waters of the state contains no visible
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petroleum sheen, or to the maximum extent practicable.
(5) GENERAL CONSIDERATIONS FOR STORM WATER MANAGEMENT
MEASURES. The following considerations shall be observed in on -site and off -
site runoff management:
(a) Natural topography and land cover features such as natural swales, natural
depressions, native soil infiltrating capacity, and natural groundwater recharge
areas shall be preserved and used, to the extent possible, to meet the
requirements of this section.
(b) Emergency overland flow for all storm water facilities shall be provided to
prevent exceeding the safe capacity of downstream drainage facilities and
prevent endangerment of downstream property or public safety.
(6) BMP LOCATION.
(a) To comply with the performance standards required under 15.06.070 of this
Chapter, BMPs may be located on —site or off —site as part of a regional storm
water device, practice or system, but shall be installed in accordance with s.
NR 151.003, Wis. Adm. Code.
(b) The Director may approve off -site management measures provided that all of
the following conditions are met:
1. The Director determines that the post- construction runoff is covered
by a storm water management system plan that is approved by the
City of Janesville and that contains management requirements
consistent with the purpose and intent of this Chapter.
2. The off -site facility meets all of the following conditions:
a. The facility is in place.
b. The facility is designed and adequately sized to provide a level
of storm water control equal to or greater than that which
would be afforded by on -site practices meeting the
performance standards of this Chapter.
c. The facility has a legally obligated entity responsible for its
long -term operation and maintenance.
(c) Where a regional treatment option exists such that the Director exempts the
applicant from all or part of the minimum on -site storm water management
requirements, the applicant may be required to pay a fee in an amount
determined in negotiation with the Director. In determining the fee for post -
construction runoff, the Director shall consider an equitable distribution of the
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cost for land, engineering design, construction, and maintenance of the
regional treatment option.
(7) ADDITIONAL REQUIREMENTS. The Director may establish storm water
management requirements more stringent than those set forth in this Chapter if
the Director determines that the requirements are needed to control storm water
quantity or control flooding, comply with federally approved total maximum daily
load requirements, or control pollutants associated with existing development or
redevelopment.
15.06.080 PERMITTING REQUIREMENTS, PROCEDURES AND FEES.
(1) PERMIT REQUIRED. No responsible party may undertake a land disturbing
construction activity without receiving a post- construction runoff permit from the
Director prior to commencing the proposed activity.
(2) PERMIT APPLICATION AND FEES. Unless specifically excluded by this
Chapter, any responsible party desiring a permit shall submit to the Director a
permit application on a form provided by the Director for that purpose.
(a) Unless otherwise excluded by this Chapter, a permit application must be
accompanied by a storm water management plan, a maintenance agreement
and a non - refundable permit administration fee.
(b) The storm water management plan shall be prepared to meet the
requirements of 15.06.070 and 15.06.090, the maintenance agreement shall
be prepared to meet the requirements of 15.06.100, the financial guarantee
shall meet the requirements of 15.06.110, and fees shall be those as set forth
in 15.06.120.
(3) PERMIT APPLICATION REVIEW AND APPROVAL. The Director shall review any
permit application that is submitted with a storm water management plan,
maintenance agreement, and the required fee. The following approval procedure
shall be used:
(a) Within fifteen (15) business days of the receipt of a complete permit application,
including all items as required by sub. (2), the Director shall inform the
applicant whether the application, storm water management plan and
maintenance agreement are approved or disapproved based on the
requirements of this Chapter.
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(b) If the storm water permit application, storm water management plan and
maintenance agreement are approved, or if an agreed upon payment of
fees in lieu of storm water management practices is made, the Director
shall issue the permit.
(c) If the storm water permit application, storm water management plan or
maintenance agreement is disapproved, the Director shall detail in writing the
reasons for disapproval.
(d) The Director may request additional information from the applicant. If
additional information is submitted, the Director shall have fifteen (15)
business days from the date the additional information is received to inform
the applicant that the storm water management plan and maintenance
agreement are either approved or disapproved.
(e) Failure by the Director to inform the permit applicant of a decision within
fifteen (15) business days of a required submittal shall be deemed to mean
approval of the submittal and the applicant may proceed as if a permit had
been issued.
(4) PERMIT REQUIREMENTS. All permits issued under this Chapter shall be subject to
the following conditions, and holders of permits issued under this Chapter shall be
deemed to have accepted these conditions. The Director may suspend or revoke a
permit for violation of a permit condition, following written notification of the
responsible party. An action by the Director to suspend or revoke this permit may be
appealed in accordance with 15.06.140.
(a) Compliance with this permit does not relieve the responsible party of the
responsibility to comply with other applicable federal, state, and local laws
and regulations.
(b) The responsible party shall design and install all structural and non - structural
storm water management measures in accordance with the approved storm
water management plan and this permit.
(c) The responsible party shall notify the Director at least two (2) business days
before commencing any work in conjunction with the storm water
management plan, and within two (2) business days upon completion of the
storm water management practices. If required as a special condition under
sub. (5), the responsible party shall make additional notification according to
a schedule set forth by the Director so that practice installations can be
inspected during construction.
(d) Practice installations required as part of this Chapter shall be certified "as built"
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or "record" drawings by the responsible party. Completed storm water
management practices must pass a final inspection by the Director or its
designee to determine if they are in accordance with the approved storm water
management plan and Chapter. The Director shall notify the responsible party
in writing of any changes required in such practices to bring them into
compliance with the conditions of this permit.
(e) The responsible party shall notify the Director of any significant modifications
it intends to make to an approved storm water management plan. The
Director may require that the proposed modifications be submitted to it for
approval prior to incorporation into the storm water management plan and
execution by the responsible party.
(f) The responsible party shall maintain all storm water management practices in
accordance with the storm water management plan until the practices are
transferred to subsequent owners as specified in the approved maintenance
agreement.
(g) The responsible party authorizes the Director to perform any work or
operations necessary to bring storm water management measures into
conformance with the approved storm water management plan, and consents
to a special assessment or charge against the property as authorized under
subch. VII of ch. 66, Wis. Stats., or to charging such costs against the financial
guarantee posted under 15.06.110.
(h) If so directed by the Director, the responsible party shall repair at the
responsible party's own expense all damage to adjoining municipal facilities
and drainage ways caused by runoff, where such damage is caused by
activities that are not in compliance with the approved storm water
management plan.
(i) The responsible party shall permit property access to the Director for the
purpose of inspecting the property for compliance with the approved storm
water management plan and this permit.
(j) Where site development or redevelopment involves changes in direction,
increases in peak rate and /or total volume of runoff from a site, the Director
may require the responsible party to make appropriate legal arrangements
with affected property owners concerning the prevention of endangerment to
property or public safety.
(k) The responsible party is subject to the enforcement actions and penalties
detailed in 15.06.130, if the responsible party fails to comply with the terms
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of this permit.
(5) PERMIT CONDITIONS. Permits issued under this subsection may include conditions
established by Director in addition to the requirements needed to meet the
performance standards in 15.06.070 or a financial guarantee as provided for in
15.06.110.
(6) PERMIT DURATION. Permits issued under this section shall be valid from the date
of issuance through the date the Director notifies the responsible party that all storm
water management practices have passed the final inspection required under sub.
(4)(d).
15.06.090 STORM WATER MANAGEMENT PLAN.
(1) STORM WATER MANAGEMENT PLAN REQUIREMENTS. The storm water
management plan required under 15.06.070(2) shall contain at a minimum the
following information:
(a) Name, address, and telephone number for the following or their designees:
landowner; developer; project engineer for practice design and certification;
person(s) responsible for installation of storm water management practices; and
person(s) responsible for maintenance of storm water management practices
prior to the transfer, if any, of maintenance responsibility to another party.
(b) A proper legal description of the property proposed to be developed, referenced to
the
U.S. Public Land Survey system or to block and lot numbers within a recorded
land subdivision plat.
(c) Pre - development site conditions, including:
1. One or more site maps at a scale of not less than 1 inch equals 100 feet.
The site maps shall show the following: site location and legal property
description; predominant soil types and hydrologic soil groups; existing
cover type and condition; topographic contours of the site at an interval not
to exceed two ( 2 ) feet; topography and drainage network including
enough of the contiguous properties to show runoff patterns onto, through,
and from the site; watercourses that may affect or be affected by runoff
from the site; flow path and direction for all storm water conveyance
sections; watershed boundaries used in hydrology determinations to show
compliance with performance standards; lakes, streams, wetlands,
channels, ditches, and other watercourses on and immediately adjacent to
the site; limits of the 100 year floodplain; location of wells and wellhead
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protection areas covering the project area and delineated pursuant to s.
NR 811.16, Wis. Adm. Code.
2. Hydrology and pollutant loading computations as needed to show
compliance with performance standards. All major assumptions used in
developing input parameters shall be clearly stated. The geographic
areas used in making the calculations shall be clearly cross - referenced
to the required map(s).
(d) Post - development site conditions, including:
1. Explanation of the provisions to preserve and use natural topography
and land cover features to minimize changes in peak flow runoff rates
and volumes to surface waters and wetlands.
2. Explanation of any restrictions on storm water management measures
in the development area imposed by wellhead protection plans and
ordinances.
3. One or more site maps at a scale of not less than 1 inch equals 100 feet
showing the following: post- construction pervious areas including
vegetative cover type and condition; impervious surfaces including all
buildings, structures, and pavement; post- construction topographic
contours of the site at an interval not to exceed two (2) feet; post -
construction drainage network including enough of the contiguous
properties to show runoff patterns onto, through, and from the site;
locations and dimensions of drainage easements; locations of maintenance
easements specified in the maintenance agreement; flow path and
direction for all storm water conveyance sections; location and type of all
storm water management conveyance and treatment practices, including
the on -site and off -site tributary drainage area; location and type of
conveyance system that will carry runoff from the drainage and treatment
practices to the nearest adequate outlet such as a curbed street. storm
drain, or natural drainage way; watershed boundaries used in hydrology
and pollutant loading calculations and any changes to lakes, streams,
wetlands, channels, ditches, and other watercourses on and immediately
adjacent to the site.
4. Hydrology and pollutant loading computations as needed to show
compliance with performance standards. The computations shall be made
for each discharge point in the development, and the geographic areas
used in making the calculations shall be clearly cross - referenced to the
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required map(s).
5. Results of investigations of soils and groundwater required for the
placement and design of storm water management measures. Detailed
drawings including
cross - sections and profiles of all permanent storm water conveyance and
treatment practices.
(e) A description and installation schedule for the storm water management
practices needed to meet the performance standards in 15.06.070.
(f) A maintenance plan developed for the life of each storm water management
practice including the required maintenance activities and maintenance
activity schedule.
(g) Cost estimates for the construction, operation, and maintenance of each storm
water management practice.
(h) Other information requested in writing by the Director to determine compliance
of the proposed storm water management measures with the provisions of this
Chapter.
(i) All site investigations, plans, designs, computations, and drawings shall be
prepared in accordance with accepted engineering practice and requirements of
this Chapter.
(2) ALTERNATE REQUIREMENTS. The [administering authority] may prescribe
alternative submittal requirements for applicants seeking an exemption to on -site
storm water management performance standards under 15.06.070.
15.06.100 MAINTENANCE AGREEMENT.
(1) MAINTENANCE AGREEMENT REQUIRED. The maintenance agreement required
under 15.06.080 for storm water management practices shall be an agreement
between the Director and the responsible party to provide for maintenance of storm
water practices beyond the duration period of this permit. The maintenance
agreement shall be filed with the County Register of Deeds as a property deed
restriction so that it is binding upon all subsequent owners of the land served by the
storm water management practices.
(2) AGREEMENT PROVISIONS. The maintenance agreement shall contain
the following information and provisions and be consistent with the
maintenance plan required by 15.06.090 (1)(f):
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(a) Identification of the storm water facilities and designation of the drainage area
served by the facilities.
(b) A schedule for regular maintenance of each aspect of the storm water
management system consistent with the storm water management plan
required under 15.06.080 (2).
(c) Identification of the responsible party(s), organization or individual
responsible for long term maintenance of the storm water management
practices identified in the storm water management plan required under
15.06.080 (2).
(d) Requirement that the responsible party(s), organization, or individual shall
maintain storm water management practices in accordance with the
schedule included in par. (b).
(e) Authorization for the Director to access the property to conduct
inspections of storm water management practices as necessary to
ascertain that the practices are being maintained and operated in
accordance with the agreement.
(0 A requirement on the Director to inform the responsible party responsible for
maintenance of the inspection results, and to specifically indicate any
corrective actions required to bring the storm water management practice into
proper working condition.
(g) Agreement that the party designated under par. (c), as responsible for long
term maintenance of the storm water management practices, shall be notified
by the Director of maintenance problems which require correction. The
specified corrective actions shall be undertaken within a reasonable time
frame as set by the Director.
(h) Authorization of the Director to perform the corrected actions identified in the
inspection report if the responsible party designated under par. (c) does not
make the required corrections in the specified time period. The Director shall
enter the amount due on the tax rolls and collect the money as a special
charge against the property pursuant to subch. VII of ch. 66, Wis. Stats.
15.06.110 FINANCIAL GUARANTEE.
(1) ESTABLISHMENT OF THE GUARANTEE. The Director may require the submittal of
a financial guarantee, the form and type of which shall be acceptable to the Director.
The financial guarantee shall be in an amount determined by the Director to be the
estimated cost of construction and the estimated cost of maintenance of the storm
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water management practices during the period which the designated party in the
maintenance agreement has maintenance responsibility. The financial guarantee
shall give the Director the authorization to use the funds to complete the stormwater
management practices if the responsible party defaults or does not properly
implement the approved storm water management plan, upon written notice to the
responsible party by the Director that the requirements of this Chapter have not been
met.
(2) CONDITIONS FOR RELEASE. Conditions for the release of the financial
guarantee are as follows:
(a) The Director shall release the portion of the financial guarantee established
under this section, less any costs incurred by the Director to complete
installation of practices, upon submission of "as built plans" or "record"
drawings by a licensed professional engineer. The Director may make
provisions for a partial pro -rata release of the financial guarantee based on the
completion of various development stages.
(b) The Director shall release the portion of the financial guarantee established
under this section to assure maintenance of storm water practices, less any
costs incurred by the Director, at such time that the responsibility for practice
maintenance is passed on to another entity via an approved maintenance
agreement.
15.06.120 FEE SCHEDULE.
The fees referred to in other sections of this Chapter shall be established by the City Manager
and may from time to time be modified at any time, and the Common Council shall be
advised of the rates. A schedule of the fees established by the City Manager shall be
available for review in the Director's Office.
15.06.130 ENFORCEMENT.
(1) Any land disturbing construction activity or post- construction runoff initiated after the
effective date of this Chapter by any person, firm, association, or corporation subject
to the ordinance provisions shall be deemed a violation unless conducted in
accordance with the requirements of this Chapter.
(2) The Director shall notify the responsible party by in writing of any non - complying land
disturbing construction activity or post- construction runoff. The notice shall describe
the nature of the violation, remedial actions needed, a schedule for remedial action,
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and additional enforcement action which may be taken.
(3) Upon receipt of written notification from the Director under sub. (2), the responsible
party shall correct work that does not comply with the storm water management plan
or other provisions of this permit. The responsible party shall make corrections as
necessary to meet the specifications and schedule set forth by the Director in the
notice.
(4) If the violations to a permit issued pursuant to this Chapter are likely to result in
damage to properties, public facilities, or waters of the state, the Director may enter
the land and take emergency actions necessary to prevent such damage. The costs
incurred by the Director plus interest and legal costs shall be billed to the responsible
party.
(5) The Director is authorized to post a stop work order on all land disturbing
construction activity that is in violation of this Chapter, or to request the City
Attorney to obtain a cease and desist order in any court with jurisdiction.
(6) The Director may revoke a permit issued under this Chapter for non- compliance with
ordinance provisions.
(7) Any permit revocation, stop work order, or cease and desist order shall remain in
effect unless retracted by the Director or by a court with jurisdiction.
(8) The Director is authorized to refer any violation of this Chapter, or a stop work order
or cease and desist order issued pursuant to this Chapter, to the City Attorney for the
commencement of further legal proceedings in any court with jurisdiction.
(9) Any person, firm, association, or corporation who does not comply with the provisions
of this Chapter shall be subject to the relief, enforcement, and penalties set forth in
Chapter 15.80 of the Code of General Ordinances of the City of Janesville, as from
time to time amended, revised, or renumbered. Each day a violation exists shall
constitute a separate offense. Also incorporated herein as if fully set forth verbatim as
additional relief are the provisions set forth in s. 62.23(8) Wis. Stats. 62.23(8), as from
time to time amended, revised, or renumbered.
(10) Compliance with the provisions of this Chapter may also be enforced by injunction in
any court with jurisdiction. It shall not be necessary to prosecute for forfeiture or a
cease and desist order before resorting to injunctional proceedings.
(11) When the Director determines that the holder of a permit issued pursuant to this
Chapter has failed to follow practices set forth in the storm water management plan, or
has failed to comply with schedules set forth in said storm water management plan, the
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Director. or a party designated by the Director may enter upon the land and perform
the work or other operations necessary to bring the condition of said lands into
conformance with requirements of the approved storm water management plan. The
Director shall keep a detailed accounting of the costs and expenses of performing this
work. These costs and expenses shall be deducted from any financial security posted
pursuant to 15.06.110. Where such a security has not been established, or where
such a security is insufficient to cover these costs, the costs and expenses shall be
entered on the tax roll as a special charge against the property and collected with any
other taxes levied thereon for the year in which the work is completed.
15.06.140 APPEALS.
(1) BOARD OF APPEALS. The City Plan Commission shall serve as the Board of
Appeals. The Board of Appeals:
(a) Shall hear and decide appeals where it is alleged that there is error in any
order, decision or determination made by the Director in administering this
Chapter except for cease and desist orders obtained under 15.06.130 (5).
(b) May authorize, upon appeal, variances from the provisions of this Chapter
which are not contrary to the public interest and where owing to special
conditions a literal enforcement of the provisions of the Chapter will result in
unnecessary hardship; and
(c) Shall use the rules, procedures, duties and powers authorized by statute in
hearing and deciding appeals and authorizing variances.
(2) WHO MAY APPEAL. Appeals to the board of appeals may be taken by any
aggrieved person or by any office, department, or board of the City of Janesville
affected by any decision of the Director.
15.06.150 SEVERABILITY.
If a court of competent jurisdiction judges any section, clause, provision or portion of this
Chapter unconstitutional or invalid, the remainder of the Chapter shall remain in force and
not be affected by such judgment.
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I •
ADOPTED: May 23, 2016 Motion by: Gruber
Second by: Williams
APPROVED: Councilmember Aye Nay Pass Absent
Deupree X
Gruber X
Mark A. reitag, City Manager Jorgensen x
Liebert X
ATTE Marklein X
1110'� - Tidwell X
�� Williams X
Day • Godek, City Clerk- Treasurer
APPROVED AS TO FORM:
Tim Wellnitz, Assistant City Attorney
Proposed by: Engineering
Prepared by: Engineering
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