HomeMy WebLinkAboutStorm Drainage Mapping Report 2002Morehead City
Storm Drainage Mapping Report
May 2002
Prepared by:
amec
The preparation of this report was financed in part through a grant
provided by the North Carolina Coastal Management Program,
through funds provided by the Coastal Zone management Act of 1972,
as amended, which is administered by the Office of Ocean and Coastal
Resource Management, National Oceanic and Atmospheric Administration.
Draft Report
i, C:Cf tiY',;e tt•id.�9!'.C:J!OU:' yji •n'.�Ibt Q::i�L'uL: '".t}; U'(ti.`••''2a}�PCLtC iq�:FJLCI i.•.�LCE+IILr.
3L n ... aCj'a.�' .':F�fiC�. 'titl.I4p1; t@r::�1 �i%� f�?�' � '.IR OF {�r:1�A Ol:•�i � Q7i7_^^,
•yr'.a:.an'r*,.c ' , e i'. COS U4
b<.: •;.,`ac• ; tj� = : ;.ac;p � f.-`nar7 •�;C;r.ret p`�n:aa�;;..,a:n �:n�.r.ua'
10 .
>y A
i�H'.. .. `i'l.tirl lnT .'lln'.+� ��:T.•cA ii`�f,�m:.' If`.. i".IT.
ft
DRAFT
Stormwater Drainage System Mapping
Table of Contents
I. Pilot Inventory of the Storm Drainage System and Review of Existing GIS Data ............ I
II. Storm Drainage System Mapping.....................................................................................1
III. Storm Drainage System Data Collection..........................................................................2
IV. Data Collection Quality Assurance Review......................................................................2
V. Data Collection Statistics................................................................................................. 3
Appendix A
I. Computerized Database for Storm Drainage System Structures ............................... A-1
H. Computerized Database for Storm Drainage Conveyances ... ... ... ... ... ... ... ... ... ... ... ... . A-5
III. Computerized Database for Non-Stormwater Discharges ... ... ... ... ... ... ... ... ... ... ... ... ... A-7
IV. Computerized Database for Best Management Practices ... ... ... ... ... ... ... ... ... ... ... ... .. A-10
Morehead City Storm Drainage System Mapping amec'� page 1-0
Project Summary
DRAFT
Stormwater Drainage System Mapping
I. Pilot Inventory of the Storm Drainage System and Review of Existing GIS Data
On March 2, 2002 a pilot inventory of the storm drainage system was conducted within the
Extraterritorial Jurisdiction (ETJ) of Morehead City to verify existing Global Information
System (GIS) data and to verify the availability of Global Positioning System (GPS) satellites.
Existing GIS maps were compared to the actual system and the locations of structures were
visually verified. General storm drainage problem areas and those areas needing additional data
were noted.
The Existing GIS data showed that the existing storm drainage maps contained only storm
drainage structures and associated piping. The pilot inventory showed that the ETJ's drainage
system is predominately characterized by roadside swales with driveway pipes. It is at points
where the system of driveway pipes and swales are connected to the adjacent storm drainage
systems that storm drainage structures and associated structures are found.
The GPS receivers were tested during the pilot inventory. Several storm drainage features were
mapped at various locations throughout the ETJ and compared to existing GIS data.
In summary the Pilot Inventory provided the following information:
1. GPS receivers function with the associated software databases.
2. The ETJ storm drainage system needs to have the existing data updated and an
extensive amount of additional data needs to be conducted.
3. The storm drainage system within the ETJ is primarily characterized by driveway
pipes and roadside swales.
4. A large percentage of driveway pipes that are present are undersized (6 inches or less)
and made out of plastic.
5. A few residential developments within the ETJ have a "curb and gutter" type storm
drainage system with associated inlets and piping. These systems are localized and
discharge either to Waters of the State or a system of interconnecting swales.
II. Storm Drainage System Mapping
To fulfill portions of the grant provided by the North Carolina Coastal Management Program,
five students were recruited from East Carolina University to assist with the storm drainage
mapping portion of the project. Training for the students was conducted on Sunday March 10,
Morehead City Storm Drainage System Mapping amee'� Project Summary
page 1-1
DRAFT
2002 in Morehead City. The training focused on recognizing specific storm drainage features,
how to collect the data and how to record the data in the correct database fields. Training was
also provided on how to recognize, classify and record possible storm drainage system problem
areas including: illicit connections to the storm drainage system, structural problems, sediment
problems, blockage problems and general maintenance problems.
Mapping of the storm drainage system was initiated on March 1Ith. Several data collection
teams were created using AMEC staff paired with one or more students. Field data collection
was completed on 23 March 2002.
III. Storm Drainage System Data Collection
Storm drainage data was collected and recorded to a computerized database using Tremble GPS
backpack units connected to Personnel Data Assistants (PDA) loaded with TerraSync °n
software.
Data collection was divided amongst the team members with each team member having a
specific responsibility. One team member was responsible for collecting the GPS location data
and entering data into the computerized database, one team member was responsible making a
backup of the data by writing it on a hard copy map, and one team member was responsible for
taking measurements and determining the condition of the structure or conveyance. At the end
of each day, the data collected by each team was downloaded to a desktop computer using
Tremble GPS Pathfinder Office version 2.80 and an initial quality assurance check of the data
was performed looking for incomplete data fields, system connectivity, etc. Completed
hardcopy maps were collected for later comparison to the computerized database during the final
QA/QC processes.
Data collected by the field teams was dived into four categories: Structures, Conveyances, Non-
Stormwater Discharges, and Best Management Practices. The Individual attributes are listed in
Appendix A.
IV Data Collection Quality Assurance Review
After data collection was completed, a Quality Assurance Review of the collected data was
performed. The data review compared the electronic data collected with the hardcopy field
maps as well as digitizing in creeks and swales that were inaccessible. System wide
connectivity was reviewed and established based on a combination of GIS data collected, field
interviews with local citizens, field maps, existing GIS data and topographic maps. Isolated
storm drainage systems were encountered and if no connectivity could be established or if other
problems usually associated with isolated system were found (such as standing water) then the
storm drainage systems were left as they were mapped.
Morehead City Storm Drainage System Mapping amen page 1-2
Project Summary
DRAFT
V Data Collection Statistics
5,314 Structures and 5,017 Conveyances, 125 Non -Storm Discharges and 11 BMPs were
mapped.
The total length of the system as mapped is 716,050 feet or just over 136 miles of pipes, swales,
creeks and ponds.
Of the 5,017 Conveyances mapped, 410 or 8% have a blockage problem, 698 or 14% have a
ponding problem, 46 or 0.9% are possible non-stormwater discharges, and 39 or 0.8% have a
structural problem. The remaining Conveyances are either listed as having no observed
problems (3,716 - 74%) or are listed as unknown (108 — 2%).
Of the 5,314 Structures mapped 459 or 8% have a blockage problem, 1 has an erosion problem,
323 or 15% have a ponding problem, 60 or 1% have a possible non-stormwater discharge, and
77 or 1% have a structural problem. The rest are listed as having no observed problem (3,654 -
67%) or are listed as unknown (740 —14%).
125 Non-Stormwater connections were mapped. These points as well as the 60 possible non-
stormwater discharges should be further investigated. If they are non-stormwater discharges
then these connections to the storm drainage system should be removed.
Morehead City Storm Drainage System Mapping ame{r page J
Project Summary
DRAFT
Appendix A - Storm Drainage Mapping Databases
Data collected by the field teams was dived into four categories: Structures, Conveyances, Non
Stormwater Discharges, and Best Management Practices. The Individual attributes are
described below.
Computerized Database for Storm Drainage System Structures
The Storm Drainage System Structures were split up into thirteen different categories listed
below.
➢
Bridge End
➢
Manhole/ Junction Box
➢
Curb Inlet — No Grate
➢
Curb inlet — Grate
➢
Control Structure
➢
Open Throat Catch Basin
➢
Curb Cut
➢,
Grate
➢
Headwall
➢
Conveyance End
➢
Pipe End
➢
Hidden Junction Box
➢
Other -See Comments
Each is Described Below
Bridge End
Bridge Ends are used where a significant bridge crosses a swale or stream. It is used primarily
for display purposes so that when the coverages are viewed in ArcView with the associated
aerial photographs as a backdrop, water does not appear to flow "over the bridge".
Manhole/Junction Box
Manhole/ Junction Boxes are structures that do not allow stormwater to enter them except by
way of stormwater pipes. Usually the only access to .these types of structures is by way of a
manhole cover or removable solid concrete top.
Curb Inlet — No Grate and Curb Inlet — Grate
Curb inlets — No Grate are characterized by a structure that primarily allows storm drainage to
enter the structure by way of a rectangular vertical opening and they are usually collocated with
curb and gutter. If the structure has a grate placed horizontally in front of the opening then that
Morehead City Storm Drainage System Mapping page A-1
Appendix A ameO
DRAFT
structure is called a Curb Inlet — Grate.
Control Structure
Control Structures are classified as those structures whose sole purpose is to control the rate of
storm water discharging through them. The most common types included: riser and barrels,
weirs, dams, and emergency spillways. They are usually co -located with retention/ detention
ponds.
Open Throat Catch Basin
Open Throat Catch Basins are characterized by one or (usually) more vertical rectangular
openings with either a solid concrete top or a concrete top with a manhole cover. The top of
these types of structures is usually supported in each comer by bricks. Usually found in roadside
swales or in yards.
Curb Cut
Curb Cuts are usually co -located with curb and gutter. They are an opening made in the curb
that allows storm drainage to discharge through the curb cut and into a natural or man-made
swale.
Grate
A structure that allows storm drainage to enter by passing through a flat horizontal grid is called
a Grate. They are usually found in parking lots or in roadways.
Headwall
A Headwall is described as any form of material purposefully placed at the end of a pipe to
prevent erosion and has a basic vertical form. This excludes riprap and vegetative swale linings
but includes metal, wood, plastic, sandbag, masonry and concrete construction.
Conveyance End
A Conveyance End is placed where two or more swales join, a swale ends, or a swale discharges
to Waters of the State.
Pipe End
A Pipe End is placed at the end of a pipe where that pipe joins with a swale or Waters of the
State. Pipe Ends may have an "end treatment" such as a flared end section, rip rap, poured
concrete, etc.
Morehead City Storm Drainage System Mapping
Appendix A ameO
page A-2
DRAFT
Hidden Junction Box
A Hidden Junction Box is used where two or more storm drainage pipes appear to connect but
you cannot determine the exact location of the structure. This may be due to the structure being
buried, paved over or inaccessible.
Other -See Comments
The structure type Other -See Comments is used when you cannot classify the storm drainage
structure into one of the other structure classifications. An entry in one of the comments fields
is made that describes the structure. These structures are usually combinations of the structures
listed above. An example of this would be a Curb Inlet — Grate, located in curb and gutter, with
an opening in the back of the structure like an Open Throat Catch Basin. Other examples would
include such combinations as a Curb Cut on the top of a Headwall or a Curb Cut with a Grate.
The total amount of Storm Drainage Structures collected is 5,314. The number of each
Structure type collected is shown below.
Storm Drainage Structure
Number Collected
Bridge End
2
Other -See Comments
6
Manhole/ Junction Box
22
Curb Inlet — No Grate
25
Control Structure
35
Open Throat Catch Basin
37
Curb Cut
99
Hidden Junction Box
119
Curb inlet — Grate
169
Grate
208
Headwall
211
Conve ance End
729
Pi a End
3,652
Morehead City Storm Drainage System Mapping page Ad
AppendizA ameO
DRAFT
Computerized Database for Storm Drainage System Conveyances
The Storm Drainage System Conveyances were split up into eight different categories listed
below.
➢ Bridge
➢ Box Culvert
➢ Dry Pond
➢ Hidden Drain
➢ Creek
➢ Wet Pond
➢ Swale
➢ Storm Drain
Each is Described Below
Bridge
Bridges are used where a significant bridge crosses a swale or stream. It is used primarily for
display purposes so that when the coverages are viewed in ArcView with the associated aerial
photographs as a backdrop, water does not appear to flow `over the bridge".
Box Culvert
A Box Culvert describes a storm drainage pipe that is rectangular in shape. These structures are
usually extremely large and there measurements are recorded in feet instead of inches unless
otherwise indicated in the database.
Dry Pond
Dry Ponds are man-made storm drainage features that retain storm drainage during rainfall
events and allow the stormwater to evaporate or infiltrate into the ground.
Hidden Drain
A Hidden Drain is used to connect two storm drainage structures together where access to the
pipe is not possible. Situations where this occurs are; both pipe ends buried by sediment, both
pipe ends under water, for connection between Hidden Junction Boxes, no access to each pipe
end (i.e. inside a locked fence). Investigative procedures such as transmission of noise through
the pipes, tracking of storm drainage flow, best judgment, etc. are used to establish connectivity
using Hidden Drains.
Morehead City Storm Drainage System Mapping
Appendix A am
page A -a
.rrc�l�
Creek
Creeks indicate Waters of the State, very large swales or indicate a water flow path through
inaccessible areas such as swamps.
Wet Pond
Wet Ponds indicate a man-made storm drainage feature that retains a permanent pool of water
and slowly releases accumulated stormwater to the storm drainage system over a long period of
time.
Swale
A Swale indicates a man-made or natural open channel conveyance that is not classified as
Waters of the State. A Swale may be lined with rip rap, concrete, stone, masonry, gabions, etc.
or may have a natural lining of bare earth, rock or vegetation.
Storm Drain
The attribute Storm Drain describes any man-made conveyance that usually conveys stormwater
below the surface of the ground. Storm Drains can be made out of metal, concrete, masonry and
plastic.
The total amount of Storm Drainage Conveyances collected is 5017. The number of each
Conveyance type collected is shown below.
Storm Drainage
Conveyance
Number Collected
Bride
1
Box Culvert
3
Dry Pond
5
Hidden Drain
38
Creek
65
Wet Pond
86
Swale
2,408
Storm Drain
2,411
Morehead City Storm Drainage System Mapping page AS
Appendix A am
DRAFT
Computerized Database for Non-Stormwater Discharges
The Non-Stormwater Discharges were split up into thirteen different categories listed below.
➢ Household HAZMAT
➢ New Construction
➢ Car Washing
➢ Industry Wastewater
➢ Sanitary Sewer
➢ Sediment/ Erosion
➢ Dumping
➢ Solid Waste
➢ Maintenance Activities
➢ Petroleum, Oils and Lubricants (POL)
➢ Laundry Wastewater
➢ Unknown Liquid
➢ Other See Comments
Each is Described Below
Household HAZMAT
Household HAZMAT is used to describe items of hazardous materials typically generated by a
residential household -and are dumped into the storm drainage system. These items included;
batteries, bleach, insecticides, small quantities of waste and used POLs, household cleaners,
paint, etc.
New Construction
New Construction concerns the general waste items that may be generated by construction
activities that are dumped into the storm drainage system. These items include; POLs, batteries,
cleaners, paint, light and heavy metals, erosion and sediment transport, construction debris,
scrap wood, trash, etc.
Car Washing
Car Washing refers to possibly contaminated discharges from commercial car washes that enter
the storm drainage system.
Industry Wastewater
Industry Wastewater concerns any discharge from a facility classified as an industrial that
reaches the storm drainage system untreated.
Morehead City Storm Drainage System Mapping page A-6
Append& A ameO
DRAFT
Sanitary Sewer
Sanitary Sewer concerns untreated raw sewage being discharged to the storm drainage system.
Sediment/ Erosion
One of the main concerns with Sediment in the storm drainage system is the clogging of storm
drainage pipes and sediment transport that can fill swales and negatively affect aquatic life.
Erosion can cause severe damage to storm drainage structures as well as damage swale and
creek banks.
Dumping
Dumping concerns the deliberate depositing of one or more waste materials directly into or
around the storm drainage system. This usually involves large quantities of material. Dumping
can involve liquids, solids, gasses or any combination of these. Dumping is usually used to
describe large quantities of trash, urban debris, construction materials, HAZMAT, etc. usually
placed in or adjacent to a swale or creek.
Solid Wastes
Solid Wastes concerns the dumping of wastes that normally would have been accepted at a
sanitary landfill. It closely resembles Dumping but the wastes involved are usually only.solid in
form. This is used to describe specific waste depositing such as tires, wood, white goods, etc.
Maintenance Activities
Maintenance Activities usually involves improper waste disposal by a specific maintenance
activity. An example of this would be allowing oil to discharge directly into the storm drainage
system during an oil change. Another example would be the dumping of old equipment
batteries into or adjacent to the storm drainage system. Maintenance activities are very similar
to any of the other categories but can be tied to a specific maintenance activity.
Petroleum, Oils and Lubricants (POL)
Petroleum, Oils and Lubricants (POL) concern the discharge of POLs into the storm drainage
system. This can be deliberate or accidental. An example of deliberate would be dumping used
oil into a storm drain inlet. An example of accidental would be a railroad derailment where a
tank car loaded with POLs discharges its contents into the storm drainage system.
Morehead City Storm Drainage System hrapping page A-7
AppendirA ' ame
DRAFT
Laundry Wastewater
Laundry Wastewater concerns a direct connection of household or commercial laundry
equipment to the storm drainage system. This is usually found in areas that have septic tanks.
Homeowners will run a laundry discharge line directly to the storm drainage system.
Other -See Comments
Other -See Comments concerns discharges or dumping of unknown substances to the storm
drainage system that were not easily classifiable into one of the other non-stormwater discharge
classifications or needed additional investigation to confirm the suspected non-stormwater
discharge.
Unknown Liquid
Unknown Liquid concerns a liquid substance being discharged to the storm drainage system that
was not easily classifiable into one of the other non-stormwater discharge classifications or
needed additional investigation to confirm the suspected non-stormwater discharge.
The total amount of Non-Stormwater Discharges collected is 125. The number of each Non-
Stormwater Discharge type collected is shown below.
Non-Stormwater
Discharge
Number Collected
Household HAZMAT
1
New Construction
1
Car Washing
2
Industry Wastewater
3
Sanitary Sewer
4
Sediment/ Erosion
6
Dumping
7
Solid Waste
7
Maintenance Activities
11
Petroleum, Oils and
Lubricants POL
12
Laundry Wastewater
13
Other -See Comments
16
Unknown Liquid
42
Morehead City Storm Drainage System Mapping page A-8
Appendix A amecs
DRAFT
Computerized Database for Best Management Practices
The Storm Drainage System Best Management Practices were split up into the two major
categories listed below.
➢ Structural
➢ Non -Structural
Each of these categories was split up into five different sub -categories that are listed below.
➢ Wastewater
➢ Hazardous Waste
➢ Hazardous Material
➢ Management
➢ Other - See Comments
Each is Described Below
Structural
The Structural category is used to describe Best Management Practices (BMPs) that apply to
storm drainage structures or Conveyances. Examples of Structural BMPs are repairing and/or
upgrading existing storm drainage structures and conveyances, removing sanitary sewer direct
connections to the storm drainage system, removing other Non-Storinwater connections,
installing stormwater quality controls such as vegetative buffers, installing storrwater quantity
controls such as retention/ detention ponds, etc.
Non -Structural
The Non -Structural category applies to those BMPs that do not involve the storm drainage
structures and conveyances directly but contribute to the quality and quantity of stormwater
discharges. Examples of Non -Structural BMPs are public education, stormwater ordinances,
procedural changes, stormwater design manuals, existing ordinance revisions, master planning,
etc.
Wastewater
Wastewater is a general term used to describe liquid byproducts generated during industrial
activities. Wastewater can include sewage, product rinse water, electroplating solutions, fabric
dye, paint, POLs, hazardous chemicals, etc. Wastewater usually requires some form of
treatment before being allowed to discharge to the storm drainage system.
Alorehead City Storm Drainage System ♦Mapping
Appendix A am
page A4
WNIFffl—
Hazardous Waste
Hazardous Waste refers to material handling practices and procedures for materials that become
hazardous after there intended uses. Hazardous waste may also have been Hazardous Material
before being used. Examples of Hazardous Waste include spent radioactive fuel rods, PCBs,
poisons, certain forms of POL products (including waste .oil and contaminated fuel), acids,
bases, etc.
Hazardous Material
Hazardous Material refers to material handling practices and procedures for material that is
hazardous in nature before its intended use. Examples of hazardous material include acids,
bases, radioactive materials, poisons, etc.
Management
Management refers to suggested procedural changes, public education, stormwater and other
ordinances, etc.
Other - See Comments
Other - See Comments refers to those BMPs that do not fall into one of the above categories.
These may include maintenance issues.
The total amount of Best Management Practices collected was 11.
The number of each Best Management Practice major category type collected is shown below.
Non-Stormwater Number Collected
Discharge
Structural 4
Non -Structural 7
The number of each Best Management Practice sub -category type collected is shown below.
Non-Stormwater
Discharge
Number Collected
Wastewater
1
Hazardous Waste
1
Management
2
Hazardous Material
3
Other - See Comments
1 4
Morehead City Storm Drainage System Mapping p�,p) page A-10
Appendix A amet+
J,
DRAFT STORMWATER MANAGEMENT ORDINANCE FOR
MOREHEAD CITY, NORTH CAROLINA
Whereas, the Town of Morehead City is concerned about protecting property from flood
damage in developed areas of the Town, and seeks to minimize and, if possible, prevent
such flooding, and
Whereas, the Town of Morehead City wants to protect surface and ground waters from
negative stormwater runoff impacts, and
Whereas, the Town of Morehead City recognizes that water quality is essential to the
quality of life of its residents and property owners, and is essential to the vitality of its
tourism industry, and seeks to preserve water quality in the Atlantic Ocean and Bogue
Sound,
Now, therefore, be it ordained by the Morehead City Town Council that the following
Stormwater Management Ordinance be adopted:
Sec. 1 Goals and Purposes
The preservation of water quality and protection against flooding are important
environmental goals of the Town of Morehead City. In order to meet these goals, the
Town of Morehead City adopts this Stormwater Management Ordinance for the following
purposes:
a) To regulate new development, redevelopment, and other construction activities
within the jurisdiction of the Town, consistent with federal, state and local requirements,
and the Town's environmental goals.
b) To provide the structure within which the authority of the Town of Morehead City to
administer and enforce stormwater quantity and quality regulations will be exercised.
Sec. 2. Findings of facts.
Development without control of drainage has a significant adverse impact upon the
health, safety and welfare of the'community. More specifically:
a) Uncontrolled stormwater runoff can carry pollutants into receiving water bodies,
degrade water quality and result in adverse impacts to shelifishing waters;
b) Uncontrolled stormwater runoff can increase nutrients such as phosphorus and
nitrogen, thereby accelerating eutrophication of receiving waters, adversely
affecting flora and fauna;
c) Improperly channeling water increases the velocity of runoff, thereby increasing
erosion and sedimentation;
Draft SWM Ordinance 1
Town of Morehead City
d) Construction requiring the alteration of natural topography and removal of
vegetation tends to cause a loss of natural recharge areas and increase erosion;
e) Siltation of water bodies resulting from increased erosion decreases their
capacity to hold and to transport water, interferes with navigation, and harms
flora and fauna;
f) Impervious surfaces increase the volume and rate of stormwater runoff and allow
less water to percolate into the soil, thereby decreasing groundwater recharge;
g) Improperly managed stormwater runoff can increase the incidence of flooding
and the level of floods which do occur, endangering property and human life;
h) The economy of the Town of Morehead City, as well as the health and welfare of
its citizens, is dependent upon the preservation of local beaches, clean navigable
waterways and marinas, abundant fishing and shellfishing resources, and a
healthy ecosystem that attracts visitors to the Town.
Many future problems can be avoided or substantially mitigated if land is
developed in accordance with sound stormwater runoff management practices.
Sec. 3. Objectives.
In order to protect, maintain, and enhance both the immediate and the long-term health,
safety and general welfare of the citizens of the town, this ordinance has the following
objectives:
a) Minimize the transport of pollutants to area surface waters;
b) Protect and maintain natural salinity levels in estuarine areas;
c) Minimize erosion and sedimentation;
d) Prevent damage to wetlands;
e) Prevent damage from flooding, while recognizing that natural fluctuations in
water levels are beneficial;
f) Protect, restore, and maintain the habitat of fish and wildlife;
g) Ensure the attainment of these objectives by requiring the approval and
implementation of stormwater management plans for all activities that may have
a significant adverse impact upon community waters and nearby properties.
Sec.4. Definitions.
Unless specifically defined below, words or phrases shall be interpreted so as to give
them the meaning they have in common usage and to give this ordinance its most
effective application:
Draft SWM Ordinance
Town of Morehead City
Adverse impact means any modification, alteration or effect on a feature or characteristic
of community waters or wetlands, including their quality, quantity, hydrodynamics,
surface area, species composition, living resources, aesthetics or usefulness for human
or natural uses which is or may potentially be harmful or injurious to human health,
welfare, safety or property, to biological productivity, diversity, or stability or which
unreasonably interferes with the enjoyment of life or property, including outdoor
recreation. The term includes secondary and cumulative as well as direct impacts.
Clearing means the removal of trees and brush from the land but shall not include the
ordinary mowing of grass.
Detention means the collection and storage of surface water for subsequent gradual
discharge.
Developer means any person who engages in development either as the owner or as
the agent of an owner of property.
Development or development activity means:
(1) The construction, installation, alteration, demolition or removal of a structure,
impervious surface, or drainage facility;
(2) Clearing, scraping, grubbing, or otherwise removing or killing the vegetation
of a site;
(3) Adding, removing, exposing, excavating, leveling, grading, digging,
burrowing, dumping, piling, dredging, or significantly disturbing the soil, mud,
sand or rock of a site in any other manner.
Drainage facility means any component of the drainage system
Drainage system means the system through which water flows from the land. It includes
all watercourses, water bodies and wetlands.
Erosion means the wearing or washing away of soil by the action of wind or water.
Existing conditions means the current conditions that exist at the site as a result of prior
development of the site, including, but not limited to, any structures, impervious
surfaces, drainage facilities, and other disturbances of the site. In cases in which no
prior development of the site has occurred, the existing conditions are the
predevelopment conditions, as defined in this section.
Flood means a temporary rise in the level of any water body, watercourse or wetland
which results in the inundation of areas not ordinarily covered by water.
Impervious surface means a surface which has been compacted or covered with a layer
of material that prevents or significantly impedes the infiltration of water into the soil. It
includes semi -impervious surfaces such as gravel and compacted clay, as well as most
conventionally surfaced streets, roofs, sidewalks, parking lots and other similar
structures, alterations, or improvements.
Draft SWM Ordinance 3
Town of Morehead City
Natural systems means systems which predominantly consist of or use those
communities of plants, animals, bacteria and other flora and fauna which occur
indigenously on the land, in the soil or in the water.
Owner means the person in whom is vested the fee ownership, dominion, or title of
property, i.e., the proprietor. This term may also include a tenant, if chargeable under his
lease or occupancy agreement for the maintenance of the property, and any designated
agent of the owner or tenant including a developer acting on an owners behalf.
Person means any and all persons, natural or artificial and includes any individual, firm,
corporation, government agency, business trust, estate, trust, partnership, association,
limited liability company, two (2) or more persons having a legally recognized joint or
common interest, or other legal entity.
Peedevelopment conditions means those conditions which existed before alteration,
resulting from human activity, of the natural topography, vegetation and rate, volume or
direction of surface or ground water flow, as indicated by the best available historical
data.
Receiving bodies of water means any water bodies, watercourses or wetlands into which
surface waters flow either naturally, in manmade ditches, or in a closed conduit system.
Redevelopment means the acquisition, clearance, rehabilitation, or rebuilding of an area
for residential, recreational, commercial, industrial, or other purposes, including the
provision of streets, utilities, parks, recreational areas, or other open spaces.
Retention means the collection and storage of runoff without subsequent discharge to
surface waters.
Sediment means fine particulate material, whether mineral or organic, that is in
suspension or has settled in a water body.
Sedimentation facility means any structure or area that is designed to hold runoff water
until suspended sediments have settled.
Site means any tract, lot or parcel of land or combination of tracts, lots, or parcels of land
which are in one (1) ownership, or are contiguous and in diverse ownership where
development is to be performed as part of a unit, subdivision, or project.
Structure means that which is built or constructed, an edifice or building of any kind, or
any piece of work artificially built up or composed of parts joined together in some
definite manner, but shall not include fences or signs.
Subdivide means to divide the ownership of a parcel of land, whether improved or
unimproved, into two (2) or more contiguous lots or parcels of land, whether by
reference to a plat, by metes and bounds or otherwise, or, if the establishment of a new
street, easement, or right-of-way is involved, any division of a parcel of land.
Vegetation means all plant growth, especially, but not limited to, trees, shrubs, vines,
ferns, mosses and grasses.
Draft SWM Ordnance 4
'Town of Morehead City
Waters or community of waters means any and all water on or beneath the surface of
the ground. It includes the water in any watercourse, water body or drainage system. It
also includes diffused surface water and water percolating, standing or flowing beneath
the surface of the ground, as well as coastal waters.
Water body means any natural or artificial pond, lake, reservoir or other area which
ordinarily or intermittently contains water and which has a discernible shoreline.
Watercourse means any natural or artificial stream, river, creek, channel, ditch, canal,
conduit, culvert, drain, waterway, gully, ravine, street, roadway, swale, or wash in which
water flows in a definite direction, either continuously or intermittently, and which has a
definite channel, bed or banks.
Watershed means a drainage area or drainage basin contributing to the flow of water
into a receiving body of water.
Wetlands means those areas that are inundated or saturated by surface or ground water
at a frequency and duration sufficient to support, and under normal circumstances do
support, a prevalence of vegetation typically adapted for life in saturated soil conditions.
Wetlands generally include swamps, marshes, bogs and similar areas. The following
three (3) conditions are necessary to define a wetland area:
(1) Over fifty (50) percent of the dominant vegetation must be plants which are
typically adapted for life in saturated soil conditions (hydrophytes); and
(2) The soil is saturated long enough during the growing season to develop
anaerobic (without oxygen) conditions that favor the growth of hydrophytes
(hydric soil); and
(3) There is a presence of wetland hydrology (the water table is no lower than
twelve (12) inches or there is a presence of hydrologic indicators which show that
water saturates the plant root system over long periods during the growing
season).
Sec.5. Applicability.
All development and redevelopment, including, but not limited to, all single-family and
duplex residential dwellings and all commercial development, constructed within the
town after the effective date of this ordinance must comply with the minimum stormwater
control standards outlined in Section 6.
Sec. 6. Storm Water Management Standards
(a) Performance standards. The proposed development, development activity, or
redevelopment shall be planned, designed, constructed, and maintained to meet each of
the following standards:
(1) Ensure that, after development or redevelopment, runoff from the site
approximates the rate of flow, volume and timing of runoff that would have
Draft SWM Ordnance
Town of Morehead City
occurred following the same rainfall under existing conditions and, to the extent
practicable, the predevelopment conditions, unless runoff is discharged into an
off -site drainage facility as provided in section 6(c)
(2) Maintain the natural hydrodynamic characteristics of the watershed;
(3) Protect and, to the extent feasible, restore the quality of surface waters;
(4) Ensure that erosion- during and after development or redevelopment is
minimized;
(5) Protect the beneficial functioning of wetlands as areas for the natural storage
of surface waters and the chemical reduction and assimilation of pollutants;
(6) Prevent increased flooding and damage that may result from improper
location, construction, and design of structures in areas which are presently
subject to danger from flooding;
(7) Otherwise further the objectives of this ordinance.
(b) Design standards. To ensure attainment of the objectives of this ordinance and to
ensure that performance standards will be met, the design, construction and
maintenance of drainage systems shall be consistent with the following standards:
(1) Channeling runoff directly into water bodies shall be strictly prohibited.
Instead, runoff shall be routed through swales and other systems designed to
increase time of concentration, decrease velocity, increase infiltration, allow
suspended solids to settle, and remove pollutants.
(2) The area of land disturbed by development shall be as small as practicable.
Those areas, which are not to be disturbed, shall be protected by an adequate
barrier from construction activity. Whenever possible, indigenous vegetation shall
be retained and protected. Where this is not possible, suitable nature species
shall be planted.
(3) No grading, cutting or filling shall be commenced until erosion and
sedimentation control devices have been installed between the disturbed area
and water bodies, watercourses and wetlands.
Clean sand shall be used for fill. The fines in the sand should be limited so that
seepage and migration through it will facilitate normal drainage. The fill shall be
placed so as not to interfere with the natural and normal flow of surface water nor
in any way cause water to be diverted to adjacent property.
Pipe culverts shall be installed under driveways to allow passage of water, if
consistent with good design practices.
(4) Land which has been cleared for development and upon which construction
has not commenced shall be protected from erosion by appropriate techniques
designed to revegetate the area within thirty (30) days (seeding, etc.).
Draft SWM Ordinance
Town of Morehead City
(5) Sediment shall be retained on the site of the development
(6) Wetlands and other waterbodies shall not be used as sediment traps during
development.
(7) Erosion and sedimentation facilities shall be maintained to insure that they
continue to function properly.
(8) Artificial watercourses shall be designed, considering soil type, so that the
velocity of flow is low enough to prevent, or minimize to the maximum extent
practicable, erosion.
(9) Vegetated buffer strips shall be created or, where practicable, retained in their
natural state along the banks of all watercourses, water bodies or wetlands. The
width of the buffer shall be sufficient to prevent erosion, trap the sediment in
overland runoff, provide access to the water body and allow for periodic flooding
without damage to structures.
(10) Intermittent watercourses, such as swales, will be vegetated.
(11) Retention and detention ponds shall be used to retain and detain the
increased and accelerated runoff which the development generates. Water shall
be released from detention ponds into watercourses or wetlands at a rate and in
a manner approximating the natural flow, which would have occurred before
development.
(12) Although the use of wetlands for storing and purifying water is encouraged,
care must be taken not to overload their capacity, thereby harming the wetlands
and transitional vegetation. Wetlands should not be damaged by the construction
of detention ponds.
(13) All development must provide appropriate infiltration to control runoff of the
first two (2) inches of rainfall from all impervious surfaces on site. The design of
the infiltration method must take into account the runoff from any pervious
surface drainage that is directed to the infiltration site. Flow from gutters and
downspouts shall be diverted, as necessary, (i.e., dry wells, porous drainpipes in
rock envelopes, natural vegetation, etc.) All storage of runoff shall be
accomplished so that there is a minimum of two (2) feet vertical separation
between the highest seasonal water table and the bottom of the pipe or trench or
dry well used for storage.
(14) Runoff from parking lots shall be treated to remove oil and sediment before it
enters receiving waters.
(15) Stormwater shall not be discharged to the sound or a beach, except within
NC Division of Water Quality, or any successor agency, guidelines.
(16) Development within the area of environmental concern (AEC) adjacent to
outstanding resource waters (ORW), as defined by the NC Division of Coastal
Management, shall adhere to the stormwater management standards of the NC
Division of Coastal Management, or any successor agency. The standards of
Draft SWM Ordinance
'� Town of Morehead City
the NC Division of Coastal Management shall take precedence over the
standards included in this ordinance, provided, however, that the developer shall
also be required to adhere to the specific standards included in this ordinance
that are not in conflict with the standards of the NC Division of Coastal
Management.
(c) Off -site drainage facilities.
(1) The town may allow stormwater runoff that is associated with subdivisions
that have an approved subdivision stormwater management plan in accordance
with Section 7 (d), or that is otherwise of unacceptable quality or which would be
discharged in volumes or at rates in excess of those otherwise allowed by this
ordinance, to be discharged into drainage facilities off the site of development if
each of the following conditions are met:
(A) It is not practicable to completely manage runoff on the site in a
manner that meets the performance standards and design standards, or if
the initial subdivision stormwater management plan was designed to
accommodate the runoff from the site;
(B) The off -site drainage facilities and channels leading to them are
designed, constructed and maintained in accordance with the
requirements of this chapter;
(C) Adverse environmental impacts on the site of development will be
minimized.
(2) A request to use off -site drainage facilities and all information related to the
proposed off -site facilities should be made a part of the developer's stormwater
management plan.
(3) The use of off -site drainage facilities shall be permitted only if easements or
deed restrictions to insure continued use of the site for a drainage facility have
been approved by the Town and recorded in the office of the Carteret County
register of deeds. A copy of such recorded provisions shall be provided to the
Town and shall be considered a condition of any approval granted under this
ordinance.
Sec. 7. Stormwater management plan.
(a) All development and redevelopment, including, but not limited to, single-family or
duplex residential dwellings, constructed within the town after the effective date
of this ordinance must submit a storm water management plan that complies with
the minimum stormwater control standards outlined in Section 6. The burden of
proving compliance with the stormwater management standards and the cost
associated with producing such proof shall be borne by the developer.
(1) Exemptions. The following development activities are exempt from the
stormwater management plan requirement:
Draft SWM Ordinance
Town of Morehead City
(A) Additions or modifications to existing single family detached
residential structures, if the development does not increase impervious
surface by more than 1,000 square feet.
(B) Any maintenance, alteration, use or improvement to an existing
structure not changing or affecting quality, rate, volume or location of
surface water discharge.
(b) Submittal and approval. A stormwater management plan must be submitted and
approved before:
(1) A preliminary plat is approved;
(2) An existing drainage system is altered, rerouted, or deepened;
(3) A building permit is issued;
(c) A professionally designed stormwater management plan, designed and sealed
by a registered design professional, shall be required for all proposed
development, including, but not limited to, single-family and duplex residential
dwellings, with 5,000 square feet or more of impervious surface. Proposed
residential projects with less than 5,000 square feet of impervious surface shall
also be required to submit a stormwater management plan, however, it need not
be designed nor sealed by a registered design professional, provided that, in the
judgment of the planning department, the proposed storm water management
system will meet the standards outlined in Section 6.
REQUIREMENTS FOR STORMWATER MANAGEMENT PLANS FOR
RESIDENTIAL PROJECTS WITH LESS THAN 5,000 SQUARE FEET OF
IMPERVIOUS SURFACE.
1) It is the responsibility of an applicant to include in the stormwater
management plan sufficient information for the town or its agents to
evaluate the environmental characteristics of the affected areas, the
potential and predicted impacts of the proposed activity on area surface
waters, and the effectiveness and acceptability of those measures
proposed by the applicant for reducing adverse impacts. The stormwater
management plan shall contain maps, charts, graphs, tables,
photographs, narrative descriptions and explanations and citations to
supporting references, as appropriate, to communicate the information
required by this section.
2) The stormwater management plan shall contain the name, address and
telephone number of the owner and the developer. In addition, the legal
description of the property shall be provided, and its location with
reference to such landmarks as major water bodies, adjoining roads, or
subdivisions shall be clearly identified by a map.
3) The conditions of the site shall be described in detail, including the
following:
Draft SWM Ordinance
Town of Morehead City
(A) The direction of flow of stormwater runoff under existing conditions;
(B) A survey of the site, including topography. The survey shall be
prepared by a licensed surveyor showing contours every two (2) feet. It
must also show the cross section, and location of drainage ditches within
the area surveyed, and the location of wetlands, and ponds. Elevation of
the seasonal high water level in the ponds and wetlands shall also be
shown.
(C) At the discretion of the planning department, the elevation of the
seasonal high water table may be required.
4) Proposed alterations of the site shall be described in detail, including:
(A) Changes in topography. The proposed final elevations shall be shown
in a manner that can be distinguished from the existing elevations. If
there are abrupt changes in elevations, these should be clearly identified
in the plans. These should be plotted on a scale that is easy to read and
in a form that conveys the nature of changes that are proposed, including
plans for single family and duplex residential structures;
(B) Areas where vegetation will be cleared or otherwise killed.
(C) Areas that will be covered with an impervious surface and a
description of the surfacing material.
(D) The size and location of any buildings or other structures.
5) All components of the drainage system and any measures for the
detention, retention, or infiltration of water or for the protection of water
quality shall be described in detail, including:
(A) The quantity of stormwater (based on a 2" rainfall design) that will be
collected on the site;
(B) Areas of the site to be used or reserved for percolation;
(C) A plan for the control of erosion and sedimentation which describes in
detail the type and location of control measures, the stage of
development at which they will be put into place or used, and provisions
for their maintenance.
(D) Any other information which the developer or the town or its
designated agents believes is reasonably necessary for an evaluation of
the development proposal for compliance with this ordinance.
REQUIREMENTS FOR STORMWATER MANAGEMENT PLANS FOR
RESIDENTIAL PROJECTS WITH MORE THAN 5,000 SQUARE FEET OF
IMPERVIOUS SURFACE AND FOR ALL COMMERCIAL PROJECTS
Draft SWM Ordinance 10
Town of Morehead City
1) Stormwater management plans must be completed by a North Carolina
registered professional with qualifications appropriate for the type of
system required; these registered professionals are defined as:
professional engineers; landscape architects, to the extent that the NC
General Statutes, Chapter 89A, allow; and registered land surveyors, to
the extent that the design represents incidental drainage within a
subdivision, as provided in General Statute 89c-3(7).
2) It is the responsibility of an applicant to include in the stormwater
management plan sufficient information for the town or its agents to
evaluate the environmental characteristics of the affected areas, the
potential and predicted impacts of the proposed activity on area surface
waters, and the effectiveness and acceptability of those measures
proposed by the applicant for reducing adverse impacts. The stormwater
management plan shall contain maps, charts, graphs, tables,
photographs, narrative descriptions and explanations and citations to
supporting references, as appropriate, to communicate the information
required by this section.
3) The stormwater management plan shall contain the name, address and
telephone number of the owner and the developer. In addition, the legal
description of the property shall be provided, and its location with
reference to such landmarks as major water bodies, adjoining roads, or
subdivisions shall be clearly identified by a map.
4) The existing environmental and hydrologic conditions of the site and of
receiving waters and wetlands shall be described in detail, including the
following:
(A) The direction, flow rate, and volume of stormwater runoff under
existing conditions;
(B) A description of all watercourses, water bodies and wetlands on or
adjacent to the site or into which stormwater flows. Information regarding
their water quality and the current water quality classification, if any, given
them by the state Department of Environment and Natural Resources
(DENR) shall be included;
(C) Groundwater levels, including seasonal fluctuations.
(D) Location of floodplains;
(E) Vegetation;
(F) A survey of the site, including topography. The survey shall be
prepared by a licensed surveyor showing contours every two (2) feet. It
must also show a visual survey of a strip of at least ten (10) feet wide,
outside and all around its perimeter. It must also show the cross section,
and location of drainage ditches within the area surveyed, the location of
live trees in the disturbed area with a circumference greater than 24" at a
height of 36", and the location of wetlands, and ponds. The survey shall
Draft SWM Ordinance 11
Town of Morehead City
indicate the elevation of the seasonal high water table. Elevation of the
seasonal high water level in the ponds and wetlands shall also be shown.
(G) Soils, as delineated and described in the Soil Conservation Service
Publications, Soil Survey of Carteret County, NC or Soil Survey of the NC
Outer Banks.
5) Proposed alterations of the site shall be described in detail, including:
(A) Changes in topography. The proposed final elevations shall be
shown on a grid not larger than twenty five (25) feet by twenty five (25)
feet in a manner that can be distinguished from the existing elevations. If
there are abrupt changes in elevations, these should be clearly identified
in the plans. These should be plotted on a scale that is easy to read and
in a form that conveys the nature of changes that are proposed.
(B) Areas where vegetation will be cleared or otherwise killed.
(C) Areas that will be covered with an impervious surface and a
description of the surfacing material.
(D) The size and location of any buildings or other structures.
6) Predicted impacts of the proposed development on existing conditions
shall be described in detail, including:
(A) Changes in the incidence and duration of flooding on the site and
adjoining property;
(B) Impacts on wetlands, if any;
(C) Impacts on vegetation
(D) Certification by the owner / developer that all stormwater
management construction and maintenance will be done according to
plan.
(E) An as -built certification signature block to be executed after
completion, to be signed by the owner and the qualified stormwater
design professional .
7) All components of the drainage system and any measures for the
detention, retention, or infiltration of water or for the protection of water
quality shall be described in detail, including:
(A) The quantity of stormwater, based on a 2" rainfall design, that will be
collected on the site;
(B) Detention and retention areas, including plans for the discharge of
contained waters;
Draft SWM Ordinance 12
Town of Morehead City
(C) Areas of the site to be used or reserved for percolation;
(D) A plan for the control of erosion and sedimentation which describes
in detail the type and location of control measures, the stage of
development at which they will be put into place or used, and provisions
for their maintenance.
(E) Any other information which the developer or the town or its
designated agents believes is reasonably necessary for an evaluation of
the development proposal for compliance with this ordinance.
(d) New subdivisions. The stormwater management plan for new subdivisions,
regardless of proposed land use, shall include calculations of, and incorporate
design features to control the total volume of storm water runoff projected after
full build -out of the subdivision.
(1) The catchment area shall be the entire development and any adjoining areas
that drain into the development site.
(2) If the projected impervious surface at full build -out of the subdivision is
greater than 5,000 sq. ft., or if the subdivision is for commercial use, the
stormwater management plan must be completed by a North Carolina registered
professional with qualifications appropriate for the type of system required.
Stormwater management plans for new subdivisions shall adhere to the
requirements outlined in Section 7 (c).
(3) The development of a subdivision stormwater management plan in
accordance with this subsection may relieve individual lot owners of the
requirement to provide the required on -site infiltration required in Section 6 (b)
(13). As individual lots within a subdivision are developed, a stormwater
management plan shall be required for each lot, in accordance with Section 16-7
(a). The stormwater management plan for individual lots may refer to the original
subdivision stormwater management plan to meet the requirements of this
ordinance, however, the building inspector may require additional on -site
retention if runoff from the proposed development is not adequately controlled
through the original subdivision stormwater management plan.
Sec. 8. Procedures and fees.
(a) Any person planning a development, as defined in this ordinance, unless
exempted, shall submit a stormwater management plan to the town.
(b) A permit fee will be collected at the time the stormwater management plan is
submitted and will reflect the cost of administration and management of the
permitting process. The town shall establish a fee schedule based upon the
relative complexity of the project. The fee schedule may be amended, from time
to time, by the Town Council.
(c) The stormwater management plan shall not be approved unless it clearly
indicates that the proposed development will meet the performance standards
Draft SWM Ordinance 13
Town of Morehead City
and the design standards described in section 16-6, except where a variance has
been granted pursuant to section 16-11;
(d) Within thirty (30) days after submission of the completed stormwater management
plan, the town shall approve, with or without specified conditions or modifications,
or reject the plan and shall notify the applicant accordingly. If the town has not
rendered a decision within thirty (30) days after plan submission, it shall inform
the applicant of the status of the review process and the anticipated completion
date. If the plan is rejected or modified, the town shall state its reasons. While it is
not customary for the town or its designated agents to actually design an
acceptable project for the applicant, it will do all it can to work with the applicant to
achieve an acceptable project plan in harmony with this chapter. Projects
requiring formal planning board and town board review shall not be subject to the
30 day requirement. Approval of stormwater management plans for these
projects shall be determined in conjunction with the planning board's and town
board's formal review process.
(a) Inspections. No stormwater management plan may be approved without
adequate provision for inspection of the property before development activity
commences. The applicant shall arrange with the town's building inspector or his
designated agent for scheduling the following inspections:
(1) Initial inspection. Prior to approval of the stormwater management plan;
(2) Bury inspection. Prior to the burial of any underground drainage structure;
(3) Erosion control inspection. As necessary to ensure effective control of
erosion and sedimentation;
(4) Finish inspection. When all work including installation of all drainage facilities
has been completed.
The town building inspector or his designated agent shall inspect the work and
shall either approve it or notify the applicant in writing in what respects there has
been a failure to comply with the requirements of the approved stormwater
management plan. Any portion of the work that does not comply shall be
promptly corrected by the applicant or the applicant will be subject to the penalty
provisions of section 16-12.
(f) Appeals. Any person aggrieved by the action of any official charged with the
enforcement of this chapter, as the result of the disapproval of a properly filed
application for a permit, issuance of a written notice of violation, or an alleged
failure to properly enforce the chapter in regard to a specific application shall
have the right to appeal the action to the town board of adjustment. The appeal
must be filed in writing within twenty (20) days of the mailing date of the official
transmittal of the final decision or determination to the applicant, and it must
state clearly the grounds on which the appeal is based, and shall be processed in
the manner prescribed for hearing administrative appeals under local and state
statutes.
Draft SWM Ordinance 14
Town of Morehead City
Sec. 9. Manual of stormwater management practices.
The town adopts by reference the following published manual of stormwater
management practices for the guidance of persons preparing stormwater management
plans, and designing or operating drainage systems:
NCDENR Stormwater Best Management Practices (April, 1999) as published by
the NC Department of Environment and Natural Resources, Division of Water
Quality, Water Quality Section, 512 N. Salisbury Street, Raleigh, NC 27699.
This manual may be updated periodically to reflect the most current and effective
practices and shall be made available to the public at the town hall during normal
business hours.
Sec.10. Maintenance.
(a) Drainage facilities shall be dedicated to the town where they are determined by
the Town Council to be appropriately a part of the town's maintained system.
(b) Any private drainage systems designed to serve subdivisions, multi -family
residential developments, and commercial structures shall have adequate
recorded easements to permit the town to inspect and, if necessary, to take
corrective action should the owner fail to properly maintain the system. A copy of
such recorded provisions shall be provided to the Town and shall be considered
a condition of any approval granted under this ordinance. Before taking
corrective action, the town shall give the owner written notice of the nature of the
existing defects. If the owner fails within thirty (30) days from the date of notice to
commence corrective action, and thereafter to proceed with due diligence to
make all necessary corrections, and fails to appeal the matter, the town may take
necessary corrective action. If the town takes necessary corrective action, the
cost shall become a lien on the real property until paid, or if the property is under
common ownership, such as an owners' association, the cost shall be assessed
equitably among all property owners in the subdivision, multi -family residential
development, and / or commercial structure .
(c) The owner of the property on which work has been done pursuant to this
ordinance for private stormwater management facilities, or any other person or
agent in control of such property, shall maintain in good condition and promptly
repair and restore all grade surfaces, drains, structures, and other protective
devices. This includes regular removal of dead trees, leaves, debris that
accumulate in ponds. Such repairs or restoration and maintenance shall be in
accordance with approved plans.
Sec. 11 Variances
The town may grant a written variance from any requirement of this ordinance using the
following criteria:
Draft SWM Ordinance 15
Town of Morehead City
a) There are special circumstances applicable to the subject property of its
intended use. A written request for variance shall be provided and shall state
specific variances sought and reasons for their granting.
b) A variance from the terms of this ordinance shall not be granted by the town
unless, and until, it shall make a finding:
a. That special conditions and circumstances exist which are peculiar
to the land, structure, or building involved and which are not applicable to
other lands, structures, or buildings in the same district;
b. That literal interpretation of the provisions would deprive the
applicant of rights commonly enjoyed by other properties in the same
district under terms of this ordinance;
C. That the special conditions and circumstances do not result from
the actions of the applicant;
d. That the hardship is of a physical nature and not economic
e. That granting the variance requested will not confer on the applicant
any special privilege that is denied by this ordinance to other land,
structures, or buildings in the same district.
c) Additionally, the granting of the variance will not:
a. Significantly increase or decrease the rate or volume of surface water
runoff;
b. Have a significant adverse impact on a wetland, watercourse or water
body;
c. Significantly contribute to the degradation of water quality;
d. Otherwise significantly impair attainment of the objectives of this
ordinance.
d) In granting any variance, the town may prescribe appropriate conditions and
safeguards in conformity with this ordinance.
Sec.12. Enforcement.
(a) Public Health Nuisance. Any development activity that is commenced without
prior approval of a stormwater management plan or is conducted contrary to an
approved stormwater management plan as required by this chapter may be
deemed a public health nuisance and may be restrained by injunction or
otherwise abated in a manner provided by law. (G.S. 160A-175, 160A-193)
(b) Civil penalties. In addition to, or as an alternative to, any penalty provided
herein or by law, any person who violates the provisions of this ordinance is
subject to a civil penalty. The civil penalty shall be not less than one hundred
dollars ($100.00) nor more than one thousand dollars ($1,000.00) Such person
shall be guilty of a separate offense for each day during which the violation
occurs or continues. If the violator does not pay a civil penalty assessed by the
Town within 30 days after it is due, the Town may institute a civil action to
recover the amount of the penalty assessed in the superior court of Carteret
County. An assessed penalty that is not contested is due when the violator is
Draft SWM Ordinance 16
Town of Morehead City
served with a notice of violation. An assessment that is contested is due at the
conclusion of the administrative and/or judicial review of the assessment (NCGS
160A-175).
(c) Abatement and restoration of land. Any violator may be required to restore the
land disturbed by the violator to its undisturbed condition. In such cases, the
Town shall bring an action for mandatory and/or prohibitory injunction and order
of abatement. Should the violator fail to restore the land in accordance with the
Court's order of abatement, the Town may execute the order of abatement and
levy a lien upon the property restored. (160A-175).
(d) Notice of violation. When the town building inspector determines that
development activity is not being carried out in accordance with the requirements
of this chapter, he / she shall issue a stop work order and a written notice of
Violation to the owner of the property. The notice of violation shall contain:
(1) The name and address of the owner or developer
(2) The street address when available or a description of the building structure,
or land upon which the violation is occurring;
(3) A statement specifying the nature of the violation;
(4) A description of the remedial actions necessary to bring the development
activity into compliance with this ordinance and a time schedule for completion of
such remedial action;
(5) A statement of the penalty or penalties that shall or may be assessed against
the person to whom the notice of violation is directed;
(6) A statement that the town's determination of violation may be appealed by
filing a written notice of appeal with the Town's building inspector within fifteen
(15) days of service of notice of violation.
The notice of violation shall be served upon the person to whom it is directed in
any of, or any combination of, the following methods:
(a) By personal service upon the violator;
(b) By mailing a copy of the notice of violation by certified mail, postage
prepaid, return receipt requested to such person at his / her last known
address. Notice shall be deemed to be received if no return is received
within 10 days of the date of such mailing.
(c) By posting a notice in a visible location upon the property where a
violation is or was occurring. Notice of the violation shall be deemed to
be received by the violator immediately upon such posting.
No action, inaction, or election of remedy shall be construed as a waiver of the
Town's right to enforce any part of this ordinance by any and all remedies
provided herein.
Draft SWM Ordinance 17
Town of Morehead City
NOTE: State law reference(s)--Conservation of Natural Resources, N. C. Constitution,
Article XIV, Section 5; General police power, G.S. 160A-174; Municipal regulation of
land -disturbing activity, G.S. 113A-50 et seq., G.S. 143-214.7.
This ordinance shall become effective immediately upon its adoption. If any section,
sentence, clause, or phrase of this ordinance is for any reason held to be invalid or
unconstitutional by the decision of any court of competent jurisdiction, such decision
shall not affect the validity of the remaining portions of this ordinance,
Adopted this day of 2002.
Town of Morehead City
Draft SWM Ordinance 18
Town of Morehead City