HomeMy WebLinkAboutCity of Port Orchard SWMP 2025ORCHARD.
2025 Stormwater
Management
Program Plan
Prepared in Accordance with the
Western Washington Phase II
2024-2029 NPDES Municipal
Permit
City of Port Orchard
216 Prospect Street
Port Orchard, WA 98366
PERMIT #WAR045536
City of Port Orchard Stormwater Management Program — 2025
Contents
I.
Introduction......................................................................................................................2
II.
Stormwater Planning.........................................................................................................4
III.
Public Education and Outreach.........................................................................................5
IV.
Public Involvement and Participation.................................................................................8
V.
MS4 Mapping & Documentation........................................................................................9
VI.
Illicit Discharge Detection and Elimination(IDDE)............................................................10
VII.
Controlling Runoff from New Development, Redevelopment, and Construction Sites .......12
VIII.
Stormwater Management for Existing Development.........................................................14
IX.
Source Control Program For Existing Development..........................................................15
X.
Operations and Maintenance..........................................................................................17
XI.
Total Maximum Daily Load(TMDL)...................................................................................20
XII.
Monitoring......................................................................................................................21
XIII.
Conclusion....................................................................................................................21
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City of Port Orchard Stormwater Management Program — 2025
I. Introduction
Purpose The Stormwater Management Program Plan for the City of Port Orchard outlines a
comprehensive approach to meet current and future stormwater and surface water
management regulations. Building on the City's Stormwater and Watersheds Comprehensive Plan,
the SWMP focuses on fulfilling specific regulatory requirements while guiding city policies on public
safety, stormwater, water quality, climate change, and natural resource management.
The City of Port Orchard's Stormwater Management Program Plan is a living document outlined in the
City's Phase II Municipal NPDES Permit. The City remains fully committed to complying with the
Permit's requirements. However, due to limited resources, the City prioritizes program elements with
the most pressing deadlines to maintain compliance and implement the Stormwater Management
Program Plan.
Background The federal Clean Water Act (CWA) of 1972 established water quality goals for the
surface waters of the United States. In 1987, Congress amended the CWA to
address stormwater. One of the mechanisms for achieving the goals of the act is the National
Pollutant Discharge Elimination System (NPDES) permit program, which is administered by the
Environmental Protection Agency (EPA). The EPA has delegated responsibilities and administration
of the NPDES permit program to many states, including the State of Washington via the Department
of Ecology (Ecology).
For municipalities, the CWA established a two-phase permit program. Phase I covered large and
medium-sized municipalities and counties, construction sites > 5 acres, and major industrial
sources. Later, Phase II was enacted to cover smaller jurisdictions. Ecology also manages permit
programs for construction sites > 1 acre and certain other types of industrial runoff. In 2000, the
Environmental Protection Agency finalized the NPDES Phase II rules regulating "small" Municipal
Separate Stormwater Sewer Systems (MS4s). The Phase II jurisdictions, such as Port Orchard, are
those with populations less than 100,000 located within, or partially within, an urbanized area and
that operates a Municipal Separate Storm Sewer System (MS4) that discharges to waters of
Washington State.
The 1990 Phase I regulation requires medium and large cities or certain counties with populations of
100,000 or more to obtain NPDES permit coverage for stormwater discharges. The 1999 Phase II
regulation requires small MS4s in U.S. Census Bureau -defined urbanized areas, as well as MS4s
designated by the permitting authority, to obtain NPDES permit coverage for their stormwater
discharges.
In Washington, the Phase I permit was issued in 1995 to the cities of Seattle and Tacoma, plus King,
Pierce, Snohomish, and Clark (in 1999) counties. On August 1, 2012, the Department of Ecology
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City of Port Orchard Stormwater Management Program — 2025
issued a new Phase I permit and two new Phase II permits, one each for Western and Eastern
Washington.
The current Phase II Western Washington Phase II Municipal Stormwater Permit (WWAPHII) became
effective on August 1, 2024. Implementation of the program requirements is phased over the 5-year
term of the permit. The reporting requirements of the permit cover activities within a calendar year
from January 1 to December 31.
The Permit process intends to set jurisdictional standards for municipalities to reduce the impacts
from both point source and non -point source pollution carried by stormwater to waters of the state.
The Permit is also intended to promote public education and awareness regarding the proper
management and reporting of pollutant -generating activities.
Program Administration The Permit outlines stormwater program activities and implementation
milestones that permittees must follow to comply with the Federal
Clean Water Act. Permittees must:
• Develop a SWMP Plan that includes all the required activities in the permit and is designed to
reduce the discharge of pollutants to the maximum extent possible.
• Implement those activities within the required timeframes of the permit term; and
• Submit annual reports to the Department of Ecology by March 31 st of each year to document
progress toward complete program implementation in the previous calendar year. The City
will post the Stormwater Management Program (SWMP) Plan on its website annually for
public viewing and comments and submit it to Ecology. Each SWMP Plan will update the
previous year's activities and preview the next year's. The City must fully develop and
implement the SWMP Plan for the upcoming year by March 31, 2025. For 2025, the City will
continue tracking costs, training, inspections, enforcement actions, public education, and
coordination with other jurisdictions.
Responsibilities and Coordination The Public Works Department of the City of Port Orchard
oversees permit compliance and implementation within the
city's jurisdiction and watersheds. Each year, Public Works coordinates with relevant city
departments through the Stormwater Permit Coordination Group and Stormwater Planning Program
to ensure ongoing and planned activities meet permit requirements. Port Orchard also commits to
supporting and seeking support from regional partners and neighboring jurisdictions when
opportunities arise. The City currently cooperates with several groups, including the West Sound
Stormwater Outreach Group, the West Sound Stormwater Manager's Group, the Stormwater Work
Group, and the West Sound Partners for Ecosystem Recovery. The City also corresponds with local
builders' associations and interested third parties regarding stormwater code revisions.
SWMP Elements The Permit regulates how municipalities discharge stormwater into the
waters of the state. The waters of the state include rivers, lakes, streams,
wetlands, and Puget Sound. Discharge of these waters is only allowed if regulatory municipal
programs are implemented to reduce pollution -generating activities that impact stormwater within
the following disciplines:
• S5.C.1 —Stormwater Planning
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City of Port Orchard Stormwater Management Program — 2025
• S5.C.2 —
Public Education and Outreach
• S5.C.3 —
Public Involvement and Participation
• S5.C.4 —
MS4 Mapping and Documentation
• S5.C.5 —
Illicit Discharge Detection and Elimination
• S5.C.6—Controlling Runoff from New Development, Redevelopment, and Construction Sites
• S5.C.7 — Stormwater Management for Existing Development
• S5.C.8 — Source Control Program for Existing Development
• S5.C.9—Operations and Maintenance
• S7— Monitoring
• S8— Total Maximum Daily Load (TMDL)
II. Stormwater Planning
P1 ANNIN
Permit Requirement S5. C.1
s
The City's Stormwater Planning Program develops policies and strategies to manage water quality
and protect local waterways. This program informs and guides the development of water quality
management tools that protect receiving waters. As part of this initiative, the City created the City of
Port Orchard Stormwater and Watersheds Comprehensive Plan, which provides a framework for the
City's planning, policies, maintenance, capital improvements, watershed management, and asset
management efforts.
The Stormwater Planning Program will meet the minimum performance standards required by the
2024-2029 Western Washington Phase II Municipal Permit. This includes:
✓ Convening an interdisciplinary team
✓ Coordinating with long-range plan updates
✓ Implementing low -impact development code -related updates and revisions
✓ Adopt and implement tree canopy goals and policies to support stormwater management
✓ Completing a Stormwater Management Action Plan (SMAP) for at least one new high -priority
catchment area or additional actions for the existing SMAP
S5.C.1.a — Interdisciplinary Team The City of Port Orchard has assembled an interdisciplinary
team to direct its stormwater planning efforts. The team
comprises the Public Works Director, Development Director, Assistant City Engineer, Finance
Director, Operations Manager, Utility Manager, and Stormwater Coordinator, with consultant support
as needed. The Utility Advisory Committee and City Council will be regularly updated on the progress
of the Stormwater Planning Program.
S5.C.1.b — Long-range plan updates In 2024, the City Council adopted the City's first
Stormwater and Watersheds Comprehensive Plan. The
plan outlines specific solutions to ensure long-term protection of the environment and community
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City of Port Orchard Stormwater Management Program — 2025
by improving the City's stormwater system. Throughout 2025, with help from the interdisciplinary
team, the City will continue to implement the long-range plans identified in the Comprehensive Plan.
S5.C.1.c — Low Impact Development (LID) Code The City requires all development to adhere to
low -impact development (LID) principles and
requirements, with the intent of making LID the preferred and commonly used approach to site
development. The Port Orchard Municipal Code, design guidelines, rules, and standards have been
designed to minimize impervious surfaces, native vegetation loss, and stormwater runoff in all types
of development, where feasible. In 2025, the City plans to review these regulations to identify ways
to enhance the LID requirements further. Annually, the City will assess and document any newly
identified regulatory or administrative barriers to the implementation of LID principles and best
management practices (BMPs).
S5.C.1.c.iii —Tree Canopy Goals and Policies To support stormwater management, the City is
committed to developing long-term tree canopy
goals. In 2025, the Citywill acquire NearMap, a geospatial data tool, to guide the development of the
most appropriate tree -canopy goals. These goals will aim to improve water quality in receiving
waters. The City will pay special attention to maintaining existing mature canopy, with an emphasis
on maintaining or increasing canopy in overburdened communities.
S5.C.1.d — Stormwater Management Action Plan (SMAP) In 2022, the City completed the
Stormwater Management Action Plan
(SMAP) with support from Herrera Environmental Consultants. The following year, the City
incorporated the SMAP into its 2023 Port Orchard Stormwater and Watersheds Comprehensive Plan,
which the City Council then adopted. To fulfill current requirements to update the existing SMAP or
create a new SMAP for at least one new high -priority catchment area, the City has budgeted to
procure a consultant. In 2025, the interdisciplinary team, with direction from the City Engineer, Public
Works Director, Community Development Director, and the Mayor, will convene to determine the
direction of the SMAP based on the City's short and long-term goals.
III. Public Education and Outreach
Permit Requirement S5.C2
The City's education and outreach program educates the public on methods to mitigate stormwater
runoff impacts. The program targets diverse audiences through a comprehensive campaign,
including homeowners, business owners, developers, and families.
Minimum performance measures include:
✓ Build general awareness about methods to address and reduce impacts from stormwater
runoff.
✓ Effect behavior change to reduce or eliminate behaviors and practices that cause or
contribute to adverse stormwater impacts.
City of Port Orchard Stormwater Management Program — 2025
✓ Create stewardship opportunities that encourage community engagement in addressing the
impacts of stormwater runoff.
S5.C.2.a.i — General Awareness The City of Port Orchard collaborates with partners across the
Kitsap area to not only reach more people with consistent
messaging but also to share expertise, expenses, staff time, and experiences. The City will continue
to collaborate and partner with:
• Puget Sound Starts Here (PSSH)
• West Sound Stormwater Outreach Group (WSSOG)
• Kitsap County Public Health District
• Stormwater Action Monitoring (SAM)
• Kitsap Conservation District
• West Sound Partners for Ecosystem Recovery (WSPER)
In 2025, the City plans to expand its collaboration and partnership with other local groups and
entities to reach a more expansive audience.
The City is participating in and promoting these events in 2025:
• Sinclair Inlet Clean-up: Spring and Fall
• Arbor Day: Friday, April 25, 2025
• Earth Day: Tuesday, April 22, 2025
• Port Orchard Farmers Market: Spring and Summer
• Puget Sound Starts Here—Stormwater Awareness Month: TBD
• Annual City of Port Orchard Spring Clean-up: April 2025
The City also uses existing resources to promote consistent messaging at:
• City of Port Orchard's Website
• Pet Waste Stations
• Suds -Free Car Wash Kit
• Public flyers and information posted at City Hall and available handouts
• Posted flyers at the Port Orchard Library
• Public -facing digital signage in City Hall and Public Works lobby
• City of Port Orchard Facebook page: new to 2025 — monthly educational postings about
stormwater management
In addition, the Utilities Compliance Program (UCP) is integral in the continuous education of local
businesses and private Stormwater facility owners. The City designed flyers internally to inform
business owners of the importance of protecting the City's storm system. These flyers will be
distributed throughout 2025 to businesses during the Utilities Compliance Specialist (UCS) annual
site visits. In 2025, the City will develop additional flyers educating the public about the risk of PCB -
containing materials in certain buildings.
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City of Port Orchard Stormwater Management Program — 2025
; C.
Sinclair Inlet Clean-up 2024
S5.C.2..a.ii — Behavior Change The City will maintain its partnership with WSSOG to develop
and implement a community -based social marketing
campaign aimed at driving behavior change. Following a comprehensive evaluation of the previous
Natural Yard Care Behavior Change Campaign, the group collectively decided to revise the campaign
to target a new priority audience and promote BMPs that align with the local community's priorities
and challenges.
The City's new behavior change campaign, in partnership with WSSOG, will focus on several key
objectives: keeping dumpster lids shut to prevent rain from entering dumpsters, ensuring trash
remains contained within dumpsters, and collaborating with garbage service providers to maintain
dumpsters in good working condition. The priority audience for this campaign has been identified as
commercial businesses. In partnership with WSSOG, the City is activelydeveloping a comprehensive
strategy and implementation schedule for the Dumpster Campaign, with plans to launch the
initiative by September 1, 2025.
S5.C.2..a.iii — Stewardship The City of Port Orchard actively promotes environmental
stewardship by organizing and hosting an array of annual cleanup
and educational activities within its jurisdiction. Through its
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City of Port Orchard Stormwater Management Program — 2025
partnership with the WSSOG, the City continues to provide public outreach opportunities that
educate residents about stormwater management and its environmental impacts. Additionally, the
City collaborates with Kitsap County to facilitate benthic macroinvertebrate sampling with local
volunteers, coordinates Sinclair Inlet cleanup events, and hosts educational pop-up events at the
Port Orchard Farmers Market. These community -engaged initiatives are widely advertised on the
City's website, Facebook page, and City Hall information hub.
IV. Public Involvement and Participation
Permit Requirement S5.C.3
The City actively solicits and values public input in the Stormwater Management Program and Plan.
The community benefits from the program elements, and the City gains valuable insights from the
community's input to help address their goals and priorities, all while ensuring compliance with
permit requirements.
Permit requirements:
✓ Provide opportunities for the public, including overburdened communities, to participate in
the development, implementation, and periodic updates of the Stormwater Management
Action Plan (SMAP) and the Stormwater Management Plan (SWMP).
✓ Make the SWMP, SMAP, and Annual Report available to the public, including posting on the
City's website.
S5.C.3 — Creating Opportunities and availability of the SWMP, SMAP, and Annual Report
The City creates opportunities for public engagement, including overburdened communities in the
following ways:
1. Public hearings are held for proposed stormwater utility rate structure revisions.
2. Multiple opportunities for public comments at Planning Commission and City Council
meetings are available during the approval process for the City's Comprehensive Land
Use Plan (which includes a stormwater component). Public comments can also be
submitted through the City's website.
3. Citizens are invited to City Council meetings, Utility Advisory meetings, and Public
Hearings about NPDES Phase II topics.
4. The Annual Report, SWMP, SMAP, and Comprehensive Plans are posted on the City's
website and undergo public comment via hearing, public meeting, or SEPA process if
significant changes or additions are proposed.
5. Online, the public can review the annual report, SWMP, SMAP, and Comprehensive
plans at https://portorchardwa.gov/stormwater-management/. Each year, the city will
make the updated versions of these documents available by March 31 st
City of Port Orchard Stormwater Management Program — 2025
The City will continue its current public involvement and participation strategies by soliciting public
comments on stormwater issues on the City website and continuing to expand ways to reach
overburdened communities by participating in WSSOG and collaborating with local builders'
associations to help them stay informed of stormwater issues and regulatory requirements.
V. MS4 Mapping & Documentation
Permit Requirement S5.C.4
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The City utilizes the Geographic Information System (GIS) to map the city's Stormwater system. This
information is also being integrated into a newly acquired asset management system, Cartegraph.
These tools allow the City to not only track existing infrastructure but also to plan for the future. The
MS4 Map currently provides data on:
• Known MS4 outfalls and known MS4 discharge points, including size and material where
known.
• Receiving waters other than groundwater.
• Stormwater treatment and flow control BMPs owned and operated by the City of Port
Orchard.
• Geographic areas served by the City that do not discharge stormwater to surface
waters. Tributary conveyances to all known outfalls and discharge points with a 24-inch
nominal diameter or larger, including type, material, size if known, and associated
drainage areas.
• Connections between the MS4 owned or operated by the City and other municipalities.
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City of Port Orchard Stormwater Management Program — 2025
• All connections to the MS4 authorized by the City after February 16, 2007.
• Size and Material for all known MS4 outfalls.
• All known connections from the MS4 to privately owned stormwater systems.
The City maintains and updates its features inventory database annually while screening and
performing routine maintenance activities. The City has already transitioned to an electronic
mapping format (GIS) for its features inventory and will continue characterizing all known outfalls
during inspections and investigations. In 2025, the City will continue to integrate this data into the
Cartegraph system, allowing staff to prioritize workflow, manage and track stormwater infrastructure
and inspection schedules, and monitor maintenance and improvements to the stormwater system.
The City will also increase the utilization of CCTV cameras to map unknown connections and other
Stormwater features. As new information becomes available through routine business operations,
the City will promptly update both the GIS and Cartegraph systems. This comprehensive mapping
data is available upon request to the Department of Ecology, federally recognized Indian Tribes,
municipalities, and other permittees.
S5.C.4.b — New Mapping In 2025, the Citywill procure the software NearMap, an additional tool
to aid in implementing a methodology that will intentionally identify
and map tree canopies for stormwater management purposes. This is in response to new
requirements in the NPDES Phase II permit for 2024 — 2029. The NearMap tool will also help the City
map overburdened communities in relation to stormwater treatment and facilities, outfalls,
discharge points, and tree canopy on City -owned properties.
VI. Illicit Discharge Detection and Elimination (IDDE)
Permit Requirement S5.C.5
The City is dedicated to the prevention of water pollution to protect water quality for humans,
animals, and the environment. To support this goal, the City's Illicit Discharge Detection and
Elimination program aims to prevent, detect, trace, and eliminate spills, illicit discharges, and illicit
connections into the MS4, stopping pollutants from reaching receiving waters.
The NPDES Phase II Municipal permit lays out these requirements:
✓ Procedures for conducting investigations of the stormwater system, includingfield screening
and methods for identifying potential sources.
✓ Inform public employees, businesses, and the public of hazards associated with illegal
discharges and improper disposal of waste and publicize a hotline phone number for the
public to report spills, dumping, and illicit discharges.
✓ Implement an ordinance to effectively prohibit non-stormwater discharges.
✓ Implement an ongoing program designed to detect and identify non-stormwater discharges
and illicit connections to the MS4.
✓ Provide trainingfor municipalfield staff, who during normaljob duties may come into contact
with or observe illicit discharges and/or connections, on the identification and reporting of
illicit discharges and/or connections in the stormwater system.
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City of Port Orchard Stormwater Management Program — 2025
S5.C.5.a — Reporting Procedures for IDDE The City's illicit discharge detection and elimination
program is guided bythe Illicit Connection
and Illicit Discharge Field Screening and Source Tracing Guidance Manual (Herrera Environmental
Consultants, Inc.) The City is utilizing the Department of Ecology's WQWebIDDE reporting tool to
track IDDE responses and investigations, and any corrective or enforcement actions.
S5.C.5.b— Informing the Public I
To prevent illicit discharges and improper waste disposal, the
City proactively informs the public, businesses, and
employees about these hazards. The City distributes educational brochures and articles, both
physically and digitally, to raise IDDE awareness. Additionally, the City maintains an active spill
hotline (360-337-5777) and online portal (SeeClickFix) advertised through Kitsap 1. The public is
encouraged to call 911 for emergencies and after-hours time -sensitive situations. Through
comprehensive codes, policies, training programs, and community outreach, the city works to
engage the entire community in IDDE prevention efforts.
S5.C.5.c —Ordinance Implementation The City codified the IDDE ordinance in 2009 and reviews
the ordinance annually to update it according to new
requirements. Ordinances for the City's illicit discharge prevention, detection and elimination are
always available online at:
https://www.codepubLishing.com/WA/PortOrchard/#!/html/PortOrchard15/PortOrchard1530.html
S5.C.5.d — Implement IDDE Program The City's Operations and Maintenance team conducts
the annual MS4 field screening, including outfall
inspections during the dryweather season and routine annual catch basin inspections and cleaning.
Additionally, the UCS conducts continuous MS4 field screening during business source control
inspections. The City will track and record all field screening activities in its Cartegraph asset
management system, to complete screening on at least 12% of the municipal separate storm sewer
system (MS4). The O&M team and the UCS utilize the methodologies recommended in the Herrera
Environmental Consultants guide: Illicit Connection and Illicit Discharge Field Screening and Source
Tracing Guidance Manual.
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City of Port Orchard Stormwater Management Program - 2025
S5.C.5.d.iii -Training on IDDE The city provides formal annual training (as well as
informal training throughout the year) for all public works
staff on identifying and reporting illicit discharges and connections as well as spill response. The
annual training utilizes the Herrera 2020 IC/IDDE Guidance manual and includes a general IDDE
refresher course for all public works employees. The training program is reviewed and updated
annually to ensure city staff remain informed and prepared to address illicit discharges.
VII. Controlling Runoff from New Development,
Redevelopment, and Construction Sites
Permit Requirement S5.C.6
The City is responsible for managing stormwater runoff entering its MS4s from new development,
redevelopment, and construction sites. To reduce pollutants in stormwater runoff from entering the
MS4, the City has established an inspection program for development in the public and private
sectors, including transportation projects. The inspection program meets these minimum
performance measures outlined in the WWPHII Municipal Permit:
✓ Implement enforcement mechanisms and ordinances that address runoff from new
development, redevelopment, and construction site projects.
✓ Program for site plan review, inspection and enforcement.
✓ Make available a link to the online Construction and Industrial Stormwater General Permit
Notice of Intent (NOI) form, and a linkto the online registration requirementsfor Underground
Injection Control (UIC) wells to representatives of proposed new development and
redevelopment. Enforce local ordinances controlling runoff from sites that are also covered
by stormwater permits issued by Ecology.
✓ Train staff whose primary duties are implementing this program.
S5.C.6.a,b - Enforcement To ensure proper stormwater management, the City of Port Orchard
adopted the criteria specified in the 2019 Washington State
Department of Ecology Stormwater Management Manual for Western Washington (SWMMWW,
2019). This policy, outlined in the Port Orchard Municipal Code 20.150 (established in 2017), applies
to all public and private development and redevelopment projects.
In 2025, the City will adopt the new 2024 edition of the SWMMWW and update the municipal code
accordingly. The Port Orchard Municipal Code currently meets permit requirements and follows the
minimum standards, thresholds, and definitions outlined in Appendix 1.
S5.C.6.c - Program for Site plan review, Inspection, and Enforcement The City has an
established permitting
process for plan review, inspection, and enforcement to ensure effective stormwater management.
This includes reviewing and approving all stormwater plans, inspecting sites with high potential for
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City of Port Orchard Stormwater Management Program — 2025
sediment runoff per the WWPHII Municipal Permit, monitoring the construction process to evaluate
erosion and sediment controls, and verifying maintenance activities on new residential stormwater
BMPs every 6 months until project completion. Upon final approval, the City inspects permitted sites
to confirm proper installation and maintenance of stormwater facilities. When enforcement is
necessary based on inspections, the City follows the progressive enforcement policy outlined in Port
Orchard Municipal Code 20.150.270. The City also maintains thorough records of all inspection,
enforcement, and maintenance activities, regularly evaluating and revising record -keeping
procedures to uphold permit compliance.
S5.C.6.d — Notices of Intent and UIC Well registration The City's Permit Center makes the
Notice of Intent for Construction
Activity", "Notice of Intent for Industrial Activity", and UIC Well registration links available to all
developers. It also informs applicants of the permit requirement through pre -application letters and
the stormwater section of the Development Guidelines. Additionally, the City provides access to the
Department of Ecology's Construction Stormwater General Permit, Industrial Stormwater General
Permit, and associated NOI documentation for applicable developments.
S5.C.6.e—Training Inspection staff are Certified Erosion and Sediment Control Lead
trained, with construction inspection training, low -impact
development techniques knowledge, and stormwater design standards expertise. Additional internal
and external training occurs as needed, including drone operator certification for inspection drones.
IR
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City of Port Orchard Stormwater Management Program — 2025
VIII. Stormwater Management for Existing Development
Permit Requirement S5.C.8
The City has developed a comprehensive and strategic
stormwater management program designed to reduce and
control stormwater discharges to the state's waters from
areas of existing development. The city aims to implement
targeted stormwater investments that focus on long-term
sustainability, ensuring that improvements are not only
effective in the short term but also adaptable to future needs. By prioritizing projects that address
both current and future challenges, the city plans to mitigate the impacts of stormwater runoff
through thoughtful planning, improved infrastructure, and green solutions. The minimum
performance measures are:
✓ Implement stormwater facility retrofits or tailored SWMP actions that meet the equivalent of
2.6 acres according to Appendix 12 and provide a list of planned, individual projects
scheduled for funding or implementation each year.
✓ By March 31, 2028, fully fund, start construction, or completely implement project(s) that
meet the equivalent 2.6 acres.
S5.C.7.a,b Implement Stormwater Facility Retrofits During the previous permit cycle, the City
hired Herrerra Environmental
Consultants to identify strategic stormwater investments for the City's Stormwater Management
Action Plan (SMAP). This plan outlined several key retrofit projects to help protect and enhance
ecosystem functions in the South Blackjack Creek Catchment.
The three projects identified were:
1. The South Sound Regional Facility (renamed the Sherman Avenue Stormwater Park)
2. The Flower Meadows Street Pond Retrofit and Naturalization
3. The Sedgwick Water Campus Pond Naturalization
The City has already begun work on the Sherman Avenue Stormwater Park, with project planning,
public outreach, and the formation of a committee scheduled for the fourth quarter of 2024. In the
first quarter of 2025, an interdisciplinary team will assess the feasibility and timeline for pursuing the
other two identified projects.
S5.C.7.c Fully fund, start construction, or completely implement project The City is committed
to ensuring the
Sherman Avenue Stormwater Park is fullyfunded, begins construction, or is fully implemented bythe
deadline of March 31, 2028. To achieve this, a detailed, phased approach will be followed, focusing
on funding, design, approvals, and community engagement, with the ultimate goal of completingthe
project on time. Through careful planning, community involvement, and strategic partnerships, the
City is confident that the park will be a valuable addition to the community while also improving
stormwater management in the area.
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City of Port Orchard Stormwater Management Program — 2025
IX. Source Control Program For Existing Development
Permit Requirement S5.C.8
The City is deeply committed to protecting its natural water resources and ensuring the health and
safety of its community through its comprehensive Source Control Program. This initiative focuses
on preventing pollutants from entering the city's MS4 by implementing strict controls on waste
management, industrial discharges, and stormwater runoff. The program includes regular
inspections, outreach and education for local businesses, and the enforcement of ordinances
designed to minimize contamination at the source. By working collaboratively with residents,
businesses, and environmental organizations, the City strives to protect the waters of the state from
contaminated stormwater in the City while supporting sustainable practices and promoting
environmental stewardship. Minimum performance measures include:
✓ Make effective an ordinance or other enforceable document requiring the application of
source control BMPs associated with existing land uses and activities.
✓ Inventory sites that have the potential to generate pollutants to the MS4 and update every 5
years.
✓ Implement an inspection program for all identified sites within the City's jurisdiction.
✓ Implement a progressive Enforcement Policy.
✓ Train all staff who are responsible for implementing the Source Control Program.
S5.C.8.b.i Ordinance To address pollutant -generating sources from existing land uses and
activities, as outlined in the NPDES municipal permit's Appendix 8. The
City has an ordinance enforcing the use of source control BMPs. The City annually reviews this source
control ordinance, making any necessary changes or improvements to ensure an effective program
and enforcement mechanism.
S5.C.8.b.ii Inventory The City will be improving its comprehensive inventory procedures of all
businesses within its city limits. This will include identifying businesses
and sites that engage in pollutant -generating activities, as well as other pollutant sources identified
through complaint responses, such as home -based and multi -family properties. Due to growth, the
City intends to inventory businesses continuously each year, utilizing strategies such as windshield
monitoring and reviewing business license applications.
S5.C.8.b.iii Inspection Program The UCS is responsible for educating and informing each site
identified about pollution prevention, good housekeeping, the
activities that may generate pollutants, and the source control requirements. The UCS will complete
annual required inspections equal to 20% more of the identified sites plus 100% of complaint -
generated inspections. Sites are prioritized based on the highest potential for pollution generation.
The UCS is a multi -disciplinary position responsible for source control, cross -connection control and
Fats, Oils, and Grease (FOG) monitoring. The list of business inspections and enforcement activities
will be reported annually.
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City of Port Orchard Stormwater Management Program — 2025
S5.C.8.b.iv Progressive Enforcement Port Orchard's Municipal Code 15.30.140 outlines a
progressive enforcement policy for stormwater
compliance. This policy requires sites to implement the required BMPs within a reasonable
timeframe. If a site fails to comply, the City will take escalating enforcement actions, such as sending
reminders via letters or phone calls, conducting inspections, and potentially pursuing enforcement
through municipal codes or the judicial system.
To demonstrate the efforts made to bring sites into compliance, the City maintains detailed records
of site visits, inspection reports, warning letters, and violations. The enforcement policy is reviewed
annually to evaluate its effectiveness, with changes made as needed.
S5.C.8.b.v Training The City provides ongoing staff training to those who are responsible for
implementing the source control program, covering key topics such as legal
authority, best management practices (BMPs) and their proper application, inspection procedures,
Lessons learned, typical cases, and enforcement procedures. This training is thoroughly
documented, tracked, and updated as needed to reflect changes in policies and procedures.
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City of Port Orchard Stormwater Management Program — 2025
X. Operations and Maintenance
Permit Requirement S5.C.9
To comply with operations and maintenance permit requirements, the City's Operations and
Maintenance Department implements several measures to minimize pollutants in stormwater runoff
from municipal activities. These measures align with Endangered Species Act guidelines, NPDES
permit regulations, and best management practices.
The City implements and documents the Operations and Maintenance program to regulate
maintenance activities to reduce stormwater impacts. The minimum performance measures
include:
✓ Maintenance Standards
✓ Maintenance of stormwater facilities regulated by the City
✓ Maintenance of stormwater facilities owned and operated by the City
✓ Practices, policies, and procedures to reduce stormwater impacts
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City of Port Orchard Stormwater Management Program - 2025
✓ Develop and implement a street -sweeping program
✓ Ongoing training program for employees
S5.C.9.a - Maintenance Standards The City has adopted the Stormwater Management Manual
for Western Washington (SWMMWW, 2019) standards,
which it uses to regulate maintenance activities. Specifically, the City uses these maintenance
standards to determine when maintenance is required. If an inspection identifies that a maintenance
standard has been exceeded, the City will perform the necessary maintenance and document the
actions taken within the following timeframes:
• Typical maintenance of facilities, except catch basins, will be completed within 1 year.
• Maintenance of catch basins will be completed within 6 months.
• Maintenance requiring capital construction of less than $25,000 will be completed within 2
years.
S5.C.9.b - Maintenance of stormwater facilities regulated by the City
The UCS annually inspects private stormwater facilities that discharge into the (MS4) and were
permitted bythe City after 2007. The goal is to inspect 100% of these facilities. The UCS works closely
with facility owners to educate them on the maintenance standards and best practices outlined in
the facilities' maintenance manuals. If private facilities fail to meet the maintenance standards, the
Specialistfirst provides education butwill escalate to progressive enforcement if necessary. The UCS
documents all inspections and enforcement actions.
S5.C.9.c - Maintenance of stormwater facilities owned by the City
The Operations and Maintenance staff conduct annual inspections of at least half of all known public
catch basins, as well as inspect and clean all TMDL catch basins. Following major storm events, the
staff also performs spot checks to identify any potential damage to the City's stormwater system.
When deficiencies or maintenance issues are detected during inspections, the staff promptly
addresses them by establishing maintenance timelines per the 2024 SWMMWW. In 2025, the City
will utilize its new asset management system, Cartegraph, to streamline stormwater management
processes. This system will improve the documentation of all maintenance and repairs, leading to
more efficient recordkeeping and work order management while also supporting the City's goal of
completing at least 95% of required inspections.
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City of Port Orchard Stormwater Management Program — 2025
S5.C.9.d Practices, policies, and procedures to reduce stormwater impacts
The City will continuously review and update the adopted maintenance standards as outlined in the
Stormwater Management Manual for Western Washington as well as current inspection,
maintenance, and record -keeping practices. The goal is to improve the efficiency, accuracy, and
timeliness of the stormwater program. In 2025, the City will utilize an asset management database
to facilitate the scheduling and tracking of maintenance processes and to accurately document the
condition of the City's stormwater infrastructure. Additionally, the City will evaluate its owned lands
for potential stormwater pollution sources and establish mitigation practices. These City -owned
Lands typically include, but are not limited to: streets, parking lots, roads, highways, buildings, parks,
open spaces, road rights -of -way, maintenance yards, and stormwater treatment/flow control
BMPs/facilities.
The following activities have been addressed:
• Pipe cleaning
• Cleaning of culverts that convey stormwater in ditch systems
• Ditch maintenance
• Street cleaning
• Road repair and resurfacing, including pavement grinding
• Snow and ice control
• Utility installation
• Pavement striping maintenance
• Maintaining roadside areas, including vegetation management
• Dust control
• Application of fertilizers, pesticides, and herbicides according to the instructions
for their use, including reducing nutrients and pesticides using alternatives that
minimize environmental impacts
• Sediment and erosion control
• Landscape maintenance and vegetation disposal
• Trash and pet waste management
• Building exterior cleaning and maintenance: for City -owned buildings built or renovated
between 1950 - 1980, procedures and practices will be updated to include source control
BMPs to minimize Polychlorinated Biphenyls (PCBs) from entering the MS4.
S5.C.9.e Street Sweeping The Citywill start planning and developing a street sweeping program
that focuses on priority areas and times that would expect to result
in the maximum water quality benefits to receiving waters in 2025. This street -sweeping program will
consider the following:
1. Priority areas —the priority high -traffic arterials that discharge to the MS4 and streets that
serve commercial and industrial use areas.
2. Program timing— once between July and September and two other times during the year
that would benefit water quality in receiving waters with the goal of 90% of high -priority
areas swept each time.
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City of Port Orchard Stormwater Management Program — 2025
3. Operational procedures —to guide O&M on how best to maintain and perform street
sweeping with the equipment that is provided —based on specifications and maintenance
manuals provided by the equipment manufacturer(s).
4. Street waste disposal —guided by the requirements in Appendix 6.
5. Reporting and tracking— mapping priority areas, sweeping dates and frequency, sweeper
types, total curb miles, and waste removed.
S5.C.7.e Staff Training The city continues its development and implementation of a
comprehensive operations and maintenance training program for
employees whose job functions involve construction, operations, or maintenance that may impact
stormwater quality. The training provides hands-on, practical guidance on critical topics, including:
• Protecting water quality
• Performingjob duties to prevent or minimize impacts to water quality
• Operations and maintenance standards
• Inspection procedures
• Stormwater Pollution Prevention Plans (SWPPP)
• Street Sweeper Operation
• Selecting appropriate BMPs
• Procedures for reporting water quality concerns
The city maintains thorough documentation of each training session, ensuring the program stays
up-to-date.
XI. Total Maximum Daily Load (TMDL)
Permit Requirement S7
The City is required to comply with the Sinclair and Dyes Inlets Fecal Coliform Bacteria TMDL and
Water Quality Improvement Plan requirements as approved by Ecology and the EPA. The actions
required are:
✓ Encourage prevention of bacterial source potential in composting facilities, veterinary
establishments, support activities for animal production, and automotive shops.
✓ Increase awareness of bacterial pollution problems and promote proper pet waste
management.
✓ Maintain pet waste collection stations.
✓ When conducting IDDE field screening— screen for bacteria in TMDL areas.
Appendix 3 Business Inspections In 2025, the UCS will identify and add the following
establishments to the priority inspection list if they are not
already identified: compostingfacilities, veterinary establishments, businesses that provide support
for animal production, and automotive shops within the City. The UCS will then inspect these
businesses, paying special attention to whether Best Management Practices (BMPs) are in place to
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City of Port Orchard Stormwater Management Program — 2025
prevent potential bacterial sources of pollution. If the facility has failed to adequately implement
these BMPs, the UCS will educate the business, reinspect, and utilize progressive enforcement
measures as necessary. This will be completed as part of the Source Control Program for Existing
Development as outlined in section IX.
Appendix 3 Public Education and Outreach The City is committed to increasing awareness of
bacterial pollution problems and promoting pet
waste management through the general awareness campaign outlined in section III.
Appendix 3 Operations and Maintenance The City's parks and facilities division, within the
Operations and Maintenance (O&M) Department,
maintains pet waste collection stations along Sinclair Inlet and in local parks where the public
frequently brings their pets for exercise and recreation. These areas are identified as having the
highest potential for stormwater pollution. The City will periodically update these areas and add pet
waste collection stations as needed.
Appendix 3 IDDE When conducting IDDE field screening, as outlined in section VI, the City will
follow these steps to screen for bacteria in established TMDL areas:
• Conduct field screening at the most downstream accessible location in each drainage
circuit, such as discharge points or outfalls, to detect bacteria sources.
• Collect grab samples from the MS4 conveyance system, discharge points, and outfalls
when there is flow.
• Adhere to adopted IDDE protocols for identifying and eliminating illicit discharges.
• Focus on identifying sources of bacterial contamination.
• Record and document all screening and sampling results and report annually.
XII. Monitoring
Permit Requirement S8
The City of Port Orchard has conducted monitoring to detect illicit discharges and screen for illicit
connections. This monitoring has occurred throughout the City and will continue as necessary to
provide further characterization. To fulfill permit requirements under Section S8, the City has
chosen to pay fees to the Washington State Department of Ecology to support the Stormwater
Action Monitoring (SAM) program. Additionally, Kitsap County performs annual monitoring at four
freshwater and seven marine stations located within the City of Port Orchard's watersheds through
the county's Pollution Identification and Correction Program.
XIII. Conclusion
The City of Port Orchard has developed its 2025 Stormwater Management Program Plan to ensure
compliance with the Municipal NPDES Phase II Permit requirements. In accordance with the Permit,
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City of Port Orchard Stormwater Management Program — 2025
the City will update the Plan each year to track progress in implementing the stormwater program
components required for Phase II Permit compliance. The latest Annual Report, Stormwater
Management Program, and Municipal NPDES Phase II Permit can be accessed on the City's website.
Printed copies are also available upon request through the Public Works office.
The City welcomes public participation in developing the Stormwater Management Program Plan.
Please contact the Public Works Department with any questions, comments, or suggestions.
Mail: City of Port Orchard Public Works
216 Prospect Street
Port Orchard, WA 98366
Phone: 360-876-4991
Email: publicworks(a_portorchardwa.gov
Website: https://portorchardwa.gov/
ORCHARD .
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