Item No.: 6c_supp 
Date of Meeting: September 27, 2016 
Marine Stormwater Utility 
Interlocal Agreement
with City of Seattle 

1

Stormwater Utility Opportunity 
Improve Puget Sounds Water
quality 
Address competitive issues for
Maritime businesses and tenants 
Fund needed investments and
operations 
Stormwater Utility has triple bottom line impacts 
2

Stormwater Requirements 
Next 5 years 
Port system: 78 miles of stormwater pipes and other
aging infrastructure 
Increased system maintenance and industrial treatment
at Marine Terminals 
Stormwater fees for the next 5 years projected to exceed
$25M 
Invest in stormwater infrastructure assessment and
$25 million could be used to
rehabilitation 
assess & repair 23 miles 
Century Agenda Goal: meet or exceed requirements for   of Port-owned stormwater
stormwater leaving Port properties                      pipes 
Stormwater Utility funds will help to improve stormwater quality 
3

Port and City Obligations & Authority 
Obligations 
Both the City and Port have a Phase 1 municipal permit that governs
our stormwater programs 
Authority 
RCW 53.08.043 expressly grants port districts "all of the powers
relating to systems of sewerage authorized by RCW 35.67.010 and
35.67.020 [utility statutes for Cities]" 

The Port has the authority to establish a Stormwater Utility 
4

2016 Stormwater Utility Work 
Purchase CCTV truck 
Begin to assess stormwater
infrastructure 
Identify and prioritize urgent repairs 
Highlights 
Install tide gates & down-turned
elbows 
Line repairs at Terminal 18 
Dock cleaning 

Utility work to is getting started in 2016 
5

Stormwater Goal: 
assessing and rehabilitating stormwater pipes 
Assess         Rehabilitate       Miles of Pipe
Year 
(% of pipes)        (% of pipes)       Rehabilitated 
2016            15             6             5 
2017            30             12             9 
2019            100            24             19 
2020                          30             23 
2025                          45             35 
2030                          60             47 
2035                          75             59 
Port will progress toward Century Agenda Goal to meet or exceed requirements 
6