HomeMy WebLinkAboutTIS 2024-04-22 Item 2I - Review - 2024 Draft Surface Water Comprehensive PlanTO:
FROM:
BY:
DATE:
SUBJECT:
Thomas McLeod, Mayor
Public M 'orks Depart r rent Hari Ponnekanti, Director/City Engineer
INFORMATIONAL MEMORANDUM
Transportation and Infrastructure Services Committee
Harry Ponnekanti, Public Works Director / City Engineer
Sherry Edquid, Project Manager
April 19, 2024
Surface Water Comprehensive Plan
Project No. 82141202
2024 Draft Surface Water Comprehensive Plan for Review
ISSUE
Introduce the proposed 2024 Draft Surface Water Comprehensive Plan (SWCP) and review
the Capital Improvement Projects.
BACKGROUND
The City hired Otak to update our SWCP to provide a strategic framework for addressing
drainage issues, water quality, erosion/sedimentation issues, habitat needs along with
maintenance and condition assessment of the existing stormwater system. This plan was last
updated in 2013.
DISCUSSION
The SWCP includes programmatic solutions and policies, studies, and future capital projects.
These recommendations were developed by reviewing past project lists, interviewing staff, and
conducting field assessments and public outreach. Past projects that are no longer needed are
removed, existing project costs are updated, and new projects are added to address
deficiencies and goals.
A total of 11 individual capital projects, 5 capital improvement programs, and 3 studies are being
proposed in the SWCP utilizing the 412 Surface Water fund:
• Norfolk Outfall Trunkline Sewer Separation
Preliminary Feasibility Study
• Tukwila Pond Stormwater Quality
Improvement
• Fort Dent Park Water Quality Retrofit
• Tukwila Parkway / Gilliam Creek Outfalls
Stormwater Improvement (updated)
• Johnson Creek Fish Barrier Mitigation
Alternatives Analysis
• S Ryan Way Pipe Rehabilitation
• Fish Passage Barrier Prioritization Study
• Middle Fork of Southgate Creek — Stream
and Slope Stability Study
• P17 Pond and Southcenter Subarea
Hydraulic Study
• Stormwater Management Action Plan
(SMAP) Programmatic CIP
• Ecosystem Services Conservation Program
Staff will present the draft SWCP at the May 20th Council Meeting followed by submitting the
final draft, obtaining SEPA determination, and bringing the SWCP forward for final adoption.
RECOMMENDATION
Information only — full draft will be coming to the full Council at the May 20th Meeting.
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