TITLE:
title
ACCEPTANCE OF PART 1 OF THE STORM DRAIN MASTER DRAINAGE PLAN (SDMDP) UPDATE
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DEPARTMENT: PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION
PRESENTED BY: RAJA SETHURAMAN, PUBLIC WORKS DIRECTOR
CONTACT INFORMATION: SEUNG YANG, P.E., CITY ENGINEER, (714) 754-5633
RECOMMENDATION:
recommendation
Staff recommends the City Council accept Part 1 of the Storm Drain Master Drainage Plan (SDMDP) update consisting of the Existing Conditions Assessment Report (ECAR) and the Proposed Drainage & Water Quality Improvements.
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BACKGROUND:
In 2006, the City Council amended Costa Mesa Municipal Code Section 15-64 (Title 15, Chapter III) to identify and put into effect a Storm Drain Master Drainage Plan (SDMDP). The 2006 SDMDP was approved by the City Council and analyzed the existing storm drain system throughout the City using a "Rational Method". The detailed analysis aimed to model the effects of 25-year and 100-year design storms on the City's storm drain system. The 2006 SDMPD proposed storm drain upgrades and estimated storm drain improvement costs throughout the City.
On September 15, 2020, the City Council awarded a Professional Services Agreement (PSA) to Q3 Consulting (Q3) to complete an update to the City's SDMDP. Similar to the 2006 SDMDP, the current update is divided into three parts for a comprehensive and thorough analysis.
Part 1 focuses on the hydrologic modeling, planning, design, and maintenance of the City's storm drain system as it operates today and proposes ranked improvements for future upgrades to the City's storm drain system. Part 1 includes an Existing Conditions Assessment Report (ECAR) and a Proposed Drainage and Water Quality Improvements report. The reports can be found on the City's website at www.costamesaca.gov/storm.
Part 2 of the SDMDP is the City's drainage fee and Finance study update. This update is derived from proposed improvements outlined in Part 1, current existing parcel land use types, and the City's 203...
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