HURRICANE HERMINE Wastew ater Collection System Challenges and - - PowerPoint PPT Presentation

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HURRICANE HERMINE Wastew ater Collection System Challenges and Response Sept. 20, 2016 David W. Porter, P.E. Public Utilities Director myclearw ater.com | 1 CITY OF CLEARWATER Overview Mayor Cretekos Remarks Storm duration

SLIDE 1

1 CITY OF CLEARWATER

HURRICANE HERMINE

Wastew ater Collection System Challenges and Response

Sept. 20, 2016

David W. Porter, P.E. Public Utilities Director myclearw ater.com

SLIDE 2

2 CITY OF CLEARWATER

Overview

Mayor Cretekos’ Remarks
Storm duration Tuesday, Aug. 30 through Friday, Sept. 2
Rain (> 10”)
Sanitary Sewer Overflows:

– Corona Avenue area (2.9 Million Gallons) – North Greenwood area (18.8 Million Gallons) – Marshall Street WRF (10 Million Gallons)

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3 CITY OF CLEARWATER

Collection System Challenges

Hurricane caused Inflow and Infiltration to be far greater than typically

experienced

Flows were estimated at three to five times an average day
Collection system backup due to equipment failure at the MSWRF
Corona Avenue Collector Sewer bottleneck
Beach flooding induced excessive inflow and infiltration

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4 CITY OF CLEARWATER

Preparation and Response

Preparation began week before the storm
Response

– Wednesday, Aug. 31 at 7 a.m. to Wednesday, Sept. 8 at 7 a.m. 24/7 vacuum truck operations at Corona Interceptor bottleneck manhole – Staff responded to SSO reports 24/7 throughout system during entire event – Thursday, Sept. 1 to date – Marshall Street WRF lift station failure response with temporary pumps

Extensive, multi-year collection system inflow and infiltration

investigation and repair effort already underway

Corona Avenue Collector bottleneck solution final design underway

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5 CITY OF CLEARWATER

Moving Forward

Final completion of an after-event evaluation of storm-related issues

and responses

Continue inflow and infiltration investigation and repair efforts
Correct Corona Avenue Collector Sewer bottleneck
Repair Marshall Street WRF Influent Lift Station

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6 CITY OF CLEARWATER

HURRICANE HERMINE

Wastew ater Collection System Challenges and Response

Sept. 20, 2016