Trust and Confidence Report

Storm Water Management Profile

This service is responsible for the collection and transmission of storm water from all properties and roadways within Hamilton either to the natural environment, or to a wastewater treatment facility. This includes all support activities that are performed in order to achieve this service. Proper storm water management is necessary to control erosion, flooding, water quality, and to protect watercourses. This service includes activities performed by multiple divisions within the Public Works department.

Service Details

Related Subservices

  • Infrastructure Maintenance
  • Storm Water Collection
  • Storm Water Support Services
  • Storm Water Treatment

Type of Service

  • Public facing

Rationale

  • Essential/Mandatory, Legislated requirement

Primary Funding Sources

  • Rate Budget

Service Level

  • At standard

Service Level Source

  • Legislated

 

Performance Measures

2019


How much did you do? (volume)

  • 1087 mm Total Precipitation (Hamilton Munro Int’l Airport Rain Gauge)
  • Maintain 1175 km of storm pipes
  • Maintain two stormwater pumping stations
  • Maintain 126 stormwater management facilities
  • 42 unassumed stormwater management facilities (new developments)
  • Hamilton Water completes approximately 1,875 stormwater inlets and outfalls inspections per year which helps minimize flooding.  These inlets and outfalls as inspected periodically throughout the year and the sensitive inlets and outfalls are inspected before and after a major rain event
  • Operation 49 Oil/Grit separators

How well did you do it? (Quality)

  • 926 Staff-Hours were spent inspecting 126 stormwater management facilities.
  • Each stormwater management facility was inspected at least three (3) times in 2019.

Is anyone better off? (Impact)

  • Operation of 126 city owned stormwater management pond facilities controlling stormwater flows to protect downstream lands from erosion and flooding.
  • The City’s stormwater ‘quality’ control permanently holds enough water which could fill 46 Olympic swimming pools.
  •   The City’s stormwater ‘quantity’ control infrastructure has a volume capacity equal to that of the Roger’s Centre (formerly Sky Dome) 85% full of water with the dome closed.
  • 10,000 m^3 of sediment was removed from the stormwater management facility system in 2019. This is sediment diverted from entering natural waterways impacting water quality and aquatic habitat
  • Proactive inlets and outfalls inspections are completed throughout the year before and after major rain events to help minimize flooding.

How much did you do? (volume)

  • 966 mm Total Precipitation (Hamilton Munro Int’l Airport Rain Gauge)
  • Maintain 1175 km of storm pipes
  • Maintain two stormwater pumping facilities
  • Maintain 123 stormwater management facilities
  • 45 unassumed stormwater management ponds (new developments)
  • Hamilton Water completes approximately 1,875 stormwater inlets and outfalls inspections per year which helps minimize flooding.  These inlets and outfalls as inspected periodically throughout the year and the sensitive inlets and outfalls are inspected before and after a major rain events
  • Operation 48 Oil/Grit separators

How well did you do it? (Quality)

  • Consistently achieved 24/7 uninterrupted, reliable service and operation of the stormwater collection, retention and treatment system.
  • Spill Incident Response.  Achieved 1hr response to site 90% of the time.

Is anyone better off? (Impact)

  • The City’s stormwater ‘quality’ control permanently holds enough water which could fill 46 Olympic swimming pools
  • 1,250 m^3 of sediment cleaned out from stormwater management pond facilities in 2018. This is sediment diverted from entering natural waterways impacting water quality and fish habitat.
  • Operation of 123 city owned stormwater management pond facilities controlling stormwater flows to protect downstream lands from erosion and flooding.
  • 24 sanitary sewer lateral cross connections corrected in 2018 preventing discharge of sewage into City watercourses and the natural environment.
  • Proactive inlets and outfalls inspections are completed throughout the year before and after major rain events to help minimize flooding.

How much did you do? (volume)

  • Maintain 1149 km of storm pipes
  • Maintain two operating facilities
  • Maintain 185 storm water ponds
  • Hamilton Water  completes approximately 1300 stormwater inlets and outfalls per year which helps minimize flooding.  These inlets and outfalls as inspected periodically throughout the year and the sensitive inlets and outfalls are inspected before and after a major rain events

How well did you do it? (Quality)

  • Metrics under development, shared collaboration with HW/Roads/Operations. Timeline for Q1, 2019

Is anyone better off? (Impact)

  • Hamilton Water’s Sewer Lateral Cross Connection Program has corrected 291 cross connections across the city, which has resulted in approximately 143,500 litres of sewage being redirected from City watercourses and the natural environment into the City’s wastewater treatment facilities each day.
  • Pollution prevented from entering the natural environment and natural wildlife habitats protected.
  • Erosion in creeks and streams mitigated.
  • Safe passage for motor vehicles within design parameters for road drainage.

How much did you do? (volume)

  • Maintain 1149 km of storm pipes
  • Storm water collected and treated with sewage at the wastewater treatment plants: 6,156 ML
  • Maintain two operating facilities
  • Maintain 185 storm water ponds