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HomeNewsCity of Williams Lake awards flood risk assessment, mapping, and mitigation study...

City of Williams Lake awards flood risk assessment, mapping, and mitigation study contract

The City of Williams Lake has awarded a $134,000 contact for a Flood Risk Assessment, Mapping, and Mitigation Study to Tetra Tech Canada.

Earlier this year, the City was successful in receiving $150,000 from a Flood Risk Assessment, Flood Mapping and Flood Mitigation Planning grant to put towards the study.

The scope of the Flood Risk Assessment, Flood Mapping, and Mitigation Study is as follows:

  • Site inspection and survey for hydraulic and geomorphological analysis for a 50-year, 100-year, 200-year, 300-year and 500-year flood event; 
  • Hydraulic modelling; 
  • Flood hazard assessment including wind wave and wave run-up assessment; 
  • Flood inundation, hazard and erosion mapping: this will identify the extent of inundation and hazard (low, medium, high) around the lake and Williams Lake River; 
  • Flood risk analysis and mapping; 
  • Flood construction elevation levels; 
  • Development of flood mitigation plan mainly for the River Valley area infrastructure and Class D cost estimates to be able to apply for future mitigation grants. 
  • Identify recommendations for future flood mitigation efforts.

A total of 8 proposals were received. Tetra Teach received the highest weighted score of 93.83 and presented a firm understanding of all the project requirements and deliverables. Though they were not the least expensive contract, they presented the most comprehensive scope of work within the given budget.

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