Alternatives with higher scores are considered more ... - City of Waterloo
SILVER LAKE AND LAUREL CREEK REHABILITATION IN WATERLOO PARK – ENVIRONMENTAL ASSESSMENT ADDENDUM PROJECT PUBLIC INFORMATION CENTRE #3 – MARCH 20, 2018
Alternative 1: Do Nothing (Baseline)
Alternative 2: Dredge Silver Lake to Original Conditions
Alternative 3: Dredge and Reconfigure Silver Lake
Alternative 4: Create a Channel for Laurel Creek Around Silver Lake
Alternative 5: Remove Silver Lake
Water Quality
0
5
10
10
10
Sediment Management
0
5
10
5
10
Geomorphology
0
10
5
10
10
Terrestrial Species &Habitat
0
5
5
10
10
Wetland Species & Habitat
0
0
0
5
10
Aquatic Species & Habitat
0
5
5
10
5
Goose Management
0
0
5
5
10
Flood Protection
0
5
10
10
10
Ease of Implementation
10
5
5
0
0
Cultural/Heritage Resources
0
5
10
0
0
Community Health
0
5
5
5
10
Recreational Opportunity
0
5
10
5
0
Educational Opportunity
0
10
10
5
0
Occupational Health
0
5
5
5
10
Visual Aesthetics
0
10
10
5
0
Operation & Maintenance
10
5
10
5
10
Lifecycle Costs
10
5
5
5
10
Capital Cost
10
5
5
0
0
Total
40
95
125
100
115
Normalized Total
15.0
21.0
28.2
20.4
24.3
Category & Criterion Natural Environment
Alternatives with higher scores are considered more preferred or feasible than those with lower scores.
Technical
Social/Cultural
Economic
The evaluation was conducted as a collective exercise with the Project team who assigned a measure (high/positive, moderate, or low/negative) to the anticipated impact of the alternative solution. These measures were converted to an assigned numerical score (10, 5, or 0). The scores were totaled and normalized by category to provide an overall score for each alternative. PR0315181253KWO
SILVER LAKE AND LAUREL CREEK REHABILITATION IN WATERLOO PARK – ENVIRONMENTAL ASSESSMENT ADDENDUM PROJECT PUBLIC INFORMATION CENTRE #3 – MARCH 20, 2018
Alternative 3: Dredge and Reconfigure Silver Lake
SILVER LAKE AND LAUREL CREEK REHABILITATION IN WATERLOO PARK – ENVIRONMENTAL ASSESSMENT ADDENDUM PROJECT PUBLIC INFORMATION CENTRE #3 – MARCH 20, 2018
Next Steps
Prepare Environmental Impact Study
The Notice of Completion
The 30-day review period will commence
Detailed design to begin in 2019
Public and agency consultation is a key component of the Class EA process, and we value your input.
This alternative would see the sediments in lake dredged (and properly managed) with additional measures taken to improve the circulation of water in the lake to improve the water quality. Measures may include:
reconfiguring the footprint/shoreline of the lake; and/or,
changing the depth of the lake; and/or,
implementing sediment management and water quality improvement components such as a forebay up or downstream of the Light Rail Trail.
Additional measures include spot repairs along Laurel Creek in the west study area such as debris removal, pedestrian bridge improvements, weir removal, gabion replacement, or bank stabilization, all using natural channel design principles.
For additional information, please contact: Steve Brown, MBA, P.Eng. Project Manager Stantec 100-300 Hagey Boulevard Waterloo, ON N2L 0A4 Phone: (519) 585-7446 Email: [email protected] Jessica Kellerman, P.Eng. Project Manager, Water Resources Engineering Services, Design & Construction City of Waterloo Waterloo City Centre 100 Regina St. S Waterloo, ON N2J 4A8 Phone: (519) 886-1550 x78243 Email: [email protected] http://www.waterloo.ca/en/gettingactive/silverlake.asp
Silver Lake and Laurel Creek Rehabilitation in Waterloo Park – Environmental Assessment Addendum Project Public Information Centre #3 – March 20, 2018
Information Brief Introduction The City of Waterloo is conducting a study to identify and evaluate alternatives to rehabilitate Silver Lake and Laurel Creek in Waterloo Park. The study to rehabilitate Silver Lake and Laurel Creek has followed the requirements under the Municipal Class Environmental Assessment (EA) process.
Problem Statement Currently, surface water discharge creates poor water quality and sediment conditions in Silver Lake, and contributes to the instability of Laurel Creek. Stream restoration is required to improve water conveyance in the Park, while maintaining attention to the flooding limits, natural aesthetics of the Park, cultural landscape elements, and the short and long-term implementation concepts. The study has identified the recommended preferred alternative solution for enhancing and protecting the ecological function and natural features within the Park.
Preferred Solution A detailed evaluation of the five potential solutions was conducted by assigning a score to the anticipated impact of the alternative. The scores were then totaled and normalized. The evaluation process identified Alternative 3: Dredge and Reconfigure Silver Lake as the preferred solution.
PR0315181253KWO
Alternative 1: Do Nothing (Baseline)
Alternative 2: Dredge Silver Lake to Original Conditions
Alternative 3: Dredge and Reconfigure Silver Lake
Alternative 4: Create a Channel for Laurel Creek Around Silver Lake
Alternative 5: Remove Silver Lake
Water Quality
0
5
10
10
10
Sediment Management
0
5
10
5
10
Geomorphology
0
10
5
10
10
Terrestrial Species &Habitat
0
5
5
10
10
Wetland Species & Habitat
0
0
0
5
10
Aquatic Species & Habitat
0
5
5
10
5
Goose Management
0
0
5
5
10
Flood Protection
0
5
10
10
10
Ease of Implementation
10
5
5
0
0
Cultural/Heritage Resources
0
5
10
0
0
Community Health
0
5
5
5
10
Recreational Opportunity
0
5
10
5
0
Educational Opportunity
0
10
10
5
0
Occupational Health
0
5
5
5
10
Visual Aesthetics
0
10
10
5
0
Operation & Maintenance
10
5
10
5
10
Lifecycle Costs
10
5
5
5
10
Capital Cost
10
5
5
0
0
Total
40
95
125
100
115
Normalized Total
15.0
21.0
28.2
20.4
24.3
Category & Criterion Natural Environment
Alternatives with higher scores are considered more preferred or feasible than those with lower scores.
Technical
Social/Cultural
Economic
The evaluation was conducted as a collective exercise with the Project team who assigned a measure (high/positive, moderate, or low/negative) to the anticipated impact of the alternative solution. These measures were converted to an assigned numerical score (10, 5, or 0). The scores were totaled and normalized by category to provide an overall score for each alternative. PR0315181253KWO
SILVER LAKE AND LAUREL CREEK REHABILITATION IN WATERLOO PARK – ENVIRONMENTAL ASSESSMENT ADDENDUM PROJECT PUBLIC INFORMATION CENTRE #3 – MARCH 20, 2018
Alternative 3: Dredge and Reconfigure Silver Lake
SILVER LAKE AND LAUREL CREEK REHABILITATION IN WATERLOO PARK – ENVIRONMENTAL ASSESSMENT ADDENDUM PROJECT PUBLIC INFORMATION CENTRE #3 – MARCH 20, 2018
Next Steps
Prepare Environmental Impact Study
The Notice of Completion
The 30-day review period will commence
Detailed design to begin in 2019
Public and agency consultation is a key component of the Class EA process, and we value your input.
This alternative would see the sediments in lake dredged (and properly managed) with additional measures taken to improve the circulation of water in the lake to improve the water quality. Measures may include:
reconfiguring the footprint/shoreline of the lake; and/or,
changing the depth of the lake; and/or,
implementing sediment management and water quality improvement components such as a forebay up or downstream of the Light Rail Trail.
Additional measures include spot repairs along Laurel Creek in the west study area such as debris removal, pedestrian bridge improvements, weir removal, gabion replacement, or bank stabilization, all using natural channel design principles.
For additional information, please contact: Steve Brown, MBA, P.Eng. Project Manager Stantec 100-300 Hagey Boulevard Waterloo, ON N2L 0A4 Phone: (519) 585-7446 Email: [email protected] Jessica Kellerman, P.Eng. Project Manager, Water Resources Engineering Services, Design & Construction City of Waterloo Waterloo City Centre 100 Regina St. S Waterloo, ON N2J 4A8 Phone: (519) 886-1550 x78243 Email: [email protected] http://www.waterloo.ca/en/gettingactive/silverlake.asp
Silver Lake and Laurel Creek Rehabilitation in Waterloo Park – Environmental Assessment Addendum Project Public Information Centre #3 – March 20, 2018
Information Brief Introduction The City of Waterloo is conducting a study to identify and evaluate alternatives to rehabilitate Silver Lake and Laurel Creek in Waterloo Park. The study to rehabilitate Silver Lake and Laurel Creek has followed the requirements under the Municipal Class Environmental Assessment (EA) process.
Problem Statement Currently, surface water discharge creates poor water quality and sediment conditions in Silver Lake, and contributes to the instability of Laurel Creek. Stream restoration is required to improve water conveyance in the Park, while maintaining attention to the flooding limits, natural aesthetics of the Park, cultural landscape elements, and the short and long-term implementation concepts. The study has identified the recommended preferred alternative solution for enhancing and protecting the ecological function and natural features within the Park.
Preferred Solution A detailed evaluation of the five potential solutions was conducted by assigning a score to the anticipated impact of the alternative. The scores were then totaled and normalized. The evaluation process identified Alternative 3: Dredge and Reconfigure Silver Lake as the preferred solution.
PR0315181253KWO
