Document Request List: N/A

Engineering Consulting Services for Investigations of Chronic Basement Flooding Areas: 1 and 2

Disclaimer

Header
Reference Number 250422
Solicitation Number 9117-12-7182
Organization Name City of Toronto
Source ID PU.MU.ON.542969.C58822
Associated Components No

Dates
Published 2012-07-31
Revised
Closing 2012-08-22 12:00 PM Eastern Daylight Saving Time EDT

Details
Category Miscellaneous Goods
GSINS N99: Miscellaneous
Region of Delivery Ontario
Region of Opportunity Canada
Agreement Type
Tender Type Request for Proposal (RFP)
Estimated Value
Solicitation Method

Notice Description
Engineering Consulting Services for Investigations of Chronic Basement Flooding Areas: 1 and 2

Engineering Consulting Services for Investigations of Chronic Basement Flooding Areas: 1 and 2

Scope of work:
The Scope of Work includes but is not limited to the following.

.1 The purpose of this Request for Proposal (RFP) is to select a qualified consultant to undertake two (2) Municipal Class Environmental Assessment (EA) Studies to address chronic basement flooding issues in Basement Flooding (BF) Areas 1 and 2.
.2 The Consultant shall carry out one EA study for BF Area 1 and one EA study for BF Area 2 to recommend preferred solutions that can solve the flooding problems.
.3 While majority of BF Study Area 1 is serviced by the separated sewer systems, majority of BF Study Area 2 is serviced by the combined sewer system.
.4 The City has been embarking on several technical investigations to assess the problem of basement flooding in different parts of the City.
.5 The City has been developing hydrologic and hydraulic (H&H) models for these two basement flooding areas using flow monitoring data collected in 2008 and 2011 for calibration and verification. The City will provide these baseline H&H models to the Consultant. See Section 3.3.6 for descriptions of the models.
.6 The Consultant shall complete all components in the EAs, including collecting and reviewing data and background information, conducting field investigations, reviewing the baseline H&H models developed by the City, identifying the causes of flooding, developing and evaluating alternatives and recommending solutions for the flooding problems, participating in consultation events, reviewing input from the community and review agencies to inform study findings and recommendations, making recommendations, and documenting study findings and recommendations in EA report.

3.1 SCOPE OF SERVICES REVIEW
.1 The Consultant shall provide the following scope of works, any deviation from the scope of works shown below should be discussed with the City prior to implementation or outlined in the proposal; with saving or additional costs resulting from the deviation noted in the text of the Cost of Services proposal:
.2 Follow the Municipal Class Environmental Assessment (EA) planning and design process for Municipal Water and Wastewater Projects (Municipal Engineers Association, 2000 Amended 2007) and deliver two (2) EA studies for the Project Area that covers the storm drainage, sanitary sewer system and combined sewer system. At this stage, the City anticipates that the studies would follow the planning process for a Schedule ‘B' project, which includes the completion of Phase 1 (Problem or Opportunity) and Phase 2 (Alternative Solutions) of the Class EA process up to and including Notice of Completion. The task shall include preparation and maintenance of the Project File and written responses to comments from review agencies and members of public during the 30-day review period. In this project, the City will provide the baseline H&H models to the Consultant for hydraulic analysis of all sewer systems and storm drainage under existing conditions. Dual drainage modelling is used for the storm drainage assessment to determine the hydraulic grade line (HGL) in the storm and/or combined sewers and the water level in the overland flow paths.
.3 Collect and review relevant background information/data.
.4 Conduct field investigations to confirm or supplement the desk-top information.
.5 Analyse rain and flow monitoring data provided by the City.
.6 Review and understand the baseline H&H models developed by the City and report issues and discrepancies with information/data collected throughout the study.
.7 As a provisional item, revise, calibrate, verify and validate the baseline models based on information/data collected throughout the study that are critical to H&H modelling.
.8 Confirm its understanding of the models and accept the responsibility for using the "confirmed" H&H models as a base line for further undertaking in this study.
.9 Use the confirmed H&H models and analyze the modeling results under existing conditions.
.10 Identify the primary cause(s) of basement and surface flooding, and the mechanism(s) by which water enters the basements, including evaluation of the interaction amongst the storm sewer, sanitary sewer, combined sewer, surface drainage, and groundwater systems.
.11 Identify any other potential basement flooding clusters in the Project Area based on modelling results, noting that not all residents who experienced flooding have necessarily reported the incidents to the City.
.12 Identify the extents (both vertically and horizontally) of potential surface flooding.
.13 Develop a GIS-based topographical model to define the major system surface drainage patterns and identify/quantify low lying areas which do not have an outlet for the overland flow drainage.
.14 Use the confirmed H&H models as a base to further develop and evaluate alternative solutions to address basement and surface flooding problems.
.15 Recommend the preferred solution and determine cost per benefiting home for the preferred solution.
.16 Include in the proposed condition model, the impacts of the City's by-law for mandatory downspout disconnection which requires complete implementation of roof leader disconnection by 2011 in combined sewer areas and end of 2013 for flood prone areas. The Consultant shall model and evaluate the benefits of mandatory downspout disconnection and its impacts on the recommended design concepts of the preferred solution for the basement flooding remediation measures.
.17 Provide conceptual design to confirm constructability with associated estimated costs of the proposed works recommended in the preferred solution.
.18 Develop an implementation plan to prioritize the recommended projects in each of the study areas. The Consultant shall elaborate in details the considerations which were used in the prioritization of the projects for the implementation plan.

Please visit http://www.toronto.ca/tenders/index.htm
for additional information.

MERX asks that you contact the buying
agency directly to obtain associated documents.
The contact information can be found within
the notice abstract.

Contact(s)
Client Agency
Name Allison Phillips
Address
City
State / Province
Postal Code
Phone (416)397-4805
Fax
Email
Website URL