DC Clean Rivers Project - Green Infrastructure Program. ACEC What s New at DC Water?

Transcription

1 District of Columbia Water and Sewer Authority George S. Hawkins, General Manager Briefing on: DC Clean Rivers Project - Green Infrastructure Program Briefing for: ACEC What s New at DC Water? April 7, 2016

2 Agenda Welcome DC Clean Rivers Project Overview Rock Creek and Potomac River Projects Schedules and Next Steps Questions Green Roof at Fort Reno Reservoir Bioretention in Right-of-Way Bioretention in Right-of-Way 2

3 DC Clean Rivers Project Overview: Sewer Systems in DC Sunny Day Rainy Day* Combined Sewer System 1 pipe Combined Sewer Overflow = CSO Outfall pipe Outfall pipe Separate Sewer System 2 pipes Outfall pipe Outfall pipe *Discharge occurs when pipe s capacity is exceeded 3

4 DC Clean Rivers Project Overview: Where is the Combined Sewer System Located? CSO Outfalls Blue Plains Combined Sewer Drainage Area Municipal Separate Storm Sewer System (MS4) Area Combined Sewer System covers 1/3 of the District (12,478 acres) 47 Active CSO outfalls 13 to Anacostia 10 to Potomac 24 to Rock Creek Three receiving waters Anacostia River Potomac River Rock Creek 4

5 DC Clean Rivers Project Overview: Magnitude of the Problem, DC Water s Solution LTCP Completed (DC Water Formed) Program Completion 96% Reduction 3254 CSO Overflow (mg/avg year) Total System Anacostia River Potomac River Rock Creek Total System 5

6 DC Clean Rivers Project Overview: Consent Decree Timeline January 14, 2016 Consent Decree Modification Entered in Federal Court Public Participation Public Participation 6

7 DC Clean Rivers Project Overview: Modified Long Term Control Plan CSO s 027, 028, 029: Manage volume equal to 1.2 of rain falling on 133 impervious acres CSO 049: Manage volume equal to 1.2 of rain falling on 365 impervious acres CSO s 025, 026: Separate sewers CSO s : Control using Potomac River Tunnel 7

8 DC Clean Rivers Project Overview: GI Implementation - Consent Decree Schedule Potomac River GI Potomac River Projects - A1 and A2 Rock Creek GI Rock Creek Project - A 8

9 DC Clean Rivers Project Overview: GI Program Drivers Volume Management (Gallons/Cubic Feet) Control Combined Sewer Overflows Cost Effectiveness Responsibility to Rate Payers Maintenance/Asset Management Safety Aesthetics Performance Outreach Build Public Awareness and Stewardship Triple Bottom Line Benefits Deliver Multiple Benefits to the Community 9

10 Rock Creek Project A: Boundary, Performance, and Schedule Requirements Contract Volume Requirement: Manage 1.2 of runoff from impervious acres RFP Development: mid 2016 Procurement: mid 2016 early 2017 Design-Build: early Place in Operation: 3/30/19* Monitoring: Throughout: Public Outreach & Engagement Coordination with District Agencies Rock Creek GI Area Rock Creek Project A *Consent Decree Deadline Rock Creek Project A 10

11 Potomac River Project A1: Boundary, Performance, and Schedule Requirements Contract Volume Requirement: Manage 1.2 of runoff from impervious acres Potomac River GI Area RFP Development: late 2016 Procurement: late 2016 mid 2017 Design-Build: mid Place in Operation: 6/23/19* Monitoring: Throughout: Public Outreach & Engagement Coordination with District Agencies Potomac River Project A1 Potomac River Project A1 *Consent Decree Deadline 11

12 Potomac River Project A2: Boundary, Performance, and Schedule Requirements Contract Volume Requirement: Manage 1.2 of runoff from impervious acres Potomac River GI Area RFP Development: late 2016 Procurement: late 2016 mid 2017 Design-Build: mid Place in Operation: 6/23/19* Monitoring: Throughout: Public Outreach & Engagement Coordination with District Agencies Potomac River Project A2 Potomac River Project A2 *Consent Decree Deadline 12

13 Rock Creek and Potomac River Projects: Expected GI Technologies Typical Bioretention Physical Components Inlet with Energy Dissipation (Downstream Outlet Not Shown) Safety Fence Bioretention Soil Media Impermeable Liner Choker Layer to Prevent BSM Migration Aggregate Layer for Storage Perforated Underdrain Connects to Solid Pipe to Sewer Separate Sewer System Typical Sizing Approximate width: Width of planter strip and or parking lane (for curb extension bioretention) Approximate Depth: 4-6 Approximate Length: Note: Utilities not shown (adjacent and within facility) 13

14 Rock Creek and Potomac River Projects: Expected GI Technologies Typical Bioretention Two Applications: Planter Bioretention Curb Extension Bioretention Variations for Additional Storage: Option for combined Planter Bioretention & Curb Extension Bioretention Option for subsurface adjacent aggregate storage under sidewalk Separate Sewer System Planter Bioretention Curb Extension Bioretention in Parking/No Parking Lane 14

15 Rock Creek and Potomac River Projects: Expected GI Technologies Typical Permeable Pavement Physical Components Permeable Pavement (Type to be Selected Based on Site-Specific Conditions) Choker Layer to Prevent Sediment Migration Impermeable Liner Storage Layer Perforated Underdrain connects to Solid Pipe to Sewer Separate Sewer System Typical Sizing Approximate width: Width of parking lane/alley Approximate Length: Up to entire length of parking lane/alley Approximate Depth: 3-4 Note: Utilities not shown (adjacent and within facility) Permeable Pavement 15

16 Rock Creek and Potomac River Projects: Expected GI Technologies Typical Permeable Pavement Two Applications: Parking Lane Permeable Pavement Alley Permeable Pavement Separate Sewer System Parking Lane Permeable Pavement Alley Permeable Pavement 16

17 Rock Creek and Potomac River Projects: Expected GI Technologies Typical Parking Lane Storage Physical Components New Pavement (Type to be Selected Based on Site-Specific Conditions) Inlet Storage Layer Impermeable Liner Perforated Underdrain Connects to Solid Pipe to Sewer Parking Lane Subsurface Storage Typical Sizing Approximate width: Up to full width of parking lane/street Approximate length: Up to entire length of the block Approximate Depth: 3-4 Note: Utilities not shown (adjacent and within facility) 17

18 Rock Creek and Potomac River Projects: Expected GI Technologies Typical Crosswalk Subsurface Storage Physical Components New Pavement (Type to be Selected Based on Site-Specific Conditions) Inlet (Type to be Selected based on Site-Specific Conditions) Storage Layer Perforated Underdrain Connects to Solid Pipe to Sewer Typical Sizing Width: Entire width of crosswalk Length: Entire length of crosswalk Approximate depth: 3-4 Crosswalk Subsurface Storage Note: Utilities not shown (adjacent and within facility) 18

19 Rock Creek and Potomac River Projects: Expected GI Technologies Typical Sewer Separation Typical Sizing Approximate width: Varies based on site specific conditions Physical Components New Pavement Approximate length: Up to entire length of the block Approximate depth: Varies New Stormwater Pipe Existing Combined Sewer Pipe Piped Wastewater from Homes Sewer Separation Note: Utilities not shown (adjacent and within facility) 19

20 Rock Creek and Potomac River Projects: Current Estimated # of Facilities* GI Application RC-A PR-A1 PR-A2 Planter Bioretention 45% 10% Curb Extension Bioretention 15% 25% Parking Lane Permeable Pavement 15% 40% Alley Permeable Pavement 25% 25% 20% Subsurface Storage 75% Sewer Separation 5% *To be refined for 100% request for proposals; limited amounts of non-right-of-way bioretention and permeable pavement may be included. 20

21 Rock Creek and Potomac River Projects: Contract Organization DC Water and Sewer Authority (Director, DC Clean Rivers Project) Assistant Director DC Clean Rivers Project Program Consultants Organization (PCO) Project Review Board (Advises DC Water) Greeley and Hansen-and-Jacobs Associates (Assists in Administration of DC Clean Rivers Project) Design-Build Design-Bid-Build Design Builder Construction Manager A/E Construction Manager Contractor Designer Contractor (Contracts with DC Water) 21

22 Rock Creek and Potomac River Projects: Design Builder Roles and Responsibilities 50% - 60% Design of Projects (RC-A, PR-A1, and PR-A2). DC Water to provide the following: GI Facility Elements Locations of facilities specified Minimum volume specified Design details specified (lengths, widths, depths, materials) Underdrain requirements and proposed underdrain layouts and tie-ins Planting plans/palettes Design of temporary facilities not provided i.e., MOT, Support of Excavation, E&S, etc. Existing Conditions ROW Field Survey Field inventory for drainage from private property Level C utility survey (entire ROW) Level A utility survey (GI-specific locations) Geotechnical and Environmental Data Reports (GDR/EDR) Utilities (and existing conditions) information from survey Underdrain GI Facility Footprint GI Facility Drainage Area Unique GI Facility ID (linked to specific design parameters in RFQ) 22

23 Rock Creek and Potomac River Projects: Design Builder Roles and Responsibilities Design-Build Team Contractual Responsibilities Design Temporary Facilities and Obtain Permits Not Obtained by DC Water Construction of All Facilities Outreach (in Coordination with DCCR Outreach) Maintenance/Asset Management of all Facilities for Initial Maintenance Period (1 Year) Project Closeout Including Service Manuals (non-dccr standard elements) 23

24 Rock Creek and Potomac River Projects: CM Services Roles and Responsibilities Preparation of project CM plan Tracking construction permits Construction administration and CM services CM safety plan Independent QA/QC verification Project controls DC Water and third-party security programs Environmental compliance monitoring 24

25 Rock Creek and Potomac River Projects: Green Jobs Program in the District Green Jobs Memorandum of Agreement (MOA) created with District of Columbia and DC Water. Goal: 51% of new jobs created by contracts or procurements entered into by DC Water with third parties to implement GI required by modified decree are filled by District residents National Certification Program led by the Water Environment Federation Construction Inspection Maintenance First groups of District residents will be certified in: January 2017 (training to be held Fall 2016) August 2017 Installation of Green Roof at East Side Pumping Station National Certification Contract Details Available at: dcwater.com/green ( Resources Section) Pilot Green Roof Maintenance Training Course Graduates 25

26 Schedules and Next Steps: GI Design - Build Schedules Item RC-A PR-A1 PR-A2 Release RFQ February 18, 2016 February 18, 2016 February 18, 2016 SOQ/Technical Proposals due April 14, 2016 April 14, 2016 April 14, 2016 Notice to Proceed January, 2017 March, 2017 October, 2017 GI Construction Management Schedule Item Date Release RFQ March 31, 2016 SOQ/Technical Proposals due May 17, 2016 Notice to Proceed January, 2017 Contact Person to Request a Copy of the RFQs: Ms. Kimberly Isom / Kimberly.Isom@dcwater.com District of Columbia Water and Sewer Authority DC Clean Rivers Project Overlook Ave, SW., CMF 2nd Floor, Washington, DC

27 Questions? FOR MORE INFORMATION PLEASE CONTACT: Bethany Bezak, PE, LEED AP DC Clean Rivers Project Green Infrastructure Manager (202) OR VISIT THE WEBSITE: 27