Stormwater Project Meeting

Transcription

1 Stormwater Project Meeting City of South Burlington Presentation by: David P. Wheeler and Emmalee T. Cherington, Assistant Stormwater Superintendents Tom DiPietro, Deputy Director of Public Works City of South Burlington Public Works

2 Stormwater Project Meeting Agenda 6:00 Kennedy Drive Pond 2 6:20 Kennedy Drive Pond 7 6:40 Bartlett Bay Stormwater Treatment System Expansion 7:00 Deane Street / Woodcrest Drive Stormwater Project 7:20 Lindenwood Stormwater Project

3 Kennedy Drive Pond 2 Retrofit Original Construction in 2006

4 Location Map

5 Kennedy Drive Pond 2

6 Kennedy Drive Pond 2 Existing System Undersized Design Drainage Area: 0.76 Acres (0.71 Impervious) Actual Drainage Area: 3.53 Acres (2.23 Impervious) Only 0.15% Channel Protection Volume (CPv) Proposed Retrofit Expand system to meet CPv requirement Convert from Detention Pond into Gravel Wetland for increased phosphorous removal

7 Drainage Area Map

8 Draft Plans

9 Project Schedule & Funding 11/13/18 Public Meeting 1/15/19 12/15/19 - Project Engineering 1/15/20 Anticipated Bid Date 6/15/20 11/15/20 Construction Funding City received $253,616 VTrans Grant City obligation 20% match ($63,404)

10 Project Contact Dave Wheeler, Assistant Stormwater Superintendent x6113

11 Questions & Comments

12 Kennedy Drive Pond 7 Retrofit

13 Kennedy Drive Pond 7- Location Existing Location of Pond 7 Current Drainage Area

14 Kennedy Drive Pond 7- Brief Description of the Work Expand the existing Drainage Area of Pond 7 Located within impaired watershed-potash Brook Additional acres added to treatment Accommodate the 1-year storm Manage full Channel Protection Volume (CPv) Funding Received $300,000 Vtrans Grant City obligation 20% match ($75,000)

15 Draft Project Concept Connect to drainage area located north of Williston Rd. Proposing to modify existing pond into a gravel wetland. Potential wetland impacts will need to be determined. Enlarging existing pond is an alternate. Increases the acreage treated by 623%.

16 Project Schedule 11/13/18 - Public Meeting Thru Dec Project Engineering January Anticipated Bid Date 6 months- Anticipated Construction 12/2020- Anticipated Completion

17 Project Contact Emmalee Cherington, Assistant Stormwater Superintendent x 6115 echerington@sburl.com

18 Questions & Comments

19 Bartlett Bay Stormwater Treatment System Expansion (BBSTS)

20 BBSTS Location Map Existing Drainage Area Existing Stormwater Treatment

21 BBSTS Brief Description of Work Expand the existing Drainage Area of BBSTS Located within impaired watershed- Bartlett Brook Additional 9.34 acres of impervious area Accommodate the 1-year storm 15% flow reduction target for Bartlett Brook TMDL Funding Received $375,720 Vtrans Grant City obligation 20% match ($93,930)

22 Draft Project Concept Connect to drainage area at Harborview Drive and US Route 7. Proposing to expand existing treatment wetland. Additional 800 FT of culvert. Reposition existing access road Not impacting Class II wetland Additional Drainage Area

23 Draft Plans

24 Draft Plans

25 Draft Plans

26 Draft Plans

27 Project Schedule 11/13/18 - Public Meeting Thru Dec Project Engineering January Anticipated Bid Date 8 months- Anticipated Construction 12/2020- Anticipated Completion

28 Project Contact Emmalee Cherington, Assistant Stormwater Superintendent x6115

29 Questions & Comments

30 Deane Street / Woodcrest Drive Stormwater Project West End of Deane Street

31 Project Location

32 Project Location

33 Deane Street/Woodcrest Drive Existing Conditions Drainage Area: 7.46 Acres (2.38 Impervious) Collection system discharges directly to Potash Brook Proposed Project Infiltration chambers in Right of Way (ROW) sized to meet Water Quality Volume (WQv) and Channel Protection Volume (CPv) requirements

34 Drainage Area Map

35 Draft Plans

36

37 Project Schedule & Funding 11/13/18 Public Meeting 8/30/17 8/15/19 - Project Engineering 3/15/19 Anticipated Bid Date 6/15/19 11/15/19 Construction Funding City received $242,000 VTrans Grant City obligation 20% match ($60,500)

38 Project Contact Emmalee Cherington, Assistant Stormwater Superintendent x6115

39 Questions & Comments

40 Lindenwood Stormwater Project Path at End of Lindenwood Drive

41 Project Location

42 Project Location

43 Existing Conditions Lindenwood Drive Drainage Area: 10.6 Acres (2.2 Impervious) Collection system along Brewer Parkway discharges directly to Potash Brook. Proposed Project Install collection system along Lindenwood Dr. Construct Infiltration Basin on City owned parcel to meet WQv and CPv requirements

44 Drainage Area Map

45 Draft Plans

46

47 Project Schedule & Funding 11/13/18 Public Meeting 8/30/17 12/15/19 - Project Engineering 1/15/20 Anticipated Bid Date 6/15/20 9/15/21 Construction Funding City received $303,574 VTrans Grant City obligation 20% match ($76,000)

48 Project Contact Dave Wheeler, Assistant Stormwater Superintendent x6113

49 Questions & Comments