Covell Area Drainage Study Update #2. January 3rd, :30 P.M. Edison Middle School

Transcription

1 Covell Area Drainage Study Update #2 Informational Meeting January 3rd, :30 P.M. Edison Middle School

2 Covell Area Basin Study Area Map Basin Area 980 Acres Width Approx. 1 Mi Length Approx. Approx 2 Mi

3 Project Background Project Background Schedule of Events: 2004 Rain R i Events E t Prompted P t d Initial I iti l Evaluation E l ti Evaluation Identified Several Projects: 30th Street St t & C Covellll A Avenue A Area B D Drainage i Improvements (2005) 30th Street & Covell Avenue Area A Phase 1 Storm Sewer Improvements (2006) 30th Street & Covell Avenue Area A Phase 2 Storm Sewer Improvements (2007) 30th Street & Covell Avenue Area A Phase 3 Storm Sewer Improvements p ((2008))

4 Project Background Project Background Covell Area B Drainage Improvements (2005)

5 Project Background Project Background Covell Avenue Area A Phase 1 Storm Sewer Improvements (2006)

6 Project Background Project Background 30th Street & Covell Avenue Area A A Phase Phase 2 Storm Sewer Improvements (2007) Edison Middle School Football Field

7 Existing Existing Detention Facilities Facilities

8 Project Background Project Background Schedule of Events Cont: 2010 Rain Events prompted additional discussion with City Staff due to localized flooding and high groundwater 2011 Rain Events p produced issues brought g to the attention of City Staff in the Covell Drainage Basin 2011 Events prompted August 25th, 2011 Public Meeting with City Staff

9 Project Background Project Background Schedule of Events Cont: Late November 2011 HDR was hired by City of Sioux Falls to evaluate the Covell Drainage Basin Early December 2011 / Early February 2012 p the Data Collection p phase of the HDR completed Study February 2012 / April HDR constructed Storm Water Model Completed a Verification Exercise with the July 2011 Rainfall event

10 Project Background Project Background Schedule of Events Cont: June 2012 Conducted Public Update Meeting to obtain verification of our existing model results July 2012 / Dec 2012 Developed alternatives to review within the basin and are startingg to prepare an outline for the study

11 Alternatives Review GOALS Develop a model that best depicts the hydrologic properties and hydraulic ability of the basin Review and screen alternatives for discussion purposes Provide Mitigation solutions to the extent possible for the ongoing issues experienced j events duringg major Respond to Public Comments to our best ability

12 Benefit Improves Efficiency ffi i off Underground System (20% Capacity Increase) Alternatives Review Alternative #1

13 Public Comments Benefit Improves Efficiency ffi i off Underground System (20% Capacity Increase) Alternatives Review Alternative #1

14 W. 28th Street Covell A Avenue Connect to Inlet at Corner Public Comments Benefit Reduces d d duration i off Standing Water in Rear yards Alternatives Review Alternative #2

15 Grange A Avenue Grange Avenue This option does not appear to provide much relief in regards to surface water reduction W. 33rd Street Alternatives Alt ti R Review i Alternative #3

16 W. 33rd Street Lake Avenue New Storm Sewer 33rd Street P bli Comments C t Public Grrange Avenue Underground U d d Detention New 48 Storm Sewer to 37th Street Benefit Benefit Provides additional storage (14.2 Acre Feet) for Large Events Alternatives Alt ti R Review i Alternative #4

17 Lakke Avenue Public Comments W. 37th Street Benefit Benefit Maximizes use of On site Detention by preventing Storm Sewer Backflow Alternatives Alt ti R Review i Alternative #5

18 W. 29th Street Co ovell Avenue Glendalee Avenue Public Comments W. 33rd Street Alternatives Alt ti R Review i Alternative #6

19 W. 29th Street Public is Comments What needed? Above Ground Ab G dd Detention t ti St Storage Approximately 30 Acre Feet in storage is needed (750 x 300 footprint x 6 deep) No open space is available that is not already being used as detention Co ovell Avenue Glendalee Avenue Installation of larger storm sewer pipes alone will not serve the basin without additional surface storage W. 33rd Street Alternatives Alt ti R Review i Alternative #6

20 W. 29th Street Options Public Comments is needed? As streetwhat improvements are warranted add inlets to maximize Ab Above Ground G dd Detention t tistorm St Storage system, possibly minor sewer size Approximately 30 Acre Feet in increases storage is needed (750 x 300 footprint x 6 deep)streets for Lower Lower residential Co ovell Avenue Glendalee Avenue additional on street storage. No open space is available that is not alreadysale being as detention Voluntary of used property to City in order to develop additional green Installation of larger storm sewer space for surface detention pipes alone will not serve the basin without additional surface storage Homeowners can continue to complete l t fl flood d proofing fi efforts ff t to t the extent possible and around W. 33rdinStreet your homes Alternatives Alt ti R Review i Alternative #6

21 Next Next Steps Steps Take Public Comment Continue to Screen Matrix of Alternatives Finalize Drainage Study Develop Capital Plan for Improvements

22 Moving Forward Moving Forward Program Improvements into the Capital Improvements Plan (CIP) Following projects will be programmed in the next CIP Update Alternative 1 Improvements at Edison g Detention Underground Alternative 2 Backyard Drainage at 28th Street and Covell Avenue Alternative 5 Installation of Flap Gate at Augustana Pond

23 Q ti Questions