Stakeholder Meeting Dr ainage Investigation and F looding - PowerPoint PPT Presentation

Stakeholder Meeting Dr ainage Investigation and F looding Analysis Whitwell Avenue Ar ea City Pr ojec t 16-040 June 1, 2016 Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

Ag e nda E xisting Conditions and Challenges • Pr oposed Study • Public Obser vations and Input • Next Steps • Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

E xisting Co nditio ns a nd Cha lle ng e s L a rg e wa te rshe d d ra ining • to ne ig hb o rho o d – 262 a c re s – Almo st c o mple te ly b uilt-o ut Po o r so ils • – Ve ry slo w to infiltra te sto rmwa te r Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

E xisting Co nditio ns a nd Cha lle ng e s Ne ig hb o rho o d is • lo c a te d in na tura l lo w-po int Ve ry fla t Mo a t, • diffic ult to dra in – Mo a t b o tto m slo pe s a t 0.07% to o utle t – T ypic a l sto rm dra in pipe slo pe is 1% minimum Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

E xisting Co nditio ns a nd Cha lle ng e s Sub stantia l sto rm • dra in pipe ne two rk e xists Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

E xisting Co nditio ns a nd Cha lle ng e s Co mple te d study in 2008 to a sse ss a lte rna tive s to • re duc e flo o ding a lo ng the Mo a t o nly Alter native F looding 2008 Costs Impr ovement E xc a va te a nd 0.3 fe e t fo r up to $2.5 millio n wide n Mo at 10-ye ar sto rm Upg ra de No signific a nt <$1 millio n Me mo ria l Blvd impro ve me nt Culve rt ne a r E lle ry Rd Insta ll ne w No signific a nt $3.7 millio n c ulve rts a t Old impro ve me nt Be a c h Ro a d ne a r E lle ry Rd Install ne w 0.2 fe e t fo r up to $6.5 millio n sto rmwa te r 10-ye ar sto rm pump sta tio n Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

Pro po se d Study-Ob je c tive s E ng ine e ring • study to re duc e flo o ding a lo ng trunk sto rm se we r dra ining Whitwe ll Ave ne ig hb o rho o d F o c use d o n a re a • b e twe e n Bliss a nd E lle ry Ro a d Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

Pro po se d Study De ve lo p a lte rna tive s to re d uc e flo o ding in study a re a • – E va lua te pipe ne two rk impro ve me nts – Asse ss whe the r Mo a t impa c ts Whitwe ll Ave syste m • I f it do e s, de ve lo p ne w alte rnative s fo r the Mo at – Asse ss ho w future se a le ve l rise impa c ts Whitwe ll Ave syste m – E nsure tha t impro ve me nts do no t c a use mo re flo o ding up- o r do wnstre a m Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

Pro po se d Study E va lua te two sto rm sc e na rio s • – 12/ 24/ 15 sto rm a nd a “sta nda rd” 10-ye a r fre q ue nc y sto rm So urc e : Na tura l Re so urc e s Co nse rvatio n Se rvic e Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

Pro po se d Study Ca lc ula te ho w a lte rna tive s wo uld re duc e flo o ding fo r • tho se two e ve nts – Cha ng e s in de pth a nd dura tio n o f flo o ding Re c o mme nd pla n to re duc e flo o ding • – I nc lude b o th sho rt- a nd lo ng -te rm a lte rna tive s Pla n will no t e limina te a ll flo o ding • – Ce rta in sto rms will still c a use flo o ding Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

Pub lic Ob se rva tio ns a nd I nput Wa nt to b e tte r unde rsta nd a c tua l flo o ding • issue s Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

Ne xt Ste ps Ple a se se nd pho to s o f flo o ding to • kb a ke r@ fa ndo .c o m – I nc lude da te a nd time o f pho to a nd whe re pho to wa s ta ke n(a ddre ss o r inte rse c tio n) – We ha ve a lre a dy re c e ive d pho to s se nt to the City T his da ta will b e use d to b e tte r de ve lo p hydra ulic • mo d e l o f the dra ina g e syste m – Ne e d to se e de pth o f flo o ding in pho to s Surve y a nd site wa lk o n June 9 th • – Sta rt a t E lle ry a nd E ustis a t 8 a m Ne xt pub lic me e ting to re vie w re c o mme nda tio ns in • Se pte mb e r, 2016 Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a