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

Dra ina g e Inve stig atio n a nd F lo o d ing Ana lysis-Whitwe ll Ave nue Are a

Stakeholder Meeting

Dr ainage Investigation and F looding Analysis Whitwell Avenue Ar ea City Pr

• jec 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
• posed 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 Impr

• vement

2008 Costs

E xc a va te a nd wide n Mo at 0.3 fe e t fo r up to 10-ye ar sto rm $2.5 millio n Upg ra de Me mo ria l Blvd Culve rt No signific a nt impro ve me nt ne a r E lle ry Rd <$1 millio n Insta ll ne w c ulve rts a t Old Be a c h Ro a d No signific a nt impro ve me nt ne a r E lle ry Rd $3.7 millio n Install ne w sto rmwa te r pump sta tio n 0.2 fe e t fo r up to 10-ye ar sto rm $6.5 millio 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
• 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 9th

– 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