Comprehensive Creek Planning Initiative Boulder County Susta ining - - PowerPoint PPT Presentation

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Comprehensive Creek Planning Initiative Boulder County Susta ining - - PowerPoint PPT Presentation

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Comprehensive Creek Planning Initiative Boulder County Susta ining Co lo ra do Wa te rshe ds Co nfe re nc e Oc to b e r 8, 2014 Watershed Recovery Future Creek Long Term Immediate Emergency Projects Vision Threat Response Assessment and

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SLIDE 1

Comprehensive Creek Planning Initiative Boulder County

Susta ining Co lo ra do Wa te rshe ds Co nfe re nc e Oc to b e r 8, 2014

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SLIDE 2

Watershed Recovery

Future Creek Projects Funding and Implementation Emergency Response Immediate Threat Assessment and Mitigation Long‐Term Vision Watershed Master Plans

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SLIDE 3

Boulder County Watersheds

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SLIDE 4

Roads and Bridge s

  • 10 c o unty b ridg e s we re se ve re ly da ma g e d
  • r de stro ye d
  • 118 priva te c ro ssing s (b ridg e s o r c ulve rts)

we re da ma g e d o r de stro ye d

  • 140 mile s o f c o unty ro a ds we re da ma g e d o r

de stro ye d

Emergency Response

Immediate Threat and Damage Assessment and Mitigation

Total Estimated Cost for Public Road and Bridges:

$128,179,680

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SLIDE 5

Wate r ways

  • Alig nme nt o f the c re e ks c ha ng e d in ma ny

lo c a tio ns—so me time s dra stic a lly

  • Ma ny po nds we re b re a c he d
  • L

a rg e a mo unts o f se dime nt de po site d in c re e ks

  • Ba nk e ro sio n a nd insta b ility
  • E

xte nsive da ma g e in c re e ks o n priva te la nds

Emergency Response

Immediate Threat and Damage Assessment and Mitigation

Total Estimated Cost for Waterways Projects on Public Lands:

$29,279,435

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SLIDE 6

Compr e he nsive Cr e e k Planning Initiative

  • I

nitia te d to e nsure c o unty-wide vie w o f c re e k re c o ve ry a nd re sto ra tio n

  • Be g a n with c o mmunity me e ting s

to ide ntify ne e ds

  • Mo ve d to hig h-ha za rd de b ris

re mo va l a nd mitig a tio n pro je c ts

  • Pre pa re d fo r a nd tra nsitio ne d to

wa te rshe d-le ve l ma ste r pla nning pro c e ss

Emergency Response

Immediate Threat and Damage Assessment and Mitigation

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SLIDE 7

Community Engagement

  • Ove r 650 pa rtic ipa nts

Emergency Response

Immediate Threat and Damage Assessment and Mitigation

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SLIDE 8

Information Clearinghouse

Emergency Response

Immediate Threat and Damage Assessment and Mitigation

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SLIDE 9

County‐wide Evaluation

  • 208 site s we re ide ntifie d re q uiring fo llo w-

up a nd re c o ve ry me a sure s.

Emergency Response

Immediate Threat and Damage Assessment and Mitigation

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SLIDE 10

High Hazar d De br is Re moval

Emergency Response

Immediate Threat and Damage Assessment and Mitigation

Total Estimated Cost for High Hazard Projects:

$2,869,201

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SLIDE 11

Boulde r County Maste r Plans Emergency Response

Long‐Term Vision Watershed Master Plans

Activity

  • St. Vrain

Creek Left Hand Creek Fourmile Creek

Coalition Convened Community Process Initiated Ecological Assessment Geomorphic Assessment Hydraulic Model

October

Flood Hazard Areas Identified

October October October

Draft Alternatives

October October

Draft Plan

October October October

Feedback on Draft Plan

October October November

Plan Finalized

November November December

Complete N/A Upcoming

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SLIDE 12
  • St. Vr

ain Cr e e k Emergency Response

Long‐Term Vision Watershed Master Plans

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SLIDE 13
  • St. Vr

ain Cr e e k Coalition

  • 8 a g e nc ie s
  • Me e ting twic e pe r mo nth to g uide

de ve lo pme nt o f pla n

Community E ngage me nt

  • 2 kic k-o ff me e ting s in June - 200

pa rtic ipa nts

  • I

ndividua l a nd ne ig hb o rho o d me e ting s thro ug ho ut study

  • 4 re a c h-spe c ific c o mmunity wo rksho ps

fo r fe e db a c k o n a lte rna tive s- 140 pa rtic ipa nts

  • F

ina l wo rksho p in No ve mb e r to re le a se pla n Emergency Response

Long‐Term Vision Watershed Master Plans

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SLIDE 14
  • St. Vrain Creek

Ecological Assessment

E va lua tio n o f the o ve ra ll c o nditio n o f stre a ms, ripa ria n zo ne s, a nd in-stre a m ha b ita t

Main ste m= F air to Good Nor th St. Vr ain= F air to Good South St. Vr ain= Poor to E xc e lle nt

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SLIDE 15
  • St. Vrain Creek Ecological Assessment

Poor Excellent Recommendations: Consider opportunities for improved meanders, habitat, vegetation, etc.; need to create more complexity within the channel No further management recommended

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SLIDE 16
  • St. Vrain Creek Geomorphic Analysis

Rapid Ge omor phic Asse ssme nt

  • De fine po st-flo o d g e o mo rphic c o nditio ns in the St.

Vra in syste m

  • Supple me nt a n o ve ra ll unde rsta nding o f the

dyna mic s o f the St Vra in Cre e k

  • Assist with fo c using o n g e o mo rphic a lly a ppro pria te

flo o d risk re duc tio n a nd re sto ra tio n stra te g ie s

Channe l Migr ation Zone Mapping

  • A c ha nne l mig ra tio n zo ne (CMZ) re fe rs to the a re a

a stre a m ha s o c c upie d in re c e nt histo ry

  • Sho ws whe re a stre a m ma y mig ra te thro ug h a g a in
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SLIDE 17
  • St. Vrain Creek Geomorphic Assessment

Reference Stream Type C4 Existing Stream Type C4 Reference Bed Form Riffle‐pool Existing Bed form Plane bed Departure Type Bed form change due to straightening. Channel Evolution Stage II‐III Channel Processes Reach has been historically straightened and channel adjustments are limited due to

  • armoring. Significant overbank flow

and aggradation occurred during the September 2013 flood but post flood dredging and berming largely returned the channel to its pre‐flood

  • location. The bed lacks well‐defined

riffle‐pool features and is predominately a transport reach during most events. Sediment Regime Unconfined Source & Transport

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SLIDE 18
  • St. Vrain Creek

Channel Migration Zone Map

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SLIDE 19
  • St. Vrain Watershed Alternatives

Alternatives

  • Split channel
  • Channel realignment
  • Minor channel stabilization
  • 100‐Year flood control

channel

  • 100‐Year flood control

channel with low flow channel Alternatives (cont.)

  • Site‐specific projects
  • Stream restoration
  • Infrastructure

improvements only

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SLIDE 20

L e ft Hand Cr e e k Emergency Response

Long‐Term Vision Watershed Master Plans

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SLIDE 21

L e ft Hand Cr e e k Coalition

  • Ove r 20 a g e nc ie s, c o mmunity
  • rg a niza tio ns, wa te r inte re sts
  • Me e ting twic e pe r mo nth to g uide

de ve lo pme nt o f pla n

Community E ngage me nt

  • 2 K

ic k-o ff me e ting s in July/ Aug ust- 150 Pa rtic ipa nts

  • Me e ting s with individua ls a nd

ne ig hb o rho o ds while in the fie ld

  • 2 a dditio na l c o mmunity me e ting s in

Oc to b e r fo r dra ft pla n fe e db a c k

Emergency Response

Long‐Term Vision Watershed Master Plans

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SLIDE 22

Left Hand Creek Ecological Assessment

E va lua tio n o f the o ve ra ll c o nditio n o f stre a ms, ripa ria n zo ne s, a nd in-stre a m ha b ita t.

L

  • we r

L e ft Hand=Poor to F air Uppe r L e ft Hand=F air to Good

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SLIDE 23

Uppe r L e ft Ha nd Cre e k

  • Ge o mo rphic ha za rds

a re a re sult o f:

  • de b ris flo ws, ja ms
  • c ha nne l a vulsio n a nd

e xpa nsio n

  • Ha za rds c o nsist o f:
  • de stro ye d b a nks
  • unsta b le pe rc he d c ha nne ls
  • b o ulde r b e rms
  • e xte nsive flo o dpla in

de po sitio n

Left Hand Creek Geomorphic Assessment

L

  • we r L

e ft Ha nd Cre e k

  • Ge o mo rphic ha za rds a re

the re sult o f:

  • ra pid a g g ra da tio n
  • a vulsio n
  • e xpa nsio n
  • flo o dpla in de po sitio n
  • Ha za rds c o nsist o f:
  • unsta b le he a dc uts
  • b a nk fa ilure
  • de po sitio na l fe a ture s suc h a s

se dime nt slug s a nd b a rs

Ge o mo rphic ha za rds in the L e ft Ha nd Cre e k wa te rshe d a re e xte nsive , b ut a ppe a r q uite diffe re nt in the uppe r a nd lo we r wa te rshe ds. Stra te g ie s to a ddre ss the se risks invo lve b a nk, c ha nne l, a nd flo o dpla in sta b iliza tio n. E ne rg y dissipa ting fe a ture s a re pro po se d fo r hig he r e ne rg y re a c he s, while flo w a c c e le ra tio n in lo we r g ra die nt re a c he s will b e e nc o ura g e d to pro mo te se dime nt tra nspo rt a nd the e sta b lishme nt o f a lo w-flo w c ha nne l.

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SLIDE 24

Left Hand Creek Geomorphic Assessment

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SLIDE 25

F

  • ur

mile Cr e e k Emergency Response

Long‐Term Vision Watershed Master Plans

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SLIDE 26

F

  • ur

mile Cr e e k Coalition

  • Co o rdina te d with the Bo ulde r Cre e k

Wa te rshe d Co a litio n with UDF CD a nd

  • the r c o mmunitie s

Community E ngage me nt

  • K

ic k-o ff me e ting in Se pte mb e r- o ve r 50 Pa rtic ipa nts

  • Me e ting s with individua ls a nd

ne ig hb o rho o ds while in the fie ld

  • 2 a dditio na l c o mmunity me e ting s in

No ve mb e r

Emergency Response

Long‐Term Vision Watershed Master Plans

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SLIDE 27

Fourmile Creek Modeling

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SLIDE 28

Fourmile Creek Modeling

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SLIDE 29

L

  • we r

Boulde r Cr e e k Emergency Response

Long‐Term Vision Watershed Master Plans

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SLIDE 30

L

  • we r

Boulde r Cr e e k

  • F

unding a g re e me nt de ve lo pe d with Urb a n Dra ina g e a nd F lo o d Co ntro l Distric t (UDF CD)

  • Co a ltio n pa rtne rs inc lude c ity o f

Bo ulde r, c ity o f L

  • ng mo nt, Bo ulde r

Co unty

  • Re q ue st fo r Pro po sa ls (RF

P) re le a se d

  • Co nsulta nt se le c tio n b y e nd o f

Oc to b e r

  • Co o rdina te d with the F
  • urmile Cre e k

study, We ld Co unty c o mmunitie s, St. Vra in ma ste r pla n

Emergency Response

Long‐Term Vision Watershed Master Plans

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SLIDE 31

E nabling F lood Re c ove r y thr

  • ugh

Wate r she d Planning

  • Par

tne r ships

  • Co a litio n pa rtne rs
  • Co mmunity me mb e rs & la ndo wne rs
  • Sta ke ho lde r inte re sts
  • Re sour

c e s

  • Co unty: Sta ffing a nd funding
  • Sta te : Guida nc e a nd funding
  • CWCB Ma ste r Pla n Gra nt
  • CDBG-DR Pla nning Gra nt
  • CWCB Stre a m Re sto ra tio n Gra nts

*F

unding ne e de d fo r pro je c t imple me ntatio n, inc luding lo c al matc h

Emergency Response

Long‐Term Recovery

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SLIDE 32

Partnerships

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SLIDE 33

Post Maste r Plan Pr e par ations

  • I

nitia l c o nve rsa tio ns with c urre nt ma ste r pla n c o a litio ns a b o ut the future

  • Me e ting with la ndo wne rs,

c o mmunity me mb e rs, a nd sta ke ho lde rs to disc uss pro je c t imple me nta tio n, c o lle c t fe e db a c k, a nd c o ntinue invo lve me nt

  • Re vie wing o the r mo de ls
  • Go a l to e sta b lish o rg a niza tio na l

struc ture s b y e nd o f ye a r

Emergency Response

Long‐Term Recovery

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SLIDE 34

Post Maste r Plan Pr e par ations

Emergency Response

Long‐Term Recovery

Coalition F e e dbac k

  • Wa te rshe d-le ve l c o o rdina tio n va lua b le
  • Re c o g nize impo rta nc e o f ha ving
  • rg a niza tio na l c a pa c ity
  • Re ly o n o rg a niza tio ns tha t a re a lre a dy in

pla c e , c a pa c ity tha t e xists

  • F
  • c us o n flo o d re sto ra tio n a nd re c o ve ry,

pub lic pe rc e ive s a s slo w

  • F

unding ne e de d fo r pro je c t imple me nta tio n, q uic kly fo llo wing pla n c o mple tio n

L andowne r and Stake holde r F e e dbac k

  • Re side nt pa rtic ipa tio n in the c o a litio n a nd

pro je c t imple me nta tio n is c ritic a l

  • K

e e p a wa te rshe d-le ve l vie w, with sub - c o mmitte e s to a ddre ss lo c a l issue s

  • I

nc lude vo lunte e r o rg a niza tio ns

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SLIDE 35

Emergency Response

Long‐Term Recovery

Benefits Interdependence Clarity Resources Inclusion

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SLIDE 36

Julie Mc K a y Pho ne : 720-564-2662 E ma il: jmc ka y@ b o ulde rc o unty.o rg We b site : www.Bo ulde rCo untyCre e kPla n.o rg