2. EPA_WPP_Flood_Hazard_Mitigation - David Hunter City of Denton
Watershed Protection
Water Quality/Quantity
Planning Efforts
Denton
• DFW Metroplex
• Population N140,000 Anwha, Ask
• Two Major Universities
• Known for Jazz Music Program
• Progressive community
• Located in the Trinity River Watershed
• Elm Fork of the Trinity Sub- Basin
i
Denton 's '*
Watershed
. . .
Creez
• The City's watershed is a 3 ' -
combination of four sub-
basins that area part of the
greater Trinity River
Watershed.
PRO
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City of Denton has water
rights in Lewisville and Ray
Roberts Lake along with the
City of Dallas.
#V . The ChaIlle e
• Increased growth in the metroplex
• Stresses on environmental resources
• Increased flood risk
• Shrinking/changing economic/financial
resources
• Increased need for local/regional
collaboration
Hickory Cree nalysis :
Land Use Cl., h
ges
Water Water
2008 1 2012
Urban Agricultural` Agriculture},,
24% 31% Urban 27%
3 Y,"O
f' Fores
Range
Forest . °�0
37% Range
7% .
31%
- - -- Water - - Water
2017 1 2020
Agricultural., AgriCLlltur
22% 20/o
Urban Forest
46°") Urban 5%
Forest 51%
r 5% i
Range ', Range
26% 23%
ii
Look'ing
91 fui t e
Over 1 million expected in Denton County by
2030 .
Protection of natural assets for • •
growth an • quality of life
City of Denton expected to Double by 2040
. fir• -� -j
h II nof floCae es
• Increased impervious pavement
• Greater intensity and frequency of flood events (crosses
political boundaries)
• Communication between City of Denton departments
- Stormwater Management/Water Resources
- Public Works
-Urban Planning
- Parks Department Or •,,,
- Emergency Management I *
April 24, 2007
Storm event
i
Construction Site-
1-5 acres
• • >5 acres
Continued Growth
— Denton/Denton _
County J
w
_1 �_ � -N�� � • � J1teS
Giot`►E�:, �'�ng r�ih�c s
City of Denton Water Quali onitoring Program
84 sites sampled monthly �' l� _ i;
18 Years of data ME
1 �
1 1
r H N
h-
if./
-
r, CODGIS-GISADMScreeningStations CODGIS.GISADM.Regulatory
SDE.CountyRoads CLASS
SIDE Streams DIVISION ONE -
■ DIVISION
• • Clear Creek Reference Ste
- .
arl t A..
. .a t,.,r n•iinS�j(n .,, •�I_r^ — n _ - Cooper CreekatNTrinity
06
\ ` �f' Pecan Creek upstream of
_ PCWRP discharge -
Pecan Creek downstream of -
i r PCWRP discharge(EMPACT grant)
Hickory Creek at lift station near
a
Old Alton
't
- Lewisville Lake platrorm
- - � -• - - ^' •* near intake
Hickory Creek Watershe rotection Plan
I r
( Project : 2005-2008i/12 09-2013 )
• Modeled water quality impacts from development
• Constructed : : ( Economic
Modelling)
• Established strong stakeholder relationships '
irl �. .e�.t °•.
re.s r..roen�.rr.�� � � I MfM4Y/M wrt� 'p• '
....��...��.per•.wr- 1" �voss►wGs p•• •'
. Phosphorous tonslyr •. '
• 0 00898= 0 050000 •t
• 0 OS0001 0 060000 _
O ••1 •• •
• '
•
Denton County •••
• Bridge Facility
319 Grant W Data
Allow •
evaluate water
quality changesHickory Creek at Country Club Road
respect to different Total Phosphorus (TP)
storm events Load Duration Curve (n=46) High Flows
Screening Level = 0.69mg/L Moist Conditions
Updated 12/02/2018 Mid-Range Conditions
100000 Dry Conditions
Low Flows
10000
Screening Level-TP
■
1000 ■- LOADEST-TP
Y 100
O —
J
> 10 —
O
CL
O I1;1
s 0.1
0
� 0.01
0.001
0.0001
0 10 20 30 40 50 60 70 80 90 100
Percentage of Days Load Exceeded
Denton County za 'tigation Plan
(20
• Collaborative Regional Effort Coordinated by North
Central Texas Council of Governments
• Identifies various Risk and Vulnerabilities
• Results of this effort to be incorporated into the City of
Denton's Hazard Mitigation Plan
• Reimbursable by FEMA funds
• Create opportunities to increase resilience
Hazard Mitigation Action Plan
Denton County.Texas
ni
ADenton County Gr belt flan
Adopted by Dento County
2017/COD 2019)
• Preserve greenbelts
and related natural
areas
• Identify strategic
areas for greenbelt �y
T -
corridors
• Advocate for multi- �
use greenbelts
• Provides a strategy �' J
"tool box" � '�
CitY of Denton Strat is Elements
• Complete and Approved Watershed Protection Plan
( No stream-impairment)
• Complete and Approved Hazard Mitigation Plan
(integrated with Denton County)
• Partnership with Upper Trinity Regional Water
District/Upper Trinity Conservation Trust
• Environmentally Sensitive Assessment Area Policy
• Regional Partnerships
� Environme nt ality
Emergency Man m e n
• Water Quality — Water Quantity Concerns
• Not usually grouped together in organizational
framework
• Not always funded or managed together
• Consider: Organizational / Financial / Regulatory
• Temporal and Spatial — Flooding events big and fast
• Water Quality - big or small and fast or slow
• Mitigation , Response, Recovery and Preparedness
Challenges and op ortunities
• Challenges:
Is Limited Funding
to e � .
W �+- PBfn P:,.,. irtykw,w.ra a mtlutle Pam% :� c
a engagement o ltac&
• Regulatory challenges .. �hQ;o,�id� g . � � } g, -
g y g t �1 thane vernmentneed u�� ���„� wicked
Pnt 'solmions
�hPiroach scommunily =issub g moires
ee J n ekens families
• Rapid Development is Fast" �,°��boun"d�,Ps.
� probt6ffl
_ s
• Opportunities:
• Denton has "low hanging fruit"
M.
• Completed and Approved Plans
• Existing Stakeholder/Partner Network r
• Data sets / Literature
� Thanks very muchif your time
David H . Hunter
Rvo F
David7. hunter ci enton . com
Ok
atershed@citvofdenton . com
City of Denton Waters ed Protection
( Facebook)