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Aurora, CO: A Case Study in Land Use Planning, Water ... Whitney Aurora Water...Land Use Planning,...
Transcript of Aurora, CO: A Case Study in Land Use Planning, Water ... Whitney Aurora Water...Land Use Planning,...
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Aurora, CO: A Case Study in Land Use Planning, Water Efficiency and Collaboration WRRC, September 20, 2016 Lyle Whitney Water Conservation Supervisor
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Outline
• History of collaboration • Water use reduction • Other benefits realized
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History 2003: Significant Landscape Code changes 2007: Water Conservation Management Plan 2009: City of Aurora Comprehensive Plan 2011: Land Use Assessment Model (LUAM) 2014: Integrated Water Master Plan (IWMP) 2015: Water Conservation Management Plan 2015: Population and Employment Allocation Tool (PEAT) 2015: Z-zone Tap Fee Structure and Incentives 2016: Evaluation of new Landscape Code changes
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2003 Landscape Code Changes
• Response to 2002 drought
• Pre-2003 code did not address water concerns
• 2003 code limited turf and promoted xeriscape – 40-50% turf maximum in front yards – 45% turf maximum in back yards
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Pre-2003 Lots…
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Post-2003 Lots…
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Water Consumption Since Drought
200,000
220,000
240,000
260,000
280,000
300,000
320,000
340,000
360,000
100
120
140
160
180
200
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
Auro
ra P
opul
atio
n
Aver
age
Annu
al G
allo
ns p
er C
apita
per
Day
(gpc
d)
GPCD Population
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Z-zone Tap Fee (Irrigation)
• Z-Zone Tap Fee (Irrigation Meters) – 3 year establishment period – Water allocations based on landscape
Revised 2014 Tap Fees
High-Water Use (HWU) $2.75/sf
Low-Water Use (LWU) $1.47/sf
No Water Use (Z-Zone) $0.00/sf No supplemental water
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Predicted Water Savings
Zone Pre- Z-Zone Option
Post- Z-Zone Option
Post- Z-Zone
SF
High Water
47% 17.5% 415,305
Low Water 47% 40.1% 953,744
No Water 6% 42.4% 1,009,164
Potential Savings = 9,430,638 gallons/year
7 out of 8 developments have opted for Z-zone
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Incentives (residential)
• Front Yard xeriscape tap fee credit – 100% xeriscape in front yard – $1,000 credit
• Estate Lot Variance – ¾ acre minimum “developed” – Tap fee based on water need and landscape – Recovery fee component
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It’s already being practiced
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Proposed Changes
1. Reduction of turf requirements 1. Disallow turf in streetscapes (arterial, common
areas) 2. Change turf limitations in residential
development 2. Simpler xeriscape requirements
1. Turf and xeric options have same standards 3. Streetscapes considered part of front lawn 4. Plant quantity requirement standardized
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Turf Option Changes
Current • Turf:
– Small: 40% - 50% – Standard: 30% - 40% – Large: 25% - 40% – Estate: 25% - 40%
• Shrubs: – Small – 8 – Standard – 16 – Large – 26 – Estate – 36
• No hardscape required
Proposed • Turf:
– Min: 400 SF – Max: 40% or 1,000 SF (all
sizes) • Shrubs:
– 0.025 / SF – SF = (Landscaped Area –
Turf Area) • Hardscape required (to
match xeric requirements)
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Water Savings with Turf Adjustments
Residential Water Savings Potential 2016 -2020
Turf SF % Turf Reduction H2O Savings (AF) % Water Savings
Residential FY*: 2,043,208 43% 60 31%
Non-Residential Water Savings Potential 2016 - 2020
Arterials**: 721,057 100% 89 45%
* Front yard turf option: Minimum = 400 square feet, Maximum = 40% of front yard area or 1,000 square feet, whichever comes first
** Streetscapes that are along arterials and commonly owned and maintained by any non-single family residential customers
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Standard Lot – Current Turf Requirements
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Standard Lot – New Turf Requirements
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Away from…
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And towards…
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Realized Benefits
• Water consumption reduction • Open collaborative environment • Streamlined processes • Easier for developers
– Pre-application option – Fewer misinformed approvals – Incentives to reduce costs – Promotes smart, more sustainable development