conservation development mtr trail
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Conservation Development
Lois Balin
Urban Wildlife Biologist
Texas Parks and Wildlife
The Conservation Development and Subdivision Design Process
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Most People Value the Natural World
Affordable housing and land conservation are notmutually exclusive
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Soils
Hydrology
Flora
Fauna
Urbanization Effects on Ecosystems
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Conservation developmentcan be applied to regional, county, municipal,
commercial, single family detached housing oreven high density apartment dwellings.
A triumph for developers, homeowners, and our natural
resources
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Benefits for:
Higher property and re-sale values Lower water and energy bills Permanent natural resource amenities
Improved air and water quality
Reduces heat island effect
Economically attractive to businesses
Lower costs and higher market and resale values Goals met with neutral or higher densities
Developers
Homeowners
Communities
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Ecological Benefits:
Protects uplands and floodplains Prevents soil erosion and decreases pollutants
Increases water recharge, nutrients andwildlife habitat
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What is Conservation Development?
Maintains local regions ecological integrity
Preserves best areas, develops in areas ofleast impact
Clustered development places open spaceinto permanent protection
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Conservation Development Planning Objective
EcologicalLand Stewardship Economical
Viable development
CulturalLivable communities
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The thought of what this placewill soon look like just gives me
the creeps.
The Far Side
Why Should You Care
About Conservation Development?
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1. Analysis of CurrentGrowth Practices
2. Protecting Natural Open Space Through Conservation Planning
- Identify and Map Primary Conservation Areas (PCAs) andSecondary Conservation Areas (SCAs)
- Use overlays to connect resources
Conservation Development Process
From Randall Arendts Conservation Design for Subdivisions
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3. Conservation Zoning - A Menu of Choices
- Calculate sites yield using traditional or conservation zoning
- Provide density/open space choices
4. 4-Step Conservation Subdivision Design
Conservation Development Process
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Current City LimitCurrent City Limit
ETJETJ
Regional ExampleRegional ExampleFuture of the City/Region is being planned
Protecting Open Space Through Conservation Planning
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Transportation, Existing Development, PCAs andAgriculturalTransportation, Existing Development, PCAs andAgricultural
Prime Agricultural Lands
Existing Development
ArcheologicalArcheological
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EcologicalEcological
Arroyos and FloodplainsArroyos and Floodplains
Desert ScrubDesert Scrub
Sand Scrub RemnantsSand Scrub Remnants
Desert GrasslandsDesert Grasslands
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Scenic ViewsScenic Views
HistoricHistoric
RecreationalRecreational
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CombineAll Categories
Open Space Map
CombineAll Categories
Open Space Map
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LinkagesLinkages
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Connected Network of
Resources and Linkages
Connected Network of
Resources and Linkages
Map of Areas to be Preserved in Future Development
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Facilitates
Movement
Facilitates
Movement
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Density
Placement
Density
Placement
HighHigh
MediumMedium
LowLow
How Conservation Development could Work
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Zoned for Overall Density of 2 Acre Lots
100 Acres = 50 lots
Prime Desert Habitat
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Fifty 2-Acre Large Lot Zoning Results
Extensive Fragmentation
Maintain 2 Acres, Access 2 Acres
No Common Good (Trails, etc.)
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Conservation Development
50 - 1/2 Acre Lots All with a Premium)
Minimal Fragmentation
Maintain 1/2 Acre, Access 75.5 Acres
Common Good (Trails, etc.)
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Development can occur withoutobliterating our open space network
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50 AcresArroyos (floodplain) Mostly Desert Scrub
Cultural Sites
Arroyo Desert
Scrub
Historic Sites Stone Wall
Floodplain
Protecting Open Space Through Conservation Planning
Base Map
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Arroyo Desert
Scrub
Historic Sites Stone Wall
Floodplain
Identify Primary Conservation
Areas (PCAs)
Arroyos
Floodplains Cultural Sites
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Identify Secondary
Conservation Areas (SCAs)
Stone Wall
Natural Desert Habitat Areas
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Arroyo Desert
Scrub
Historic Sites Stone Wall
Floodplain
Design Your Project
Determine Acreage of Buildable Land
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Arroyo Desert
Scrub
Historic Sites Stone Wall
Floodplain
Best Places to Build
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Pros:
Saves SCAs
High Density
Cons:
More Fragmentation
Numerous Arroyo Crossings No Common Amenities
25 homes on 2 acre lots
First Scenario 50 Acres
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Gazebo
Common
Open Space
Common
Open Space
Pros:
Avoids most PCAs and SCAs
1arroyo crossing Same density, less breakup
Access to ~ 44 acres
Low infrastructure cost
Cons:
Smaller lot sizes
25 homes on 1/4 ac lotsConservation Development
Second Scenario 50 Acres
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Site using traditionalzoning to calculatedensity yield
18 2-acre Lots
Randal Arendt
Conservation Zoning: A Menu of Choices
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Option 1:
Density Neutral
18 Lots
Standard is arequired 50%
Open Space
Conservation Zoning: A Menu of Choices
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Option 2:
25% Density Bonus 24 Lots
60% Open Space
Conservation Zoning: A Menu of Choices
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Option 3:
100% Density Bonus 36 Lots
70% Open Space
Conservation Zoning: A Menu of Choices
Dis-Incentives for Anything but Conservation Design
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Subdivision Design
Minimum of 50%Open Space
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32 Homes
Traditional Method of Subdivision Design
Densitydetermined on size
of entire lot
82 acres
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4- Step Conservation Subdivision Design
Randal Arendt
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Identify the Land to be Preserved
Randal ArendtSecondary Conservation Areas
Primary Conservation Areas
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Identify Development Area
Density determinedon size of buildableland
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Home site Placement
DensityNeutral!!DensityNeutral!!
Still 32Homes
Yet ALL Lots are Premium LotsRandal Arendt
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Add Lot Lines and Amenities
Maintain less, but access to MORE!!
Randal Arendt
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Dis-Incentives for Anything but Conservation Design
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Which subdivision would you rather live in?
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Guiding PrinciplesGuiding Principles
A thing is right when it tends to preserve the integrity,
stability and beauty of the biotic community. It is wrongwhen it tends otherwise.
-Aldo Leopold
A thing is right when it tends to preserve the integrity,
stability and beauty of the biotic community. It is wrongwhen it tends otherwise.
-Aldo Leopold
For more information please contact:
Lois Balin, Urban Wildlife Biologist
Texas Parks and Wildlife
(915) 774-9603