0
Colorado’s First Solar (and TREE!)
Friendly Community
January 8, 2013
Jessica Scott, Sustainability Strategist
Office of S...
Denver Designated As Gold Level
Solar Friendly Community (1275 pts)
How Did We Do It?
Denver’s Score At A Glance
• Provide Checklists (200 pts)
• Solar Coordinator (50 pts)
• Website (25 pts)
Step 1
(275/275)
Denver’s Score At A Glance
• Use Standard Form (50 pts)
• One point of contact (25 pts)
• Authorize electronic
communicati...
Denver’s Score At A Glance
• Electronic Submittal (150)—
in process, Accela launch
slightly delayed
Step 3
(150/150)
Denver’s Score At A Glance
• Same-day, electronic, or OTC
permits (100 pts)
Step 4
(150/150)
Denver’s Score At A Glance
• Cap residential permit fees at
$50 for standard systems
(100 pts)
• P.E. Stamp exemption for
...
Denver’s Score At A Glance
• Accept NABCEP/no local req.
(25 pts)
• Post Inspection Checklist
(25 pts)
• Post Changes to C...
Denver’s Score At A Glance
• < Two hr lnspection Window
(50 pts)
• One Inspection (75 pts)
• Allow Affidavit (15 pts)
Step...
Denver’s Score At A Glance
• Work with Fire Officials (50 pts)
• Encourage Community Solar (25
pts)
• Adopt Balanced Writt...
Denver’s Score At A Glance
• Employee group discount (50 pts)
• Low-interest solar loan for Denver
Energy Challenge partic...
Denver’s Score At A Glance
• Denver Regional Solar Map (10 pts)
• Encourage solar development as
stated goal for community...
What is Denver Currently Working On?
• In process of launching online permitting (Accela)
• Launching 2nd
round of Solar G...
Trees and Solar Collectors Working Together
• What is the urban forest?
• Urban forest benefits
• Governance
• Solar confl...
The Urban Forest
• A collection of woody
vegetation within a city or
town
• Impacts every parcel in a
city
• Essential to ...
Urban Forest Benefits
Enhanced Quality of Life
• Promotes physical
health and mental
well being
• Walkablitiy
• Reduced st...
Urban Forest Benefits
Property value
A large healthy tree can increase a property’s value by
1% to 4%
Urban Forest Benefits
Environmental Service
• Clean air
• Clean water
• CO2 storage and sequestration
Urban Forest Benefits
Urban Heat Island
Urban Forest Benefits
Energy Efficiency
• Evergreens buffer cold
winter winds reducing heat
heat loss
• Deciduous trees
pl...
Metro Denver Urban Forest
• 16.4% canopy cover (4.5% in Erie to 37.4% in Cherry Hill Village)
• 9.6 million trees
• 4.8 tr...
Ordinance, Rules & Regulations
• PROW are protected
- belong to the City
• Private property
- no jurisdiction
• Licensing
...
Solar Conflict
• Current
• NREL study – only 20-25% of residential roofs are
suitable for solar*
• Due to shading and roof...
Solar Conflict
• Future
• Trees are dynamic
• Lack of knowledge:
• Growth rate
• Size
• Shape
• Height control techniques ...
What Is A Relevant Conflict?
What Is A Relevant Conflict?
What Is A Relevant Conflict?
Trees As Solar Conflicts
• Tree Shade Instead of Adequate Insulation
• Millions of $ in savings in every city on earth
• I...
Solution Sets
• Current
• Solar-friendly Arborists
• Solar Gardens
• Future
• Solar-safe Zones
• Site Planning
• Neighborh...
Current Solutions
• International Society of Arborists (ISA) –Certified work
• Solar-friendly Analysis, Plant Care and Sel...
Future Solutions
• The following can be voluntary, covenant, agreement,
ordinance, recommendation.
• Solutions change acro...
Parcel Scale Solutions
• Solar Access Zones with species selection by location.
Parcel Scale Solutions
• Solar Access Zones with species selection by location.
Street Scale Solution
• Street Tree Species Selection by Defined Side of Street
• Covenant, Ordinance
Street Scale Solution
• Street Tree Size at Obstruction Only After Many Years
Recap: Solutions
• Current Conflicts:
• ISA-Certified Arborist :: Solar-Friendly
• Future Conflicts:
• Analysis needed for...
Solution
• Get an arborist
• Educate the home owner
Questions?
Sara Davis, Mile High Million Program Manager
Department of Parks and Recreation
Sara.davis@denvergov.org
Jessi...
Denver: How to Become Both Solar and Tree-Friendly
Denver: How to Become Both Solar and Tree-Friendly
Denver: How to Become Both Solar and Tree-Friendly
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Denver: How to Become Both Solar and Tree-Friendly

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The City of Denver describes how it has become "solar friendly" using the "12 Best Practices of Solar Friendly Communities." The city also has policies to protect its urban forest and preserve its valuable environmental services. Denver is balancing both objectives.

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Transcript of "Denver: How to Become Both Solar and Tree-Friendly"

  1. 1. Colorado’s First Solar (and TREE!) Friendly Community January 8, 2013 Jessica Scott, Sustainability Strategist Office of Sustainability Office of Mayor Michael Hancock
  2. 2. Denver Designated As Gold Level Solar Friendly Community (1275 pts)
  3. 3. How Did We Do It?
  4. 4. Denver’s Score At A Glance • Provide Checklists (200 pts) • Solar Coordinator (50 pts) • Website (25 pts) Step 1 (275/275)
  5. 5. Denver’s Score At A Glance • Use Standard Form (50 pts) • One point of contact (25 pts) • Authorize electronic communication (25 pts) Step 2 (100/275)
  6. 6. Denver’s Score At A Glance • Electronic Submittal (150)— in process, Accela launch slightly delayed Step 3 (150/150)
  7. 7. Denver’s Score At A Glance • Same-day, electronic, or OTC permits (100 pts) Step 4 (150/150)
  8. 8. Denver’s Score At A Glance • Cap residential permit fees at $50 for standard systems (100 pts) • P.E. Stamp exemption for standard systems (50 pts) Step 5 (150/150)
  9. 9. Denver’s Score At A Glance • Accept NABCEP/no local req. (25 pts) • Post Inspection Checklist (25 pts) • Post Changes to Code (10 pts) Step 6 (25/25) Step 7 (35/50)
  10. 10. Denver’s Score At A Glance • < Two hr lnspection Window (50 pts) • One Inspection (75 pts) • Allow Affidavit (15 pts) Step 8 (50/75) Step 9 (90/100)
  11. 11. Denver’s Score At A Glance • Work with Fire Officials (50 pts) • Encourage Community Solar (25 pts) • Adopt Balanced Written Goals (25 pts) Step 10 (100/150)
  12. 12. Denver’s Score At A Glance • Employee group discount (50 pts) • Low-interest solar loan for Denver Energy Challenge participants that achieve 15% energy savings (50 pts) • Educational Solar Events (25 pts) Step 11 (125/125)
  13. 13. Denver’s Score At A Glance • Denver Regional Solar Map (10 pts) • Encourage solar development as stated goal for community (15 pts) • Running tabulation of solar projects (50 pts) Step 12 (75/75)
  14. 14. What is Denver Currently Working On? • In process of launching online permitting (Accela) • Launching 2nd round of Solar Group Discount (contact Jessica if your municipality or company is interested in participating) • Solar Friendly (but still Tree Friendly!) Communities
  15. 15. Trees and Solar Collectors Working Together • What is the urban forest? • Urban forest benefits • Governance • Solar conflicts • Solutions
  16. 16. The Urban Forest • A collection of woody vegetation within a city or town • Impacts every parcel in a city • Essential to the well being of city residents • Provides individual and community benefits
  17. 17. Urban Forest Benefits Enhanced Quality of Life • Promotes physical health and mental well being • Walkablitiy • Reduced stress • Reduced hospital stay length
  18. 18. Urban Forest Benefits Property value A large healthy tree can increase a property’s value by 1% to 4%
  19. 19. Urban Forest Benefits Environmental Service • Clean air • Clean water • CO2 storage and sequestration
  20. 20. Urban Forest Benefits Urban Heat Island
  21. 21. Urban Forest Benefits Energy Efficiency • Evergreens buffer cold winter winds reducing heat heat loss • Deciduous trees planted on the east and west block summer sun and reduce cooling needs but allow for winter heating • Shading to the south by branch structures negatively affects winter heating
  22. 22. Metro Denver Urban Forest • 16.4% canopy cover (4.5% in Erie to 37.4% in Cherry Hill Village) • 9.6 million trees • 4.8 trees per capita • Denver canopy cover is 19.7% • 2.2 million trees • 3.7 trees per capita • 182,000 MWh saved through cooling each year ($21.8 million) • 997 MWH per day during the cooling season
  23. 23. Ordinance, Rules & Regulations • PROW are protected - belong to the City • Private property - no jurisdiction • Licensing - insurance required - no cuts over 4” - no topping - license revocation
  24. 24. Solar Conflict • Current • NREL study – only 20-25% of residential roofs are suitable for solar* • Due to shading and roof orientation • Trees aren't static * Denholm, P. and Margolis, R.M. 2008. Supply Curves for Rooftop Solar PV-Generated Electricity for the United States. NREL/TP-6A0-44073, National Renewable Energy Laboratory, Golden, CO, USA.
  25. 25. Solar Conflict • Future • Trees are dynamic • Lack of knowledge: • Growth rate • Size • Shape • Height control techniques (solar friendly pruning)
  26. 26. What Is A Relevant Conflict?
  27. 27. What Is A Relevant Conflict?
  28. 28. What Is A Relevant Conflict?
  29. 29. Trees As Solar Conflicts • Tree Shade Instead of Adequate Insulation • Millions of $ in savings in every city on earth • Infrastructure Placement Paradigm
  30. 30. Solution Sets • Current • Solar-friendly Arborists • Solar Gardens • Future • Solar-safe Zones • Site Planning • Neighborhood Planning • Regional Planning
  31. 31. Current Solutions • International Society of Arborists (ISA) –Certified work • Solar-friendly Analysis, Plant Care and Selection • Cost, repeat visits amortize into total cost of array • The urban forest is a managed landscape
  32. 32. Future Solutions • The following can be voluntary, covenant, agreement, ordinance, recommendation. • Solutions change across scales. • Trees can’t be pruned like a hedge, so species selection is important. • Solar Safe Zone or Solar Access Zone is fundamental unit of outcome (parcel scale, neighborhood scale, regional scale, city scale).
  33. 33. Parcel Scale Solutions • Solar Access Zones with species selection by location.
  34. 34. Parcel Scale Solutions • Solar Access Zones with species selection by location.
  35. 35. Street Scale Solution • Street Tree Species Selection by Defined Side of Street • Covenant, Ordinance
  36. 36. Street Scale Solution • Street Tree Size at Obstruction Only After Many Years
  37. 37. Recap: Solutions • Current Conflicts: • ISA-Certified Arborist :: Solar-Friendly • Future Conflicts: • Analysis needed for time • Species selection and restrictions in space • Ordinances: parcel, street, neighborhood level • Most People Forget Trees are Dynamic, PV is Static • Trees and Solar are Good Partners
  38. 38. Solution • Get an arborist • Educate the home owner
  39. 39. Questions? Sara Davis, Mile High Million Program Manager Department of Parks and Recreation Sara.davis@denvergov.org Jessica Scott, Sustainability Strategist Office of Sustainability Jessica.scott@denvergov.org Dan Staley DCS Consulting Green Infrastructure Consultant Staley.dan@gmail.con
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