Strategic partnerships between organizations are collaborating on regional planning, urban infrastructure investments, and building a sustainable city in the Treasure Valley region. These partnerships use tools like UTC assessments, stormwater modeling, and design approaches to maximize community support and manage challenges like downtown revitalization. Recent projects implemented green stormwater infrastructure, planted over 100 trees using innovative Silva Cell technology, and renovated streets and plazas to manage stormwater and increase tree canopy.

2. Sustained Collaboration
Regional
Planning
• Strategic partnerships create effective change
• Regional UTC Assessment & planning tools
• Treasure Valley Canopy Network (Lance)
Urban
Infrastructure
Investment
• Strategic stormwater modeling drives Green
Stormwater Infrastructure (GSI)
• Ecosystem Sciences (Tim)
Building a
Sustainable
City
• Design & implementation approaches maximize
community buy-in
• DeepRoot (Shawn)

4. Revitalizing a City
 2012 – 2013: 8th & Main
 2013 TV UTC Assessment
 City Streetscapes
 Healthy Trees
 Stormwater Tools
 2015 Community Forestry
Management Plan
 2015 – current: Boise Grove
 Strategic Partnerships
solving complex challenges
of downtown revitalization

5. Urban Tree Canopy (UTC)
Assessment

6. Network & Resources

7. Diverse Network Partners

9. Sustainable Benefits
Annual Ecosystem Services in Boise
 Air Quality
 $3.3 million in
reduced adverse
human health impacts
 Stormwater
 $485,000 in reduced
infrastructure costs
 Economic impact
 Stronger businesses
 Higher residential
property value
Source: 2013 TV Urban Tree Canopy Assessment

10. Downtown Boise
At-A-Glance
 Regional Park &
smaller pocket
parks
 18% UTC
 10% urban core
 Most in ROW
 1,500 potential
planting sites
 800 in urban core
 Street trees not
included

11. Downtown Boise
Tree Canopy pre-2013
 Historically small
tree-wells
(4’x4’ or 6’x6’)
 Poor health
 Damage
 Limited public &
environmental
benefit
 Reflects poorly on
Boise
 Life-span (10+ yrs)

12. Sustainable Benefits
Creating Places for People

13. Sustainable Benefits
Creating Places for People

14. Sustained Collaboration
Regional
Planning
• Strategic partnerships create effective change
• Regional UTC Assessment & planning tools
• Treasure Valley Canopy Network (Lance)
Urban
Infrastructure
Investment
• Strategic stormwater modeling drives Green
Stormwater Infrastructure (GSI)
• Ecosystem Sciences (Tim)
Building a
Sustainable
City
• Design & implementation approaches maximize
community buy-in
• DeepRoot (Shawn)

15. Network Data & Tools
Urban Design, Conservation and
Preservation
GIS data informs local
planning efforts
 City of Boise
Community Forestry
Plan (10yr Horizon)
 ACHD’s Sub-
watershed Planning

17. Ada County Highway District (ACHD)
Subwatershed Planning Process
• Stormwater
infrastructure
• ArcHydro
DELINEATE
SUBWATERSHEDS
• PCSWMM
• ACHD Monitoring
Data
MODEL STORMWATER
DYNAMICS
• Model outputs +
ACHD data
• Re-development
opportunities
PRIORITIZE GREEN
STORMWATER
INFRASTRUCTURE
(GSI)

18. Delineate Subwatersheds (subareas)
 LiDAR Data
 ArcHydro – ArcGIS Extension
 ACHD Historical Data
 Field Verify

19. Model Stormwater Dynamics
PCSWMM => Set-up Model => Calibrate => Run Model

20. Prioritize
Green Stormwater Infrastructure (GSI)
 Pollutant loads (lbs./acre)
 High pollutant load = High priority
 Runoff (gallons/acre)
 High Runoff = High priority
 Depth to Groundwater (Well Logs/Static Depth)
 Greater Depth to Groundwater = Optimal GSI
 ROW (% of Subarea)
 High % of ROW in Subarea = Increased ACHD options
TIER I
 Contamination
 Brownfields, Leaky Underground Storage tanks, RCRA
 Redevelopment
 High Priority Sites for Redevelopment/Development

21. Sustained Collaboration
Regional
Planning
• Strategic partnerships create effective change
• Regional UTC Assessment & planning tools
• Treasure Valley Canopy Network (Lance)
Urban
Infrastructure
Investment
• Strategic stormwater modeling drives Green
Stormwater Infrastructure (GSI)
• Ecosystem Sciences (Tim)
Building a
Sustainable
City
• Design & implementation approaches maximize
community buy-in
• DeepRoot (Shawn)

22. Partner Coordination
Treasure Valley
Canopy Network
GSI/Stormwater
Urban
Forestry/CCDC/Ada
County Highway
District
Deeproot/
Jensen Belts Assoc/
Quadrant Consulting
Guho Corp
General Contractors

23. Silva Cell Technology
Integrated tree, soil and stormwater system
• modular building block beneath paving
• supports H20 traffic loads
• contains unlimited amounts of uncompacted soil for treating stormwater
• accommodates surrounding utilities
• supports the growth and health of large shade trees

24. Typical 5’ x 5’ Tree
Opening, approximately
75cf of soil per tree
Silva Cells under pavement
delivering an additional 900cf of
soil per tree and treating up to
180cf of stormwater

25. Sustainable Investment
in the Built Environment

26. Sustainable Investment
in the Built Environment
 Silva Cells installed in Boise provide:
 Total Soil volume: 51,260cf soil
 Total trees planted: 102 (500cf)
 Total Stormwater offline: 10,252 cf stormwater
 Total anticipated canopy: 72,063sf

27. Effective Implementation
 Lessons Learned
 Pre-construction
stakeholders conference /
access discussion
 Construction signage /
temporary access
 Access to temporary
parking during approach
closures

28. Planning for SUCCESS
 Address problems ahead of
time
 Utility coordination
 Existing Storefront Elevations
 Communicate with businesses
 Before
 During
 Minimize impact through
extended work hours
 Business comes first!

29. Grove Plaza
 Renovation of
30 year Old
Plaza
 33 New Trees
with Silva Cells
 Stormwater
Treatment

30. Central Addition LIV District
 Construction
began Sept
2016
 5 City Blocks
Complete
Streetscapes
Renovation
 100% Storm
Water Treatment
On Site

31. Regional
Planning
• Strategic partnerships create
effective change
Urban
Infrastructure
Investment
• Strategic tools & modeling
drives sustainable investments
Building a
Sustainable
City
• Design & implementation
ensures community buy-in
Learn more & stay connected
at: www.tvcanopy.net