City of Fort Wayne Statistics

Transcription

1 Fort Wayne Emerald Ash Borer 1 City of Fort Wayne Statistics As of December 1, 2009 there are 56,771 street trees in the city limits There are over 157 different varieties of street trees. These are trees in the right-of way along 1,234 miles of roadways. That averages out to about 46 trees per mile. The city has a population of 256,000 There is approximately 1 street tree for every 5 residents. The Parks and Recreation Department maintains 84 parks that encompass 2805 acres. 2 1

2 Fort Wayne s Urban Forest 3 Fort Wayne Ash Tree Statistics As of December 1, 2009, ash trees make up 22% of our Street Tree population or 12,956 ash trees. Ash trees are planted throughout the entire city. Some neighborhoods are monoculture of ash trees. 4 2

3 Fraxinus population in Fort Wayne Ash trees make up 22% of our Street Tree population 5 Fort Wayne City Ash Tree Inventory Size Distribution of Ash Trees Number of Trees Ash Size Class (DBH) 6 3

4 Street Trees Per Quad Street Tree Population Per Quad 13% 19% 39% NORTHEAST SOUTHWEST SOUTHEAST NORTHWEST 29% Total Street Tree Population of 56,771 trees 7 8 4

5 Ash Tree Example With Trees 9 Ash Tree Example Without 10 5

6 Fort Wayne EAB Finds 11 Components of Plan Development 1. Street Tree Inventory 2. Funding/Budget 3. Treatment Choice 4. Politics/Support 5. Writing Specification 6. Public Awareness 7. Disposal of debris 8. Risk management 9. Re-evaluate 12 6

7 Street Tree Inventory Street Tree Inventory since 1992 Delineates size of Ash population Supplies supporting data for city council Indicates the health of each tree Helps choose which trees to treat Create tree list for contractor/in-house -accurate DBH for treatments Helps with follow-up reports SUSI Project 13 2,500,000 2,000,000 1,500,000 1,000, ,000 0 TOTAL BENEFITS TOTAL BENEFITS $5,872,011 Benefits LESS 450, , , , , , , , , Reported Program Costs Reported Program Costs $674,000 Costs EQUALS $5,198,011 Net benefit 14 7

8 City of Fort Wayne Total Annual Benefits Total Annual Benefits 1,927,378 1,723,092 Total Net Benefits $5,872,011 1,718, , ,982 Energy CO2 Air Quality Stormwater Aesthetic/Other 15 Funding/Budget Is there funding? Private funding or municipal budget Strings attached?- Treatment only funding Duration of Funding Utilize multiple avenuescollege marketing class, neighborhood associations, not for profits 16 8

9 In-House/Contractor Amount of Funding Adequate funding was available Staffing level Did not have sufficient staff Forestry Division has 4 full time and 4 seasonal employees. Maintain current pruning cycle and removals Ice Storm!- Major contributing factor 17 Ice Storm

10 Politics/Support Know your council Prove the trees are assets. Green benefits Be prepared know the facts. Environmental issues 19 Use the local media Neighborhood or quad meetings Inform the public(the 5 w s). Public Awareness Print flyers or door knockers 20 10

11 Two main sites for disposal of chips There was one main site for wood disposal Quarantine areas Chipper rodeo -certified chippers Debris Disposal 21 Treatment Choice Research the options!!! Talk to people with EAB experience Community and infrastructure needs Treatment vs. Cut and Replace? 22 11

12 Possible Solutions Don t do anything Ash trees will die. We remove them at that time. Remove all ash trees and replace with other species (diverse culture) Treat all ash trees Or a COMBINATION OF ALL OF THE ABOVE 23 Option 1 - Don t do Anything Initially, it s the least costly proposal. Increase liability on the Department Not proactive Later costs are going to increase with mortality, inflation and having to deal with larger trees to remove Projected costs of $5,100,000 over 15 years (using 2008 $) 24 12

13 Option 1 - Graph Proposed Removal Costs $700,000 $600,000 $500,000 $400,000 $300,000 $200,000 $100,000 $ Year 25 Option 2 Remove and Replace Initially, it s the most costly proposal Removals of various size trees and planting with smaller 2 diameter trees that are 8 10 feet tall Peace of mind that EAB will not affect future trees Projected costs of $8,600,000 over 15 years (using 2008 $) 26 13

14 Option 2 - Graph Removal and Replacement Costs $1,000,000 $900,000 $800,000 $700,000 $600,000 $500,000 $400,000 $300,000 $200,000 $100,000 $ Year 27 Option 3 Treatment Initially, it s the least costly proposal Treating ash trees from 4 diameter on up Treatment would be every year Projected costs of $3,300,000 over 15 years (using 2008 $) 28 14

15 Option 3 - Graph $500,000 $450,000 $400,000 $350,000 $300,000 $250,000 $200,000 $150,000 $100,000 $50,000 $ Year 29 Option 4 Combination Plan Evaluate all of the ash trees Determine if specimen is worth saving If not, remove it when it dies Remove and replace those trees that are small with other species Maintaining the city tree canopy Treating those larger ash trees that are in good health and those in neighborhoods of monoculture Projected costs of $3,000,000 over 15 years (using 2008 $) 30 15

16 Specifications Standard boiler plate Be specific. -products, flow meter, -certain product or equivalent! Environmental laws and pesticide laws A certified Arborist and chemical applicator license required. Hours of operation Price per DBH inch-flexibility EAB Plan At first the plan was to Cut and replace the trees as they died. We received funding late in Treatment only funding. Treated 11,704 Ash trees out of 12,295. Not practical! 32 16

17 City of Fort Wayne Ash Tree Population Dynamics Ash Tree Population Dynamics NORTHEAST SOUTHWEST SOUTHEAST NORTHWEST Number of Ash Trees Number of Ash treated % of Population treated Percentag e of Ash per quad NORTHEAST SOUTHWEST SOUTHEAST NORTHWEST EAB Cost Calculator will: Estimate costs for a management strategy for 25 years. Estimate size of the remaining forest over time Size of forest = Sum of DBH 34 17

18 Remove, Replace, or Treat all Ash Trees Initial Ash DBH Half Ash DBH 100% 50% 35 Replace All Ash vs. only Large or Small Initial Ash DBH Half Ash DBH 100% 50% 36 18

19 Treat All Ash vs. Replace Large or Small Initial Ash DBH Half Ash DBH 100% 50% EAB Plan Purdue University-Cliff Sadof s EAB Cost Calculator Re-organized funding to allow for a more diverse plan. Only treating 5%-10% of Ash population Equal number of trees in each quad Start cutting and replacing the worst 38 19

20 In Retrospect 39 20