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TABLE 8: Estimated Total Workload and Total Costs of Performing Work with Contractors Versus Additional Staff
ACTIVITY
CURRENT ESTIMATED WORKLOAD
TOTAL ESTIMATED COSTS FOR CONTRACTORS $318,656 (Estimated using 2009 contract with Bartlett Tree Experts) $117, 000 (Based on quote from Bartlett Tree Experts, 2012) $282,834 (Estimated using 2009 contract with Bartlett Tree Experts) $372,335 (Estimated using 2009 contract with Bartlett Tree Experts)
TOTAL ESTIMATED HOURS FOR STAFF
ESTIMATED COSTS OF STAFF ($18-$33 PER HOUR)
CONTRACTOR COSTS MINUS STAFF COSTS
Large Tree Pruning
3,486 trees
6,945 hours (Estimated using per-tree pruning data provided in APWA 2007b)
$125,010 to $229,185
$89,471 to $193,646
Inventory and Inspection
15,000 trees
1,000 hours (estimated
$15,000 to $33,000
$84,000 to $99,000
based on work experience with tree inventories)
Small Tree Pruning
10,863 trees
7,280 hours (Estimated using per-tree pruning data provided in APWA 2007b) 6,375 hours (Estimated from demonstration at 2012 NCUFC conference) 675 hours (Estimated at 4 trees per hour) + cost of mulch
$131,040 to $240,240
$42,594 to $151,794
Root Collar Excavation
8,277 trees
$114,750 to $210,375
$161,960 to $257,585
Mulching
2,700 trees
$45,051 (Estimated using 2004
$12,150 to $22,275
$22,776 to $32,901
Tree Inventory Management Plan by Davey Resource Group)
Nonhazardous Tree Removal
545 trees
$71,087 (Estimated using 2004
525 hours (estimated based on removals performed in 2011 and 2012)
$9,450 to $17,325
$53,762 to $61,637
Tree Inventory Management Plan by Davey Resource Group) $86,000 + costs of trees (estimated from 2011 tree planting contract)
1,290 hours + costs of trees (estimated at 1.5 hours per tree for transport and planting)
$23,220 to $42,570
$43,430 to $62,780
Tree Planting
860 trees, stumps, and obvious vacancies currently in need of replanting
Total
41,731 trees
$1,293,000
24,090 hours
$434,000 to $795,000
$498,000 to $859,000
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