Orestimba Creek Feasibility Study - Stanislaus County

Economics Appendix – Draft Report - Orestimba Creek Feasibility Study, Stanislaus County, California – September 2012
Table 7-2: Net Benefits and Benefit-to-Cost Ratio Ranges – Final Array of Alternatives
October 2011 Prices ($1,000’s), 4% Interest Rate
Alternative
IDC Annualized Cost +
Total First Cost (1,000) 1 ($1,000) 2 O&M ($1,000) 3
Low
(25%)
Mid
(50%)
High
(75%)
Mid
Low
(25%)
Mid
(50%)
High
(75%)
Annual Benefits
($1,000) 4 Annual Net
Benefits ($1,000) 5
Low
(75%)
Mid
(50%)
High
(25%)
Benefit to Cost
Ratio 5
Low Mean High Low Mean High
SB-1: No Action 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 0.0
NED 33,736 34,843 36,017 2,205 1,669 1,723 1,781 1,282 2,679 4,363 22 1,054 2,133 1.0 1.6 2.2
LPP 41,285 42,927 44,260 2,719 2,042 2,123 2,189 1,282 2,679 4,363 -377 657 1,739 0.8 1.3 1.8
1 Cost Range: Min= 25% Mid=50% Max= 75% (confidence costs are less than given value)
2 IDC based on equal annual spending over a 2 year construction schedule.
3 First Costs plus IDC amortized over 50 years at 4% plus annual O&M. Annual O&M costs: NED = $164k, LPP = $180k
4 Benefit Range: Min=75% Mid=50% Max=25% (confidence benefits are greater than given value given all R&U)
5 Values are a result of Monte Carlo simulations using triangular distributions of annual benefit and annual cost confidence intervals as inputs. Mean = Mean result from
Simulation. The 5% tails on the low and high end of the simulation result are not included.
48