Assessing Fire Damages in Southwest. 417 



old, the age at which the stand becomes merchantable.* The 

 fully stocked instead of the average acre must be taken because 

 the reproduction destroyed has been reduced to terms of fully 

 stocked acres. The result will be the volume which the repro- 

 duction destroyed would have produced at 75 years. 



Increase the present stumpage price for the region of the burn 

 by the per cent, given for 20 years;** multiply this price by the 

 total value found above; find the average age of the reproduc- 

 tion destroyed, and deduct from 75 ; discount the total value of 

 the stumpage found above for the difference between 75 and the 

 age of the reproduction at the time of the fire, to get the expec- 

 tation value of the reproduction when burned. 



Example: 250 acres of forest fully stocked with reproduc- 

 tion burned ; 250 acres of forest with scattering reproduction 

 equivalent to 50 acres of fully stocked reproduction burned ; 306 

 acres is actual number of acres fully stocked with reproduction 

 that have been burned ; 4,300 feet per acre is the average mer- 

 chantable volume on a fully stocked acre 75 years old. 



4,300X300= 1, 290,000= total volume which the reproduction 

 destroyed would have produced at 75 years ; $2.oo=the present 

 stumpage of the region ; $4.oo=the present stumpage price in- 

 creased by 100%, the per cent, given for 20 years. 



$4.00X1,290 M. =$5, 160.00 total value of reproduction at 75 

 years; 15 years=average age of reproduction; 75 — 15=60 is the 

 period for which to discount the value of the reproduction ; 

 .0535=the factor for 60 years at 5% compound interest ; $5,- 

 i6o.ooX-053S=$276.o6, the present value of the reproduction 

 destroyed. 



4. Value of Forage Destroyed: (i) Determine as nearly as 

 practicable the total number of acres of range burned over and 

 the number of months during which time forage on this area is 

 lost. Ordinarily in the Southwest grass may be considered to 

 replace itself within one month after the start of the summer 

 rains. 



(2). Determine from standards which are based upon adopted 



*From Mr. T. S. Woolsey, Jr.'s tables on fully stocked Black Jack stand 

 based on two 5-acre plots on the Datil National Forest on soils of moder- 

 ate fertility. 



**Though the period will be greater than 20 years it is considered unsafe 

 to predict even a minimum rise of stumpage for periods longer than 20 

 years. 



