Prescribed Burning - What Is the Cost?
by Ken Gee and Jon Biermacher
We have had several Ag News and Views articles in the past addressing various aspects of using prescribed fire as a land management tool. We often recommend prescribed burning as a method to manage native rangeland and wildlife habitat - and, indeed, many of us believe that fire should be considered an integral component to most rangeland management systems. With all of the touted benefits of prescribed burning, however, we often do not associate costs with the use of fire. In the mid-90s, Russell Stevens and others wrote a Noble Foundation fact sheet addressing the costs associated with prescribed burning, but, as several years have passed, we thought it would be interesting to take another look and compare current costs of three actual burns that we implemented on Noble Foundation properties in 2007.
For purposes of this report, estimates of equipment and machinery costs were calculated assuming the capital items were owned by the landowner and depreciated over a 10-year period. However, we note here that, if the equipment was rented, the costs would probably be somewhat higher. Conversely, if the equipment was previously owned or borrowed, costs could be substantially lower.
If loss of grazing is not an issue, as might be the case with land managed primarily for recreational purposes, then deferment cost might not be included in the cost of the burn. This would significantly reduce the cost of burning. We chose to include deferment costs based on land lease values only. We did not consider costs associated with potential loss of livestock production and income during deferment. On the other side of the ledger sheet, we did not account for the value of the expected benefits associated with land improvement resulting from the prescribed fire or the costs associated with not burning. These figures could vary substantially and alter the cost of the burn.
In general, the cost of burning is dependent on many factors such as landowner goals, land use, grazing system, weather, topography, etc. As a result, to determine the cost of a prescribed fire, one should evaluate each burn individually. For the three burns referenced in this report, the per-acre cost was highly variable. However, when measured in terms of linear feet of fireguard managed, the cost of burning was much less variable between sites. This indicates that the shape of the burn site and the amount of fireguard that must be managed during the burn are primary factors in determining cost. Keep this in mind when planning a burn.
| 2007 Noble Foundation Burns | |||
| Large burn at Coffey Farm |
Medium burn at Coffey Farm |
Small burn at Pasture Demonstration Farm |
|
| Land Description | |||
| Total area (acres) | 833 | 172 | 29 |
| Grassland (grazeable acres) | 208 | 26 | 17 |
| Brush or timber (acres) | 625 | 146 | 12 |
| Fireguard type | mowed, road | mowed, road | Chain-sawed, mowed, road, blackened, green |
| Length of managed fireguard (feet)* | 28,845 | 11,775 | 6,134 |
| Labor | |||
| Fireguard prep @$10.00/man-hr | (3) $30.00 | (4) $40.00 | (13) $130.00 |
| Burn crew size | 6 | 8 | 6 |
| Burn hours | 7 | 9 | 5 |
| Burn crew @$10.00/hr | $420.00 | $720.00 | $300.00 |
| Food and drink @$7.50/person | $45.00 | $60.00 | $45.00 |
| Labor cost | $495.00 | $820.00 | $475.00 |
| Equipment | |||
| Drip torch @$1.45/day | (2) $2.90 | (2) $2.90 | (2) $2.90 |
| Drip torch fuel @$2.50/gallon | (12) $30.00 | (8) $20.00 | (5) $12.50 |
| Radios @$2.00/day | (4) $8.00 | (4) $8.00 | (2) $4.00 |
| Fire rake @$0.34/day | (2) $0.68 | (2) $0.68 | (2) $0.68 |
| Tractor (for burn) @$37.50/day | (1) $37.50 | (2) $75.00 | (1) $37.50 |
| Tractor (for fireguard prep) | (1) $37.50 | (1) $37.50 | (1) $37.50 |
| Pickup truck @$18.75/day | (1) $18.75 | (1) $18.75 | (1) $18.75 |
| Pickup and tractor fuel @ $2.50/gallon | (30) $75.00 | (40) $100.00 | (30) $75.00 |
| Mower @$10.00/day | (1) $10.00 | (1) $10.00 | (1) $10.00 |
| Four-wheeler @$5.00/day | (2) $10.00 | (1) $5.00 | (1) $5.00 |
| Cattle sprayer (for burn) @$25.00/day | (2) $50.00 | (2) $50.00 | (2) $50.00 |
| Cattle sprayer (for fireguard prep) | (1) $25.00 | ||
| Four-wheeler sprayer @$19.00/day | (1) $19.00 | (1) $19.00 | (1) $19.00 |
| Chainsaw (for burn) @$3.00/day | (1) $3.00 | (1) $3.00 | (1) $3.00 |
| Chainsaw (for fireguard prep) | (1) $3.00 | ||
| Equipment fuel @$2.50/gallon | (7) $17.50 | (5) $12.50 | (6) $15.00 |
| Equipment cost** | $319.83 | $362.33 | $318.83 |
| Deferment | |||
| Grazing value/acre | $4.00 | $4.00 | $6.00 |
| Percent deferment | 75 | 75 | 100 |
| Deferment cost | $2,499.00 | $516.00 | $174.00 |
| Total cost | $3,313.83 | $1,698.33 | $967.83 |
| Cost per acre | $3.98 | $9.87 | $33.37 |
| Cost per foot of managed fireguard | $0.11 | $0.14 | $0.16 |
| Numbers in parentheses indicate number of items or units used in the burn. * On the large burn at Coffey, we were able to use the Red River as the south fireguard and essentially did not have to manage it. ** To estimate cost of machinery and equipment, we followed procedures published by the American Society of Agricultural and Biological Engineers. |
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