If you do a study with only costs, and no benefits, you get the answer you want not an analysis.
 According to Mr. Guettabi of UAA, the median income in the affected villages is $19,800 to $31,500 and 80% of the head-of-households are women?? 
If I am not mistaken, the same "sky is falling !!" attitude was taken about game when the pipeline was built.
This smells like a study to benefit UAA, the  Park Service and Economic Development folks. If TM wants the road, let them fund it