The fence through this area will mostly be built atop of existing levees, which is the logical place to put it. The river meanders wildly through this area and to put the fence directly on the river would increase the fence's length at least three fold. Also if the fence were built along the river you have to figure in the additional cost that building it across every creek, arroyo and gully would add.
“The fence through this area will mostly be built atop of existing levees, which is the logical place to put it. The river meanders wildly through this area and to put the fence directly on the river would increase the fence’s length at least three fold. Also if the fence were built along the river you have to figure in the additional cost that building it across every creek, arroyo and gully would add.”
If the cost is more than the cost of reimbursing these people for their lost land then pay them and do it. If not then build it on he river.