As an aside, the "why not over, under, or around?" question that gets asked. https://www.firehouse.com/operations-training/hoselines-water-appliances/article/1

As an aside, the "why not over, under, or around?" question that gets asked. https://www.firehouse.com/operations-training/hoselines-water-appliances/article/12373752/water-supply-for-fireground-operations-hydrants-ldh-water-main-firefighter-training https://www.firehouse.com/operations-training/hoselines-wate... That has some "how much pressure can be loss to friction and still provide the necessary water rate at the other end." Bends in the hose will increase the amount of friction and thus reduce the flow rate.