Money base_cost;
            if (IsCanal(tile)) {
                base_cost = _price[PR_CLEAR_CANAL];
            } else if (IsRiver(tile) && _game_mode == GM_NORMAL && !_settings_game.construction.dynamite_river && !_cheats.magic_bulldozer.value) {
                base_cost = 0;
            } else {
                base_cost = _price[PR_CLEAR_WATER];
            }