The engineering committee, after presenting the merits of both Great Piece Meadow and Mountain View projects, therefore recommends the adoption of the latter in spite of its greater cost, because it is believed that in the end the construction of the Great Piece project would involve an expenditure not warranted by public economy or general expediency. GENERAL CONCLUSIONS. 1. Great floods in the Passaic Basin arise only after a specially violent precipitation. 2. Under present conditions floods may be expected at frequent intervals. 3. A part of the damage along the lower valley is the result of encroachments on the part of individuals and public and private corporations. 4. The channel in the lower valley may be improved at certain points by straightening it and judiciously making cut-offs. 5. Without the construction of numerous levees the lower valley channel can not be made to carry great flood waters without damage. 6. Immunity from floods can be effected only by the construction of catchment reservoirs in the highlands or levees in the lowlands. 7. Levee construction would involve more damage than is now caused by floods, and the cost thereof would be prohibitive. 8. Flood catchment reservoirs may be constructed economically and provide storage to compensate for the dry-season flow, thereby maintaining water power at Paterson, Passaic, and other points, and providing for municipal water supply in the future. INDEX. Arch street bridge, Paterson, destruction of; 27 Beattie's dam, flood flow at; 16-17 flood period at; 9 view of; 16 Bridges, destruction of; 26-27 Capacity of streams, increase in; 28 Central Basin, damage in; 24 flood in, descent of; 14-15 Charlotteburg, rainfall at; 11, 12 Chatham, flood period at; 10 Chester, rainfall at; 11 Cranberry Pond, dam at, failure of; 24 Damages, discussion of; 23-28 Darlington, reservoir site at; 33 Dixons Pond, reservoir site at; 37 Dover, rainfall at; 11, 12 Drought, relation of rainfall to; 12 Dundee dam, flood flow over; 17-22 flood flow over, diagram showing; 20 flood period at; 9 floods at, comparison of, figure showing; 18 East Jersey Water Company, damage at pumping station of; 25-26 Elizabeth, rainfall at; 11 Essex Fells, rainfall at; 11, 12 Flood, descent of; 14-22 period of; 9-10 prevention of; 28-44 Flood damage, plates showing; 26, 28 Floods, general conclusions concerning; 44-45 Great Passaic Swamp, reservoir site at; 38-39 Great Piece reservoir, cost of, estimate of; 42 Greenwood Lake, use of; 34 Hanover, rainfall at; 11 Hebrew quarter, Paterson, devastation in, plate showing; 28 Highland tributaries, damages along; 23-25 descent of flood in; 14-15 Hotel, wreck of, plate showing; 26 Little Falls, dam at, view of; 16 damage at; 25-26 flood flow at; 16-17 flood period at; 9 rainfall at; 12 Longwood Valley, reservoir site in; 37 Lower Longwood, reservoir site near; 38