This stream has been described in the report on the flood of 1902,
already referred to. It contributes a large amount of water to the main
artery of the Passaic below Dundee dam, and as the river channel at that
point is overburdened under the present conditions because of lack of
slope and numerous catchments, together with what is known as the
Wallington Bend, it increases very materially the damage caused by
floods.
The most effectual remedy in the case of Saddle River floods is that of
construction of flood catchments. No studies have been made of the
situation in the Saddle River drainage area, but a superficial
inspection of the basin shows that opportunities for the construction of
flood-catchment reservoirs are not numerous.
SUMMARY OF FLOOD-CATCHMENT PROJECTS.
By following the plans described in the preceding pages absolute flood
catchments may be provided above Little Falls on the Passaic Basin for
551.7 square miles, leaving only 221.2 square miles from which flood
run-off would flow immediately. The accomplishment of this would involve
the construction of Pompton reservoir, which would withhold all flood
waters from the northern tributaries. It would leave unprovided for 20.2
square miles on the Rockaway, 71.7 square miles on the Whippany, 46.2
square miles on the upper Passaic, and 83.7 square miles tributary to
the Central Basin and not included above.
Leaving Pompton reservoir out of consideration, and conserving flood
run-off on the Ramapo, Wanaque, and Pequanac rivers, there would be
absolute flood catchment up to a 12-inch run-off over 494.8 square miles
above Little Falls. This would leave 278.1 square miles unprovided for,
the run-off from which would not overburden the channel in the lower
valley, provided, of course, that channel were improved to a maximum
carrying capacity.
PREFERABLE RESERVOIR SITES.
The following table and discussion of preferable sites for flood
prevention are taken from the report of the engineering committee of the
northern New Jersey flood commission:
Table showing detailed facts regarding possible reservoir sites on
Passaic drainage basin.
KEY:
A: Area of watershed.
B: Area of reservoir.
C: Height of dam.
D: Length of dam.
E: Elevation of flow line.
F: Storage, watershed.
G: Storage capacity.
H: Total cost.
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