435,000

This study will consider the feasibility of providing additional locks in the Long
Sault Canal, which is the principal U.S. section of the St. Lawrence Seaway.
Traffic on the seaway has been increasing steadily since its opening in 1959. Pre-
liminary traffic figures for 1966 indicates traffic was about 49,000,000 tons, for the
1st time exceeding forecasts made in 1958. Recent traffic forecasts made for toll
studies indicate traffic will continue to rise. The capacity of the existing
locks, therefore, will be reached in the reasonably foreseeable future. The chan-
nels in the seaway can accommodate more traffic if the lock capacity is increased.
Capacity of the present locks is determined in part by the size of vessels using
the locks and in part by the characteristics of the locks themselves, particularly
their length and width. Many ships using the seaway are already of the maxi-
mum size permitted by the locks and little increase in capacity can be obtained
from this direction. To increase the dimensions of the locks would be difficult
and costly inasmuch as traffic must be maintained during the construction period.
The most feasible plan of improvement appears to be to provide additional locks
parallel to the existing locks, with dimensions adequate to accommodate the larger
ships that may desire to use the seaway in the future. Such ships now exist on
the ocean and larger Great Lakes vessels are expected to be in service in a few
years after the new Poe lock at Sault Ste. Marie, Mich., is opened to navigation.

(b) Flood control studies.-The amount of $1,133,000 is requested for prosecution of 25 studies during fiscal year 1968. This amount will permit completion of four reports, progress on 16 reports, and initiation of work on five others.

Tentative allocations by studies follow:

185, 000

35, 000

60,000

60, 000

30,000

UM.

250,000

0

20,000

230,000

Mississippi River-Canle to mile 300, linols, Town, Missouri and Wisconsin,

This study will review prior interim reports in the light of the April-May 1965
flood to consider the flood problems of those communities along the Missisippi
River in the Rock Island district still open to flooding. The flood of 1965 produced
the highest stages on the Mississippi River in the 80- to 90-year period of record and
caused damages in this 300-mile reach exceeding $55,000,000 to some 62 cities, towns,
and levee districts, including important centers as Dubuque-East Dubuque (com-
bined population 58,688), Clinton-Fulton (combined population 36,976), Daven-
port-Rock Island-Moline-East Moline-Bettendorf (combined population 211,815),
Muscatine (population 20,997), Burlington (population 32,430) Keokuk (population
16,316), and Quincy (population 43,793). Local flood protection by means of levees.
floodwalls, and interior drainage improvements will be studied.
Rock River, above Rockton, Ill. and Wis.

This study will consider the advisability of improvements for flood control and
allied water and related land resources in that portion of the Rock River Basin
located upstream from Rockton, Ill., including the Pecatonica River, Sugar River,
and Turtle Creek. Major flooding on the Rock River and its tributaries in Wis-
consin occurred in the early spring months of 1959 and 1960, at which times 20
urbanized areas were affected by marginal flooding, with flood damage totaling
about $650,000. Communities suffering the heaviest damage are Janesville (popu-
lation 35,164), Beloit (population 32,846), Watertown (population 13,943), Fort
Atkinson (population 7,980), Jefferson (population 4,548), Mayville (population
3,607), and Columbus (population 3,467). (All population figures from 1960
census.) A flood of lesser magnitude occurred in June 1963, causing crop damage
along the Rock River in Wisconsin. Other water-related problems in the area
involve pollution and sedimentation. Local interests also desire improvement of
the recreational potential of Rock River and lakes in the area.
Spoon River.

The Spoon River rises in west-central Illinois, about 35 miles northwest of
Peoria, Ill., and flows generally southward to its confluence with the Illinois River
near Havana, Ill. The watershed comprises 1,820 square miles, and is primarily
rural in nature. Past floods have damaged crops, inundated or isolated farm
buildings, interrupted transportation, damaged local levees, and caused erosion
and sedimentation problems. Local interests desire relief from flooding and are
concerned about inadequate water supply. The study will investigate the ad-
visability of improvements in the Spoon River Basin for flood control, recreation,
water supply, low-flow augmentation, and other related water and land resources.
Upper Sagamon River, including Goose Creek

The Sangamon River is a tributary of the Illinois River within the Upper Miss-
issippi River Basin. Separate authorized studies on Goose Creek and the upper
Sangamon River Basin have been combined into a single investigation. The com-
bined study will investigate the engineering and economic feasibility of providing
improvements upstream of the authorized multiple-purpose Oakley Reservoir
project in the interest of flood control, recreation, water supply, low-flow aug-
Local interests feel the
mentation, and other related water and land resources.
development of upstream impoundments will reduce siltation in Oakley Reservoir,
improve water quality, minimize the need for excessive drawdown at the Oakley
project, and lend themselves to the orderly recreational development and beauti-
fication of the upper basin.

UM