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Flood-control works..

Reclamation and irrigation works.

Improvements desired.--

Public hearing ---

Improvements desired by local interests.

a South Santa Clara and San Benito Valleys.

b Pajaro Valley.

a Immediate program recommended by local interests.

b Recommended for further study.--

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Report of the district engineer--Continued."

Improvements desired-Continued.

Reasons advanced in justification for improvements desired..... 35

Cooperation offered by local interests.

Willingness and ability of local interests to fulfill requirements for

cooperation.

25

Field surveys.

點 3

Topography and hydrography.

3

Soil tests.-

Stream-gaging operations and rainfall measurements.

Ground-water-level measurements -

26

Field flood damage surveys.


Drainage problems.--

Examination by the district engineer.

26

Flood problems.---

38

Inundated areas.

Variations in flood flows..

27

River regimen with respect to flood flows.

37

Related problems.---

Summary of food and related problems.

a Carnadero Creek, Llagas Creek, San Felipe Lake region.... 38

b San Benito River, Tres Pinos Creek region.-

c Pajaro Valley --

29

Plan of improvement...

29

Complete flood protection versus partial flood protection..

The broad considerations governing the selection of any plan of

improvement for flood control..

29

Types of improvements considered.

29

a Reservoirs.

29

b Bypass floodways..

23

c Spreading works..

d Evacuation of lands and property

30 II.

e Stream clearing -

3 Bl. H

s Channel improvement by means of levees and bank protet-

tion works.---

Most practicable plan of improvement, Pajaro Valley

An alternate plan of improvement, Pajaro Valley.

Plan of improvement, South Santa Clara Valley.-

Estimates of first cost and annual charges..

Cost influences.

31

Conditions influencing annual charges and maintenance costs..

Project first cost estimates and cost of existing projects..

32

a Pajaro Valley levee project, plan A.--

b Pajaro Valley alternate levee project, plan B.

€ Existing 4.25 miles of levee project in Watsonville and

vicinity.

d Carnadero Creek levee project near Gilroy.

e Existing 1.04 miles of levee project on Carnadero Creek

near Gilroy.

Estimates of annual charges--

a Pajaro Valley levee project, plan A.-----

b Pajaro Valley alternate plan B..

c Existing levee project in Watsonville and vicinity.

d Carnadero Creek levee project near Gilroy..

e Existing levee project on Carnadero Creek near Gilroy..

Benefits from improvement.

General..

Protection provided..

Benefits from existing levees in Pajaro Valley -

Additional benefits afforded by plan B..

Additional benefits afforded by plan A.--

Benefits afforded by the Carnadero Creek levee project.

The evaluated average annual benefits.

Justification of projects and allocation of costs.

Ratios of evaluated benefits to costs..

Allocation of first cost of most practicable projects..

Extent of local cooperation required..

VI.)

31 II.

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(Only enclosures 1 and 3 are printed)

Enclosure 1. Drainage basin index map (drawing 65-31-3).
Enclosure 2. Flood plain map (drawing 65-34-1).
Enclosure 3. Plan of improvement (drawing 65–39-1).
Sheet No. 1. Levee projects-Schematic plans.
Sheet Nos. 2-10. Pajaro River levee Plan and profile.
Sheet No. 11. Pajaro River levee Plan, profile, and sections.
Sheet No. 12. Corralitos Creek levee-Plan and profile.
Sheet No. 13. Carnadero Creek levee - Plan, profile, and sections.

LIST OF APPENDIXES

(These appendixes are not printed)
I. Desires of local interests, local cooperation, etc.
II. General information.

III. Hydrology.

IV. Flood damages.

V. Field surveys and special investigations.

VI. Plan of improvement.

VII. Cost of improvements.

VIII. Benefits from improvement.

LETTER OF TRANSMITTAL

WAR DEPARTMENT,

Washington, March 15, 1944. The SPEAKER OF THE HOUSE OF REPRESENTATIVES.

DEAR MR. SPEAKER: I am transmitting herewith a report dated December 13, 1943, from the Chief of Engineers, United States Army, ogether with accompanying papers and illustrations, on a preliminary examination and survey of Pajaro River, Calif., authorized by the Flood Control Acts approved on June 22, 1936, and August 28, 1937.

The project, if adopted, would require a substantial amount of materials, manpower, and construction equipment without any benefit to the war program, therefore, the Department is of the opinion that submission of any estimate of appropriation for construction, or the initiation of any construction on this project should be deferred until after the war.

The Bureau of the Budget has been consulted and advises that while there would be no objection to the submission of this proposed report to the Congress, in the absence of evidence showing that the proposed works are necessary to the prosecution of the war, the submission during the present emergency of any estimate of appropriation for the construction of the project would not be in accord with the program of the President, Respectfully,

HENRY L. STIMSON,

Secretary of War.

VII

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