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JUSTIFICATION:

The project will provide flood protection to residential, commercial and industrial property in the Cities of
Idaho Falls and Blackfoot, the towns of Iona and Ammon, and the developed agricultural areas along Willow and Sand Creeks.
During the flood of 1962 extensive flooding occurred in the Willow-Sand Creek area.
The area to be protected comprises 110,000 acres with a total estimated value of approximately $266,170,000 for lands and im-
Depth of the flooding varied

provements.
$4,050,000 would be prevented by the project.
use and water for irrigation.
from 1 to 6 feet. A repetition of the flood of 1962 under present conditions would cause damage of $6,782,000, of which
In addition to flood protection, the project would provide areas for recreation
FISCAL YEAR 1972:
Total benefits creditable to the project will amount to $1,135,000 annually, of which
$1,055,000 would be due to flood control, $57,000 would be derived from recreation, and irrigation benefits amount to $23,000.

The requested amount of $1,000,000 will be applied to:

Initiation of relocations
Complete acquisition of lands

Continue construction of dam

Continue construction on access roads

NON-FEDERAL COST:

Initiate channel construction
Engineering and design
Supervision and administration

40,000

150,000

150,000
123,000

$1,000,000

Costs allocable to irrigation presently estimated at $620,000 are reimbursable.

STATUS OF LOCAL COOPERATION: Local interests are to make necessary arrangements with the Secretary of the Interior for repay-
ment under provisions of Reclamation Law, of the construction cost and annual operation, maintenance and replacement costs
allocated to irrigation. By a letter dated 10 June 1966, the Assistant Secretary of Interior provided assurances to Chief of
Engineers that the estimated irrigation allocation would be within the repayment capability of the irrigators.
Reclamation office at Boise, Idaho is formulating a contract for negotiations with water users.
The Bureau of

$ 162,000

120,000 255,000

Total

COMPARISON OF FEDERAL COST ESTIMATES: latest estimate of $16,600,000 submitted to Congress. This change is due to higher price levels. The current Federal cost estimate of $17,400,000 is an increase of $800,000 over the

APPROPRIATION TITLE:

Construction, General

Reservoirs (Flood Control)

PROJECT:

Ririe Lake, Willow Creek, Idaho (Continuing)

LOCATION:

On Willow Creek, a tributary of the Snake River, about 15 miles northeast of Idaho Falls.

AUTHORIZATION:

1962 Flood Control Act

BENEFIT-COST RATIO: 1.7 to 1

SUMMARIZED FINANCIAL DATA

Accum.
STATUS: (1 January 1971)

PERCENT COMPLETION
% of Est.

COMPLETE SCHEDULE
Estimated Total Appropriation Requirement $17.400.000 Fed. Cost
Future Non-Federal Reimbursement -620,000

Lands acquisition

63 Jun 1972
Estimated Federal Cost

16,780,000
Relocations

0 Dec 1973
Estimated Non-Federal Cost

620,000
Reservoir

0 Dec 1973
Reimbursement: Irrigation

620,000
Dam

20 Oct 1973
Total Estimated Project Cost

$17,400,000
Fish and Wildlife Facilities

0

Jun 1974
Roads Access

37 Nov 1973
Allocations to 30 June 1970

$ 3,350,000 Channels

0

Sep 1973
Allocation for FY 1971

2,250,000
Buildings, Grounds, and Utilities

46

Nov 1973 Allocations to Date $ 5,600,000 32 Entire Project

28 Jun 1974
Appropriation Requested for FY 1972

1,000,000 38
Balance to Complete after FY 1972

10,800,000

PHYSICAL DATA
Dam: Type - Rockfill
Reservoir Capacity:

Channel:
Height 184 feet

Total Storage

100,000 ac-ft Length 8.2 miles Length 840 feet

Exclusive Flood Control

10,000 ac-ft Capacity 900 cfs

Irrigation and flood Control
Spillway: Type Concrete lined with (Joint usage)

80,000 ac-ft Relocations: 10 Roadway bridges;
gate controlled concrete ogee

Sediment and Conservation 10,000 ac-ft 1 Railroad Bridge; telephone cable
section.

and gas line crossing $431,000.
Capacity 40,000 cfs maximum
Gates

Two 40.5- x 26 ft tainter

Lands and Damages:

Acres - 6,850; Type

Predominantly dry rangeland; Improvements

- Two sets of ranch buildings. FISCAL YEAR 1972: The requested amount of $1,000,000 will be applied to:

JUST IFICATION: The project will provide flood protection to residential, commercial and industrial property in the Cities of Idaho Falls and Blackfoot, the towns of Iona and Ammon, and the developed agricultural areas along Willow and Sand Creeks. The area to be protected comprises 110,000 acres with a total estimated value of approximately $266,170,000 for lands and improvements. During the flood of 1962 extensive flooding occurred in the Willow-Sand Creek area. Depth of the flooding varied from 1 to 6 feet. A repetition of the flood of 1962 under present conditions would cause damage of $6,782,000, of which $4,050,000 would be prevented by the project. In addition to flood protection, the project would provide areas for recreation use and water for irrigation. Total benefits creditable to the project will amount to $1,135,000 annually, of which $1,055,000 would be due to flood control, $57,000 would be derived from recreation, and irrigation benefits amount to $23,000.

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NON-FEDERAL COST:

Costs allocable to irrigation presently estimated at $620,000 are reimbursable.

STATUS OF LOCAL COOPERATION: Local interests are to make necessary arrangements with the Secretary of the Interior for repayment under provisions of Reclamation Law, of the construction cost and annual operation, maintenance and replacement costs allocated to irrigation. By a letter dated 10 June 1966, the Assistant Secretary of Interior provided assurances to Chief of Engineers that the estimated irrigation allocation would be within the repayment capability of the irrigators. The Bureau of Reclamation office at Boise, Idaho is formulating a contract for negotiations with water users.

COMPARISON OF FEDERAL CCST ESTIMATES: The current Federal cost estimate of $17,400,000 is an increase of $800,000 over the latest estimate of $16,600,000 submitted to Congress. This change is due to higher price levels. ADDITIONAL CAPABILITY

Senator STENNIS. The request for fiscal year 1971 was $4,700,000 compared with a request for fiscal year 1972 of $1 million, and I note that the completion date has been delayed 1 year—that is, from June 1973 to June 1974. What is your full capability on this project for fiscal year 1972?

General KELLEY. Sir, our full capability is $2,600,000, or $1,600,000 over the budget amount.

Senator STENNIS. If additional funds were provided could you regain any of the slippage on this project?

General KELLEY. Yes, sir; subject to the usual qualifications, the additional funds would permit earlier awards of two important contracts which would permit taking full advantage of the construction season thereby advancing project completion by 6 months. This project is in an area where the construction season is relatively short because of the severe weather.

ADEQUACY OF FUNDS TO CONTINUE CONSTRUCTION

Senator STENNIS. I note that you are requesting only $255,000 for continuation of construction of the dam. Will this amount be adequate to meet the contractor's needs? You will recall that funds were requested last year in the amount of $3,891,000 to continue construction of the dam.

General KELLEY. Yes, sir; that amount is adequate for the fiscal year's needs of the first of two dam contracts. The start of work on the second contract, completion of the dam, was rescheduled from May 1971 to April 1972 because of fiscal year 1972 fiscal restraints. Of the additional capability of $1,600,000 I mentioned, $1 million would be applied to this second contract. This added capability would permit a much earlier start on the remaining work by allowing the successful bidder to place orders for spillway gates, reinforcing steel, cement, earthmoving equipment, and to prepare shop drawings, all of which would assist in coordinated scheduling and on-time deliveries to the job site.

CONTRACT DATA Senator STENNIS. When was the dam contract actually awarded? How many bidders were there? What were the high and low bids and the Government estimate at the time of bid opening?

General KELLEY. Sir, the first phase dam contract was awarded May 21, 1970, and is currently scheduled to be completed June 30, 1971. There were two bidders. The high bid was $1,940,000 and the low bid was $1,909,000; the Government estimate at the time of bid opening was $2,374,000.

STATUS OF IRRIGATION COSTS REPAYMENT

Senator STENNIS. What is the status of the contract between the Bureau of Reclamation and water users for repayment of the irrigation costs?

General KELLEY. Sir, the Bureau of Reclamation has prepared drafts of the irrigation contract and submitted them to the local irrigation districts for review.

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Senator STENNIS. We will insert the justification for the Elk Creek Lake project in the record.

(The justification follows:)

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