Report of the Chief of Engineers U.S. Army

utility settlement; completion of relocations and settlements in connection with highway relocation; concluding the acquisition of land in the reservoir area; construction of a public sanitary building and storage building; completion of landscaping, parking area. access road, and certain miscellaneous appurtenances to the dam. The total costs to the end of the fiscal year were as follows:

The total expenditures were $6,232,233.10, of which $6,206.561.81 was from regular funds and $25,671.29 from Emergency Relief funds.

Proposed operations.-The balance unexpended and accounts receivable on June 30, 1945, will be applied as follows:

Accounts payable, June 30, 1945

New work: Preliminary work by hired labor (July 1, 1945 to June 30, 1946)

Maintenance-operating and care of dam:

Operation

Ordinary maintenance and repairs

Total, maintenance

Total for all work

$1,367.67

16, 567.66

$17,700.00
2, 486. 28

20, 186, 2

38, 121.61

The additional sum of $360,000 can be profitably expended during the fiscal year 1946 to complete the new work under the project. The additional sum of $33,500 can be profitably expended during fiscal year 1947, as follows:

Maintenance (operating and care of dam):

Operation

Ordinary maintenance and repairs

Improvement and reconstruction

$25,500

4,000

Total cost of permanent work to June 30, 1945--

Plus accounts receivable June 30, 1945__

Gross total costs to June 30, 1945-_-.

Minus accounts payable June 30, 1945--

Net total expenditures..

Unexpended balance June 30, 1945_-.

Total amount appropriated to June 30, 1945--

1 Includes $25,671.29 from Emergency Relief funds.

Amount (estimated) required to be appropriated for completion of existing project

Amount that can be profitably expended in fiscal year ending

June 30, 1947:

For new work 2.

For maintenance

Total 2

26, 920. 45

3, 805. 76

23, 114. 69

11, 201. 16

34, 315.85

360,000.00

33, 500.00.

393, 500.00

Exclusive of available funds.

14. LOYALHANNA RESERVOIR, PA.

Location. The dam site is located on Loyalhanna Creek, 4.5 miles above the junction of the creek with the Conemaugh River at Saltsburg, Pa., and about 29 miles east of Pittsburgh, Pa. The reservoir is located entirely in Westmoreland County, Pa. (See U. S. Geological Survey chart for Latrobe, Pa.)

Existing project. This provides for the construction of a flood control reservoir dam of the concrete gravity type with a gate controlled center spillway flanked by abutment sections joining the valley sides, and an earth embankment section terminating in the left abutment. The dam is 960 feet long at the top, rises 113 feet above the stream bed, and provides for the gross controlled storage of 95,300 acre-feet of water from a tributary drainage area of 291 square miles. Of this storage 93,300 acre-feet are available for flood prevention at Pittsburgh and in the upper Ohio Valley,

672607-46-pt. 1, vol. 2- -27

generally. The remaining 2,000 acre-feet are in permanent storage. One penstock is contained in the structure for possible future generation of hydroelectric power. The reservoir is operated as a unit of a coordinated reservoir system for the protection of Pittsburgh and the upper Ohio Valley generally. The existing project was authorized by the Flood Control Act approved June 22, 1936. The estimated cost of new work, revised in 1943, is $5,400,000. Local cooperation.-Section 2 of the Flood Control Act approved June 28, 1938, applies.

Operations and results during fiscal year-New work.-Some preliminary work was performed consisting of miscellaneous engineering work. In addition, plans and specifications for public sanitary building, landscaping and parking area and surfacing of access road were completed. Clearing operations in the reservoir were continued, approximately 15 acres being cleared by hired labor. A cemetery was relocated under contract. Partial settlement was made for work performed by the owning agency in connection with a utility relocation. A 12-inch water line under the Alexandria Branch of the Pennsylvania Railroad was replaced under contract. In connection with the acquisition of land in the reservoir area, a total of 74.04 acres in fee simple and flowage easements over 4.92 acres were acquired during the year.

Maintenance (operating and care).-The reservoir was operated for the benefit of flood control, as required, and necessary repairs were made to the dam, and to operators' quarters and grounds throughout the fiscal year. In addition to ordinary maintenance and repairs to structures and plant, shop work was continued under contract in connection with construction of four new gate leaves, complete with seals, leaf seats and appurtenances, and repairs were made to four piston rods for the service gates under contract. The Ohio River at Pittsburgh was above flood stage three times during the year, and on four other occasions rises occurred which crested between 20 and 25 feet. The three largest floods, on February 28, March 4, and March 7, 1945, crested at 27.7, 26.9, and 33.4 respectively. Storage was made during each of these floods but as the intervals between floods were short, total release of the impounded water could not be effected until after the last flood. The reservoir water surface reached levels 25.2, 31.6, and 46.4 feet above the minimum pool on March 1, March 4, and March 8 respectively. The highest level reached during the year, on March 8, represents an impoundment of 45,100 acre-feet, or about 48 percent of the capacity available for flood control purposes. Results of reservoir operations in the reduction of flood stages at Pittsburgh, Pa., and Wheeling, W. Va., in combination with other units in the reservoir system are shown in the corresponding paragraph for Tygart River Reservoir. During the remainder of the year the reservoir acted as a detention basin with all gates left open except for several minor rises during which the emergency gates were closed and some water was stored and held until river conditions were such that it could be released.

The total costs were $80,831.34, of which $63,983.94 was for new work, and $16,847.40 for maintenance. The total expenditures were $83,708.32.

Condition at end of fiscal year.-The dam is complete and the reservoir is in operation as a unit in the reservoir system designed for the protection of Pittsburgh and the reduction of flood heights in the upper Ohio Valley, generally. All work necessary to the acquisition of land in the reservoir area is approximately 98.6 percent complete. The total acreage involved was acquired, and consists of 3,347.04 acres in fee simple and flowage easements over 78.92 acres. Work remaining to be done consists of preliminary work; completing settlement in connection with railroad relocation work performed by the owning agency under agreement with the United States; relocation of a number of highways and certain utilities in the reservoir area by agreement with the owning agencies and making settlement therefor; clearing of a few scattered parcels in the reservoir area; concluding work in connection. with acquisition of land; construction of a public sanitary building and storage building; and completion of landscaping, parking area, surfacing of access road and certain miscellaneous appurtenances to the dam.

The total costs to the end of the fiscal year were as follows: Regular funds:

New work

Maintenance

Total

Emergency Relief funds: New work

Total costs, all funds

$4, 494, 844. 20 83, 231. 48

4, 578, 075. 68 7, 338. 79

4, 585, 414. 47

The total expenditures were $4,582,031.92, of which $4,574,693.13 was from regular funds, and $7,338.79 was from Emergency Relief funds.

Proposed operations.-The balance unexpended on June 30, 1945, will be applied as follows:

The additional sum of $494,000 can be profitably expended dur ing the fiscal year 1946 or 1947 for completion of new work items. The further sum of $27,300 can be profitably expended during fiscal year 1947, as follows:

Maintenance-operating and care of dam: