The project will also reduce pumping lifts for irrigation developments along the reservoir shoreline and will provide incidental recreation benefits. Fiscal year 1965.-The amount of $13 million will be applied to- Initiate relocation of roads_. Initiate construction of dam, lock, and powerhouse_- Continue manufacture of powerplant and other equipment. The funds requested for fiscal year 1965 are required for orderly construction progress to meet scheduled power-on-the-line and completion dates. Non-Federal costs.-Costs allocable to power, presently estimated at $106,- Status of local cooperation.-None required for construction. Power rates established by Bonneville Power Administration will assure repayment of costs allocated to power as required by Federal laws. Comparison of Federal cost estimates.-The current Federal (Corps of Engi- neers) cost estimate of $150 million is an increase of $4 million over the latest Location. On the Snake River at the head of the Ice Harbor pool, river mile Type: Concrete gravity with earth and rockfill abutments. Height: 135 feet (above streambed). Length: 3,800 feet (including abutments, spillway, navigation lock, and powerhouse). Spillway: Type: Gate controlled with stilling basin. Capacity (maximum pool): 850,000 cubic feet per second. Gates: (8) 50 by 61 feet taintor. Relocations: Union Pacific RR.. Northern Pacific Ry. Camas Prairie RR. County roads___ Reservoir capacity: Total storage at elevation 540_. Power (elevation 540-537). Navigation, powerhead, and incidental recreation (below elevation 537)--- Power installation: Uultimate: 6 units, at 135,000 kilowatts: 810,000 kilowatts. Initial: 3 units, at 135,000 kilowatts; 405,000 kilowatts. Miles 29 31 9 13 Acre-feet 376, 000 20,000 356, 000 Percent complete 67 55 June 1968. June 1968. December 1967. Do. Do. March 1968. 3 units, 135,000 kilowatts each, December 1967. JUSTIFICATION The project is an essential unit in the authorized slack-water navigation and hydroelectric power development of the lower 360 miles of the Columbia River and the lower 140 miles of the Snake River. The Bonneville Power Administration advance program, 1963-73, and its supplement dated May 16, 1963, indicate that with Canadian storage, Lower Monumental and all presently scheduled resources will be required, under critical water conditions, to meet the 1968-69 load of the west group of the Northwest Power Pool. Without Canadian storage, Lower Monumental is required as scheduled in addition to all existing high cost thermal generation to meet the 1967-68 load. It is essential that power be available for industrial and other developments necessary to maintain the economic growth of the region. The project will provide continuation of slack-water navigation development, with authorized depth of 14 feet for 29 miles from the damsite at river mile 41.6, the head of the Ice Harbor pool, to river mile 70.3, the site of the Little Goose lock and dam. Estimated average annual commerce on and through the pool is 2,744,000 tons at a transportation saving of $1,600,000. Principal commodities would consist of wheat, wood products, ores, petroleum, and fertilizers. Realization of the complete navigation benefits requires completion of all four of the lower Snake River projects (Ice Harbor, Lower Monumental, Little Goose, and Lower Granite). The project will also reduce pumping lifts for irrigation developments along the reservoir shoreline, and will provide incidental recreational benefits. Fiscal year 1965.-The requested amount of $37,500,000 will be applied toContinue acquisition of lands_. Continue relocations.. Continue construction of dam, lock, and fish facilities. Initiate construction of powerhouse and continue procurement $294, 000 13, 075, 000 8, 413, 000 11, 703, 000 1, 405, 000 600,000 2,010,000 37, 500, 000 The funds requested for fiscal year 1965 are required for orderly construction progress to meet scheduled power-on-line and completion dates. Non-Federal costs.-Costs allocable to power, presently estimated at $137,361,000, are reimbursable. Status of local cooperation.-None is required for construction. Power sales administered by Bonneville Power Administration will assure repayment of costs allocated to power as required by Federal laws. Comparison of Federal cost estimates.-The current Federal (Corps of Engineers) cost estimate of $176 million is an increase of $14 million from the latest estimate ($162 million) submitted to Congress. This change includes $3,187,000 for higher price levels, $8,457,000 based on more detailed planning of construction and relocations, and $2,356,000 in "Engineering and design" and "Supervision and administration" due to recent reanalysis of requirements. Summary construction program (PB-1), fiscal years 1964 and 1965 Item (1) $539,600 $814, 300 7,074, 500 2, 636, 700 Budget fiscal year 1965 $294,000 13, 074, 500 Balance to complete after fiscal year 1965 (6) $170, 100 37, 841, 000 215,000 3,089, 900 Total to Current fiscal year 1963 1964 (3) (4) (5) 1,016, 800 8, 147, 100 672, 700 1, 159, 700 439,000 1,589, 500 4,813, 200 2, 009, 300 11, 702, 600 1,898, 400 5,605, 300 34, 390, 400 137,000 742, 000 614,000 175, 700 708, 500 1,715, 800 1, 200, 000 2,010, 000 5, 020, 200 91, 034, 700 COLUMBIA RIVER AT THE MOUTH (NORTH AND SOUTH JETTIES AND PILE DIKES), OREGON AND WASHINGTON (Continuing major rehabilitation) Location and description.—At the mouth of the Columbia River. The project consists of the rehabilitation of the north and south jetties and repairs to pile dikes 5.15, 4.47, and 4.01 on Sand Island. The south jetty was originally constructed during the period 1885-1895. Reconstruction and extension of the jetty was started in 1903 and completed in 1913. As then completed it extended 21,100 feet with a top elevation of 24 feet above mean lower low water. From 1931 to 1936 rehabilitation work was completed to 24 feet about mean lower low water to within 3,300 feet of the end of the jetty. To prevent raveling, a solid concrete terminal block was constructed in 1941 to about station 176 or 3,500 feet shoreward of the outer end of the jetty as constructed in 1913. The north jetty was constructed during the period 1913-1917 to a length of approximately 13,200 feet. It was rehabilitated in 1938 and 1939 with a concrete terminal block constructed at the turn in alinement, about 1,700 feet from the outer end. Pile dikes 5.15, 4.47, and 4.01 on Sand Island were constructed in 1933, 1934, and 1934, respectively, and repaired in 1951, 1955, and 1954, respectively. Authorization.-1884 and 1905 River and Harbor Acts. Present condition.-Rehabilitation of the south jetty from station 93 to 157+50 is under contract. There are several low sections in the south jetty between station 157+50 and the concrete block that are below midtide level. A large volume of rock has been displaced from the south side of this part of the jetty and the exposed smaller core material will tend to erode at a faster rate. The top of the 3,500 foot part of the jetty beyond the concrete cap is now at an elevation that varies between 14 and 20 feet below mean lower low water. The south jetty terminal block is being undermined and is partly broken. Scour along the toe of the north jetty has caused subsidence and loss of much of the armor stone. Smaller core stone is now exposed to high ebb velocities and ocean waves. The concrete terminal block and about 4,500 feet of jetty shoreward of the concrete block have sustained damage due to subsidence and wave action along the south side. Although the terminal block has subsided to approximately 8 feet above mean lower low water, it is still in one piece. However, the jetty shoreward for about 150 feet has been destroyed to an elevation below mean lower low water. Heavy wave action during winter storms and accumulated drift and debris during the flood season cause extensive damage to pile dikes on Sand Island. It is planned to repair each dike to within 50 feet of the beach. Rock revetment will be added to stabilize the beach section shoreward of the dikes and the opening will permit passage of debris and reduce damage that is caused by accumulation of debris. Traffic during calendar year 1962 totaled 12,651,633 tons as compared to the 10-year average tonnage of 11,530,000. The tonnage was composed of petroleum products and ores inbound and forest products, flour, wheat, and other grains, outbound. During 1962 foreign exports totaled 4,746,877 and imports 983,806 tons. The commercial fishing fleet operates through this reach on a daily basis whenever weather permits. During the summer, thousands of recreational craft also utilize the protection afforded by the facilities. Rehabilitation of the contraction work will reduce the hazards to all types of vessels and will aid in maintenance of the channel at the mouth of the Columbia. Fiscal year 1965.-The requested appropriation of $1,500,000 will be applied as follows: Initiate rehabilitation of north jetty--- Initiate and complete rehabilitation of Sand Island dikes......... Supervision and administration_.. Total $1,076, 000 316, 000 25, 000 83,000 1, 500, 000 |