All extra work done by the contractor was paid for and the contractors (both prime and completion) executed releases on the contracts at the time the final vouchers were paid. Therefore, no claims are pending against the Government for the Canyon Ferry unit. 120. Delays. Extensions of time were provided for both the prime and completion contractors when the delays were beyond the control and without the fault or negligence of the contractor. If the contractor was delayed as a result of a change in specifications requirements the time was extended in an order for changes. Other justifiable extensions of time were provided by findings of fact by the contracting officer in the matter of delay. It was the policy of both the prime and the completion contractor to request an extension of time whenever they believed there was just cause for it. However, it was only necessary to issue one findings of fact in the matter of delay in the completion of work under the prime contract and one findings of fact and one supplemental findings of fact under the completion contract. The contractors' requests for extensions of time were filed in the project office. After it was determined that the contractor needed an extension of time to avoid the assessment of liquidated damages by the Government, a draft of a findings of fact was prepared and transmitted to the contracting officer. (a) Prime Contract. Findings of fact by the contracting officer dated January 17, 1952, considered several alleged causes of delay by Canyon Constructors, but the circumstances justified an extension of time of only 18 calendar days. Facts determined that the delay was due to two causes, as follows: (1) Seven calendar days resulting from a requirement for removing forms and additional rock in block 13 of the dam after the excavation had previously been approved. (2) Eleven calendar days due to unusually severe weather conditions. (b) Completion Contract. Findings of fact in the matter of delay dated December 31, 1953, considered the delay to the completion contract resulting from a delay in receipt of Governmentfurnished materials. Under these findings, the contractor's time was extended until the ma 430593 O-58 12 terials were delivered. The findings provided that no liquidated damages would be assessed until supplemental findings of fact determining the extent of the delay were issued. Supplemental findings of fact dated April 5, 1954, extended the contract time 82 calendar days due to the delay in receipt of Government-furnished materials. 121. Supply Contracts and Other Construction Contracts. Contracts for the construction of associated works and for supplying major items of equipment costing in excess of $100,000 are listed in table 2. A number of smaller contracts were issued for construction and supply items costing less than $100,000. One small contract deserves special mention. After Canyon Ferry Dam had been in operation for a short time, high humidity developed in the galleries. In order to reduce this humidity a ventilating system for the galleries was installed under specifications No. DC-4420. The Caird Engineering Works was awarded the contract on June 21, 1955, at a total cost of $7,433.00. 122. Rights-of-Way and Government Camp. Almost the entire reservoir area was privately owned and composed mostly of grazing land. The Montana Power Company was the largest single landowner in the reservoir. The rest of the reservoir area was owned by a number of ranchers, except for a small number of Government and State land parcels. By contract and condemnation, 39,029 acres of land were acquired for the reservoir and Government camp. Land for the reservoir was acquired only to the maximum pool elevation of 3800 plus a horizontal strip 300 feet wide beyond without regard to elevation. Relocation of a county road to go through the Government camp near the dam site, the first work started on the project, began on October 6, 1947. Soon after this, contracts were awarded and work went forward on streets, sidewalks, gutters, drainage, sewerage, a water supply and distribution system, and the electrical distribution system. The camp is on the right side of the reservoir about 0.8 mile northeast from the dam. The camp consists of an office building, a combination dormitory and office building, a garage and shop, eight 4-room residences, seven 5-room residences, three 6-room residences, fourteen 4room prefabricated residences, a testing laboratory building, six warehouse buildings, 10 trailer houses, a school and teacherage, a wash house, and seven movable trailers. Views of the Government camp housing are shown in figures 85, 86, and 87. The schoolhouse basement is used as a community meeting hall. Eight 4-room, four 5-room, and three 6-room residences have basements and attached garages. The teacherage has a basement but no garage, and none of the other residences have garages. Residences are heated with fuel-oilfired furnaces or fuel-oil space heaters except for the trailer houses. These are heated with electric space heaters. All of the residences except the trailer houses, trailers and prefabricated houses, and office buildings will be used by operation and maintenance personnel. Streets in the Government camp are paved with bituminous paving. The warehouse buildings and the laboratory buildings are of prefabricated sheet metal. The garage and shop buildings are of concrete construction, and all other Government buildings are of wood-frame construction. Construction of the camp was largely by contract, except for the sheet metal laboratory building which was erected by Government forces. 123. Cost Summary. The total cost of Canyon Ferry Dam and Powerplant as of November 15, 1956, on the basis of completion reports submitted by the project office, is $28,772,465, as shown in the following tabulation. All major facilities were completed at that date, but additional expenses, mostly chargeable to the dam and reservoir, are expected to bring the final construction cost to about $29,145,000. The total cost of construction contracts was $17,553,000. Dam and reservoir. Powerplant Switchyard Direct costs 980,000.00 Ideal Cement Co. $15,520,824 6,013,812 Permanent camp. 495,235 Temporary camp.. 628,312 DS-3519 Furnishing power circuit breakers. 122,370.00 General 301,346 Subtotal Electric Co. 22,959,529 1From Summary Cost and Progress Report, September 30, 1956. Figure 85. View of Government camp showing duplex housing units and a small park area in right foreground. P-120, June 25, 1948. Figure 86. View of the temporary Government camp area showing partially completed prefabricated houses. P-138, July 28, 1948. Figure 87. Trailer houses in Government camp. Note landscaping done by tenants. P-174, September 28, 1948. The office engineering personnel prepared drawings, maps, charts, contractors' monthly estimates, special and routine reports, final estimates, annual project histories, some programs documents, drafts of extra work orders, orders for changes, and findings of fact, and maintained the project engineering files. The office engineering personnel made stress analyses of construction loads, also obtained costs for contract adjustments, checked escalation payments, composed technical correspondence as required, coordinated the procurement of Government-furnished materials and equipment with the contractors' construction and installation schedules, and secured and compiled information on contractors' construction costs. Detailed reinforcement drawings were prepared for all galleries, shafts, and openings in the dam. A total of 650 formal drawings were made. At the peak of construction, the office engineering force numbered about 13 including the office engineer. Clerical and fiscal requirements of the Canyon Ferry unit were managed by an administrative officer and 10 employees. The administrative services division included an office branch, warehouse branch, and camp operations branch. The office branch maintained personnel records and handled personal services, local purchasing, and typing services. The warehouse branch received, checked, issued, and maintained records of the materials and equipment furnished by the Government to the contractor. The maintenance of the Government camp and the Government vehicles was a responsibility of the camp operation branch under the administrative officer. The maintenance of buildings and utilities and necessary minor repair work was accomplished by two employees. If repairs were required that were too complex for the camp man and janitor, specialists from Helena firms were hired. No Government wage-hour employees were involved in the construction of Canyon Ferry Dam, Powerplant, Government camp, or appurtenant works. Wage-hour employees were used for maintenance of the Government camp and vehicles only. The total number of Government employees at Canyon Ferry was about 70 during the period in which both major contracts were active. This number varied as the workload required and some employees were detailed to other projects during slack seasons. During the winter months when the prime contractor was not working, field employees were used in the office engineer ing division to bring reports and drawings up to date. 125. Surveys. When construction work started on the dam and powerplant in 1949, a survey section was established to perform survey work under the field engineering division. The survey section consisted of one chief of surveys and two 5-man survey parties. In addition, there were two survey men concerned only with the measurement of materials for which the contractor was to be paid. The first work performed by this section was to obtain original cross sections of the dam and powerplant area, including the river channel. These were taken on 5-foot stations through the dam and powerplant area, then on 10-foot stations for 1,000 feet upstream and downstream of the dam axis. During the winter of 1949, when the river was entirely frozen over, base lines were established on each bank. A graduated wire was stretched across the river and holes were chopped through the ice to measure the depth of the water and obtain the elevation of the bottom of the channel. Setting of monuments for triangulation work was started in May of 1949 and continued through the following July. This work consisted of chaining three baselines using precise tape, turning all angles with a theodolite, and computing coordinates of all triangulation stations in the quadrilateral system for block line control in the dam and powerplant area. These coordinates were given in "A" and "B" stations corresponding to any given station for the dam and powerplant. "A" stations ran along the axis of the dam from the left abutment to right abutment. "B" stations started with zero being 1,000 feet upstream from the axis and increased in a downstream direction. The axis was "B" station 10+00. Targets were then set from these triangulated stations for block alinement control on high blocks only, 1 foot inside of the block line, on "A" stations. "B" station targets were set on the right and left abutments at station 10+02, or 2 feet downstream from the axis. These were the major "B" station controls throughout construction. Alinement and stationing were established for layout of the block, from within the block. During the first part of construction, "A" targets were set on the sheet piles in the cofferdams. These were checked and adjusted frequently. However, their use was limited, as targets could not be used with accuracy over 1,000 feet upstream and downstream of the axis. After the cofferdams were removed, intersections were located between triangulation stations and "B" station 10+02 to establish stations in the blocks, and block lines were then measured from these intersections. Slope stakes were set for the dam, powerplant, and spillway excavation. As the excavation progressed to final grade, block lines, batter lines, and an axis mark were painted on the rock for quick reference. A file card system was set up in the survey field office to file construction drawings as they were received, and as each drawing was received all items shown on the drawing were entered in a "pour" book. The pour book was a tabulation of all items shown on the plan of elevations, including the block number, the drawing number, and a brief description of the item. From this pour book, a pour sheet was tabulated which showed all of the items required for installation before the concrete could be placed. From the pour sheet, the checkout engineer could be certain that all items were in place and what materials would require measurement. From the pour book tabulation, fill cards were laid out, to be used by the survey layout crew to set points in any given block, before the contractor set his forms, pipe, or any other item to be embedded in the concrete. Four copies of these fill cards were made for each pour. One copy was given to the layout crew to set the points and note the fills to the top of the pour. This copy was returned to the field office where the data were entered on the original and copies. Two copies were then issued to the contractor. One copy was retained in the file in the field office, and one copy was issued to the checkout engineer for checking out the form, and for setting and measuring embedded material. The survey section was also responsible for measuring and submitting the pay quantities of embedded material. For this purpose, a material book for each block was prepared in advance from the pour book showing the quan |