Hydrography for causeway locations was completed at five locations, Secondary control stations for the location of submarine cable were established from Eniwetok to Bogallua around the easterly perimeter of the lagoon. These were established by intersection angles from a craft in the lagoon between kmown stations and the stations to be located. Existing navigational aids were located. Some stations that had been destroyed were reestablished, and the locations of new navigational aids set as a requirement of this Project were located, By use of these controls all submarine cable was located from the cable laying barge as the work progressed. CONSTRUCTION STAKING Standard methods of construction staking were followed. Building and special structure corners were established by offset stakes at the corner, and bench marks were provided, Utilities were staked on offset lines, with required cuts and fills provided at necessary intervals. Grades were provided as required for area improvement and roads. and grade were provided for pier and causeway construction. Line The volume of construction staking was considerably greater than anticipated and, in the final stages, accounted for most of the man-hours worked by survey personnel, A major problem was that in many cases plans were not received sufficiently in advance of actual construction to allow time to make up staking sketches to simplify the field work. Also, revisions which arrived after initial staking required additional field work, Relations between the survey and construction forces were generally good and resulted in good planning in the use of construction equipment and the scheduling and accomplishment of the work of both departments. AS-BUILT SURVEYS Where construction deviated from approved plans, surveys recording changes were made by the Survey Department. Considerable difficulty was experienced in making these surveys because field changes were often made without the knowledge of the Survey Department. This resulted in field construction problems as well as in increased survey costs. It is recommended that in future projects no construction be under- taken without clearance or location by the Survey Department, for the survey personnel are in a position to know whether proposed field construction will conflict with work in place or to be constructed. This is particularly important for underground construction. LOCATION OF SUBMARINE CABLE The inter-island submarine cable was located as laid, and cable iocation charts were plotted from this information. 5-68