Section I. RECONNAISSANCE SURVEY
The reconnaissance survey is an extensive study of an entire area that might be used for a road or airfield. Its purpose is to eliminate those routes or sites which are impractical or unfeasible and to identify the more promising routes or sites
Section II. PRELIMINARY SURVEY
The preliminary survey is a detailed study of posed route, establishes levels, records topoa route tentatively selected on the basis of graphy, and plots results. It also determines reconnaissance survey information and recom- the final location from this plot or preliminary mendations.
Section III. FINAL LOCATION SURVEY
Prior to the final location survey, office make any changes without the authority of studies consisting of the preparation of map from preliminary survey data, projection of a tentative alignment and profile, and preliminary estimates of quantities and costs are made and used as guidance for the final location phase.
Section IV. CONSTRUCTION LAYOUT
The construction layout is an instrument survey. It provides the alignment, grades, and locations which guide the construction operations. The construction operations include clearing, grubbing, stripping, drainage, rough grading, finish grading, and surfacing.