Current through Register Vol. 50, No. 9, September 20, 2024
A. Field
Notebooks. Field notebooks shall be carefully and neatly prepared, identified,
indexed and preserved. All data regarding the establishment and extension of
horizontal and vertical control, including descriptions of all established and
recovered monuments, shall be recorded. Where existing control monuments are
recovered in extending the basic control, the field notebooks shall contain the
following:
1. recovery descriptions of all
monuments recovered. Descriptions will be prepared on the Report on Condition
of Survey Mark Form included under §525, Appendix C;
2. exact letter and numbers stamped (not cast
in) on the mark and amended description, if applicable;
3. additional reference tie data, if
any;
4. a sketch of the location of
the monument as appropriate to facilitate future recovery. The field notebooks
shall contain the name and address of the party chief, the identity of the
survey instruments or equipment, and the latest calibration dates of all
instruments and equipment. Each field notebook shall be numbered and marked
with a brief description of the contents on the cover, shall be carefully
indexed, and shall have all pages numbered. Each horizontal baseline loop and
vertical control line shall be identified by number and brief description in
the field book. The first page used on each day of fieldwork shall be dated.
Upon completion of the project, all field books shall be delivered to the
responsible contracting authority.
B. Control Data. The following information
shall be furnished on all new permanent control monuments and/or temporary
photogrammetric control points established:
1. information required on control points
established to be furnished on control data description forms as shown in §527,
Appendix D;
2. designation of
control point (parish name and sequential identification number);
3. name of party responsible for establishing
control point;
4. date of
establishment:
a. horizontal and/or vertical
control data;
b. complete
description of the nature and location of the point to include a "to reach"
description referenced to nearby landmarks and identified by field survey ties
to three or more definable photo image points or established reference points
in the immediate vicinity.
C. Computations. All computations and
adjustments of control data shall be referenced to the field notebooks by book
and page number. Following completion of computations and adjustments, a copy
of the following data shall be submitted to the responsible contracting
authority for all horizontal and vertical control established:
1. individual horizontal baseline loop
sketches showing designation of monuments or control points established,
designation of existing published monuments and azimuth marks occupied,
recorded and reduced average distances and angles measured, error of closure
tolerances, astronomic observation measurements and computations, and related
information;
2. horizontal baseline
loop adjustment computations showing both unadjusted and adjusted bearings,
distances and coordinate positions of control points established, sea level and
scale factor corrections applied in conformance with Louisiana conformal conic
projection requirements, unadjusted coordinate positions of all existing
published control monuments and azimuth marks, and designation of both
constrained and check verification monuments used in adjustment;
3. individual vertical level loop sketches
showing designation of control points established, designation of existing
published benchmarks occupied, error of closure tolerances, level line loop
adjustment computations showing both unadjusted and adjusted elevations,
unadjusted elevations of all existing published benchmarks, and designation of
both constrained and check verification benchmarks used in
adjustment;
4. summarized
tabulation of all adjusted horizontal control monument and photogrammetric
target coordinate locations reduced to the nearest 0.01 feet and 0.001 meters
(northing and easting) based on the Louisiana State Plane Coordinate System
(north or south zone, as applicable);
5. summarized tabulation of all established
vertical control elevations reduced to the nearest 0.01 feet and 0.001
meters.
D. Control
Diagram. The surveyor shall furnish with the survey records a schematic control
diagram prepared on USGS Topographic Quadrangle Map Sheets, 7.5 Minute Series,
showing all basic horizontal and vertical control established. This diagram
shall show all existing and established control points properly identified in
their approximate location, including all primary survey baselines and their
connections to existing and established control point locations.
AUTHORITY NOTE:
Promulgated in accordance with
R.S.
50:171.
