Mo. Code Regs. tit. 10 § 30-4.060

Current through Register Vol. 49, No. 24, December 16, 2024

Section 10 CSR 30-4.060 - Traverse Survey Guidelines

PURPOSE: This rule prescribes the minimum procedures for first or second order traverse surveys.

(1) First Order Traverse Procedure.

(A) The location of first order traverse lines and monumented stations shall be determined by a thorough field reconnaissance. The traverse point spacing shall not be less than six hundred meters (600m).

(B) All first order traverse lines shall start from, and close upon, first order stations of the Missouri Geographic Reference System (MO GRS) or National Geographic Reference System (GRS) in accordance with these procedures.

(C) Properly maintained theodolites with a least count of one second (1") or a din rating of one and one-half seconds (1.5") or better shall be used to observe directions and azimuths. At least four (4) positions or repetitions of the angles shall be observed. The theodolite and targets should be centered to within two millimeters (2 mm) over the survey station or traverse point.

(D) Electronic distance measuring instruments shall be used to measure all distances. Electronic Distance Meter (EDM) instruments shall be tested on a DNR base line at the start and on the completion of any first or second order traverse. Copies of the EDM calibrations shall be provided to the department in the survey report. Barometric pressure to five millimeters (5 mm) and temperature to one degree Celsius (1^oC) shall be recorded for each measurement.

(E) Each traverse shall be tied to a minimum of two (2) bench marks. Trig. or spirit leveling will be observed along all traverse lines. All Hi's, HO's and zenith angles shall be recorded and submitted.

(F) The traverse shall be controlled by an astronomic azimuth at each end of the traverse line and at not more than every six (6) segments along the line. Astronomic azimuths shall have a standard deviation of one and one-half seconds (1.5") or better.

(G) All field data shall be submitted to Department of Natural Resources (DNR) in a format acceptable to the department. This shall include directions, distances, azimuth and elevations.

(2) Second Order Traverse Procedure.

(A) The location of second order traverse lines and monumented stations shall be determined by a thorough field reconnaissance. The traverse point spacing shall not be less than three hundred meters (300m).

(B) All second order traverse lines shall start from and close upon, second order or higher stations of the MO GRS or NGRS in accordance with these procedures or shall be run in closed circuits.

(C) Properly maintained theodolites with a least count of one second (1") or din of one and one-half seconds (1.5") or better shall be used to observe directions and azimuths. At least four (4) positions or repetitions of the angles shall be observed. The theodolite and targets should be centered to within two millimeters (2 mm) over the survey station or traverse point.

(D) Electronic distance measuring instruments shall be used to measure all distances. EDM instruments shall be tested on a DNR base line at the start and on the completion of any first order traverse. Copies of the EDM calibrations shall be provided to the department in the survey report. Barometric pressure to five millimeters (5 mm) and temperature to one degree Celsius (1^oC) shall be recorded for each measurement.

(E) Each traverse shall be tied to a minimum of (two) 2 bench marks. Trig. or spirit leveling will be observed along all traverse lines. All H1's, HO's and zenith angles shall be recorded and submitted.

(F) The traverse shall be controlled by an astronomic azimuth at each end of the traverse line and at not more than every eight (8) segments along the line. Astronomic azimuth shall have a standard deviation of two seconds (2") or better.

(G) All field data shall be submitted to the DNR in a format acceptable to the department. This shall include directions, distances, azimuth and elevations.

10 CSR 30-4.060

AUTHORITY: sections 60.451.3. and 60.461, RSMo 1986.* Original rule filed May 3, 1994, effective 12/30/1994.

*Original authority: 60.451.3, RSMo 1984 and 60.461, RSMo 1984.