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State of Washington Classified Job Specification


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Class Code: 538S
Category: Science & Engineering


This is the semi-skilled, intermediate developmental level within the Transportation Technician series.

Distinguishing Characteristics

In addition to basic duties, incumbents perform semi-skilled technical work and receive on-the-job instruction, classroom training and self-study courses in order to develop journey level knowledge of technical engineering principles and practices. To facilitate development, incumbents perform a variety of well-defined technical support activities in the office, laboratory and/or field. Incumbents receive instructions about the work to be done, ongoing technical guidance and their work is reviewed upon completion. Independent assignments are limited to those requiring the routine application of well established standards. As employees develop, they are expected to solve a limited range of problems by referring to prior training, manuals and procedures while moderate problems are referred to superiors. Leadership of others is limited to training of beginning technical staff. Over time, incumbents grow to independently perform a broad range of semi-skilled technical duties and, under supervision, begin to perform journey level work.

Typical Work

In addition to performing the work described at the Transportation Technician 1 level, incumbents perform the level of work described below a majority of the time. This description is not intended to be all inclusive but representative of the level of responsibility and level of difficulty of the work performed by this class.


  • Serves as a survey party member; operates level, chain, rods and prism poles on a variety of survey projects; learns to use transit, theodolite, EDM, total station and other survey instruments and serves as back-up instrument operator; holds and sets targets and backsights; marks and sets stakes, hubs and laths; compiles level and transit notes manually or with data collector, learns to download and upload data collector to/from computer, and reduces information into useable data using personal computer; from field notes, assists in plotting cross sections, contours, profiles and grade elevations using electronic plotter; assists in the computation of field notes and miscellaneous calculations for curve data, triangulations, bench marks, grades, etc.


  • Serves as a field inspector who collects materials samples, learns to proficiently perform a variety of job-site tests, records test data and interprets test results; performs soils tests such as proctor density; performs aggregate tests such as sieve analysis, sand equivalent and moisture content, operates nuclear densometer and serves as a crushing plant inspector; performs concrete tests such as yield, slump and air entrainment, casts cylinders or beams, and learns to inspect at a concrete plant; performs asphalt mix tests such as extraction and maximum density, operates nuclear densometer and learns to inspect at an asphalt plant.
  • Serves as a laboratory materials tester in a District or Headquarters quality assurance program; receives and logs in materials samples; prepares materials for testing; learns to proficiently conduct semi-skilled materials tests such as sieve analysis, sand equivalent, plasticity index, specific gravity, Los Angeles abrasion, degradation asphalt mix density, asphalt mix stability, maximum specific gravity of asphalt mix; asphalt content by extraction, penetration, viscosity, ductility and consolidation; prepares asphalt concrete mixes; performs asphalt recovery from solution; conditions moisture susceptibility asphalt concrete test specimens, prepares Portland Cement concrete mixes, makes cylinder and beam specimens; tests for slump, air content and unit weight; determines compressive, flexural and tensile strength of concrete and tensile strength of steel; completes worksheets, control sample forms and daily reports; computes and interprets results from above tests; maintains and calibrates basic testing equipment; assists in maintenance chores and lab clean-up.


  • Serves as an assistant inspector on highway construction to ensure projects are constructed according to plans and specifications; learns to independently inspect minor phases of construction projects such as clearing, fencing, guardrail, curb, gutter, sidewalks, median barrier, illumination, landscaping, mulching, seeding, irrigation systems, simple surface drainage, small culverts, extension of small drainage structures and slope flattening; assists in the inspection of earthwork, surfacing and paving by weighing trucks, receiving and totaling tickets, calculating yield, monitoring depth and placement, performing the field materials tests listed above, ensuring correct thickness of lifts, proper watering and rolling, performing nuclear density tests to monitor compaction of embankments, surfacing and backfill; on bituminous surface treatments, inspects rock, samples oil and tests compaction; lays out grinding and operates a profilograph; assists in the inspection of bridge deck repair by marking deliminated areas, overseeing chipping, inspecting forms and rebar; assists in inspection of bridges and structures including performing concrete tests, checking number and placement of rebar, depth and placement of concrete, dimensions and alignment of forms, checking bolt location, bearing and torque; takes measurements and calculates quantities; completes daily records, force account sheets and other documentation.


  • Performs a variety of semi-skilled construction office engineering tasks; assists in checking inspector's calculations and field note records; compiles information; checks entries into the ledger system; assists in checking inspector's daily force account sheets, calculates equipment and wage rates; monitors contractor's payroll, wage and EEO submittals; learns to run preestimate and monthly estimate reports; assists in calculation of final quantities and final estimate; assists in checking final record notes and compiling final records; assists in writing project histories; reduces field notes and calculates elevations, cuts and fills; computes and plots cross sections and grades; drafts plans, profiles and "as-builts."
  • Performs a variety of semi-skilled project development support tasks; manually or by using computer assisted design/drafting equipment; traces, rearranges, rescales plan sheets, produces routine original plan sheets from basic data supplied by the designer, drafts and/or revises right of way plans, paving plans, planting and irrigation plans, base maps, vicinity maps, contour maps, profiles, etc.; details simple structures and portions of complex structures; reduces field notes; computes and plots cross sections, alignment, roadway sections; uses calculator and/or computer to calculate or check calculations for cuts, fills, areas, quantities, elevations, grades, coordinates and curves; codes and inputs data for routine programs to determine alignment, profiles, quantities and cost estimates; compiles data and prepares various materials such as charts, graphs, sketches, maps, diagrams, and exhibits; reproduces prints.


  • Participates in various traffic studies such as speed studies, ball bank studies, traffic counts, measurement of sight distances and curves, hazard identification and accident analysis; assists in compiling data, drawing supporting sketches and preparing reports; maintains District sign inventory; assists in layout and review of no-passing zones.


  • Supplements maintenance staff during snow and ice control season; loads trucks from stockpiles or pits; operates Class A trucks to salt, sand, and/or plow roadways; cleans ditches of debris and dirt with a hand shovel or mechanical equipment to ensure proper drainage; removes rocks, debris, etc., from roadway.

Performs other work as assigned.

Legal Requirement(s)

There may be instances where individual positions must have additional licenses or certification. It is the employer’s responsibility to ensure the appropriate licenses/certifications are obtained for each position.

Desirable Qualifications

An Associate degree in Civil Engineering Technology, surveying, drafting or other closely related fields.


Completion of an accredited vocational/technical program consisting of at least 1,200 instructional hours in Civil Engineering Technology, surveying, drafting, structural detailing, engineering design or other closely related fields.


Graduation from high school or GED equivalent and two years of experience performing basic technical engineering work as a Transportation Technician 1 or equivalent.  (College level or vocational/technical course work in engineering, drafting, survey, mathematics or other closely related fields will substitute for the required technical engineering experience on a year-for-year basis.)


Three years of experience as a Maintenance Technician, one of which must be as a Maintenance Technician 2.

Note:  Possession of a valid driver's license may be required. 

Note:  Employees will be advanced to Transportation Technician 2 after:

  1. Completing two years of satisfactory service as a Transportation Technician 1; and
  2. Successful completion of the WSDOT's mandatory training matrix for automatic promotion to the Transportation Technician 2 class; and
  3. Passing a qualifying examination.

Class Specification History

New class: Adopted 7-13-78; Effective 10-1-78
Revised minimum qualifications (course work substitution for experience): 4-13-79
Revised definition, distinguishing characteristics, minimum qualifications: 4-10-81
Revised distinguishing characteristics: 5-9-86
Revised minimum qualifications: 12-14-90
Revised definition, distinguishing characteristics, minimum qualifications: 3-13-92
Revised minimum qualifications: 1-12-96
Revised minimum qualifications: 9-10-99
Revised new class code: (formerly 66080) effective July 1, 2007.
Base range salary adjustment adopted 6/30/2017, effective 7/1/2017.