2.1 Professional Engineers Act: Engineering Surveying

Professional Engineers Act: Engineering Surveying

Quick Answer: Business and Professions Code (BPC) 6731 defines civil engineering as studies or activities in connection with a listed set of fixed works, plus city and regional planning insofar as those features. BPC 6731.1 then grants engineering surveying: (a) alignment or elevation of those fixed works; (b) configuration or contour of the earth and positions of fixed objects by trigonometry or photogrammetry; (c) electronic or computerized data for (a) and (b); and (d) a statement regarding the accuracy of maps or measured survey data from (a)–(c). Staking a highway alignment is (a). A total-station site topographic survey is (b). Editing a surface TIN is (c). Signing a map-accuracy statement on grading-plan topography is (d).

The 2022 Civil Engineering Surveying (CES) test plan lists Domain I, knowledge item H, as the role and limitations of a civil engineer as it pertains to engineering surveying. That item is a scope question. This section teaches the two Professional Engineers Act sections that draw the line: 6731 (what civil engineering is) and 6731.1 (what engineering surveying a civil engineer may practice). Section 2.2 adds the pre-1982 land-surveying grandfather and BPC 6731.2 procurement. Section 2.3 adds Board Rules and Subdivision Map Act context.

Why 6731 comes before 6731.1

You cannot apply 6731.1(a) unless you know what a fixed work is. Section 6731 does not define civil engineering as anything a civil engineer might bill. It lists the works, then lists professional activities performed in connection with those works.

The 6731 fixed-works list

Civil engineering embraces studies or activities in connection with fixed works for irrigation, drainage, waterpower, water supply, flood control, inland waterways, harbors, municipal improvements, railroads, highways, tunnels, airports and airways, purification of water, sewerage, refuse disposal, foundations, grading, framed and homogeneous structures, buildings, or bridges.

Treat the list as civil infrastructure plus site and structural works. A highway centerline, a sewer trunk, a detention basin, a runway, a building pad, and a bridge abutment are on the list. A lot line, a U.S. Public Land Survey System (USPLSS) section corner, and a title easement are not on the list.

Civil engineering also includes city and regional planning insofar as any of the above features are concerned therein. That sentence is planning of civil features (streets, drainage, water, sewer), not a grant of cadastral surveying and not a grant of land-use law practice.

The 6731 activity list (a) through (g)

In connection with those fixed works, civil engineering includes the following professional activities:

6731(g) is design-side electronic data: CADD of the improvement plans, quantity takeoffs, structural models. 6731.1(c) is surveying-side electronic data: a TIN, an alignment geometry file, a contour drawing for the surveying acts in 6731.1(a) and (b). Do not collapse the two.

The last paragraph of 6731 — civil engineers registered prior to January 1, 1982, may practice all land surveying as defined in the Professional Land Surveyors' Act — is a license-status rule. It is not how a typical CES candidate practices. Section 2.2 covers that limit. Do not read the grandfather into 6731.1.

BPC 6731.1 in full: engineering surveying

Civil engineering also includes the practice or offer to practice, in a public or private capacity, all of the following. Offering the work is regulated, not only performing it. A city engineer staking municipal improvements and a private-practice engineer staking a site grading plan both work under 6731.1 when the task fits.

6731.1(a) Alignment or elevation of 6731 fixed works

The civil engineer locates, relocates, establishes, reestablishes, or retraces the alignment or elevation for any of the fixed works embraced within 6731.

Read every verb. Locate and establish cover original layout of a designed centerline or grade. Relocate and reestablish cover resetting a construction line that was destroyed. Retrace in this subdivision means retracing the engineering alignment or elevation of a fixed work, not retracing a deed line.

Alignment here is surveying vocabulary: the horizontal path of a highway, railroad, pipeline, channel, or runway. Using that word for a road centerline is required technical language. It is not a claim about any exam sponsor. Elevation is the vertical path: profile grade, invert, pad elevation, or finished floor.

Exam-style scenario — (a), horizontal. A city has approved improvement plans for a new arterial. The civil engineer occupies control, computes stationing along the design centerline, and sets hubs and tacks for the contractor. That is locating and establishing alignment of a highway, a 6731 fixed work.

Exam-style scenario — (a), vertical. The same crew sets blue tops to the finished subgrade profile. That is establishing elevation of the same fixed work.

Exam-style scenario — (a), other fixed works. Resetting a destroyed sewer invert grade stake is reestablishing elevation of a sewerage work. Staking a building-pad elevation is establishing elevation for grading, foundations, or buildings. Setting the centerline of a flood-control channel from the approved plans is alignment of a flood control work.

A trap: the statute uses retraces. A question that says retrace the rear property line of Parcel 12 from the 1954 deed is not 6731.1(a). Property boundaries are land surveying under the Professional Land Surveyors' Act. The verb retrace does not convert a deed line into a 6731 fixed work.

6731.1(b) Configuration, contour, and positions of fixed objects

The civil engineer determines the configuration or contour of the earth’s surface, or the position of fixed objects above, on, or below the surface of earth, by applying the principles of trigonometry or photogrammetry.

Three products live here:

1. Configuration or contour — a topographic surface: ground shots, breaklines, contours, a digital terrain model.
2. Positions of fixed objects — buildings, curbs, utility poles, manholes, invert elevations, bridge decks, trees used as site constraints.
3. Above, on, or below — aerial mapping of rooftops, terrestrial shots of ground features, and underground utilities located as positions of fixed objects (the engineering location, not ownership of a title easement).

The method language is trigonometry or photogrammetry. A total station is a trigonometric instrument: it measures angles and distances and computes positions. Aerial mapping is photogrammetry. Other modern collectors (GNSS topography, LiDAR-derived surfaces) still serve the same statutory purpose: determine configuration, contour, or object positions for civil design. Later CES domains test field methods; 6731.1(b) is the practice authority, not the instrument catalog.

Exam-style scenario — (b). A total-station topographic survey of a two-acre grading site, including building corners, curb, and storm inverts, is 6731.1(b). You are determining contour of the earth and positions of fixed objects by trigonometry.

Photogrammetry of a corridor for highway or flood-control design is also (b). That flight does not establish fee title of adjoining owners.

As-built distinction. If you are setting or checking the design grade of a bridge, you are in 6731.1(a) (elevation of a 6731 bridge). If you are mapping an existing deck as a site constraint for another design, you are in 6731.1(b) (position of a fixed object). Many as-built jobs include both: you occupy the structure as a fixed object and you also confirm design elevations of the work you are constructing.

6731.1(c) Electronic or computerized data for (a) and (b)

The civil engineer creates, prepares, or modifies electronic or computerized data in the performance of the activities described in subdivisions (a) and (b).

This is the CADD, GIS-as-a-surface, and survey-software layer of engineering surveying:

• Importing raw observations and reducing coordinates
• Building or editing a TIN or other digital terrain model
• Draping contours and adding curb or flow-line breaklines
• Storing a design alignment geometry file (horizontal and vertical) for staking
• Editing the surface after a field check

Exam-style scenario — (c). After the topographic survey, the engineer edits a surface TIN, adds curb breaklines, and regenerates 1-foot contours for the grading plan. That modification of computerized surface data is 6731.1(c), performed in support of (b).

Building a staking alignment file from approved highway plans is 6731.1(c) in support of (a).

A trap: editing a GIS parcel fabric or rotating a subdivision boundary to fit the topo is not 6731.1(c). Subdivision (c) is limited to data for (a) and (b). It is not a back door into cadastral drafting.

6731.1(d) Accuracy statements for those maps and measurements

The civil engineer renders a statement regarding the accuracy of maps or measured survey data pursuant to subdivisions (a), (b), and (c).

This is the authority to say, on an engineering topographic map, grading exhibit, or as-built of a fixed work, how accurate the measured data and map are. It is not authority to certify title, to certify that a final subdivision map is technically correct under the Subdivision Map Act, or to issue an ALTA/NSPS land-title certification.

Exam-style scenario — (d). The engineer signs a note on the grading-plan topographic map stating the contour interval, the control datum, and a statement of map or measurement accuracy for that engineering survey. That is 6731.1(d).

Section 2.3 returns to how (d) differs from land-title certifications and from the city or county engineer’s final-map certificates.

Putting the four subdivisions together

Work every CES scope item as a classification problem.

Domain I.H scope filter

When the question is whether the civil engineer may do the work, ask:

1. Is the object a 6731 fixed work, or city and regional planning of those features?
2. Is the act alignment or elevation of that work, topo or object position by trigonometry or photogrammetry, digital data for those acts, or an accuracy statement about those products?
3. If the act is a property boundary, Record of Survey, USPLSS corner, or land-title survey, 6731.1 does not authorize it for a typical civil engineer licensed after January 1, 1982.

That three-step filter is the statutory core of Domain I.H. Later chapters teach how to run the surveys. This chapter teaches whether the survey is inside civil engineering surveying at all.