Selected work · Eric Pershing

See the site. Understand the work.

Examples of earthwork models and field measurements I produced. The visualizations help reveal grading conditions, material movement, and the questions that need to be answered before an estimate or field decision is useful.

3D earthwork modeling · Plan analysis · Field measurement · Quantity development
01 / Three-dimensional models

Make grade changes visible.

A 3D view can make the relationship between pads, slopes, and surrounding ground immediately clear. I build and review these models to support quantity analysis and practical earthwork planning.

Close view of a color-coded three-dimensional earthwork model with several building pads
Featured model

Grading across a multi-pad site

A close view of the modeled ground, with the surrounding grade relationships visible without software controls.

Perspective view of a long color-coded earthwork model showing building pads and slopes
3D model

Pad and slope relationships

Perspective makes transitions around the building areas easier to inspect.

Oblique model of multiple pads and color-coded grading transitions
3D model

Earthwork across the site

A wider view of modeled grading conditions across the footprint.

02 / Aerial site context

See the ground around the work.

Aerial photography can document current site conditions and show how a work area connects to roads, adjacent development, and surrounding terrain. This view was captured in the Flying Horse area of Colorado Springs.

Aerial view across the new Powers area in Flying Horse, Colorado Springs, with development and Front Range terrain
Aerial documentation · Flying Horse, Colorado Springs

Site context from above

A current visual record of the area and its surrounding development. Aerial imagery supports site communication; it is not presented here as survey-grade mapping.

03 / Plan analysis

Read the full footprint.

Plan views show where conditions change across a site. I use these views with plans and scope assumptions to develop quantities and make the estimate easier to review.

Color-coded earthwork plan analysis of an irregular site
Plan analysis

Grade variation

A visual read of how conditions vary across an irregular footprint.

Second color-coded earthwork plan analysis with contours
Plan analysis

Contour context

Modeled differences viewed alongside the site contours.

Printed color-coded earthwork site plan
Printed plan

A model made discussable

A visual output prepared for review beyond the software screen.

These are examples of modeling work. They are not survey or engineering design deliverables.

04 / Field measurement

Work with the shape on the ground.

Material piles and irregular areas call for more than a simple length and width. I capture perimeter and elevation information, then review the result against the question the measurement needs to answer.

Three-dimensional field capture of a stockpile surface
Field measurement

Stockpile surface

Measured points form a three-dimensional view of an irregular material pile.

Three-dimensional field capture of an elongated material area
Field measurement

Irregular material area

A second field capture showing a different footprint and surface shape.

Field volume depends on the measurement path, reference plane, conditions, and needed accuracy. A defined survey requirement calls for a survey workflow.

Working together

Start with the decision you need to make.

Tell me whether you need a model, a quantity, a field measurement, or help interpreting the scope. I’ll define the method and deliverable around the project rather than sending a generic report.

Analysis and consulting from $75/hour. Field visits and defined deliverables are quoted by scope, travel, and required output.
  • Earthwork models and quantity analysis
  • Cut and fill review
  • Stockpile and irregular area measurement
  • Scope and estimate support
Project inquiry

What do you need measured or modeled?

Describe the site, the decision you need to make, and your timeline. I’ll reply with the next step and an appropriate scope.

Discuss a Project