ETC Construction Methods & Field Operations Flashcards

What is the purpose of a grading plan in site development?

Answer: To define finished elevations, slopes, and drainage patterns for the site

A grading plan shows existing and proposed elevations, slopes, and drainage flow patterns to manage stormwater and establish final grades.

What does 'proctor density' refer to in earthwork specifications?

Answer: The maximum dry density of soil determined by a standard laboratory compaction test

Proctor density is the maximum dry density of a soil at its optimum moisture content, determined by laboratory compaction testing and used as the compaction target.

What is the purpose of a silt fence during construction?

Answer: To control erosion by trapping sediment from runoff water

A silt fence is a temporary sediment control barrier that filters runoff water, trapping soil particles before they leave the site.

What does the term R-value mean in the context of pavement design?

Answer: Resistance value of subgrade or base material measured by the Hveem stabilometer test

R-value measures the resistance of subgrade or base materials to deformation under lateral load, used in California and some western states for pavement design.

What is a construction submittal?

Answer: Documents, samples, or data submitted by the contractor for engineer approval prior to procurement or installation

Submittals are contractor-prepared documents such as shop drawings, product data, and samples submitted for engineer review to verify compliance with specifications.

What is the primary purpose of dewatering during construction?

Answer: To remove groundwater from an excavation to allow work in dry conditions

Dewatering removes groundwater from excavations using pumps, wells, or sumps to maintain dry working conditions for foundation and underground work.