Grading Plans
Cal State Engineering Inc. provides professional grading designs from our highly experienced engineers and design experts. Our capabilities include anything from residential housing pads to commercial building pads and roads. With either design, on-site tests, or lab assessment, our staff has the experience to provide for your entire site development needs, start to finish.
Soil Compaction Testing
  • Grading in excess of 1,000 cubic yards
  • Finished grades that are steeper than 50%
  • Fill of greater than 5 feet in height on natural ground with a slope greater than 33%
  • Cuts or fills of more than 10 feet in height
  • Fills intended to support structures
Several other laws require grading plans, please contact us for more information and specifics on grading plans.

Most fill material on gading jobs need soil compaction testing.

Here at Cal State Engineering Inc., our field technicians are trained in several areas of expertise including soil compaction testing. The test consists of compacting the soil into a standard mold using standardized compaction energy at several different levels of moisture content (density of soil depends directly on moisture content). The results of the test determine the maximum dry density and optimum moisture content of the soil needed for on-site compaction.

A Nuclear Density Test provides a direct, instantaneous readout of soil moisture content, soil density, and percent proctor by using two small radiation sources in the Nuclear Guage. This is done on site to determine if the soil on site is compacted to optimum density determined by the proctor curve found in the lab from the compaction test.

Sieve Analysis

Another test done in our laboratory is the Sieve Analysis. The sieve analysis is done to assess the particle size distribution of a granular material. The size distribution is often of critical importance to the way material performs in use. It can be done for any type of non-organic or organic granular materials including sands, clays, granite, feldspars, coal, soil, and manufactured powders.

A typical sieve analysis involves screening a weighed material sample through a number of sieves to determine what percentage of the sample is screened through each sieve (each of the sieves being different sizes of wire or mesh cloth.

compaction mold



When moving material for placement of buildings, driveways, drains. etc. a grading plan is always suggested. Depending on county laws and ordinances, grading permits need to be issued for those grading more than approximately 50 cubic yards of material.

Certain county laws require engineered grading. Some examples of reasons for engineered grading include, but are not limited to (may differ county to county)

soils lab
Our soils testing lab.
A nuclear guage is used to test soil density.
soil test




Observation of a sheepsfoot during compaction.
A soil compaction mold.
Sieve screens used to assess partical size distribution.





JACKSON, CA. 95642

(209) 223-1441(209) 223-5044 FAX


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427 Broadway - Jackson, Ca. 95642 - (209) 223-1441 - ( 209) 223-5044 Fax -

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