In this exercise, you will calculate volumes by the section volumes method. With the section volumes method the average of adjacent cross section areas is multiplied by the distance between them.

First, sample average end area sections for both surfaces.

1. On the Terrain menu, click Section Volumes Sample Sections to display the Site Volume Librarian dialog box.

2. From the Select site list, select Site1, and then click OK to display the Section Volume Settings dialog box.

3. In the Volume Calculation Type section verify that Average end area is selected, and then in the Direction section select M (x).

4. Accept the default Volume Corrections factors, and then click OK to sample sections for both surfaces.

   Use the following steps to calculate average end area section volumes for the site.

5. On the Terrain menu, click Section Volumes Calculate Volume Total to display the Site Volume Librarian dialog.

6. From the Select site list, select Site1, and then click OK to display the Section Volume Settings dialog box.

7. Accept the default values in this dialog box by clicking OK, and then press ENTER.

The section volumes method calculations are displayed on the command line, with a cut volume of 3,478 m3, a fill volume of 21,012 m3, and a net volume of 17,534 m3 of fill.