Earthworks for roadway Earthworks between A and B (Level – Cutting) (i) Draw parallel lines at 5m intervals (ii) Identify intersections with contours and draw curve Earthworks between B and C (Rising – Embankment) (iii) Draw required arc (iv) Draw parallel lines at 7.5m intervals (v) Identify intersections with contours and draw curve Strike and dip of stratum (ii) (vi) Draw DF and establish point on DF at altitude of E (3.2) (vii) Draw correct strike line in plan (viii) Draw X,Y, perp - Leaving Cert DCG - Question C-1 - 2009

Next, examine the contour lines on the map. Mark the points where your parallel lines intersect with the contour lines. Use these points to draw a continuous curve, representing the cutting profile between points A and B.

For the embankment section between B and C, draw an arc that connects point B to point C. This arc should reflect the natural slope and elevation transition necessary for an embankment.

Using point B as a starting point, draw parallel lines at an interval of 7.5 meters upward towards C. Clearly label these lines to indicate their respective elevations.

Similar to the first section, identify where the new parallel lines intersect with contour lines. Mark these intersections accurately and connect them with a smooth curve to represent the embankment profile.

Sketch line DF on the map, which represents the desired strike line. Identify point E at an altitude of 3.2 meters on DF and label it accordingly.

From point D, draw the correct geological strike line across the map, ensuring it runs perpendicular to the dip of the stratum.

At the point where the strike line intersects the contour, draw axes X and Y that are perpendicular to the strike line. These will help in determining the dip of the stratum.

Using the intersecting lines, calculate the dip angle by measuring the angle formed with the horizontal line. Make sure to mark the dip direction for clarity.

Indicate the direction of the borehole on your plan view. Draw this line from point X on the X-axis, aligning it with the structural geology indicated by the contours.

In an auxiliary view, represent the borehole with a vertical line starting from the XY plane. This line should correspond to the depth and direction noted previously.

Calculate the thickness of the stratum at the location of the borehole by measuring the vertical distance from the surface down to the identified layer, and label this thickness appropriately.