Volume 6 – Geotechnical Manual, Site Investigation and Engineering ...

Chapter 6 CHECKLIST FOR TERRAIN FEATURES
6.9 SURVEY CONTROL
a. Survey Department GPS and Boundary Marks for horizontal control
b. Ground control points
c. Permanent ground control markers
d. Survey Department Bench Marks (BM) vertical control; and
e. Temporary Bench Mark (TBM) established
6.10 PLANTATIONS, TREES AND RECREATIONAL AREAS
a. Playing fields
b. Parks and open spaces
c. Laid out pitches
d. Prominent trees; and
e. Land-use and vegetation etc.
6.11 SLOPES AND EARTHWORKS
a. Cutting and embankments
b. Terraced slope
c. Ornamental slopes
d. Mounds
e. Industrial waste; and
f. Refuse tips
6.12 WATER AND DRAINAGE
a. Rivers (name to be indicated)
b. Streams
c. Water courses
d. Ditches (width and depth to be indicated)
e. Swamps
f. Lined drains (type, size, depth to be indicated)
g. Culverts with sizes and invert levels, including sketch of inlet and outlet structures such as wing
wall
h. Irrigation structures such as Weirs, bunds, spillways, barrage, floodgates, dams and floodwalls
i. Pump station sites
j. Tanks
k. Sewer outfalls and top of manhole covers
l. The top of all water features over 1.0 meter wide are to be detailed and the bottom of banks as
indicated by the water level at the time of the survey. The direction of flow of all rivers, streams
and watercourses is to be indicated
m. Slopes with a height greater than 1.0 meter or too sharp a gradient to be shown by contours,
including river banks, are to be shown by conventional markings and the top and bottom of
slopes are to be shown as dotted lines; and
n. Slope conventions are to be drawn as near as possible to indicate the actual shape of the slope
face, i.e. all berms and terraces are to be detailed
o. Flood spillways and closure bunds
p. Tidal variation sites for tidal gate structures or bunds
q. Highest known flood level
Any other visible features not listed likely to affect design and later construction works are also to be
shown.
March 2009 6-3