the final coordinates are s33 ab.cde e150 fg.hij
add 1 to the south and add 2 to the east
at wp1 the marked coordinates there is a bronze plaque under an awning.
as wp1 is still fenced off i have added a photo of wp1 to the pics on page.
first you need to know
A= area of catchment
B= add all numbers in average annual rainfall together
C= add the numbers of width at crest together
D= second number in length of spillway weir
E= first or last number of base width
at wp2 there is 2 signs final numbers can be obtained from both signs
F= last digit in the year of used for maintenance of upper road canal road purchased
G= on the sign infront of the four pipes, how many numbered points are there?
H= on the sign infront of the shelter how many points are there?
I= what digit is in every four digit number on both signs
J= locking bar pipe is what point.