@Butterflyke & @Swenani, there is some progress but rather on a small scale and when I get a chance to take some photos, I will post something. At Kariobangi South/Pioneer Estate bridge, the Tinga Tinga's are not visible, that is how far they've dug down about 15 metres deep by 15 metre square, they've changed the river course a bit to create a working space and they've repaired the road slightly to ease traffic congestion at the Kariobangi/Huruma roundabout, it is the rains that have delayed them otherwise they would have gone far in that section, half the time they've had to draw water out since it pools every time it pours.