Landings Wood Stream : Landings Wood Stream

We have LOTS of new information.
1. See attached annotated map of Godalming, Catteshall Tithe Map 1844.
2. When the small housing estate of 1985 was built on the island created by the R. Wey / 'Mill Stream' and Navigation [cut in the mid-18th Cent.], we assumed that the source of Landings Wood Stream, meandering basically N–S through the woodland [Tithe Map area numbers 6, 15, 16 and 17], was off the R. Wey / 'Mill Stream' to the East. We thought it flowed from the R. Wey at C [on map] and had been channeled beneath the road on the estate [the 1985 estate road crosses N–S over C to C on the map], emerging behind a set of garages to run North (i.e. towards our testing site at A).
3. See new photos of the stream, showing how much more shallow it has been for the latest two testings!
4. We investigated what we thought was a blockage or other obstruction at C [west end]; even entering the stream and probing into the channeling pipe.
5. This did not unblock anything and the stream has been shallow, with a reduced flow, for the past eight weeks.
6. So we investigated and found the Tithe Map of 1844, which shows that in fact the source and underground pipe channelling of the stream originates at D.
7. Apparently, the stream flowed openly until, the housing estate was built, when the section of the stream between C and D was buried and piped, to level the ground for the houses and garages over it at Tithe plot number 17.
8. The west end of this pipe is therefore at the Navigation, and apparently quite deep.
9. We have had a LOT of rain this winter and recently note that many banks and areas of the R. Wey / 'Mill Stream' have had sand bank deposits that make sections shallow enough in the river itself for a person to stand in it. [We even noticed a heron standing in the middle of the 'Modern Mill Cut' [see map!]
10. It seems there has been a significant build-up of sand btw in the river and in the Navigation and has partially blocked the inflow into Landings Wood Stream at D.
10. So, because the shallowness of only a 4–5 inches / 100–125mm at our original testing site at A makes testing difficult, we took this latest test from a new site.
11. The NEW Testing site is a B on the map, where Landings Wood Stream emerges from the woodland to join the Mill Cut, as shown on our annotated map. WE feel confident that the readings from Site B will be similar to those that we have been taking at site A.