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Nine Mile River

By Steve Dewey

In this blog post, we’re going for a short journey along Nine Mile River. It’s a short journey because it’s a short river that is little wider than a stream for most of its length. The river starts below the downs at the eastern end of the eastern Plain, and heads towards Bulford, where it meets the Avon.

Its name might lead you to believe that the river is nine miles long, but it's not; it's approximately four and a half. The river perhaps gets its name because, travelling north from Salisbury through Bulford, you first cross the river nine miles from Salisbury. Alternatively, it might be so named because it joins the Avon nine miles from Salisbury.

The headwater of the stream starts - at least in a wet winter – somewhere below Brigmerston and Figheldean Downs, near Brigmerston plantation. The water rises from springs, undoubtedly fed by the slopes around.

A view from Brigmerston Down into the valley and towards Brigmerston Plantation on the right

Maps of various periods show ponds near the Plantation, and the stream heading south and west from them. These maps also show how these ponds rise at the end of Bourne Bottom, the shallow valley that runs from the north across the eastern Plain and fills with water, if not a flowing stream, in a wet winter.

The headwaters of the river, from the 1880 OS 25-inch map

The actual spot at which the stream rises undoubtedly moves with the season. On the day I took most of the images for this photo essay, the stream was rising much further downstream, nearly a mile away from the ponds shown on the map above.

First Ponds

These first ponds – fed perhaps by water from the high ground along the east of the Plain, and by water flowing down, or beneath, Bourne Bottom – are dry in the summer. I look forward to going back this winter and seeing how far back upstream the water rises when the winter rains have soaked the downs around.

One of the ponds, currently dry

You can see from the photo above how lush the grasses are. This is the place of one of the ponds, dry now in early summer, but very green. How water arrives here remains a little bit of a mystery to me. Bourne Bottom is just over the other side of some trees and a track, but the ground rises a little between here and there; this makes me wonder if, like the Deverill, the waters of Bourne Bottom run underground for a short distance.

Also here is a rather fine dew pond.

The dew-pond mirror. If only there had been a moon to rake…

Second Ponds and Ford

In the shallow valley through which the river wanders are a few tracks, which ford the waters when they flow. By the second ponds is the first ford. In June, this was dry, and it was interesting to see the flint gravels that had been rolled downstream by the winter flows.

Streambed gravels

It is unusual in the chalky parts of the Plain I visit to see gravel like this; there is sometimes similar gravel in the bed of the winterbourne at Water Dean Bottom, but this was more impressive, showing as it did the course of the stream in winter.

A close-up of the gravels

It feels like a different kind of world in the valley of the river. So much greener than the top of the central Plain. A river runs through it, but how flat the valley seems, even this close to the source.

Flat-bottomed valley

Third Ponds and Ford

When I took these photos, the third group of ponds was almost dry, but unlike at the first and second ponds, a little trickle of water rose in the thick grass of the lowest pond. You can just about see it as a dark patch at the bottom of the image below.

A dry pond with a small spring

Then, if you turn to look south-west, downstream, you see the water quickly begins to increase in volume and becomes a silver thread through the emerald-green grasses.