Essex Rivers Hub

Blackwater; Abbey Mill, Coggeshall Hamlet

This section is split between the main river and the Mill Race. The Mill Race has a slow flow with deep water and is very straight. The main river has a more natural structure with meanders, medium flow and shallow water. Both the Mill race and the main river have natural banks with a narrow strip of vegetation before amenity grass and a footpath begin. There are some trees in the section so there are small areas of shade along the channel.

The area (land use)

The dominant land use for this stretch of river is pasture and suburban.

No livestock were recorded.

Channel characteristics

The river channel consists of mainly silt, and riffles are absent.

At the time of recording the flow of water was medium and the channel was 2--5m wide and <0.5m in depth.

For most of this stretch the channel profile is steep.

Bankside trees were frequent, marginal plants and in-channel plants are frequent. Woody debris was noted to be rare.

Engineering

The channel has been straightened and man-made enhancements are present along this stretch of river.

Field drains were recorded as absent and barriers / culverts are present.

Condition

Areas of trampling / poaching were absent and areas of erosion were absent at the time of the survey.

Wildlife

The following were seen or heard during the survey: Grey Heron, Blackcap, Chiff Chaff, Partridge, Green Woodpecker and Orange Tip Butterflies.

Additional Information

There are 2 weirs in the section, one weir the Mill Race begins and one where the Mill Race re-joins the main river. Both of these will be significant barriers to fish. The water appears brown at the time of the survey so the silt content may be quite high. In-channel plants were also present in the Mill Race.

There are some houses in the upstream section before the Mill race begins and the river flows through some of the gardens.

RBD/catchment/river/tributary

River Blackwater

Date completed

April 2014

Upstream Grid ref

TL8551521923

Downstream Grid ref

TL8535521553

Website key stakeholders:

Environment Agency logo      Essex Wildlife Trust logo            Essex Biodiversity Project logo

Design by LTD Design Consultants and build by Garganey Consulting based on an original concept by Herts and Middlesex Wildlife Trust