RiverFish

Roach · Rutilus rutilus

Roach in the Hammer Stream

Largest measured roach: 17.1 cm

The largest roach measured in Environment Agency surveys of the Hammer Stream was 17.1 cm, recorded at Upstream Buckhurst Bridge (Site 1) on 4 July 2016.

Across 45 measured roach, the median measured length was 13.5 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Hammer Stream.

See roach records across England →

Most recent observation4 July 2016Buckhurst Farm u/s Weir (Site 3) · 3 fish
Largest measured roach
17.1 cm
Median length
13.5 cm
Fish measured
45
Survey locations
3

Individual EA measurements

Largest measured roach

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
17.1 cm4 Jul 2016Upstream Buckhurst Bridge (Site 1)150219
15.9 cm4 Jul 2016Buckhurst Farm u/s Weir (Site 3)150221
15.8 cm4 Jul 2016Upstream Buckhurst Bridge (Site 1)150219
15.6 cm4 Jul 2016Buckhurst Farm u/s Weir (Site 3)150221
15.5 cm4 Jul 2016Upstream Buckhurst Bridge (Site 1)150219
15.5 cm4 Jul 2016Upstream Buckhurst Bridge (Site 1)150219
15.5 cm4 Jul 2016Upstream Buckhurst Bridge (Site 1)150219
15.1 cm4 Jul 2016Upstream Buckhurst Bridge (Site 1)150219
15 cm4 Jul 2016Upstream Buckhurst Bridge (Site 1)150219
14.9 cm4 Jul 2016Upstream Buckhurst Bridge (Site 1)150219

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where roach were found

Each point marks a survey location with at least one roach record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding roach
Upstream Buckhurst Bridge (Site 1)4 Jul 20164 Jul 20161
Buckhurst Farm u/s Weir (Site 3)4 Jul 20164 Jul 20161
Buckhurst Farm d/s Weir (Site 2)4 Jul 20164 Jul 20161

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2016–2016

Survey records by year

Each bar shows how many survey visits recorded roach that year.

Fish measured by surveyors

Measured length distribution

See how the 45 measured fish were spread across different length ranges.

Smallest
5.7 cm
Lower quarter
12.3 cm
Median
13.5 cm
Upper quarter
14.5 cm
Largest
17.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Hammer Stream

Compare other species with enough survey and measurement data for a detailed page.

Gudgeon Pike

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →