Case study:Adams Mill enhancements

Jump to: navigation, search
(0 votes)

To discuss or comment on this case study, please use the discussion page.

Location: 52° 5' 52", -0° 45' 15"
Edit location
Loading map...
Left click to look around in the map, and use the wheel of your mouse to zoom in and out.

Project overview

Edit project overview
Status In progress
Project web site
Themes Fisheries, Hydromorphology
Country England
Main contact forename Rob
Main contact surname Clapham
Main contact user ID
Contact organisation Environment Agency
Contact organisation web site
Partner organisations Milton Keynes Angling Association, Woodland Trust
Parent multi-site project
This is a parent project
encompassing the following
Stabilization work commences

Project summary

Edit project overview to modify the project summary.

Site is location of a historically successful Barbel fishery. Recent deterioration has been noted by EA and Anglers at this location. Surveys have shown that the decline is likely to be a result of increased sediment load from collapsed banks undermined by signal crayfish activity, along with historic modifications that have reduced the natural resilience of the river.

Measures undertaken and planned at this site include:

- Tree planting (started April 2014) 50 Willow whips planted in margins of river.

- Further tree planting (Completed in Feb 2015) 100 Alder, 50 Hawthorn, 25 Oak, 25 Maple and other species, to be planted along this section of river with support from Woodlands Trust.

- Bank stabilization( October 2014) 2 sections of bank stabilazation completed using brushwood bundles, staked into bank.

- Riffle enhancement(started October 2014) 1 riffle enhancement installed in October 2014. (2 Poplar logs staked and tied with fencing wire). 1 riffle ehancement installed in additional location in Feb 2015 (5 Poplar logs 2-4 m in length secured with 20mm re-bar. Logs to be in alternating orientations to maximise variation in scour patterns).

- Channel narrowing (expected 2015)

All work undertaken by Environment Agency with assistance from local volunteers.

Monitoring surveys and results

Edit project overview to modify the Monitoring survey and results.

Location of riffle enhancement 1 is existing WFD monitoring site for fish. Pre- and post-enhancement survey data will be available.

Lessons learnt

This case study hasn’t got any lessons learnt, you can add some by editing the project overview.

Image gallery

Bank stab fin.JPG
Defelctor install.JPG
Deflector fin.jpg
Wood pile.JPG
IMG 5019.JPG

Catchment and subcatchment


River basin district Anglian
River basin Upper and Bedford Ouse


River name Ouse (Cosgrove to Newport Pagnell)
Area category 100 - 1000 km²
Area (km2)
Maximum altitude category 100 - 200 m
Maximum altitude (m) 113
113 m
0.113 km
11,300 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Improved grassland
Waterbody ID GB105033038000


Name Adams Mill
WFD water body codes GB105033038000
WFD (national) typology Low, Medium, Calcareous
WFD water body name Ouse (Cosgrove to Newport Pagnell)
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body Yes
National/international site designation
Local/regional site designations
Protected species present No
Invasive species present Yes
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use Improved/semi-improved grassland/pasture
Average bankfull channel width category 10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category 2 - 5 m
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)

Project background

Reach length directly affected (m) 575
575 m
0.575 km
57,500 cm
Project started 2014/09/01
Works started 2014/10/03
Works completed
Project completed
Total cost category Less than 1 k€
Total cost (k€)
Benefit to cost ratio
Funding sources Environment Agency Grant in Aid

Cost for project phases

Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname
Investigation and design Less than 1 k€ Environment Agency Rob Clapham
Stakeholder engagement and communication Less than 1 k€ Environment Agency
Works and works supervision Environment Agency Rob Clapham
Post-project management and maintenance
Monitoring Less than 1 k€ Environment Agency Rob Clapham

Reasons for river restoration

Mitigation of a pressure Invasive species, sediment, Flood protection maintenance works
Other reasons for the project


Structural measures
Bank/bed modifications Bank stabilisation
Floodplain / River corridor
Planform / Channel pattern Increase in-channel hydromorphological diversity
Non-structural measures
Management interventions
Social measures (incl. engagement)


Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Substrate conditions Yes No Yes Yes No
Quantity & dynamics of flow No No Yes Yes No

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Fish Yes No No Yes No
[[]] No No No No No

Physico-chemical quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Any other monitoring, e.g. social, economic

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Habitat mapping No No Yes Yes No

Monitoring documents

Additional documents and videos

Additional links and references

Link Description

Supplementary Information

Edit Supplementary Information