2. Invasive Non-Native Species Control

Themes: Water Quality, Habitats and Wildlife

This project aims to eradicate invasive non-native species (INNS) from the catchment. Read more ...

40. River Restoration at Digswell Lake

Themes: Water Quality, Habitats and Wildlife

The River Mimram at Digswell is failing to meet Good Ecological Status under the Water Framework Directive (WFD). Read more ...

39. Chalk River Discovery Trail

Themes: People

Creation of a new Chalk River Discovery Trail at Tewinbury Farm Hotel. Read more ...

38. River Restoration at Tewin Water House

Theme: Flow; Water Quality, Habitats and Wildlife

This project will increase habitat diversity and reduce siltation. Read more ...

37. River Restoration at Sherrardswood

Themes: Water Quality, Habitats and Wildlife

To increase habitat diversity, improve fish passage and reduce sediment ingress in the river near Sherrardswood School. Read more ...

36. Reintroduction of Heptageniidae to the River Mimram

Theme: Water Quality, Habitats and Wildlife; Status and monitoring

To return Heptagenids to the Mimram, following their disappearance, possibly due to pollution incidents in the early 90s, and river restoration and Chalk stream replication at Panshanger and better monitoring of the Riverfly populations to assist protection of the river from pollution. Read more ...

35. Bypassing weirs at Digswell

Themes: Water Quality, Habitats and Wildlife

This project will put in a naturalised bypass channel around three weirs which are currently acting as a barrier to fish passage. Read more ...

42. Riparian Rights and Responsibilities

Themes: People

This project aims to improve riparian landowner understanding of their rights and responsibilities and stimulate action for the river. Read more ...

4. Stream bed improvement at Singler's Marsh

Themes: Water Quality, Habitats and Wildlife

This project aims to remove some of the accumulated silt from the river bed and replace it with imported gravel to encourage wildlife. It will also reduce the overshading of the river to encourage river vegetation Read more ...

34. Riverfly Monitoring Initiative

Themes: Status and monitoring

Establishing Riverfl Monitoring on the River Mimram. Read more ...

33. Opening up the river at Poplars Green

Theme: Flow; Water Quality, Habitats and Wildlife

This project open up the over-shaded river by pollarding, coppicing and removing various trees and areas of scrub. Read more ...

41. Catchment Sensitive Farming - County Wide

Themes: Water Quality, Habitats and Wildlife

Helping farms to play a key role in cleaning up rivers and streams. Read more ...

14. Black Fan Lagoon

Themes: Water Quality, Habitats and Wildlife

To ensure that Black Fan Lagoon does not pollute the Mimram Read more ...

32. Panshanger Park

Theme: Water Quality, Habitats and Wildlife; People

The restoration of the 1000 acre historic Panshanger Park which includes ancient woodland, veteran trees, flower-rich and wet grasslands, fen and marsh, lakes and the River Mimram. The Park will be accessible to the public for nature watching and informal recreation. Read more ...

30. Improving the river between Mimram Valley Marsh and Fulling Mill

Themes: Water Quality, Habitats and Wildlife

To improve the river channel throughout this section, together with the floodplain and riverine habitats. Read more ...

29. Fencing the river between Digswell and Welwyn

Themes: Water Quality, Habitats and Wildlife

To fence off the river, in order to limit erosion of the bank and sedimentation due to stock grazing, and to protect bankside vegetation and wildlife Read more ...

28. Improving fish movement along the Mimram

Themes: Water Quality, Habitats and Wildlife

To ensure the river is passable by fish along as much of its length as is feasible Read more ...

18. Improve Singler's Bridge Entrance

Themes: People

To improve the attractiveness of the entrance to Singler's Marsh, which is one of the few places the public have access to the Mimram. Read more ...

31. Improving the river channel upstream of Codicote Mill

Themes: Water Quality, Habitats and Wildlife

To improve the ecological health of the river channel between Codicote Mill and Duck Trap Wood. Read more ...

12. Keeping the River Mimram clean at Sherrardswood

Theme: Water Quality, Habitats and Wildlife; People

The pupils and groundstaff of Sherradswood School will keep their stretch of the river free from debris/litter and invasive plantspecies. Read more ...

11. How to manage more water on Singlers Marsh?

Theme: Flow; Water Quality, Habitats and Wildlife; People

When Fulling Mill pumping station closes it is likely that there will be more water on the Marsh. This project looks at how this opportunity can be used best for the community, the river and its wildlife. Read more ...

10. River and reedbed restoration at Duck Trap Wood

Themes: Water Quality, Habitats and Wildlife

This project has several aims: to reverse natural succession in marsh and fen habitat, to create a new 2 hectare reed bed, to repair damage to the river from dredging in the 1980s, and to restore 700m to a classical shallow, gravel bedded, fast flowing chalk stream. Read more ...

8. Bringing light to the river at Whitwell

Themes: Water Quality, Habitats and Wildlife

To remove some of the over-shading trees and vegetation, allowing more light to reach the river. Read more ...

5. Revisit failed river restoration at Digswell

Themes: Water Quality, Habitats and Wildlife

To revisit and revise some previous restoration works to the river, which failed to achieve their desired aims. Read more ...

2. Restore the river flow near Pulmer Water

Theme: Flow; Water Quality, Habitats and Wildlife

Restore water flow through this section of the river near Pulmer Water Read more ...

21. Utilise the River Mimram as a classroom

Themes: People

To encourage children to visit the river, and to promote the use of the river as a teaching resource. Read more ...

16. River path clearance at Singler's Marsh

Themes: People

To help keep the paths and access to the Mimram clear of nettles and other obstructions. Read more ...

6. Restoration of wetlands and ponds at Archer’s Green

Themes: Water Quality, Habitats and Wildlife

To restore the ponds to their former ’wildlife haven’ conditions. Formerly, dragonflies and other invertebrates were numerous, and dabchicks, tufted ducks and teal were regularly seen. They had all disappeared by the early 1990s. Read more ...

3. Improving river flow at Singler's Marsh

Theme: Flow; Water Quality, Habitats and Wildlife; People

This project aims to improve the flow of the river by narrowing it and to improve the ecology through planting of native species at this popular public access point. Read more ...

24. Desilting Tewin Water

Themes: Water Quality, Habitats and Wildlife

To desilt Tewin Water to improve and diversify the riverine and wetland habitats in this section of the River Mimram Read more ...

17. Enhancing Tewinbury SSSI

Themes: Water Quality, Habitats and Wildlife

This project aims to enhance the habitats within the Site of Special Scientific Interest (SSSI) and conserve a key population of water voles. Read more ...

27. Reduce water consumption

Theme: Flow; People

This project aims to reduce the amount of water used locally, via education schemes and promotion of water efficiency. Helping people to make the connection between the water in their river and the water in their taps is key. Read more ...

25. Mimram restoration – Digswell to Poplars Green

Themes: Water Quality, Habitats and Wildlife

Restoring the ecological value of the river valley Read more ...

23. Achieve protected status for the River Mimram

Themes: Status and monitoring

Currently the Mimram is not legally protected, unlike some other chalk streams in southern England. This project aims to achieve the highest appropriate legal protection for the river, e.g. SSSI status, via notification under the relevant legislation. Read more ...

22. River Warden Scheme

Theme: People; Status and monitoring

The development of a river warden scheme for the Mimram, to help monitor the health and status of the river. Read more ...

20. Increasing public appreciation

Themes: People

To increase the public’s appreciation of the river, via a series of information boards and school packs. Read more ...

19. Windows of Vision at Singler’s Marsh, Welwyn

Theme: Water Quality, Habitats and Wildlife; People

This project opened up gaps or ‘windows’ in the bankside trees and shrubs which border the main B656 road. This has two benefits: firstly it will improve levels of light reaching the river, encouraging the growth of aquatic plants, and secondly it will also allow passers-by to see the river, increasing their awareness of it. Read more ...

7. Eradicate mink from the Mimram

Themes: Water Quality, Habitats and Wildlife

To continue to monitor mink on the Mimram and the ongoing work to create a greater awareness of their threat to water voles.  If/when mink are found to be present, their trapping and shooting is coordinated. Read more ...

1. Stop the abstraction from the Mimram

Themes: Flow

To campaign for the closure of Fulling Mill and Digswell pumping stations which will improve the level of flow along the length of the Mimram.

Success: The Environment Agency and Affinity Water have agreed for the abstraction licence at Fulling Mill to be revoked. Abstraction is planned to cease at Fulling Mill in 2018. Agreement has also been reached to substantially reduce the abstraction at Digswell in 2020. Read more ...

13. Pond and river restoration at Digswell playing fields

Theme: Water Quality, Habitats and Wildlife; People

This project aims to create a local nature reserve by restoring a pond and section of the Mimram on Digswell playing fields. As well as benefiting wildlife, this will help inform local people about the wildlife in and around the area, and enhance the recreational value of the playing fields. Read more ...