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.
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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).
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39. Chalk River Discovery Trail
Themes:
People
Creation of a new Chalk River Discovery Trail at Tewinbury Farm Hotel.
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38. River Restoration at Tewin Water House
Theme:
Flow; Water Quality, Habitats and Wildlife
This project will increase habitat diversity and reduce siltation.
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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.
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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.
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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.
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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.
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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
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34. Riverfly Monitoring Initiative
Themes:
Status and monitoring
Establishing Riverfl Monitoring on the River Mimram.
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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.
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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.
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14. Black Fan Lagoon
Themes:
Water Quality, Habitats and Wildlife
To ensure that Black Fan Lagoon does not pollute the Mimram
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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.
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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.
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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
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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
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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
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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.
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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.
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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.
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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.
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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
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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.
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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.
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25. Mimram restoration – Digswell to Poplars Green
Themes:
Water Quality, Habitats and Wildlife
Restoring the ecological value of the river valley
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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.
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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.
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20. Increasing public appreciation
Themes:
People
To increase the public’s appreciation of the river, via a series of information boards and school packs.
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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.
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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.
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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.
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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.
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