Case study:Odder Stream Restoration

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Location: 55° 55' 58.33" N, 9° 18' 34.86" E

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Land use management - agriculture
Country	Denmark
Main contact forename	Matthew William
Main contact surname	Cochran
Main contact user ID
Contact organisation	ORBICON
Contact organisation web site	http://www.orbicon.com
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

The odder before restoration

Project summary

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This project aimed to:

(1) Remove 480 kg P per year – equals ¾ of the total Phosphorus loading to Kul Lake; (2) Remove 18 tons N per year or 114 kg/N/ha per year; (3) Stoppage of vegetation cutting and dredging; (4) Removal of all dams/weirs in the entire watershed; (5) Ensure habitat for the orchid Coralroot (Corallorhiza trifida) and Western marsh orchid (Dactylorhiza majalis; (6) Improve habitat for the European brook lamprey (Lampetra planeri) and Eurasian otter (Lutra lutra; and (7) Open the area to the public for recreation – 37 km of trials.

The restoration activities in the first 65 hectares included:

(1) Restoring 1.3 km of stream; (2) Raised the stream bed 50 – 80 cm; (3) Crushed/removed 25 drain systems and 7 ditches; (4) Spawning grounds every 20 meters in the stream – 650 m3 gravel; (5) 15.2 hectares of permanent/semi-permanent wetlands; (6) 8.5 hectares of seasonally flooded wetlands; (7) 6 hectares of seepage wetlands from removing drains; and (8) Area is fenced to allow grazing over entire area – special agreements between land owners.

The River Restoration Centre would like to thank Matthew William Cochran, from ORBICON, for providing the information and photographs for this case study.

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Catchment and subcatchment

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Site

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Project background

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Total cost (k€)	2,975.814632,975.815 k€ <br />2,975,814.63 € <br />
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Funding sources	Danish Ministry of Food, Agriculture and Fisheries; Vejle Kommune

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Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
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Supplementary funding information

Costs 10,840,000 Danish Kroners ( ,971,000 million) support from the Danish Ministry of Food, Agriculture and Fisheries 250,000 DKK (,500) support from Vejle Kommune 11,090,000 DKK (,016,000)

Archaeology survey – 23,000 DKK (,000) Construction costs – 1,925,000 DKK (0,000) Administrative costs – 26,000 DKK (,000) Compensation to landowners – 7,875,000 DKK ( ,430,000) Maintenance of wetland area (grazing) – 985,000 DKK (0,000) Design and consulting services – 250,000 DKK (,500)

Reasons for river restoration

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Measures

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Monitoring

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