Case study:Creation of spawning ground for Baltic salmon, anadromous brown trout and river lamprey at Veneküla rapid, river Pirita

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Location: 59° 26' 3.78" N, 24° 55' 50.76" E

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Project overview

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Status	Complete
Project web site
Themes	Economic aspects, Fisheries, Habitat and biodiversity, Hydromorphology, Monitoring
Country	Estonia
Main contact forename	Martin
Main contact surname	Kesler
Main contact user ID
Contact organisation	Estonian Marine Institute, University of Tartu
Contact organisation web site	http://www.sea.ee
Partner organisations
This is a parent project encompassing the following projects

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Project summary

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Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Site

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Name	Veneküla rapid
WFD water body codes
WFD (national) typology
WFD water body name	River Pirita
Pre-project morphology	Limestone bedrock
Reference morphology
Desired post project morphology
Heavily modified water body	No
National/international site designation	Estonia - Koelmuala
Local/regional site designations
Protected species present	Yes
Invasive species present	No
Species of interest	Baltic salmon (Salmo salar), anadromous brown trout (Salmo trutta) and river lamprey (Lampetra planeri)
Dominant hydrology	Riverine
Dominant substrate	Flat monolithic bedrock
River corridor land use	Urban
Average bankfull channel width category	10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category	Less than 0.5 m
Average bankfull channel depth (m)
Mean discharge category	1 - 10 m³/s
Mean annual discharge (m3/s)	5-7"-7" is not declared as a valid unit of measurement for this property.
Average channel gradient category	0.01 - 0.1
Average channel gradient	0,72",72" can not be assigned to a declared number type with value 0.
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	20002,000 m <br />2 km <br />200,000 cm <br />
Project started	2007
Works started	2012/07/15
Works completed	2012/08/30
Project completed	2013/09/30
Total cost category	10 - 50 k€
Total cost (k€)
Benefit to cost ratio
Funding sources	90% covered by EU, Central Baltic INTERREG IV A Programme 2007-2013 and 10% by Estonian Ministry of the Environment

Cost for project phases

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

Reasons for river restoration

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Mitigation of a pressure	Drinking water storage and supply
Hydromorphology	Substrate conditions
Biology	Fish: Abundance
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Breaking the bedrock (>100m3), placing spawning gavel (>110 m3) to the created pool and placing large boulders around the created spawning ground to provide shelter for the fish.
Floodplain / River corridor
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other

Monitoring

Hydromorphological quality elements

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quality elements

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

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Fish: Abundance	Yes	Yes	Yes	Yes	Yes	Improvement

Physico-chemical quality elements

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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

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

Monitoring documents

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Image gallery

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Groundbreaking work in process

Excavating the pool from excess rock

Gravel emplacement

Additional documents and videos

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Additional links and references

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Link	Description

Supplementary Information

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