Fish-passage & aquatic-barrier remediation

Names and classification

Record type

intervention

Kauaʻi occurrence and status

Recorded state

Available, active, proposed or context-dependent

Conservation interventions

Action definition

Restore movement through culverts, diversions and other artificial barriers

Mechanism of action

Remove barrier or retrofit hydraulics/grade while retaining required infrastructure function

Prerequisites

Barrier inventory; engineering; landowner/agency authority; flow compatibility

Implementation context

Priority stream barriers affecting native amphidromous species

Expected outcomes

Improved native passage and longitudinal stream connectivity

Monitoring design

Passability; upstream recruitment; hydraulic conditions; invasive spread

Unintended consequences

Can facilitate invasive species too; poorly designed structures may fail hydraulically

Implementation limits

Implementation status, cost and efficacy must be tied to a dated place/program record.

Sources and further reading

• https://dlnr.hawaii.gov/cwrm/surfacewater/

Connected Atlas records

• Aquatic barriers & channel alteration · Threats & Conservation