We developed water quality thresholds for naturally acidic and metal-enriched streams to support environmental assessments and mine planning for Stockton Mine.

In this waterway restoration project, we helped transformed Quarry Road Drain, with native plantings and a natural meander to enhance native biodiversity and habitat quality.

Long-term monitoring revealed how kōaro (Galaxias brevipinnis) populations responded to remediation of acid mine drainage (AMD) in a tributary of the Ngākawau River, West Coast New Zealand.

We designed a statistically robust programme to quantify the abundance of kākahi – an ‘At Risk’ species – and monitor their population over time.

Many of our native fish species migrate to and from the sea to complete their life cycle. Unfortunately, artificial structures – like weirs and culverts – can block this migration. But where do you start, when there are so many potential barriers to fix?

A nationally significant population of threatened lamprey in an inconspicuous roadside drain made for a challenging roading upgrade project. We worked with several parties to ensure critical lamprey habitat was protected.