Practitioner guides

Allocation pathways: closed vs open watersheds

Alberta closes a watershed to new Crown surface licences when allocations reach plan limits. Closure is a moratorium on most new surface grants, not a ban on all water use. This page lists the main statutory and practical paths, then explains how Water Register labels rows in the EPA active export.

Province-wide split (EPA active export)

Diversion-row counts from the latest EPA ingest, grouped by closed-watershed editorial map (Bow, Oldman, lower South Saskatchewan). The chart below is an illustrative pathway mix for orientation; row-level instrument and origin labels are in the Professional dashboard.

Closed watersheds

The Bow, Oldman, and lower South Saskatchewan sub-basins closed in 2006 and 2007. Most consumptive growth since then has come through:

• Permanent or temporary transfer under Water Act ss. 81–83 between existing licence holders
• Amendment or renewal that changes volume, purpose, or conditions on an existing authorization
• Temporary diversion licence (TDL) for short commercial, industrial, or construction diversions
• BOSS Order exceptions for First Nations, water conservation objectives, storage, or grandfathered applications
• Hydraulically disconnected groundwater where policy treats the aquifer as outside the closed surface basin (site-specific)
• Inter-basin import where a receiving plan and transfer approval allow water from an open basin
• Bill 7 alternatives such as rooftop rainwater harvesting and approved wastewater reuse
• Household rights and utility contracts where the underlying licence sits with a wholesaler or district

Open watersheds

Where a basin remains open to new surface allocation, holders can still receive:

• New water resources licence subject to basin capacity and environmental review
• Transfers using the same ss. 81–83 process as closed basins
• Interim or preliminary certificates during application review
• Amendments and renewals on existing authorizations
• TDLs for short-term needs

Two-axis classification in Water Register

Each diversion row in the EPA export gets two labels:

Instrument (visible on Free and above): the authorization type from EPA, mapped to temporary diversion, term licence, water resources licence, interim licence, preliminary certificate, or other.

Origin (Professional tier): how the current holder likely received the allocation:

• Original grant when priority year and issue year align and EPA shows an initial allocation event
• Transfer (ERV verified) when the authorization appears on a published, ERV-verified transfer dossier
• Transfer (likely) when priority year is at least two years earlier than issue year (carried seniority after closure-era transfers)
• Transfer (possible) when EPA event text or closure context suggests reallocation but evidence is weaker
• Amendment or renewal when EPA allocation event fields indicate those actions
• Exception grant (review) for post-closure issue dates in closed basins without transfer signals
• Unknown origin when EPA fields are empty or ambiguous (~88% of rows lack a usable allocation event)

Methodology notes

• EPA is the ingest source. ERV is the system of record. Labels are diligence aids, not filing determinations.
• The priority-vs-issue gap heuristic uses a two-year threshold: if priority year ≤ issue year − 2, origin is at least transfer (likely).
• Verified transfer labels upgrade when a dossier links the authorization number and staff set erv_verified_at.
• Classification re-runs after each monthly EPA ingest. See data sources for attribution.

Confirm closure status, transfer approval, and every authorization in the Environmental Records Viewer before you rely on a label in diligence or filing.