St. Mary Levee District bonds affirmed at A+ as Fitch removes criteria watch

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St. Mary bonds A+ affirmed

Highlights

Fitch affirmed St. Mary Levee District's series 2018 limited tax revenue bonds at A+, removing criteria watch, citing 'a' Revenue Risk and 'aa' Resilience assessments.
Bond support relies on a five-mill ad valorem tax, with top 10 taxpayers comprising 25% of the base, and no new debt expected to push leverage above 2x maximum annual debt service.
Negative rating pressure could occur if leverage rises or revenues drop near 2.0x coverage, while an upgrade requires sustained revenue growth and greater tax base diversification beyond oil and gas concentration.

Rating action and bond support profile

As reported by Fitch Ratings, the affirmation applies to St. Mary Levee District's series 2018 limited tax revenue bonds in Louisiana. Fitch says the rating reflects an 'a' Revenue Risk assessment and a 'aa' Resilience assessment, supported by property-based pledged revenues, moderate expected revenue volatility, stagnant growth prospects, and sound coverage of expected maximum annual debt service under stressed scenarios.

The agency says the bonds are backed by a limited five-mill ad valorem tax levied on all taxable property in St. Mary Parish. It also notes taxpayer concentration remains a factor, with the top 10 taxpayers accounting for about 25% of the tax base.

Fitch does not assign an Issuer Default Rating to the district because it is a single-purpose entity with minimal staff and limited operational risk to bondholders. The agency adds that the parish has expressed no plans for additional debt, and it therefore does not expect leverage to rise to 2x maximum annual debt service on an actual basis tested under its framework.

Upgrade and downgrade triggers for the parish

Fitch says negative rating pressure could emerge if the district takes on additional leverage or if pledged revenues decline materially enough to push actual or expected maximum annual debt service coverage closer to or below 2.0x under Fitch-stressed revenue assumptions. For this rating level, the agency applies a standard 10% stress tied to its 'a' Revenue Risk assessment.

By contrast, positive rating action would require sizable and sustained gains in pledged revenue, improving Fitch's view of growth prospects. A meaningful diversification of the tax base, reducing the share of the top 10 taxpayers to materially below 25%, could also support an upgrade.

The parish's tax base remains influenced by a large petrochemical presence, with more than half of the principal property taxpayers tied to oil and gas-related companies. That industry concentration continues to shape the credit profile even as current coverage levels support the stable outlook.

Our earlier coverage of Thames Water’s restructuring situation highlighted how rising political and regulatory scrutiny is increasing uncertainty around the utility’s ownership, creditor treatment, and bond recovery prospects. It also noted that complex stakeholder dynamics and ongoing infrastructure constraints are shaping negotiations and keeping investors focused on downside risks alongside the need for long-term investment.

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