Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
We’ll email you a link to confirm. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES NCC233288

MOUNTAIN ISLAND EARTH DAM EMBANKMENT SEISMIC STABILITY IMPROVEMENTS (ESSI), Mt Holly, NC: NPDES NCC233288 discharge permit, effluent exceedances, inspections, penalties

MOUNTAIN ISLAND EARTH DAM EMBANKMENT SEISMIC STABILITY IMPROVEMENTS (ESSI), held by Duke Energy Carolinas, LLC, holds NPDES permit NCC233288. EPA’s file records it issued April 1, 2024 and expiring March 31, 2029. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for MOUNTAIN ISLAND EARTH DAM EMBANKMENT SEISMIC STABILITY IMPROVEMENTS (ESSI): its NPDES ID, its permit type and status, its dates, its address in Mt Holly, North Carolina. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES NCC233288.

Identity

Facility as filedMOUNTAIN ISLAND EARTH DAM EMBANKMENT SEISMIC STABILITY IMPROVEMENTS (ESSI)
Permittee as filedDuke Energy Carolinas, LLC
NPDES IDNCC233288
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedApril 1, 2024
Expiration dateMarch 31, 2029
AddressMt Holly, NC 28120
SubwatershedMountain Island Lake (HUC 030501011402)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES NCC233288.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES NCC233288.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, NCC233288.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID NCC233288 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

This public-records page covers the NPDES discharge permit NCC233288 for the Mountain Island Earth Dam Embankment Seismic Stability Improvements (ESSI) facility in Mt Holly, North Carolina, held by Duke Energy Carolinas, LLC, with the permit listed as effective and issued April 1, 2024. The page reports 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, and the permit's discharger class is Minor.