EGP Cut Status

Check this page for ongoing EGP cut updates!
From June through October stay up to date with cyanobacteria advisories on our MVCYANO page.

EGP CUT STATUS: closed

  • Cut opened March 10th, 2025
  • Cut closed March 18th, 2025
  • Tidal Exchange: 8 days

March 2025 Cut Update

The pond was open to the ocean for 8 days, almost reaching the ideal 9-11 day cut opening target. The EGP cut, although not as long as we had hoped, had a positive and measurable impact on the Pond. Ideal cuts increase overall salinity 8-12 ppt pond wide. Data collected following the cut from loggers at Lyle’s Bay and Wintucket Cove indicates salinity increased ~10 ppt.

Pond Elevation

Wintucket Cove elevation logger
This graph illustrates the elevation during the time period of 3/8/25 – 3/25/25.

The elevation on March 10, 2025 was ~3.64 ft NAVD88 (4.02 ft LMSL). On March 20th, following the 8 day cut the elevation dropped to 1.50 ft NAVD88 (1.88 ft LMSL). Since then, as shown in the graph above, the elevation has slowly increased. As of March 25th, the elevation is 1.78 ft NAVD88 (2.16 ft LMSL).

Pond Salinity

Wintucket Cove and Lyle’s Bay salinity loggers
Yellow line indicates date of cut, black line indicates salinity (ppt)

EGP’s ideal salinity is 20 ppt. Pond cuts allow tidal exchanges which increase pond salinity and water clarity. As shown above data collected from loggers at Lyle’s Bay and Wintucket Cove indicates salinity increased ~10 ppt after the March 10th cut.