EGP Cut Status
Check this page for ongoing EGP cut updates and most recent data!
CURRENT EGP CUT STATUS: CLOSED as of December 7th, 2025
Latest Edgartown Great Pond Cut Information:
Last Edgartown Great Pond cut was December 6th, 2025 – December 7th, 2025
KEY DATES:
CUT OPENED: December 6th, 2025
CUT CLOSED: December 7th, 2025
TIDAL EXCHANGE: 0 days
EGP Elevation DATA as of 1/8/26 (click on arrow)
▶Edgartown Great Pond Elevation
Figure 1: Readout of Edgartown Great Pond elevation data relative to NAVD88 from December 4th 2025 to January 8th 2026. Blue line representing elevation and black line representing water temperature. The pond’s latest elevation (on 1/8/26) was recorded at 3.53 feet above local mean sea level.
Explore Past EGP Cut Data & More! (click on the arrow)
▶June 2025 Cut
Figure 1: This graph illustrates the elevation relative to NAVD88 of Edgartown Great Pond from 6/9/25 (day the pond was cut) to 6/18/25 (two days after the cut closed). It appears the cut closed sometime on Monday 6/16 around 11 AM; this would entail a 7- day opening.
Figure 2: This graph illustrates the elevation relative to NAVD88 of Edgartown Great Pond from 6/9/25 (day the pond was cut) to 6/16/25 (day the cut closed). As of 11 AM on June 16th, the Pond was tidal, although the signal appeared to be weakening. Elevation was measured at 0.90 feet above NAVD88 (1.28 ft LMSL)
Figure 3: This graph illustrates the elevation relative to NAVD88 of Edgartown Great Pond from 6/9/25 (day the pond was cut) to 6/12/25 (cut was still open). As of 6/12 at noon, the pond was still exhibiting a tidal signal. Elevation was measured at 1.01 ft above NAVD88 (1.39 ft LMSL).
Video Courtesy of Dana Gaines; June 12th, 2025
Video Courtesy of Dana Gaines; June 12th, 2025
Photos taken on June 9th, 2025
Video taken on June 9th, 2025
▶March 2025 Cut
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.
Figure 1: This graph illustrates the elevation relative to NAVD88 of Edgartown Great Pond from 3/8/25 to 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).
Figure 2: These graphs illustrate the salinity (ppt) of Edgartown Great Pond before and after the 8-day cut in both Lyle’s Bay and Wintucket Cove. The yellow line represents the cut timing, while the black represents 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.
From June through October stay up to date with cyanobacteria advisories on our MVCYANO page.