How deep is Higganum Reservoir?

Higganum Reservoir reaches a maximum depth of 30 feet in the CT DEEP Lake Bathymetry survey. Most of it is far shallower: the survey charts 6 closed depth contours over about 31 acres, and half of that water sits inside the 12 ft line.

Where is the deepest part of Higganum Reservoir?

The deepest charted water on Higganum Reservoir lies inside the 30 ft contour, toward the northern end of the lake. That contour encloses 1.1 acres, 3.7% of the mapped water, so it is a small target on a small water, the depth chart above gives the contour to line up on.

How much of Higganum Reservoir is shallower than 12 feet?

About half. The 12 ft contour encloses 15 acres of the roughly 31 acres inside the outer 0 ft line, so the other half of the water is shallower than 12 feet. The sharpest drop is between 0 and 6 feet, where the mapped water sheds 8 acres.

How accurate is this Higganum Reservoir depth map?

The contours come from the CT DEEP Lake Bathymetry survey, retrieved August 2026 and last rebuilt on August 19, 2026. Depths change over time with water levels and sediment, so treat this map as a planning guide for fishing, and never use it for navigation. Acreages are computed from the published contour geometry, not from a separate area survey, so read them as close approximations.

Connecticut lake depth maps

Higganum Reservoir depth map

Higganum Reservoir in Haddam, Connecticut reaches a depth of 30 feet. Higganum Reservoir is charted here across 6 closed depth contours, from the 0 ft line down to 30 ft, enclosing about 31 acres of water. Half of that water lies inside the 12 ft line, and only 1.1 acres lie inside the deepest one. Every contour is on the interactive map below, free and without an account.

Data: CT DEEP Lake Bathymetry (CC0). Contours closed, checked and area-computed by Jordan Carter, founder of GilledIt · page updated August 19, 2026

Higganum Reservoir depth chart: 6 depth contours from 0 to 30 ft

Data: CT DEEP Lake Bathymetry (CC0), retrieved August 2026 · depths change over time · not for navigation

Higganum Reservoir depth chart data: water enclosed by each contour
Depth contour	Water inside it	Share of mapped water
0 ft	31 acres	100%
6 ft	23 acres	73%
12 ft	15 acres	48%
18 ft	8.1 acres	26%
24 ft	4.4 acres	15%
30 ft	1.1 acres	3.7%

Acreages are computed from the closed CT DEEP Lake Bathymetry contour rings, with islands subtracted. Shares are of the 31 acres inside the outermost charted contour (the 0 ft line), which is the outer edge of the mapped water, several state files carry no 0 ft shoreline line, so this is not the same as a share of the lake's published surface area.

Fishing Higganum Reservoir: an evenly graded bottom

Inside its outermost 0 ft contour the survey charts about 31 acres of Higganum Reservoir, with the 12 ft line enclosing half of it, so the bottom loses depth gradually and evenly, with no broad shelf and no single abrupt drop. The sharpest change on the chart is between 0 and 6 ft, where the mapped water loses 8 acres in 6 ft of depth, that band is the contour to work first, because it is where the bottom stops being flat. The deepest 30 ft contour holds 1.1 acres, 3.7% of the mapped water, toward the northern end of the lake. Nothing here reaches a true cold-water layer at 30 ft, so structure does the thermocline's work: the points and inside turns where the 0 and 6 ft lines pinch together fish hardest in early season, and again as fish follow bait back down in autumn.

Ice fishing on Higganum Reservoir

At 30 ft, Higganum Reservoir is a workable ice depth: deep enough to hold fish all winter without the slow freeze-up of a big basin. Start on the 30 ft hole, 1.1 acres of it, at first light, then move up onto the 0–6 ft break as the sun gets up, and fish the flats inside the 12 ft line through the middle of the day. Check ice thickness locally before you walk out.

Higganum Reservoir depth map FAQs

How deep is Higganum Reservoir?: Higganum Reservoir reaches a maximum depth of 30 feet in the CT DEEP Lake Bathymetry survey. Most of it is far shallower: the survey charts 6 closed depth contours over about 31 acres, and half of that water sits inside the 12 ft line.
Where is the deepest part of Higganum Reservoir?: The deepest charted water on Higganum Reservoir lies inside the 30 ft contour, toward the northern end of the lake. That contour encloses 1.1 acres, 3.7% of the mapped water, so it is a small target on a small water, the depth chart above gives the contour to line up on.
How much of Higganum Reservoir is shallower than 12 feet?: About half. The 12 ft contour encloses 15 acres of the roughly 31 acres inside the outer 0 ft line, so the other half of the water is shallower than 12 feet. The sharpest drop is between 0 and 6 feet, where the mapped water sheds 8 acres.
How accurate is this Higganum Reservoir depth map?: The contours come from the CT DEEP Lake Bathymetry survey, retrieved August 2026 and last rebuilt on August 19, 2026. Depths change over time with water levels and sediment, so treat this map as a planning guide for fishing, and never use it for navigation. Acreages are computed from the published contour geometry, not from a separate area survey, so read them as close approximations.

Depth maps for lakes near Higganum Reservoir

Millers Pond depth map · 18 ft max · 4 mi away
Pataconk Reservoir depth map · 15 ft max · 5 mi away
Dooley Pond depth map · 15 ft max · 6 mi away
Cedar Lake depth map · 40 ft max · 7 mi away
Chapman Pond depth map · 16 ft max · 7 mi away

Mapped fishing venues near Higganum Reservoir

Higganum Reservoir in the venue directory covers access and fishing details for this water.

Millers Pond · 4 mi away
Pataconk Reservoir · 5 mi away
Dooley Pond · 6 mi away

Fishing in Connecticut needs a state license: Connecticut fishing license guide · all Connecticut venues