Forty Mile Coulee Reservoir Bathymetric Chart | Alberta Fishing Depth Map

Navigate and target trophy walleye and northern pike on one of southern Alberta’s most impressive coulee fisheries with the official Forty Mile Coulee Reservoir Bathymetric Chart. Located southwest of Foremost and Medicine Hat in Township 8, Range 11, W4 (County of Forty Mile No. 8), Forty Mile Coulee Reservoir is a premier destination for sportfishing, boating, and summer recreation. This high-precision color depth map translates complex underwater bathymetry into clear spatial data, giving anglers and boaters a distinct tactical advantage on the water.

Much like a terrestrial topographic map reveals land contours, this bathymetric chart illustrates underwater depth gradients, steep coulee wall drop-offs, submerged points, shelf transitions, and deep basin channels. Mapped at a detailed 1:10,000 scale with 2.0-meter contour intervals, it details the reservoir's 10.27-kilometer length and substantial maximum depth of 25.48 meters—taking the guesswork out of locating high-probability fish holding zones across the system.

• Detailed 2.0m Depth Contours: Features vivid color gradient rendering paired with 2.0-meter contour lines, clearly highlighting shallow coulee margins (red/orange) down to deep channel trenches (dark blue/purple) reaching 25.48 meters.

• Complete Lake Morphometry Data: Includes technical metrics detailing surface area (674.75 hectares), volume (105,404.08 cubic decametres), shoreline length (33.72 km), maximum length (10.27 km), mean depth (15.63 m), elevation (812.82 m), and 1989 impoundment history.

• Access & Infrastructure: Prominently marks public boat launch access points, shorelines derived from orthophoto imagery, and adjacent DLS grid section lines.

• Fisheries & Angling Optimization: Essential physical reference for trolling deep coulee channels, casting shoreline drop-offs, vertical jigging, and locating winter ice-fishing structure.

• Geospatial & Hydrological Precision: Features complete DLS grid location details (Twp 8, Rge 11, W4), a full Colour/Depth Scale table, a 1.5 km scale bar, and an Area/Capacity Curve graph.

Whether launching a boat for summer walleye trolling or drilling holes across deep coulee trenches during ice season, this bathymetric depth map is an indispensable physical guide for exploring Forty Mile Coulee Reservoir.