Morgan Shoal is an ancient fossil reef and one of the South Side lakefront's most beloved places. It's now facing a construction project that could change it forever.

WHAT IS MORGAN sHOAL?

Very few places in a big city let you touch 425 million years of history, swim in a Great Lake, and stand on a landscape shaped by Chicago's own civic history, all in the same spot. Morgan Shoal does.​
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Morgan Shoal stands upon the Chicago lakefront from 45th Street to 51st Street, covering about 4,460 linear feet of shoreline. Morgan Shoal is known by some as Mishigami Shoal to honor the indigenous stewards of this land and lake. The bedrock, found 90 feet below downtown Chicago, protrudes to the surface and is exposed at the Shoal. In July 1914, the Silver Spray passenger ship hit the Shoal and sank. The remains of the wreck can be seen from shore. 
Pebble Beach is a wonderful area with lake glass, small pebbles that range from volcanic, to glacial, to fossilized, and other interesting objects. It is possible to enter the water from this ever changing pebble beach. 
People use this space to swim, meditate, collect lake glass and pebbles, kayak, explore, stand-up paddle board, snorkel, meet friends, watch fireworks, sunrises and moonrises and more. The Silver Spray shipwreck is a popular place for group swims.

Why it Matters

Ancient Reef

About 425 million years ago, a warm tropical sea covered what is now Chicago. Corals, sponges and shellfish built reefs on its floor, and over time those reefs hardened into rock. Morgan Shoal is one of the few places where that ancient reef reaches the surface. Just offshore from Chicago's Hyde Park and Kenwood neighborhoods, this 32-acre shelf of stone shelters fish, mussels and other aquatic life. Its waves shaped Pebble Beach, the only pebble beach on Chicago's lakefront. And the wreck of the steamer Silver Spray, which ran aground in 1914, still rests in its shallows.​

Historic Shoreline

Morgan Shoal isn't just a natural landmark. It's part of Burnham Park, the 650-acre lakefront park that grew from Daniel Burnham's 1909 Plan of Chicago and his vision of a public shoreline for everyone. Like much of Chicago's lakefront, Burnham Park was built from the lake itself, with timber cribs, stone and fill. The shoreline beside the shoal is protected by hand-set limestone "step-stone" revetments, the same kind of historic shoreline that helped make nearby Promontory Point a National Register-listed site and a Chicago Landmark.​

Community Place

Morgan Shoal is home to Pebble Beach that has been a community gathering place for over 100 years. Many Chicagoans consider it  a neighborhood sanctuary. Generations of families have had picnics among the rocks, splashed with their kids in the water and relaxed under the sun, watching the waves. It is a beach combers paradise. A rock hounding delight. It has been dubbed the Mediterranean of Chicago. Unlike many Chicago beaches, there is little to no sand, making it a beloved spot to open water swim, snorkel and dive. The boiler, propeller and other historical artifacts sit atop the reef and have been a continuing source of wonder for swimmers. Though it is called Pebble Beach there's are a lot more than pebbles to be found. Sea-glass, marbles, fossils, old bricks and pavers from Chicago's history are part of the foundation of the beach and is what makes it such a singular place. There truly is nowhere else like it.  

What's happening​

A federal project (USACE Project 22703) would reconstruct the shoreline between 45th and 51st Streets. They have stated that the area would be closed to the public for 3-5 years during the re-construction. The USACE says this closure will have No Significant Impact to the community and ecosystem.  Advocates for Morgan Shoal and independent preservation experts believe the current design treats this historic shoreline as something to be replaced, not preserved, and that Morgan Shoal deserves the same careful, historically sensitive approach given to Promontory Point.​

​What we're asking for
A real review of alternatives that rehabilitate the historic shoreline, consistent with the Secretary of the Interior's Standards, and a public process where community voices count.
Read the Letter from AMS to Illinois Attorney General Kwame Raoul, detailing the legal failures of the PBC + USACE process

WJE experts Explore Morgan Shoal Shoreline and project Plans

Engineering consulting firm WJE walked the shoreline and reviewed the City's plans. They note that the Secretary of the Interior Standards and the community are aligned. The USACE and PBC are not aligned. 

READ THE LETTER:
TELL US WHAT YOU THINK

How would you like to see the shoreline rehabilitated? 

Read the Chicago Tribune article featuring our favorite 400+million year old underwater dolomite formation.
And see for yourself...

Letter from ACHP to USACE regarding standards  10/02/2024
Illinois Department of Natural Resources/ SHPO letter to USACE dated 03/02/2020 regarding USACE emergency repairs

Morgan Shoal Resources

Primer: Community vision and concerns 
Primer Appendices, PBC FAQ response, links, photos, and People's Rendering

State Historic Preservation Office  (SHPO) to USACE regarding Morgan Shoal  07/18/2025
"We concur with the ACHP and Consulting Parties that the Corps revise the amendment to reflect a preservation-based approach to the work at both Promontory Point and Morgan Shoal. In addition, we prefer that Morgan Shoal continue to be part of the draft Programmatic Agreement to ensure that it is treated as sensitively as we hope the Corps will treat Promontory Point." Follow the link to read the entire letter.

Our response following the shoreline walk with officials from the PBC, CDOT, USACE, and Park District  6/11/2024'

Comments delivered to Mayor Johnson during the PBC July 8, 2025 meeting (*PBC has removed their record

The People's Rendering

The People's Rendering

Donate!

Save our Shoal! We are seeking contributions for legal fees and alternative engineering solutions in our effort to protect Pebble Beach and the surrounding wilds. Click here to read more and give!

Watch the video Pebble Beach jam "Save our Shoal" by tchiya Amet:

What is Morgan Shoal?

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ABOUT US

Advocates for Morgan Shoal are concerned humans trying to protect a natural space.
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​Use #savepebblebeach to share your photos and stories of Pebble Beach and Morgan Shoal.

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