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Morrisburg Dive Sites

Explore the Rapide-Plat Canal and Lock 23.

  • Welcome
  • About Me
  • The Overall Dive Site
    • Overview
    • 1959: The New Morrisburg
    • Today’s Shoreline and Dive Site
  • Upstream Sites
    • The Rapide Plat Canal
    • The Tin Plate Power House: Finding the Site
    • The Tin Plate Power House: Exploring the Site
  • Getting to the Locks
    • The Drift to the Locks: Aiming for your Arrival Spot
    • Clues Along the Bottom as You Drift to the Locks
  • The Locks
    • The Rapide Plat Lock (1847)
    • Lock 23 (1905)
    • Top of the Wall: The Park South of Lock 23
    • Top of the Wall Between the Locks
    • The Approach Pier
  • The Hydroelectric Plant
    • HE Plant: Overview
    • HE Plant: From Sluice Gates to Plant
    • HE Plant: Beyond the Plant
    • The HE Plant Route: Best for Novices
  • Leaving the Locks
    • Exit Plan: Getting to the Beach
    • A Bare-Bones Guide to the Exit
    • North and East Aren’t Quite What We Thought
  • Teaching Moments
    • More Weight is Better in Current: Ummmm… Nope.
    • Removing an Integrated-Weight BCD Underwater
    • Replacing a Weight Pouch Underwater
    • 2022 August 17: Such Low Water!! Such poor viz!
    • Ted’s Excellent Adventure
  • Blog

Tag: Lock 23 Morrisburg

2021 Canada Day Dive

On July 3, 2021July 4, 2021 By SJSchnurrIn 2021 News, Lock 23

Virtually all of our dive friends dove elsewhere on Canada Day this year - charters are opening up and groups can get together a bit more freely in other spaces... Morrisburg's waterfront park and beach were packed with sun-lovers but Larry and I had the river below all to ourselves! The current was very mild …

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My First Dive of 2021 – June 9

On June 10, 2021June 11, 2021 By SJSchnurrIn 2021 News, Blog

I went on my first dive of the season last evening on Lock 23. Conditions are now pretty much “normal” with the exception of low water. Current was moderate throughout the dive, though it felt strong heading south at the start and then again north at the end, largely because of low weed growth. Stride …

Continue reading My First Dive of 2021 – June 9

Dive Conditions: June 3, 2021

On June 3, 2021June 4, 2021 By SJSchnurrIn 2021 News, Blog, Lock 23

A few divers have been out during this past week, social distancing at entry and exit, and giving non-divers lots of space. The beach is closed but divers have exited there without interference. Water levels continue to be low, at least as low as last summer if not moreso. The International River Board is keeping …

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Dive Conditions Oct 12, 2020

On October 12, 2020October 12, 2020 By SJSchnurrIn 2020 News, Blog

Weather and water temps have been pretty much the norm for the middle of October: sunny, cool days punctuated by regular rain and thunderstorms and the river dipping below 15C/60F. The main event of this Thanksgiving weekend has been the International River Board's raising of the water level in Lake St. Lawrence (the area between …

Continue reading Dive Conditions Oct 12, 2020

Lock 23 Diving is Running Smoothly

On July 22, 2020 By SJSchnurrIn 2020 News, Blog

Diving at Lock 23 is working well with beautiful weather, good dive conditions, and ample parking for those divers who are comfortable outfitting themselves without assistance and can cruise the locks with the knowledge that they can get home safely if separated from their buddy or group. Within these parameters, the system runs smoothly. There …

Continue reading Lock 23 Diving is Running Smoothly

Lock 23 Conditions: June 4, 2020

On June 4, 2020October 12, 2020 By SJSchnurrIn 2020 News, Blog

The water is slowly warming up: 12.5C/54.5F, comfortable for only the most hardy wet-suiters. Most divers (of the few that are out there now) are still wearing drysuits. Current is quick - the dam in Cornwall is wide open to continue reducing levels in Lake Ontario. Water levels are low but not ridiculously so - …

Continue reading Lock 23 Conditions: June 4, 2020

Lock 23 Conditions: May 15

On May 15, 2020June 27, 2020 By SJSchnurrIn 2020 News, Blog

This should prove to be an interesting season at Lock 23. COVID-19 aside, let me first review the current state of spring river conditions. Recall that Morrisburg's Lock 23 sits in the middle of "Lake St. Lawrence", the 1959 body of water between Cornwall and Iroquois created when dams were constructed at either end. The …

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Record Low Waters!

On January 6, 2020June 27, 2020 By SJSchnurrIn 2020 News, Blog

As of January 1st, and with the end of the season for freighter travel, the International River Board has decided to dramatically increase outflow from Lake Ontario in an effort to further reduce water levels there. They will do so until ice formation prevents it. In our Lake St. Lawrence region (between Iroquois and Cornwall …

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The HE Plant Route: Best for Novices

On August 8, 2019August 17, 2020 By SJSchnurrIn Blog, The Hydroelectric Plant

Over the years we've guided novice divers through Lock 23 in a number of different spots and have generally concluded that the easiest is the innermost route leading to and through the remains of the Hydroelectric Plant. This route is best for novices for several reasons: It has no current to cross over during the …

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Arrival Landmarks at the Locks

On July 29, 2019August 17, 2020 By SJSchnurrIn Approach Drift, Blog

I've completed (well, almost... there are a few tidbits to add) my 3D model of Lock 23. Here's a top view. And here's a front view. The point of this post is to let you know where the heck you are when you arrive at your first barrier at the end of the long approach …

Continue reading Arrival Landmarks at the Locks

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