Is it possible to plumb the depth of a lake with a ledger rig? I’d like to find where the gullies and gravel bars are.
Hi Greg the short answer is yes you can. You can gather an incredible amount of information about your swim by simply tying a lead on your line and casting it out.
If you cast out a lead and let if descend on a tight line you can count down the number of seconds until the lead hits the bottom. A 3oz lead falls at approximately 3ft per second. It’s not an exact science but it will give you an indication of the depth. It is difficult with depths under 4 or 5ft because the lead is on the bottom before you can start your count.
The accuracy of this process can be increased by adding a marker float to a lead on a running link. Stopping the retrieve every few feet and measuring the line taken from the reel as the float rises to the surface will give you an accurate indication of the profile of the bottom. It also gives you the depth of features such as bars, humps and plateaux as you locate them. The lead can stick or hold on the side of a bar, and the slope of the bottom or bar can increase the resistance of the retrieve confirming what the float tells you. continue reading…