I've chunked together, into a PDF file, the plans for the Lark scow as published in Rudder magazine in the 1940's. It calls for a traditional build of the Lark but that doesn't mean you couldn't utilize modern technology and build it another way. To download the PDF plans click on the upward pointing arrow icon in the top right of the app bar. This will pop the PDF into another tab and you can print or download from there. Note that page 12 of the PDF file is blank.
Click here for the William Kerr plans and instructions to build the Lark scow.
Click here for the background post on the Lark scow.
For The Rudder magazine's second DIY scow, the Swallow, click here.