Hi, my name is*****'m a certified appraiser, and I'd be happy to help.
The "Harriman" who signed this painting isn't a listed or known artist, according to all of the signature databases I consulted. It appears to be a smaller, local artist. Many of these, despite the quality of their work, are completely lost to art history after a few years.
This painting would date to the later 20th century, most likely the 1970s or 1980s. The value would be approximately $200.00, framed.
Please let me know if I can help further.