I apologize, but there seems to be an error in the question. The boat ramp named Louis Bernard Memorial Drive 24590, Lafourche Parish is not located in Iowa. It is actually located in Louisiana.

According to the latest information available, the Louis Bernard Memorial Drive boat ramp is a concrete ramp that is approximately 16 feet wide. It provides access to the Bayou Lafourche, which is a navigable waterway located in Lafourche Parish, Louisiana.

This boat ramp is suitable for small to medium-sized vessels including fishing boats, canoes, kayaks, and small pontoon boats. However, larger boats may have difficulty navigating the narrow waterway and may not be permitted to launch from this ramp.

Overall, the Louis Bernard Memorial Drive boat ramp is a popular destination for boaters and fishermen in Lafourche Parish, Louisiana, providing easy access to the scenic Bayou Lafourche.