After conducting research, I was unable to find any specific information regarding the CR E0340 boat ramp in Rogers County, Oklahoma. However, based on similar boat ramps in the area, it is likely that this ramp is a standard concrete or paved boat ramp with a moderate width of approximately 15-20 feet.

The body of water that this ramp services is also unclear without additional information. Rogers County is home to several lakes and rivers, including Oologah Lake, Skiatook Lake, and the Arkansas River. It is possible that the CR E0340 boat ramp provides access to one of these bodies of water.

In terms of permitted watercraft, this information would also depend on the specific body of water the ramp services. Generally, Oklahoma requires all motorized watercraft to be registered and display a current registration decal. Additionally, certain watercraft such as personal watercraft (i.e. jet skis) and sailboats may have specific regulations or restrictions depending on the body of water.

Overall, without more information, it is difficult to provide a detailed description of the CR E0340 boat ramp in Rogers County, Oklahoma. It is recommended to contact local authorities or consult a map or guidebook for more specific information regarding this boat ramp and the water it services.