In this photo released by the Coast Guard, the fishing vessel Miss Clarissa sits below the surface after it sunk dockside at the Quileute Marina in La Push.

In this photo released by the Coast Guard, the fishing vessel Miss Clarissa sits below the surface after it sunk dockside at the Quileute Marina in La Push. (July 2, 2009)

La Push - A Coast Guard crew had to tow a sinking fishing boat from the entrance of a harbor in La Push Thursday -- to keep it from blocking the harbor.

The 48-foot "Miss Clarissa" started sinking in the Quileute Marina early Thursday morning.

The crew of a 47-foot Coast Guard motor lifeboat based at Coast Guard Station Quillayute River was patrolling the bar near the harbor around 4:30 a.m., when it noticed the vessel sinking at its pier.

The motor lifeboat crew took the vessel in tow and relocated it away from the harbor entrance.

The Miss Clarissa was reported to have four-hundred gallons of fuel onboard at the time of its sinking.

At approximately 10:30 a.m., personnel from Station Quillayute River reported evidence of a sheen.

The Quileute Marina Harbor Master surrounded the sunken vessel with a preventative boom on the surface of the water to contain any leaking fuel.

The owner of the Miss Clarissa and Quileute Marina Harbor Master are making arrangements through a private contractor to salvage the vessel.

The cause of the sinking is unknown at this time.