Thanks to all about additional information. The event was the Red Bull Flugtag, where some types of "flying machines" are launched off a ramp into the water. There needed to be an event permit from the City, and State as well as the USCG.
The State permit specifically asks if there is any obstruction to normal flow of marine traffic, and how many patrol boats will be used, plus a diagram of where the event and patrol vessels will be located.
They had received a USCG permit, with the following stipulations:
"Special services to be rendered by the Coast Guard are listed. You are reminded that your organization is primarily responsible for safety in the regatta area and that this permit does not relieve you of such responsibility. Participants shall be adequately briefed and their boats equipped as required by law. A permit may also be required by a state, county or municipal agency.
This authorization grants no exemption from state or local ordinances. In the event of any change in the information furnished in your application you will notify this office.
There will not be a Special Local Regulation issued. No restriction is placed on the use of any navigable waters by other parties. Your event shall not obstruct any channel or normal shipping lane, or interfere with any aid to navigation. The Committee man in Charge shall control participants to prevent conditions hazardous to other craft in the area."
The permit application had anticipated estimated 100 boats: over 500 attended. This is an area where normally no anchoring is allowed. The permits are designed for organizations which normally are on the water, and I suspect that "Red Bull" organizers have little if any experience with this aspect of the event.
I have obtained these permits for sailing and power races, as well as marine parades. The permits assume that the persons requesting the permits, will have boats on the water to patrol and keep clear navigational channels. The permittee can request additional coast guard resources and Coast Guard Auxiliary sources be present. The procedure to obtain the permit is well outlined in a Coast Guard manual. The review of the permit is a six stage process, where the CG and applicants may meet and review all safety precautions and impact on navigational waters. Although certain parts of waterways will be shut down--if there is to be a major impact, a
Local Notice to Mariners will be issued, which apparently was not done here, according to the permit.
In this case the event was terminated by order of the Coast Guard almost 2 hours before it was scheduled to end--but it still took law enforcement 2 hours to clear the area. I doubt that the Coast Guard, Marine patrols etc had sufficient resources to do any real law enforcement. Also there was a mob mentality shown by the "boaters". Some reported that the Cruise ship and Coast Guard had used loud hailers to try and clear a path. Even though there was not a CG patrol assigned specifically to clear a safe path for the Portland Spirit, I believe that CG should have requested resources to do so, when they realized the magnitude of the crowd. Lots of "blame" to go around.