This article is notable because:
It is results from a major international competition for countries from Central America and the Caribbean. In some respects, this competition is the top event for the year for countries that attend.
The source listed is the official results for the competition, which is what is replicated hereit is the definitive reference for results.
The fact that this reference still exists in a place where it is readily retrievable is lucky and unusual. I've yet to find online similar results/items related to the 19 previous Central American and Caribbean Games, meaning this information appears lost to the online community. I also fear that the Cartagena site will one day also come offline, similar to what has happened to the 2007 Pan American Games website and the 2004 Olympics website. I see getting this information transferred over before it is gone as a good thing.
The results from this event help provide insight into the previous editions of the Games, primarily through the Games Record listing involved. The full results also provide an indication of how advanced each country is in their competitive level, and also helps provide perspective on the World Record listed. 
This entry is one of a series (it is 1 of the 38 swimming events from this competition). To delete just the one would be out-of-place/inappropriate, and cause the main entry to be missing part of its relevant information.
These results provide additional reference/items of interests/importance/notability for those individuals involved in the competition.