Well that is true for dams that block free flowing rivers, it is not true for Argo that has a dam 3k up stream and another about 2.5k down steam. In fact it has been shown that there is minimal sediment build up behind Argo as apparently Barton dam is catching the vast majority of sediment. The issue with the sediment behind Argo is is may be polluted from the industrial use from decades past on the site.
The fish population in the Gallup water area is no different than the fish in Argo so the fishing would not change without artificial seeding.
It has been shown that the water in Argo pond is cooler than the water in Barton pond, Barton pond is up stream of Argo, so there is cooling after Barton dam.
The stretch of water that makes up Argo pond is the only certified water safe for swimming along the entire stretch of the Huron within Washtenaw county.
The most significant issue in removing Argo is the Detroit Edison property just past Argo, which is known to be polluted with heavy metals. If the dam is removed the river would run into this area of land and erode/flood it and potentially causing a major pollution issue. As a result the land must be cleared prior to any dam removal, adding millions (yes millions) to the cost of the dam removal project.
Last but not least an independent study has shown that the mill race issue is not a major problem, as originally thought, as a result the city is not going to spend the $1.4 million to remove the dam (not to mention the cost of cleaning up the Detroit Edition property, relandscaping, silt mitigation etc). If you take a look at Annarbor.com site (search Argo) you can read about all of the above. Game over.
As for supporters, recreational users that want to maintain Argo pond have just as impressive of a list and the majority actually live in Ann Arbor:
* Ann Arbor City Council - The decision makers
* The Mayor of Ann Arbor - Publicly stated he is in support of keeping the dam in place. (
www.annarbor.com/news/mayor-addresses-ar...or-rowing-community/)
* 90% of the audience at over 10 city council meeting and public meetings on Argo dam
* Ann Arbor Pioneer High School Crew Team
* Ann Arbor Huron High School Crew Team
* Ann Arbor Skyline High School Crew Team
* University of Michigan Mens Crew Team - National Champions last season
* Joe O'Niel - the builder of the current Argo dam (1972)
* The Ann Arbor Park Commission voted in favor of keeping the dam.
* The residents that live on this stretch of water overwhelming want Argo Pond to remain in place (by the way not one of them was invited to any of the two years worth of discussions on the topic by HRIMP)
* The athletic directors from all three high schools mentioned above
* The citizens of Ann Arbor, take a drive through the city, you will see Save Argo Pond signs everywhere.
Dam out folks should turn their attention to the Ypsi dam where there is a consensus from the entire community to remove the dam. In addition, the US Kayaking Association is very interested in turning this stretch of river into a fast water course. Fight the battles you can win, the Argo debate is over.