metals in sediments and water. Eutrophication or undesirable algae, resulting from excessive nutrient runoff (particularly phosphorus) from industrial and agricultural activities. Degradation on fish and wildlife populations Beach closings, due to potential human health effects from body contact with the water Fish tumors or other deformities, that can be caused by chemical contaminants Degradation of aesthetics Degradation of benthos, which form the base of aquatic food webs Restriction on dredging activities Loss of fish and wildlife habitat Parks and recreation Eliza Howell Park The Eliza Howell Park includes donated to the city in 1936. Fair Lane Henry Ford built an estate, Fair Lane, on the river in Dearborn, upriver from the manufacturing plant, on what is now the campus of the University of Michigan–Dearborn. The estate is a now a National Historic Landmark. The master plan and gardens were designed by landscape architect Jens Jensen. A portion of the estate's grounds are a preserved historic landscape and more of it is held as a nature study area since 1956. The residence is now a museum and open to the public. The Henry Ford and Greenfield Village The Henry Ford, billed as "America's Greatest History Attraction", is a major tourist destination in the area including Greenfield Village. Greenfield Village was opened in 1929 to preserve historic landmarks, including Noah Webster’s House, Thomas Edison’s Menlo Lab and the garage where Henry Ford built the Quadricycle, his first car. Rouge River Bird Observatory Since 1992 the Rouge River Bird Observatory has operated on the campus of University of Michigan-Dearborn. Rouge River Gateway Greenway Trail The trail has access points from Michigan Avenue in Dearborn, from Fair Lane and from the University of Michigan Dearborn campus. There is an aspiration to develop the greenway trail all the way to the Detroit River. River Rouge Park River Rouge Park has been operated by the city of Detroit since the 1920s. Its boundary is formed by the railway to the north and West Warren to the south and by Outer Drive, West Parkway and Parkland on the west and Trinity and Burt Road on the east. In July 2014, two Olympic-sized pools and a bath house were reopened at Rouge Park as part of a $5.5 million park renovation project. Covering , River Rouge is the largest park in the city. In contrast, the more well-known Belle Isle State Park of Detroit covers 982 acres (397