and coastal flood plains covered much of the region. Abundant fossils can be found in this coal. These coal seams supported the region's long history of coal mining. South of the Mira, fossils are also imbedded in the Cambrian sandstones and shales. Marine environment The Mira River has a drainage area of approximately , with the Gaspereau, Salmon and Trout rivers, along with Black Brook, as its main tributaries. Along the southern part of its course, glacial deposits have interrupted the flow to form a chain of small lakes which are all less than 15 metres above sea level. Tidal waters move back and forth in the eastern portion of the river. The waters of the Mira River support a variety of fish species including sea trout, shad, perch, American eel, striped bass, mackerel, herring, brook trout, speckled trout, minnows and smelt. Consequently, the river is popular for fishing. Cultural environment The river's width (on some old maps and in old Sailing Directions it is referred to as a lake) and calm waters make it ideal for pleasure boating and other recreational activities; numerous cottages line its banks. Several campgrounds and parks, along with the Mira Boat Club at Albert Bridge make the Mira River a vacation destination in the Cape Breton Regional Municipality. Popular swimming spots include Marion Bridge, Mira Gut Beach, Sangaree Island, Mira Water Park, and Albert Bridge. The Mira region is also home to the Two Rivers Wildlife Park. According to estimates by the Province of Nova Scotia, there are 102,428 people resident within the Mira/Salmon River watershed in 2011. In popular culture The Mira River was the inspiration for local singer-songwriter Allister MacGillivray's Song for the Mira. Over the years, it has become a renowned folk song, that has been recorded by many artists and translated into several different languages. Bridges The Mira River is presently crossed by three road bridges, Victoria Bridge, carrying Grand Mira South Road, Marion Bridge carrying Nova Scotia Route 327, and Albert Bridge, carrying Nova Scotia Trunk 22, each bridge in their respective namesake communities. Over the years there have been several other bridges, conveying road or rail. For over 140 years the mouth of the river was spanned by the Mira Gut Bridge, a swing bridge with a revolving middle span. First built as a railroad bridge for the Sydney and Louisburg Railway, and later converted to a road