Kent coastline of Kent is continuously changing, due to tectonic uplift and coastal erosion. Until about 960, the Isle of Thanet was an island, separated by the Wantsum channel, formed around a deposit of chalk; over time, the channels silted up with alluvium. Similarly Romney Marsh and Dungeness have been formed by accumulation of alluvium. Kent's principal river, the River Medway, rises near East Grinstead in Sussex and flows eastwards to Maidstone. Here it turns north and breaks through the North Downs at Rochester, then joins the estuary of the River Thames as its final tributary near Sheerness. The Medway is
Buffalo, Rochester and Pittsburgh Railway coal was the extension of the line north from Lincoln Park through Rochester up to the coal dock it built at the mouth of the Genesee River in 1896. With an initial capacity of 4,000 tons a day, it was expanded in 1909 and 1913. To get coal to Canada, the BR&P arranged a cross-lake ferry service with the Grand Trunk Railway. This service was highly successful, carrying passengers and coal cars to Cobourg and other lake destinations. By 1913, over a million tons of coal a year passed through the Rochester coal dock. As the national economy grew, more