Highland Creek (Toronto)
Highland Creek and its associated valley
|- right||West Highland Creek|
|Source||Hydro One right of way, near Brimley Road & McNicoll Avenue|
|- elevation||186 m (610 ft)|
|- elevation||75 m (246 ft)|
|Length||29.1 km (18 mi)|
Highland Creek is a river in the Scarborough district of Toronto, Ontario, emptying into Lake Ontario at the eastern end of the Scarborough Bluffs. It is home to several species of fish including trout, carp, and bass. It is a meandering river which, like most rivers in Toronto (including the Don and Humber), travels through a glacial ravine formed after the last Ice Age. The Highland Creek watershed, including tributaries, is almost entirely contained within Scarborough.
Highland Creek consists of four branches, treated here in order from west to east. The names used for the branches indicate only geographic position, and should not be taken as proper names.
The north-west branch begins at the exit of a culvert at Finch Avenue East at . It flows south, then south-east and passes under the intersection of Midland Avenue and Huntingwood Drive. The branch continues east under Brimley Road, then parallels the road south until just north of the Canadian Pacific Railway tracks. The branch then heads under the tracks east and under McCowan Road, before joining the west branch at . The entire length of the branch has been was artificially channelled and straightened, and much of it lined with a concrete bed, in the 1970s after a scare about mosquitoes carrying encephalitis breeding in stagnant creek water (see also "Threats from Development" below). The total length is approximately 3.4 km (2.1 mi).
The west branch begins at the exit of a culvert just southeast of Brimley Road and McNicoll Road at Sheppard Avenue East, then south under Highway 401, and then a further 150 m (492 ft) south. The entire length up to this point has been artificially channelled, straightened and lined with a concrete bed. The next 1.6 km (1.0 mi) stretch, however, a crescent shape that proceeds east to a point just west of Markham Road and which had been previously altered, has now been restored to a more natural state with gentle meanders and shallow pools. From Markham Road, the branch flows east in a natural course and ravine until it meets the central branch at . The total length is approximately 7.7 km (4.8 mi).. This is the most northerly point of any part of the Highland Creek system including all tributaries. It flows south-east under Finch Avenue East, McCowan Road and Middlefield Road. The branch travels 250 m (820 ft) southwest, then south to its confluence with the north-west branch. It continues southeast under
The central branch begins at the exit of a culvert north-west of Middlefield Road and Finch Avenue East at Military Trail, the first crossing point north of Lake Ontario built in the early settlement period, and Ellesmere Road. South of Ellesmere, the branch enters Morningside Park (Toronto), where the tributary West Highland Creek joins at . It travels east through the park, under Morningside Avenue and past some of the outdoor sports facilities and the Dean's Residence of the University of Toronto Scarborough. It continues south-east under Old Kingston Road, Kingston Road and Lawrence Avenue East and through Colonel Danforth Park to meet with the east branch, before flowing into Lake Ontario at . The total length is approximately 13.5 km (8.4 mi).. The branch flows south east, then east under Middlefield to where a short 900 m (2,953 ft) tributary branch running south joins it. The then south-east under the Canadian Pacific Railway tracks, Finch Avenue and Markham Road, then south-east under Highway 401. From this point on, it flows in a natural bed and ravine. It then travels 500 m (1,640 ft) to the confluence with the west branch. The branch then travels south-east under
The east branch rises immediately south of Highway 401, west of Meadowvale Road at . It travels south south-east to Ellesmere Road, before entering a culvert. The branch then emerges east of Meadowvale Road south of Ellesmere, before heading south-west under Kingston Road and Highway 2A. After a further 800 m (2,625 ft), it turns south and is joined by a small stream just before Lawrence Avenue East. It passes under the road and continues south until it joins the central branch just north of Lake Ontario. The total length is approximately 4.5 km (2.8 mi). Unlike the other parts of the creek system, this branch does not flow through any deep ravines.
Threats from development
Due to development in Scarborough, which has substantially increased the amount of water that historically travelled through the river, there are a number of artificial diversions to decrease erosion and guide the river past obstacles. For example, there are a large number of areas where the river is lined with rock cages. There are small dams to even out the flow in areas where upstream storage reservoirs are possible, increasing its depth. The river travels through culverts under some major streets. In addition, many of the city's storm sewers drain into the river. The valley of Highland Creek contains a number of interconnected parks which have a system of paved bike and walking paths. As a result of these numerous channel modification projects, mostly implemented in the 1960s and 1970s, much of the creek does not follow its natural path. This is in contrast to the nearby Rouge River, which has fewer in-stream barriers and extensive riparian and floodplain vegetation, and where a wider variety of wildlife, including some climax forest species, can be found.
Highland Creek historically formed a natural barrier to transportation in the eastern part of Scarborough, with the single exception of Military Trail, blocking the eastern sections of Lawrence Avenue East (at two locations), Morningside Avenue, and Kingston Road until the construction of longer-span bridges beginning in 1937 (Kingston Road) and continuing through the mid-1960s (Lawrence Avenue East, Ellesmere Road). Although the creek itself is rarely more than 20 m (66 ft) wide, the ravine it runs through commonly is over 100 m (328 ft) wide and 30 m (98 ft) deep. During the early part of the 20th century, it also blocked the progression of the Toronto and Scarboro' Electric Railway, Light and Power Company line along Kingston Road, which was unable to negotiate the grade into the creek where it met Kingston Road.
During the late 1940s and early 1950s, a new town plan developed in the valley between Kingston Road and the eastern crossing of Lawrence Avenue. The primary road remains as the park access road to Colonel Danforth Park, but the remainder, with few exceptions, was washed out during Hurricane Hazel in October 1954.
Communities along the creek
Highland Creek is also the name of a neighbourhood on the east side of the creek at Old Kingston Road. Opposite the former village of Highland Creek is West Hill, named for its position on the tablelands above the valley.