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In Upper and Lower Canada, concession roads were laid out by the colonial government through undeveloped Crown land to provide access to rows of newly surveyed lots intended for farming by new settlers. The land that comprised a row of lots that spanned the entire length of a new township was "conceded" by the Crown for this purpose (hence, a "concession of land"). Title to an unoccupied lot was awarded to an applicant in exchange for raising a house, performing roadwork and land clearance, and monetary payment. Concession roads and cross-cutting sidelines or sideroads were laid out in an orthogonal (rectangular or square) grid plan, often aligned so that concession roads ran (approximately) parallel to the north shore of Lake Ontario, or to the southern boundary line of a county.
Unlike previous American colonial practice, land in Ontario was surveyed first before being allocated to settlers.
In some townships, the "line road" name (e.g., Ninth Line) was applied to the roads that elsewhere were called "concession roads", i.e., roads that ran between two adjacent concessions.
By one count, there were five major Ontario survey systems, with 166 variations, resulting in a "crazy quilt" of surveys. In many cases special colonization roads ran diagonally across the grid. Survey lines referenced back from the Great Lakes ran at different angles, forming triangles and other irregular shapes. Some townships had more than one survey. Holland, Nelson and Toronto Township (today Mississauga) are examples.
In a common square grid layout known as a 1,000 Acre Sectional System, adjacent parallel roads were 100 chains or 1.25 miles (2.0 km) apart, and arranged as 10 100-acre lots each 20 chains by 50 chains so that two consecutive concession roads and two consecutive side roads enclosed a square of 1,000 acres (4 km2).
Another system used 100-acre lots each 30 by 33.333 chains, again arranged in 1000-acre blocks. Concession roads were 5/6-mile apart, while sideroads were 1-7/8 mile apart.
Other plans used during colonial surveying used different layouts and lot sizes of 100, 150, 160, 200 or 320 acres.
In a Single Front survey, lots were measured from one side of the concession to the other. Any errors in the survey became apparent at the road junctions, with the side roads being offset.Example Jogged Intersection in Single Front Township
In a Double Front survey, lots were measured from the front of the concession to a midpoint, and then from the back of the concession to the midpoint. This makes the road junctions even, but any errors result in jogs at the midpoint of the side road. Example Even-Intersection Jogged-Sideroad in Double Front Township
- Road Allowance—a strip of land for provision of a public road between lots. Typically 66 feet wide or one chain.
- Unopened Road Allowance - is a public highway that has not been opened and assumed for maintenance purposes by-law of the township.
- Baseline—The first concession road in a township, was often called the baseline (from the surveying term), and roads so named remain in many municipalities, including Ottawa, Clarington and London.
- Front—the first concession road was also frequently called the front.
- Broken front—concession along a lake shore.
- Townline—a boundary line or road between two townships, e.g., Adjala-Tecumseth Townline. Note that townlines might be side roads.
- Given Roads—special roads made to avoid natural obstacles interfere with the grid.
- Gore—triangular shaped lots
Concession Road NumberingEdit
In some townships, numbering is sequential, starting from one side. For example, in King Township, concessions start from Yonge. Bathurst is the (former) Second Concession road, between concessions 1 and 2 (forms the front of the second concession of land). There is no "first" concession road.
In some townships, the baseline passed through the middle, with concessions numbered on each side.
- In Peel, north of Eglinton, Hurontario is the centre line, with concession line roads being numbered East or West. McLaughlin Road is the former "first line west" (fronts second concession of land).
- For example, in Warwick Township in Lambton County, the Egremont Road was the baseline, with successive concessions numbered either "North of the Egremont Road" ("NER") or "South of the Egremont Road" ("SER").
In some townships, such as those in Bruce County, each side of each successive concession road comprised a separate numbered concession. Thus, the south side of a road might be Concession 2 and the north side Concession 3. In this system, for the purposes of road signing only even (or, sometimes, odd) numbers were used, so that concession roads were successively numbered, e.g., 2, 4, 6, etc. This simplified the address numbering of farm lots, especially along township boundary roads where opposite sides of the same road were in different townships. Where even numbers were used, the numbers of odd-numbered concessions would appear only in property records (e.g., Lot 18, Concession 11, Brant Township, which would be on the north side of Concession Road 10).
Many concession roads retain their original names. Less developed areas are often referred to as "back concessions".
Side Road NumberingEdit
Side road or sideline numbering varies depending on the township. Some examples:
- Sequential—In King Township, sideroads were numbered consecutively. The last concession road was 13, so the first sideroad was 14, the next 15, and so on.
- By adjacent lot number—Many townships in Bruce County, are numbered in multiples of 5, i.e., starting with the town line (road on township boundary), then numbered 5th, 10th, 15th, and so on, with five lots between each pair of successive sidelines in the original township survey. The side road number is tied to the adjacent lot number.
The "side road" name survives on several roads in Ontario.
In most of Upper Canada this layout of roads preceded urban development, so that most Ontario municipalities now have grid patterns of streets. In cities, many concession roads have become major streets. However, a few of the "sideline" roads in urban areas still retain their historic numbered lines or use "Line" for their street designations: Brown's Line, Ninth Line, and Guelph Line are important thoroughfares in Toronto and its western suburbs.
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