Lower Trent Conservation is celebrating its 50th anniversary! To commemorate this milestone occasion, we have released our ’50 in 50′ historical blog series. This special series features 50 articles highlighting some of the achievements, milestones and events of the past 50 years. We hope you enjoy them!
In 1975, Lower Trent Conservation along with other Conservation Authorities, took on the task of preparing emergency flood contingency plans and floodplain mapping. The first projects undertaken in the Lower Trent Conservation watershed was mapping for the Trent River floodplain in Trenton (from Highway 401 to the mouth of the river), and Mayhew and Rawdon Creeks, all in 1975.
Floodplains are low-lying areas near watercourses that are naturally subject to flooding. Floodplain maps are produced using a science-based method of field surveys and computer models. Background data is gathered on land use, land cover, topography, soils, stream flow, and precipitation. Field surveys collect information on local infrastructure (culverts, bridges, etc.). Data is then entered into computer models to calculate stream flow and water levels. Review of technical work and modelling is completed to finalize the floodplain map. These maps establish protection areas to guide development projects to safe areas.
In 1975, the federal government initiated the Flood Damage Reduction Program (FDRP) to discourage future flood vulnerable development. The FDRP was carried out jointly with the provinces under cost sharing agreements; Ontario joined the Flood Damage Reduction Program in 1978. Municipalities or Conservation Authorities where they existed, were partners with the federal and provincial governments in the FDRP mapping process and paid a portion of the cost.
A large flooding event in 1980 (over 2 inches of rain on frozen ground) resulted in severe flooding and ice damage in many communities across the watershed, prompting many watershed municipalities to initiate the FDRP funding opportunities. Once a flood risk area was mapped and designated, Lower Trent Conservation worked with local municipalities to keep development away from flood vulnerable areas.
Some local municipalities also opted to investigate whether a 2-zone floodplain concept could be applied in more developed areas of their municipalities. The 2-zone concept identifies a floodway and the flood fringe. The floodway refers to the portion of flood plain where there is a high threat to public safety and property damage from flooding. The flood fringe is the portion of the floodplain where development may be permitted as long as certain flood protection standards and procedures are put in place.
An overview of floodplain mapping for watercourses in the Lower Trent Conservation watershed is shown below. This mapping is a key tool used by Conservation Authority staff in delivering its environmental planning and floodplain regulations programs.
|Year||Waterbody||Community||Municipality||Length of Mapping|
|1975||Trent River||Trenton||Quinte West||4 km|
|1975||Mayhew Creek||Trenton||Quinte West||2.4 km|
|1975||Rawdon Creek – Floodplain Mapping & Channelization||Stirling||Stirling-Rawdon||3.7 km|
|1978||Shelter Valley Creek & Barnum House Creek||rural areas||Alnwick / Haldimand||37 km (SVC) & 5.2 km (BHC)|
|1978||DND Creek||Trenton & CFB Trenton||
|1978||Cold Creek & Butler Creek||Frankford & Brighton||Quinte West & Brighton||1 km (CC) & 4.5 km (BC)|
|1981||Cold Creek – Spill Analysis||Frankford||Quinte West||2 km|
|1981||Mayhew Creek||Trenton||Quinte West||2.4 km|
|1982||Colborne Creek||Colborne||Cramahe||3 km|
|1982||Trout Creek||Campbellford||Trent Hills||5.5 km|
|1983||Mill Creek (Burnley Creek)||Warkworth||Trent Hills||13 km|
|1983||Glen Miller Creek||Glen Miller & Trenton||Quinte West||6.5 km|
|1983||Cold Creek – 2 Zone||Frankford||Quinte West||1 km|
|1983||Mayhew Creek – 2 Zone||Trenton||Quinte West||2 km|
|1983||Trent River||Trenton to Rice Lake||Quinte West, Trent Hills, Alnwick / Haldimand||90 km|
|1984||Glen Miller Creek – Spill Analysis||Trenton||Quinte West||1 km|
|1985||Rawdon Creek||Stirling||Stirling-Rawdon||3.7 km|
|1985||Killoran Creek||Hastings||Trent Hills||0.5 km|
|1988||Trent River – Flood Damage Centres||Trenton to Hastings||Quinte West, Trent Hills||90 km|
|1988||Butler Creek – 2 Zone||Brighton||Brighton||4.5 km|
|1990||Lake Ontario Shoreline||Entire Shoreline||Alnwick / Haldimand, Cramahe, Brighton, Quinte West||140 km|
|1991||Colborne Creek – 2-Zone||Colborne||Cramahe||3 km|
|1991||Lake Ontario Tributary and Butler Creek – Spill Analysis||Brighton||Brighton||1.3 km|
|1995||South Sidney Creeks – Meyers, Massey & 2 others||Sidney Township||Quinte West||1 km (Meyers)
3 km (Trib 2)
2.2 km (Massey)
0.5 km (Trib 4)
|1998||Dead Creek & York Creek||Rural Areas||Quinte West||2.7 km (Dead)
3.6 km (York)
|2002||DND Creek||Trenton – CFB Trenton||Quinte West||8 km|
|2012||DND Creek – Update for Industrial Park||Trenton||Quinte West||2 km|