Plan & Build 

Floodplain Bylaw Update

The RDKB is in the process of updating its Floodplain Bylaw.  The proposed bylaw would replace Bylaw No. 677.  Property owners and their agents are encouraged to review the updated mapping and proposed Floodplain Bylaw when planning for development on properties near rivers, lakes, streams, wetlands or other watercourses. 

Some of the main changes from the current Floodplain Bylaw No. 677 to the Proposed Floodplain Bylaw 1844 include:

  1. Addition of floodplain mapping for Beaverdell and Carmi
  2. Updates to mapping around Rock Creek to Midway, Grand Forks (Kettle River only), Christina Lake and Christina Creek
  3. The datum (a system used to measure elevation above mean sea level) has changed since the development of the older floodplain maps. This shift means the elevation from an old survey (CGVD28) will not correspond to an elevation collected using the new datum (CGVD2013a). Meaning the same elevation would have two different height readings, such that an elevation of 447.3m in CGVD28 could be 447.8m in CGVD2013.
  4. Wave action has been included in the Christina Lake Floodplain mapping, which results in varying Flood Construction Level (FCL) elevations along the shoreline of Christina Lake. A property owner will need to refer to the map for the site-specific FCL for their property.
  5. Setback in the river system is identified by the High Fluvial Hazard Extent and Floodway, which varies site by site, as shown in the new floodplain maps
  6. Identification of high and very high hazard alluvial fans (Moody Creek, Sutherland Creek, McRae Creek and Texas Creek) and requirement for site specific assessments
  7. Increased floodplain setback from natural boundary of Christina Lake from 7.5m to 10m
  8. Increased floodplain setback from natural boundary of small lakes, ponds and wetlands from 7.5m to 10m

Bylaw No. 677, 1995 remains in effect until adoption of Proposed Bylaw 1844.  Any development after adoption of the updated floodplain bylaw must comply with the new regulations.  This includes any development that has not been substantially started (regardless of previous approvals like a floodplain exemption and/or a building permit). 

It is staff’s intention to bring Proposed Bylaw 1844 to the Board of Directors for consideration of final adoption in Spring 2023 (May/June). 

*Please see the supporting documents below.