Lower Mainland dike inventory maps
Last updated on August 29, 2023The Lower Mainland dike inventory maps show flood protection works regulated under the Dike Maintenance Act.
The series of map sheets covers:
- Lower Mainland region (Lower Fraser River and tributaries)
- Squamish area (Squamish and Cheakamus Rivers)
- Whistler
- Pemberton Valley (Lillooet River)
The maps contain information on:
- Dike infrastructure, pump stations, flood boxes, riprap and relief wells
- Known areas of hazard concerns, sand boil locations, low dikes and more
- Major road and street network showing access points onto dikes
- Infrastructure relevant to safe operation of the dikes, such as major pipeline crossings
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Map # |
Map Title |
Authority |
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1 |
No local diking authority (NOLA) |
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1A |
City of North Vancouver |
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2 |
Vancouver Airport Authority |
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3 |
City of Richmond |
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4 |
City of Burnaby |
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5 |
City of New Westminster |
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6 |
Corporation of Delta |
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7 |
City of Surrey |
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8 |
Surrey Dyking District |
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9 |
City of Surrey (South Surrey); Colebrook Dyking District; Mud Bay Dyking District |
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10 |
City of Coquitlam; GVRD; NOLA |
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11 |
City of Port Coquitlam; NOLA (Coquitlam River - North of Lougheed Highway) |
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12 |
Coquitlam Dyking District |
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13 |
District of Pitt Meadows |
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14 |
District of Pitt Meadows |
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15 |
Tretheway-Edge Dyking District |
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16 |
Barnston Island |
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17 |
Township of Langley |
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18 |
Road 13 Dyking District; Albion Dyking District (Administered by Maple Ridge) |
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19 |
Glen Valley Dyking District |
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20 |
District of Mission |
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21 |
City of Abbotsford |
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22 |
City of Chilliwack |
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23 |
FVRD (Wilson Rd, Tank Cr. and Guy Cr. Berms); Soowahlie I.R.; NOLA (Dike, Osborne Rd. Dike, Slesse Park Bank Protection) |
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24 |
Dewdney Area Improvement District/Norrish Creek |
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26 |
FVRD "Cascade-Carratt Creek Specified Area" |
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27 |
Nicomen Island Improvement District/North Nicomen (PDF, 1.6MB) * |
Nicomen Island Improvement District; North Nicomen Dyking District |
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28 |
District of Kent; FVRD (Elbow Cr. Dike) |
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29 |
Village of Harrison Hot Springs |
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30 |
Township of Hope |
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31 |
District of Squamish; NOLA (Fernwood Rd. and Dike 5c); North Vancouver Outdoor School |
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32 |
District of Squamish |
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33 |
Pemberton Valley Dyking District; NOLA (Pemberton Meadows Berm) |
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34 |
Pemberton Valley Dyking District; NOLA (Pemberton Meadows Berm) |
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35 |
Pemberton Valley Dyking District; NOLA (Airport Dike, Pemberton Cr. right bank Dike); SLRD (Jason Cr. Dike) |
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36 |
Pemberton Valley Dyking District; Squamish-Lillooet Regional District (Jason Cr. Dike) |
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37 |
19 Mile Cr./High School; Greenside Village - White Gold; Mons - Green Lake Dike; Fitzsimmons Creek Training Berm; Alta Creek Training Berm; Horstman Creek |
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38 |
Treatment Plant; Whistler Creek |
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* 2011 revision or new map |
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Revisions
The October 2009 map revision includes the accepted Fraser River flood profile plus freeboard for the Lower Fraser Valley from Laidlaw near Hope to the mouth of the Fraser River. Please note that the crest elevations of the dikes in the Lower Fraser River floodplain have not been evaluated against this new profile and may be lower than the elevations of this new profile plus freeboard.
As of June 2011, a number of maps were revised with relatively minor changes. The Fraser River profile remains unchanged. The revised maps have been marked with an asterisk (*). In addition, there is now a new map covering most of North Vancouver. An overall index map has also been provided.
Disclaimer
The dikes and dike-related infrastructure and the floodplain inundation areas shown on the Lower Mainland dike inventory maps are compiled resource information to support flood emergency preparedness, planning and response.
The map sheets are to help local authorities with broad-based floodplain management plans and related activities. They are not intended to replace detailed floodplain maps designated under the 1987 Canada–B.C. Floodplain Mapping Agreement.
The inventory data was compiled from various sources including:
- TRIM
- Orthophotos
- As-built drawings
- Operation and maintenance manuals
- Diking authorities
- Historic records
The floodplain extent shown on the maps is based on old data and flooding may occur outside of the floodplain areas shown. The Lower Mainland dike inventory maps are not warranted as to their accuracy or sufficiency by the B.C. Government and are not intended for legal purposes. The maps are provided for the purposes of information only.
How to locate a dike in British Columbia using the dike database and the BC Water Resources Atlas:
The BC Water Resources Atlas is an iMapBC GIS application that displays information related to the water resources of British Columbia.
Emergency planning floodplain maps for the Fraser River floodplain in B.C.'s Lower Mainland:
Contact information
For more information about the Dike Safety Program, please contact the deputy inspector of dikes in your area.