Lower Mainland Dike Inventory Maps

The 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 & tributaries)
  • Squamish area (Squamish & Cheakamus Rivers)
  • Whistler
  • Pemberton Valley (Lillooet River)

The maps contain information on:

  • Dike infrastructure, pump stations, floodboxes, riprap & relief wells
  • Known areas of hazard concerns, sand boil locations, low dikes & more
  • Major road & street network showing access points onto dikes
  • Infrastructure relevant to safe operation of the dikes, such as major pipeline crossings

 Index of Maps (PDF, 3.4MB)

Map #

Map Title

Authority

1

Vancouver Southlands (PDF, 1.5MB)

No local diking authority (NOLA)

1A

North Vancouver (PDF, 1.3MB) *

City of North Vancouver

2

Sea Island (PDF)

Vancouver Airport Authority

3

Richmond (PDF, 1.8MB) *

City of Richmond

4

City of Burnaby (PDF, 1.2MB)

City of Burnaby

5

New Westminster Queensborough (PDF, 2.3MB)

City of New Westminster

6

Corporation of Delta (PDF, 1.7MB)

Corporation of Delta

7

City of Surrey (PDF, 1MB)

City of Surrey

8

Surrey Dyking District (PDF, 1MB)

Surrey Dyking District

9

South Surrey/Colebrook/Mud Bay (PDF, 1MB) *

City of Surrey (South Surrey); Colebrook Dyking District; Mud Bay Dyking District

10

City of Coquitlam/Colony Farms (PDF, 1.3MB)

City of Coquitlam; GVRD; NOLA

11

Port Coquitlam (PDF, 1.2MB) *

City of Port Coquitlam; NOLA (Coquitlam River - North of Lougheed Highway)

12

Coquitlam Dyking District (PDF, 1MB)

Coquitlam Dyking District

13

Pitt Meadows North (PDF, 1MB)

District of Pitt Meadows

14

Pitt Meadows South (PDF, 1.2MB) *

District of Pitt Meadows

15

Tretheway-Edge Dyking District (PDF)

Tretheway-Edge Dyking District

16

Barnston Island (PDF) *

Barnston Island

17

Township of Langley (PDF) *

Township of Langley

18

Albion D.D./Maple Ridge/Road 13 D.D. (PDF)

Road 13 Dyking District; Albion Dyking District (Administered by Maple Ridge)

19

Glen Valley Dyking District (PDF)

Glen Valley Dyking District

20

District of Mission (PDF)

District of Mission

21

City of Abbotsford (PDF, 1.4MB) *

City of Abbotsford

22

Chilliwack (PDF, 2.3MB)

City of Chilliwack

23

FVRD Chilliwack River Frosst Creek (PDF, 1.2MB) *

FVRD (Wilson Rd,Tank Cr. & Guy Cr.Berms); Soowahlie I.R.; NOLA (Dike, Osborne Rd. Dike, Slesse Park Bank Protection)

24

Dewdney/Norrish Creek (PDF, 1.1MB)

Dewdney Area Improvement District/Norrish Creek
(Previous maps 24, 25 combined)

26

FVRD Cascade Creek (PDF)

FVRD "Cascade-Carratt Creek Specified Area"

27

Nicomen Island Improvement District/North Nicomen (PDF, 1.2MB) *

Nicomen Island Improvement District; North Nicomen Dyking District

28

District of Kent (PDF, 1.4MB) *

District of Kent; FVRD (Elbow Cr. Dike)

29

Village of Harrison Hot Springs (PDF)

Village of Harrison Hot Springs

30

Township of Hope (PDF)

Township of Hope

31

Squamish North (PDF, 1MB)

District of Squamish; NOLA (Fernwood Rd. & Dike 5c); North Vancouver Outdoor School

32

Squamish South (PDF, 1.1MB)

District of Squamish

33

Pemberton Meadows North (PDF)

Pemberton Valley Dyking District; NOLA (Pemberton Meadows Berm)

34

Pemberton Meadows (PDF)

Pemberton Valley Dyking District; NOLA (Pemberton Meadows Berm)

35

Pemberton Village (PDF, 1MB) *

Pemberton Valley Dyking District; NOLA (Airport Dike, Pemberton Cr. right bank Dike); SLRD (Jason Cr. Dike)

36

Pemberton Meadows Mount Currie (PDF, 1MB)

Pemberton Valley Dyking District; Squamish-Lillooet Regional District (Jason Cr. Dike)

37

Whistler - North (PDF)

19 Mile Cr./High School; Greenside Village - White Gold; Mons - Green Lake Dike; Fitzsimmons Creek Training Berm; Alta Creek Training Berm; Horstman Creek

38

Whistler - South (PDF) *

Treatment Plant; Whistler Creek

* 2011 revision or new map

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.

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 & 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.