British Columbia Floodplain Maps


British Columbia maintains a comprehensive index of maps showing floodplains, or flood hazard limits / flood areas, throughout the province of BC.  These maps illustrate flood risks associated with large river systems as opposed to urban overland flow systems that can cause urban flooding.

The map to the right is an overview of BC flood map areas.  Use the links in the list below to find the floodplain map for a particular river, creek, reservoir or lake.

Langley Floodplain Map
To the left is an example of a floodplain map for a particular area - in this case for Langley, B.C. (click to enlarge).  Zooming in shows buildings and properties that lie within the flood risk zone.  I have spliced together parts of two maps to show an area near the Langley Bypass and Frazer Highway with residential properties within the flood hazard area.

Close-up of buildings in flood risk zone.
The maps show over a hundred buildings within the risk zone.  Remember this map shows the limits for a 200-year floodplain - this is the limit of river flooding during a 200-year rainfall event, which is and extreme storm having a chance of occurring of 0.5% every year (1/200%).  While this seems rare, if you lived in one of the buildings at the edge of the flood hazard (i.e., right on the floodline), you would have a 22% change of being flooded over that period.  This risk is often misreported by saying you would expect that flood event once in every 200 years (this implies a 100% chance over that period).  In fact in 200 years there is only a 63% chance of being flooded.

Th bird's eye view shows some of the variation in flooding depth based on the map's topographic elevations and flood elevations that vary along the river length.  You can see that the flood depth varies considerably.  The townhomes that have 130 cm of flooding during that flood would have a much higher chance of being flooded during a smaller storm than those with only 10 cm of flooding during the 200 year flood event.  Alternatively, for any given storm, the flood damages would be greater the closer the building is to the valley bottom with deeper flooding.

Here are the links to available floodplain maps in BC:

A


Alouette and North Alouette Rivers
Drawing No. 89-44 Sheets 1 & 2 - Designation Date 91/09/30

Alpha Lake* (see Whistler Area)
Drawing No. 89-16 Sheets 1 to 4 - Designation Date 93/09/30

Alta Creek* (see Whistler Area)
Drawing No. 89-16 Sheets 1 to 4 - Designation Date 93/09/30

Arrow Reservoir & Kuskanax Creek (Village of Nakusp)
Drawing No. 93-11 Sheet 1 - Designation Date 98/09/30

B


Baker Creek* (see Fraser and Quesnel R.) Drawing No. 89-43 Sheets 1 to 5 - Designation Date 92/09/30

Bear River at Stewart* Drawing No. 91-30 Sheets 1 & 2 - Designation Date 93/09/30

Beaver Creek - Beaver Falls to Meadows Drawing No. 88-35 Sheets 1 to 5 - Designation Date 90/03/31
Bella Coola River
Bessette Creek (See Shuswap River, Bessette & Duteau Creeks) Drawing No. 96-7 Sheets 1 to 8 - Designation Date 98/09/30

Birkenhead River (see Lillooet River) Drawing No. 88-44 Sheets 1 to 11 - Designation Date 90/09/30

Bonaparte River Drawing No. 93-12 Sheets 1 to 3 - Designation Date 96/09/30

Buck Creek (see Bulkley River at Houston) Drawing No. 85-14 Sheets 1 to 3 - Designation Date 87/12/03

Bulkley River at Houston (including Buck Creek) Drawing No. 85-14 Sheets 1 to 3 - Designation Date 87/12/03

Bulkley River: Quick Area* Drawing No. 86-23 Sheets 1 to 4 - Designation Date 88/09/30

Bulkley River: Quick to Houston* Drawing No. 96-10 Sheets 1 to 6 - Designation Date 98/09/30

Bulkley River (see Skeena and Bulkley Rivers at Hazelton) Drawing No. 91-1 Sheet 1 - Designation Date 94/09/30

Bulkley and Telkwa Rivers: Smithers - Telkwa

C


Campbell and Quinsam Rivers Drawing No. 88-28 Sheets 1 & 2 - Designation Date 90/03/31

Cheakamus River Drawing No. 85-15 Sheets 1 to 3 - Designation Date 87/12/03

Chemainus River Drawing No. 89-10 Sheets 1 to 3 - Designation Date 91/09/30

Chilako River Drawing No. 93-1Sheets 1 to 3 Designation Date 97/09/30

Chilliwack River: Vedder Crossing - Slesse Creek Drawing No. A5283 Sheets 1 to 6 Designation Date 87/12/03

Christina Lake
Coldwater River (see Nicola R. - Canford to Nicola L.) Drawing No. 87-22 Sheet 13 - Designation Date 89/09/30

Columbia Lake (see Kootenay R. at Canal Flats) Drawing No. 89-41 Sheets 1 to 8 Designation Date 91/09/30

Columbia River: Columbia Lake to Windermere Lake Drawing No. A5286 Sheets 1 to 6 Designation Date 87/12/03

Columbia River at Golden Drawing No. A5186 Sheets 1 to 4 - Designation Date 87/12/03

Columbia River at Revelstoke Drawing No. 5514 Sheets 1 to 5 - Designation Date 87/12/03

Columbia River: Windermere Lake - Radium Drawing No. A5296 Sheets 1 to 9 - Designation Date 87/12/03

Copper River (see Zymoetz R.) Drawing No. 84-63 Sheet 1 - Designation Date 87/12/03

Coquihalla River at Hope* Drawing No. 85-27 Sheet 1 - Designation Date 88/09/30

Coquitlam River: Coquitlam Lake - Fraser River Drawing No. 5148 Sheets 1 to 7 Designation Date 87/12/03

Courtenay, Puntledge and Tsolum Rivers
Cowichan and Koksilah Rivers and tributaries at Duncan Drawing No. 91-19 Sheets 1 to 6 - Designation Date 97/09/30

Cowichan River - River Bottom Road Area Drawing No. 91-33 Sheets 1 to 3 - Designation Date 97/09/30

Cowichan Lake Drawing No. 84-33 Sheets 1 to 6 - Designation Date 87/12/03

Crawford Creek: Alluvial Fan Drawing No. 86-4-3 sheet 1 - Designation Date 88/09/30

Cummings Creek (see Elk River and Michel Creek) Drawing No. 91-2 Sheets 1 to 3 of 5 - Designation Date 95/09/30

D


Duncan and Lardeau Rivers Drawing No. 93-3 Sheets 1 to 5 - Designation Date 96/09/30

Dutch Creek (see Columbia R: Columbia L. to Windermere L.) Drawing No. A5286 Sheets 1 to 6 - Designation Date 87/12/03

Duteau Creek (see Shuswap River, Bessette & Duteau Creeks) Drawing No. 96 - 7 Sheet 8 - Designation Date 98/09/30

E


Eagle River Drawing No. A5187 Sheets 1 to 7 - Designation Date 87/12/03

Elk River near Elkford*
Elk River at Fernie Drawing No. A5196 Sheets 1 to 7 - Designation Date 87/12/03

Elk River and Michel Creek near Sparwood*
Elk River at Sparwood Drawing No. A5196 Sheets 1a & 2a - Designation Date 87/12/03

Englishman River Drawing No. 85-23 Sheets 1 to 7 - Designation Date 87/12/03

Erie Creek (see Salmo River) Drawing No. 90-32 Sheets 4 to 6 of 9 - Designation Date 91/09/30

F


Fraser River near Hope* Drawing No. 87-1 Sheet 1 - Designation Date 88/09/30

Fraser and Nechako Rivers at Prince George Drawing No. 91-3 Sheets 1 to 12 Designation Date 97/09/30

Fraser and Quesnel Rivers at Quesnel* Drawing No. 89-43 Sheets 1 to 5 - Designation Date 92/09/30

G


Goat River at Creston Drawing No. 84-42 Sheets 1 & 2 - Designation Date 87/12/03

Granby River (see Kettle and Granby Rivers)
Green River (see Lillooet River) Drawing No. 88-44 Sheets 1 to 11 - Designation Date 90/09/30

Green River (see Whistler Area)* Drawing No. 89-16 Sheets 1 to 4 - Designation Date 93/09/30

H


Hirsch Creek (see Kitimat River)Drawing No. A5328 Sheets 1 to 11 - Designation Date 87/12/03

Hixon Creek (see Naver and Hixon Creeks at Hixon) Drawing No. 93-9 Sheets 1 to 3 - Designation Date 96/09/30

I


Illecillewaet River (see Columbia River at Revelstoke) Drawing No. 5514 Sheet 3 - Designation Date 87/12/03

K


Kaslo River at Kaslo Drawing No. 5521 Sheet 1 - Designation Date 87/12/03

Kettle and Granby Rivers
Kettle River - Midway Rock Creek Westbridge Drawing No. 93 - 13 1 to 8 - Designation Date 97/09/30

Kitimat River Drawing No. A5328 Sheets 1 to 11 - Designation Date 87/12/03

Kitsumkalum River (see Skeena R.: Lakelse-Terrace-Usk) Drawing No. 5375 Sheets 1 to 9 of 13 - Designation Date 87/12/03

Koksilah River (see Cowichan River) Drawing No. 91-19 Sheets 1 to 3 - Designation Date 97/09/30

Kootenay River: Columbia Lake at Canal Flats Drawing No. 89-41 Sheets 1 to 8 - Designation Date 91/09/30

Kootenay River: Kootenay Lake - U.S. Border Drawing No. A5278 Sheets 1 to 6 - Designation Date 90/09/30

Kuskanax Creek (See Arrow Reservoir & Kuskanax Creek) Drawing No. 93-11 Sheet 1 - Designation Date 98/09/30

L


Lakelse River and Lake Drawing No. 88-29 Sheets 1 to 6 - Designation Date 90/09/30

Lardeau River (see Duncan and Lardeau Rivers) Drawing No. 93-3 Sheets 1 to 5 - Designation Date 96/09/30

Leiner River (see Tahsis and Leiner Rivers) Drawing No. 89-15 Sheets 1 & 2 - Designation Date 92/09/30

Lillooet River Drawing No. 88-44 Sheets 1 to 11 - Designation Date 90/09/30

Little Qualicum River Drawing No. 93-11 Sheet 1 - Designation Date 97/09/30

Little Slocan River (see Slocan River) Drawing No. 88-26 Sheets 1 to 11 - Designation Date 90/03/31

M


Mamquam River (see Squamish River) Drawing No. 5461 Sheets 1 to 10 - Designation Date 87/12/03

McKelvie Creek (see Tahsis and Leiner Rivers) Drawing No. 89-15 Sheets 1 & 2 - Designation Date 92/09/30

Michel Creek* (see Elk River and Michel Creek near Sparwood)
Drawing No. 91-2 Sheets 1 to 3 of 5 - Designation Date 95/09/30

Millar Creek (see Whistler Area)* Drawing No. 89-16 Sheets 1 to 4 - Designation Date 93/09/30

Miller Creek (see Lillooet River) Drawing No. 88-44 Sheets 1 to 11 - Designation Date 90/09/30

Mission CreekDrawing No. 84-43 Sheets 1 to 3 - Designation Date 87/12/03

N


Nahounli Creek* (see Stuart River and Lake) Drawing No. 89-42 Sheets 1 to 7 Designation Date 91/09/30

Nanaimo River Drawing No. 84-29 Sheets 1 to 3 - Designation Date 87/12/03

Naver and Hixon Creeks at Hixon*Drawing No. 93-9 Sheets 1 to 3 - Designation Date 96/09/30

Nechako River (see Fraser and Nechako Rivers at Prince George) Drawing No. 91-3 Sheets 1 to 12 Designation Date 97/09/30

Nechako River at Vanderhoof Drawing No. 5531 Sheets 1 to 3 - Designation Date 87/12/03

Necoslie River* (see Stuart River and Lake) Drawing No. 89-42 Sheets 1 to 7 - Designation Date 91/09/30

Nicola River: Spences Bridge to Nicola Lake
Nicomekl River (see Serpentine and Nicomekl Rivers) Drawing No. 91-5 Sheets 1 to 14 - Designation Date 94/09/30

Nita Lake* (see Whistler Area) Drawing No. 89-16 Sheets 1 to 4 - Designation Date 93/09/30

North Alouette River (see Alouette River) Drawing No. 89-44 1 & 2 - Designation Date 91/09/30

North Thompson River: Kamloops - Vavenby
Drawing No. A5302 - Sheet 1 is an index map of the whole project showing all sheets.

O


Okanagan Lake: Westbank to Peachland
Drawing No. A5289 Sheets 83 to 90 only - Designation Date 87/12/03
Okanagan River: Osoyoos to Penticton*
Osoyoos Lake*(see Okanagan River: Osoyoos to Penticton)
Drawing No. 89-12 Sheets 1 to 15 - Designation Date 93/09/30

Otter Creek and Lake (see Tulameen River) Drawing No. A5294 Sheets 1 to 4 - Designation Date 87/12/03

Oyster River* Drawing No. 5532 Sheets 1 to 3 - Designation Date 88/09/30

P


Peace River*: B.C. / Alberta Border to Site C
Pemberton Creek (see Lillooet River) Drawing No. 88-44 Sheets 1 to 11 - Designation Date 90/09/30

Puntledge River (see Courtenay, Puntledge and Tsolum R.)

Q


Quamichan Lake (see Cowichan R.) Drawing No. 91-19 Sheets 1 to 6 - Designation Date 97/09/30

Quatse River* Drawing No. 89-7 Sheet 1 - Designation Date 94/09/30

Quesnel River* (see Fraser and Quesnel Rivers) Drawing No. 89-43 Sheets 1 to 5 - Designation Date 92/09/30

Quinsam River (see Campbell and Quinsam R.) Drawing No. 88-28 Sheets 1 & 2 - Designation Date 90/03/31

R


Ryan River (see Lillooet River) Drawing No. 88-44 Sheets 1 to 11 - Designation Date 90/09/30

S


Salmo River including Erie Creek
Salmon River: Salmon Arm - Spa Creek
Salmon River: Spa Creek - Falkland
Salmon River near Prince George* Drawing No. 86-1 Sheets 1 & 2 - Designation Date 88/09/30

Salmon and White Rivers Drawing No. A5282 Sheets 1 to 6 - Designation Date 87/12/03

Serpentine and Nicomekl Rivers
Seymour River - North Vancouver Drawing No. 93-5 Sheet 1 - Designation Date 95/09/30

Seymour River at Seymour Arm Drawing No. 89-11 Sheets 1 & 2 - Designation Date 91/09/30 *Designated Floodplain Map WITHDRAWN 

Shawnigan Lake* Drawing No. A5250 Sheets 1 to 3 - Designation Date 88/09/30

Shuswap River, Bessette & Duteau Creeks
Drawing No. 96 - 7 Sheets 1 to 8 - Designation Date 98/09/30
Shuswap River: Mara Lake to Mabel Lake
Silverhope Creek (see Fraser R. near Hope) Drawing No. 87-1 Sheet 1 Designation Date 88/09/30

Similkameen River at Keremeos
Similkameen River at Princeton Drawing No. 91-22 Sheets 1 & 2 - Designation Date 95/09/30

Skaha Lake* (see Okanagan River: Osoyoos to Penticton)
Skeena and Bulkley Rivers at Hazelton Drawing No. 91-1 Sheet 1 - Designation Date 94/09/30
Skeena River: Lakelse-Terrace-Usk
Slocan River Drawing No. 88-26 Sheets 1 to 11 - Designation Date 90/03/31

Somass River Drawing No. 93-10 Sheets 1 to 4 - Designation Date 97/09/30

Somenos Lake (see Cowichan River) Drawing No. 91-19 Sheets 1 to 6 - Designation Date 97/09/30

Sooke River* Drawing No. 91-4 Sheets 1 to 2 - Designation Date 95/09/30

South Thompson River: Kamloops - Chase
Squamish River: Howe Sound - High Falls Creek
Stuart River and Lake at Fort St. James* Drawing No. 89-42 Sheets 1 to 7 - Designation Date 91/09/30

T


Tahsis and Leiner Rivers - Village of Tahsis
Drawing No. 89-15 Sheets 1 & 2 - Designation Date 92/09/30

Telkwa River (see Bulkley and Telkwa Rivers)
Drawing No. 84-68 Sheets 5 to 8 - Designation Date 87/12/03

Thompson and North Thompson Rivers: Kamloops Area
Toby Creek (see Columbia R.: Columbia L. to Windermere)
Drawing No. A5286 Sheets 1 to 6 - Designation Date 87/12/03

Tsolum River (see Courtenay, Puntledge and Tsolum Rivers)
Tulameen River (see Similkameen River at Princeton)
Drawing No. 91-22 Sheets 1 & 2 - Designation Date 95/09/30

Tulameen River at Tulameen Drawing No. A5294 Sheets 1 to 4 - Designation Date 87/12/03

V


Vaseux Lake* (see Okanagan River: Osoyoos to Penticton)
Drawing No. 89-12 Sheets 9 to 11 of 15 - Designation Date 93/09/30

Vedder River Drawing No. 85-53 Sheets 1 & 2 - Designation Date 87/12/03

W


Whistler Area* Drawing No. 89-16 Sheets 1 to 4 - Designation Date 93/09/30

Williams Lake Drawing No. 88-46 Sheets 1 & 2 - Designation Date 90/09/30

Z


Zeballos River* Drawing No. 89-45 sheet 1 - Designation Date 92/09/30

Zymagotitz River (see Skeena River: Lakelse-Terrace-Usk)
Drawing No. 5375 Sheets 1 to 9 of 13 - Designation Date 87/12/03

Zymoetz (Copper) River Drawing No. 84-63 sheet 1 - Designation Date 87/12/03

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