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Oldman Watershed Council

1-403-330-1346  |  Contact  |  Blog  |  Home  |

abwater.ca
About the Watershed
Water Management
Shared History
Shared Future
Media
Maps
Kids & Youth
Publications
Historical Timeline
Resources & Links
Our Impact
Become a Member
Volunteer
Donate
Jobs
Citizen Science
Become a Watershed Steward
Join
About
Who We Are
Vision & Mission
Board of Directors
Supporters
What is a WPAC?
Annual Reports
Donate
The Oldman Watershed

The Oldman Watershed

Download High Resolution PDF

Oldman Watershed Administrative Boundaries

Oldman Watershed Administrative Boundaries

Download High Resolution PDF

 Detailed Oldman Watershed Map

Detailed Oldman Watershed Map

Download High Resolution PDF

Oldman Watershed Subbasins

Oldman Watershed Subbasins

Download High Resolution PDF

Porcupine Hills Boundary Map

Porcupine Hills Boundary Map

Download High Resolution PDF

Dutch Creek

Dutch Creek

Download High Resolution PDF

Oldman Watershed Headwaters

Oldman Watershed Headwaters

Download High Resolution PDF

Summer Map of Castle (2010)

Summer Map of Castle (2010)

Source: Government of Alberta
Download High Resolution PDF

Winter Map of Castle

Winter Map of Castle

Source: Government of Alberta
Download High Resolution PDF

Castle Proposed Final State (2015)

Castle Proposed Final State (2015)

Produced by Parks Division, Alberta Environment and Park.
Download High Resolution PDF

Hidden Creek Area

Hidden Creek Area

Source: Environment and Parks, Government of Alberta
Download a high resolution PDF

Hidden Creek Area - Detailed

Hidden Creek Area - Detailed

Source: Environment and Parks, Government of Alberta
Download High Resolution PDF

Percent Contribution of Sub-Watersheds to Total Streamflow (1971 - 2000)

Percent Contribution of Sub-Watersheds to Total Streamflow (1971 - 2000)

Map produced by Dr. Stefan W. Kienzle and Markus Mueller, Department of Geography, University of Lethbridge.

Download Map

Alberta Water Yield Per Square Kilometer

Alberta Water Yield Per Square Kilometer

Prairie Climate Atlas

Prairie Climate Atlas

If these climate change predictions come true, massive heat waves will be the norm. The map on the left shows the current situation: Most of the Prairies is shaded blue (meaning 10 or fewer days when the temperature tops 30 C) with only Palliser’s Triangle in the light-green or yellow zones (20 to 25 days of +30 C). On the right is the prediction for the years after 2050 if there isn’t a reduction in greenhouse gases — with 30 to 45 days of scorching hot weather in a typical summer. Source: Alberta Farmer.

MAP GRAPHICS: Prairie Climate Atlas

Canada mapped only by rivers, streams & lakes

Canada mapped only by rivers, streams & lakes

By Vivid Maps. See more here.

Aquatic species at risk maps

Aquatic species at risk maps

From Fisheries and Oceans Canada

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Previous Next
The Oldman Watershed
Oldman Watershed Administrative Boundaries
 Detailed Oldman Watershed Map
Oldman Watershed Subbasins
Porcupine Hills Boundary Map
Dutch Creek
Oldman Watershed Headwaters
Summer Map of Castle (2010)
Winter Map of Castle
Castle Proposed Final State (2015)
Hidden Creek Area
Hidden Creek Area - Detailed
Percent Contribution of Sub-Watersheds to Total Streamflow (1971 - 2000)
Alberta Water Yield Per Square Kilometer
Prairie Climate Atlas
Canada mapped only by rivers, streams & lakes
Aquatic species at risk maps

WHAT CAN YOU DO?

The OWC is a volunteer-driven, not-for-profit organization with lots of ways to get involved. 

Help fund our work.

DONATE TODAY

Make a difference.

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Knowledge is power.

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Oldman Watershed Council, 319, 6 Street South, Lethbridge, AB, T1J 2C71 (403) 330-1346info@oldmanwatershed.ca

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© 2025 Oldman Watershed Council
PO Box 1892
Lethbridge, Alberta T1J 4K5
403.330.1346
info@oldmanwatershed.ca