Flood Risk Mapping Studies / Public Information Maps

Flooding is a natural process that is a necessary component to the survival and health of many types of ecosystems. The processes and conditions that result in floods are often predictable and usually occur in the same areas, known as floodplains. Unfortunately people are often drawn to inhabit and develop in floodplains as this is usually flat, fertile land. Because of this, floods are one of the most common natural hazards in Newfoundland and Labrador and are often the most costly. Floods can cause considerable damage to property and infrastructure, threaten human lives and cost millions in emergency assistance, clean-up and remediation.

Flooding and erosion processes are quite difficult to control and avoid. As such, the best and most cost effective method of minimizing their impact is proper management and planning of known floodplains. Floodplain management usually involves the adoption of land use regulations that limit human exposure to areas prone to flooding events. For more information on the Government’s approach to management of identified flood zones see the Policy for Flood Plain Management.

The Province, in conjunction with the federal government, has worked to reduce the human hardship and economic loss of floods through the Canada-Newfoundland Flood Damage Reduction Program (CNFDRP). Work under this program was carried out from 1981 to 1993. From 1993 to 1996 further flood studies were carried out under the federal-provincial “General Agreement Respecting Water Resource Management“. This was a comprehensive agreement that included along with Flood Damage Reduction Program, groundwater management, watershed and water quality management, flow forecasting systems, water conservation economic, estuary and aquaculture management studies.

Work under the CNFDRP consisted of undertaking hydrotechnical studies, identifying and mapping flood risk zones and then implementing policies to limit future flood susceptible development in those areas. Flood risk areas are usually subdivided into two zones – the floodway and the flood fringe. The floodway is the portion of the floodplain where the risk of flooding is greatest and flood waters are deepest and most destructive. The outer portion of the flood zone, the flood fringe, is the area where the risk of flooding is lower and water is generally slower and less hazardous than the floodway. For more information, visit the federal government Flood Damage Reduction Program site.

Flood Risk mapping in Newfoundland and Labrador delineates the floodway as zones where floods have a return period of 20 years (5% chance in any year) and the flood fringe where the risk of flooding is once in 100 years (1% chance in any year). Flood risk areas have been mapped for 38 communities in the Province. These maps are used for public information, municipal planning, development control, and the setting of structural design criteria. All proposed developments in flood risk zones are evaluated against potential impacts on water resources, the structures themselves, and the surrounding areas.

To help support climate change adaptation, these flood risk mapping studies are being updated and new ones undertaken using climate change projections. This initiative is important for public safety and information, municipal and development planning, setting of structural design criteria, and flood response. This mapping will assist in regulating new developments in flood-prone areas, help minimize flood damage to properties and the environment, and restrict activities that could degrade water resources. A brochure is available outlining Government’s New Template for Climate Change Flood Risk Mapping.

The flood extents from all previous flood risk studies can be viewed in the Flood Risk Mapping Application.  The application allows viewing of the 1: 20 year and 1: 100 year flood zones and, where available, the climate change flood zones as well.  The flood extents in the application are intended for information purposes only.  The authoritative source of information are the GIS files, maps and reports from the individual studies in the table below.

The table below contains all the studies and mapping associated with flood risk mapping in the Province. This includes:

  • Engineering studies completed as part of the flood risk mapping program.
  • AutoCAD drawings. These are digital versions of the large scale engineering maps, usually at a 1:2500 scale, used to accurately delineate the flood risk area
  • Public Information maps. These are used to show the approximate location of the flood risk area and provide the public with information on the Canada – Newfoundland Flood Damage Reduction Program

The information below consists of 580Mb of data with over 300 Adobe pdf, Jpg, and Tif files. These files contain scanned reports and associated maps and figures. Some map files can be quite large as the original maps were 60cmx90cm or larger.

All of the links below have been tested and if a file won’t show on your computer try clicking the Refresh button on your browser. Otherwise, you can right-click on any link and select “Save Target As” to download a copy of the file to your computer for offline viewing.

 

 

Study Area / Report Title YYYY/MM
Hydrotechnical Study of the Badger and Rushy Pond Areas

Mapping:
Badger AutoCAD DWG Public Information Map  Small  Large  PDF
Rushy Pond AutoCAD not available Public Information Map Small  Large  PDF

River Ice Modelling Study – Exploits River at Badger (1995)
User Manual Badger Ice Progression Model – FORTRAN with BASIC Conversion
Current Badger Ice Progression Model Code – 2002

1985/07
Ice Analysis and Flood Risk Mapping Study of Bishop’s Falls

Mapping:
Bishop’s Falls AutoCAD not available  Public Information Map  Small  Large  PDF

1990/11
Brigus – Hydrotechnical report is not available
Mapping:
Brigus AutoCAD not available   Public Information Map Small Large PDF
Flood Risk Mapping Study of the Codroy Valley Area

Mapping:
Codroy Valley AutoCad not available   Public Information Map Small Large PDF

1990/02
Flood Risk Mapping Study of the Conception Bay Area – Carbonear, Victoria, Salmon Cove, Whitbourne, Heart’s Delight, Winterton, Hant’s Harbour

Mapping:
Carbonear AutoCad not available   Public Information Map Small Large PDF
Victoria AutoCAD DWG   Public Information Map Small Large PDF
Salmon Cove AutoCAD DWG   Public Information Map Small Large PDF
Whitbourne AutoCAD DWG   Public Information Map Small Large PDF
Heart’s Delight AutoCAD DWG   Public Information Map Small Large PDF
Winterton AutoCAD DWG   Public Information Map Small Large PDF
Hant’s Harbour AutoCAD DWG   Public Information Map Small Large PDF

1996/03
Climate Change Flood Risk Mapping Study for Placentia, Carbonear, Victoria and Salmon Cove   NEW!!

Mappings:

Models:

Public Information Maps:

2023/01
Historical Flooding Review and Flood Risk Mapping Study for Cox’s Cove

Mapping:
Cox’s Cove AutoCAD DWG   Public Information Map Small Large PDF

1988/12
Flood Risk Mapping Project Corner Brook Stream and Petrie’s Brook

Mapping
Corner Brook ESRI GIS File Geodatabase (7.0 MB)
AutoCAD DWG (9.6 MB)

Models:
Corner Brook HEC-HMS Model (37.5 MB)
Corner Brook HEC-RAS Model (10.7 MB)
Petrie’s Brook HEC-HMS Model (1.1 MB)
Petrie’s Brook HEC-RAS Model   (994 KB)

Public Information Maps
1:20 and 1:100 AEP Floodlines (45.0 MB)
1:20 and 1:100 AEP Climate Change Floodlines (47.4 MB)
1:20 (13.0 MB) and 1:100 (13.0 MB) AEP Inundation Floodlines

2013/05
Hydrotechnical Study of the Deer Lake Area

Mapping:
Deer Lake AutoCAD not available   Public Information Map Small Large PDF

1987/08
Climate Change Flood Risk Mapping Study and Development of a Flood Forecasting Service: Exploits River Communities NEW!!

Exploits River Communities are: Town of Badger, Community of Rushy Pond, Town of Grand Falls – Windsor, and Town of Bishop’s Falls

Mapping:

Models:

Public Information Maps:

2021/09
Glenwood-Appleton Flood Study Report

Mapping:
Glenwood-Appleton   AutoCAD not available Public Information Map Small Large PDF

1989/11
Glovertown Flood Study Report

Mapping:
Glovertown AutoCAD not available   Public Information Map Small Large PDF

1989/11
Flood Risk Mapping Study of Goulds, Petty Harbour and Ferryland

Mapping:
Goulds AutoCad not available Public Information Map   Not available
Petty Harbour AutoCAD DWG   Public Information Map Small Large PDF
Ferryland AutoCAD DWG   Public Information Map Small Large PDF

1996/03
Flood Risk Mapping Project Goulds and Petty Harbour Area

Mapping:
Goulds and Petty Harbour Area ESRI GIS File Geodatabase (10 MB)
AutoCAD DWG (46 MB)

Models:
HEC-HMS Model (41.2 MB)
HEC-RAS Model (6.7 MB)

Public Information Maps
1:20 and 1:100 AEP Floodlines (109 MB)
1:20 and 1:100 AEP Climate Change Floodlines (110 MB)
1:20 (19.4 MB) and 1:100 (19.8 MB) AEP Inundation Floodlines

2013/05
Flood Risk Mapping Update Project Goulds and Petty Harbour Area Incorporating the Dirty Brook Emergency Overflow Diversion in the Goulds (Map Sheets 14, 15, 19 and 20 have been updated from the 2013 Study)

Mapping:
ESRI GIS File Geodatabase (22 MB)
AutoCAD DWG (66 MB)

Public Information Maps
1:20 and 1:100 AEP Floodlines (36 MB)
1:20 and 1:100 AEP Climate Change Floodlines (36 MB)
1:20 (4.8 MB) and 1:100 (5.0 MB) AEP Inundation Floodlines

2015/12
Climate Change Flood Risk Mapping Study and the Development of a Flood Forecasting Service: Happy Valley – Goose Bay and Mud Lake NEW!!

Volume 1 – Main Report (11.4 MB)
Volume 2 – Technical Appendices (A to O) (19.6 MB)
Volume 3 – Technical Appendices (P – Flood Extent Maps – Current Climate – Churchill River and Mud Lake) (68.3 MB)
Volume 4 – Technical Appendices (Q – Flood Extent Maps – Climate Change – Churchill River and Mud Lake) (68.3 MB)
Volume 5 – Technical Appendices (R – Comparison Current Climate and Climate Change – Churchill River and Mud Lake) (133.9 MB)
Volume 6 – Technical Appendices (S – Depth of Flooding – Churchill River and Mud Lake) (134.6 MB)
Volume 7 – Technical Appendices (S – Flow Velocity – Churchill River and Mud Lake) (133.4 MB)
Volume 8 – Technical Appendices (S – Flood Hazard – Churchill River and Mud Lake) (133.9 MB)
Volume 9 – Technical Appendices (T – Building in Flood Zone – Happy Valley-Goose Bay and Mud Lake) (36.9 MB)
Volume 10 -Technical Appendices (U – Flood Extent Maps – Current Climate and Climate Change – Happy Valley-Goose Bay) (29.4 MB)
Volume 11 – Technical Appendices (V – Depth of Flooding, Flow Velocity and Flood Hazard Maps – Happy Valley-Goose Bay) (86.5 MB)
Volume 12 – Technical Appendices (W and X – Comparison Current Climate and Climate Change – Happy Valley-Goose Bay) (29.3 MB)

Mapping:

ESRI GIS File Geodatabase (48.5 MB)
AutoCAD DWG (179.0 MB)

Models:

HEC-HMS Model for Churchill River (221.9 MB)
HEC-HMS Model for Otter Creek and Seven Unnamed Local Creeks (1012.2 MB)
HEC-RAS Model for Churchill River (55.7 MB)
HEC-RAS Model for Otter Creek and Seven Unnamed Local Creeks (489.2 MB)

Public Information Maps

Flood Extent Maps – Current Climate – Churchill River and Mud Lake (68.2 MB)
Flood Extent Maps – Climate Change – Churchill River and Mud Lake (68.2 MB)
Comparison Current Climate and Climate Change – Churchill River and Mud Lake (133.8 MB)
Depth of Flooding – Churchill River and Mud Lake (134.5 MB)
Flow Velocity – Churchill River and Mud Lake (133.4 MB)
Flood Hazard – Churchill River and Mud Lake (133.9 MB)
Building in Flood Zone – Mud Lake Road Area and Mud Lake – Current Climate under Ice Affected Condition (7.0 MB)
Building in Flood Zone – Mud Lake Road Area and Mud Lake – Climate Change under Ice Affected Condition (7.0 MB)
Building in Flood Zone – Mud Lake Road Area and Mud Lake – Current Climate under Open Water Condition (7.1 MB)
Building in Flood Zone – Mud Lake Road Area and Mud Lake – Climate Change under Open Water Condition (7.1 MB)
Building in Flood Zone – Town of Happy Valley-Goose Bay – Current Climate under Open Water Condition (5.0 MB)
Building in Flood Zone – Town of Happy Valley-Goose Bay – Climate Change under Open Water Condition (5.0 MB)
Flood Extent Maps – Current Climate – Town of Happy Valley-Goose Bay (15.0 MB)
Flood Extent Maps – Climate Change – Town of Happy Valley-Goose Bay (15.0 MB)
Depth of Flooding – Town of Happy Valley-Goose Bay (29.3 MB)
Flow Velocity – Town of Happy Valley-Goose Bay (29.3 MB)
Flood Hazard – Town of Happy Valley-Goose Bay (29.5 MB)
Comparison Current Climate and Climate Change – Town of Happy Valley-Goose Bay (29.3 MB)

2020/09
Town of Logy Bay – Middle Cove – Outer Cove Flood Risk Mapping Study

Mapping:
Logy Bay – Middle Cove – Outer Cove ESRI GIS File Geodatabase
AutoCad DWG

Models:
HEC-HMS Model (195 MB)
HEC-RAS Model (12.3 MB)

Public Information Maps
1:20 and 1:100 AEP Floodlines (252 MB)
1:20 and 1:100 AEP Ultimate Development Floodlines (251 MB)
1:20 and 1:100 AEP Climate Change Floodlines (251 MB)
1:20 (16 MB) and 1:100 (16 MB) AEP Inundation Floodlines

2012/08
Hydrotechnical Study of the Placentia Area Flood Plain

Mapping:
Placentia AutoCAD not available   Public Information Map Small Large PDF

Assessment of the Effects of Development in the Bruley Area of Placentia (1987)

Figure SK_1.jpg Figure SK_2.jpg

Report on Reassessment of Economic Analysis for Flood Control Measures in Placentia (1988)

Map.TIF

Report on Raising of Brestwork Along Riverside Drive in Placentia (1988)

Map.TIF

1985/04
Historical Flooding Review and Flood Risk Mapping Study for Parson’s Pond

Mapping:
Parson’s Pond AutoCAD DWG   Public Information Map Small Large PDF

1988/12
Flood Risk Mapping Study of Portugal Cove, St. Philips and Outer Cove

Mapping:
Portugal Cove, St. Philips AutoCAD DWG   Public Information Map Small Large PDF
Outer Cove AutoCAD DWG   Public Information Map Small Large PDF
NOTE: Additional areas were mapped in the 2012 Logy Bay – Middle Cove – Outer Cove Flood Risk Mapping Study above

1996/03
Town of Portugal Cove-St. Philip’s Flood Risk Mapping Study

Mapping:
ESRI GIS Shapefile (3 MB)
AutoCAD DWG (55 MB)

Model:
HEC-HMS Model (10.5 MB)
HEC-RAS Model (29.1 MB)

Public Information Maps
1:20 and 1:100 AEP Floodlines (175 MB)
1:20 and 1:100 AEP Climate Change Floodlines (177 MB)
1:20 and 1:100 AEP Inundation Floodlines (78 MB)
1:20 and 1:100 AEP Velocity Distribution Floodlines (76 MB)
1:20 and 1:100 AEP Flood Hazard Floodlines (78 MB)

2015/05
Rushoon Flood Study Report

Mapping:
Rushoon AutoCAD DWG   Public Information Map Small Large PDF

Rushoon Supplementary Report (1987)

Figure 4_5.jpg Figure 4_6.jpg

Investigation of 1989 Winter Flood in Rushoon (1990)

1986/06
Flood Risk Mapping Project for Shearstown/Bay Roberts Area

Mapping:
Shearstown ESRI GIS File Geodatabase
AutoCAD DWG

Models:
HEC-HMS Model (7.6 MB)
HEC-RAS Model (20.5 MB)

Public Information Maps
1:20 and 1:100 AEP Floodlines (68 MB)
1:20 (68 MB) and 1:100 (68 MB) AEP Climate Change Floodlines
1:20 (2 MB) and 1:100 (2 MB) AEP Inundation Floodlines

2012/03
Hydrotechnical Study of the Steady Brook Area

Mapping:
Steady Brook AutoCAD not available   Public Information Map Small Large PDF

Study of Possible Remedial Measures for the Steady Brook Area (1986)

Figure 1_2.jpg

1984/10
An Evaluation of Flooding in Stephenville, Newfoundland

1975/12
Hydrotechnical Study of the Stephenville Area

1984/02
Flood Risk Mapping Study of Stephenville, Kippens and Cold Brook

Mapping:
Cold Brook AutoCAD DWG
Kippens (Gaudon’s Brook)  AutoCad not available Stephenville  AutoCAD DWG (2005)

Public Information Maps
Cold Brook and Kippens (Gaudon’s Brook) Small Large PDF
Stephenville Small Large PDF

1996/05
Hydrotechnical Study of Stephenville

Mapping:
Stephenville and Cold Brook ESRI GIS File Geodatabase   AutoCad DWG

Models:
HEC-HMS Model (7.3 MB)
HEC-RAS Model (19.6 MB)

Public Information Maps
Stephenville 1:20 and 1:100 AEP Floodlines  1:100 AEP Climate Change Floodline
Cold Brook 1:20 and 1:100 AEP Floodlines  1:100 AEP Climate Change Floodline

2009/03
Hydrotechnical Study of the Stephenville Crossing And Black Duck Siding Area

Mapping:
Stephenville Crossing And Black Duck Siding AutoCAD not available

Public Information Map Small Large PDF

1988/05
Hydrotechnical Study of Stephenville Crossing/Black Duck Siding

Mapping: Stephenville Crossing
ESRI GIS File Geodatabase
AutoCAD DWG

Models:
Stephenville Crossing and Black Duck Siding HEC-HMS Model (1.8 MB)
Stephenville Crossing HEC-RAS Model (35.1 MB)
Black Duck Siding HEC-RAS Model (4.5 MB)

Public Information Maps
1:20 and 1:100 AEP Floodlines (326 MB)
1:20 (97 MB) and 1:100 (97 MB) AEP Climate Change Floodlines
1:20 (4 MB) and 1:100 (5 MB) AEP Inundation Floodlines

Black Duck Siding
ESRI GIS File Geodatabase
AutoCAD DWG

Public Information Maps
1:20 and 1:100 AEP Floodlines (100 MB)
1:20 (100 MB) and 1:100 (99 MB) AEP Climate Change Floodlines
1:20 (5 MB) and 1:100 (5 MB) AEP Inundation Floodlines

2012/03
Flood Risk Mapping Study of Trinity South Area

Mapping:
Shoal Harbour AutoCAD DWG and Hodges Cove AutoCAD DWG  Public Information Map Small Large PDF
Hickmans Harbour    AutoCAD DWG  Public Information Map Small Large PDF

1995/04
Flood Risk Mapping Study of the Trout River Area

Mapping:
Trout River AutoCAD not available   Public Information Map Small Large PDF

1990/05
Hydrotechnical Study of the Waterford River Area

Mapping:
Waterford AutoCAD not available  Public Information Map Small Large PDF

Updated Flood Extents for the Waterford River October 1998 (6.5 MB)
Updated Flood Extents for the Waterford River October 1998 AutoCAD (6.2 MB)
Updated Flood Extents for the Waterford River Mount Pearl Revisions 2001 2004 (0.08 MB)

1988/06
Waterford River Area Flood Risk Mapping Study NEW!!

Mapping:
ESRI GIS File Geodatabase (1.06 GB)
AutoCAD DWG (3.6 MB)

Models:
HEC-HMS Model (67.5 MB)
HEC-RAS Model (513 MB)
Updated South Brook HEC-RAS Model (523 MB)

Public Information Maps
1:20 and 1:100 AEP Floodlines (31 MB)
1:20 and 1:100 Climate Change Floodlines (31 MB)
1:20 and 1:100 AEP Inundation Depth Floodlines (48.2 MB)
1:20 and 1:100 AEP Velocity Distribution Floodlines (54 MB)
1:20 and 1:100 Climate Change Velocity Distribution Floodlines (57 MB)
1:20 and 1:100 AEP Flood Hazard Floodlines (58 MB)
1:20 and 1:100 Climate Change Flood Hazard Floodlines (58 MB)
1:20 and 1:100 Updated AEP Floodlines for South Brook (7 MB)
1:20 and 1:100 Updated Climate Change Floodlines for South Brook (7 MB)
1:20 and 1:100 Updated AEP Inundation Depth Floodlines for South Brook (13 MB)
1:20 and 1:100 Updated AEP Velocity Distribution Floodlines for South Brook (11 MB)
1:20 and 1:100 Updated Climate Change Velocity Distribution Floodlines for South Brook (11 MB)
1:20 and 1:100 Updated AEP Flood Hazard Floodlines for South Brook (12 MB)
1:20 and 1:100 Updated Climate Change Flood Hazard Floodlines for South Brook (12 MB)

2018/08