1. Water Drainage Analysis
April 11, 2018
Trinity & Associates Ltd.
Professional Engineers
Street North
Ennytown, AB T1J 3Z4
(403)
Municipal address:
53062A Hwy 62
County of Cardston, AB
LSD:
-8-NE W4-
Trinity & Associates Members:
Tyson Baldrey
Randy Holmberg
Allan Johnston
Allan

2. Executive Summary
This report on the property at 53062A Hwy 62, County of Cardston, AB (LSD 8 – NE Sec 23, Twp 5, R 22, W4M)
identifies any potential drainage issues that may adversely impact the property due to flooding of the area
explores two possible design concepts that would reduce the risk associated with the issue(s)
Allan

3. company Information Trinity & Associates Ltd. Tyson Baldrey
Providing drainage conceptual analysis & solutions since 2014
Based in Lethbridge, AB
Offering service throughout Southern Alberta
Tyson Baldrey
Owner / Operator since 2014
Civil CAD Specialist
ASET Member since 2014
Randy Holmberg
Drainage Conceptual Specialist
Civil CAD Specialist
ASET Member since 2014
Allan Johnston
Drainage Consultant
Civil CAD Specialist
ASET Member since 2014
Allan

4. Location & Property
Property located LSD 8 - NE Sec 23, Twp 5, R 22, W4M
Municipal address: A Hwy 62 County of Cardston, AB
South of Magrath, AB
Allan
*images NTS
source: Bing Maps
source: Google Earth

5. Location & Property Analysis of SW corner of property
20 acres rural agricultural RA-zoned
Includes
Dwelling
Shop
Barn
2 livestock outbuildings
Drainage pond – Pothole Creek  Jensen Reservoir  SMRID
Allan

6. Possible Issues
High rainfall 1993, 2002, 2005 … > 350mm may cause flooding in some areas
Potential flooding in two zones 
Low collection area in NW corner 
Low collection area south of proposed roadway 
Allan

7. Information Provided – Location Observations & Property Owner Questions 
Client 
states no flooding issues have occurred during his ownership of property 
is concerned about drainage issue potential as result of 1-in-100-year storm 
is concerned about drainage impact of future development (i.e. shop) on drainage 
states existing culvert located within landscaped area west of house in crescent driveway area – however, potential for issue as culvert is not at lowest point 
Tyson

8. Information Found – Site Analysis
Ideal location for proposed shop – 52m north of NE corner of dwelling 
Limited grading needed 
Higher elevation than surrounding area 
Ideal location of driveway leading to proposed shop 
Will isolate low-lying area in NW corner of proposed area 
Smaller low-lying area south of proposed driveway, north of existing driveway  
Tyson

9. Information Found – Data & CAD Analysis
TIN confirms low-lying areas 
Tyson

10. Information Found – Site Analysis
CAD analysis 
arrows show slope and resulting drainage
colour gradient indicates elevation change (dark > high; light > low)
Linework indicates locations of structures & underground lines
Tyson

11. Possible Solution #1
Build proposed driveway as stated above – will create berm separating low-lying area from existing dwelling 
Install culvert under proposed driveway along southern point from SE to NW 
Install culvert under existing roadway to divert water from larger low-lying area to drainage ditch 
Randy

12. Estimated Cost of Work & Materials
Approximately 70m long x 4m wide @ average $2 / sq. ft. = 280m2 (3015 sq. ft.) = $6030 
Culvert 15” x 20’ = $280 x 2 = $560 
Rough guideline only 
Estimates are calculated using a suggested $2 / sq. ft. 
Randy

13. Possible Solution #2 (trash Pump)
To accommodate the 1 in a 100 year storm, it may be more cost effective to invest in a trash pump 
This has more mobility to move around to problem areas and can be mounted on a trailer 
Water can be transported to the Pond on the East of the property for emptying the tank, or you can have tank storage if the wishes.
Randy

14. Estimated Cost of Work & Materials
3" Trash Pump
Estimated cost: $1320 
Skid for tank mount - Free-$200
Fork Attachment - $300-$500
3” 50ft hose /w couplings - $120
3” Trash Pump ( GPM) - $400-$720
1 m3 Tank - $300
2” Trash Pump
Estimated cost: $1390
Skid for tank mount - Free-$200
Fork Attachment - $300 - $500
2” 50ft hose /w couplings - $70
2” Trash Pump ( GPM) - $520-$1430
1 m3 Tank - $300
Randy

15. References
Design Standards (pp , Tech.). (2014). Retrieved from: Coordination/Documents/Section3StormwaterManagement2014.pdf
Canada, Canadian Council of Ministers of the Environment. (1999). Canadian Water Quality Guidelines for Protection of Agricultural Water Uses (p. 15). Retrieved from: rcqe.ccme.ca/download/en/131
Rainfall over the Last 25 Years (annual data) for Lethbridge. (n.d.). Retrieved December 06, 2016, from
Agriculture and Agri-Food Canada. (n.d.). Description of soil ABMGTsa, Magrath. Retrieved April 6, 2018 from
Cost helper home and garden. (n.d.). Gravel driveway cost – How much does a gravel driveway cost? Retrieved April 8, 2018 from
Lowe’s Kalispell Products & Sales. (n.d.). ADS 15-in x 20-ft Corrugated Culvert Pipe. Retrieved April 9, 2018 from Pipe/
Oldman River Regional Services Commission. (2016, February 23). Town of Cardston, Canada Alberta Flood Hazard Identification Program. Retrieved from -Bylaw%201581).pdf
Randy