The document summarizes a drainage system design project for a field at Waterman Farms. The design includes installing a new main and laterals in the southeast field to drain 27 acres. The main will be split between 650 feet of 6-inch pipe and 550 feet of 8-inch pipe. There will be 22,230 feet of 4-inch laterals placed at 50 foot centers. The estimated total cost is $16,651.39. Deep spots may require an excavator for installation.

1. Waterman Drainage Project
Andrew Motycka
Christopher McChesney
10-20-13
Motycka/McChesney

2. Executive Summary
In this project we designed a drainage system for the Southeast Field at Waterman Farms. This
will be a subsurface drainage system to include installing a new main and all laterals. The main
and laterals will have to be in appropriate slope and velocity parameters when applied. The
economics will include costs of materials, labor, design, and installation.
There is one obstacle that we will have to overcome with this field, and that is that there is a
parking lot along Lane Avenue that drains directly into the field. We had to figure out how
much water we could expect to come off of this parking lot and take that into consideration
when sizing our laterals and mains.
Motycka/McChesney

3. Table of Contents
1.)
Title Page
2.) Executive Summary
3.)
Table of contents
4.)
Site description
5.)
Objectives and scope
6.)
Design Solution
7.)
Inventory
8.)
Economics
9.) Swot Analysis
10.)
Summary and Conclusion
11.)
Bibliography
Motycka/McChesney

4. Site Description
The site is the southeast field at Waterman Dairy Farm. This farm is located on the corner of
Kenny Road and Lane Avenue in Columbus, Ohio. The soils in the field include Crosby silt loam
and Kokomo silty clay loam. The maximum slope in the field along the length of the laterals is
1.75%. The climate is a typical Ohio climate which is temperate, getting a fair amount of rain in
the summer compared to the rest of the U.S. The field is on a corn and soybeans rotation.
There is no pre-existing main and the outlet is a creek to the North of the field. There is also a
parking lot along Lane Avenue that drains directly into the field.
Motycka/McChesney

5. Objectives and Scope
The objective of this project is to create a practical and operational subsurface drainage system
for the southeast field at Waterman Farms. This is to include design and economic analysis to
determine the cost of the design. The scope of work included taking a topographic map of the
area to layout the laterals and where the main will run. Once the general layout of the main
and laterals were achieved, profiles were done to see if the slope would be in acceptable limits
to give proper water flow velocities. Once this was determined, we determined the water flow
based off of the drainage coefficient, and sized our main and laterals. The last thing that was
achieved was determining the cost of the project based off of the size of material needed,
labor, and design costs.
Motycka/McChesney

6. Design Solution
From Standard 606, we got a drainage coefficient of .5 for field crops in mineral soils. We chose
a generic size of 50 ft. centers for our laterals, which is acceptable in the state of Ohio. The
laterals were sized to be 22,230 feet of 4 inch cpt, while the main was split to be650 feet of 6
inch cpt and also 550 feet of 8 inch cpt. The main will be ran at a slope of .77% which gives us a
safe water velocity. There are a total of 21 lateral connections and one connection going from a
6 inch main to a 8 inch main. We had a maximum depth of 7 feet, which might require an
excavator to be brought in to dig. On the main there is a minimum of 2.5 feet of soil cover to
the top of the pipe. On the laterals, there is a minimum of 3.5 feet of soil cover to the top of the
pipe. We are draining 27 acres total.
Motycka/McChesney

7. Inventory
Item
4in Single wall CPT
6in single wall CPT
8in Single wall CPT
8in Double wall CPT
4in Internal Caps
4in Taps
6in Internal Cap
8in to 6in Reducer
8in coupler
Gravel
Design and Layout
Motycka/McChesney
Amount
22230 ft
650 ft
550 ft
20 ft
21
21
1
1
1
800 lbs
27 ac

8. Economics
Item
Amount
Price/amount
4in Single
wall CPT
6in single
wall CPT
8in Single
wall CPT
8in Double
wall CPT
4in Internal
Caps
4in Taps
6in Internal
Cap
8in to 6in
Reducer
8in coupler
Gravel
Design and
Layout
Total
22230 ft
Motycka/McChesney
$.31/ft
Instal
Price
$0.30
Total
$ 13,782.60
650 ft
$.80/ft
$0.60
$
550 ft
$1.42/ft
$0.80
$ 1,221.00
20 ft
$3.45/ft
$0.80
$
292.00
21
$0.87
$
18.27
21
1
$3.68
$2.65
$20.00
$
$
97.28
2.65
1
$7.42
$20.00
$
27.42
1
800 lbs
27 ac
$6.97
$0.004
$10.00/ac
$20.00
$
$
$
26.97
3.20
270.00
910.00
$ 16,651.39

9. SWOT Analysis
One of the weaknesses of our project is that the main is very deep at spots. We had to do this in
order to keep the main at a reasonable grade; however, this may require an excavator to be
brought in to dig the deep spots out. Another weakness is that the laterals are very deep at
spots. This also may require an excavator.
One of the strengths of our project is that it is a very simple design. With all of the laterals
running the same direction and only one main, this will be very easy to install. This may save
some labor costs. It will also cut down on the possibility of human error while installing.
Motycka/McChesney

10. Summary and Conclusions
This design is very practical and simple. It will work for the time being and will work well. The
main is a little deep at spots, but it should not take long to use an excavator to dig it out and
should not be a problem. The system is also very easy to add to if further ground is added in the
future. However, we did not oversize the main, so a bigger main may need to be installed in the
future. Also, it is recommended that control drainage be used in the future as the prices of
agricultural commodities rise. If the opportunity arises, I would buy the parking lot and till it
under for farm ground. We are draining it as it is anyways.
Motycka/McChesney

11. Bibliography
“Subsurface Drain Code 606.”Natural Resources Conservation Service. May 2002. Pages 1-13.
“Subsurface Drain Design Charts.”EFH Ohio Supplement. May 2005. Issue 1.Pages 1-9.
“Web Soil Survey.”United States Department of Agriculture Natural Resources Conservation
Service.Website. 10-2-13.
Motycka/McChesney