WELL DRILLING

Well Drilling

New Wells & Pumping Systems
The price of a new well varies, based on well type (screened or bedrock), well depth and size of the well. Most residential wells have 4" diameter casing.

A screened well ends in a sand/gravel formation that is deep enough to provide proper water production. The State of Minnesota allows the use of PVC well casing with a screen for this type of well, because the driller does not have to drill inside the casing after it has been set in the ground. A screened well is less expensive, because it is usually not as deep as a bedrock well, and has PVC casing, which is less expensive than steel casing.  

A bedrock well (open hole well) extends into a hard crevice formation that will provide proper water production. The State of Minnesota requires steel casing for this type of well because, after the casing is set, the driller must go down through the casing and drill the open hole.

Our goal is to find an abundant water supply for your well, at a reasonable price to you. To provide the most accurate estimate possible, T.L. Stevens Well Company researches ground geology near the new well site. This helps determine the well type and well depth. If both screened and bedrock wells exist in the same area, the exact well type cannot be determined until the driller sees the actual ground geology. In this case, we provide cost estimates for both well types.

Choosing a knowledgeable well contractor is crucial to your water well investment. Below are our company standards, which provide the best water systems to our customers.
LOCATION:The well should be located in an area that is easily accessible for future well work, but also in a safe location so the well will not be hit by cars, snow plows, etc. The top of the well should be 12” above ground, after final grade has been done, to prevent groundwater runoff from entering your well. The well location must comply with state regulations. Isolation distances can be viewed at: www.health.state.mn.us/divs/eh/wells/ruleshandbook/isolation.pdf

WELL SCREEN:Proper placement of the screen is determined by the driller and is set in the most porous ground material. The advantage of screen over slotted pipe is that a screen allows better water flow into the well and does not plug up as easily. T.L. Stevens Well Company installs 3” V-wrapped screens with K-packers; not just slotted pipe or smaller 2” screens.

WELL DEVELOPMENT:After the well has been completed, it must be developed to achieve the best possible performance. Developing is usually done by airlifting and high pressure jetting the well. This procedure forces loose sand, mud, and gravel to the surface; leaving the bottom of the well clean from debris that could plug the screen and restrict water flow into the well. T.L. Stevens Well Company will develop your well for as long as needed to produce the best possible water quality and quantity.
GROUTING THE WELL: Proper sealing around the well is accomplished by forcing a sealant between the drilled hole and the outer well casing (annular space) to prevent the water from becoming contaminated. If this is not properly done, water can travel down the outside of the well casing, into the aquifer and can contaminate the well water with nitrates, bacteria and other pollution from ground water runoff.

PITLESS UNIT: A pitless unit is made of steel and extends from 1’ above ground to 5’ below ground. Its purpose is to make a sealed, sanitary, frost-free, water-tight connection between the well and the house, and to keep the waterline from freezing. With a pitless unit, the water flows from the well to the house below the frost line. Since the unit is made from steel, it is stronger and better protects the well head from damage. T.L. Stevens Well Company installs pitless units. Other well companies may use pitless adapters, which we consider an inferior application.

A pitless adapter mounts directly onto the plastic well casing. When a pitless adapter is used, it is the plastic well casing that extends 1’ above ground. This PVC well casing is vulnerable to UV sunlight which will break down the plastic and may eventually weaken it, thus causing well repair to be needed. A pitless adapter is also more prone to leak.
WATERLINE & WIRE: The waterline to the house should be 160# poly pipe or better. 100# poly pipe is weaker and more vulnerable to damage. 12 gauge, or larger, UF wire should always be used. Never use NM-B household wire, because it is not designed for underground applications. All underground fittings should be brass. Galvanized fittings will corrode and eventually leak. Brass fittings will not. T.L. Stevens Well Company uses 200# poly pipe, 12 gauge UF wire and all brass fittings underground, whereas other companies may use inferior materials.

PUMPS: The size of your pump is determined by a combination of factors; well production, water usage, drop pipe size, static water level and pressure needed. Biggest is not always best. A knowledgeable well company will look at manufacturer's pump curves, and install the correctly sized pump for the application. If the pump is undersized you will have low water volume, low water pressure and the pump will not last long, because it is constantly being overworked. If the pump is oversized, it will start and stop too often. Frequent cycling will cause failure to electrical components (fuses, switches, contacts, etc.) much faster, the power usage is greater, and the life expectancy of an oversized pump decreases. It will also water hammer (sudden pressure spikes), which is hard on the pump and plumbing.  

There are 2 types of pumping system. The constant pressure system is far superior to the 50-year-old technology using the standard pump and pressure tank. You can take showers, run the dishwasher, flush the toilet, etc., at the same time without experiencing major pressure loss; plus you will not experience extreme temperature changes in the water like you will with the standard pumping system. This quiet constant pressure system has a gradual start/stop, which helps prolong the life of the pump, pipes and fixtures. The pressure tank is wall mounted and takes up a lot less space in the utility room. This system will quietly deliver the same water pressure throughout the entire home.

The standard type pumping system operates on 40-60 PSI, which means that the pump supplies water to the pressure tank until the pressure reaches 60 PSI. The pump does not replenish the water supply until the pressure drops to 40 PSI. The 20 pound pressure loss will be noticeable when you are taking a shower and other sources are demanding water at the same time. This pump has an instant on/off which is harder on the pump, pipes and fixtures.

PRESSURE TANKS: The pressure tank should be sized properly for the water system. A tank which is too small will cause the pump to start/stop too often, which reduces the life expectancy of your pump. A tank which is too large is not necessary, will waste installation time, take up more space in the utility room, and the tank will cost more without serving any real benefit. Your water will not be as fresh because more water is held in a larger tank.

PLUMBING: All plumbing should be properly sized and neatly installed. RO lines for a future system can be installed.

WATER TREATMENT EQUIPMENT: Be sure your water is tested to determine the degree of iron and hardness, before any equipment is installed. Undersized equipment will fail prematurely. Determine GPM (gallons per minute) output of treated water. Internal inlet/outlet ports of the unit may restrict water flow, if too small.

IRRIGATION SYSTEMS: An irrigation specialist needs to know how many gallons per minute your well and pump will continuously supply. This GPM figure will determine the number of zones your irrigation system requires, and their on/off time configuration. Too many zones sprinkling at the same time will cause excessive stress on your pump, thus shortening its life.

MINNESOTA DEPARTMENT OF HEALTH: The “Well owner's handbook – A consumer's guide to water wells in Minnesota” can be found by going to the below web address:


If you have questions or want further information, please feel free to contact us.
     Call us at 763-479-2272
     Email us at tlswellco@frontiernet.net
    Contact us through our website's contact page. We are happy to answer any questions you may have about your water system.
We offer quality water well repair services.
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