Midland is dry enough that dewatering surprises people. A footing excavation that was bone dry on Monday can have standing water on Thursday after a thunderstorm, a broken irrigation line or a leaking water main nearby. Concrete cannot be placed in water without a plan, and a trench that fills overnight loses its bedding and its inspection.
Dewatering is the practice of removing groundwater or surface water from an excavation so that work can proceed safely. It may be as simple as a sump and a pump in the corner of a footing, or as involved as an array of well points surrounding a deeper structure. The method depends on how much water is present, how fast it returns and where it can go.
Concrete Contractors of Midland coordinates trade partners for dewatering equipment and operation, and concrete trade partners place concrete on the dry subgrade that results. We bring the question into the pour calendar at the beginning, because the answer changes the schedule, the cost and the discharge plan.
What dewatering covers on a concrete project
The scope starts with identifying where water might come from: a rain event, a seep, a shallow groundwater zone, a utility leak or the neighboring irrigation. A geotechnical report, if the project has one, often records groundwater depths. Where it does not, a test pit or an observation during excavation gives the answer.
The dewatering plan then selects equipment: portable pumps and sumps for small volumes, well points or deep wells for sustained flow. Discharge, filtration and monitoring complete the scope. Concrete trade partners then check the subgrade, place any stabilizing base and proceed with forms, steel and concrete.
Related work that often falls under the same umbrella includes excavation support and protection of adjacent utilities. We tie dewatering to site utilities work, since utility trenches are where water most often appears.
Our potholing and locating work often reveals the source of unexpected water before the main excavation begins. A weeping joint on an old line is far easier to address when it is found on a Tuesday than when it floods a footing on Friday.
Planning for water that arrives on its own schedule
Water does not follow the calendar, so we build flexibility in. Pumps are on call or on site when excavations are open, and the pour is not scheduled until the subgrade has been inspected dry. If a storm is forecast, we protect the excavation with berms or covers and keep the pump ready.
Concrete placement has its own limits. A slab or footing placed over wet subgrade can lose strength and bond, so we confirm the base condition before ordering the first truck. When a delay is needed, we cancel with the supplier early to avoid wasted loads and to preserve the relationship with the batch plant.
Daily rhythm matters as well. Pumps that run overnight need fuel and a person checking them, and noise limits near offices or hospitals can restrict hours. We ask the owner about quiet periods and include fuel and monitoring in the calendar, so a dry morning does not depend on someone remembering to refill a tank.
Owners who need a dry excavation
Utilities and energy companies have deep trenches for pipe and cable, and their schedules depend on keeping those trenches open for the shortest time. Municipal owners often require detailed dewatering and discharge plans as part of public works contracts.
Industrial owners care about containment. Pumped water from a plant yard may carry oil or chemicals, so discharge needs to be handled carefully. We confirm with the owner what the water can contain and where it may go before any pump starts.
Campus and healthcare owners add a different concern: neighbors. Pumped water that runs across a drive lane can ice in winter or leave mud on tires, and a hose across a walkway is a trip hazard. We route discharge to avoid public paths and cover hoses where they must cross.
Control the water, then place the concrete
We treat dewatering as a sequence. First, divert surface water around the excavation with berms and ditches. Second, control groundwater with the least equipment that will do the job. Third, verify the subgrade by inspection and, where required, by testing. Only then do we release forms and steel.
We also watch what the water does to the soil around the excavation. Pumping that is too aggressive can pull fines through the subgrade and soften the base, and discharge that returns to the excavation defeats the purpose. A short daily log of pump hours, water levels and observations helps the engineer decide whether the method is working.
When the excavation is deep, shoring or sloping must be reconsidered as the water level drops, because a trench wall that stood while saturated may behave differently when drained. Concrete trade partners do not enter an excavation until the competent person on site has examined it after dewatering begins. We write that rule into the daily briefing.
Water supply and the ground around it
Midland's own water story shows how much groundwater matters here. The city's Paul Davis Well Field has 42 wells and serves peak demand and backup supply, while the McMillen Well Field is shut down over perchlorate concerns, and the city is also a customer of the Colorado River Municipal Water District. Water quality is a recognized concern, and it extends to what is pumped from construction sites.
Midland is served by Interstate 20, with Business I-20 following Wall Street, Front Street and former US 80, plus State Highways 158, 191 and 349 and Loops 40, 250 and 268. Trucks hauling pumps, tanks and filters move on those routes, and we plan deliveries to avoid peak traffic.
Where we mobilize dewatering support
We coordinate dewatering for projects in Midland and the nearby communities. The airport area, with Midland International Air and Space Port serving commercial flights and Midland Airpark serving general aviation on the northeast side, has its own rules about discharge and standing water. For more on that area, see our airport area page.
In small communities such as Coahoma and Lamesa, we confirm local requirements before work begins. Each town handles discharge and permits a little differently, and the answer influences the equipment we plan to use. A town without a storm system may need water hauled away or spread on site, which changes both the cost and the number of hours on the pour calendar.
Plan for water before you dig
Send the geotechnical report and the excavation drawings. We will return a written plan for pumping, discharge and the pour that follows.
Common Questions
Does Midland really need dewatering?
Often only in specific situations: after storms, near leaking lines or in deep excavations. Most sites are dry most of the time, but the exceptions are expensive when not planned for.
Where does pumped water go?
It depends on the quality of the water and the local rules. Clean water may be discharged to the ground or storm system with filtration. Contaminated water needs special handling. We confirm the allowed destination before pumping.
Who decides the method?
The engineer or the dewatering specialist selects it based on the soil, the depth and the volume of water. We coordinate the method with the schedule and the concrete work.
How does water affect concrete?
Placing concrete into water dilutes the mix and weakens the surface. Wet subgrade also reduces bearing and bond. We insist on a dry, firm base before placement.