Midland gets little rain, and that is exactly why storm drainage gets underestimated. The National Weather Service gives the city a normal annual precipitation of 13.51 inches, but a single thunderstorm can drop a meaningful share of that in an hour onto parking lots and roofs that shed water instantly. Flat ground and hard surfaces leave the water nowhere to go unless a designed system takes it.
A storm drain system collects that runoff in inlets, carries it through pipe, and discharges it to a pond, a channel or a street. On a commercial pad the system affects everything around it, from the finished elevation of the lot to the location of the curbs and the slope of the paving. Getting it wrong means standing water at the front door and a failed final inspection.
Concrete Contractors of Midland coordinates trade partners for excavation and pipe installation, and concrete trade partners place the inlets, curbs, flumes and pavement that make the drainage work. We tie the whole sequence to the owner's pour calendar, so an inlet is never poured at an elevation that the paving crew later has to fight, and a pipe run is never buried before the engineer has confirmed its slope.
Why drainage decisions have grown more important
Development in Midland is dense and fast. The City of Midland broke ground on October 29, 2025 on a terminal expansion at the airport that adds four TSA checkpoint lanes, expandable to six, as part of $150 million in city improvements, with completion expected in 2027. Large construction projects like that turn pervious ground into roofs and pavement, and each acre added changes how runoff is handled downstream.
Downtown Midland shows the other side of the story. Its assessed value is $67.3 million per acre, about triple any other part of the city, according to the consultant cited in the city's release. In districts where land is that valuable, owners often want to minimize the space given to ponds, and engineers respond with underground detention and larger pipe. We plan the concrete work for those systems with care.
Where we mobilize for drainage-driven work
We work on commercial pads along Loop 250 and SH 349, in the area around the airport and on industrial parcels around the county. Each area has its own outfall conditions. Some sites drain to a street, some to a regional channel and some must hold the runoff on site.
Near the airport, in the airport area, there are extra constraints on standing water, since ponds can attract birds and airport owners care about that. We ask early about requirements for the site and place that question in the design review.
Elevations, soils and the path of the water
The first step is the grading plan. We trace the path of water from every roof drain and every paved area to its outfall, and we look for low spots between the building and the inlet. Where the grade has little room, even a half-inch error in the slab or curb elevation can undo the design. Concrete trade partners check forms against the plan before the pour.
Soils matter as well. Caliche can be hard to trench and often needs rock-capable equipment, while loose sandy pockets need bedding and compaction control to keep pipe from settling. Pipe material, whether reinforced concrete or plastic, is chosen by the engineer based on load, cover and cost, and we coordinate its delivery so the trench is not open longer than it needs to be.
Owners who rely on a working system
Oil, gas and midstream owners care about drainage that can handle spill containment, process area runoff and heavy truck traffic. A processing site has to separate clean stormwater from areas where fluids may collect, and the drainage design reflects.
Developers of retail and office sites focus on the customer experience, which means dry parking and clean entries. Industrial and warehouse owners want truck courts that drain fast and do not freeze in a puddle. In each case we ask the owner what a failure would look like, and we design the schedule to prevent it.
Drainage by building type
A retail shopping center has many small inlets, curb openings and sidewalk culverts spread across the lot. A warehouse has large roof areas and a truck court that must pitch away from dock doors. A medical or office building has smaller footprints but demanding accessibility requirements at the entries.
Each type changes how pipe, inlets and paving fit together. We read the architectural and civil sets side by side to find conflicts such as a downspout that lands on a walkway or an inlet in the path of a loading ramp. Catching these early costs a drawing revision. Catching them later costs a saw cut.
Storm drain work that connects to other scopes
Storm drains rarely stand alone. They feed detention and retention ponds, discharge through culverts and headwalls and often share a trench corridor with other utilities. On slabs and docks, trench drains and concrete drainage pick up where the underground system leaves off.
Coordinating these elements together avoids conflicts in elevation and keeps each trade from working over the previous one. We schedule inspections so each section is accepted before the next begins, and we keep a running list of open items so nothing is forgotten when the paving crew arrives.
What drives the cost of a storm drain
Pipe size and length are the obvious factors, but depth, rock, dewatering and the number of structures often matter more. A short run through caliche can cost more than a long run through soft soil. Traffic control and street repair add cost when the system connects to a public right-of-way.
Owners can also help by keeping inlets close to the building and by locating outfalls where they do not require long runs. We provide a clear breakdown of the pipe, structures, concrete and restoration so the owner can see where value engineering is possible. We also note which cost items are fixed by regulation and which are open to choice, because owners deserve to know which line items they can actually negotiate before a bid is accepted.
Coordinate drainage with paving
Send us the civil and grading sheets. We will map the inlets, pipe runs and outfall against the paving schedule and return a written sequence.
Common Questions
Do small sites need a storm drain system?
Many do, even if the lot is small. The city or the engineer decides based on the area, the slope and the outfall. Some sites can drain across paving to a swale, while others need inlets and pipe. We follow the approved plans.
How is the system inspected?
Inspections cover bedding, pipe in place, structures and backfill, and often a final walk-through. The city or the engineer's representative schedules them. We request each visit ahead of time so the crew is not idle.
Can storm drain work be done in summer heat?
Yes. We start earlier, schedule the heaviest labor in the morning and protect concrete structures from rapid drying. Pipe work can continue as long as the crew has water, shade and breaks.
What happens when a heavy rain falls during construction?
Open trenches are protected and pumped as needed, and we log the water level and the time so the engineer can judge whether bedding was disturbed. We check structures for debris, and the engineer reviews any damage to bedding or grade. A rain event is also a good moment to confirm that the drainage design works as intended.