Drainage work in Midland starts on flat ground that looks as though it has no drainage at all, until a hard storm proves otherwise. Draws and low swales carry water across the landscape, and every road, driveway or lease road that crosses one needs a culvert. The pipe is the visible part. The headwall at each end decides whether the crossing survives its first flood.
A headwall holds the pipe in position, retains the soil around it and guides water into and out of the opening. Without one, flowing water undercuts the fill, the pipe shifts and the crossing washes out. With wingwalls and an apron, the same water is directed along a path that the soil can tolerate.
Concrete Contractors of Midland places headwalls, wingwalls, aprons and cutoff walls for owners, developers and operators, and coordinates trade partners for excavation, pipe and backfill. We tie the work to the road or driveway schedule so the crossing is ready before traffic is.
Design standards and approvals
Culverts on public roads follow the road authority's details, while private crossings follow the project drawings and the drainage report. Reinforced concrete pipe, box culverts and corrugated pipe each have different bedding and cover requirements. The engineer sets size, slope, headwall type and apron length.
Work in a drainage easement or floodplain may need a permit. We ask the owner and engineer for the approvals before pricing and put them in the schedule.
Owners in municipal and public works usually have a standard detail set and a review process of their own, and we match both. Private owners benefit from the same discipline even when no agency requires it, because a documented design is easier to defend if a neighbor later asks about drainage.
What we place and what we coordinate
Concrete trade partners form, reinforce and place headwalls, wingwalls, aprons, toe walls and flumes. They also pour concrete collars at pipe joints and end sections where the design calls for them. Finishing is done with attention to edges and drainage lines.
Excavation, pipe setting, bedding and backfill are handled by trade partners that we coordinate. We do not claim to be the earthwork contractor, and we make sure the people who are can work to our schedule.
On remote crossings we mobilize crews with forms, steel and a plan for concrete delivery, and we confirm the haul from the batch plant before the pour. A headwall that needs its pour completed in one placement cannot wait on a truck that is an hour late.
Size, depth and flow
Cost follows pipe diameter, length, cover and the number of barrels. A single small pipe with simple headwalls is a modest job, while a multi-barrel box with long wingwalls is a major structure. Concrete volume is mostly in the walls and apron, and reinforcing is a large share.
Site conditions shift the price. Hard caliche slows trenching, and soft soil may need over-excavation and replacement. Our bid lists those assumptions, which shows the owner the effect of any change in conditions.
Delivery is its own line item. Precast sections, if used, travel on oversize loads, and the crane needed to set them adds a day to the schedule. We compare precast and cast-in-place options when the design allows both, and we say which is likely to cost less at the quantity involved.
Sequencing a crossing
We start by locating the flow line and checking invert elevations. After the trench is excavated and bedded, the pipe is set to line and grade and checked. Headwall forms are built to the drawings, reinforcing is placed and inspected, and the concrete is placed in a single sequence where possible.
Backfill is placed in lifts and compacted beside the pipe and walls, taking care not to damage fresh concrete. Aprons and riprap are placed last. We record elevations for the as-built set.
Between steps we hold short checks on reinforcing, cover and embedment, and we photograph the formwork before the pour. When the engineer or inspector asks how deep a toe wall goes, the answer is in the file.
Corridors where crossings multiply
Large corridor projects create many crossings. Loop 250 is a 12.245 mile bypass along the west, north and east edges of Midland, running from I-20, SH 158 and SH 349 in southwest Midland to I-20 east of the city. TxDOT is also planning to reconstruct and widen I-20 in Midland County from east of FM 1208 to east of SH 349, about 12.8 miles, with 26.3 acres of added right-of-way.
Each widening changes how water leaves the roadway, and neighbors on the service roads often add their own drives and culverts to reach new land. Private owners near these corridors need to coordinate their drainage with the state project.
For operators who maintain roads on lease acreage, the same logic applies at smaller scale. Our oilfield service yard areas page describes the kind of ground where crossings are routine and truck loads are heavy.
Services linked to culverts
Culverts feed into storm drain systems and discharge to detention and retention ponds. On sites with significant grading, mass grading sets the flow lines before the culvert is built. Erosion control protects the outlet until vegetation or lining takes hold.
Coordinating these elements prevents conflicts. A culvert placed before the final grade is set may end up too high or too low.
Timing the crossing
Culverts should go in before the road or driveway is built above them. If a crossing is delayed, the road crew waits or builds a temporary detour. We schedule pipe delivery, trenching and concrete work so the crossing is open to traffic when the paving crew arrives.
Concrete needs time to gain strength before it carries load, so we plan for cure time before backfill and before heavy equipment crosses. Rain is rare but fast, so we avoid leaving open trenches overnight when a storm is forecast.
Where culverts appear
Culverts support access to warehouses, truck terminals, plants and pad sites, where a drive must cross a drainage way. Lease roads serving oil and gas pads cross draws and ditches often, and the crossings must handle heavy trucks.
On a campus or office site, a culvert may be hidden under a landscaped entrance and its headwalls may be finished to match the architecture. We discuss appearance with the owner when the crossing is visible.
Schedule the crossing early
Send us the drainage report and the road or driveway plan. We will return a written sequence for pipe, headwalls and backfill.
Common Questions
Who decides the culvert size?
The engineer calculates it from the area drained, the expected rainfall and the allowable water level at the crossing. We follow the sizing on the drawings and raise any field conditions that differ from the design.
Are headwalls always necessary?
Not always. Small private crossings may use end sections or sloped ends, but headwalls are standard where soil retention or flow control matters. The engineer decides.
Can a culvert be installed during dry weather and still work in a storm?
Yes. In fact, dry weather is the best time to install it. We stabilize the inlet and outlet and protect the work so it performs when the first heavy rain arrives.
How long does a culvert crossing take?
A small crossing can be done in a few days, including cure time. A larger box culvert may take weeks. Delivery of precast sections, if used, can change the schedule.