On fast-growing ground, the first question for a developer or builder is where the water goes. In the Savannah community we build the earthwork that answers it: grading to the engineer's elevations, detention basins and outlet structures, swales, inlets and culverts, with erosion controls in place before the first cut. The concrete that follows, from pads to pavements, depends on how well that work is done.
Savannah is unincorporated Denton County land north of US 380, twelve miles from Denton to the west and fifteen from McKinney to the east. Where a development spreads across open acreage, water has to be moved deliberately, and a grade error of a few tenths of a foot can leave a basin that does not drain or a pad that floods, so we verify elevations with survey control at every stage.
We schedule, coordinate and inspect the trade partners who strip, cut, fill, compact and shape the site. Soil conditions beneath future slabs are part of the same plan, since moisture in the subgrade is the main cause of slab movement on clay.
Flat ground, clay soil and a growing district
The community covers 0.93 square miles, all of it land, at an elevation of 584 feet. A compact area with no natural water body means that every detention basin, pipe and swale has to fit within the development, and that stormwater has to be carried to an outfall by design, not by the lay of the land. We study the drainage plan, the geotechnical report and the existing channels before grading starts.
The soil matters as much as the grade. Expansive clay swells in wet weather and shrinks in dry, so moisture conditioning and compaction of fill must be done carefully and the surface protected until the next phase. We schedule final subgrade work as close to the slab or paving as the weather allows.
District, county and state reviews
Huffines Communities markets a subdivision here that is contained wholly in the Elm Ridge WCID, a water control and improvement district. Projects in a district like that follow the district's standards for water, sewer and drainage, and they may also need county and state reviews, depending on the road, outfall or utility involved.
We find out which authority reviews what at the start. Grading and drainage plans, stormwater pollution prevention plans, floodplain checks and utility permits each have separate timelines, and we build a calendar that shows when each is needed. Inspection records and test reports are kept in the format reviewers expect.
Developers, builders and districts
Our drainage and grading work serves homebuilders and multifamily developers, commercial developers, general contractors and public districts. The census count rose from 3,318 residents to 6,529 between 2010 and 2020, a jump of 96.8 percent, and growth like that brings a sequence of projects: lots, streets, drainage, then retail and services.
Each buyer has a different priority. A homebuilder wants finished lots on a date, a district wants infrastructure that passes inspection and a commercial developer wants a pad with clean drainage and a stable subgrade. When more than one of them shares a drainage system, we coordinate grades at the property lines so one owner's fill does not send water onto another's lot.
Cut, fill and haul decide the price
The balance between cut and fill is the single largest driver. If a site needs imported fill, the haul distance and the quality of material add cost; if it has surplus, the cost of removal matters. Phasing a development so that soil is balanced between phases usually saves the most money. Stockpile locations, haul road maintenance and the time that open ground stays exposed also affect cost, and we raise them in the bid review.
Weather, rock and unsuitable soil add risk. We recommend allowances for undercut and replacement, and we price items such as engineered fill and soil stabilization separately so an owner sees the cost of each choice.
Safe and compliant open-ground work
Large earthwork sites use heavy equipment on moving ground. We plan haul routes, assign spotters, separate pedestrians from machines and keep slopes and basin edges within safe limits. Open basins are fenced when the public could reach them.
The stormwater plan is a compliance item and a safety item. Silt fence, inlet protection, stabilized entrances and basin outlet controls are installed before grading, inspected after rain and repaired promptly. Dust control matters on dry days, particularly beside occupied homes, and water trucks are scheduled so haul roads stay damp without turning to mud.
Earthwork and drainage package
The scope includes clearing, mass grading and fine grading, detention and retention ponds, outlet structures, storm pipe and inlets, swales and erosion controls, followed by building pad preparation for slabs and pavements. Compaction testing and as-built survey are part of the record. A basin is not finished until its final survey shows the volume, the outlet elevation and the side slopes the engineer called for, so we hold the release of that work until the numbers are in. Owners who later sell or refinance the property will be asked for that survey, and having it on file saves a return trip.
We also sequence moisture-sensitive steps. A prepared pad is covered or protected, and a final moisture check is made before steel is placed, so the slab does not rest on soil that has been rained on and softened.
A highway under reconstruction
A TxDOT fact sheet from October 2025 describes a $140 million widening of US 380 that begins east of US 377 and ends at the Collin County line. It adds grade separations at five points: Navo Road with Union Park Boulevard, FM 423 with Gee Road, FM 720 with Oak Grove Lane, Teel Parkway with Championship Drive, and Legacy Drive. Work of that scale changes drainage patterns, elevations at the frontage and the access points available to adjacent parcels.
Owners near Little Elm, Prosper or Frisco will see similar corridor growth. We plan grading so site drainage fits the highway design and not just the current ground.
Send the Savannah community plans
Share the grading plan, drainage report and soil report for your project in the Savannah community. We will return a clear scope and price for earthwork, detention and the site concrete that follows.
Common Questions
Why do small grade errors matter in drainage work?
Water follows the grades we build. If a swale, pipe invert or basin floor is set a few tenths too high, water stands and the design capacity is lost. We use survey control and check elevations at each step.
How does moisture affect a slab on clay?
Clay swells when wet and shrinks when dry. If the subgrade is uneven in moisture, the slab moves unevenly and cracks. We condition the soil, compact it, protect it and recheck moisture before the pour.
Can you build a detention basin to a district standard?
Yes. We follow the engineer's design and the district's standards for volume, outlet structure and side slopes, and we document the as-built elevations.
What happens if rain interrupts earthwork?
We stabilize the open areas, pump water from basins and trenches if needed and let soil dry to specification before compacting. The schedule includes allowances for this.