Underground lines in Sunnyvale are being rebuilt and extended while roads above them are widened, and developers who plan a parcel here need a contractor that can sequence trenches around that public work. We coordinate water, sewer, storm drain and conduit installation for private developers and municipal owners, supervising the trade partners who excavate, lay pipe, backfill and pour the structures that go with it.
The town's own project list shows how much is happening at once. TxDOT is reconstructing and expanding U.S. 80 between Lawson Road and Belt Line Road, and the town is moving utilities from Belt Line Road to Lawson Road, with completion estimated for November 2026. A private site that connects to those lines has to fit the owner's tie-ins around that work, which means planning bore locations, shutdown windows and inspection hold points with the town ahead of time.
We start with a survey of existing utilities, potholing where the drawings are unclear, and a trench plan that shows depth, bedding, cover and compaction testing. That plan lets the owner see where concrete structures such as manholes, vaults and headwalls fit into the sequence, and where a concrete cap or encasement is required over a shallow crossing.
Locate, trench, bed, test, cover
Underground work goes wrong when lines are not where the plans say they are, and the cost of a surprise is a day of idle equipment plus a repair. We pothole critical crossings, mark existing utilities, and stage excavation so trenches stay open for the shortest time possible. Trench safety is planned before digging, not after the walls start to shift, with shoring or sloping chosen for the depth and soil. Competent-person inspections are logged every shift.
Bedding and backfill follow the approved details, with compaction tested in lifts. Pipe is tested for leaks or pressure as the spec requires, and manholes and structures are inspected before the trench is closed. Concrete collars, thrust blocks and encasements are poured by trade partners and checked against the drawings.
Services that go with the pipe
Utility work rarely stands alone. We coordinate water main installation, sanitary sewer installation and electrical duct banks in the same trench plan where the design allows, which reduces open length and the number of times a street is cut.
We also handle the surface restoration that follows: curb and gutter, driveway approaches and pavement patches. The owner receives a finished surface along with the buried line. Where a commercial driveway crosses a new line, we plan the concrete section over it so it does not settle or crack. For owners of retail centers and similar sites, that restoration is what customers actually see on opening day.
Public projects shape private schedules
A federal community project funding request on the town's behalf would replace the two-lane asphalt Collins Road with a four-lane divided concrete thoroughfare running from E. Tripp Road to Town East Blvd. The request totals $9,760,500, and $6.5 million was earlier directed to it through FY24 appropriations. Concrete street projects like this one set the tone for adjacent development, and they require utility relocation first.
Developers with parcels along such corridors should expect street work, pipe work and private site work to overlap. We help owners sort which scopes must finish first, and we raise conflicts at the preconstruction meeting with the town and the engineer. Municipal and public works owners often set the order, and private developers do better when they plan around it.
Working beside roads and lake-edge ground
The town spans 16.79 square miles beside Lake Ray Hubbard, with ground at 486 feet, so trenches may meet clay, groundwater near drainage ways and variable fill. We plan dewatering where needed and stabilize trench bottoms before pipe is laid.
Working beside public roads brings traffic control, driveway access and public notice requirements. We coordinate those items with the town and with the state agency where a state route is involved. Where lake-edge soils are soft, we over-excavate and replace with compacted select fill so pipe grade holds over time, and we log the depth and material.
Sequencing around public work
A water line replacement, drainage improvement and pavement rehabilitation on East Tripp Road, between Collins Road and East Fork Road, was awarded on May 12, 2025 for $5,184,909, so utility work is already underway in that part of town. For a private developer, public work like this can influence the availability of utility trade partners and the timing of road closures.
We plan material orders early, because pipe, structures and concrete lead times matter, and we phase connections so water and sewer service is never interrupted without notice. Pours for manholes, vaults and headwalls are scheduled for mornings in hot weather, and cold or wet days move to the next window rather than risk poor curing.
What an underground package includes
A typical scope covers clearing, rough grading, trench excavation, bedding, pipe installation, structures, backfill, testing and restoration. For drainage-heavy sites we add storm drain installation, inlets and headwalls, and on larger sites we add detention or outfall work.
We also coordinate the concrete items that finish the job: inlet tops, valve collars, pads for transformers and meter vault lids. Each is formed to the detail, reinforced where required and cured before traffic is allowed over it. The scope list is written so the owner can see every item, which avoids disputes about what was included.
Town review and inspection
The town reviews utility plans, and the water, sewer and drainage designs must meet its standards before construction begins. Connections to public lines usually need permits and an inspector present at tie-in, and some pressure tests need witnessing.
We assemble the submittals, track comments and schedule inspections with the trade partners. The goal is that no pipe is covered before the inspector has signed off. We also keep as-built records of depths and locations as the work proceeds, so the owner has an accurate drawing set when the project closes and the next contractor does not have to guess.
Send us your Sunnyvale utility plans
Share the utility plans, survey and target tie-in dates. We will price trenching, pipe, structures and restoration separately and explain how the work fits around current public projects near Mesquite and Balch Springs.
Common Questions
How do you avoid conflicts with existing utilities?
We request locates, review as-built drawings and pothole critical crossings before excavating. Where a line is shallow or uncertain, we adjust the trench plan or sleeve the crossing in concrete.
Can you work around the highway reconstruction?
We coordinate with the owner and the town to schedule tie-ins, road crossings and lane closures so they do not conflict with the public work. Dates remain tentative until the agencies confirm them.
What is the difference between a storm drain and a detention pond?
Storm drains convey runoff through pipes and inlets, while a detention pond holds runoff and releases it slowly. Many sites need both, and we build them in a sequence that keeps the site dry during construction.
Who tests the pipe and the backfill?
Compaction is tested by an independent lab, and pipe is tested as the spec requires, with the town inspector witnessing as needed. We schedule the tests and keep the reports.
Do you restore the pavement after trenching?
Yes. We coordinate the base repair, concrete or asphalt patch and curb work, to match the town standard and the owner's requirements.