Jurupa Valley Concrete Pro pours drives, patios and slabs in Colton, 9 miles northeast of our Limonite yard. It is the closest town we cover in San Bernardino County, and its oldest concrete sits on sand.
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The Santa Ana River built this valley floor and then walked away. The survey maps the ground under downtown as Tujunga loamy sand and the flats to the south as frequently flooded river deposits.
That is the opposite problem from a clay town. Sand carries almost no water between its grains, so it does not swell in February and shrink by August, and a slab on it is not lifted by the season. What it does instead is move. Loose sand has no cohesion to hold a face, so it runs out from under an edge that was never thickened, and it carries water away so fast that anything relying on the subgrade staying damp is disappointed by the second summer.
So the work here is confinement rather than stabilisation. We compact the base in lifts instead of one lift, turn the perimeter of a slab down to 12 inches so the edge has a beam under it, and run number 4 steel through drives at 5 inches. Pour temperature matters as much: afternoons here pass 95 through July and August, and concrete that has crusted before the float reaches it is weaker right through, not only at the top.
Close to three homes in ten here were finished before 1960, and 1,431 of them before 1940, so what comes out is often older than the freeway that cut the town in half.
A drive on the downtown grid was laid in short panels over decades, unreinforced and straight onto sand, and the approach at the gutter has dropped. We take the run and the approach together, since a slab that failed from below is not repaired from above, and rebuild the base.
Sand is a good friend to a patio and a poor one to its edges. It drains after a storm instead of holding water, so nothing heaves, but it washes out from under an unthickened edge until a corner drops. We turn the perimeter down 12 inches and pitch the fall away from the house.
The tracts north and west of downtown went up in the 1980s, the biggest decade of building this town has had, and their aprons and entries are now due. Stamped patterns go into a 4 inch slab rather than onto it, so summer heat cannot lift a surface layer off the concrete below.
The fronting walk is the owner duty set by California Streets and Highways Code section 5610, but the city runs its own sidewalk repair jobs street by street, so ring them first. Where the answer is yours, we replace whole panels and dowel into the neighbors.
Garages behind the pre-war houses in south Colton were poured thin and direct on sand, and decades of oil and traffic show as a floor that dusts under a broom. We break out, compact a real base, lay a 10 mil vapor barrier and pour back at 4 inches with steel through it.
This is the hot end of the towns we cover, with afternoons past 95 in July and August, so a dark slab in an open back yard is unusable half the day. Color mixed through in a pale tone, with a broom or salt texture, reads a few degrees cooler underfoot and will not fade in patches
East of the city the ground climbs out of the basin toward Reche Canyon, and the survey maps rock outcrop there rather than sand. A wall in that ground is footed into firm material and drained behind the stem, and anything over 4 feet from the bottom of the footing is permitted.
Shop slabs and the units going in behind older houses all start as a floor that has to stay flat. On sand that means compaction is the whole job: base in lifts, a barrier under the slab, steel on a grid, and a surface troweled level enough to take tile or a coating.
The town is laid out the way the railroad laid it out. The Southern Pacific pushed its last transcontinental leg through in 1875 and a grid of streets followed, and both the east-west and the north-south lines still cross inside the city. The 1891 Carnegie library on La Cadena Drive, now the Colton Area Museum, dates from the same decade, and the houses in south Colton were built by the families who worked the yards.
Concrete is older business here than it is anywhere near us. Settlers were burning limestone off Mount Slover in kilns by the 1860s, the Colton Marble Lime Company took the marble from 1881, and cement was being made from that mountain by 1894 at the first cement plant west of the Rockies. The hill is a fraction of the 1,184 feet it once stood, which is what a century of quarrying does.
Both counters stand on North La Cadena Drive. The Building and Safety Division at 659 North La Cadena takes the building permit, Monday to Thursday 7:30 to 5, on (951) 903-5460, with applications and status through the eTRAKiT portal. Engineering, in Public Works at 650 North La Cadena, issues the encroachment permit for the approach, the curb and the walk. Inspections are booked before 4pm for the next day.
Four stages, one crew and one written figure. Because this is the closest town on our map, a return visit costs an hour rather than a day, which is why an old lot is measured properly rather than allowed for.
Daniel Reyes measures the pour, opens a test hole in the sand and checks the approach and the walk at the street.
Old panels come up and leave the same day, and the subgrade is dug to firm material rather than leveled over.
Building and Safety takes the permit through eTRAKiT and Engineering takes the right-of-way work. We book the inspections.
Early starts in summer, joints cut inside 12 hours, walk at 24 hours, drive at 7 days, permit closed before the invoice.
Ring the number or use the form, and somebody comes out to measure. Every estimate is measured and written on site, so what you are handed comes off your own frontage instead of a photograph.
Reviews
Reviews from owners across every town this yard reaches. The Colton ones are downtown panels lifted and replaced, and garage floors rebuilt on sand behind old houses.
“They measured our driveway on a Tuesday and handed me the written estimate before they left. The crew was on site four days, poured 540 square feet at 5 inches in one morning, cut the joints that afternoon, and after its first summer over 100 degrees there is not a crack in it.”
“A tree root had lifted the same sidewalk slab three winters running. They cut the root back, set a root barrier, poured the new section 4 inches on compacted base and pulled the right-of-way permit themselves. Ten months on it is still flat.”
“Our patio was original to the house, 1980s and crumbling. Daniel walked the base prep with me before they started: they dug out the clay, packed gravel in layers, poured 300 square feet in ashlar slate and sealed it at 28 days. It looks like cut stone.”
Six answers written for a town with a railroad grid at its middle, river sand under it and two permit counters facing each other across the same street.
Because what is under them differs. On the old grid one house may have four decades of panels to lift and haul and no base at all beneath them, while the house beside it was redone in the 1990s and keeps its subgrade. Frontage width, the state of the approach at the gutter, and how far a truck can back in do the rest. Every estimate is measured and written on site.
Both, on most jobs. The building permit comes from Building and Safety at 659 North La Cadena, open Monday to Thursday, and anything in the public right-of-way needs an encroachment permit from Engineering in Public Works at 650 North La Cadena. A patio at grade in your own yard often needs neither, but the approach at the curb beside it will. We file whichever applies.
Sand, and a good deal of it. The soil survey maps the low ground toward the river as frequently flooded sandy deposits and the downtown ground as Tujunga loamy sand. It drains fast and compacts well when it is confined, so there is no winter heave to design against. The failure to design against is scour, which is why every slab we pour there has a thickened edge.
Rarely worth it. Concrete of that age here was laid thin, without steel and without a base, and 1,431 homes in this town date from before 1940. A patch bonds to a slab that is already moving, so the crack reappears at the new joint within a season or two. Where a single panel has failed on an otherwise sound run we replace that panel and dowel it in, and the rest of the driveway stays.
Any month, with the start time moved. Afternoons here pass 95 through July and August, the hot end of the towns this yard covers, so between June and September we begin at six in the morning and have the slab floated before the heat arrives. Through the wet months the mix is placed off a covered pad. Cure time does not change with the season: 24 hours to walk, 7 days to drive.
It is 9 miles up from Limonite Avenue and the closest town we cover in San Bernardino County, so yes. That matters more than it sounds: a job here can be measured on a morning and started later the same week, and a snag looked at without a whole day being set aside. Grand Terrace and Loma Linda are on the same run.
Of the 20 towns this yard reaches across four counties, Colton is the nearest in San Bernardino County, with Grand Terrace next. If your street forms a city limit, look the lot up first: the parcel decides which page applies, not the postal town.
Open the Jurupa Valley Office in Google Maps Say where you are and what needs pouring. Somebody rings within 1 business day, comes out with a tape and leaves a written figure, whether or not the job goes ahead.