Colton sits 8.9 miles from our Chicago Ave yard, on Santa Ana River ground that has been quarried and burned into cement at Slover Mountain since the 1890s. Every estimate is measured and written on site.
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Colton is a railroad town of about 54,828 people built on the Santa Ana River plain, and the ground under it is the river's own work: sand, gravel and silt laid down in flood after flood.
Alluvium of that kind drains well, which is why the town could be built on it quickly, but it has almost no cohesion. Where a trench was backfilled loose, a garage pad thrown over graded spoil, or a lot leveled by pushing material downhill, the fill keeps consolidating for decades and the slab above goes down with it. It is why so many Colton cracks run in a straight diagonal off one corner rather than in the map pattern a shrinking mix gives you.
The second reason is the calendar. Most of the housing here went up between 1945 and 1975, when four inches of unreinforced concrete on native dirt was the normal residential specification and joints were troweled rather than cut. Flatwork built that way does its job for forty or fifty years and then arrives at the end of it all at once, which is what a whole street of broken driveways in one Colton tract is. A patch over the original base buys three winters.
Colton's housing is mostly 1940s to 1970s, so most of what we pour in this city replaces flatwork that has already spent sixty years on river sand. These eight jobs are the ones the town asks for.
Driveways on Colton's post-war tracts went down four inches thick on native river sand with no steel in them, and six decades later the panels rock and step at the joints. We break the old slab out, compact a base to depth and saw the joints to the shape of the pour.
Back yards in Colton run to deep lots hemmed in by the 10 and the 215, and summer afternoons here average in the mid-90s. A poured patio takes that heat without the joint weeds a paver field gets, and we slope it to carry the first October rain away from the house.
Front approaches along La Cadena Drive and the older streets off Mount Vernon Avenue are the part of a Colton house a buyer reads first. Stamped concrete gives that approach a pattern and a color in one pour, with no sand joints to wash out and no units for the subgrade to tip.
Public walk in Colton is the owner's to maintain, and the pepper and ash trees along the residential grid have lifted panels into trip edges across South Colton. We saw out the raised sections, root-prune to the city's rule, repour to grade and close the encroachment permit.
Colton garages from the 1940s and 1950s were poured as thin aprons over unprepared fill, and the cracks mapping across them are that fill settling, not the surface failing. We take the floor out to the footing, lay vapor barrier and mesh over compacted base, and finish it flat.
The cement that built much of this county was burned a mile from downtown Colton, and exposed aggregate, integral color and salt finishes all let that material show rather than hide it. We place decorative work in the same pour as the slab, so the finish cannot peel off later.
Reche Canyon and the lots climbing the ground behind Slover Mountain are cut-and-fill benches, and the fill side is what slides after a wet winter. We build footed, reinforced walls with weep holes and gravel behind the stem, engineered once the retained height passes four feet.
The warehouse and shop buildings along the rail corridor between the 10 and the freight yards take forklift traffic all day on floors poured for lighter use. We install interior slabs to a measured thickness with doweled saw joints, so the edges stay supported and do not spall.
Colton is cut into pieces by track. The Colton Crossing, where the Union Pacific and BNSF main lines meet, was one of the busiest at-grade rail junctions in the country until it was separated onto a flyover in 2013, and the yards and spurs that fan out from it still decide which streets a mixer can reach and from which direction. We route deliveries and set pour times around that, because a truck holding on a blocked crossing in August heat is a load of concrete going off in the drum.
Cement has been made in this city since the 1890s, when quarrying began at Slover Mountain for what became the California Portland Cement plant, and the mountain has been going into buildings across Southern California ever since. It means the mix on your Colton job has one of the shortest hauls in the region, which is worth one thing: we batch for the temperature on the day and get the truck on site inside the window, rather than adding water at the chute to keep a load workable.
Building permits for slabs, walls and structural work come from Development Services at the City of Colton, and anything in the parkway, across the public walk or at the drive approach needs a separate encroachment permit from Public Works. We file both, meet the inspector and close the permit out. We work the whole city, from the older grid in South Colton to the canyon lots on the east side, and we measure on site because the ground under them is not the same.
Four stages, from the first call to the final walk. Timings below are what a residential job inside Colton actually takes, not a regional average.
Tell us the address, the job and roughly the size. We call back within 1 business day and book a Colton visit, usually inside that same week.
We measure the area, dig a test spot to see what base is under the old slab, and check where the water goes. The estimate is written first.
We file with Colton Development Services, and Public Works if the work touches the walk, then confirm a pour date against the plant.
Breakout and base prep run one to two days, the pour one, and we walk the finished job with you once it has cured and the inspector has signed.
Send the address and what you are trying to build. We will look at the drainage and the base as well as the slab, and put a number in writing before you commit to anything.
Reviews
These are from jobs across the 20 cities we cover, Colton among them. They are the site's own reviews rather than a Colton-only selection, because a page of five local reviews would be a smaller sample than an honest one.
“Our 1920s place in the Wood Streets had a driveway that was more crack than concrete. They took out 480 square feet, dug the old fill out to firm ground and poured 5 inches. Marco was there for the pour and the joints were cut the same afternoon.”
“The city tagged the sidewalk panel outside our house on Magnolia. Riverside Concrete Pro pulled the encroachment permit, met the inspector and poured the 5-foot section to the cross slope the city wanted. I never had to go to the counter myself.”
“We wanted a patio behind the house in Canyon Crest that would take the afternoon sun. They poured 380 square feet in a broom finish, cut the joints on a 10-foot grid and sealed it at 28 days. Two summers on it has not moved a millimeter.”
Six things people in Colton ask us before they book. If yours is not here, call and ask it, we answer these on the phone as readily as in writing.
Four things, in this order: how much old concrete has to come out and go to the tip, what the base under it turns out to be, whether the pour is reachable by chute or needs pumping, and the finish. In Colton the base is the one that surprises people, a 1950s slab often has nothing under it but loose river sand, and rebuilding that is real excavation. All four are only knowable at the property.
For a replacement driveway or patio on your own lot, usually not. For a slab foundation, a retaining wall over four feet, or anything structural, yes, that goes through Development Services at the City of Colton. Anything in the parkway, across the public sidewalk or at the drive approach onto a Colton street needs an encroachment permit from Public Works instead, a different counter and a different inspection.
Colton is 8.9 miles from our yard on Chicago Ave, straight up the 215, so it is inside our normal daily range rather than a trip we batch up. We call back within 1 business day and can usually be at the property to measure inside the week. Start dates depend on the permit counter and the plant schedule, and we tell you which of the two is setting your date rather than a placeholder.
The river-plain soil across most of Colton is not expansive clay, so it does not swell and shrink the way ground in the arroyos does. What it does is settle where it was disturbed and never properly compacted, and that is what breaks slabs here. The exception is the higher ground toward Reche Canyon, where clay content climbs. Check your own lot on the USDA Web Soil Survey.
Seven days for foot traffic, and we ask you to keep vehicles off for a full 28 days, the age at which a standard mix reaches its design strength. Colton summers help the early set and hurt the cure, so on hot weeks we pour early and keep the slab wet or covered rather than letting the surface flash off. Breakout to that first walk is three to four days of crew time on a residential driveway.
Colton is one of 20 cities we cover inside a 25-mile radius of Riverside. Its immediate neighbors on our list are Grand Terrace and Loma Linda to the south, Highland to the north-east and Redlands beyond it, and the whole of Riverside itself across the river. Riverside Concrete Pro holds the same base depths and the same written workmanship guarantee on every one of them.
Colton sits at the north edge of our 25-mile radius, and these are the towns around it we also build in. Every one gets crews from the same yard, the same base specification and the same written estimate.
Open the Riverside Office in Google Maps Call and describe the job, or send the address and we will come and measure it. You get a written estimate with the base depth and the joint layout on it, so you can compare it against anyone else's like for like.