Why asphalt paving is needed in Riverbank
Riverbank's newest retail arrived as one very large parking field. The 380-acre Crossroads West plan, approved in 2019 on flat former dairy and row-crop land that drains north-east to south-west, allows up to 550,000 square feet of commercial space, and a 152,000 square foot Costco was built at Claribel and Oakdale roads. Caltrans' preservation guidance is written for exactly this moment: treat a pavement while it is still in good condition, because leaving it ends in reconstruction.
An industrial estate that size wears out at its truck routes. The former ammunition plant is now the Riverbank Industrial Complex, 172 to 175 acres at the south-east edge of the city with 114 structures, about 700,000 square feet of industrial buildings and 39 active businesses. Where a yard has failed under load, Caltrans' standard specifications call for a two-inch saw cut to a true line, full-depth removal and a tack coat before new hot mix goes in.
A quarter of the city is older than 1980, and most of that quarter is in one place. The heaviest concentration of pre-1980 homes is Downtown Riverbank, north of Patterson Road and east of the BNSF, and a City survey of 4,954 units in 2003 rated 1,191 as needing moderate repair. Pavement of that generation behaves as Caltrans' seal guidance describes: hardened binder, raveling and aggregate loss under traffic.
The City has a written list of the places its storm water does not clear. Its 2008 master plan carries potential flooding locations including Patterson Road between Roselle Avenue and First Street on an undersized 12-inch line, Claus Road at Santa Fe Street with drywell drainage only, and Claribel Road between Terminal and Claus with no drainage system at all. Storm water is otherwise held in basins and pumped out within 24 to 48 hours, which is a long time for water to sit against a lot.
Changing a center's layout puts its stall count back in question. Patterson Road runs commercial centers from the western city limit to Atchison Street, and downtown carries more than 25,000 daily trips on Atchison, State Route 108. When a lot there is set out again for a new tenant, the ADA.gov restriping brief brings the accessible spaces into the job, counted separately for each parking facility on the site.
Riverbank's design standards size storm pipes for the 10-year storm and its basins for the 100-year, 24-hour storm, and every basin must be empty within 48 hours. A lot beside a basin working to that limit has wet ground under it for two days after a storm.
Asphalt paving, as delivered in Riverbank
Riverbank is 9 road miles from the Modesto base, and State Route 108 runs through the city as Atchison Street. The lot plan marked on the first visit carries every later measurement and photograph.
The request arrives with the service and the city filled in, and a site visit is arranged with the paving contractor assigned to it. The lot is walked with the owner, manager or board, noting gates, truck routes and the hours the premises trade. Site visit scheduled at a time that suits you. Start date set in the written estimate.
Each distress goes on the plan by type: alligator, longitudinal, transverse and block cracking, potholes, raveling and oil spots, with the spots that hold water and the inlets and basins they drain to. Accessible stalls and aisles are measured against Chapter 11B and the surface is rated on site.
The survey settles one treatment: crack treatment and seal, repair and seal, grind and overlay, or reconstruction. Permits go through the City of Riverbank Building Division at 6617 Third Street, and online for the industrial complex site.
Line items by area and length, repair kept separate from surface work, with the basis of the figure written into the estimate.
Crossroads West trades daily and the industrial complex runs to shift patterns, so the lot is phased around both, with entrances and accessible stalls kept usable and put back first. Irrigation is off five business days before a seal, and nothing is placed with rain forecast in the curing period.
Removals are saw cut two inches to a true line, tack coated and filled with hot mix; cracks treated and cured, oil spots primed, drain inlets covered.
Handover is the marked plan, the stall and aisle measurements against Chapter 11B, before and after photographs of each area, the product data sheets and the warranty terms.
Where asphalt paving is needed in Riverbank
Riverbank runs from a pre-war downtown grid to 2000s subdivisions, a 380-acre retail plan and a former ammunition plant.
Downtown Core and Santa Fe Street
Historic main-street buildings between Second and Fourth Streets, built to the sidewalk, with City Hall and the Plaza Del Rio at Third and Santa Fe. Parking here is rear lots and alley approaches, worked hard by deliveries and drained by the oldest pipes in the city.
Pre-war neighbourhoods around downtown
Gridded blocks east, south and west of downtown, bisected by alleys, holding the highest concentration of homes built before 1980. Alley surfaces here were never built as parking, and they break at their edges where vehicles turn in and out of yards.
Cannery District
About 28 acres west of the BNSF, bounded by Patterson Road, the railroad and State Route 108, where the old Sun Garden Gangi canning buildings are now occupied by a cannabis company. Industrial yards of that age carry modern truck loads on old, thin sections.
Callander Avenue, Parsley and Sierra Streets
The more industrial streets west of the railroad, with commercial buildings lining Callander Avenue and a mix of single and multifamily housing to the south. Loading areas here are small and hard to close, so repairs are usually staged half a lot at a time.
Patterson Road corridor
A main east-west street with commercial centers from the western city limit to Atchison Street and Callander Avenue. Two of the City's listed flooding points sit on it, so lots along this stretch are surveyed for standing water as carefully as for cracking.
Virginia Avenue, Terminal Avenue and Castleberg Park
Older homes built before curbs and gutters, where the improved street was set higher than the finished floors. Where a driveway or yard sits below the kerb line, resurfacing has to hold the existing levels rather than add depth.
Candlewood, Woodhaven Place and Estelle Avenue
A neighbourhood draining by free outfall to the Stanislaus River, where the City has seen the system fail at its west end and a 15-inch outfall carries far less than the 36-inch pipe above it. Surfaces here stay wet longer than the street they adjoin.
River Cove
A post-war neighbourhood north-west of downtown, across the river from Jacob Myers Park, with a levee and river bank along River Cove Drive. Paved access on and behind a levee is inspected for base loss after any period of high water.
Jacob Myers Park and the river frontage
The City's largest park, with a mile-long paved trail, the McRitchie Trail dog park and a group campground. In April 2018 high releases left the banks all but gone in places, and trail and lot surfaces near a bank like that are checked for undermining.
Crossroads
A 687-acre specific plan approved in 2001 south-west of the MID Main Canal, north of Claribel Road and east of Oakdale Road, planned for about 2,294 homes and mostly built out. Common-area lots from the mid-2000s are now due their first real treatment.
Crossroads West and the Costco center
A 380-acre plan approved in 2019 allowing up to 550,000 square feet of commercial space, with a 152,000 square foot Costco at Claribel and Oakdale roads and MID Lateral No. 6 crossing the southern third. Fuel lanes and cart bays take the hardest turning here.
Bruinville and the east side
Growth east of Claus Road around Riverbank High School, with the Diamond Bar, River Run and Countryside subdivisions. The east side sits in and below the Oakdale Irrigation District area, where drains were found too small for upstream runoff.
Riverbank Industrial Complex
172 to 175 acres at the south-east edge of the city, with an 80-acre industrial park at its heart, 114 structures and about 700,000 square feet of buildings housing 39 businesses. Its yards carry manufacturing and recycling traffic over sections laid decades ago.
Salida, Escalon and Oakdale
Towns 7 to 10 road miles from Riverbank. Each has an asphalt paving page of its own, written from that town's own corridors, lots and permit authority.
Asphalt paving sub-services available in Riverbank
Questions from Riverbank property owners and managers
The City of Riverbank Building Division at 6617 Third Street, which handles plan check, permits, inspections and complaint response for commercial and residential work inside the city. Projects on the former Riverbank Army Ammunition Plant, the redevelopment authority site, are submitted online through the City's building permit portal instead of at the counter. The contractor the request is handed to pulls the permit where one is needed, and the route is settled before the estimate is written.
Possibly neither, and the survey says which. The City's 2008 master plan lists Patterson Road between Roselle Avenue and First Street as a potential flooding location served by an undersized 12-inch line, and Patterson west of Terminal Avenue on an undersized pipe to the Seventh Street outfall. Where water arrives because the public line is full, a new surface will break up in the same place. Where it stands in a low spot on the lot, grading or an overlay can take it out.
In the April to October window. Rain here runs 2.57 inches in January, 2.22 in February and 2.21 in December at the normals station used for Riverbank, and almost nothing from June to September, and the City's own record notes a range from 5.7 to 27.4 inches in a year since 1906. Seals and overlays need a dry surface and a dry curing period, so the work is booked in the dry half and the wet half is kept for temporary repairs.
Because the joint was always the weakest part of the mat. Longitudinal cracks open at paving joints and seams, where the material went down at lower density and higher air voids than the lane beside it, and once a joint opens it takes water into the base. On a yard carrying loaded trucks at the complex, that is usually treated by cutting the failed strip out full depth, tack coating the face and replacing it, rather than by sealing across the top.
They affect the sequencing. The MID Main Canal bisects the city, MID Lateral No. 6 crosses the southern part of Crossroads West, and the east side carries Oakdale Irrigation District facilities including the Crane Drain, Riverbank Drain and Snedigar Pipeline. Caltrans requires irrigation to be off at least five business days before a parking area seal, so any landscape system is arranged in advance, and anything touching a district facility is agreed with that district first.
California counts them per parking facility: one up to 25 spaces, two up to 50, three up to 75, four up to 100, five up to 150 and six up to 200, and where a site has more than one facility each is counted on its own. One in every six accessible spaces, or fraction of six, is a van space, and there is always at least one. A car stall is 108 inches wide, a van stall 144, both 216 inches long, with a 60-inch access aisle.
Asphalt paving near Riverbank
