Why water damage happens in Newman
Orestimba Creek comes out of the Coast Range, and when it overflows, much of Newman takes shallow water. Vegetation, silt and the bridges at Highway 33 and the railroad cut the creek's capacity. Overbank flow is held against the CCID canal, Highway 33 and the railroad embankments, and some is turned south through town to pond in the south-east before it tops the railroad. It usually arrives as sheetflow less than two feet deep, most often between October and April, and it damaged roads and homes in 1958, 1985, 1995 and 1998.
The March 1995 flood was the worst in Newman's 107-year history, and the water carried sediment. On 10 March the gauge upstream of the California Aqueduct peaked at 12,000 cubic feet per second, and buildings in town stood in more than two feet of sediment-laden water. Domestic wells and septic systems flooded, and many could not be used again. On 3 February 1998 the creek peaked at 9,470 cubic feet per second, the third largest peak on its record. Water carrying creek silt is Category 3, and porous material it reaches is treated as contaminated.
Most of Newman's storm water ends at one pump station, and in 2006 the pipe feeding it was the bottleneck. As the 2006 General Plan EIR described it, runoff ran through underground pipe and CCID ditches to the pump station at Inyo Avenue and Canal School Road, with five lift stations and an open channel along Sherman Parkway for the north-east. The main Inyo Avenue pipe was the constraint, and an upgrade to 60-inch pipe was planned. Untreated, the runoff drains to the Newman Wasteway and on to the San Joaquin River.
Newman's oldest houses stand on the original grid, and a 2024 inspection found many needing repair. One home in ten dates from 1939 or earlier, and a 1984 inventory counted more than 200 historic homes built before 1942. The mature neighbourhoods around downtown went up from the 1940s through the 1970s under mature trees. A city-wide inspection in February 2024 found about 500 units, around 15% of the stock, needing rehabilitation, from roofing to plumbing replacement. Worn roofs let rain in, and old supply lines pinhole inside walls.
Downtown Newman sits inside the FEMA 100-year flood zone, and rebuilding there follows flood rules. Most of downtown along Main Street and some residential areas west of Main are mapped in the zone, which the FEMA Flood Map Service Center shows by address. In a Special Flood Hazard Area, new, substantially improved or substantially damaged buildings need an Elevation Certificate filed with Public Works before final occupancy. Drying starts long before that, inside the EPA 24 to 48 hour mold window, ahead of the mold remediation that a missed window brings.
In March 1995 a convalescent hospital on Newman's north side had two feet of water inside and four in the parking lot, and 65 residents were flown out by Medi-Flight helicopter after ambulances and a school bus failed. In a Newman flood the roads can close first.
Water damage restoration, as delivered in Newman
The crew covers 26 miles from the Modesto base and comes in on State Route 33, the main road into and through Newman. The technicians who open the job close it, and the file stays one file from first reading to handover.
The approach is State Route 33, about 9,000 vehicles a day at Merced Street, inside a 120 to 140 minute window. In March 1995 flooding closed Highway 33 and other roads and limited emergency access, so during a creek flood the arrival time is set against closures when the request is acknowledged.
Category and class under IICRC S500 come first. In Newman the questions are whether Orestimba Creek sheetflow or backed-up storm water came in, both Category 3, or whether old plumbing in a pre-1940 house was the source. Moisture mapping and thermal imaging settle it.
Sediment and water are pulled out together with truck-mounted or portable extraction, and contaminated rooms are closed off and held under negative air.
Drywall, insulation, pad and flooring that cannot be saved are cut out, photographed and sent under manifest to Stanislaus County permitted facilities.
Drying equipment is sized to each building's volume and class, from a 1940s house in the mature grid to a Main Street storefront. The unreinforced brick buildings downtown are Class 4, because dense masonry gives up water slowly and needs more time under equipment.
Each day's readings are set against dry reference material in the building and entered in the log.
Drying ends once readings reach the S500 goal. The owner and adjuster receive the photographs, moisture maps, logs, manifests and a line-item scope in one package.
Where water damage happens in Newman
Newman's areas differ by where Orestimba Creek water and the storm pipes run, and by whether the streets are old grid or later cul-de-sac.
Downtown and Main Street
A grid of about six by six blocks with the commercial core, Newman's oldest residential blocks and the 1920 Carnegie Library, most of it in the 100-year flood zone. Unreinforced masonry holds water long after sheetflow recedes.
Central Residential District
Bounded by Yolo, T, Inyo and P Streets, this is the Housing Element's Area 1, among the four areas with the most homes needing rehabilitation, roofing and plumbing included. Worn roofs and old supply lines are the entry points.
Rehabilitation Areas 2 to 4
Further concentrations of homes needing repair, bounded by Inyo Street to Prince Road, Kern/Driskell Street to Eucalyptus Avenue, and Lucille Avenue to Main Street. Deferred roof and plumbing work lets a small leak become a larger loss.
Driskell Avenue apartments
Valley Manor Apartments at 719 Driskell Avenue, 48 project-based units where an inspection noted many balconies needing dry-rot repair, and the 67-unit Newman Family Apartments at 751. Water through failing balconies reaches the rooms below.
Highway 33 corridor and the Westside Shopping Center
In 2006, service commercial, gas stations and industrial lots lined the highway outside downtown, and the Westside Shopping Center was new at the south end. Westside Village Senior Apartments on Prince Street has 40 units for residents 55 and older.
Industrial zone east of Highway 33
Runs from Kern Street to the Merced County line; in 2006 it held mini-storage, the F&A Dairy tanks and a mix of modern and poorly maintained buildings. Older industrial roofs over large floors are the exposure.
Sherman Ranch and Lucas Ranch
North-east subdivisions, parts of them inside the San Luis and New Exchequer dam inundation zones in the 2006 mapping, drained by the open channel along Sherman Parkway. Tile drains under the former farmland here cannot be built over.
Creekbridge, Stephens Ranch and Creek Canyon
Subdivisions drained by CCID ditches rather than city pipe: the Clery Ditch serves Creekbridge in the south-west, and the Miller Ditch, near Shiells Road, takes Stephens Ranch and Creek Canyon. A full ditch can back water into yards.
Inyo Avenue and Canal School Road
Most of the urban area and the fields to the north drain to the pump station on this corner, and in 2006 the Inyo Avenue trunk pipe was the bottleneck. Properties north of Inyo sit upstream of that constraint.
Mattos Ranch
A south-east master plan of homes and retail, with Phases 1 and 2 recently annexed. The south-east of the city is where Orestimba Creek water turned by the railroad embankment ponds before it tops the tracks.
Northwest Newman Master Plan area and Orestimba Road
A 362-acre plan adopted in April 2017 just outside the city, 187 acres of it for homes and parts in a 100-year flood hazard zone. The fringe along Orestimba Road and Fig Lane keeps orchards, old barns and farmhouses.
River Road parks on the San Joaquin
Mobile home and RV parks east of town along the river, under evacuation orders in March 2011 and January 2023. After the 2023 flood the county said some people lost trailers or took severe water damage.
Water damage sub-services available in Newman
Questions from Newman property owners and managers
Creek water carrying sediment is Category 3 under IICRC S500. Silt and water are extracted together, and porous material the water soaked, such as drywall, insulation, carpet and pad, is removed and manifested rather than dried. Framing and hard surfaces are cleaned and then dried to the S500 goal. In March 1995 buildings in town took more than two feet of this water, so walls are opened above the high-water line to find where it wicked.
Water that flows in across the ground from outside is flood, and standard property policies usually exclude it unless a flood policy is in place. Rain through a roof opened in the same storm is usually treated separately. The photographs and moisture map record which way the water entered and how high it rose, which is the first thing the adjuster asks for.
If the damage makes the building substantially damaged, or the repair counts as a substantial improvement, yes: in a Special Flood Hazard Area the City requires an Elevation Certificate to be submitted to the Public Works Department at 938 Fresno Street before final occupancy. Drying does not wait for that. Reconstruction permits come from the City of Newman Building Department at City Hall, where plan-check permits usually take a 10-day review.
In the 2006 General Plan EIR mapping, the San Luis and New Exchequer dam inundation zones reached into the north-east of the city, over parts of Sherman Ranch and Lucas Ranch. That mapping describes a dam failure, and the sources read tie no repair rule to it. Water damage in those houses is dried and documented the same way as anywhere else; how a policy treats dam failure is a question for the insurer.
The City handles a re-roof as an over-the-counter permit with no plan check, invoiced once a complete application is received, and every issued permit expires 12 months from issue. Applying once the scope is agreed keeps those 12 months for the work itself. Meanwhile the interior is extracted and dried, so waiting on the permit does not leave the building wet.
In 2006 the Inyo Avenue trunk pipe, which collects from the system north of Inyo, was the main bottleneck on the way to the pump station at Canal School Road. If water backs onto a property there, photograph the high-water mark inside and out, the street and any drain it came from before anything is moved. The crew adds a moisture map and dated readings, which show the entry path an adjuster will ask about.
Water damage restoration near Newman
