Excavation & Underground Utilities in Randolph, NJ
JWSR LLC is a local, licensed and insured excavation and utility contractor working in Randolph and across Morris County. Randolph sits about 21 miles south of our Hamburg yard, roughly 30 minutes out, so we can get a crew and the right machine there without a long wait.
JWSR LLC is a licensed and insured excavation and utility contractor based in Hamburg, New Jersey, about 21 miles from Randolph, working across Morris County. Essentially all of Randolph's land area sits inside a public water delivery area, shared between 2 systems, the largest being Randolph Twp Public Works Dept. About 57.7% of the town is inside a sewer service area, the largest run by Rockaway Valley Regional SA, and the rest is on septic. We do the underground work either situation calls for: water and sewer service lines, septic, storm drainage, excavation and restoration. Call 862-268-2510 for a free on-site estimate.
Around Randolph, we deal with a lot of ledge rock
Randolph sits in the New Jersey Highlands, where the bedrock is ancient, hard gneiss and granite that often sits close to the surface. Because that rock resists erosion, digging here regularly runs into ledge, and it takes the right equipment to get through it.
We bring in the bigger machines and the tools to break out and remove ledge rock so the job keeps moving, whether it is a foundation, a utility trench, or a septic field. Rocky ground is where experience really shows. That is a big part of what we do here, but it is far from the only thing. We still handle sewer and water lines, septic, grading, driveways, and emergency digs across town.
Helpful guides: Call 811 before you dig. Every job, every time · Understanding excavation costs
Sources: New Jersey's Highlands geology (gneiss & granite bedrock) · NJ Geological Survey bedrock map of Sussex County
Morris County runs from busy suburban neighborhoods to wooded hillsides, and the work follows suit, from tight utility repairs to regrading sloped lots that will not drain.
As a township, Randolph has the kind of larger properties where septic systems, grading, drainage, land clearing, and long driveways come up most. Whether it is an emergency sewer or water line dig-out, a septic system, a lot that will not drain, or a new driveway, we bring our own equipment and an operator who knows the ground in this part of Morris County. We show up when we say we will, and we leave your property graded and clean.
Services for properties in Randolph
Septic Installation in Randolph
New septic systems, replacements, and repairs, permitted and done right.
Learn more →Grading & Drainage in Randolph
Fix standing water, regrade your lot, and protect your property from erosion.
Learn more →Land Clearing in Randolph
Clear brush, trees, and stumps and get your lot ready to build.
Learn more →Driveways, Roads & Lots in Randolph
New driveways, road repairs, and parking lot redos built on a base that lasts.
Learn more →Excavation in Randolph
Site prep, dig-outs, trenching, and land development for any project.
Learn more →Sewer & Water Lines in Randolph
Emergency sewer and water line dig-outs, repairs, and full replacements.
Sewer & Water Lines in Randolph →Some of what we have been building
A look at recent excavation, utility, and site work from around Morris County and northern New Jersey.
What tends to be in the ground in Randolph
The biggest single stretch of building in Randolph came in the 1970s, though the township's 9,315 housing units are spread fairly wide across the decades.
Roughly 39% dates to the 1940s through early 1970s. That is the Orangeburg window, and pipe from it is past the age where it can be counted on.
Housing-age figures: US Census American Community Survey 2019–2023 5-year estimates, table B25034. Pipe service lives are documented industry figures. What is actually under any one property varies, so we confirm it on site before we quote a replacement.
Randolph is split between public water and private wells
About 99.5% of Randolph’s land area sits inside a public water purveyor’s delivery area, shared between 2 different systems. The largest is Randolph Twp Public Works Dept, then Dover WC. Outside those pockets most properties are on a well, sometimes their own and sometimes one shared with neighbors, and the three situations are different jobs with different rules. Which one you are in is the first thing to settle, and your bill settles it faster than any map.
What replacing a water service involves, and who supplies water in every town we cover.
Source: NJDEP Purveyor Service Areas of New Jersey, edition 2025-07-03, measured against US Census municipal boundaries. NJDEP maps actual delivery areas for public community systems, meaning fifteen or more year-round connections; smaller shared and association systems are real but do not appear. Percentages are share of land area, not share of homes, and a state file can lag a change of ownership. The name on your bill beats any map, including this one.
The part that changes the job here
Randolph is where a lot of Morris County's water actually comes out of the ground. The Morris County MUA's Alamatong wellfield sits in Randolph and Chester, and that is the source behind the bulk water sold to Wharton, Mount Arlington and others. Randolph then buys from that same authority for its own township system. The north side of the township is a different answer again, served by the Dover Water Commission. So the ground here supplies half the county and the township still is not on one system.
the township's own system across most of it, Dover's commission in the north, and water bought back from a county authority whose wells are here
Randolph is part sewered, part septic
About 57.7% of Randolph’s land area falls inside a mapped sewer service area. The largest share goes to Rockaway Valley Regional SA, with 4 smaller works alongside it. A service area is where sewer is planned and permitted, not a promise that a main runs past your house, so the only way to settle it for one address is to look. Outside it, septic.
Sewer connections, laterals and septic work are all things we do, and which one you need is usually settled in one phone call. Sewer and water line work.
Source: NJDEP Sewer Service Areas, read 2026-09-08, measured against US Census municipal boundaries. Percentages are share of land area, not share of homes. Most polygons in this layer are small on-site treatment works for a single school, campground or business, so read the percentages rather than the count.
If you find water surfacing in Randolph, call this first
Before you call us, get the water shut off. A leaking service line washes ground out from under whatever sits above it and keeps running until somebody turns the curb valve.
In Randolph that is Randolph Township, on 973-989-7000.
That is the police number, and it is not a mistake: the township itself says to call the police for an after-hours water main break or loss of pressure. The division runs 145 miles of water main under the engineering department, so in office hours ask the municipal building for water and sewer instead.
Once the water is off, the repair is ours. What replacing a water service involves, or what the first hour of a break looks like.
Read off Randolph Township's own published page and re-checked periodically. If your bill carries a different name, that name is the one with your curb key. Much of New Jersey is served by New Jersey American Water, 1-800-272-1325, 24 hours.
Working in Randolph
How fast can you get to Randolph?
Randolph is roughly 30 minutes from our Hamburg base, so we can usually be out for an estimate quickly, and for a sewer or water line emergency we start moving right away, day or night.
Do you install and repair septic systems in Randolph?
Yes. Septic installs, repairs, and failed-field excavation are some of the most common jobs we do in Morris County townships like Randolph. We handle the dig, the tank, and the grading, and we leave the yard clean.
Are you licensed and insured to work in Morris County?
Yes. JWSR LLC is a licensed and insured New Jersey contractor, and we work across Morris County and six other counties. We pull the permits, mark out, and do it by the book.
Need excavation in Randolph?
Free on-site estimates and 24/7 emergency service, about 30 minutes from our Hamburg yard. Call 862-268-2510.
Call 862-268-2510