Excavation & Underground Utilities in Mansfield, NJ
JWSR LLC is a local, licensed and insured excavation and utility contractor working in Mansfield and across Warren County. Mansfield sits about 29 miles southwest of our Hamburg yard, roughly 45 minutes out, so we can get a crew and the right machine there without a long wait.
Clearing and reclaiming land in Mansfield
Mansfield is farm and open country, and plenty of land here has sat overgrown and unused for years. Land clearing here means taking those lots back and turning them into something useful again, whether that is reclaiming a field for hay, opening ground for livestock to graze, or clearing a pad for a new building.
We clear, grub, grade, and haul so owners can put land that sat idle back to work. 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: Storm damage: document before you clean up · Preventing erosion after excavation
Warren County is farm country and river valley, with long rural driveways, big lots, and a lot of grading and drainage work. Properties out here usually need real earthmoving, not just a quick patch.
As a township, Mansfield 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 Warren County. We show up when we say we will, and we leave your property graded and clean.
Services for properties in Mansfield
Septic Installation in Mansfield
New septic systems, replacements, and repairs, permitted and done right.
Learn more →Grading & Drainage in Mansfield
Fix standing water, regrade your lot, and protect your property from erosion.
Learn more →Land Clearing in Mansfield
Clear brush, trees, and stumps and get your lot ready to build.
Learn more →Driveways, Roads & Lots in Mansfield
New driveways, road repairs, and parking lot redos built on a base that lasts.
Learn more →Excavation in Mansfield
Site prep, dig-outs, trenching, and land development for any project.
Learn more →Sewer & Water Lines in Mansfield
Emergency sewer and water line dig-outs, repairs, and full replacements.
Sewer & Water Lines in Mansfield →Some of what we have been building
A look at recent excavation, utility, and site work from around Warren County and northern New Jersey.
What tends to be in the ground in Mansfield
Most of Mansfield went up in the 1980s, across roughly 3,140 housing units.
Roughly 32% 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.
Most of Mansfield is on a private well
About 12.6% of Mansfield’s land area sits inside a public water purveyor’s delivery area, shared between 2 different systems. The largest is Hackettstown MUA, then NJ American Water - Washington/Oxford. 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.
Sewer in Mansfield is a pocket, not a network
About 6% of Mansfield’s land area falls inside a mapped sewer service area. The largest share goes to Hackettstown WPCF, with 2 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 2026-08-25, 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 Mansfield, 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 Mansfield that is Hackettstown MUA, on 908-246-9520.
HMUA's 24/7 emergency dispatch line, water and sewer both, and they will shut a curb valve at no charge if your house valve has failed. HMUA covers the eastern edge near Hackettstown; much of the township is wells, and the Route 57 corridor splits between systems, so read your bill first.
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 Hackettstown MUA'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 Mansfield
How fast can you get to Mansfield?
Mansfield is roughly 45 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 Mansfield?
Yes. Septic installs, repairs, and failed-field excavation are some of the most common jobs we do in Warren County townships like Mansfield. We handle the dig, the tank, and the grading, and we leave the yard clean.
Are you licensed and insured to work in Warren County?
Yes. JWSR LLC is a licensed and insured New Jersey contractor, and we work across Warren County and six other counties. We pull the permits, mark out, and do it by the book.
Need excavation in Mansfield?
Free on-site estimates and 24/7 emergency service, about 45 minutes from our Hamburg yard. Call 862-268-2510.
Call 862-268-2510