On Site Excavating is the crew Rapid City calls when a water main breaks, a sewer line fails, or a new build needs utilities run right. Owner-operated by Ty, open around the clock, and rated a perfect 5.0.
Water and sewer are what we know cold. From an emergency main break to a full new install, here is how On Site puts you back on solid ground. Pick a service to see how we handle it.
Leaking or broken water main lines located, dug up, and replaced fast, so your water is back on right.
View service →02Collapsed, clogged, or broken sewer lines repaired or replaced, from the house to the city main.
View service →03New water and sewer service lines and mains installed for new builds, additions, and hookups.
View service →04Cistern lines, water service lines, and rural water hookups installed and repaired across the Black Hills.
View service →05Precise excavation and trenching for utilities, drainage, and site work, dug clean and backfilled right.
View service →06Water or sewer emergency at 2am or on a Sunday? On Site answers. We are open 24 hours, every day.
View service →A water or sewer line is only as good as how it goes in the ground. Dug to the right depth, bedded right, backfilled and compacted right, below the frost line, and put back so you would never know we were there. That is the difference between a repair that lasts and one you are calling somebody about again next spring.
On Site works clean and works right the first time. Our reviews say it over and over: everything was explained up front, the timeline was clear, the crew was professional, and the site was spotless when they left. That is not luck. That is doing underground work like precision matters, because down here it does.
Any hour, any day. Reach Ty directly at (605) 430-2626. For an emergency we move fast to stop the bleeding and keep your water working while we plan the fix.
We tell you exactly what is going on, what the fix takes, and what it costs, up front. No hidden costs, no surprises on the invoice. Just a straight number and a clear timeline.
We dig it, fix it, backfill and compact it, and put the site back so you would not know we were there. Then we make sure it is right before we roll out.

On Site Excavating is Ty, his son, and a crew that treats your property like their own. When you call, you get the owner, not a dispatcher three states away. That is why the work is consistent and the reviews read the way they do.
Homeowners on a Sunday emergency, builders on a tight deadline, folks out on cisterns and rural water. They all get the same thing: honest answers, fair prices, and clean work that holds.
These are real Google reviews from real On Site customers around Rapid City. Integrity, honesty, and clean work come up again and again.
“On Site Excavating is honestly one of the best companies I have worked with. They do things the right way and you can tell integrity actually matters to them. They are upfront, honest, and do not try to sneak anything past you.”
Kara Goodrich“Ty and his whole crew are top notch. I needed my front water main replaced, and from A to Z everything went exactly as it was explained to me when I contacted them. They had me up and running quick.”
Larry Paulsen“Ty and his son came on a Sunday to repair my leaking cistern. They did a great job and were very professional. Everything was cleaned up after they were done. You would not know they were ever here.”
Ben ShillingFrom the shop on Oakland Street, On Site covers Rapid City and the communities around it, from Rapid Valley and Box Elder to Summerset, Piedmont, and Black Hawk. If you are in the western Black Hills area, you are on our map.
Nobody thinks about their water main or sewer line until the day it fails. Then it is the only thing that matters. Water where it should not be, no water where it should be, or a sewer backing up into a house. Those are not tomorrow problems, and On Site is built around that reality.
Being open 24 hours is not a slogan here, it is the whole point. When a main lets go at midnight or a line collapses on a Sunday, the difference between a bad day and a disaster is how fast a real crew shows up and how well they work once they do. We answer, we come, we stop the damage, and we fix it right.
Underground utility work is unforgiving because you only get one shot before it is buried. A line set too shallow freezes. A trench backfilled carelessly settles and cracks the line inside it. A connection made in a hurry leaks for years. So we do it the slow-is-smooth way: located before we dig, set to proper depth, bedded and backfilled and compacted, and pressure-checked before we close it up. Precision on the part you cannot see is the entire job.
That is what the crosshair in our name stands for. On site, on the mark, every time, whether it is a 2am emergency or a planned install for a new build. It is why nineteen out of nineteen reviews landed on five stars, and why local contractors hand us the work they need done right.
Tell Ty what is going on. For emergencies, call or text and we will move. For everything else, send the details and you will get a straight answer and a fair number.
Emergency? Call or text (605) 430-2626 right now. We answer around the clock.
Yes. Water and sewer emergencies do not keep business hours, so neither do we. Call or text (605) 430-2626 any time, day or night, weekend or holiday, and you will reach us.
We are water and sewer utility specialists. Water main and sewer line repair and replacement, new water and sewer installation, cistern and rural water service, and the excavation and trenching that underground work takes, all across Rapid City and the Black Hills.
It depends on the line, the depth, and what we find when we open it up, but the price is always upfront and honest with no hidden costs. Our reviews say it best: no surprises, just straight up good work at a fair price. Call and we will walk you through it.