If you live in Cypress Glen and you've been cutting through downtown Chapin all summer without noticing much different, that's about to change. The bypass project that's been talked about since 2012 stopped being a meeting item in February and started being actual dirt work by early summer. For a neighborhood built off Old Lexington Highway and zoned into the Chapin school cluster, including Chapin Middle and Chapin High, that matters more than it might for other parts of town, because the roads getting rebuilt are the same ones most Cypress Glen families already use to get their kids to school.
Here's what's actually happening, where, and what it means for the next several months of your drive.
Two new roads, one roundabout
The project everyone's been calling "the Chapin Bypass" is really two new roads plus a widening of Columbia Avenue, all designed to pull through-traffic off the two-lane road that currently handles most of the town's daily flow. According to plans presented at a February 19 public forum at Mt. Horeb Lutheran Church, the layout breaks down like this:
- One new road starts off Amicks Ferry Road, cuts through Lexington Avenue and Chapin Road, and ends in a new roundabout near Abner Montessori School, where it meets East Boundary Street and Stonewall Court.
- A second new road starts off Columbia Avenue, runs between the athletic fields behind Chapin High School and the Upcycle Facility, and ends at that same roundabout.
- Columbia Avenue itself gets widened to four lanes with a center median, stretching from Chapin High School out toward the interstate.
If your family's route into town touches Chapin Road, Amicks Ferry Road, or Columbia Avenue at any point, you're driving through the construction zone, not around it. Chapin High School sits directly on Columbia Avenue, so getting a student there this fall means crossing the exact stretch that's about to see four-lane widening.
Why a two-lane road became a $90 million problem
The numbers explain why this has been such a persistent headache. Columbia Avenue carries about 13,200 vehicles a day, compared to just 1,200 on nearby East Boundary Street, based on 2024 SCDOT traffic counts. That's a lopsided load on one road running through a town whose population sits around 1,800 people. The project is being funded with $90 million routed through the Central Midlands Council of Governments, the regional body that channels federal and state dollars into long-range road work. Chapin Mayor Bill Mitchell called the February announcement "a day to really be excited and celebrate," adding that the project had been "12 years in the making."
Where the timeline actually stands right now
Here's the sequence SCDOT laid out, and where September 2026 falls within it:
| Milestone | Timing |
|---|---|
| Public design forum | February 19, 2026, at Mt. Horeb Lutheran Church |
| Utility relocation prep, including tree clearing | Began April 2026 |
| Construction affecting local traffic | Started around June or July 2026 |
| New bypass roads open | Scheduled to open before Columbia Avenue widening begins |
| Columbia Avenue widening | Follows the new road openings, with one lane in each direction kept open throughout |
SCDOT's public involvement director, Ginny Jones, said crews would avoid working during rush hour and keep at least one lane open in each direction on Columbia Avenue during the widening phase. That's a meaningful detail if you're timing a school drop-off or a grocery run around the corridor this fall. The two new roads are meant to open first, which should eventually pull some volume off Columbia Avenue before the heavier widening work begins there. As of this writing, no public completion date has been announced, so the honest answer for how long this drags on is that nobody outside SCDOT knows yet.
"It has been a slow train coming," Mayor Mitchell said at the forum, adding that Chapin's roads "cannot bear" the traffic they're carrying now.
What this means for the school run
For a Cypress Glen household, the practical question isn't whether the project is a good idea. It's whether your Tuesday morning drop-off at Chapin Middle or Chapin High is about to take fifteen extra minutes. Given that Chapin High School fronts directly on Columbia Avenue and one of the two new bypass roads runs immediately behind its athletic fields, expect visible construction activity near school property this fall, not just downtown.
The plan does include a few features aimed at easing that friction. Bike lanes and sidewalks are part of both new roads and the widened section of Columbia Avenue, a detail residents pushed for at the forum according to Mayor Mitchell. There's also a plan for residents to park at Our Lady of the Lake Catholic Church on Amicks Ferry Road and walk or bike the rest of the way once the new roads are functional, which could be a useful workaround on days when through-traffic backs up near the school zone.
The bigger picture, and why it's not the only growth story in town
The bypass isn't happening in isolation. Just off Columbia Avenue, developer Mungo Homes has proposed a residential and commercial project called Brighton, originally sized at nearly 500 homes on 161 acres and later scaled back to 382 single-family homes after months of Planning Commission debate. That project remains stalled, with talks pushed to an undetermined later date as of November 2025, and if it moves forward at all, groundbreaking on the first phase isn't expected before early 2028. The bypass and the Brighton debate are separate processes, but they're both symptoms of the same pressure: a town of 1,800 people trying to handle traffic and growth that its original two-lane roads were never built for.
For Cypress Glen residents, the practical takeaway is narrower and more immediate. This fall's disruption on Columbia Avenue, Chapin Road, and Amicks Ferry Road is the visible, dated part of that pressure. The Brighton development, if it happens, is a 2028-and-later problem. The bypass is a right-now one.
A neighborhood built for this kind of patience
Cypress Glen was designed as a family neighborhood from the start, with a pool, tennis courts, a playground, a walking trail, and a clubhouse inside the community, plus easy proximity to Lake Murray and the schools that anchor daily life here. None of that changes because of a road project. What changes, temporarily, is how you get from your driveway to the rest of town. Knowing which roads are under active construction, and which ones stay clear a little longer, is the difference between a smooth September and a frustrating one.
If you're weighing what a project like this means for your daily routine, or you're just trying to time your commute around the construction windows, it helps to have someone who's been tracking Chapin's growth for a long time. Phillip Jenkins has spent more than three decades watching Northwest Columbia's roads, schools, and neighborhoods change, and he's happy to talk through what's actually happening on the ground, no pressure attached. If a bigger move is somewhere on your horizon, request your free home valuation whenever you're ready to have that conversation.
