July 17, 2026 Update:
Rock Creek Parkway Improvements:
Thank you for your patience and feedback this week as crews work through the final and most complex phase of the Rock Creek Parkway project. Your input this week is already shaping improvements to detours and traffic management.
Please see below for progress made this week, what to expect next week and for a few weekend reminders as we continue working together to build a safer, smoother corridor for everyone who drives, walks, and bikes it, ahead of the 2026-2027 school year.
This weekend, please keep in mind:
• Saddlebrooke is a private community and is not a through route. Access is managed for Reliance Circle and Saddlebrooke residents only and may change based on conditions. Please do not cut through Saddlebrooke, and please respect the new “Local Traffic Only” signs going up around 88th Street.
• Rock Creek Parkway through traffic should use South Indiana Street and Coalton Road. Additional detour signs went up this week and may be updated as conditions change, so please follow posted signs.
• 88th St. traffic should use Coalton Road, McCaslin, Rock Creek Parkway, and South Indiana Street. Additional detour signs went up on Friday, 7/17 and may be updated as conditions change, please follow posted signs.
• Crews are working extended weekend and evening hours to finish as quickly as possible. Thank you for your patience with the added activity near the work zone.
• The closure runs through Aug. 11. August 12 is a firm reopening date, and crews are working to finish sooner.
Progress this week
• Full closure of Rock Creek Parkway and South 88th Street took effect July 15, opening the combined work zone
• Detour signage and message boards were expanded across the corridor based on early traffic patterns
• Underground utility and asphalt removal work was advanced at the 88th Street intersection
• Underground utility and drainage work and concrete work was advanced on the new roundabout at Coal Creek Drive intersection
• Utility and roadway work was advanced on the South Indiana Street intersection.
What to expect next week
• S. 88th Street roundabout – Concrete curb and gutter and sidewalk repairs will go on throughout the week. Road stabilization of the subgrade will take place on Monday, 7/20.
• Coal Creek Drive roundabout – New concrete curb and gutter and sidewalk will be placed as well as concrete splitter islands for the new roundabout. Road stabilization of the subgrade at this intersection will take place on Friday, 7/24.
• S. Indiana Street – Bottom lift of pavement in the S. Indiana Street intersection to the Coal Creek Drive roundabout is scheduled to be placed Wednesday, 7/22.
• Crews continue extended and weekend hours, weather permitting – work is planned the S. 88th St. roundabout and the Coal Creek Drive roundabout on Saturday 7/18 from 8AM – 7PM (at the latest).
For Reliance Circle residents
Crews are reaching out directly to talk through local-only access and find the best ways to keep the households most affected by the closure informed.
Questions?
Contact the Public Works and Utilities team at (720)738-7693 or at pwu@info.superiorcolorado.gov . The Town Projects website will be updated regularly through the closure.
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July 15, 2026 Update:
Starting July 15, Rock Creek Parkway will close between South Indiana Street and Enterprise Street; this includes the closure of South 88th Street up to Shamrock Drive. The closure allows crews to complete corridor improvements before Boulder Valley School District students return to school on Aug. 12.
Emergency services will continue to have access through the construction zone. If evacuation orders are issued, residents will be able to use emergency access points on Lanterns Lane at Promenade Drive, East Weldona Way at 88th Street, and through the construction zone as needed.
Closure details
- Rock Creek Parkway is closed between South Indiana Street and Enterprise Street in both directions.
- 88th Street is closed between Shamrock Drive and Rock Creek Parkway in both directions.
Map outlining closures on Rock Creek Parkway and 88th Street. Click on the image to enlarge.
Alternative routes
Driving?
- Rock Creek Parkway Closure: Use Coalton Road, McCaslin Boulevard, or South Indiana Street.
- 88th Street Closure: Use Coalton Road, McCaslin Boulevard, or West Dillon Road.
Walking or biking?
- Cross Rock Creek Parkway at South Indiana Street or Enterprise Street.
- Cross 88th Street at Shamrock Drive.
- There will be no pedestrian or bike access on sidewalks in the construction zone.
Riding the bus?
- RTD Route 228 detours on South Indiana Street and Coalton Road. Stops at South Indiana Street, South 88th Street, and Tyler Drive are closed in both directions.
Find more specific closure and detour details on the Town's Streets: Ownership, Snow Removal, and Construction Road Closures map. Select "Rock Creek Parkway Construction: Full Road Closure Starting 7/15” on the left menu bar.
For residents on Reliance Circle, a letter will be provided by July 15 outlining more specific detour options.
Additional Information
- Single-lane closures have been prioritized throughout construction to limit disruption. Combining the remaining phases into one closure is the fastest path to reopening before school starts.
- Message boards were updated last week to alert residents of the upcoming closures. Message boards will be updated to show the following along the Rock Creek Parkway corridor:
Rock Creek Parkway Full Closure
Indiana to Enterprise 7/15-8/11
No Access to 88th St
- An additional message board on 88th Street near Promenade Drive will show:
88th Street Full Closure
Shamrock to RCP 7/15-8/11
We appreciate your patience and cooperation as we complete these roadway improvements and work to reopen the road as quickly as possible. For questions, please contact Christine Katz at christinek@superiorcolorado.gov.