MoPac Intersections Slaughter Lane & La Crosse Avenue (Updated 4/20/18)

Emailed Announcement (Sent 4/20/18)

As work on the MoPac Intersections project continues, lane closures will be shared on TxDOT’s Austin District Twitter page. Follow @TxDOTAustin and #MoPacIntersections for up-to-date lane closure details.

Project updates will continue to be shared via email, as needed.

Southbound MoPac Detour
Crews will continue work on underground utility lines between La Crosse Avenue and South Bay Lane. As a reminder, motorists will be detoured to La Crosse Avenue headed westbound to Escarpment Boulevard, where they can either travel north to Slaughter Lane or south to SH 45.

The detour is anticipated to be in place Friday, April 20 from 10 p.m. – 8 a.m. and Sunday, April 22, from 8 p.m. – 6 a.m., weather permitting.

Additional Lane Closure Information
Nightly alternating lane closures will continue on north and southbound MoPac from South Bay Lane to Davis Lane:

Sunday, April 22 through Thursday, April 26, from 8 p.m. – 6 a.m.

Friday, April 27, from 10 p.m. – 8 a.m.

Nightly alternating lane closures will continue on east and westbound Slaughter Lane at the MoPac intersection:

Sunday, April 22 through Thursday, April 26, from 9 p.m. – 5:30 a.m.

Friday, April 27, from 10:30 p.m. – 8 a.m.

Road signs are being placed to alert drivers of the closures, and motorists should allow extra time to travel through the area. TxDOT asks the public to be patient and remain aware when traveling through the work zone.

Please note that schedules are subject to change due to weather or field conditions.

Email Announcement (Sent 4/13/18)

This week, crews will be performing work on underground utility lines between La Crosse Avenue and South Bay Lane. For the safety of the workers and the traveling public, there will be a nightly detour in place for those traveling on southbound MoPac who wish to continue past La Crosse Avenue.

Motorists will be directed to exit La Crosse Avenue and head westbound to Escarpment Boulevard, where they can either travel north to Slaughter Lane or south to SH 45. The detour is anticipated to be in place Monday, April 16 through Thursday, April 19, from 8 p.m. – 6 a.m., and Friday, April 20, from
10 p.m. – 8 a.m.

Additional Lane Closure Information
Nightly alternating lane closures will continue on north and southbound MoPac from South Bay Lane to Davis Lane:

Sunday, April 15 through Thursday, April 19, from 8 p.m. – 6 a.m.
Friday, April 20, from 10 p.m. – 8 a.m.

Nightly alternating lane closures will continue on east and westbound Slaughter Lane at the MoPac intersection:

Sunday, April 15 through Thursday, April 19, from 9 p.m. – 5:30 a.m.
Friday, April 20, from 10:30 p.m. – 8 a.m.

Road signs are being placed to alert drivers of the closures, and motorists should allow extra time to travel through the area. TxDOT asks the traveling public to be patient and remain aware when driving through the work zone. Please note that schedules are subject to change due to weather or field conditions.


Email Announcement (Sent 4/5/18)

You may have noticed the smell of petroleum oil near the intersection of MoPac and Slaughter Lane. Our crews have too. An investigation into the smell has determined that it is a result of a historical spill of crude oil that reportedly occurred along an old oil pipeline in the area in 1987.

According to documentation from the Texas Railroad Commission, remediation of the spill took place between 2002 and 2009 during a pipeline replacement project. In 2009, the Texas Railroad Commission deemed that no further remediation action was necessary.

Crews have tested the air quality and determined that there is no danger to workers or the public. We take environmental issues and concerns very seriously and will do everything we can to manage the situation appropriately. TxDOT is working closely with the Texas Railroad Commission and the pipeline owner to determine if additional remediation is needed.

In the meantime, the contractor will continue to excavate and haul the material to an appropriate temporary storage facility for further testing and proper disposal.


Future Landscaping

Once construction is complete on the MoPac Intersections project, TxDOT will utilize the Green Ribbon Program to plant native species within the right of way along the project limits. We are excited about the program and have some initial concept ideas ready to share.

Learn more about the Green Ribbon Program and other Green Ribbon Program plantings in the Austin District.


Recent Activities

Crews continue performing excavation activities and have begun constructing temporary pavement for detours, in preparation of extending MoPac’s mainlanes. Work to install bridge foundation features and remove the medians at Slaughter Lane has also begun.

Crews are expected to remove the Circle C Ranch sign this week, as well as a small section of the stone wall on the north and southwest side of MoPac. We are coordinating these activities with the Circle C Ranch Homeowner’s Association. The HOA will store these materials for their future use.

Night work is necessary to minimize impacts to traffic flow and congestion. As we move forward with construction and additional pavement is placed, night work may become less frequent, as crews will be able to utilize new pavement for daytime work activities. Until then, we will monitor the type of work being performed or equipment being used to identify opportunities to minimize noise impacts.

We understand construction can be tough on everyone and appreciate your patience as we move forward with this large construction project.


Upcoming Activities

In the coming weeks, crews will widen the pavement on north and southbound MoPac south of La Crosse, continue with excavation activities, and begin work on sound walls on the northwest side of MoPac.

Crews are anticipated to begin work on the Slaughter Lane underpass by mid-summer and expect it to be open to traffic in late spring. Once work begins, lane modifications will occur. We will share additional details as we get closer.


General Construction Information

General work hours take place Sunday through Friday. Work will occur both during the day and at night, depending on the activity, during the times shown below, unless otherwise noted.

Daytime Work Hours: 7 a.m. to 6 p.m.
Nighttime Work Hours: 7 p.m. to 6 a.m.

Please use caution when traveling through the work zone! Please note that schedules are subject to change due to weather of field conditions.

Additional Reminders

  • Speed limit on MoPac was reduced to 55 mph in the project work zone
  • Police officers will continue to be present during nighttime lane closures, as needed
  • Texas Gas continues work on a project independent of the MoPac Intersections project; we will continue coordinating with them regarding work and lane closure activities

Mopac Construction Phases

There are 3 phases of the MoPac/Slaughter & MoPac/La Crosse project.  As a timeline becomes available, it will be updated.  The 3 phases are:

PHASE 1

  • Clear right of way and construct temporary pavement for traffic detours
  • Begin construction of new mainlanes and ramps
  • Widen Slaughter Lane intersection and construct bridge
  • Build detention ponds and drainage system

PHASE 2

  • Continue construction of new mainlanes and ramps
  • Construct La Crosse Avenue bridge
  • Complete Slaughter Lane DDI and open to traffic

PHASE 3

  • Complete ramp construction and drainage components
  • Complete La Crosse Avenue intersection and open to traffic
  • Perform final paving operations for entire project

Planned improvements include:

  • Constructing two mainlanes in each direction on MoPac underneath Slaughter Lane and La Crosse Avenue.  Click here for the
  • Constructing a Diverging Diamond Intersection at MoPac and Slaughter Lane (check out an example animation here)
  • Improving the intersection at MoPac and La Crosse Avenue
  • Improving/adding pedestrian and bicycle accommodations – including building a shared-use path on the west side of MoPac from Slaughter Lane to La Crosse Avenue
  • To learn more about the intersections click here

Updates will continue to be shared via email. For additional information, visit www.txdot.gov and search for “MoPac Intersections” to visit the project page. To sign-up please send an email to MoPacIntersections@txdot.gov with “updates” in the subject line.

MoPac Intersections Project Team
(512) 693-7425
MoPacIntersections@txdot.gov
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