1. RESEARCH PROGRAMS Culvert Liners High Value Research Sue Sillick Montana Department of Transportation July 2011

2. RESEARCH PROGRAMS Purpose of Project Install two types of culvert liners to restore function and structural integrity to corrugated steel pipe (CSP) Cure-in-Place (CIPP) High Density Polyethylene (HDPE)

3. RESEARCH PROGRAMS Purpose of Project Why culvert liners vs. replacing the culverts? Improve worker and public safety during construction Minimize construction impact on the public and the environment Eliminate construction traffic delays and congestion Eliminate construction landfill waste Increase culvert performance and life Decrease maintenance costs

4. RESEARCH PROGRAMS Culvert Outlet Culvert Condition Prior to Construction Culvert Inlet

5. RESEARCH PROGRAMS Resin impregnated, three-layer polyester Cure-in-Place Pipe (CIPP) liner being inserted into existing culvert using compressed air Cure-in-Place Culvert Liner Installation

6. RESEARCH PROGRAMS CIPP liner under cure using low-pressure steam Cure-in-Place Culvert Liner Installation

7. RESEARCH PROGRAMS Completed CIPP liner inlet Cure-in-Place Culvert Liner Installation Completed CIPP liner outlet

8. RESEARCH PROGRAMS Example of work zone during the CIPP installation Cure-in-Place Culvert Liner Installation

9. RESEARCH PROGRAMS Seam welding the HDPE pipe for insertion into the existing culvert HDPE Culvert Liner Installation

10. RESEARCH PROGRAMS Inserting the finished HDPE pipe into the culvert HDPE Culvert Liner Installation

11. RESEARCH PROGRAMS HDPE pipe fully inserted and ready for grouting phase HDPE Culvert Liner Installation

12. RESEARCH PROGRAMS Completed HDPE liner outlet with grouted bulkhead HDPE Culvert Liner Installation

13. RESEARCH PROGRAMS Example of work zone in HDPE pipe installation HDPE Culvert Liner Installation

14. RESEARCH PROGRAMS Condition at Three Years HDPE CIPP

15. RESEARCH PROGRAMS Culvert Liner Evaluation Semi-Annual evaluations are being conducted for an initial 5-year period, including: Internal culvert deflection Lining integrity Leakage Flow Discoloration Other visual distress

16. RESEARCH PROGRAMS Questions? Contact Sue Sillick ssillick@mt.gov 406-444-7693 Project website: http://www.mdt.mt.gov/research/projects/macpa ss_culvert.shtml