28 CONTENTS July 2023 / Vol. 78 No. 7 FEATURES 13 Utility & Communications Construction Update As the construction season jumped into full swing, the impacts of labor, equipment and government regulation on the contractor are highly impactful. 15 Achieving More Accurate Utility Infrastructure Mapping with The Help of an App More than 217,000 utility damage events were reported in 2021, according to the latest Common Ground Alliance DIRT Report. 19 HDDA Mud School Brings Provides Vital Information Drilling fl uid has been called the life blood of horizontal directional drilling. REHAB TECHNOLOGY 21 Breakthrough Time of Styrene Emissions Through Various CIPP Coating Materials Details from the Latest NASSCO Phase 3 Study 25 Caverns of Calloway - Dirt Pipes are Expensive After a heavy rainfall in June 2022, the Trinity River Authority was notifi ed of a sanitary sewer overfl ow on a sewer line within the Walker Calloway System, a 4.7-mile wastewater collection system. DEPARTMENTS 28 Pressure Pipe Rehabilitation - What's on the Menu? Trenchless methods have been widely used for the rehabilitation of gravity pipelines for some time. 34 NASSCO Tech Tips PACP condition grading system 37 Emergency Repair of Unexpected Leak for NTMWD A leak was discovered in a storm drain located under a 16-inch force main. Due to rare circumstances - one pipe's leak was being captured by another pipe. 40 Exploring the Future of the Manhole Camera Industry: Unlocking Hidden Insights The manhole camera industry has undergone signifi cant advancements in recent years, revolutionizing the way we inspect and maintain underground infrastructure. 41 Rehab News REHABILITATION EMERGENCY REPAIR of Unusual Leak Details from NASSCO PHASE 3 STUDY CAVERNS OF CALLOWAY ACCURATE INFRASTRUCTURE MAPPING with An App PRESSURE PIPE REHAB - What's on the Menu? 4 Exclusives from UndergroundInfrastructure.com 6 Editor's Log 8 Newsline 10 Washington Watch 42 Business 49 New Products 50 Business Cards 51 Calendar of Events / Ad Index / Sales Offi ces UndergroundInfrastructure.com / July 2023 ON THE COVER A deteriorated culvert in York, Ontario, Canada was recently rehabilitated by Aqua Tech Colutions who used spray-on products from Nukote Coating Systems. UndergroundInfrastructure.com | JULY 2023 3http://www.UndergroundInfrastructure.com