Manholes Files

Case Study: Preventing Leaks While Sinking Tunnel Shafts

American Cyanamid AM-9 Technical Manual 1960

  • Problem: Twelve manhole shafts for a mile-long tunnel, part of a trunk storm sewer being constructed 50 feet below a Dallas Freeway, had to pass through 20 to 25 feet of saturated sand before reaching bedrock.

News: How to Eat an Elephant

Jay Guillot Water Control Quarterly 2002

  • Controlling inflow and infiltration is always an issue with wastewater collection systems. For the purpose of eating an elephant, we will concentrate on infiltration.

Magazine Article: How to be Assured of a Quality Grout Project

Public Works Staff Public Works Magazine 1996

  • Chemical grout has been used successfully for more than 30 years to stop leaks in sewer systems. However, not all installations have been equally successful.

Borough of Downington Stops Infiltration

Rick Harris, Borough of Downingtown Water Control Quarterly 1999

  • Like most towns or cities with public sewer systems, Downingtown was experiencing high amounts of inflow and infiltration (I & I).

Magazine Article: How to Plan a Chemical Grout Program

Avanti Public Works Magazine 1995

  • How to plan your chemical grouting program: Most infiltration enters sewers through 1. Manholes, 2. Pipe Joints and 3. Service Connections and the first few feet of the service line.

NASSCO Spec: Performance Specification Guideline for Manhole Rehabilitation

Various NASSCO 2013

  • NASSCO Performance Spec for Manhole Rehab
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