banner
home government section contact information news & events about amherst
 
 
Government

Administrative link
Boards & Committees link
Elected Officials link
Employee Directory link
Municipal Buildings link
Public Infrastructure link
Public Safety link
Public Services link
Entire Listing link

 

Municipal Building
5583 Main Street
Williamsville, NY 14221

General Information
716.631.7000

website questions?

 
 
Engineering Department

Engineering Department

Contact Information

Engineering Department
  Engineering Department
Engineering Support Division
  Overview
  Amherst Cooperative Continually Operating Reference Station (CORS)
  Amherst Utility Cooperative
  Phase II Stormwater Regulations
  Sidewalk Information
Environmental Control Division
  Overview
  Concentration Based Pollutant Limits for Sanitary Sewer Users
  General Information for Businesses
  Grease Management for Food Service Facilities
  Industrial Pretreatment
  Silver Recovery for Medical & Dental Offices and Photo Finishers
  Stormwater Annual Report
  Stormwater Management Plan
  Town of Amherst Local Sewer Use Law
  Wastewater Discharge Permit Application
  Compost Facility
Sewer Maintenance Division
  Overview
  General Information
  Contact Information & Emergency Phone Numbers
  Flow Monitoring
  Glossary of Terms
  Infiltration and Inflow
  Sanitary vs Storm Sewers
  Sanitary Sewer Cleaning
  Sewage Spills and Backups
  Sewer Inspections
  Sewer Repair Work
Water Pollution Control Division
  Overview
  Description of Wastewater Treatment Facilities
  AmEarth
  Emergency Contact Information
  Facility Tours
  Facts
  Laboratory
  Maintenance
  Solids Handling


Sewer Inspections

Sewer Inspections

Inspections of the sanitary sewer system are a routine and essential duty for the Sewer Maintenance Division crews. Regular inspections can help troubleshoot and minimize problems with the collection system. Connections to the system and unwanted sources of inflow are identified through sewer inspections. As part of the sewer cleaning process, our crew chiefs inspect and report on any problems or deficiencies with the sanitary sewer system. Such items included in the inspection are:

1. Visual Inspections

Visual inspections are performed on the sewer system manholes at a higher frequency than internal inspections because of the relative ease of performance. This type of inspection can give a good indication as to the condition and proper functioning of the collection system and generally includes:

A. Manhole Inspection

  • manhole inspection photoFrame & Cover
  • Grade Adjustments
  • Flow Surcharging
  • Manhole Bottom Channels
  • Structural Integrity
  • Inflow & Infiltration into Manhole
  • Other Miscellaneous Problems

B. Sewer Inspection

  • manhole inspection 2 photoDirt & Stone Brought Back While Cleaning
  • Abnormal Amount of Debris in Line
  • Excessive Amounts of Grease in Line
  • Blockage or Obstruction in Line
  • Excessive Flow (Relative to Upstream Flows)
  • Any Miscellaneous Problems

Any of the above items would result in further study of the sewer and include T.V. inspection, sewer repair or manhole repair. Our crew chiefs have the authority to write up anything they deem to be a problem or potential problem to the sewer system.

2. Closed Circuit Television (CCTV) Inspection

closed circuit tv camera photoInternal sewer line inspections are performed to gather additional information about what is taking place between manhole access points. These typically include using CCTV inspections to photograph the sewer system.

CCTV inspections are performed for a number of reasons including:

  • Requested by cleaning crew because of a suspected problem.
  • In connection with Inflow & Infiltration investigation work.
  • Sewer rehabilitation work.
  • Routine check on the effectiveness of sewer cleaning.
  • Sewer inspection prior to road improvements.
  • Public Improvement Permits for sewer extensions.

closed circuit tv photoA CCTV inspection crew consists of a Crew Chief and two maintenance workers. The Sewer Maintenance Division has two designated CCTV inspection trucks.

3. Smoke Tests

Another form of internal inspection of the sewer system is the smoke test. Smoke testing is performed to determine the following:

  • Sources of ground water entry into the collection system.
  • Proof that a building or residence is connected to system.
  • Location of illegal connections into the sewer system including downspouts, storm water catch basins and yard drains.
  • Location of broken sewers.
  • Location of buried manholes or diversion points.

smoke testing 1 photoSmoke testing of the sewer system has the potential to affect the occupants of buildings connected to the line being tested. smoke testing 2 photoDefects in the sewer system of a building, dry traps, a defective wax ring under commodes, vents terminated in an attic, or cleanout plugs missing from sewers can cause smoke to enter the building. Therefore adequate preparation and advance public awareness is necessary to avoid panic or alarm. smoke testing 3 photoSmoke testing letter are usually sent out to each affected resident or business when smoke testing is proposed on the sewer system. A smoke crew consists of a crew chief and three observers.

4. Dye Tests

Dye testing is a method of internal inspection similar to smoke testing and provides another means of determining connections to the sewer system. Situations where dye testing may be appropriate include:

  • Locating suspected illegal connections to the sewer system at roof leaders, downspouts, catch basins and yard drains.
  • Estimating velocity of flow.
  • Proof that a building or residence is connected to the system.