Greenline Extension Field Testing

Field Survey: Weeks ending 9/10/10 and 9/17/10:

* Survey of drainage system inverts* within the Lowell Line Commuter Rail corridor

*Inverts are elevations of the interior bottom of the existing drain pipes measured at a drainage structure.

Boring Program: Weeks ending 9/10/10 and 9/17/10:

* Borings within the MBTA Lowell Commuter Rail Line right-of-way from Brookings Street in Medford to Broadway in Medford
* Borings within the MBTA Lowell Commuter Rail Line right-of-way from Brookings Street in Medford to Lowell Street in Somerville

Boring typically occurs between 7:00 AM and 3:30 PM on weekdays.