February 2021 EXHIBIT B
City of Nashua, NH
Siphon Rehabilitation
Scope of Work for Engineering Design Services
Background
During the Phase 1 of the City’s CMOM program the City’s eight inverted siphons were cleaned and inspected.
The siphons were constructed between the 1960’s and the early 1980’s. Six siphons are triple-barrel and two are
double-barrel comprised of various materials and diameters ranging from 6 inches to 60 inches in diameter.
Below is an inventory of the siphons inspected:
Table 1 Inventory of Siphons Inspected
weak Name ee Size (in) Material — Length (ft)
18 RCP
CSO 6 Trestle Bridge Nashua River 48 RCP 183
60 RCP
10 Cl
Canal St Parking Lot Nashua River 36 RCP 252
36 RCP
21 RCP
Main St Nashua River 30 RCP 180
60 RCP
10 Cl
Fairmount St Nashua River 18 RCP 280
30 RCP
21 RCP
Exit 6 Nashua River 16 Cl 247
8 Cl
a ~ a.
Palisade Dr Salmon River 280
24 Cl
La "noo
7 New Searles Salmon River 70
24 DI
6 DI
Kathy Dr Salmon River 8 DI 186
10 DI
Hazen and Sawyer (Consultant) shall perform engineering services for the rehabilitation of seven of the City’s
eight siphons. The scope includes the following tasks:
Task A Project Administration, Meetings and Quality Assurance/Quality Control
Task B_ Design and Bidding Phase Service
