Boston North Shore Study

Regional Saugus River Floodgate Project - Everett, Lynn, Malden, Revere and Saugus, Massachusetts

Plans Evaluated

Option #1:  Local Protection Plans
Developed areas in each community were surrounded with dikes, walls, revetments & sand dunes/beach

Option #2:  Non-structural Plans
Individual buildings were flood proofed,  or raised and warning systems developed

Option #3:  A plan to protect the entire region using a Saugus River Floodgate with walls, dikes, beach & dunes along the shore front, purchase & protect the Estuary for runoff storage & environmental resources & non-structural measures.


Option #1: Local Protection Plans (LPPs)

The 5 separate LPPs were not supported due to 4-12 foot high walls & dikes along the shores impacting views & wetlands, and need to maintain & close 80 gated openings.


Local Protection Plans



Option #1: SPN Flood + 1Ft Sea Level Rise

(Elevations in Ft. NGVD, or approx. feet above mean sea level)

Option1 SPN Flood 1Ft Sea Level Rise


Option #2: Nonstructural Plan For Residential & Commercial Buildings

Non-structural measures alone were not supported since only 7% of buildings were feasible for flood proofing or raising, and the uncertainty of evacuating over 4,000 to 10,000 people in such high levels of flooding.

Option2 Nonstructural plan


Option #3: Regional Project Protects Entire Area

Option3 Regional Project


Plan Comparison

  Option #1
5 LPPs
Option #2
Option #3
Regional Plan
Buildings Protected 4,320 240 5,000
Percent Protected 86% 7% 100%
Length of Structures 9.8 Miles N/A 3.5 Miles
Wetlands Lost, Mitigated 34 Acres None 3 Acres
Estuary Protection No No Yes
Loss of Views High, up to 12 ft.
High Walls/Dikes
NIL 15-20 Homes at
Point of Pines
Level of Flood Protection      
City of Lynn, East Saugus 500 Yr 0-100 Yr SPN
Town Line Brook 100 N/A SPN
Point of Pines w/Dunes Only SPN 0-100 SPN
Revere Beach Backshore 100-SPN 0-100 SPN
Northgate, Outer Oak Island No 0-100 SPN
Upper Saugus River, Rt. 107, B&M No No SPN
Crescent Beach 100 0-100 100
Plan Economics (2019 Price Level, $ Millions)
First Cost $183 $19 $220
Average Annual Benefits $23.37 $3.61 $28.28
Average Annual Cost $17.80 $1.81 $22.29
Average Annual Net Benefits $5.57 $1.8 $5.99
Benefit-to-Cost Ratio 1.3 2.0 1.3
National Economic Development Plan No No Yes
Benefits & costs updated from 1988 with a construction cost index
Complete, Efficient Yes Yes Yes
Effective Partial
w/ 80 Gates
No Highest
Acceptable to Sponsor Minimal Minimal High
National Economic Development Plan No No Yes

Show Your Support

Please contact your community representatives with letters and emails of support or concerns.

Directory of Local Reps


Definitions & Abbreviations