Final Environmental Impact Report - Whittier Bridge/I-95 ...

Final Environmental Impact Report - Whittier Bridge/I-95 ... Final Environmental Impact Report - Whittier Bridge/I-95 ...

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Whittier Bridge/I-95 Improvement Project FEIR Chapter 2.0: Response to Comments on the Environmental Assessment/Draft Environmental Impact Report design, with spans twice the length of the Whittier and trusses proportionally larger, seventeen years older, subject to the same, if not worse weather conditions, is still functioning smoothly and is well-maintained, while the Whittier is undoubtedly in need of a major overhaul or , replacement. WHY IS IT THAT THE SAGAMORE WAS REHABILITATED IN THE 1980'S, INCLUDING DECK AND CABLE REPLACEMENT, FOR $20 MILLION, CLOSING ONE LANE AT A TIME, WHILE THE DOT CLAIMS THIS IS IMPOSSIBLE FOR THE WHITTIER Response: Although similar, the environmental winter conditions are very different for the Whittier Bridge and the Sagamore Bridge over the Cape Cod Canal. The weather on Cape Cod is relatively more temperate then the Merrimack Valley, and this requires less deicing salts which are problematic for the lattice built-up truss members. During the winter months the Whittier Bridge experiences almost daily freeze and thaw cycles, while the Sagamore Bridge experiences far fewer freeze and thaw cycles. In addition, I-95 has a higher operating speed and a higher volume of truck traffic than US Route 6 over the Sagamore Bridge. All of these issues contribute to the deterioration of the structure resulting in the structural obsolescence of the Whittier Bridge. The Whittier Bridge underwent a complete deck replacement in the 1970s when traffic volumes were much lower and a lane could be taken out of service to perform this work. Hanger modifications were made in the late 1990s to further extend the life of the structure. The structural problems with the Whittier Bridge go beyond the need for deck replacement and include deterioration to the arches with widespread pack rust occurring at the riveted connections which increases the long-term structural risk to the structure. Structurally non-redundant bridges like the Whittier Bridge require a more conservative engineering approach since the tragedy of the I-35W bridge collapse in Minneapolis in 2007. JH-6: Secondly, the Sagamore comparison begs the obvious question which the DOT should also address: How is it that between the yearly inspection process and the Department's budget and maintenance procedures the Whittier ended up in the decrepit condition it is in today The DOT's own inspection reports claim they have no idea when the bridge was last painted. Is this really possible (Neighbors don't recall it being painted since the early 1970's.) Shouldn't the DOT be looking for 'lessons learned' here so we don't end up in the same situation down the road with a new bridge Obviously, if the bridge had been properly maintained all these years, this discussion wouldn't even be taking place. Response: MassDOT‘s bridge and structural engineers for the project have determined that the Whittier Bridge cannot be safely rehabilitated. The Whittier Bridge is a steel-riveted built-up truss bridge built in 1951. Truss bridges comprise multiple non-redundant members. A failure of one member, in either tension or compression, could cause the bridge to collapse. The bridge was originally designed to carry only two lanes of traffic in each direction with full breakdown lanes. In the 1960s, it was reconfigured to three lanes without shoulders in each direction, and traffic volumes have increased the fatigue loading by 50 percent. Significant corrosion has also occurred to structural elements of the bridge, including truss floor beams and stringers, bracing, wind chords, and gusset plates, with the most severe deterioration occurring to members exposed to deicing salts at the edges of the bridge and in the open medians between the northbound and southbound roadways. Substantial recent repairs have been completed to maintain the bridge in a safe condition for existing traffic and to ensure public safety. However, these repairs are temporary and address only the immediate load-carrying needs of the bridge; they neither provide permanent repairs nor do they address long-term fatigue-life considerations. Because of the extensive deterioration of the existing structure, the temporary nature of the near- 2-60

Whittier Bridge/I-95 Improvement Project FEIR Chapter 2.0: Response to Comments on the Environmental Assessment/Draft Environmental Impact Report term repairs, and the indeterminate nature of much of the structure, rehabilitation is considered impracticable and uneconomic for the following reasons: 1) The original design details, such as the gusset plates, are susceptible to environmental corrosion, which leads to extensive deterioration and indeterminate but anticipated damage caused by pack rust within built up plates and gusseted plate connections. 2) Based on costs of similar recent bridge rehabilitation projects in New England and considering the deteriorated structural bridge elements that need replacement, the cost of rehabilitating the Whittier Bridge (including construction and subsequent demolition of a temporary detour bridge) would greatly exceed the cost of constructing a replacement bridge built to modern standards. JH-7: Should the DOT construct a replacement for the Whittier Bridge, I would suggest considering alternatives to the green color so prevalent on our highways. Putting aside the 'historic' nature of green, you might also look at Cor-ten steel which, although it causes staining, has definite maintenance advantages over paint. Even if Cor-ten is eliminated, a color resembling that might be a refreshing change from 'DOT green.' Response: MassDOT has not made a final decision on the paint color for the new Whittier Bridge at this time. 2.6.5 Anne Federici, Whittier Point Condominium Association Anne Federici, President of the Whittier Point Condominium Association submitted a letter dated December 21, 2011. WPCA-1: Safety - we have already been exposed to dangerous situations both on this bridge and highway through serious accidents on the highway. If that road is closer, accidents; dangerous chemical spills; chemicals for ice and snow; noise volumes all create serious threats to residents in the condo complex including three young children under 6 and senior citizens. Response: The Whittier Point Condominium Association sent a detailed letter to MassDOT in February, 2011. Their letter is included in Section 8.5.12 of the EA/DEIR with responses. Although the relocated I-95 northbound roadway will be closer to the property, it will be separated from the traffic lanes by the following: a full 10-foot breakdown lane; a jersey barrier between the breakdown lanes and the 16-foot wide shared use path, and a snow fence on top of a jersey barrier on top of the retaining wall adjacent to the property (extending 12-feet high above the level of the road). MassDOT believes that the design of the project will result in safe operating conditions along I-95. WPCA-2: Aesthetic devaluation - our properties retain value because of our natural environment for birds, eagles, animals and fish. This new bridge will disrupt this environment and the construction may impact forever this setting. Having a bridge almost directly in front of our condos destroys this visual setting. The project will not result in adverse long-term impacts to the natural environment of the area, following temporary construction period impacts. Response: It should be noted that the new I-95 northbound bridge, although closer to the property than the existing bridge, will be constructed entirely within the existing 1951 state highway layout. 2-61

<strong>Whittier</strong> <strong>Bridge</strong>/I-<strong>95</strong> Improvement Project FEIR<br />

Chapter 2.0: Response to Comments on the <strong>Environmental</strong> Assessment/Draft <strong>Environmental</strong> <strong>Impact</strong> <strong>Report</strong><br />

term repairs, and the indeterminate nature of much of the structure, rehabilitation is considered<br />

impracticable and uneconomic for the following reasons:<br />

1) The original design details, such as the gusset plates, are susceptible to environmental<br />

corrosion, which leads to extensive deterioration and indeterminate but anticipated damage<br />

caused by pack rust within built up plates and gusseted plate connections.<br />

2) Based on costs of similar recent bridge rehabilitation projects in New England and<br />

considering the deteriorated structural bridge elements that need replacement, the cost of<br />

rehabilitating the <strong>Whittier</strong> <strong>Bridge</strong> (including construction and subsequent demolition of a<br />

temporary detour bridge) would greatly exceed the cost of constructing a replacement bridge<br />

built to modern standards.<br />

JH-7: Should the DOT construct a replacement for the <strong>Whittier</strong> <strong>Bridge</strong>, I would suggest considering alternatives to the<br />

green color so prevalent on our highways. Putting aside the 'historic' nature of green, you might also look at Cor-ten<br />

steel which, although it causes staining, has definite maintenance advantages over paint. Even if Cor-ten is<br />

eliminated, a color resembling that might be a refreshing change from 'DOT green.'<br />

Response: MassDOT has not made a final decision on the paint color for the new <strong>Whittier</strong> <strong>Bridge</strong> at<br />

this time.<br />

2.6.5 Anne Federici, <strong>Whittier</strong> Point Condominium Association<br />

Anne Federici, President of the <strong>Whittier</strong> Point Condominium Association submitted a letter dated<br />

December 21, 2011.<br />

WPCA-1: Safety - we have already been exposed to dangerous situations both on this bridge and highway through<br />

serious accidents on the highway. If that road is closer, accidents; dangerous chemical spills; chemicals for ice and<br />

snow; noise volumes all create serious threats to residents in the condo complex including three young children<br />

under 6 and senior citizens.<br />

Response: The <strong>Whittier</strong> Point Condominium Association sent a detailed letter to MassDOT in<br />

February, 2011. Their letter is included in Section 8.5.12 of the EA/DEIR with responses.<br />

Although the relocated I-<strong>95</strong> northbound roadway will be closer to the property, it will be separated<br />

from the traffic lanes by the following: a full 10-foot breakdown lane; a jersey barrier between the<br />

breakdown lanes and the 16-foot wide shared use path, and a snow fence on top of a jersey barrier<br />

on top of the retaining wall adjacent to the property (extending 12-feet high above the level of the<br />

road). MassDOT believes that the design of the project will result in safe operating conditions along<br />

I-<strong>95</strong>.<br />

WPCA-2: Aesthetic devaluation - our properties retain value because of our natural environment for birds, eagles,<br />

animals and fish. This new bridge will disrupt this environment and the construction may impact forever this setting.<br />

Having a bridge almost directly in front of our condos destroys this visual setting. The project will not result in adverse<br />

long-term impacts to the natural environment of the area, following temporary construction period impacts.<br />

Response: It should be noted that the new I-<strong>95</strong> northbound bridge, although closer to the property<br />

than the existing bridge, will be constructed entirely within the existing 1<strong>95</strong>1 state highway layout.<br />

2-61

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