Cumulatively, these floodplain storage locations lead to the reduction of peak discharges significantly in downstream reaches. Existing utilities would need to be evaluated and possibly relocated or raised along with the roadway. Detailed hydrologic and hydraulic models need to be developed as part of the data collection and analysis process. At a press conference at the Westchester County Center, Astorino also announced the DRC will remain open until Dec. 21 on a six-day schedule. Weve helped hundreds of businesses, and there are absolutely still businesses out there that need help. [14] Mileage and time estimates are based on Google Maps. Hurricane Sandy barreled into Westchester on Oct. 29, bringing high winds that toppled hundreds of trees and caused coastal flooding along the Long Island Sound and Hudson River. Recognizing that the entire Parkway as well as other similar roadways in Westchester County may be vulnerable to an increase in the frequency and magnitude of precipitation events of various return periods in the future, this assessment also proposes that drainage design guidelines be updated to account for the projected changes to extreme precipitation patterns.

Alternatives to raising or relocating the roadway include: These alternatives will help to improve river conveyance. Climate Change in New York State: Updating the 2011 ClimAID Climate Risk Information. Truck traffic is not permitted on this portion of the Saw Mill River Parkway; therefore AADTT is not applicable to this analysis. These maps indicate various flood conditions, highlighting Special Flood Hazard Areas subject to inundation by the 100-Year flood, also known as the base flood.

WESTCHESTER, N.Y. Hurricane Sandy is expected to bring life-threatening storm surge flooding to coastal areas, according to the National Weather The engineering informed adaptation assessments conducted for the Post-Hurricane Sandy Transportation Resilience Study in NY, NJ, and CT, focus on specific facilities in specific locations, and each of the assessments acknowledges and accounts for the local aspects of the assets. For example, the 1 percent annual chance (100-Year) peak discharge in Saw Mill River at Ashford Avenue is 1,967 cubic feet per second for 20.4 square miles of drainage area, which is approximately 20% lower than a peak discharge of 2,344 cubic feet per second at the Woodland Lake outlet, which is upstream of Ashford Avenue and accommodates 19.7 square miles of drainage area. Asphalt paved ditches increase the velocity and capacity of the ditch. This strategy recommends that instead of asphalt ditches, bioswales replace the existing unpaved shoulders to move stormwater away from the Parkway. A cross roadway drainage system should be constructed to carry water from the roadside ditches to the adjacent Saw Mill River to be discharged. Local roads including Saw Mill River Road (New York State Route 9A) and U.S. 9 (Broadway) can accommodate local traffic handled by the Saw Mill River Parkway, although Saw Mill River Road, which runs adjacent to the Parkway, is often affected by the same flooding that affects the Parkway. The engineering informed adaptation assessments conducted for the Post-Hurricane Sandy Transportation Resilience Study in NY, NJ, and CT, focus on specific When the debris is cleared, the chance of flooding is decreased. The proposed drainage system would also need to meet other stormwater management requirements related to the volume of discharge.

These two return periods were selected because the storm drainage system at Saw Mill River Parkway should be designed in accordance with NYSDOT standards, and Chapter 8 of the NYSDOT Highway Design Manual specifies that storm drainage systems on interstates and other freeways be designed for a 10-year storm frequency, with locations at sag vertical curves (curves that connect descending grades forming a bowl or sag) designed for a 50-year storm frequency. A more precise estimate of the aggregate additional miles traveled (and associated person hours of delay) would require the use of a regional travel demand model. Located at the County Center (198 Central Ave., White Plains), the facility will be staffed from 8 a.m. to 6 p.m. seven days a week.

Figure 11: Historical and Future IDF Curve for 50-Year Return Period. With a detention basin, the orifice level is at the bottom of the basin, and therefore all the water is eventually drained from the basin and it remains dry between storms.

In addition, these engineering informed assessments were conducted as part of a research study with limited resources and, in many cases, additional study and analysis would be required to fully assess the set of options for addressing the vulnerabilities identified through the assessment. While an expensive option, it would effectively remove roadway infrastructure from the floodplain, specifically downstream of Lawrence Street where the water surface elevations during specific storm events go over the bridge elevations, and flooding concerns are among the most significant along the different segments of the roadway. [20] It is likely that some share of vehicles that would normally travel on this segment of the Saw Mill River Parkway would not use the assumed detour route and could have a shorter or longer detour. The drainage system proposed in this strategy would have a lower environmental impact at the outlet compared to conventional systems, as stormwater runoff pollutants would be treated through bioswales, which would remove sediments, reduce nutrient loading and attenuate peak flow conditions from small storms, therefore reducing erosion at the outfalls. Intense Rainfall Events: During a storm event, precipitation and storm water runoff increase the volume, as well as peak flows in the Saw Mill River.

If we had waited for the insurance company to cut us a check, we would have never opened in 2013. When the grass is overgrown and the ground is saturated from heavy rain, the grounds infiltration rate decreases. H urricane Sandy rolled through Westchester County two years ago this October, leaving a trail of It is estimated that construction of the asphalt ditches would take approximately six months; however, the design process and permit application process must take place prior to construction and could take several years depending on the agencys ability to find the funding, and carry out the design process. Such an analysis is outside the scope of this project. This segment was chosen by NYSDOT for further analysis in this assessment.

With further buildup of debris and/or an increased volume of water in the channel due to a storm event, the river will backup and overflow its banks. [2] Time of concentration is a concept used to measure the response of a watershed to a rain event, defined as the time needed for water to flow from the most remote point in a watershed to the watershed outlet. There are numerous considerations when evaluating alternatives to mitigate flooding. Therefore both the economic travel time and vehicle operating costs per event were multiplied by 90 percent for moderate to heavy rainstorm events and by 40 percent for severe storms/hurricanes. During Hurricane Sandy, the Middlesex County Utility Authority lost power to its water utility intake pump. WebWHITE PLAINS As part of his ongoing probe of high gasoline prices in the wake of Hurricane Sandy, Attorney General Eric T. Schneiderman today announced that The Saw Mill River Parkway was built in the 1930s and is under the jurisdiction of the New York State Department of Transportation (NYSDOT).

WebThe Hudson Valley/ Westchester County Region has nine NY Rising communities distributed over three counties Orange, Rockland, and Westchester. Due to maintenance challenges, compounded with the Parkways flat longitudinal slope (grade or incline), these grass ditches are not effectively carrying the water away from the Parkway. When Hurricane Sandy hit on Oct. 29, it left more than 300,000 Westchester County residents without power, including more than 11,000 in White Plains, about half of Consolidated Edison's The build-up of debris at bridge and culvert openings further constricts the rivers flow. The agreements come on the heels of 25 previous

Weve lifted several buildings in low-lying coastal areas like Rye and Mamaroneck. The costs that would change due to higher rainfall intensity for this relatively small tributary area would be capacity-related (i.e. Emergency Alert Sign-Up; Bee-Line Rider Alerts; Severe Weather; 211 For Non-Emergencies; Indian Point Safety The regions WebWestchester (County) Public Assistance State, local, tribal and territorial governments and certain private-non-profit organizations in these designated counties are eligible for Undersized culverts can create a bottleneck, restricting the rivers flow, resulting in flooding when the water cannot pass through the culvert and is diverted. Homes in Seaside Heights, New Jersey sit in ruins on the Atlantic Ocean waterfront after being destroyed by Hurricane Over at the Pier, our freezer got blown to smithereens, so we had a couple thousand pounds of shrimp strewn across the sea walk area. For a hurricane/severe flooding event, the full AADT was used because the closure was assumed to last 24 hours. Source: The construction costs were calculated with unit prices based on the New York State Department of Transportation Pay Item Catalog (PIC), which includes regional and statewide average awarded price history as soon as a project has been awarded.

Since flooding conditions are similar throughout the Parkway, adaptation strategies developed for this segment could be applied to other segments as well. The map identifies the areas at risk for flooding. Our own office has flooded three times in four years. New York: Strategies at three levels can be taken to manage and mitigate the impacts of riverine flooding on roadway facilities: In this assessment, three specific adaptation strategies are reviewed using the criteria laid out in the engineering informed adaptation assessment process tested in this research effort: A Watershed Master Plan can be utilized to recognize issues with water conveyance within the Saw Mill River watershed and recommend strategies for flood mitigation.

Weve properly insured ourselves, repositioned some equipment. Analysis assumes that a hurricane/severe flooding event would close the road for 24 hours, as it did with Hurricane Irene. Based on the anticipated service life of storm drain systems, it is proposed by the project team that end-of-century precipitation projections be considered in proposed improvements to the existing drainage system at the Saw Mill River Parkway segment. Part of the training was a simulation using data from the Hurricane of 1938 that caused major losses on Long Island and in Westchester.

The proposed drainage system with asphalt ditches could have an environmental impact at the outlet, depending on where the system discharges. As mentioned in Section 2, the NRCC at Cornell University has developed projections for the increase in the magnitude and frequency of precipitation events at the Dobbs Ferry, NY location, using NARCCAP and CMIP5 simulations. Another task to be completed at the beginning of the project is land acquisition.

The NARCCAP and CMIP5 simulations are based on the A2 and RCP-8.5[7] future global greenhouse gas (GHG) emissions scenarios, respectively. However, a review of the effective FEMA Flood Insurance Study and watershed patterns indicates that there is low potential to enhance existing storage capacity in ponds and swamps along the Saw Mill River and its major tributaries. The flooding of the Saw Mill River is primarily due to inadequate channel conveyance capacity and lack of storage in the watershed. EPAs assistance at this site was no longer required as of December 7. An existing curb opening on the Saw Mill River Parkway in need of maintenance is shown in Figure 7. The hardest hit areas were New York City and the counties of Suffolk, Nassau, Westchester, and Rockland. Drainage Inlets: 6 inlets x $4,000/inlet = $24,000, Roadway Crossing Pipes: 3 pipes x 55/pipe x $110/ft. This strategy could potentially prevent adverse impacts on mobility and the economy from disruptions to the Parkway, which would otherwise occur during moderate to heavy rainstorms. The time of recovery/duration of disruption depends on the extent of the rainfall amount and the ability of the drainage system to handle the volume. This stretch of Parkway also serves local trips between the river towns in Westchester County and unincorporated areas in the Town of Greenburgh. Undersized Roadway Bridges: The presence of bridges and culverts affect the Saw Mill Rivers normal course.

I would never consider going elsewhere..

NRCC provided the projected percent change in the magnitude of precipitation over a duration of 24 hours for precipitation events of various return periods for the mid-century (2040-2069) horizon.

Either way, attendance at Playland was way down in 2013 [people didnt know it was open], and it had a damaging effect on our business. Survey Stake-Out (2% of total construction cost), Engineering Cost (13% of total construction cost), Maintenance and Protection of Traffic (MPT).

During Hurricane Irene, the Parkway was closed for 24 hours due to 12 inches of flooding. Press Releases; Departments Look up County department; Boards and Commissions Contacts and meeting schedules; Alerts Goes to Emergency Services.

These guidelines can be applied to all new construction and updates to existing drainage systems on State- and locally-maintained roadways in Westchester County. In New York City, the majority of deaths occurred in The original waterway opening under a bridge may become inadequate over time as a result of changing drainage patterns and land use conditions in the watershed.

Located at the County Hurricane Sandy School Closings Updated 4:45 p.m. Sunday: Based on information received this afternoon from Southern Westchester BOCES, the following schools will be closed on Monday. By using an updated IDF curve, 10- and 50-year design storms, as specified in the current Highway Design Manual, can continue to be used to provide an adequate number of drainage structures to accommodate end-of-century projections. As noted in previous sections, a lifecycle cost comparison of these adaptation alternatives can provide further insight into the overall costs and benefits of each alternative. Two alternate highway routes the New York State Thruway (I-87) and the Sprain Brook Parkway run parallel to the Saw Mill River Parkway and can accommodate longer-distance trips in the corridor when the Saw Mill River Parkway is closed. The company is working closely with the New York City Office of Emergency Management, the Westchester Office of

WebWHITE PLAINS As part of his ongoing probe of high gasoline prices in the wake of Hurricane Sandy, Attorney General Eric T. Schneiderman today announced that The magnitude of precipitation events in the Parkway corridor is also likely to increase based on projections developed by the Northeast Regional Climate Center (NRCC) at Cornell University for the Dobbs Ferry, NY location. [11] See Table 4.

The specific scenarios for projected changes to the frequency of extreme precipitation events were selected by NYSDOT based on a report developed by the New York State Energy Research and Development Authority (NYSERDA) entitled Climate Change in New York State (ClimAID, 2014).

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This debris can influence the shape of the river bed. A bioswale is an engineered vegetated system that uses specific soil and plant configurations to infiltrate stormwater runoff and remove sediments and other pollutants while still providing flow conveyance.

The agreements come on the

While this strategy can lead to enhanced drainage systems in the future, it is assumed in this analysis, that this strategy will not have direct economic, environmental, or equity-related impacts on the Parkway. This block group is located north of Parkway segment evaluated in this assessment, and commuters in this block group going south towards New York City could also be impacted if the segment is closed, assuming they use the Parkway.

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