NJ-NY ERFO FW WARI 2019-1 Geo Memo
Updated
A PDF document (9.9 MB) attached to NJ-NY ERFO FW WARI 2019-1(1) - Wallkill River National Wildlife Refuge, from the Federal Highway Administration. Due Dec 15, 2026, 2:00 PM (UTC-5).
File name: NJ-NY ERFO FW WARI 2019-1(1)_Geo_Memo.pdf
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SUBJECT: Project NY ERFO FW WARI 2019-1(1) – Geotechnical Recommendations for Gabion Baskets Retaining Walls in the Wallkill River National Wildlife Service TO
G. Riffle
Assistant
Project
Manager
K. Roman
Project
Manager
Through:
M.
Carruthers
Project
Management
Branch
Chief
MESSAGE/COMMENT
INTRODUCTION
This Geotechnical Memorandum summarizes the results of our subsurface exploration, laboratory testing, and geotechnical evaluations and recommendations for the construction of two (2) gabion basket retaining walls along the Winding Waters Trail located in Wallkill River National Wildlife Refuge, in Orange County, New York. Figure No. 1 in Appendix A shows the site location and vicinity maps.
GENERAL PROJECT INFORMATION
Background
Heavy rain and storms caused erosion and slope failures in Winding Water trail at sites 240 and 324.
Project Description
The project includes the construction of two (2), 300 ft long, earth retaining structures at sites 240 and 324, to re-establish embankment of the river.
EFLHD GEOTECHNICAL STUDY
Site Geology
The geologic map of New York State (Fisher, et al., 1970) indicated that the project sites are located within the Wappinger Group, which consists of limestone, dolostone, shale, and chert of Cambrian-Lower Ordovician age. The geologic map of the project area is included in Figure No. 2 in Appendix A.
PROCEDURES AND RESULTS
General
A subsurface exploration program was conducted on March 2022 by EFLHD Subsurface Exploration Team. The program consisted of drilling five (5) soil borings, three (3) borings in Site 240 and two (2) borings in Site 324. Borings were drilled using a CME 750 drill rig mounted on a rubber tired all-terrain vehicle (ATV). Boreholes were advanced using 3-¾-inch (ID) hollow stem augers (HSA) and were terminated upon reaching auger refusal or after reaching the planned borings depth. Boring locations were laid out by EFLHD personnel in the field by referencing topographic features, measuring distances from existing surface features, and using a hand-held GPS equipment. Approximate boring locations is shown on the Borings Location Plan in Appendix B.
FROM/DATE
Y. Perez,
Geotechnical
Engineer
YESENIA Digitally signed
by YESENIA
STEPHANI STEPHANIE
SOTO
E PEREZ PEREZ
Date: 2024.09.09
15:07:42 -04'00'
SOTO
M.
Abouzakhm, PE
Division
Geotechnical
Engineer
signed by
MOUNIR A Digitally
MOUNIR A
ABOUZAKHM
ABOUZAK
Date: 2024.09.10
HM
07:10:29 -04'00'
Through:
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