Div_00.pdf

Lower Rio Grande Flood Control Project Rehabilitation of Main Floodway, From 23rd Street to FM 1015 Hidalgo County, Texas

DIVISION 00-

USIBWC Contract No.: IBM09B0005 PROCUREMENT AND CONTRACTING REQUIREMENTS

US INTERNATIONAL BOUNDARY & WATER COMMISSION

GOVERNING TECHNICAL SPECIFICATIONS AND PROVISIONS

DIVISION 00 – PROCUREMENT AND CONTRACTING

REQUIREMENTS

(INTRODUCTORY / AVAILABLE INFORMATION)

DIVISION 00-

USIBWC Contract No.: IBM09B0005 PROCUREMENT AND CONTRACTING REQUIREMENTS

This Page Intentionally Blank

PROJECT TITLE

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INTRODUCTORY INFORMATION 00.01.01

The title of this project is as follows:

International Boundary & Water Commission – United States Section

Rehabilitation of Main Floodway (North and South Levee), From 23rd Street to FM 1015

USIBWC Contract No.: IBM09B0005 Page 00.01.01 - 2

TABLE OF CONTENTS

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INTRODUCTORY INFORMATION 00.01.10

US INTERNATIONAL BOUNDARY & WATER COMMISSION

GOVERNING SPECIFICATIONS AND PROVISIONS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

SPECIFICATION 00 01 01 PROJECT TITLE

SPECIFICATION 00 01 10 TABLE OF CONTENTS

SPECIFICATION 00 01 15 LIST OF CONTRACT DRAWINGS

SPECIFICATION 00 01 20 LIST OF SCHEDULES

SPECIFICATION 00 31 19 EXISTING CONDITION INFORMATION

SPECIFICATION 00 31 21 SURVEY INFORMATION

SPECIFICATION 00 31 24 ENVIRONMENTAL ASSESSMENT INFORMATION

SPECIFICATION 00 31 26 EXISTING HAZARDOUS MATERIAL INFORMATION

SPECIFICATION 00 31 32 GEOTECHNICAL DATA

SPECIFICATION 00 31 43 PERMIT APPLICATION

SPECIFICATION 00 31 50 OTHER PROJECT INFORMATION

DIVISION 01 - GENERAL REQUIREMENTS

SPECIFICATION 01 01 00 IDENTIFICATION OF TECHNICAL SPECIFICATIONS

SPECIFICATION 01 19 00 SCOPE OF WORK

SPECIFICATION 01 27 00 MEASUREMENT AND PAYMENT

SPECIFICATION 01 31 00 PROJECT MANAGEMENT AND COORDINATION

SPECIFICATION 01 32 00 CONSTRUCTION PROGRESS DOCUMENTATION

SPECIFICATION 01 33 00 SUBMITTALS

SPECIFICATION 01 39 00 SAFETY

SPECIFICATION 01 42 00 REFERENCES

SPECIFICATION 01 46 00 QUALITY CONTROL / QUALITY ASSURANCE

SPECIFICATION 01 51 00 TEMPORARY UTILITIES

SPECIFICATION 01 56 00 BARRICADES AND SIGNS

SPECIFICATION 01 57 00 TEMPORARY EROSION, SEDIMENTATION AND

ENVIRONMENTAL CONTROLS

SPECIFICATION 01 59 00 TEMPORARY CONTROLS FOR WORK AREAS / PROJECT-

SPECIFIC LOCATIONS

SPECIFICATION 01 69 00 CONTROL OF MATERIALS

SPECIFICATION 01 70 00 MOBILIZATION

SPECIFICATION 01 71 00 FIELD ENGINEERING

SPECIFICATION 01 77 00 CONTRACT CLOSE-OUT

DIVISION 02 - EXISTING CONDITIONS

SPECIFICATION 02 02 00 EXISTING CONDITIONS & FACILITIES

SPECIFICATION 02 91 00 INSTALL, REMOVE AND/OR RELOCATE FENCE

DIVISIONS 31 / 33 - SITE GRADING

SPECIFICATION 31 04 00 REMOVING CONCRETE

STANDARD DIVISIONS

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SPECIFICATION 31 11 00 PREPARING RIGHT OF WAY

SPECIFICATION 31 14 00 REMOVE / STOCKPILE EXISTING MATERIALS

SPECIFICATION 31 81 00 PROOF ROLLING

SPECIFICATION 31 92 00 VEGETATION FOR EROSION CONTROL

DIVISION 35 - WATERWAY / MARINE

SPECIFICATION 35 41 00 CONSTRUCTION OF LEVEE

DIVISION 50 - ROADWAY CONSTRUCTION

SPECIFICATION 50 11 00 ROADWAY EMBANKMENT

SPECIFICATION 50 12 00 ROADWAY EXCAVATION

SPECIFICATION 50 20 00 ROADWAY BASE

SPECIFICATION 50 21 00 PRIME COAT

SPECIFICATION 50 22 00 ASPHALT ANTISTRIPPING AGENTS

SPECIFICATION 50 23 00 EQUIPMENT FOR ASPHALT CONCRETE PAVEMENT

SPECIFICATION 50 24 00 ASPHALT, OILS, AND EMULSIONS

SPECIFICATION 50 25 00 HOT MIX ASPHALT CONCRETE PAVEMENT

SPECIFICATION 50 60 00 CONCRETE PAVEMENT

DIVISION 60 - STRUCTURES

SPECIFICATION 60 10 00 EXCAVATION AND BACKFILL FOR STRUCTURES

SPECIFICATION 60 20 00 CONCRETE STRUCTURES

SPECIFICATION 60 21 00 HYDRAULIC CEMENT

SPECIFICATION 60 27 00 SURFACE FINISHES FOR CONCRETE

SPECIFICATION 60 34 00 ROADWAY APPROACH SLABS

SPECIFICATION 60 38 00 CLEAN AND SEAL JOINTS

SPECIFICATION 60 40 00 REINFORCING STEEL

SPECIFICATION 60 41 00 STEEL STRUCTURES

SPECIFICATION 60 42 00 METAL FOR STRUCTURES

SPECIFICATION 60 45 00 GALVANIZING

SPECIFICATION 60 46 00 CLEANING AND PAINTING STEEL

SPECIFICATION 60 47 00 STRUCTURAL BOLTING

SPECIFICATION 60 48 00 STRUCTURAL FIELD WELDING

SPECIFICATION 60 64 00 REINFORCED CONCRETE PIPE

SPECIFICATION 60 65 00 MANHOLES AND INLETS

SPECIFICATION 60 66 00 HEADWALLS AND WINGWALLS

SPECIFICATION 60 67 00 SLOPE END – SAFETY END TREATMENT

SPECIFICATION 60 68 00 SLUICE GATES

SPECIFICATION 60 71 00 GRATES AND LADDERS

SPECIFICATION 60 79 00 ABANDON AND PLUG STRUCTURE

SPECIFICATION 60 80 00 FLOOD GATE

SPECIFICATION 60 98 00 CLEAN EXISTING STRUCTURES

DIVISION 90 - MISCELLANEOUS

SPECIFICATION 90 79 00 HEAVY DUTY VEHICULAR GATE

SPECIAL DIVISIONS

LIST OF CONTRACT DRAWINGS

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INTRODUCTORY INFORMATION 00.01.15

The Contract Drawings applicable to this Contract are entitled: “United States Section International Boundary and Water Commission, Lower Rio Grande Flood Control Project, Rehabilitation of Main Floodway North and South Levees, From 23rd Street to FM 1015.” An index of drawings is identified on the title sheet, and includes the following:

INDEX OF SHEETS-MAIN FLOODWAY NORTH AND SOUTH LEVEE

FROM 23RD ST. TO FM 1015

SHEET NO. DESCRIPTION

01.01 TITLE SHEET

02.01-02.06 PROJECT LAYOUT

02.07-02.34 SURVEY CONTROL SHEETS

03.01 GENERAL NOTES & SPECIFICATION DATA

04.01 ESTIMATE OF QUANTITIES

05.01-05.05 SUMMARY OF LEVEE

05.06-05.08 SUMMARY OF SMALL STRUCTURES

06.01 EXISTING TYPICAL SECTIONS

06.02-06.04 PROPOSED TYPICAL SECTIONS

07.01-07.30 ALIGNMENT DATA SHEET

08.01-08.184 PLAN & PROFILE – LEVEE

08.185-08.264 PLAN & PROFILE – INTERSECTING ACCESS ROADS

08.265-08.269 PLAN & PROFILE – INTERSECTING ACCESS ROADS

08.270 PLAN & PROFILE – INCIDENTAL CONSTRUCTION (SPUR 115 FRONTAGE RD)

09.01-09.44 BORE LOGS

10.01-10.85 PROPOSED CROSS – SECTIONS MAIN FLOODWAY NORTH (MFN1)

10.86-10.92 OMITTED

10.93-10.266 PROPOSED CROSS – SECTIONS MAIN FLOODWAY NORTH (MFN2)

10.267-10.548 PROPOSED CROSS – SECTIONS MAIN FLOODWAY NORTH (MFS1)

10.549-10.550 PROPOSED CROSS – SECTIONS INCIDENTAL CONST (SPUR 115 FRONTAGE RD)

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11 OMITTED

12.01-12.07 STRUCTURE LAYOUTS

12.08-12.011 OMITTED

12.12-12.109 CULVERT LAYOUT / CROSS – SECTIONS

12.110-12.111 GATEWELL ADJUSTMENT DETAILS

12.112-12.113 SAFETY END TREATMENTS

12.114 CONCRETE COLLAR DETAILS

12.115 EXTENDED CURB DETAIL

12.116-12.117 TCP FOR FLOOD GATES

12.118-12.119 FLOOD GATE DETAILS

13.01 SW3P

14.01 EPIC

15.01 HEAVY DUTY VEHICULAR GATE

15.02 TRAFFIC CONTROL DETAILS TYPE III BARRICADES AND LANE CLOSURES

15.03-15.14 BC-07

15.15-15.17 TEMPORARY EROSION SEDIMENT AND WATER POLUTION CONTROL MEASURES

15.18 APPROACH SLAB DETAILS

15.19 METAL BEAM GUARD FENCE

15.20 BARBED WIRE FENCE AND WOVEN WIRE FENCE TIMBER POSTS

15.21 PRECAST CONCRETE TRAFFIC BARRIER TYPE 2

15.22 POST AND CABLE FENCE

LIST OF SCHEDULES

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INTRODUCTORY INFORMATION 00.01.20

1. Schedule of Submittals. For this Project, the requirements for submittals are identified on the Contract Drawings and Technical Specifications (Divisions 00, 01, 02, 31, 50, 60, and 90). For this project, a schedule of submittals includes, but may not be limited to the following: (The Contractor shall refer to each Technical Specification for a full description of applicable submittals and submittal requirements.)

SPECIFICATION

Submittal(s)

00 31 24 Environmental Assessment Information Upon Government Request:

Documentation of certification activities including environmental consultant reports, Contractor documentation regarding certification decisions and contacts, and correspondence with the resource agencies.

01 31 00 Project Management and Coordination Schedule of Work (Reference 01 32 00) 01 32 00 Construction Progress Documentation Progress Schedule (PS) 01 33 00 Submittals Schedule for Submittals (SFS);

Construction Photographs; and, Record Drawings

01 39 00 Safety Accident Prevention Plan;

Material Safety Data Sheets;

OSHA Form 300 (frecordable accidents);

OSHA Citations & Reports and Contractor Written Corrective

Action; and, Excavation Protection System and Plan (if trenching required)

01 46 00 Quality Control / Quality Assurance Contractor Quality Control Plan, Certifications for Testing Personnel

01 56 00 Barricades and Signs Designation of Contractor’s Responsible Person (CRP); Traffic

Control, Barricade and Signing Plans; and, Material Certifications for Traffic Barrier 01 57 00 Temporary Erosion, Sedimentation, And

Environmental Controls Field Environmental Monitor (FEM)

Qualifications; Storm Water Pollution Prevention Plan (SWP3)

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01 59 00 Temporary Controls For Work Areas / Project-Specific Locations

Upon Government Request:

Documentation of certification activities including environmental consultant reports, Contractor documentation regarding certification decisions and contacts, and correspondence with the resource agencies;

Staging and Storage Area Plan

Layout;

Hazardous Waste Material Test

Results;

Hazardous Waste Material

Manifests; and, PSL Stormwater Pollution

Prevention Plan 01 69 00 All other specs requiring materials

Control of Materials Materials Source Identification and Certifications; and, Manufacturer’s Warranties or Guarantees

01 71 00 Field Engineering Field Engineer Resume(s);

Survey Plan;

RPLS Resume(s);

Sample of the Proposed Survey Field

Book(s);

Copy of Actual Field Data and

Calculations; and, Original Field Books

01 77 00 Contract Close-Out Record Drawings; and Final Inspection and Testing Records

02 02 00 Existing Conditions & Facilities Flood Protection Plan;

Videotape of Existing Site Conditions and Noteworthy Events Designated by the COR

31 81 00 Proof Rolling Manufacturer’s Chart for Contact

Areas /Pressures and Loadings 31 92 00 Seeding Seeding Plan

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35 41 00 Construction Of Levee Plan of Operations Testing Facilities Testing Results for Classification of

Fill Material Nuclear-Density Operator

Certification Test Results for Construction Designs and Details for Contractor

Repairs Dewatering Controls Excavation or Fill Support Details Moisture Content Adjustment Plan

50 21 00 Prime Oil Equipment / Material Certifications 50 22 00 Asphalt Antistripping Agents Material Certifications 50 23 00 Equipment for Asphalt Concrete Pavement Equipment Certifications 50 24 00 Asphalt, Oils, and Emulsions Material Certifications 50 25 00 Hot Mix Asphalt Concrete Pavement Mix Design 50 60 00 Concrete Pavement Paving and Quality Control Plan

Weather Protection Plan

60 20 00 Concrete Structures Falsework and/or Forming Plans

Transport Plan Construction Methods

60 21 00 Hydraulic Cement Concrete Plant, Admixture Certifications

60 38 00 Clean and Seal Joints Information from the sealant manufacturer showing recommended equipment and installation procedures.

60 40 00 Reinforcing Steel Material Certifications 60 41 00 Steel Structures Welding Shop Drawings

Non Conformance Reports 60 42 00 Metal For Structures Mill Test Reports, Supplemental Test

Documentation, and Certifications 60 46 00 Cleaning and Painting Steel Painting Certifications

Painting Methods Containment Plan

60 48 00 Structural Field Welding Welder Certification or Qualification 60 64 00 Reinforced Concrete Pipe Jacking, Boring Plan (if applicable)

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60 68 00 Sluice Gate Gate and Lift Mechanism Shop Drawings and Submittals

Manufacturer’s Qualifications 60 71 00 Grates and Ladders Mill Test Reports and Certifications 60 80 00 Flood Gate Manufacturer’s Product Data Sheets

Shop Drawings

2. Schedule of Assemblies, Materials, and Estimated Quantities. For this Project, the schedules of assemblies, material specifications and associated estimated quantities are identified on the Contract Drawings and Technical Specifications (Divisions 00, 01, 02, 31, 50, 60, and 90). Estimated quantities for each Bid Item are shown on the Plan Sheet identified as “Estimate of Quantities”.

EXISTING CONDITION INFORMATION

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AVAILABLE INFORMATION 00.31.19

The existing condition of the levee has been evaluated by the Government, and is included in a report entitled “Condition Assessment of US International Boundary and Water Commission, Lower Rio Grande Valley Levees, South Texas, October 2003”. The applicable sections of this report are available to the Contractor for the purposes of understanding the existing condition of the levee within the project limits of this Contract. Additionally, geotechnical investigations were performed during the final design of the project, and the associated geotechnical data and reports are identified in 00.31.32 Geotechnical Data herein.

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SURVEY INFORMATION

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AVAILABLE INFORMATION 00.31.21

For these Contract Drawings, surveying and data collection was performed as follows:

(1) Light Detection and Ranging (LiDAR) was obtained from the Government and used for preliminary information.

(2) Control was performed in April / May 2009 by RODS Surveying, Inc. who developed and provided the following (at .01-foot accuracy):

(a) Control. The surveyor established points at cross-roads to establish horizontal and vertical control; control sheets were developed for each control point set, signed and sealed by a Texas Registered Professional Land Surveyor (RPLS). The control sheet includes a drawing of the control point with a 3-point tie to existing physical features, description of the control point, X,Y & Z coordinates and the coordinate system. The Contract Drawings include the control information data for all the control points set for the project, signed and sealed by the

RPLS.

(b) Benchmarks. The surveyor established bench marks along project limits; vertical benchmarks were set at 1000-foot intervals at the right of way (ROW) line of the levee reach. A tabulation of the benchmarks is shown within the Contract Drawings.

(3) Ultimately, an aerial survey (at 0.1-foot accuracy) was performed in April / May 2009 by RODS

Surveying, Inc. and RODS Aerial Mapping, LLC who developed and provided the following, which was used as the basis of design:

(a) Field Control for Photogrammetry. The surveyor set panels for aerial photogrammetry along the levee reach for a low-level flight (1500 feet). Panels were set along the flight path at 800-foot intervals and wing panels were set at cross-roads or 2400-foot intervals. The surveyor performed a global positioning (GPS) survey to establish x-y-z coordinates of the panel points.

(b) Aerial Photogrammetry. The aerial photogrammetry was developed as follows:

1. Black and white photography at a 1-inch = 250-foot photo scale (1500 feet above ground level (AGL))

2. Data Processing. The aerial photography was scanned at 12 microns to produce 0.25-foot pixel resolution; aerial triangulation process was performed to orient individual stereo pairs.

3. Planimetric and Topographic Data Compilation. Planimetric and topographic data was compiled (suitable for 1-inch = 50-foot map scale showing 1-foot contours.

4. Digital Orthophotos. A digital elevation model (DEM) was created for the project area to support the orthophoto rectification; rectified mosaic digital images to hold 0.25-foot ground pixel resolutions suitable for a 1-inch = 50-foot map scale.

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(4) Supplemental ground surveys were performed by RODS Surveying, Inc., Dos Land Surveying, LLC, and Valley Data Collection Specialists as follows:

(a) Voids. A topographic survey was performed by the surveyors to fill-in the voids of the aerial planimetrics; additionally, the surveyor performed topographic survey on existing structures, including bridges, inlets, culverts and irrigation structures.

(b) ROW Verification. The surveyors recovered and staked ROW points from available ROW maps supplied by the Government. This ROW information is shown on the plan / profile sheets of the Contract Drawings.

(c) Geotechnical Borings Survey. The surveyors obtained x-y-x coordinates for the geotechnical borings along the levee reach spaced at approximately 500-foot spacings.

(d) Utility Survey. The surveyors coordinated with utility notification companies to get utilities marked in the field; the surveyor performed field location of underground utilities as marked by utility companies along the levee reach and intersecting streets. These locations are shown on the plan / profile sheets of the Contract Drawings. NOTE: IT IS THE CONTRACTOR’S

RESPONSIBILITY TO VERIFY LOCATIONS OF ALL EXISTING UTILITIES (SHOWN

AND NOT SHOWN ON THE CONTRACT DRAWINGS) PRIOR TO CONSTRUCTION.

ENVIRONMENTAL ASSESSMENT INFORMATION

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AVAILABLE INFORMATION 00.31.24

ENVIRONMENTAL DOCUMENT INFORMATION

(Main Floodway)

The Project’s environmental documents entitled “Final Programmatic Environmental Impact Statement, Improvements to the USIBWC Rio Grande Flood Control Projects along the Texas-Mexico Border, January 2008” and “Final Environmental Assessment, Improvements to the North and Main Floodways Levee Systems, November 2007” are available for the Contractor to review upon request.

1. Establishing and Acquisition Authorities. Various authorities include:

• Fish and Wildlife Act of 1956 [16 U.S.C. 742f (a) (4)], [16 U.S.C. 742f(b)(1)]

• An Act Authorizing the Transfer of Certain Real Property for Wildlife, or other purposes [16 U.S.C. 667b]

• Refuge Recreation Act, as amended [16 U.S.C. 460k-1], [16 U.S.C. 460k-2]

• Migratory Bird Treaty Act [16 U.S.C. 703]

• National Wildlife Refuge System Improvement Act of 1997

Abatement and Mitigation of Excessive or Unnecessary Noise. Minimize noise throughout all phases of the Contract. Exercise particular and special efforts to avoid the creation of unnecessary noise impact on adjacent noise sensitive receptors in the placement of non-mobile equipment such as air compressors, generators, pumps, etc. Place mobile and stationary equipment to cause the least disruption of normal adjacent activities.

All equipment associated with the work must be equipped with components to suppress excessive noise and these components must be maintained in their original operating condition considering normal depreciation. Noise attenuation devices installed by the manufacturer such as mufflers, engine covers, insulation, etc. must not be removed nor rendered ineffectual nor be permitted to remain off the equipment while the equipment is in use.

Preservation of Cultural and Natural Resources and the Environment. If the Contractor initiates changes to the Contract and the Government compliance-confirms the changes, the Contractor is responsible for obtaining clearances and coordinating with the appropriate regulatory agencies.

A. Cultural Resources. Cease all work immediately if a site, building, or location of historical, archeological, educational, or scientific interest is discovered within the right of way. The site, building, or location will be investigated and evaluated by the Government.

B. Texas Pollutant Discharge Elimination System (TPDES) Permits and Storm Water Pollution Prevention Plans (SWP3). The Government will file the Notice of Intent (NOI) and the Notice of Termination (NOT) for work shown on the plans in the right of way. Adhere to all requirements of the

SWP3.

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C. Work in Waters of the United States. For work in the right of way, the Government will obtain any required Section 404 permits from the U.S. Army Corps of Engineers before work begins. Adhere to all agreements, mitigation plans, and standard best management practices required by the permit. When Contractor-initiated changes in the construction method changes the impacts to waters of the U.S., obtain new or revised Section 404 permits.

D. Work in Navigable Waters of the United States. For work in the right of way, the Government will obtain any required Section 9 permits from the U.S. Coast Guard before work begins. Adhere to the stipulations of the permits and associated best management practices. When Contractor-initiated changes in the construction method changes the impacts to navigable waters of the U.S., obtain new or revised Section 9 permits.

E. Work Over the Recharge or Contributing Zone of Protected Aquifers. Make every reasonable effort to minimize the degradation of water quality resulting from impacts relating to work over the recharge or contributing zones of protected aquifers, as defined and delineated by the Texas Commission on Environmental Quality (TCEQ). Use best management practices and perform work in accordance with Contract requirements.

F. Project-Specific Locations. For all project-specific locations (PSLs) on or off the right of way (material sources, waste sites, parking areas, storage areas, field offices, staging areas, haul roads, etc.), signing the Contract certifies compliance with all applicable laws, rules, and regulations pertaining to the preservation of cultural resources, natural resources, and the environment as issued by the following or other agencies:

• Occupational Safety and Health Administration,

• Texas Commission on Environmental Quality,

• Texas Department of Transportation,

• Texas Historical Commission,

• Texas Parks and Wildlife Department,

• Texas Railroad Commission,

• U.S. Army Corps of Engineers,

• U.S. Department of Energy

• U.S. Department of Transportation,

• U.S. Environmental Protection Agency,

• U.S. Federal Emergency Management Agency, and

• U.S. Fish and Wildlife Service.

All subcontractors must also comply with applicable environmental laws, rules, regulations, and requirements in the Contract. Maintain documentation of certification activities including environmental consultant reports, Contractor documentation on certification decisions and contacts, and correspondence with the resource agencies. Provide documentation to the COR upon request.

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Obtain written compliance-confirmation from the COR for all PSLs in the right of way not specifically addressed in the plans. Prepare an SWP3 for all Contractor facilities, such as asphalt or concrete plants located within the Government right of way. Comply with all TCEQ permit requirements for portable facilities, such as concrete batch plants, rock crushers, asphalt plants, etc. Address all environmental issues, such as Section 404 permits, wetland delineation, endangered species consultation requirements, or archeological and historic site impacts. Obtain all permits and clearances in advance.

9. Other considerations. The Contractor is required to adhere to the following:

(a) No excavation event should be performed on LRGV NWR property. If during construction it is found that there is a need to perform construction on LRGV NWR property, the Contractor shall not begin construction without obtaining a Special Use Permit from the LRGV NWR or without the notification of the activity to the Refuge Manager; all federally mandated consultations and the procurement of permits will be completed by the Government, including, but not limited to, those required by the U.S. Army Corps of Engineers and the Texas State Historic Preservation Office.

(b) Vegetated areas will be clearly marked by an environmental monitor and work activities will avoid these areas.

(c) Proper training will be given to machine operators to reduce the risk of accidental mortality to less mobile terrestrial wildlife.

(d) Ensure that all Environmental Permits, Issues, and Commitments (EPIC), which are included within the Contract Drawings are followed and implemental to ensure potential impacts are avoided.

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EXISTING HAZARDOUS MATERIAL INFORMATION

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AVAILABLE INFORMATION 00.31.26

There is no available information regarding hazardous materials within / adjacent to the Project limits and/or right of way.

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GEOTECHNICAL DATA

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AVAILABLE INFORMATION 00.31.32

Geotechnical investigations were performed by Professional Services Industries, Inc., entitled:

“Geotechnical Engineering Services Report, United States Section, International Boundary & Water Commission, Lower Rio Grande Project – Interior Levees, Rehabilitation of Main Floodway, From 23rd Street to FM 1015, Hidalgo County, Texas, May 2009.”

The Contractor may request a copy of the report from the Government.

The data and report are not intended as a representation or warranty of continuity of conditions between soil borings nor of groundwater levels at dates and times other than date and time when measured. The Government will not be responsible for interpretations or conclusions drawn there from by the Contractor. Data are solely made available for the convenience of Contractor. Additional test borings and other exploratory operations may be made by Contractor subsequent to award of the Contract at no additional cost to the Government.

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PERMIT APPLICATION

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AVAILABLE INFORMATION 00.31.43

No information is available regarding required permit applications. The Contractor will be required to research the need for any required permits. For the Work under this Contract, the Contractor shall be responsible for coordinating and obtaining all permits required by Federal, state, and local entities, unless otherwise specified within the Contract Provisions and these technical specifications.

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OTHER PROJECT INFORMATION

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AVAILABLE INFORMATION 00.31.50

Control Structures

1. Existing Condition. Within the project limits of the Main Floodway levee reach there are a total of ninety-eight (98) drainage / irrigation pipe crossings. These structure locations were obtained through site investigations, as-built drawings, existing facility mapping and documentation provided by the USIBWC. In addition, a conditions assessment was prepared for each structure location during the field investigation.

The field investigation included visual confirmation that the structure exists, the type and size of the cross piping, the type of piping end treatments for both the land and floodway sides, the type and size of gatewell, size of gate well platform, a description of the gate well components such as sluice gate etc., and a description of the pump facility, if applicable. Photographs were taken for verification and documentation purposes of the gatewell, the land and floodway side end treatments, and the irrigation stand pipes if connected to the cross structure ends.

For the conditions assessment a visual inspection was performed on the condition of the exposed components associated with each structure:

• If the structure (pipe, end walls, gatewell) showed no damage such as cracking, breaking or deterioration due to weathering a condition rating of ‘good’ was assigned;

• If the structure had minor cracking and/or slight damage, and minor weathering that would not appear to compromise the integrity of the facility a condition rating of ‘fair’ was noted;

and,

• If the structure appeared to be severely damaged such as significant cracking, breaks and/or falling apart then a condition rating of ‘poor’ was assigned.

An additional field visit in conjunction with representatives of the USIBWC was made to each structure site to inspect the condition and operational ability of gatewells and gate appurtenances.

Gate components such as the gate(s), gate stem(s), gate rails, ladder, and the gate lift (hand wheel or geared crank) were assigned ratings with respect to weathering (rust, corrosion, etc.), component damage (bent stem etc.), and functional ability to still operate.

A brief summary is provided herein for each structure, describing their location, their functional purpose, and their ownership, if known. Licenses issued by the USIBWC for the use and/or ownership of these facilities by private and/or public agencies are noted if they exist. Those facilities without an issued license are under complete ownership by the USIBWC and may be abandoned or not in use.

Pictures of these structures are also included herein with an accompanying summary table that details their individual components by type and size, as well as the condition of each of these components.

2. Proposed Rehabilitation Improvements. The intent for rehabilitation of these structures under these technical specifications is to ensure that the existing control structure is functional. For these aforementioned structures, the control mechanisms will be re-furbished, to include, but not be limited to, greasing of the mechanisms, adjustment of stems, replacement of missing or broken parts, and

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 2 increasing height of existing ladders. Description of parts for the control mechanisms are included in SPECIFICATION 60 68 00; measurement and payment for this work shall be as provided by

SPECIFICATION 60 68 00.

Cleaning of the cross-drainage / irrigation structure egress and ingress, as well as the gatewell, may also be required; measurement and payment for this work shall be as provided by SPECIFICATION 60 98 00.

The following provides a description of the existing structures.

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(1) Structure No. 254L. This facility is located on the north levee of the Main Floodway between 23rd Street & 10th Street just south of McAllen, Texas. This facility is licensed to Texas Department of Transportation through license number LSF/G-1508. This structure is used to convey stormwater runoff from the land side of the levee to the floodway and it has a control gate which allows it to remain closed during floodwater events in the Main Floodway.

Figure 254L: Existing Schematic Layout of Structure 254L

Photo 254L-01: Looking at gatewell, located on floodway side

NOT TO SCALE

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Photo 254L-02: Looking at end treatment, located on floodway side

Photo 254L-03: Looking at grate inlet, located on land side

Structure Modification Summary: The existing gatewell on the floodway side will need to be raised to accommodate the re-grading of the side slopes of the levee; unable to determine working condition of gate mechanisms – drill unavailable by USIBWC.

END TREATMENT GATE WELL PUMP

STATION

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

254L 1~72-inch

RCP

4.33-foot x 9-foot

Grate Inlet Rock Riprap

12-foot x 7-foot

RCB

Sluice Gate N/A

CONDITION Unknown / Buried GOOD GOOD GOOD

Unable to Determine Working

Condition – Drill Unavailable

N/A

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(2) Structure No. 255L. This facility is located on the north levee of the Main Floodway between 23rd Street & 10th Street just south of McAllen, Texas. This facility is licensed to the City of McAllen through license number LSF/G-1732. This structure is used to convey stormwater runoff from the land side of the levee to the floodway and it has a control gate which allows it to remain closed during floodwater events in the Main Floodway.

Figure 255L: Existing Schematic Layout of Structure 255L

Photo 255L-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 7

Structure Modification Summary: The existing gatewell on the floodway side will need to be raised to accommodate the re-grading of the side slopes of the levee; unable to determine working condition of gate mechanisms – drill unavailable by USIBWC.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

255L 1~72-inch RCP Unknown Unknown 12-foot x 7-foot RCB Sluice Gate N/A

CONDITION Unknown / Buried

Unknown / Buried

Unknown / Buried GOOD

Unable to Determine Working

Condition – Drill

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 8

(3) Structure @ Sta 272+26.56. This facility is located on the north levee of the Main Floodway between 23rd Street & 10th Street just south of McAllen, Texas. This structure is used to convey water from the landside of the levee to the floodway side and it has a control gate which allows it to be used for irrigation purposes.

Figure Sta 272+26: Existing Schematic Layout of Structure Sta 272+26

Photo Sta 272+26: Aerial Photo of Structure No. 139 Location

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 9

Structure Modification Summary: No modifications are required for this structure.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

Sta 272+26.56

1~60-inch RCP Unknown Unknown None None None

CONDITION Unknown / Buried

Unknown / Buried

Unknown / Buried N/A N/A N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 10

(4) Structure No. 175A. This facility is located on the north levee of the Main Floodway between McColl Road & 10th Street just south of McAllen, Texas and is owned by the USIBWC. This structure is used to convey water from the floodway side of the levee to the land side and it has a control gate which allows it to be used for irrigation purposes.

Figure 175A: Existing Schematic Layout of Structure 175A

Photo 175A-01: Aerial Photo of Structure No. 175 Location NOT TO SCALE

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 11

Photo 175A-02: Looking at buried end treatment, located on the floodway side

Photo 175A-03: Looking at end treatment, located on land side

Structure Modification Summary: Raise headwall (extend curb) on land side; clean structure on floodway side to drain.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

175A 14-foot x 14-foot

RCB

Flared Wingwall Unknown None None None

CONDITION Unknown / Buried

Unknown/ Partially

Underwater Under Brush N/A N/A N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 12

(5) Structure No. 175. This facility is located on the north levee of the Main Floodway near South Jackson Road just south of McAllen, Texas and is owned by the USIBWC. This structure is used to convey water from the floodway side of the levee to the land side and it has a control gate which allows it to be used for irrigation purposes.

Figure 175: Existing Schematic Layout of Structure 175

Photo 175-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 13

Photo 175-02: Looking at wingwall, located on floodway side

Photo 175-03: Looking at stand pipe, located on land side

Structure Modification Summary: The existing gatewell structure will not be affected and will not require any modifications; gatewell hardware and appurtenances in working condition at time of observation, no refurbishment required; extend structure and add SET on floodway side.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

175 1~24-inch RCP Stand Pipe Straight

Wingwall 3-foot x 3-foot

RCB Sluice Gate None

CONDITION Unknown / Buried GOOD GOOD N/A N/A N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 14

(6) Structure No. 176. This facility is located on the north levee of the Main Floodway between Jackson Road & Pharr Road just southeast of McAllen, Texas and is owned by the USIBWC.

This structure is used to convey water from the floodway side of the levee to the land side and it has a control gate which allows it to be used for irrigation purposes.

Figure 176: Existing Schematic Layout of Structure 176

Photo 176-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 15

Photo 176-02: Looking at end treatment, located on floodway side

Photo 176-03: Looking at stand pipe with valve, located on land side

Structure Modification Summary: The existing gatewell will need to be raised to accommodate the re-grading of the floodway-side slope; gatewell hardware and appurtenances in working condition at time of observation, no refurbishment required; add SET on floodway side.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

176 1~24-inch RCP Stand Pipe None 4-foot x 4-foot

RCB Sluice Gate None

Buried FAIR POOR GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 16

(7) Structure No. 177. This facility is located on the north levee of the Main Floodway between Jackson Road & Pharr Road just southeast of McAllen, Texas and is owned by the USIBWC.

Figure 177: Existing Schematic Layout of Structure 177

Photo 177-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 17

Photo 177-02: Looking at stand pipe, located on floodway side

Photo 177-03: Looking at stand pipe, located on land side time of observation, no refurbishment required.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

177 1~15-inch

RCP

36-inch Stand Pipe Stand Pipe 4-foot x 4-foot

RCB Sluice Gate None

Buried GOOD GOOD GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 18

(8) Structure No. 178. This facility is located on the north levee of the Main Floodway between Jackson Road & Pharr Road just southeast of McAllen, Texas and is owned by the USIBWC.

Figure 178: Existing Schematic Layout of Structure 178

Photo 178-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 19

Photo 178-02: Looking at wingwall, located on floodway side

Photo 178-03: Looking at wingwall, located on land side time of observation, no refurbishment required; extend RCP and add SET on land side.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

178 1~18-inch

RCP

Flared Wingwall

Flared Wingwall

4-foot x 4-foot RCB Sluice Gate None

Buried GOOD FAIR GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 20

(9) Structure No. 178L. This facility is located on the north levee of the Main Floodway between Jackson Road & Pharr Road just south of Pharr, Texas. This facility is licensed to Hidalgo County Drainage District No. 1 through license number LSF/G-1435. This structure is used to convey storm water runoff from the land side of the levee to the floodway and it has a control

Figure 178L: Existing Schematic Layout of Structure 178L

Photo 178L-01: Looking at pump station, located on land side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 21

Photo 178L-02: Looking at wingwall, located on floodway side

Photo 178L-03: Looking at wingwall, located on land side

Structure Modification Summary: No modifications required.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

178L 2~

7-foot x 7-foot

RCB

Straight Wingwall

Flared Wingwall None N/A Pump Station

Buried FAIR GOOD N/A N/A GOOD

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 22

(10) Structure BTWN178L&179L. This facility is located on the north levee of the Main Floodway between Jackson Road & Pharr Road just south of Pharr, Texas. This facility is owned by the USIBWC. This structure is used to convey stormwater runoff from the land side of the levee to the floodway and it has a control gate which allows it to remain closed during floodwater events in the Main Floodway.

Figure BTWN178L&179L: Existing Schematic Layout of Structure 178L & 179L

Photo BTWN178L&179L-01: Looking at pump station, located on land side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 23

(11) Structure No. 179L. This facility is located on the north levee of the Main Floodway between Jackson Road & Pharr Road just south of Pharr, Texas. This facility is licensed to

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 24

Hidalgo County Drainage District No. 1 through license number LSF/G-1080. This structure is used to convey stormwater runoff from the land side of the levee to the floodway and it has a control gate which allows it to remain closed during floodwater events in the Main Floodway.

Figure 179L: Existing Schematic Layout of Structure 179L

Photo 178L-01: Looking at gatewell, located on lan floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 25

Photo 179L-02: Looking at riprap, located on floodway side

Photo 179L-03: Looking at riprap, located on land side

Structure Modification Summary: No modifications required.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

179L 1~ 72inch and

2~ 48-inch

RCP

Concrete Riprap

Concrete Riprap

13.5-foot x 7-foot

RCB

Sluice Gate Pump Station

Buired GOOD GOOD GOOD GOOD GOOD

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 26

(12) Structure No. 180. This facility is located on the north levee of the Main Floodway between Jackson Road & Pharr Road just south of Pharr, Texas and is owned by the USIBWC. This structure is used to convey water from the floodway side of the levee to the land side and it has a control gate which allows it to be used for irrigation purposes.

Figure 180: Existing Schematic Layout of Structure 180

Photo 180-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 27

Photo 180-02: Looking at pipe, located on floodway side time of observation, no refurbishment required; remove / replace broken RCP and add SET on floodway side.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

180 1~18-inch RCP Unknown None 4-foot x 4-foot

RCB Sluice Gate None

CONDITION Unknown / Buried

Unable to Access POOR GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 28

(13) Structure No. 181. This facility is located on the north levee of the Main Floodway near Pharr Road just south of Pharr, Texas and is owned by the USIBWC. This structure is used to convey storm water runoff from the land side of the levee to the floodway and it has a control gate which allows it to remain closed during floodwater events in the Main

Figure 181: Existing Schematic Layout of Structure 181

Photo 181-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 29

Photo 181-02: Looking at flared wingwall, located on floodway side

Photo 181-03: Looking at flared wingwall, located on land side time of observation, no refurbishment required; clean structure on floodway side and land side to drain.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

181 1~24-inch

RCP

Flared Wingwall

Flared Wingwall

4-foot x 4-foot RCB Sluice Gate N/A

CONDITION GOOD GOOD GOOD GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 30

(14) Structure No. 182. This facility is located on the north levee of the Main Floodway near Pharr Road just south of Pharr, Texas and is owned by the USIBWC. This structure is used to convey water from the floodway side of the levee to the land side and it has a control gate which allows it to be used for irrigation purposes.

Figure 182: Existing Schematic Layout of Structure 182

Photo 182-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 31

Photo 182-01: Aerial Photo of Structure No. 182 Location

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

182 1~18-inch RCP Unknown Unknown 4-foot x 4-foot

RCB Sluice Gate None

CONDITION Unknown / Buried

Unknown / Buried

Buried GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 32

(15) Structure No. 80. This facility is located on the north levee of the Main Floodway between Pharr Road & I Road just south of Pharr, Texas and is owned by the USIBWC. This structure is used to convey storm water runoff from the land side of the levee to the floodway and it has a control gate which allows it to remain closed during floodwater events in the Main Floodway.

Figure 80: Existing Schematic Layout of Structure 80

Photo 80-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 33

Photo 80-02: Looking at straight wingwall, located on floodway side

Photo 80-03: Looking at covered wingwall, located on land side

Structure Modification Summary: No structure modifications required; gatewell hardware and appurtenances in working condition at time of observation, no refurbishment required; clean structure on land side and floodway side to drain.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

80 1~24-inch RCP Wingwall Straight

Wingwall 4-foot x 4-foot

RCB Sluice Gate None

CONDITION Unknown / Buried

Buried GOOD GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 34

(16) Structure No. 82. This facility is located on the north levee of the Main Floodway between Pharr Road & I Road just south of Pharr, Texas and is owned by the USIBWC. This structure is used to convey stormwater runoff from the land side of the levee to the floodway

Figure 82: Existing Schematic Layout of Structure 82

Photo 82-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 35

Photo 82-02: Looking at flared wingwall, located on floodway side

Photo 82-03: Looking at straight wingwall, located on land side

Structure Modification Summary: The existing gatewell will need to be raised / platform extended to accommodate the re-grading of the floodway-side slope; gatewell hardware and appurtenances in working condition at time of observation, no refurbishment required; remove / replace SET on land side.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

82 1~30-inch

RCP

Straight Wingwall

Flared Wingwall

5-foot x 4-foot RCB w/ Platform

Sluice Gate None

Buried POOR GOOD GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 36

(17) Structure No. 83L. This facility is located on the north levee of the Main Floodway between I Road & Stewart Road just southeast of Pharr, Texas. This facility is licensed to Hidalgo County Water Improvement District #2 through license number LSF/G-467. This

Figure 83L: Existing Schematic Layout of Structure 83L

Photo 83L-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 37

Photo 83L-02: Looking at covered wingwall, located on floodway side

Photo 83L-03: Looking at stand pipe, located on land side working condition at time of observation, no refurbishment required; remove / replace SET on land side; clean structure on floodway side to drain.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

83L 1~18-inch RCP Stand Pipe Wingwall 4-foot x 4-foot

RCB Sluice Gate None

CONDITION Unknown / Buried GOOD Unknown /

Buried GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 38

(18) Structure No. 84. This facility is located on the north levee of the Main Floodway between I Road & Stewart Road just southeast of Pharr, Texas and is owned by the USIBWC. This structure is used to convey storm water runoff from the land side of the levee to the floodway

Figure 84: Existing Schematic Layout of Structure 84

Photo 84-01: Looking at gatewell, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 39

Photo 84-02: Looking at flared wingwall, located on floodway side

Photo 84-03: Looking at flared wingwall, located on land side working condition at time of observation, no refurbishment required.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

4-foot x 4-foot

RCB

Flared

Wingwall Flared

Wingwall

6-foot x 5-foot RCB w/ Platform

Sluice Gate None

CONDITION Unknown / Buried

GOOD GOOD GOOD GOOD N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 40

(19) Structure No. 84L. This facility is located on the north levee of the Main Floodway between I Road & Stewart Road just southeast of Pharr, Texas. This facility is licensed to Hidalgo County through license number LSF/G-730. This structure is used to convey stormwater runoff from the land side of the levee to the floodway and it has a control gate which allows it to remain closed during floodwater events in the Main Floodway.

Figure 84L: Existing Schematic Layout of Structure 84L

Photo 84L-01: Looking at 2~ 6-foot x 6-foot RCB, located on floodway side

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 41

Photo 84L-02: Looking at flared wingwall, located on floodway side

Photo 84L-03: Looking at flared wingwall, located on land side

Structure Modification Summary: No structure modifications required.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

84L 2~

6-foot x 6-foot

RCB

Flared Wingwall

Flared Wingwall

17-foot x 8.5-foot

RCB

Sluice Gate N/A

CONDITION Unknown / Buried

GOOD GOOD GOOD

Unable to Determine Working

Condition – Drill

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50 - 42

(20) Structure No. 85L. This facility is located on the north levee of the Main Floodway near Stewart Road just southeast of Pharr, Texas. This facility is licensed to Hidalgo County Drainage District No. 1 through license number LSF/G-1599. This structure is used to convey stormwater runoff from the land side of the levee to the floodway and it has a control gate which allows it to remain closed during floodwater events in the Main Floodway.

Structure was unable to be located in the field; the next page shows figure of as-built drawing.

Figure 85L-01: Existing Schematic Layout of Structure 85L

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

FLOODWAY

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

85L 1~5’ X 5’ RCB Stand Pipe Stand Pipe None None None

CONDITION Unknown / Buired

Unknown / Unable to Locate

Unknown / Unable to

Locate N/A N/A N/A

USIBWC Contract No.: USIBWC Contract No.: IBM09B0005 Page 00.31.50…