Div00.pdf

11-18-2009

TECHNICAL SPECIFICATIONS

LOWER RIO GRANDE FLOOD CONTROL PROJECT

Rehabilitation of Lateral A to Donna Pump Levee and Retamal Dike Reach

Hidalgo County, Texas

Prepared for:

United States Section, International Boundary & Water Commission

Prepared by:

Texas Firm No. 1582

Project Manager: Daniel O. Rios, PE Deputy Project Manager: Sharlotte L. Teague, PE Senior Project Manager: Phillip J. Pawelek, PE

In Cooperation With:

Raba-Kistner Consultants, Inc.

Contract No. IBM05D0001 Task Order Nos. IBM09T0026

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Lower Rio Grande Flood Control Project

DIVISION 00-

USIBWC Contract No.: IBM09B0009 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.: IBM09B0009 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

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TABLE OF CONTENTS

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INTRODUCTORY INFORMATION 00.01.10

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

SPECIFICATION 31 11 00 PREPARING RIGHT OF WAY

STANDARD DIVISIONS

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SPECIFICATION 31 12 00 OBLITERATE EXISTING ROAD

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

SPECIFICATION 35 42 00 WATERWAY BANK PROTECTION

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 40 00 METAL BEAM GUARD FENCE

SPECIFICATION 50 60 00 CONCRETE PAVEMENT

DIVISION 60 - STRUCTURES

SPECIFICATION 60 02 00 TRENCH EXCAVATION PROTECTION

SPECIFICATION 60 10 00 EXCAVATION AND BACKFILL FOR STRUCTURES

SPECIFICATION 60 20 00 CONCRETE STRUCTURES

SPECIFICATION 60 21 00 HYDRAULIC CEMENT

SPECIFICATION 60 23 00 FLOODWALL

SPECIFICATION 60 24 00 PRECAST CONCRETE STRUCTURES (FABRICATION)

SPECIFICATION 60 25 00 PRECAST PRESTRESSED CONCRETE STRUCTURAL

MEMBERS

SPECIFICATION 60 26 00 PRESTRESSING

SPECIFICATION 60 27 00 SURFACE FINISHES FOR CONCRETE

SPECIFICATION 60 34 00 ROADWAY APPROACH SLABS

SPECIFICATION 60 38 00 CLEAN / 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 58 00 WATERPROOFING MEMBRANES FOR STRUCTURES

SPECIFICATION 60 63 00 CONCRETE BOX CULVERTS AND STORM DRAINS

SPECIFICATION 60 64 00 REINFORCED CONCRETE PIPE

SPECIFICATION 60 65 00 MANHOLES AND INLETS

SPECIFICATION 60 66 00 HEADWALLS AND WINGWALLS

SPECIAL DIVISIONS

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SPECIFICATION 60 67 00 SLOPE END – SAFETY END TREATMENT

SPECIFICATION 60 68 00 SLUICE GATES

SPECIFICATION 60 69 00 FABRICATED SLIDE GATES (STAINLESS STEEL)

SPECIFICATION 60 71 00 GRATES AND LADDERS

SPECIFICATION 60 79 00 ABANDON AND PLUG STRUCTURE

SPECIFICATION 60 80 00 FLOODGATES

SPECIFICATION 60 96 00 REMOVING EXISTING STRUCTURES

SPECIFICATION 60 98 00 CLEAN EXISTING STRUCTURES

DIVISION 90 - MISCELLANEOUS

SPECIFICATION 90 10 00 POST AND CABLE FENCE

SPECIFICATION 90 79 00 HEAVY DUTY VEHICULAR GATE

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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, Lateral A to Donna Pump Levee and Retamal Dike Reach.” An index of drawings is identified on the title sheet, and includes the following:

INDEX OF SHEETS

SHEET NO. DESCRIPTION

01.01 TITLE SHEET

02.01-02.04 PROJECT LAYOUT

02.05-02.14 SURVEY CONTROL SHEETS

03.01 GENERAL NOTES & SPECIFICATION DATA

04.01 ESTIMATE OF QUANTITIES

05.01 SUMMARY OF LEVEE

05.02 OMITTED

05.03 SUMMARY OF ACCESS ROADS

05.04 SUMMARY OF SMALL STRUCTURES

06.01-06.02 EXISTING TYPICAL SECTIONS LATERAL “A”

06.03-06.08 PROPOSED TYPICAL SECTIONS LATERAL “A”

07.01-07.08 ALIGNMENT DATA SHEET

08.01-08.51 PLAN & PROFILE LATERAL “A”

08.52-08.65 PLAN & PROFILE RETAMAL DIKE

08.66-08.132 LATERAL “A” - PROPOSED CROSS SECTIONS

09.01-09.211 RETAMAL DIKE - PROPOSED CROSS SECTIONS

10.01-10.24 BORE LOGS

11 OMITTED

12.01-12.05 STRUCTURE LAYOUTS

12.06-12.08 OMITTED

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12.09 OMITTED

12.10-12.15 CULVERT LAYOUTS

12.16-12.18 OMITTED

12.19-12.51 CULVERT LAYOUTS

12.52 FLOODWALL PLAN & PROFILE

12.53 FLOODWALL DETAIL

12.54-12.55 GATEWELL ADJUSTMENT DETAILS

13.01 SW3P

14.01 EPIC

15.01 HEAVY DUTY VEHICULAR GATE

15.02 TRAFFIC CONTROL DETAILS TYPE III

15.03-15.14 BARRICADES AND LANE CLOSURES BC-07

15.15-15.17

TEMPORARY EROSION SEDIMENT AND WATER POLLUTION

CONTROL MEASURES

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, 33, 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, 33, 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-z 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

The Project’s environmental assessment entitled “Final Environmental Assessment, Flood Control Improvements for the Lateral A / Retamal Dike Levee System, March 2007” is available for Contractor review upon request of the Contractor. The project is located adjacent to the Lower Rio Grande Valley National Wildlife Refuge (LRGV NWR), Pate Bend (352, 352A, 354B, & 354C) and Hidalgo Bend (354A, 354II, & 354) Tracts. Additional information is as follows:

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 USC 703]

• National Wildlife Refuge System Improvement Act of 1997

2. Refuge Purpose(s). As excerpted from the enabling legislation used to authorize the acquisition of the Refuge, the following are the Refuge purposes:

“... for the development, advancement, management, conservation, and protection of fish and wildlife resources...” [16 U.S.C. 742f(a)(4)] “... for the benefit of the United States Fish and Wildlife Service, in performing its activities and services. Such acceptance may be subject to the terms of any restrictive or affirmative covenant, or condition of servitude...” [16 U.S.C. 742f(b)(1)] (Fish and Wildlife Act of 1956)

”... particular value in carrying out the national migratory bird management program.” [16 U.S.C. 667b] (An Act Authorizing the Transfer of Certain Real Property for Wildlife, or other purposes)

”... suitable for: (1) incidental fish and wildlife-oriented recreational development, (2) the protection of natural resources, (3) the conservation of endangered species or threatened species...” [16 U.S.C. 460k- 1] “... the Secretary ... may accept and use ... real ... property. Such acceptance may be accomplished under the terms and conditions of restrictive covenants imposed by donors...” [16 U.S.C. 460k-2] (Refuge Recreation Act [16 U.S.C. 460k-460k-4], as amended)

”... for use as an inviolate sanctuary, or for any other management purpose, for migratory birds.” [16 U.S.C. 715d] (Migratory Bird Treaty Act, 16 USC 703)

3. Refuge Goals. The Lower Rio Grande Valley and Santa Ana National Wildlife Refuges Comprehensive Conservation Plan (CCP) of 1997 satisfies the CCP requirement of the National Wildlife Refuge System Improvement Act of 1997 and identifies the following five goals of the Lower Rio Grande Valley National Wildlife Refuge:

• To restore, enhance and protect biological diversity.

• To protect and obtain additional water rights, improve water management, and protect, restore and enhance wetlands.

ENVIRONMENTAL ASSESSMENT INFORMATION

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• To improve water quality and reduce contaminant related fish and wildlife resource losses.

• To protect, maintain and plan for cultural resources.

• To offer compatible wildlife dependent public uses, recreational opportunities, and interpretation and education.

4. National Wildlife Refuge System Mission. “The Mission of the National Wildlife Refuge System is to administer a national network of lands and waters for the conservation, management, and where appropriate, restoration of the fish, wildlife, and plant resources and their habitats within the United States for the benefit of present and future generations of Americans.”

5. Description of Use. It is anticipated that no use of LRGV NWR property will be required for the construction of the Project.

6. Availability of LRGV NWR Resources. It is anticipated that no use of LRGV NWR resources will be required for the construction of the Project.

7. Anticipated Impacts of the Use. It is anticipated that no use of LRGV NWR property will be required for the construction of the Project.

8. Public Review and Comment. It is anticipated that no use of LRGV NWR property or resources will be required for the construction of the Project; therefore, no public review or comment period will be required.

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) While work is being conducted, vehicles and equipment will be monitored continuously to insure that fuels, oils and fluids do not leak or are spilled onto the ground. In the event of a spill or leak, the Refuge Manager will be immediately notified, all work activities will be suspended until the spillage or leakage is stopped and appropriate clean-up measures are employed to capture contaminants and remove contaminated soils.

(e) All other stipulations and/or rules from “General Conditions and Operating Procedures While on the Lower Rio Grande Valley National Wildlife Refuge” will be strictly adhered to.

EXISTING HAZARDOUS MATERIAL INFORMATION

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AVAILABLE INFORMATION 00.31.26

There is potential hazardous materials within / adjacent to the Project limits and/or right of way near the Donna Pump area of the project; please note exception reference on plan sheet nos. 08.49 thru 08.52.

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GEOTECHNICAL DATA

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AVAILABLE INFORMATION 00.31.32

Geotechnical investigations for this project included the following:

“Geotechnical Exploration and Engineering Evaluation of Levee System for Lateral A to Donna Pump to Retamal Dam, Lower Rio Grande Flood Control Project, Technical Memorandum,” July 31, 2009, Raba- Kistner Consultants, Inc.

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 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 levee reaches under this Contract, there exists a total of forty-three (43) drainage and/or 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

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 2 to, greasing of the mechanisms, adjustment of stems, replacement of missing or broken parts, and 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 pages provide a description of the existing structures and a summary of proposed improvements.

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Photo 003: Aerial Photo Location – Retamal Diversion Dam

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(1) Structure at Carlson Basin @ Sta 1175+00.00. This facility is located adjacent to an elevated canal on the river side of the Rio Grande levee known as Lateral A. This structure is near McColl Road, south of McAllen, Texas and is operated by, and licensed to, the HCID#2 through license number LSF/G-749. This structure is used to convey irrigation water.

Figure @ Sta 1175+00.00: Existing Schematic Layout of Structure @ Sta 1175+00.00

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Structure Modification Summary: A new levee is to be built across the Carlson Basin, and it will include the installation of 4-10’X10’ Box Culverts, and 4-10’X10 Stainless Steel Slide Gates upstream of the culverts to control flow.

END TREATMENT GATEWELL PUMP

STATION

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

@ Sta 1175+00.00

1~20-inch

RCP

Headwall w/ Lateral Gate Standpipe None None None

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

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 6

(2) Structure BTWN250E&250D. This facility is located adjacent to an elevated canal on the river side of the Rio Grande levee known as Lateral A. This structure is near McColl Road, south of McAllen, Texas and is operated by, and licensed to, the HCID2 through license number LSF/G-749. This structure is used to convey irrigation water.

Figure 250E&250D: Existing Schematic Layout of Structure Btwn250E&250D

Photo 250E&250D-01: Looking at standpipe, located on river side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 7

Structure Modification Summary: The existing pipe structure will not be affected and will not require any modifications.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

BTWN

250E&250D

1~20-inch

RCP

Headwall w/ Lateral Gate Standpipe None None None

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 8

(3) Structure No. 250D. This facility is located between the elevated canal and the north slope of the levee on the land side of the Rio Grande levee known as Lateral A. This structure is between McColl Road and Jackson Road; south of Pharr, Texas and is operated by the irrigation district.

This structure is used to convey irrigation water.

Figure 250D: Existing Schematic Layout of Structure 250D

Photo 250D-01: Looking at standpipe, located on land side

STA 1230+71.78

X= 1,075,063.86 Y= 16,558,245.86

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 9

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

250D 1~18-inch

RCP

Headwall w/ Lateral Gate None None None None

Underwater GOOD N/A N/A N/A N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 10

(4) Structure BTWN250D&250C. This facility is located between the elevated canal and the north slope of the levee on the land side of the Rio Grande levee known as Lateral A. This structure is near Jackson Road, south of Pharr, Texas and is operated by the Hidalgo County Irrigation District No. 2. This structure is used to convey irrigation water.

Figure 250D&250C: Existing Schematic Layout of Structure Btwn250D&250C

Photo 250D&250C-01: Looking at lateral gate, located on land side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 11

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

BTWN

250D&250C Unknown Lateral Gate None None None None

Underwater GOOD N/A N/A N/A N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 12

(5) Structure No. 250CL. This facility is located between an elevated canal and the north slope of the levee on the land side of the Rio Grande levee known as Lateral A. This structure is between Jackson Road and Pharr Road; south of Pharr, Texas and is operated by the irrigation district.

This structure is used to convey irrigation water. This structure is owned by Ed. G. Velda, License No. G-7-102.

Figure 250CL: Existing Schematic Layout of Structure 250CL

Photo 250CL-01: Looking at standpipe, located on land side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 13

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

250CL 1~14-inch

RCP

Headwall w/ Lateral Gate & Standpipe

Valve None None None

Underwater GOOD GOOD N/A N/A N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 14

(6) Structure No. 250 This facility is located between an elevated canal and the north slope of the levee on the land side of the Rio Grande levee known as Lateral A. This structure is between Jackson Road and Pharr Road; south of Pharr, Texas and is operated by the irrigation district.

This structure is used to convey irrigation water.

Figure 250: Existing Schematic Layout of Structure 250

Photo 250-01: Looking at stand pipe, located on river side

EXIST 18” PVC PIPE

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 15

Photo 250-02: Looking at headwall with lateral gate, located on land side

Structure Modification Summary: The existing PVC standpipe will be removed, replaced/relocated; extend 18-inch RCP and install SET on river side.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

250 1~18-inch

RCP

Headwall w/ Lateral Gate

PVC

Standpipe None None None

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 16

(7) Structure BTWN250&249. This facility is located adjacent to an elevated canal on the land side of the Rio Grande levee known as Lateral A. This structure is between Pharr Road and I Road; south of Pharr, Texas and is operated and licensed to Jack Barnes through license number LSF/G-1059. This structure is used to convey irrigation water.

Figure 250&249: Existing Schematic Layout of Structure Btwn250&249

Photo 250&249-01: Looking at standpipe; located on land side

STA 1320+74.24

X= 1,083,826.00 Y= 16,556,505.88

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 17

Structure Modification Summary: The existing pipe structure will need to be cleaned on river side to drain.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

BTWN

250&249

1~24-inch

RCP

Headwall w/ Lateral Gate & Standpipe

Pipe End None None None

CONDITION Unknown / Underwater GOOD HEAVY

BRUSH N/A N/A N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 18

(8) Structure No. 249. This facility is located between the elevated canal and the north slope of the levee on the land side of the Rio Grande levee known as Lateral A. This structure is between Pharr Road and I Road; south of Pharr, Texas and is operated by irrigation district. This structure is used to convey irrigation water.

Figure 249: Existing Schematic Layout of Structure 249

Photo 249-01: Looking at head wall and lateral gate, located on land side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 19

Photo 249-02: Looking at standpipe, located on river side

Structure Modification Summary: The existing structure will need to be modified to accommodate raising of levee; remove and replace/relocate existing standpipe, extend 12-inch RCP and install SET on river side.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

249 1~12-inch

RCP

Headwall w/ Lateral Gate & Standpipe

Standpipe None None None

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 20

(9) Structure No. 248A. This facility is located between the elevated canal and the north slope of the levee on the land side of the Rio Grande levee known as Lateral A. This structure is between Pharr Road and I Road; south of Pharr, Texas and is operated by the irrigation district. This structure is used to convey irrigation water.

Figure 248A: Existing Schematic Layout of Structure 248A

Photo 248A-01: Looking at headwall with lateral gate, located on land side

STA 1338+25.65

X= 1,085,565.93 Y= 16,556,694.31

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 21

Photo 248A-02: Looking at stand pipe, located on land side

Photo 248A-03: Looking at stand pipe, located on river side the raising of the levee; remove and replace/relocate standpipe, extend 12-inch RCP and install SET on river side.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

248A 1~12-inch

RCP

Headwall w/ Lateral Gate & Standpipe

Standpipe None None None

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 22

(10) Structure No. 248. This facility is located between the elevated canal and the north slope of the levee on the land side of the Rio Grande levee known as Lateral A. This structure is near I Road; south of Pharr, Texas and is operated by the irrigation district. This structure is used to convey irrigation water.

Figure 248: Existing Schematic Layout of Structure 248

Photo 248-01: Looking at head wall with lateral gate and stand pipe, located on land side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 23

Photo 248-02: Looking at stand pipe, located on river side the raising of the levee; adjust / raise height of existing standpipe on river side.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

248 1~18-inch

RCP

Headwall w/ Lateral Gate & Standpipe

Standpipe None None None

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 24

(11) Structure No. 247A. These facilities are located on the landside and between the elevated canal and the levee’s north slope on the land side of the Rio Grande levee known as Lateral A. These structures are between I Road and San Juan Road; south of San Juan, Texas and is operated by the irrigation district. This facility is used to convey irrigation water.

Figure 247A: Existing Schematic Layout of Structure 247A

Photo 247A-01: Looking at headwall with lateral gate and stand pipes, located on land side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 25 require any modifications. Clean structure on floodside.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

247A 1~18-inch

RCP

Headwall w/ Lateral Gate & Standpipe

Headwall None None None

CONDITION Unknown / Underwater GOOD

Unknown / Unable to

Locate N/A N/A N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 26

(12) Structure No. 244. This facility crosses the Rio Grande levee known as Lateral A. This structure is between San Juan Road and Stewart Road; south of San Juan, Texas and is operated by the irrigation district. This structure is used to convey irrigation water.

Figure 244: Existing Schematic Layout of Structure 244

Photo 244-01: Looking at head wall with lateral gate, located on land side

STA 1423+15.06

X= 1,093,251.19 Y= 16,555,510.93

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 27 require any modifications. Clean structure on floodside.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

244 1~18-inch

RCP

Headwall w/ Lateral Gate Unknown None None None

CONDITION Unknown / Underwater Underwater Unable to

Locate N/A N/A N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 28

(13) Structure No. 242AL. This facility is located on the river side of the Rio Grande levee known as Lateral A. This structure is between Cesar Chavez Road and Tower Road; south of Alamo, Texas and is owned by IBWC and licensed to US Fish and Wildlife Services (USFWS) through license number LSF/G-966. This structure is used to convey irrigation water, and it has a control gate.

Figure 242AL: Existing Schematic Layout of Structure 242AL

Photo 242AL-01: Looking at head wall with lateral gate, located on land side

STA 1512+91.12

X= 1,102,123.10 Y= 16,555,578.08

EXIST 24” RCP

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 29

Photo 242AL-02: Looking at stand pipe, located on river side.

Photo 242AL-03: Looking at gatewell, located on river side require any modifications; the gatewell structure will need to be adjusted to accommodate rising of levee; gatewell hardware and appurtenances in working condition at time of observation.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

242AL 1~24-inch

RCP

Headwall w/ Lateral Gate Standpipe 4-foot x 4-foot

RCB Sluice Gate None

Underwater GOOD GOOD GOOD GOOD N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 30

(14) Structure No. 242. This facility with a canal overflow and standpipe facilities are located between the elevated canal and the levee’s north slope and on the land side of the Rio Grande levee known as Lateral A. This facility is near Tower Road; south of Alamo, Texas and is operated by the irrigation district. Originally licensed to Frank Schuster through license number

LSF/G-1619.

Figure 242: Existing Schematic Layout of Structure 242

Photo 242-01: Looking at headwall with overflow basin and lateral gate, located on land side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 31

Photo 242-02: Looking at stand pipe, located on river side

Structure Modification Summary: The existing pipe structure will need to be cleaned on river side to drain; the existing gatewell structure will not be affected and will not require any modifications.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

Overflow with

1~18-inch

RCP

Headwall w/ Overflow Basin &

Lateral Gate

Pipe End Overflow Basin Gate None None

Underwater GOOD Buried GOOD N/A N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 32

(15) Structure No. 242L. This facility is located on the land side of the Rio Grande levee known as

Lateral A. This structure is between Tower Road and Border Road southeast of Alamo, Texas and is operated by the irrigation district. It was originally licensed to Frank Schuster through license number LSF/G-146. This structure is used to convey irrigation water.

Figure 242L: Existing Schematic Layout of Structure 242L

Photo 242L-01: Looking at stand pipe, located on land side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 33

Photo 242L-02: Looking at pipe, located on river side

Photo 242L-03: Looking at abandoned gatewell, located on river side

Structure Modification Summary: No modifications required.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

242L 1~24-inch

RCP

Vent, Valve, and Standpipe Pipe Abandoned None None

Underwater GOOD Buried N/A N/A N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 34

(16) Structure No. 241AL. This facility crosses the Rio Grande levee known as Lateral A. This structure is between Border Road and Valley View Road; southwest of Donna, Texas and is operated by the irrigation district and was originally licensed to Fred Krenmueller through license number LSF/G-135. This structure is used to convey irrigation water.

Figure 241AL: Existing Schematic Layout of Structure 241AL

Photo 241AL-01: Looking at projecting pipe, located on land side

STA 1627+63.21

X= 1,112,520.86 Y= 16,552,045.74

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 35

Photo 241AL-02: Looking at stand pipe, located on river side

Photo 241AL-03: Looking at sluice gate, located on river side the raising of the levee; clean existing structure on land side to drain, install SET on land side; extend 24-inch RCP and reinstall gate on river side; salvage and reinstall gate.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

241AL 1~24-inch RCP Pipe Gated Pipe N/A N/A Yes

Underwater FAIR FAIR N/A N/A FAIR

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 36

(17) Structure No. 241L. This facility crosses the Rio Grande levee known as Lateral A. This operated by the irrigation district and was originally licensed to Fred Krenmueller through license number LSF/G-135. This structure is used to convey water from a pump station and river side elevated canal to the concrete lined ditch along the north side of the levee.

Figure 241L: Existing Schematic Layout of Structure 241L

Photo 241L-01: Looking at head wall, located on land side

STA 1642+47.18

X= 1,113,857.59 Y= 16,551,435.05

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 37

Photo 241L-02: Looking at head wall under water, located on river side

Photo 241L-03: Looking at gatewell, located on river side

Structure Modification Summary: The existing gatewell will be raised and platform extended to accommodate the raising of levee.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

241L 1~30-inch

RCP

Headwall in Concrete-

Lined Ditch

Headwall in Elevated

Canal

4-foot x 4-foot RCB Sluice Gate None

CONDITION Unknown / Underwater

Unknown / Underwater

Unknown / Underwater GOOD

Unable to Determine Working

Condition – Drill Unavailable

N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 38

(18) Structure No. 241. This facility crosses the Rio Grande levee known as Lateral A. This operated by the irrigation district and was originally licensed to Fred Krenmueller through license number LSF/G-135. This structure is used to convey water from a pump station and river side elevated canal to the concrete lined ditch along the north side of the levee.

Figure 241: Existing Schematic Layout of Structure 241

Photo 241-01: Looking at head wall with gatewell, located on land side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 39

Photo 241-02: Looking at gatewell, located on land side the raising of the levee; the existing pipe structure will need to be cleaned to drain on river side; the existing gatewell structure will need to be raised, install new grate and sluice gate hardware.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

241 1~24-inch

RCP

Headwall & Gatewell Headwall 4-foot x 4-foot

RCB Sluice Gate None

CONDITION Unknown / Buried GOOD Unknown /

Underwater Broken Grate

Hardware Missing N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 40

(19) Structure No. 240. This facility is located on the river side of the Rio Grande levee known as

Lateral A. This structure is between Border Road and Valley View Road; southwest of Donna, Texas and is operated by the irrigation district. This structure is used to convey irrigation water.

Figure 240: Existing Schematic Layout of Structure 240

Photo 240-01: Looking at buried straight wingwall, located on river side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 41

Photo 240-02: Looking at gatewell, located on river side

Structure Modification Summary: The existing gatewell structure will need to be raised / platform extended to accommodate the raising of the levee; gatewell hardware and appurtenances in working condition at time of observation; clean pipe structure on both ends; remove existing headwall and extend 18” RCP and add a SET on riverside.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

240 1~18-inch RCP Valve & Pipe Straight

Wingwall 4-foot x 4-foot

RCB Sluice Gate None

Buried Buried FAIR GOOD GOOD N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 42

(20) Structure No. 239. This facility is located on the river side of the Rio Grande levee known as

Texas and is operated by the irrigation district. This structure is used to convey irrigation water.

Figure 239: Existing Schematic Layout of Structure 239

Photo 239-01: Looking at buried straight wingwall, located on river side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 43

Photo 239-02: Looking at gatewell, located on river side extended to accommodate the raising of the levee; gatewell hardware and appurtenances in working condition at time of observation; clean pipe structure on both sides; replace SET on river side. Remove existing headwall and extend 18” RCP on riverside.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

239 1~18-inch RCP Pipe End Straight

Wingwall 4-foot x 4-foot

RCB Sluice Gate None

CONDITION Unknown / Underwater

Unknown / Buried GOOD GOOD GOOD N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 44

(21) Structure No. 238. This facility is located on the river side of the Rio Grande levee known as

Texas and is operated by the irrigation district. This structure is used to convey irrigation water

Figure 238: Existing Schematic Layout of Structure 238

Photo 238-01: Looking at straight wingwall, located on river side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 45

Photo 238-02: Looking at gatewell, located on river side extended to accommodate the raising of the levee; gatewell hardware & appurtenances in working condition at time of observation; clean structure on both ends; replace SET on river side. Extend 18” RCP on riverside.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

238 1~18-inch RCP Headwall Straight

Wingwall 4-foot x 4-foot

RCB Sluice Gate None

CONDITION Unknown / Underwater

Buried FAIR GOOD GOOD N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 46

(22) Structure No. 237. This facility is located on the river side of the Rio Grande levee known as

Lateral A. This structure is near Valley View Road south of Donna, Texas and is operated by the irrigation district. This structure is used to convey irrigation water.

Figure 237: Existing Schematic Layout of Structure 237

Photo 237-01: Looking at buried head wall, located on river side

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 47

Photo 237-02: Looking at gatewell, located on river side

Structure Modification Summary: The existing gatewell structure will need to be abandoned / plugged and replaced / relocated and extend platform to accommodate raising of levee; gatewell hardware & appurtenances in working condition at time of observation. Clean existing structure on riverside. Remove and replace 18” RCP on riverside.

STRUCTURE

NUMBER

TYPE

AND SIZE

LAND

SIDE

RIVER

SIDE

TYPE

AND SIZE COMPONENT COMPONENT

237 1~18-inch

RCP

Straight Wingwall Headwall 4-foot x 4-foot

RCB Sluice Gate None

CONDITION Unknown / Underwater GOOD Unknown /

Buried GOOD GOOD N/A

USIBWC Contract No.: IBM09B0009 Page 00.31.50 - 48

(23) Structure No. 236. This facility is located on the river side of the Rio Grande levee known as

Lateral A. This structure is between Valley View Road and the…