C04_Att 1_SOW CedarCreek16_16A_Repairs.pdf

STATEMENT OF WORK

FOR

CEDAR CREEK WATERSHED

SITE 16/16A REPAIRS

05/21/2026

Table of Contents

1 INTRODUCTION

1.1 Mission

1.2 Background

1.3 Scope

2 GENERAL REQUIREMENTS ............................................................ Error! Bookmark not defined.

2.1 Non-Personal Services

2.2 Contractor Personnel Qualifications

2.3 Key Personnel

2.4 Location and Hours of Work

2.6 Invoicing

3 REQUIREMENTS/TASKS

3.1 Pre-Construction Meeting

3.2 Mobilization, Fence Removal and Removal of Water

3.3 Excavation, Common

3.4 Earthfill, Rock Riprap

3.5 Topsoiling, Vegetation

3.6 Fence

4 DELIVERABLES/SCHEDULE

5.5 Organizational Conflicts of Interest

1 INTRODUCTION

The United States Department of Agriculture Natural Resources Conservation Service (USDA-NRCS) Texas State Office requires construction services for the repairs of Cedar Creek Site dam sites No.16/16A located in Rockwall County, Texas.

1.1 Mission

The Natural Resources Conservation Service mission is to deliver conservation solutions so agricultural producers can protect natural resources and feed a growing world. The Watershed Protection and Flood Prevention Operations (WFPO) Program helps units of federal, state, local and federally recognized tribal governments (project sponsors) protect and restore watersheds.

1.2 Background

Cedar Creek Site No.16, National Inventory of Dams (NID) No. TX00791 was completed on August 30, 1969, with a service life of 50 years. Site 16 is a high hazard dam with an engineering design class of VII.

The site is located approximately 7 miles northwest of Terrell, Rockwall County, Texas. A site investigation of the embankment slopes, plunge basin, and spillway were examined and defined in the engineering investigation report dated July 12, 2019, with a CED concurrence of August 20, 2019. The wave berm has experienced excessive erosion, and the plunge basin side slopes have eroded. As a result of these deficiencies found during the site visit, a remedial design will be developed to alleviate the erosion of the wave berm and plunge basin side slopes.

Cedar Creek Site # 16A, National Inventory of Dams (NID) No. TX00790 was completed on August 30, 1969, with a service life of 50 years. Site 16A is a high hazard dam with an engineering design class of VII. The site is located approximately 7 miles southeast of Rockwall, Rockwall County, Texas. A site investigation of the embankment slopes, plunge basin, and spillway were examined and defined in the engineering investigation report dated July 12, 2019, with a CED concurrence of August 20, 2019.

Excessive erosion to wave berm, front slope, and plunge basin has occurred; and a construction modification to a portion of the embankment is needed. As a result of these deficiencies found during the site visit, a remedial design will be developed to alleviate the erosion of the wave berm and plunge basin side slopes.

1.3 Scope

The upstream wave berm repair for both Sites 16 and 16A will consist of stripping and stockpiling the topsoil from the embankment eroded area; performing excavation and earthfill activities to achieve the specified rock riprap subgrade; placing and anchoring geotextile fabric on the approved subgrade; placing rock riprap to the required thickness and limits as shown in the construction drawings; backfilling the toe of the rock riprap with earthen materials; blending the earthwork above the rock riprap into the existing embankment; establishing vegetation; and removing and reconstructing fence as shown on the construction drawings.

The existing plunge basins for both sites have experienced erosion along the side slopes of the basin and outlet channel. To prevent/retard future erosion, the basins will be armored with a blanket of rock riprap.

[Site 16A only] Plunge basin erosion has also caused damage to the principal spillway pipe in the vicinity of the pipe outlet. Repair of this damage includes excavating embankment material from around the damaged pipe sections; removing and reconstructing the damaged pipe cantilever, pipe support, and concrete cradle; replacing approximately 40 ft. of the damaged spillway pipe at the outlet; installing a new sand filter collar around a portion of the replaced pipe sections; and reconstructing the earthen embankment in this vicinity.

2 GENERAL REQUIREMENTS

The objective of this repair design is to create a rock wave berm along the upstream embarkment slope, as well as rock armor the naturally formed plunge basin to prevent future erosion and potential impacts on the embankment and principal spillway system. Additionally, for Site 16A, the principal spillway pipe will be repaired near the outlet.

2.1 Non-Personal Services

The Government shall neither supervise Contractor employees nor control the method by which the Contractor performs the required tasks. Under no circumstances shall the Government assign tasks to, or prepare work schedules for, individual Contractor employees, except for the site lead. It shall be the responsibility of the Contractor to manage its employees and to guard against any actions that are of the nature of personal services, or give the perception of personal services. If the Contractor believes that any actions constitute, or are perceived to constitute personal services, it shall be the Contractor’s responsibility to notify the Contracting Officer, in writing, immediately.

2.2 Contractor Personnel Qualifications

Quality control activities shall be accomplished by competent personnel. A competent person is: One who is experienced and capable of identifying, evaluating, and documenting that materials and processes being used will result in work that complies with the contract; and, who has authority to take prompt action to remove, replace, or correct such work or products not in compliance. Off-site testing laboratories shall be certified or inspected by a nationally recognized entity. Prior approval of each personnel, qualifications, authorities, certifications, and availability of the competent personnel who will perform the quality control activities shall be required.

2.3 Key Personnel

The Contractor shall assign to this contract the following key personnel:

1. Site Superintendent

2. Quality Control Manager

3. Safety Manager

During the first ninety (90) calendar days of performance, the Contractor shall make no substitutions of key personnel unless the substitution is necessitated by illness, death, or termination of employment. The Contractor shall notify the Contracting Officer, in writing, within 15 calendar days after the occurrence of any of these events and provide the information required below. After the initial 90-day period, the Contractor shall submit the information required below to the Contracting Officer at least 15 days prior to making any permanent substitutions.

The Contractor shall provide a detailed explanation of the circumstances necessitating the proposed substitutions, complete resumes for the proposed substitutes, and any additional information requested by the Contracting Officer. Proposed substitutes should have comparable qualifications to those of the persons being replaced. The Contracting Officer will notify the Contractor within 15 calendar days after receipt of all required information of the decision on substitutions. The contract will be modified to reflect any approved changes of key personnel.

2.4 Location and Hours of Work

Work under this contract is performed on site of Cedar Creek Dams 16/16A located in Rockwall County, Texas. Construction schedule will be required, prior to issuance of Notice to Proceed (NTP). Estimated performance time is [169 days (Cedar 16)] [175 days (Cedar 16A)], not to include move in.

The Contractor shall be responsible for establishing their work hours under this contract, except when access to a Federal facility is required, in which case the Government may limit the Contractors work based availability of agency employees.

Weather and security closures by their nature usually arise without advance notice. As such, the Government will coordinate with the Contractor as soon as possible once any delays are encountered.

2.6 Invoicing

Invoices shall be submitted to the Government for review and acceptance. Invoices shall be submitted monthly. Approved quantities documentation and related material certifications shall be required as appropriate.

Invoices must be submitted electronically through the Invoice Processing Platform (IPP) system and in accordance with the payment clause(s) in the contract.

3 REQUIREMENTS/TASKS

Construction Bid Schedule, Drawings, Specifications will be included in the requisition package.

As per the construction specifications, the Contractor shall, at minimum:

3.1 Pre-Construction Meeting

Meet with NRCS quality assurance personnel with submittals for required construction documents and certifications.

3.2 Mobilization, Fence Removal and Removal of Water

This item shall consist of performing all items of work for mobilization and demobilization, all operations necessary to accomplish the work including that work required to control water from entering the plunge basin or affecting wave berm construction, as well as removal of water from all borrow and designated excavations, the removal, disposal and/or salvage of all designated fences in the construction area

3.3 Excavation, Common

This item shall consist of all excavation required to construct the new rock riprap lined plunge basin, outlet channel, and riprap lined wave berm as shown on the drawings.

3.4 Earthfill, Rock Riprap

This item shall include all fill and backfill necessary for the completion of the wave berm and plunge basin subgrade as indicated in the construction drawings, furnishing and placing the rock riprap to construct the rock lined wave berm, rock lined plunge basin and outlet channel as shown on the drawings.

3.5 Topsoiling, Vegetation

This item shall consist of salvaging of approved topsoil from required excavations; from the stripping operations; and placing and spreading it on all areas designated to receive topsoil including the embankment, constructed earthfill slopes, and exposed excavated slopes not covered in rock riprap as indicated on the drawings, preparing the seedbed and furnishing and applying seed, hay mulch and/or tackifer, as well as fertilizer to all areas disturbed by construction, as well as within the boundaries of the designated campsite, designated haul/access roads, stockpile area, waste area, and borrow area(s) .

3.6 Fence

This item shall consist of furnishing all materials required and constructing fences of the type designated on the drawings.

4 DELIVERABLES/SCHEDULE.

Timely completion of deliverables is essential to a successful outcome. Below are the required due dates for each requirement/task.

Item No.

Deliverable Reference Due

1 Pre-Construction Meeting. SOW Section 3.1 Mutually acceptable date and time after contract award.

2 Mobilization, Fence Removal and Removal of Water.

SOW Section 3.2 Within 56 calendar days of contract award.

3 Excavation, Common. SOW Section 3.3 Within 59 calendar days of contract award.

4 Earthfill, Rock Riprap SOW Section 3.4 Within 111 calendar days of contract award

5 Topsoiling, Vegetation SOW Section 3.5 Within 126 calendar days of contract award

6 Fence SOW Section 3.6 Within 131 calendar days of contract award

5.5 Organizational Conflicts of Interest

The Contractor acknowledges that it is familiar with Federal Acquisition Regulation (FAR) Subpart 9.5, Organizational and Consultant Conflicts of Interest, and agrees to avoid, neutralize or mitigate such conflicts of interest in accordance with the principles set forth in the FAR. If the performance would require the Contractor, including subcontractors, to provide services related to systems or projects with which the Contractor is already directly concerned, either by prime or subcontract, that would cause an organizational conflict of interest, the Contractor shall immediately notify the Contracting Officer, in writing, and not perform the work until direction is provided by the Contacting Officer.