Oslo SOW and Plans 2021.pdf

PDF 16 MB Posted Apr 13, 2021

Attached to: Oslo Levee Repair Federal contract opportunity
Solicitation number: W912ES21Q0016
Issued by: Department of the Army Corps of Engineers Engineering District St Paul

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W912ES21Q00160002.pdf	PDF	May 3, 2021
W912ES21Q00160001.pdf	PDF	Apr 14, 2021
W912ES21Q0016.pdf	PDF	Apr 13, 2021

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OSLO PL84-99

OSLO LEVEE REPAIR

SCOPE OF WORK

1.1 SUMMARY OF WORK

The work required here consists of restoration of portions of the riverward levee slope for the City of Oslo, Minnesota that were damaged due to flooding. Work includes stripping topsoil, loose soil, and vegetative material in the area of scour damage; placement and compaction of topsoil, both stripped and imported, in the area of scour within the identified limits of stripping;

and turf establishment in the area of topsoil placement as well as any areas disturbed by the Contractor’s operations. Environmental protection and safety methods employed shall be as specified.

1.2 MEASUREMENT AND PAYMENT

The payment provided for in the contract shall constitute full compensation for furnishing all materials, equipment, and labor and for performing all work under the contract in a complete and acceptable manner. The contract work shall include providing plant, equipment, tools, supplies, labor, supervision, incidental materials, quality control, environmental protection, payment protection, meeting safety requirements, and for performing all work required for which separate payment is not otherwise provided. Compensation for all work shown, specified, or essential to completion of the project shall be included on the bid schedule. The payment provided for in the contract includes compensation for all risk, loss, damage, and expense arising out of the nature of the work or its prosecution, subject to conditions of the contract. Payment for the contract line item will constitute full compensation for furnishing the materials and constructing the work complete in place as specified.

1.2.1 Oslo Levee Repair

1. Payment: Payment will be made on a job basis complete for furnishing all materials, equipment and labor and performing all operations necessary for completing the Oslo Levee Repair as shown and specified. Work shall include but is not limited to stripping and temporarily stockpiling of stripped materials, including vegetation, topsoil, and organic material as well as removal and proper offsite disposal of material not placed back in the project; scarifying the surface on which topsoil is to be placed; furnishing, placing, and compacting of topsoil;

scarifying the finished topsoil surface prior to seeding; furnishing and placing seed, fertilizer, and wood fiber blanket complete with anchors; maintenance of turf until turf is accepted; and restoration of areas damaged due to the Contractor’s operations to pre-project conditions. All incidentals required to complete the work shall be included in the bid price.

2. Unit of Measure: job.

1.3 WORKSITE REQUIREMENTS / RESTRICTIONS

1.3.1 All work shall be conducted within the work limits shown.

1.3.2 Work hours: Permitted work hours are Monday through Friday from 7:00am to 6:00pm except on holidays when no work shall be performed. The Contracting Officer (CO) shall approve any work the Contractor proposes to conduct outside of these hours prior to work commencement.

1.3.3 Location of Utilities: The Contractor is responsible for locating all utilities prior to starting the work. Any damages to the site utilities is the responsibility of the Contractor to repair at no cost to the Government.

1.3.4 Sanitary Facilities: The Contractor is responsible for providing its own restroom facilities during construction.

1.4 SAFETY

All work shall be conducted in accordance with all federal, state and local laws and regulations and the current publication of the Corps of Engineers EM 385-1-1 Safety and Health Requirements Manual. The manual is available at the Corps of Engineers web site:

https://www.publications.usace.army.mil/Portals/76/Publications/EngineerManuals/EM_385-1- 1.pdf?ver=7Cpck_22Ct_-w6QSGyOKVQ%3d%3d.

1.4.1 Safety fence: Safety fencing will not be required for this project.

1.4.2 Traffic control: The Contractor shall be responsible for control of construction and hauling equipment into and out of the construction site from public roadways to provide safe conditions for public traffic impacted by the work.

1.5 SUBMITTALS

1.5.1 Preconstruction Submittals: All the submittals listed in this section are considered preconstruction submittals. The Contractor shall provide these submittals a minimum of 14 calendar days prior to planned initiation of work on the site. The Government will require the 14 calendar days to review and either approve or disapprove the submittals.

The Contractor shall resubmit any disapproved submittals and an additional 14 calendar days will be required from the date the submittal is received by the Government to review and either approve or disapprove the revised submittal. Additional time required for reevaluation of any revised submittals will not be grounds for a time extension for the contract.

Accident Prevention Plan: The Contractor shall submit and accident prevention plan (APP) that meets the requirements of EM 385-1-1.

Borrow Site: The Contractor shall provide documentation for the borrow site it proposes to use, verifying that the site meets the requirements as specified. Approval of the borrow site is required before material can be removed from the site.

Erosion Protection Plan: The Contractor shall submit an erosion protection plan identifying methods and materials proposed to be used to prevent erosion of topsoil placed in the project or any other soils exposed during the execution of the contract.

Topsoil Requirements and Test Results: The Contractor shall provide information documenting the results of material classification of imported topsoil. Test results for each proposed material source shall show that material brough to site meets the requirements for Atterberg limits, % passing the #200 sieve, pH, and organic content outlined in Section 1.8.1. Testing will not be required for stripped topsoil.

Turf Requirements: The Contractor shall provide certificates from the seed, fertilizer, and erosion control blanket, verifying that the materials proposed to be used meet specification requirements

1.6 Minnesota Department of Transportation References: References to the Minnesota Department of Transportation (MNDOT) Standard Specifications for Construction reflect the 2018 version.

1.7 BORROW SOURCE REQUIREMENTS: The Contractor shall use commercial borrow site(s) that are cleared for the presence of historic properties with either the Minnesota State Historic Preservation Office or the State Historical Society of North Dakota (SHPO). Borrow sources utilized by state’s Department of Transportation (MNDOT or NDDOT) are preapproved. Any site not of this type may require an archaeological survey and submission of report to relevant SHPO.

1.8 MATERIAL REQUIREMENTS

1.8.1 Topsoil: Topsoil shall be a natural soil representative of productive soils in the area that is free of subsoil, stumps, rock larger than one-inch diameter, brush, weeds, toxic substances, and other material detrimental to plant growth. One test result shall be provided/submitted, per material source, showing that material used on the project meets the following requirements:

Classified as CL (lean clay) based on ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (2017).

Test result for Atterberg limits based on ASTM D4318, Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils (2017; E2018) verifying that the topsoil meets CL requirements.

Test result for % passing the #200 sieve based on ASTM D1140, Standard Test Methods for Determining the Amount of Material Finer than 75-um (No. 200)

Sieve in Soils by Washing (2017) verifying that the topsoil meets CL requirements.

Test result for pH based on ASTM G51 Standard Test Method for Measuring pH of Soil for Use in Corrosion Testing (2018) verifying that the pH of the topsoil is in the range of 5.5 to 7.

Test result for organic content based on ASTM D2974, Determining the Water (Moisture) Content, Ash Content, and Organic Material of Peat and Other Organic Soils (2020) verifying that the organic content of the topsoil is between 3 and 20 percent.

1.8.2 Seed: The permanent seed mix to be used in the project shall meet requirements for mix number 25-141, Mesic General Roadside as specified in Section 3876 of the MNDOT Standard Specifications for Construction. Seed for temporary cover crop shall meet the requirements for seed mix 21-110 Oats Cover Crop.

1.8.3 Fertilizer: The fertilizer applied to the permanent seed mix shall be one as recommended by the seed supplier.

1.8.4 Erosion Control Blanket: The erosion control blanket shall at a minimum meet the requirements of category 4N of Table3885-2 of the MNDOT Standard Specifications for Construction.

1.8.5 Erosion Control Blanket Anchors: The anchors for the erosion control blanket shall meet the requirements for blanket category 4 in Table 3885-4 of the MNDOT Standard Specifications of Construction.

1.9 PRECONSTRUCTION MEETING

After the Contractor has received the notice to proceed, the Contractor shall attend a preconstruction meeting with the Contracting Officer Representative (COR) at the project site.

The purpose of this meeting is to discuss the construction schedule, safety, work area and traffic constraints, work hours, scope of work, and to review other contract requirements. All work shall be coordinated with the Contracting Officer.

1.10 PERMITS

The Contractor is responsible for obtaining all permits required to complete the work.

1.11 CONTRACT PERIOD

With the exception of turf maintenance, the Contractor shall complete all work within 60 days after award. Once the Contractor begins work, the work shall proceed and be completed in a continuous manner, including final cleanup of the site.

1.12 DESCRIPTION OF WORK

The Contractor shall complete all work in this section in a complete and acceptable manner.

1.12.1 Work Limits: All work shall be conducted within the work limits shown. The Contractor shall notify the Contracting Officer if it proposes to do any work outside of these limits.

Approval by the Contracting Officer is required before any work can be conducted outside of the work limits.

1.12.2 Erosion prevention: Prior to work commencement, the Contractor shall furnish and install erosion protection features as necessary to prevent loss of topsoil or any other exposed soils resulting from the work of this contract.

1.12.3 Safety: The Contractor shall execute safe working operations at all times, including but not limited to, methods used to caution traffic when site work equipment or delivery trucks are entering and exiting the site from public roadways.

1.12.4 Stripping: The Contractor shall strip topsoil as required to remove all vegetative material. Material around the scarp face shall be stripped until competent material is encountered. Stripped topsoil material shall be temporarily stored on site or at the designated storage area as shown and spread back in the project after imported topsoil has been placed. Vegetative material obtained from stripping operations shall be properly disposed of offsite in accordance with all local, state, and federal regulations.

1.12.5 Placement of Topsoil: The Contractor shall place and compact topsoil in lifts not to exceed 8 inches. Compaction within the scarp area shall be achieved by a minimum of three passes of standard compaction equipment such as sheepsfoot roller, pneumatic-tired roller, hand-operated compactor, or other approved equipment well suited for the type of soil being compacted. The top 4 inches of topsoil throughout the disturbed area shall not be compacted prior to seed placement. If compaction equipment used leaves a smooth compacted surface, the surface shall be scarified prior to placing additional fill or seed.

The final graded surface of the topsoil on the levee face shall have a constant slope that ties into the undamaged portions of the levee face both upslope and downslope of the restored area. This finished surface shall prevent water from ponding on the levee slope.

1.12.6 Seeding: The Contractor shall place seed at the application rates as specified in Table 3876-1 in MNDOT Standard Specification for Construction using standard seeding methods. The permanent seed mix shall be placed during the identified seeding window specified in Table 2575-1 in MNDOT Standard Specification for Construction. In the event that the permanent seed mix cannot be placed within the specified seeding window, a temporary cover crop shall be placed with the permanent seed mix placed during the next available seeding window. Fertilizer shall be placed at the same time the permanent seed mix is placed at a rate recommended by the fertilizer supplier. The erosion control blanket shall be installed and anchored as recommended by the erosion control blanket manufacturer or supplier immediately after the permanent seed is installed.

1.12.7 Maintenance of Turfed Area: The turfed area shall be watered as necessary until the permanent seed is fully established. Turf is considered to be fully established if there is a minimum of 100 grass plants per square foot and is reasonably free of weeds and visual imperfections as assessed by the Contracting Officer.

1.12.8 Clean-up / Restoration: The Contractor is responsible for clean-up and disposal of all debris offsite in accordance with local, county, state and federal regulations as well as for restoring the site to pre-project conditions, including all areas within or outside of the work limits that are damaged by the Contractor’s operations.

ATTACHMENTS: Site Plans and Sections

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SOLICITATION NO.:

CONTRACT NO.:

ISSUE DATE:

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2019 FLOOD REPAIRS

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APPROVED BY:

APPROVAL RECOMMENDED BY:

CHIEF DIVISIONENGR & CONST

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CHIEF

CHIEF BRANCH

BRANCH

CHIEF BRANCH

PROJECT MANAGER

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MENDATION OF ALL DRAWINGS IN THIS SET.

SIGNATURES INDICATE OFFICIAL RECOM-

MENT AS REQUIRED BY ER 1110-1-8152.

WITHIN THE SCOPE OF THEIR EMPLOY-

APPEAR ON THESE PROJECT DOCUMENTS

TRATION DESIGNATIONS OF INDIVIDUALS

THE INITIALS OR SIGNATURES AND REGIS-

PAUL DISTRICT CORPS OF ENGINEERS.

THIS PROJECT WAS DESIGNED BY THE ST.

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W912ES21Q0016

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LINEAR FEET OF ADDITIONAL SCARP AREA TO REPAIR.

CONTRACTING OFFICER. IT IS ESTIMATE THAT THERE IS 360

AREA. LOCATIONS ARE UNKNOWN AND WILL BE CONFIRMED WITH THE

SOME AREAS ALONG THE LOWER PART OF THE LEVEE HAVE A SECOND REPAIR 5.

WORK LIMIT ENDS AT THE CLOSURE STRUCTURE.4.

WORK LIMIT ENDS AT THE EDGE OF 500TH STREET.3.

WORK LIMIT IS ALONG RIVERWARD TOE OF THE LEVEE.2.

WORK LIMIT IS ALONG LANDWARD CREST OF THE LEVEE.1.

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SHEET ID

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GRAVEL ROAD

ALONG EXISTING

20' ACCESS

STAGING

AREA

RAILROAD

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SHEET NOTES:

A1 100' 200'0

SCALE: 1"=100'

PLAN VIEW

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C -1 x x x .d g n

CONTRACTING OFFICE.

STAGING AREA IS A PREVIOUSLY CLEARED AREA. CONFIRM AREA WITH1.

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SEE NOTE 1

WORK LIMIT LINE

SEE NOTE 2

WORK LIMIT LINE

EXISTING LEVEE

SCARIFY 4" MIN.

3:1

SLOPE

3:1

SLOPE

TOE OF EXISTING LEVEE 1' BELOW REPAIR AREA

6" STRIPPING

1' ABOVE REPAIR AREA

6" STRIPPING

SEE NOTE 1

WORK LIMIT LINE

SEE NOTE 2

WORK LIMIT LINE

EXISTING LEVEE

TOPSOIL AND SEED

COMPACTED TOPSOIL

3:1

SLOPE

3:1

SLOPE

TOE OF EXISTING LEVEE

SEE NOTE 1

WORK LIMIT LINE

SEE NOTE 2

WORK LIMIT LINE

EXISTING LEVEE

OVERFILLED TOPSOIL

3:1

SLOPE

3:1

SLOPE

TOE OF EXISTING LEVEE

SEE NOTE 2

WORK LIMIT LINE

TOE OF EXISTING LEVEE

3:1

SLOPE

EXISTING LEVEE

SEE NOTE 1

WORK LIMIT LINE

1' ABOVE REPAIR AREA

6" STRIPPING

SCARIFY 4" MIN.

1' ABOVE REPAIR AREA

6" STRIPPING

SCARIFY 4" MIN.

1' BELOW REPAIR AREA

6" STRIPPING

1' BELOW REPAIR AREA

6" STRIPPING

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SCALE: NTS

C-301

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TYPICAL SECTION: STEP 1- SCARIFY EXISTING CONDITION

TYPICAL SECTION: STEP 2 - OVERFILL ERODED AREA WITH TOPSOIL

TYPICAL SECTION: STEP 3 - COMPACTED, SCARIFY AND SEED

SHEET NOTES:

T Y

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SCALE: NTS

TYPICAL SECTION: STEP 1 - SCARIFY EXISTING CONDITION WITH 2 REPAIR AREAS

ABOVE WILL APPLY TO EACH REPAIR AREA.

REPAIR AREAS ARE TO BE SCARIFIED/STRIPPED. STEPS 2 & 3 IN NOTE 3

TWO REPAIR AREAS. TYPICAL SECTION D6 SHOWS STEP 1 AND HOW THE

IT IS ESTIMATED THAT THERE ARE 360 LINEAR FEET WHERE THERE ARE

THE LEVEE SLOPE. CONFIRM LOCATIONS WITH THE CONTRACTING OFFICER.

THERE ARE LOCATIONS WHERE THERE ARE TWO REPAIR AREAS ALONG 5.

WIDTH OF REPAIR AREA VARIES. IT IS APPROXIMATELY 3'.4.

STEP 3 IS TO COMPACT THE AREA AND SEED (SEE TYPICAL SECTION B1).

STEP 2 IS TO OVERFILL THE AREA WITH TOPSOIL (SEE TYPICAL SECTION D1).

EITHER SIDE OF THE REPAIR AREA (SEE TYPICAL SECTION F1).

STEP 1 IS TO SCARIFY THE EXISTING GROUND INCLUDING STRIPPING 1' ON

TO REPAIR THE AREA:3.

WORK LIMIT IS ALONG THE RIVERWARD TOE OF THE LEVEE.2.

WORK LIMIT IS ALONG THE LANDWARD CREST OF THE LEVEE.1.

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Sign_OSLOFR_PLANS_2020DEC21.pdf

OSLOFR_G-001xxx

OSLOFR_G-002xxx

OSLOFR_G-003xxx

OSLOFR_C-101xxx

OSLOFR_C-102xxx

OSLOFR_C-301xxx

File details come from the government source that posted it. Updated Apr 13, 2021.