W912PP19R0022_Lauer_Dam_Amendment_0004.pdf

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing items 8 and 15, and returning or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment your desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE

2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicable)

7. ADMINISTERED BY (If other than Item 6) CODE

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICITATION

NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended, is not extended.

12. ACCOUNTING AND APPROPRIATION DATA (If required) copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NO.

IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15C. DATE SIGNED

15A. NAME AND TITLE OF SIGNER (Type or print)

16C. DATE SIGNED

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

PAGE OF PAGES

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

NSN 7540-01-152-8070

Previous edition unusable

PROJECT: Lauer Dam Rehabilitation Project, Modoc County, CA

1. This is Amendment No. 0004 to Solicitation No. W912PP19R0022; 25 July 2019. The following revisions shall be incorporated into the specifications. All other provisions shall remain unchanged.

U.S. ARMY ENGINEER DISTRICT, ALBUQUERQUE

CORPS OF ENGINEERS

4101 JEFFERSON PLAZA, N.E.

ALBUQUERQUE, NEW MEXICO 87109-3435

J

W912PP19R0022

1 2

07/25/2019

06/21/2019

W912PP19R0022

AMENDMENT No. 0004

2. SPECIFICATIONS: Delete the following listed pages and substitute the pages attached hereto. On the revised pages, for convenience, changes are emphasized by STRIKETHROUGH for deletions and UNDERLINE for additions from the previous issue. All portions of the revised (or new) pages shall apply whether or not changes have been indicated.

Delete Page Insert Page

Proposal Schedule, Page 3f/151 Proposal Schedule, Page 3f/151 Section 01 11 00, Pages 4-10 Section 01 11 00, Pages 4-10 Section 01 50 00, Pages 6-7 Section 01 50 00, Pages 6-7 Section 31 10 00, Page 2 Section 31 10 00, Page 2 Section 31 23 16, Pages 4-5 Section 31 23 16, Pages 4-5

3. DRAWING CHANGES: The following drawings have been revised:

A-11, SHEET 11 of 45

////////LAST ITEM////////

Solicitation No. W912PP19R0022 Page 3f of 151

PROPOSAL SCHEDULE (Cont’d)

Item Unit No. Description Quantity Unit Price Amount

0026 Reinforced Concrete Spillway, to include: Furnishing and placing reinforced concrete, forms, and materials for the construction of spillway.

90 CY $_________ $

0027 Spillway Backfill, to include:

Placing backfill at the spillway sill.

1 JOB *** $

0028 Miscellaneous Metal Fabrications, to include:

Furnishing and installing miscellaneous metal work, safety posts, pipe guardrails, air vent outlets, bollards, and other structures.

1 JOB *** $

0029 EWS Building – Concrete, to include: Furnishing and constructing EWS cast-in-place Precast EWS concrete building, as shown on the drawings.

1 JOB *** $

0030 Placing Topsoil, to include:

Placement of topsoil cover over disturbed borrow area.

1,500 CY $_________ $

0031 Seeding, Soil Supplements, and Topsoil Erosion Control Matting, to include:

Furnishing and placing seed to re-vegetate areas for reclamation, including borrow areas and other disturbed areas. Includes erosion control on topsoil.

20 ACRE $_________ $

AMENDMENT 0004

Bureau of Indian Affairs SECTION 01 11 00

01 11 00 -4

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid SUMMARY OF WORK

1.8 CONSTRUCTION ACTIVITIES

A. Construction activities for the 2019 calendar year are restricted to rockfill borrow development and limited site work. Construction activities for the 2019 calendar year include excavating and processing rockfill, constructing the access road to the spillway, and performing stripping, clearing, and grubbing activities provided erosion control facilities are constructed and left in place. No modifications to the existing dam or spillway or excavations for the new dam will be permitted in 2019.

B. Construction activities at the spillway may only take place after work at the dam is complete.

C. Employ best management practices to preserve the natural landscape and land use values. Except where earthmoving is required for temporary and permanent structures, approved staging/stockpiling areas, and borrow activity, all trees, shrubbery, and other vegetation shall be protected from damage.

D. Upon completion of the project, all work areas shall be left in a condition to provide proper drainage, protection from erosion, and to establish vegetation. Any removed topsoil shall be replaced in locations to facilitate revegetation. Impacts to land within the project area shall be reduced through implementation of site erosion control. The final site condition will be approved by the CO or COR.

1.9 APPLICABLE CODES, STANDARDS, AND SPECIFICATIONS

A. Comply with codes and standards applicable to each type of work, and as listed in individual sections.

1. Where a conflict occurs between different reference documents or between reference documents and the Specifications, the COR will resolve the conflict in the best interest of the Project.

1.10 TRIBAL EMPLOYMENT RIGHTS ORDINANCE

A. The Contractor is subject to a Tribal license tax and a Tribal Employment Rights Ordinance (TERO) tax fee, and shall work with the Pit River Tribe to include possible hiring of tribal member labor.

B. TERO tax fees and license taxes

1. The TERO tax fee is equivalent to three percent (3%) of the total gross value of the contract, although it is the Contractor’s responsibility to contact the Pit River Tribe at the time of bidding to confirm the appropriate license tax and TERO tax fee is applied.

2. The TERO tax fees shall either be deducted from the first payment made at the beginning of the contract or paid in incremental payments to coincide with the

01 11 00 -5

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid SUMMARY OF WORK contractual payment schedule, or as otherwise negotiated between the Contractor and the Pit River Tribe’s Tribal Employment Rights Commission.

C. Indian Preference—Department of the Interior

1. The Contractor agrees to give preferences to Indians who can perform the work required regardless of age (subject to existing laws and regulations), sex, religion, or tribal affiliation for training and employment opportunities under this contract and, to the extent feasible consistent with the efficient performance of this contract, training and employment preferences and opportunities shall be provided to Indians regardless of age (subject to existing laws and regulations), sex, religion, or tribal affiliation who are not fully qualified to perform under this contract. The Contractor also agrees to give preference to Indian organizations and Indian-owned economic enterprises in the awarding of any subcontracts consistent with the efficient performance of this contract. The Contractor shall maintain such records as are necessary to indicate compliance with this paragraph.

2. In connection with the Indian employment preference requirements of this clause, the Contractor shall also provide opportunities for training incident to such employment. Such training shall include on-the-job, classroom, or apprenticeship training which is designed to increase the vocational effectiveness of an Indian employee.

3. If the Contractor is unable to fill its training and employment needs after giving full consideration to Indians as required by this clause, those needs may be satisfied by selection of persons other than Indians in accordance with the clause of this contract entitled “Equal Opportunity.”

4. If no Indian organizations or Indian-owned economic enterprises are available for awarding of subcontracts in connection with the work performed under this contract, the Contractor agrees to comply with the provisions of this contract involving utilization of small business concerns, small business concerns owned and controlled by socially and economically disadvantaged individuals, or labor surplus area concerns.

5. As used in this clause:

a. “Indian” means a person who is a member of an Indian Tribe. If the Contractor has reason to doubt that a person seeking employment preference is an Indian, the contractor shall grant the preference but shall require the individual within thirty (30) days to provide evidence from the Tribe concerned that the person is a member of that Tribe.

b. “Indian organization” means the governing body of any Indian Tribe or entity established or recognized by such governing body in accordance with the Indian Financing Act of 1974 (88 Stat. 77; 25 U.S.C. 1451); and

01 11 00 -6

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid SUMMARY OF WORK

c. “Indian-owned economic enterprise” means any Indian-owned commercial, industrial, or business activity established or organized for the purpose of profit provided that such Indian ownership shall constitute not less than 51 percent of the enterprise.

d. “Indian Tribe” means an Indian Tribe, band, nation, or other organized group or community, including any Alaska Native village or regional or village corporation as defined in or established pursuant to the Alaska Native Claims Settlement Act (85 Stat. 668; 43 U.S.C. 1601) which is recognized as eligible for the special programs and services provided by the United States to Indians because of their status as Indians.

6. The Contractor agrees to include the provisions of the clause in each subcontract awarded under this contract.

7. In the event of noncompliance with this clause, the Contractor's right to proceed may be terminated in whole or in part by the Contracting Officer and the work completed in a manner determined by the Contracting Officer to be in the best interests of the Government.

D. Indian Preference Program-Department of the Interior

1. In addition to the requirements of the clause of this contract entitled “Indian Preference—Department of the Interior,” the Contractor agrees to establish and conduct an Indian preference program which will expand the opportunities for Indian organizations and Indian-owned economic enterprises to receive a preference in the awarding of subcontracts and which will expand opportunities for Indians to receive preference for training and employment in connection with the work to be performed under this contract. In this connection, the Contractor shall:

a. Designate a liaison officer who will:

i. Maintain liaison with the Government and Tribe(s) on Indian preference matters;

ii. Supervise compliance with the provisions of this clause; and

iii. Administer the Contractor's Indian preference program.

b. Advise its recruitment sources in writing and include a statement in all advertisements for employment that Indian applicants will be given preference in employment and training incident to such employment.

c. Not less than twenty (20) calendar days prior to commencement of work under this contract, post a written notice in the Tribal office of any reservations on which or near where the work under this contract is to be performed, which sets forth the Contractor's employment needs and related training opportunities. The notice shall include the approximate number and types of employees needed, the approximate dates of employment; the experience or special skills required for employment, if any; training opportunities available; and all other pertinent information necessary to advise

01 11 00 -7

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid SUMMARY OF WORK prospective employees of any other employment requirements. The Contractor shall also request the Tribe(s) on or near whose reservation(s) the work is to be performed to provide assistance to the Contractor in filling its employment needs and training opportunities. The Contracting Officer will advise the Contractor of the name, location, and phone number of the Tribal officials to contact in regard to the posting of notices and requests for Tribal assistance.

d. Establish and conduct a subcontracting program which gives preference to Indian organizations and Indian-owned economic enterprises as subcontractors and suppliers under this contract. Consistent with the efficient performance of this contract, the Contractor shall give public notice of existing subcontracting opportunities by soliciting bids or proposals only from Indian organizations or Indian-owned economic enterprises. The Contractor shall request assistance and information on Indian firms qualified as suppliers or subcontractors from the Tribe(s) on or near whose reservation(s) the work under the contract is to be performed. The Contracting Officer will advise the Contractor of the name, location, and phone number of the Tribal officials to be contacted in regard to the request for assistance and information. Public notices and solicitations for existing subcontracting opportunities shall provide an equitable opportunity for Indian firms to submit bids or proposals by including:

i. A clear description of the supplies or services required including quantities, specifications, and delivery schedules which facilitate the participation of Indian firms;

ii. A statement indicating the preference will be given to Indian organizations and Indian-owned economic enterprises in accordance with Section 7(b) of Public Law 93–638; (88 Stat. 2205; 25 U.S.C. 450e(b));

iii. Definitions for the terms “Indian organization” and “Indian-owned economic enterprise” as prescribed under the “Indian Preference— Department of the Interior” clause of this contract;

iv. A representation to be completed by the bidder or offeror that it is an Indian organization or Indian-owned economic enterprise; and

v. A closing date for receipt of bids or proposals which provides sufficient time for preparation and submission of a bid or proposal. If after soliciting bids from Indian organizations and Indian-owned economic enterprises, no responsible bid is received, the Contractor shall comply with the requirements of paragraph (d) of the “Indian Preference—Department of the Interior” clause of this contract. If one or more responsible bids are received, award shall be made to the low responsible bidder if the bid price is determined to be reasonable. If the low responsive bid is determined to be unreasonable as to price, the Contractor shall attempt to negotiate a reasonable price and award a subcontract. If a reasonable price cannot be agreed upon, the Contractor shall comply with the requirements of paragraph (d) of the “Indian Preference—Department of the Interior” clause of the contract.

01 11 00 -8

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid SUMMARY OF WORK

e. Maintain written records under this contract which indicate:

i. The names and addresses of all Indians seeking employment for each employment position available under this contract;

ii. The number and types of positions filled by Indians and non-Indians, and the name, address and position of each Indian employed under this contract;

iii. For those positions where there are both Indian and non-Indian applicants, and a non-Indian is selected for employment, the reason(s) why the Indian applicant was not selected;

iv. Actions taken to give preference to Indian organizations and Indian-owned economic enterprises for subcontracting opportunities which exist under this contract;

v. Reasons why preference was not given to Indian firms as subcontractors or suppliers for each requirement where it was determined by the Contractor that such preference would not be consistent with the efficient performance of the contract, and

vi. The names and addresses of all Indian organizations and Indian-owned economic enterprises contacted, and receiving subcontract awards under this contract.

f. The Contractor shall submit to the Contracting Officer for approval a semiannual report which summarizes the Contractor's Indian preference program and indicates the number and types of available positions filled and dollar amounts of all subcontracts awarded to Indian organizations and Indian-owned economic enterprises and all other firms.

g. Records maintained pursuant to this clause will be kept available for review by the Government until expiration of one (1) year after final payment under this contract, or for such longer period as may be required by any other clause of this contract or by applicable law or regulation.

2. For purpose of this clause, the following definitions of terms shall apply:

a. The terms “Indian,” “Indian Tribe,” “Indian Organization, and “Indian-owned economic enterprise” are defined in the clause of this contract entitled “Indian Preference.”

b. “Indian reservation” includes Indian reservations, public domain Indian allotments, former Indian reservations on Oklahoma, and land held by incorporated Native groups, regional corporations, and village corporations under the provisions of the Alaska Native Claims Settlement Act, (85 Stat.

688; 43 U.S.C. 1601 et seq.).

c. “On or near an Indian Reservation” means on a reservation or reservations or within that area surrounding an Indian reservation(s) where a person seeking employment could reasonably be expected to commute to and from in the course of a work day.

3. Nothing in the requirements of this clause shall be interpreted to preclude Indian Tribes from independently developing and enforcing their own Indian preference

01 11 00 -9

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid SUMMARY OF WORK requirements. Such requirements must not hinder the Government's right to award contracts and to administer their provisions.

4. The Contractor agrees to include the provisions of this clause including this paragraph (d) in each subcontract awarded under this contract and to notify the Contracting Officer of such subcontracts.

5. In the event of noncompliance with this clause, the Contractor's right to proceed may be terminated in whole or in part by the Contracting Officer and the work completed in a manner determined by the Contracting Officer to be in the best interest of the Government.

1.11 MANUFACTURER’S SPECIFICATIONS

A. Materials, applications, and tests specified by reference to published standards of a society, association, code, or other published standards are included in the Specifications as if written in their entirety.

B. Products and processes included in the Specifications shall conform to the manufacturer’s latest published Specifications, as of the date established for receipt of bids.

C. Provide sworn affidavits from manufacturers certifying that material, products, and processes delivered and used for the Work meet the specified requirements.

Affidavits shall not relieve CONTRACTOR from responsibility for full compliance with the requirements of the Specifications.

1.12 MEANS AND METHODS

A. Means and methods of construction shall be such as CONTRACTOR or Subcontractors may choose; subject, however, to the CO or COR’s right to reject means and methods proposed by CONTRACTOR that:

1. Constitute a hazard to the Work, persons, or property.

2. Will not produce finished Work in accordance with terms of the Contract Documents.

3. Are contrary to specified means or methods required in the Contract Documents.

B. The right to reject means and methods of CONTRACTOR or Subcontractor shall not be construed or interpreted as acceptance of control of means or methods by the Government.

C. The Government’s approval or failure to exercise right to reject means and methods shall not relieve CONTRACTOR of his obligation to complete the Work in accordance with the requirements of the Contract Documents.

01 11 00 -10

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid SUMMARY OF WORK

D. Sole responsibility for control of all means and methods lies with CONTRACTOR for all work.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

Not Used

END OF SECTION

Bureau of Indian Affairs SECTION 01 50 00

01 50 00-6

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid TEMPORARY FACILITIES

3.11 SAFETY

A. Safety and Health

1. CONTRACTOR shall have sole responsibility for construction site safety.

2. Maintain an accurate record of, and report to the Government, all cases of death, occupational diseases, or traumatic injury to employees or the public, and property damage.

3.12 CLEANUP AND DISPOSAL OF WASTE MATERIALS

A. SCOPE

1. Cleanup and dispose of waste materials and rubbish in accordance with these Specifications and applicable Laws and Regulations. Should a conflict exist in the requirements for cleanup and disposal of waste materials, the most stringent requirement shall apply.

B. CLEANUP

1. Keep work and storage areas free from accumulations of waste materials and rubbish, and before completing the Work, remove all plant and storage facilities, buildings, including concrete footings and slabs, rubbish, unused materials, concrete forms, and other materials that are not a part of the permanent Work.

2. Upon completion of the Work, and following removal of construction facilities and required cleanup, re-grade, reclaim, and leave work areas in a neat manner conforming to the natural appearance of the landscape.

C. DISPOSAL OF WASTE MATERIALS

1. Dispose of waste materials, including but not restricted to, cleared and grubbed vegetation, refuse, garbage, sanitary wastes, chemical additives, industrial wastes, oil, and other petroleum products, by removal from the construction area. Dispose of material in an appropriate off-site waste disposal facility.

2. Burning of cleared vegetation and waste materials shall not be permitted.

3. Dispose of cleared and grubbed vegetation and unsuitable or unused earth materials in the rockfill borrow pits prior to reclaiming the borrow area.

unsuitable or waste excavated earth materials in designated waste areas as shown on the Drawings. Chip woody vegetation prior to disposal. Place disposed material at the waste areas to the maximum allowable elevation as required by CO or COR. Slope permanent side slopes of the waste material to no steeper than 3H:1V (horizontal to vertical) or as required by CO or COR.

Bureau of Indian Affairs SECTION 01 50 00

01 50 00-7

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid TEMPORARY FACILITIES

All materials placed in the on-site disposal area shall be compacted by controlled routing of construction equipment.

Bureau of Indian Affairs SECTION 31 10 00

31 10 00-2

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid CLEARING AND GRUBBING

3.2 PROTECTION

A. Protect any trees, plant growth, and features not requiring removal for the Work.

B. Protect any archeological findings discovered during execution of the Work. Notify CO or COR immediately of any discovery such as but not limited to human remains, pot shards, arrowheads.

C. Protect benchmarks and survey monuments from damage or displacement. Repair or replace all benchmarks and survey monuments damaged during clearing and grubbing. CO or COR will replace damaged BIA-provided control points in accordance with Section 01 71 23: CONSTRUCTION SURVEYING.

D. The limits of site disturbance shall be no more than 10 feet outside of required work areas except as shown on the Drawings or otherwise approved by CO or COR.

3.3 CLEARING

A. Remove, haul, and dispose of all trees, shrubs, grasses, weeds, debris, trash, rubble, downed timber, branches and other materials on the surface. Reserve and stockpile trunks from trees with a diameter at breast height of 6-inches or more and that are at least 8 feet long for use by the Pit River Tribe.

B. Clear adjacent to cut or fill sections to 10 feet outside of slope lines or as shown on the Drawings.

3.4 GRUBBING

A. Remove stumps, main root balls, and root systems.

1. Remove roots to a lateral extent of 8 feet, and to a depth of 5 feet, or until root diameter is less than ½ inches; whichever is encountered first.

3.5 DISPOSAL

A. Dispose of all brush, tree trunks, stumps, roots, and debris from clearing operations as required by Section 01 50 00: TEMPORARY FACILITIES.

3.6 MAINTENANCE OF CLEARED AREAS

A. Maintain cleared work areas in a condition free from additional vegetation growth for the duration of Work. Use of herbicides to discourage plant growth shall not be allowed unless approved by CO or COR. CONTRACTOR will be compensated for clearing each work area only once. If weed and brush growth require additional clearing, this shall be performed solely at the expense of the CONTRACTOR.

Bureau of Indian Affairs SECTION 31 23 16

31 23 16-4

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid EXCAVATION

C. Coordinate final foundation excavation with related Work in Section 31 23 13:

SUBGRADE PREPARATION.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 GENERAL

A. Complete all required excavations regardless of the type, nature, or condition of the materials encountered unless specifically directed otherwise in writing from the COR.

B. Blasting is not permitted for excavation.

C. Excavate to lines, grades, and dimensions shown and as necessary to accomplish Work. Excavate to within tolerance of plus or minus 1 inch except where dimensions or grades are shown or specified as maximum or minimum, or where approved by the CO or COR. Allow for forms, working space, topsoil, slope protection, riprap and similar items where applicable. Trim to neat lines where concrete is to be deposited against earth unless approved by the CO or COR.

D. Do not excavate to beyond the lines and grades shown without written authorization of the CO or COR. Backfill all over-excavated areas with required overlying fill or backfill material. Notify the CO or COR of all over-excavations prior to placing any backfill.

E. Perform all excavations in the dry. If moisture conditioning is required for planned fill materials, keep water application to the minimum necessary to prevent subgrade or foundation damage due to over watering.

F. Selectively excavate, handle, haul, stockpile and process borrow materials as necessary to yield suitable types and sufficient quantities of the various fill and backfill materials required for construction of the Work.

3.2 STRIPPING AND STOCKPILING TOPSOIL

A. Complete applicable work specified in Section 31 10 00 – CLEARING AND GRUBBING, prior to stripping topsoil.

B. Unless otherwise approved by the CO or COR, strip the top 6 inches of the surface soil as a minimum, and deeper if organic soils or materials are encountered. Remove roots larger than 1 inch, rocks larger than 3 inches, and all other debris prior to stockpiling the topsoil.

Bureau of Indian Affairs SECTION 31 23 16

31 23 16-5

Lauer Dam Rehabilitation May 2019 1510870 – Issued for Bid EXCAVATION

C. Stockpile topsoil at designated locations where it does not interfere with other items of the Work. Stabilize side slopes and protect from erosion.

3.3 ROCKFILL BORROW

A. For rockfill borrow excavation, conventional equipment shall be considered a D9 Caterpillar tractor with a single shank ripper or larger.

B. If rockfill borrow material is encountered that cannot be excavated with this equipment, the CO or COR shall be immediately notified and provided with performance summary and proposed alternative means of excavation.

3.4 FINAL EXCAVATION FOR DAM AND STRUCTURE FOUNDATIONS

A. Take all necessary precautions to preserve the material below and beyond the established lines of all excavation in the soundest possible condition. Repair damage to foundation material beyond the required excavation lines due to frost, wetting, drying, erosion, physical disturbance, ineffective dewatering, or CONTRACTOR’s operations at no cost to the Government.

B. For foundation excavation at embankment shells:

1. Strip topsoil and organic materials as specified above.

2. Excavate overburden soils to provide a suitable foundation for the embankment and to obtain clay borrow for the upstream clay blanket.

3. Remove any remaining roots from the excavated soils and stockpile for use as borrow for the clay blanket.

C. For plinth excavation:

1. For plinth excavation, conventional equipment shall be considered a 335F Caterpillar excavator with a medium stick and rock ripping bucket or equivalent, with a production rate of 30 bank cubic yards per hour.

2. If excavation for the plinth cannot be accomplished with this equipment at the specified production rate, the Engineer shall be immediately notified and provide performance test results.

3. Remove all loose material at the bottom of the excavation in preparation for surface treatment.

3.5 PERMANENT EXCAVATION SLOPES

A. Shape, trim, and finish cut slopes to conform with lines, grades, and cross sections with proper allowance for topsoil or slope protection.

EXISTING

LAUER DAM

CLEARING AND

GRUBBING LIMITS

(APPROX 7.5 ACRES)

LIMITS OF OUTLET WORKS

CHANNEL EXCAVATION

LIMITS OF

ROCKFILL

EMBANKMENT

EXCAVATION

BREACH DAM

AT APPROX LOCATION OF

EXISTING OUTLET WORKS

(DWG A-17)

LAUER RESERVOIR

C PROPOSED DAM

L

APPROX

PROPERTY

BOUNDARY

LIMITS OF

TOPOGRAPHIC

SURVEY

4+008+0012+0016+00

CG-1

CG-2

CG-3

CG-4

CG-5

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US FOREST

SERVICE

SECONDARY

ROCKFILL

BORROW AREA

(NOTE 1)

PRIMARY

ROCKFILL

BORROW AREA

(NOTE 1)

STAGING

AREA

STATE OF

CALIFORNIA

US BUREAU OF

LAND MANAGEMENT

CG-14

CG-15

FENCED AREA

DO NOT DISTURB

TREE STOCKPILE LOCATION

FOR PIT RIVER TRIBE

A-11

CLEARING, GRUBBING, AND

DEMOLITION PLAN

NOTES:

1. RESTRICTED AREAS WILL BE STAKED/FENCED IN FIELD AS

DIRECTED BY THE CO OR COR.

2. TREES SHALL BE REMOVED IN ACCORDANCE WITH THE

SPECIFICATIONS AND AS DIRECTED BY THE CO OR COR .

3. CLEAR AND GRUB BORROW AREAS AS REQUIRED FOR

BORROW DEVELOPMENT, INCLUDING AREAS WHERE RIPPING,

PROCESSING, HAULING, AND STOCKPILING WILL TAKE PLACE.

4. CHIP GREEN WASTE.

U.S. Department of Interior

Bureau of Indian Affairs

Safety of Dams Program

Pacific Region

GEI Project 1510870

SHEET NO.

DWG. NO.

APPISSUE/REVISIONNO. DATE

Designed:

Checked:

Drawn:

If this scale bar does not measure

1" then drawing is not original scale.

Attention:

1"

4601 DTC Boulevard

Denver, Colorado 80237

303-662-0100

CMMBID SET0 5/31/19

May 31, 2019

Lauer Dam Rehabilitation

XL Ranch Reservation, CA

Approved By:

Approval Date:

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P. EGGERS

A. LOCKMAN

N. JORGENSEN

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CONTROL POINTS

POINT

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CG-29

NORTHING

2490895.40

2490656.65

2490607.52

2490091.58

2490030.41

2489987.80

2490160.93

2490160.93

2490335.93

2490335.93

2490185.93

2490180.53

2491105.66

2491060.46

2491171.17

2491414.21

2491475.35

2491168.98

2491095.11

2490985.84

2490925.02

2490856.28

2490760.12

2490720.99

2490640.90

2490688.15

2490766.72

2490796.90

2490823.90

EASTING

6980932.34

6980771.74

6980666.70

6980306.61

6980196.33

6979907.27

6979829.52

6979910.38

6979829.52

6980129.52

6980129.52

6980229.30

6980784.69

6980864.79

6980957.21

6980879.52

6980892.69

6981009.79

6980987.40

6980931.75

6981004.84

6981031.83

6981038.75

6981031.65

6980998.71

6980950.78

6980973.52

6980973.17

6980968.83

SCALE, FEET

0 80 160

CMMREVISION 11 7/24/19