A001_SF30.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE PAGE OF PAGES

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

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

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) 9A. AMENDMENT OF SOLICITATION NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

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.

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 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; 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 you 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.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS,

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

D. OTHER (Specify type of modification and authority)

E. IMPORTANT:

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

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

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 a nd effect.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA

BY

(Signature of Contracting Officer)

16C. DATE SIGNED

PREVIOUS EDITION UNUSABLE STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

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

( ) 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).

1 51

A001 12/10/2015 AZ FLAP 89(1)

6905001

FEDERAL HIGHWAY ADMINISTRATION

CENTRAL FEDERAL LANDS HIGHWAY DIVISION

12300 WEST DAKOTA AVENU, SUITE 360

LAKEWOOD, COLORADO 80228

ATTENTION: MEGAN MAVIS

DTFH6816B00002

11/16/2015

0*

✔ * See Below

Invitation for Bid Amendment A001:

-Replace page A-iii with new A-iii bearing a revision date of December 10, 2015. This changes the Request for Technical Information date to December 15, 2015.

-Replace page A-1 with new A-1 bearing a revision date of December 10, 2015. This changes the bid due date from 12/16/2015 by 2:00 pm local time to 12/22/2015 by 3:00 pm local time in block 13.A.

-Replace page A-3 with new A-3 bearing a revision date of December 10, 2015. This changes the Physical Data to include a Geotechnical Report and ROW Exhibit.

-Remove Special Contract Requirements (SCRs) pages E-20 though E-21 and replace with pages E-20 through E-21 bearing a revision date of December 10, 2015.

-Remove Davis Bacon Wage Determination pages D-1 through D-8 and replace with pages D-1 through D-8 bearing a revision date of December 10, 2015. This replaces General Decision Number "AZ150008 08/07/2015 AZ8" with "AZ150008 11/06/2015 AZ8."

-Remove Appendix A Utilities and replace with new Appendix A Utilities bearing a revision date of December 10, 2015.

*FAILURE TO ACKNOWLEDGE THIS AMENDMENT IN BLOCK 19 OF THE SF 1442 BY THE DESIGNATED DATE AND HOUR SPECIFIED IN THE SOLICITATION MAY RESULT IN REJECTION OF YOUR BID (REFER TO SF-1442, PAGE A-2, OF THE SOLICITATION) megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Typewritten Text

NOTICE TO BIDDERS

A-iii

This Solicitation Contains a Price Evaluation Factor - The Government will apply a factor of 10% to an apparent low bid submitted by a large business when we also receive a bid from a certified HUBZone small business concern. The 10% factor does not apply to apparent low bids submitted by small businesses. See FAR Clause 52.219-4 Notice of price evaluation preference for HUBZone small business concerns.

In the event this full and open competition results in a contract award to a qualified HUBZone SBC after a price evaluation preference, FAR Clause 52.236-1, Performance of Work by the Contractor does not apply.

§126.700 of the Code of Federal Regulations (Title 13, Part 126, Subpart G), stated below, will replace the performance of work requirements stated in the above mentioned FAR clause.

A qualified HUBZone SBC receiving a contract under this solicitation for general construction must spend at least 50% of the cost of the contract incurred for personnel on its own employees or employees of other qualified HUBZone SBCs. This requirement may be met by expending at least 50% of the cost of the contract incurred for personnel on its employees or it may subcontract at least 35% of the cost of the contract performance incurred for personnel to one or more qualified HUBZone SBCs. A qualified HUBZone SBC prime contractor may not, however, subcontract more than 50% of the cost of the contract incurred for personnel to non-qualified HUBZone SBCs.

Bid Guarantee – Follow the requirements of FAR Clause 52.228-1 Bid Guarantee and Subpart

102.03 of the FP-03. Bid bonds must be originals and have original signatures and corporate seals.

Photocopied and faxed copies of bonds will be rejected and cause your bid to be non-responsive.

ATTENTION: Minority, Women-owned, and Disadvantaged Business Enterprises (DBEs). The Department of Transportation (DOT), offers working capital financing and bonding assistance for transportation related contracts. DOT's Bonding Assistance Program (BAP) offers bid, performance and payment bonds on contracts up to $1,000,000. DOT's Short-Term Lending Program (STLP) offers lines of credit to finance accounts receivable. Maximum line of credit is $500,000 with interest at the prime rate. For further information, call (800) 532-1169. Internet address:

http://osdbuweb.dot.gov.

Accuracy and Completeness of Bid- The Contractor is fully responsible to verify that all data is correct when an offer is submitted. Failure to properly update your data may cause the offer to be rejected.

Request for Technical Information – Questions relative to the plans and SCRs for this solicitation will only be accepted in writing (see Block 9 on Page A-3).

TECHNICAL QUESTIONS REGARDING THIS SOLICITATION WILL NOT BE

ACCEPTED AFTER 4 P.M. ON DECEMBER 8, 2015

Questions can be submitted to CFLContracts@dot.gov. Questions and answers will be posted at http://www.fbo.gov

A001 December 10, 2015 http://osdbuweb.dot.gov/ mailto:CFLContracts@dot.gov http://www.fbo.gov/ megan.mavis Line megan.mavis Typewritten Text

A-1

SOLICITATION, OFFER

AND AWARD

(Construction, Alteration or Repair)

1. SOLICITATION NO.

DTFH6816B00002

2. TYPE OF SOLICITATION

SEALED BID (IFB)

NEGOTIATED (RFP)

3. DATE ISSUED

11/16/2015

PAGE OF

PAGES

IMPORTANT - THE "OFFER SECTION ON THE REVERSE MUST BE FULLY COMPLETED BY OFFEROR.

4. CONTRACT NO.

5. REQUISITION/PURCHASE REQUEST NO. 6. PROJECT NO.

AZ FLAP 89(1)

7. ISSUED BY:

FEDERAL HIGHWAY ADMINISTRATION

CENTRAL FEDERAL LANDS DIVISION

12300 WEST DAKOTA AVENUE, SUITE 167

LAKEWOOD, COLORADO 80228

CODE: 69050001 8. ADDRESS OFFER TO:

MEGAN MAVIS, CONTRACT SPECIALIST

FEDERAL HIGHWAY ADMINISTRATION

CENTRAL FEDERAL LANDS DIVISION

12300 WEST DAKOTA AVENUE, SUITE 167

LAKEWOOD, COLORADO 80228

9. FOR INFORMATION CALL

SEE PAGE A-3

A. NAME:

SEE PAGE A-3

B. TELEPHONE NO. (Include area code)

SEE PAGE A-3

SOLICITATION

NOTE: In sealed bid solicitations "offer" and "offeror" mean "bid" and "bidder."

10. THE GOVERNMENT REQUIRES PERFORMANCE OF THE WORK DESCRIBED IN THESE DOCUMENTS:

ROADWAY CONSTRUCTION PROJECT IN STRICT ACCORDANCE WITH:

1. FEDERAL ACQUISITION AND TRANSPORATION ACQUISITION REGULATIONS (FAR & TAR)

2. DEPARTMENT OF LABOR, DAVIS BACON MINIMUM WAGE RATES

3. SPECIAL CONTRACT REQUIREMENTS

4. PLANS

5. BID SCHEDULE

6. STANDARD SPECIFICATIONS FOR CONSTRUCTION OF ROADS AND BRIDGES ON FEDERAL HIGHWAY

PROJECTS, FP-03, U.S. CUSTOMARY UNITS

7. SUBCONTRACTING PLAN (IF APPLICABLE)

See Subsection 104.04 of the FP-03 for governing order of precedence

11. The Contractor shall begin performance within 10 calendar days and complete it within * calendar days after receiving award notice to proceed. The performance period is mandatory negotiable. *Refer to Subsection 108.01 as amended in the Special Contract Requirements.

12A. THE CONTRACTOR MUST FURNISH ANY REQUIRED PERFORMANCE AND PAYMENT BONDS?

(If "YES," indicate within how many calendar days after award in Item 12B.) YES NO

12B. CALENDAR DAYS

13. ADDITIONAL SOLICITATION REQUIREMENTS:

A. Sealed offers in original and 0 copies to perform the work required are due at the place specified in Item 8. by 2:00 p.m. (hour) local time on 12/16/15 (date). If this is a sealed bid solicitation, offers will be publicly opened at that time. Sealed envelopes containing offers shall be marked to show the offeror's name and address, the solicitation number, and the date and time offers are due.

B. An offer guarantee is is not required.

C. All offers are subject to the (1) work requirements and (2) other provisions and clauses incorporated in the solicitation in full text or by reference.

D. Offers providing less than 60 calendar days for Government acceptance after the date offers are due will not be considered and will be rejected.

NSN 7540-01-155-3212 1442-102 STANDARD FORM 1442 (REV. 4-85)

Prescribed by GSA FAR (48 CFR) 53-236-1(e)

X

A001 December 10, 2015 megan.mavis Typewritten Text 12/22/15 megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Line megan.mavis Line megan.mavis Typewritten Text 3:00 megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Typewritten Text megan.mavis Typewritten Text

A-3

Item 8: LOCATION OF PUBLIC BID OPENING: Offers must be received by designated date and time as stated in Block 13A.

Item 9: FOR GENERAL INFORMATION: Call 720-963-3090 or e-mail us at

CFLContracts@dot.gov.

FOR TECHNICAL INFORMATION (plans and specifications): Questions must be submitted in writing by e-mail at CFLContracts@dot.gov or by fax to 720-963-3360.

FOR PHYSICAL DATA: The following data is available electronically with this solicitation at:

• Final Hydraulic Report

• Pavements & Materials Report

• Geotechnical Report

• ROW Exhibit

Item 11: COMPLETION DATE: Work shall be completed on or before the date specified in Subsection 108.01 of the SCRs.

Item 12A: PERFORMANCE AND PAYMENT BONDS: See FAR Clause 52.228-15

Performance and Payment Bonds-Construction (Clauses begin on Page C-1) and Subsection 102.06 of the FP-03.

Item 13B: BID BOND AMOUNT: See FAR Provision 52.228-1 Bid Guarantee

(Provisions begin on Page B-1) and Subsection 102.03 Bid Guarantee of the FP-03. All bid guarantees must have original signatures with original corporate seals.

Item 19: ACKNOWLEDGMENT OF AMENDMENTS: FAILURE TO

ACKNOWLEDGE AMENDMENTS, IN BLOCK 19 OF THE SF-1442, BY

THE DESIGNATED DATE AND HOUR SPECIFIED IN THE SOLICITATION

MAY RESULT IN REJECTION OF YOUR BID. If amendments are issued, they will be posted to www.fbo.gov.

Item 24: SUBMITTING INVOICES: See Subsection 109.08 Progress Payments of the

FP-03.

ESTIMATED

PRICE: The price range of the project work is between $20,000,000.00 and $25,000,000.00.

mailto:CFLContracts@dot.gov mailto:CFLContracts@dot.gov http://www.fbo.gov/

General Decision Number: AZ150008 11/06/2015 AZ8

Superseded General Decision Number: AZ20140008

State: Arizona

Construction Type: Highway

Counties: Coconino, Maricopa, Mohave, Pima, Pinal, Yavapai and Yuma Counties in Arizona.

HIGHWAY CONSTRUCTION PROJECTS

Note: Executive Order (EO) 13658 establishes an hourly minimum wage of $10.10 for 2015 that applies to all contracts subject to the Davis-Bacon Act for which the solicitation is issued on or after January 1, 2015. If this contract is covered by the EO, the contractor must pay all workers in any classification listed on this wage determination at least $10.10 (or the applicable wage rate listed on this wage determination, if it is higher) for all hours spent performing on the contract. The EO minimum wage rate will be adjusted annually. Additional information on contractor requirements and worker protections under the EO is available at www.dol.gov/whd/govcontracts.

Modification Number Publication Date 0 01/02/2015 1 06/12/2015 2 08/07/2015 3 11/06/2015

* CARP0408-005 10/01/2015

Rates Fringes

CARPENTER (Including Cement Form Work).......................$ 24.63 11.54

* ENGI0428-001 06/01/2015

Rates Fringes

POWER EQUIPMENT OPERATOR

Group 1.....................$ 22.59 9.34 Group 2.....................$ 25.86 9.34 Group 3.....................$ 26.94 9.34 Group 4.....................$ 27.97 9.34

POWER EQUIPMENT OPERATORS CLASSIFICATIONS:

GROUP 1: A-frame boom truck, air compressor, Beltcrete, boring bridge and texture, brakeman, concrete mixer (skip type), conductor, conveyor, cross timing and pipe float, curing machine, dinky (under 20 tons), elevator hoist (Husky and similar), firemen, forklift, generator (all), handler, highline cableway signalman, hydrographic mulcher, joint inserter, jumbo finishing machine, Kolman belt

D-1 loader, machine conveyor, multiple power concrete saw, pavement breaker, power grizzly, pressure grout machine, pump, self-propelled chip spreading machine, slurry seal machine (Moto paver driver), small self-propelled compactor (with blade-backfill, ditch operation), straw blower, tractor (wheel type), tripper, tugger (single drum), welding machine, winch truck

GROUP 2:

ALL COUNTIES INCLUDING MARICOPA: Aggregate Plant, Asphalt plant Mixer, Bee Gee, Boring Machine, Concrete Pump, Concrete Mechanical Tamping-Spreading Finishing Machine, Concrete Batch Plant, Concrete Mixer (paving & mobile), Elevating Grader (except as otherwise classified), Field Equipment Serviceman, Locomotive Engineer (including Dinky 20 tons & over), Moto-Paver, Oiler-Driver, Operating Engineer Rigger, Power Jumbo Form Setter, Road Oil Mixing Machine, Self-Propelled Compactor (with blade-grade operation), Slip Form (power driven lifting device for concrete forms), Soil Cement Road Mixing Machine, Pipe-Wrapping & Cleaning Machine (stationary or traveling), Surface Heater & Planer, Trenching Machine, Tugger (2 or more drums).

MARICOPA COUNTY ONLY: Backhoe < 1 cu yd, Motor Grader (rough), Scraper (pneumatic tired), Roller (all types asphalt), Screed, Skip Loader (all types 3<6 cu yd), Tractor (dozer, pusher-all).

GROUP 3:

ALL COUNTIES INCLUDING MARICOPA: Auto Grade Machine, Barge, Boring Machine (including Mole, Badger & similar type directional/horizontal), Crane (crawler & pneumatic 15>100 tons), Crawler type Tractor with boom attachment & slope bar, Derrick, Gradall, Heavy Duty Mechanic-Welder, Helicopter Hoist or Pilot, Highline Cableway, Mechanical Hoist, Mucking Machine, Overhead Crane, Pile Driver Engineer (portable, stationary or skid), Power Driven Ditch Lining or Ditch Trimming Machine, Remote Control Earth Moving Machine, Slip Form Paving Machine (including Gunnert, Zimmerman & similar types), Tower Crane or similar type.

MARICOPA COUNTY ONLY: Backhoe<10 cu yd, Clamshell < 10 cu yd, Concrete Pump (truck mounted with boom only), Dragline <10 cu yd, Grade Checker, Motor Grader (finish-any type power blade), Shovel < 10 cu yd.

GROUP 4: Backhoe 10 cu yd and over, Clamshell 10 cu yd and over, Crane (pneumatic or crawler 100 tons & over), Dragline 10 cu yd and over, Shovel 10 cu yd and over.

All Operators, Oilers, and Motor Crane Drivers on equipment with Booms, except concrete pumping truck booms, including Jibs, shall receive $0.01 per hour per foot over 80 ft in addition to regular rate of pay

Premium pay for performing hazardous waste removal $0.50 per hour over base rate.

D-2

IRON0075-004 08/01/2015

COCONINO, MARICOPA, MOHAVE, YAVAPAI & YUMA COUNTIES

Rates Fringes

Ironworker, Rebar................$ 26.00 21.77

Zone 1: 0 to 50 miles from City Hall in Phoenix or Tucson Zone 2: 050 to 100 miles - Add $4.00 Zone 3: 100 to 150 miles - Add $5.00 Zone 4: 150 miles & over - Add $6.50

* LABO0383-002 06/01/2015

Rates Fringes

Laborers:

Group 1.....................$ 16.49 4.95 Group 2.....................$ 17.39 4.95 Group 3.....................$ 18.09 4.95 Group 4.....................$ 19.03 4.95 Group 5.....................$ 19.89 4.95

LABORERS CLASSIFICATIONS:

GROUP 1: All Counties: Chipper, Rip Rap Stoneman. Pinal County Only: General/Cleanup Laborer. Maricopa County Only: Flagger.

GROUP 2: Asphalt Laborer (Shoveling-excluding Asphalt Raker or Ironer), Bander, Cement Mason Tender, Concrete Mucker, Cutting Torch Operator, Fine Grader, Guinea Chaser, Power Type Concrete Buggy

GROUP 3: Chain Saw, Concrete Small Tools, Concrete Vibrating Machine, Cribber & Shorer (except tunnel), Hydraulic Jacks and similar tools, Operator and Tender of Pneumatic and Electric Tools (not herein separately classified), Pipe Caulker and Back-Up Man-Pipeline, Pipe Wrapper, Pneumatic Gopher, Pre-Cast Manhole Erector, Rigger and Signal Man-Pipeline

GROUP 4: Air and Water Washout Nozzleman; Bio-Filter, Pressman, Installer, Operator; Scaffold Laborer; Chuck Tender; Concrete Cutting Torch; Gunite; Hand-Guided Trencher; Jackhammer and/or Pavement Breaker; Scaler (using boson's chair or safety belt); Tamper (mechanical all types).

GROUP 5: AC Dumpman, Asbestos Abatement, Asphalt Raker II, Drill Doctor/Air Tool Repairman, Hazardous Waste Removal, Lead Abatement, Lead Pipeman, Process Piping Installer, Scaler (Driller), Pest Technician/Weed Control, Scissor Lift, Hydro Mobile Scaffold Builder.

* PAIN0086-001 04/01/2014

D-3

Rates Fringes

PAINTER

PAINTER (Yavapai County only), SAND BLASTER/WATER BLASTER (all Counties)......$ 19.50 4.85

ZONE PAY: More than 100 miles from Old Phoenix Courthouse $3.50 additional per hour.

SUAZ2009-001 04/20/2009

Rates Fringes

CEMENT MASON.....................$ 19.28 3.99

ELECTRICIAN......................$ 22.84 6.48

IRONWORKER (Rebar) Pima County.................$ 23.17 14.83 Pinal County................$ 20.27 8.35

LABORER

Asphalt Raker...............$ 15.49 3.49 Compaction Tool Operator....$ 14.59 2.91 Concrete Worker.............$ 13.55 3.20 Concrete/Asphalt Saw........$ 13.95 2.58 Driller-Core, diamond, wagon, air track............$ 16.94 3.12 Dumpman Spotter.............$ 14.99 3.16 Fence Builder...............$ 13.28 2.99 Flagger Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 12.35 1.59 Formsetter..................$ 16.09 3.97 General/Cleanup Laborer Coconino, Maricopa, Mohave, Pima, Yavapai & Yuma.......................$ 14.54 3.49 Grade Setter (Pipeline).....$ 17.83 5.45 Guard Rail Installer........$ 13.28 2.99 Landscape Laborer...........$ 11.39 Landscape Sprinkler Installer...................$ 15.27 Pipelayer...................$ 14.81 2.96 Powderman, Hydrasonic.......$ 16.39 2.58

OPERATOR: Power Equipment Asphalt Laydown Machine.....$ 21.19 6.05 Backhoe < 1 cu yd Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 17.37 3.85 Backhoe < 10 cu yd Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 18.72 3.59 Clamshell < 10 cu yd Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 18.72 3.59

D-4

Concrete Pump (Truck Mounted with boom only) Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 19.92 7.10 Crane (under 15 tons).......$ 21.35 7.36 Dragline (up to 10 cu yd) Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 18.72 3.59 Drilling Machine (including Water Wells).....$ 20.58 5.65 Grade Checker Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 16.04 3.68 Hydrographic Seeder.........$ 15.88 7.67 Mass Excavator..............$ 20.97 4.28 Milling Machine/Rotomill....$ 21.42 7.45 Motor Grader (Finish-any type power blade) Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 21.92 4.66 Motor Grader (Rough) Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 20.07 4.13 Oiler.......................$ 18.15 8.24 Power Sweeper...............$ 16.76 4.44 Roller (all types Asphalt) Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 18.27 3.99 Roller (excluding asphalt)..$ 15.65 3.32 Scraper (pneumatic tired) Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 17.69 3.45 Screed Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 17.54 3.72 Shovel < 10 cu yd Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 18.72 3.59 Skip Loader (all types <3 cu yd)......................$ 18.28 5.30 Skip Loader (all types 3 < 6 cu yd) Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 18.64 4.86 Skip Loader (all types 6 < 10 cu yd)...................$ 20.15 4.52 Tractor (dozer, pusher -all) Coconino, Mohave, Pima, Pinal, Yavapai & Yuma......$ 17.26 2.65

PAINTER

Coconino, Maricopa, Mohave, Pima, Pinal & Yuma..$ 15.57 3.92

TRUCK DRIVER

2 or 3 Axle Dump or Flatrack....................$ 16.27 3.30 5 Axle Dump or Flatrack.....$ 13.97 2.89 6 Axle Dump or Flatrack (<

D-5

16 cu yd)...................$ 17.79 6.42 Belly Dump..................$ 14.67 Oil Tanker Bootman..........$ 22.03 Self-Propelled Street Sweeper.....................$ 13.11 5.48 Water Truck 2500 < 3900 gallons.....................$ 18.14 4.55 Water Truck 3900 gallons and over....................$ 15.92 3.33 Water Truck under 2500 gallons.....................$ 15.94 4.16

WELDERS - Receive rate prescribed for craft performing operation to which welding is incidental.

Unlisted classifications needed for work not included within the scope of the classifications listed may be added after award only as provided in the labor standards contract clauses (29CFR 5.5 (a) (1) (ii)).

The body of each wage determination lists the classification and wage rates that have been found to be prevailing for the cited type(s) of construction in the area covered by the wage determination. The classifications are listed in alphabetical order of "identifiers" that indicate whether the particular rate is a union rate (current union negotiated rate for local), a survey rate (weighted average rate) or a union average rate (weighted union average rate).

Union Rate Identifiers

A four letter classification abbreviation identifier enclosed in dotted lines beginning with characters other than "SU" or "UAVG" denotes that the union classification and rate were prevailing for that classification in the survey. Example:

PLUM0198-005 07/01/2014. PLUM is an abbreviation identifier of the union which prevailed in the survey for this classification, which in this example would be Plumbers. 0198 indicates the local union number or district council number where applicable, i.e., Plumbers Local 0198. The next number, 005 in the example, is an internal number used in processing the wage determination. 07/01/2014 is the effective date of the most current negotiated rate, which in this example is July 1, 2014.

Union prevailing wage rates are updated to reflect all rate changes in the collective bargaining agreement (CBA) governing this classification and rate.

Survey Rate Identifiers

Classifications listed under the "SU" identifier indicate that

D-6 no one rate prevailed for this classification in the survey and the published rate is derived by computing a weighted average rate based on all the rates reported in the survey for that classification. As this weighted average rate includes all rates reported in the survey, it may include both union and non-union rates. Example: SULA2012-007 5/13/2014. SU indicates the rates are survey rates based on a weighted average calculation of rates and are not majority rates. LA indicates the State of Louisiana. 2012 is the year of survey on which these classifications and rates are based. The next number, 007 in the example, is an internal number used in producing the wage determination. 5/13/2014 indicates the survey completion date for the classifications and rates under that identifier.

Survey wage rates are not updated and remain in effect until a new survey is conducted.

Union Average Rate Identifiers

Classification(s) listed under the UAVG identifier indicate that no single majority rate prevailed for those classifications; however, 100% of the data reported for the classifications was union data. EXAMPLE: UAVG-OH-0010 08/29/2014. UAVG indicates that the rate is a weighted union average rate. OH indicates the state. The next number, 0010 in the example, is an internal number used in producing the wage determination. 08/29/2014 indicates the survey completion date for the classifications and rates under that identifier.

A UAVG rate will be updated once a year, usually in January of each year, to reflect a weighted average of the current negotiated/CBA rate of the union locals from which the rate is based.

WAGE DETERMINATION APPEALS PROCESS

1.) Has there been an initial decision in the matter? This can be:

* an existing published wage determination

* a survey underlying a wage determination

* a Wage and Hour Division letter setting forth a position on a wage determination matter

* a conformance (additional classification and rate) ruling

On survey related matters, initial contact, including requests for summaries of surveys, should be with the Wage and Hour Regional Office for the area in which the survey was conducted because those Regional Offices have responsibility for the Davis-Bacon survey program. If the response from this initial contact is not satisfactory, then the process described in 2.)

and 3.) should be followed.

With regard to any other matter not yet ripe for the formal process described here, initial contact should be with the Branch of Construction Wage Determinations. Write to:

D-7

Branch of Construction Wage Determinations Wage and Hour Division U.S. Department of Labor 200 Constitution Avenue, N.W.

Washington, DC 20210

2.) If the answer to the question in 1.) is yes, then an interested party (those affected by the action) can request review and reconsideration from the Wage and Hour Administrator (See 29 CFR Part 1.8 and 29 CFR Part 7). Write to:

Wage and Hour Administrator U.S. Department of Labor 200 Constitution Avenue, N.W.

Washington, DC 20210

The request should be accompanied by a full statement of the interested party's position and by any information (wage payment data, project description, area practice material, etc.) that the requestor considers relevant to the issue.

3.) If the decision of the Administrator is not favorable, an interested party may appeal directly to the Administrative Review Board (formerly the Wage Appeals Board). Write to:

Administrative Review Board U.S. Department of Labor 200 Constitution Avenue, N.W.

Washington, DC 20210

4.) All decisions by the Administrative Review Board are final.

END OF GENERAL DECISION

D-8

E-20

Flagstaff-Vista Overlook

Limit operations as follows:

• Maintain public access to the Vista Overlook at Station 13+09 RT for the duration of the project.

• Provide 2-lane traffic at all times unless approved by the CO.

• Do not begin ground-disturbing operations until weed mitigation operations are completed and approved by the CO.

• No nighttime work is allowed within 0.25 miles of Fry Canyon (Station 132+72) from

March to June to avoid impacts to the Mexican Spotted Owl breeding season.

• Remove trees between September 1 and March 1 to avoid bird nesting season. Permit with the Coconino National Forest will be issued to FHWA for the removal with the contractor coordinating all work with FHWA and the Coconino National Forest.

• Prior to removing existing pavement, provide a construction schedule that shows an acceptable surface for winter will be in place before November 1 of each year. An acceptable surface must be in place for the winter by November 1 of each year. An acceptable surface for the winter is the existing pavement prior to removal, or a 4” lift of asphalt pavement constructed at no expense to the Government. An acceptable surface includes functioning drainage that will not result in erosion or saturation of the subgrade beneath the driving surface or newly-constructed structures. All existing surfacing within the project limits must be patched or repaired according to FP-03 Section 404 prior to November 15 of each year.

• Where excavations for utility adjustments or culvert installations are made in areas where the existing pavement has not yet been removed, at no additional cost to the Government, cap the excavations with a minimum of 4 inches of crushed aggregate according to Section 308 and 3 inches of hot or cold asphalt concrete according to Section 404 and 417 before the end of shift.

• Removal of existing asphalt surfacing is not allowed after September 15 of any year without prior approval of CO.

• No blasting is allowed at night. Perform blasting operations between 10 am and 5 pm.

• Right of Way Restrictions include several parcels on this project. These include parcels between approximately Sta. 350+00 and Sta. 448+21. The parcels will be available for use no later than November 18, 2015 as outlined in the ROW Clearance Certification.

Perform no work except to maintain traffic control devices, erosion control devices, the roadway driving surface, and to control dust during the listed Federal holidays surrounding days and

E-21

Flagstaff-Vista Overlook special events:

● Memorial Day Weekend: 12:00 Noon Friday to 6:00 am Tuesday.

● Independence Day: 12:00 Noon July 3 to 6:00 am July 5.

If July 4 falls on a weekend, Friday, or Monday, do not work the weekend.

● Labor Day Weekend: 12:00 Noon Friday to 6:00 am Tuesday.

● Thanksgiving: 12:00 Noon Wednesday to 6:00 am Monday.

● Christmas/New Years Holiday: 12:00 Noon December 23 to 6:00 am January 2.

If December 23 or January 1 falls on a Monday, do not work the adjacent weekend and do not work on December 23. If January 1 falls on a Friday, do not work the weekend.

● Local Special Events Coconino County Fair (tentatively scheduled for September 2016 and 2017) Fort Tuthill County Park events (as directed by CO).

Schedule at least 2 non-work days out of every 14 calendar days. The selected non-work days do not need to be consecutive, but they must be scheduled. Provide at least 2 weeks notice before changing the scheduled days off.

Exemptions to scheduled days off may be granted by written approval from the CO for specific project operations and/or for periods of limited duration.

Add the following:

A Notice to Proceed must be issued before commencement of any work.

The contract completion date for Schedule A, Option X, and Option Y is September 30, 2016 June 30, 2017.

Section 109. - MEASUREMENT AND PAYMENT

109.01 Measurement of Work. Delete the first paragraph and substitute the following:

109.01 Measurement of Work. Unless otherwise specified, measure when the work is in place and complete according to the contract requirements. Measure the actual work performed, except do not measure work outside the design limits or other adjusted or specified limits (staked limits). Measure structures to the lines shown on the plans or to approved lines adjusted to fit field conditions.

Delete the third paragraph and substitute the following:

Take measurements as described in Subsection 109.02, unless otherwise modified by the Measurement Subsection of the Section controlling the work being performed. Measurement of quantities for payment for the individual pay items will be based on the awarded unit price for each pay item according to Table 109-1.

Appendix A

Utilities

Project Flagstaff to Vista Overlook Project No. AZ FLAP 89(1)

Project Name Flagstaff-Vista Overlook

Copies of existing ADOT permits, subject to availability, may be obtained from the ADOT Area Permit Supervisor as listed below:

FLAGSTAFF DISTRICT

(928) 799-7520 1801 S. Milton Road

(928) 774-1491 Flagstaff, AZ 86001

POWER LINES:

Power lines and other utilities may be at various locations throughout the project limits. However, they are not anticipated to be in conflict. All work at or in close proximity to said lines shall be performed in accordance with all Federal, State, and local laws and regulations, including but not limited to:

(1) Arizona law regarding “Underground Facilities” (A.R.S. 40-360.21, .22, .24, .26 and .28).

(2) Arizona law regarding “High Voltage Power Lines and Safety Restrictions” (A.R.S. 40-360.41-.45).

(3) The Occupational Safety and Health Administration.

(4) The National Electric Safety Code.

The following agencies and utility companies have facilities in the area but area but are not anticipated to be in conflict:

ADOT Flagstaff Maintenance District Thomas Eckler

1801 S. Milton Road Flagstaff, AZ 86001

(928)774-1491

ADOT maintains the DMS sign and pedestal with the project limits and to be protected in place. The contractor shall contact ADOT District Blue Stake Office before construction.

City of Flagstaff

James Davis 211 W Aspen Ave

(928)213-2411

City of Flagstaff owns facilities within the project limits and to be protected in place. The contractor shall contact ADOT District Blue Stake Office before construction.

Forkert Engineering & Surveying, Inc. �

Joseph Forkert Consultant and Liaison to

AT&T - Legacy T Engineering 22311 Brookhurst Street, Suite 203

Huntington Beach, CA 92646 AT&T owns facilities in a duct bank with other companies within the project limits and to be protected in place. The contractor shall contact ADOT District Blue Stake Office before construction.

USFS Portable Water

Coconino National Forest Sean Untalan

1824 S. Thompson St.

Flagstaff, AZ 86001-8401

(928)527-3575

USFS owns facilities within the project limits and to be protected in place. The contractor shall contact ADOT District Blue Stake Office before construction.

Forest Highlands Golf Course

Bill Strauss Director of Public Works

1 Forest Highlands Flagstaff, AZ 86001-8401

(928)525-5264

Forest Highlands owns water and sewer facilities within the project limits and to be protected in place. The

SuddenLink

Sanford Yassie 1601 S Plaza Way

(928)606-2464

SuddenLink owns communication and cable TV facilities within the project limits and to be protected in place.

The contractor shall contact ADOT District Blue Stake Office before construction.

The following utility company has facilities with potential conflict with the proposed construction, and anticipates relocating prior to March 1, 2016:

APS

(Arizona Public Service)

Henry Miranda P.O. Box 53733

A001 December 10, 2015

Mail Station 3177 Phoenix, AZ 86201

(602)371-6605

There are APS vertical crossings in the project; that might need to be adjusted for proper vehicle clearance.

Also, the existing down guy deadman located at Sta. 443+60 at the culvert outlet is in the proposed flow line of the culvert. APS is to do the relocation of any vertical crossings and the down guy in conflict before March 01, 2016. Any project construction prior to March 1, 2016 must avoid working in APS vicinity. The

CenturyLink

Carole Wilson 112 N. Beaver

(928) 779-4773

There are CenturyLink vertical crossings in the project on APS poles that might need to be adjusted for proper vehicle clearance. Also, the pedestal located at Sta. 436+03 will be protected in place as the contractor grades around it. CentryLink is to do the relocation of any vertical crossings and the down guy in conflict before March 01, 2016. Any project construction prior to March 1, 2016 must avoid working in CentryLink vicinity. The contractor shall contact ADOT District Blue Stake Office before construction.

The following utility company has facilities in conflicts with the proposed construction. The contractor shall relocate coordinate with the utility as part of this project, and in accordance with the specifications on the plans and these special provisions:

UNISOURCE ENERGY SERVICES

Trenton Brooks

2901 W. Shamrell Blvd, Suite #110 Flagstaff, AZ 86005

(928) 525-8145

Unisource owns facilities within the project limits and to be protected in place. The contractor shall contact ADOT District Blue Stake Office before construction. Notify Trenton Brooks 5 working days prior to any gas relocations.

At the following Stations the contractor will need to adjust coordinate with Unisource valves & signs:

Sta 435+86 – Carsonite sign can be removed then replaced in the appropriate place.

Sta 444+25 – Valve box can be readjusted to match final grade of asphalt.

Sta 444+32 – Carsonite sign can be removed then replaced in the appropriate place.

Sta 444+33 – Vent can be raised during construction to all operation after grade is raised.

The Contractor is cautioned to use care when operating near these facilities. The contractor shall protect in place all utilities during any tree removals within the project limits.

It shall be the contractor’s responsibility to determine the exact location of the utilities prior to any construction operations and to notify the above mentioned utility companies at least two (2) working days prior to commencing any work on the project.

Page i

TABLE OF CONTENTS

REPORT PAGE

INTRODUCTION

Project Description Regional and Site Geology Regional and Local Seismic Setting Geologic Hazards

PROCEDURES AND RESULTS

Site Investigation Findings

RECOMMENDATIONS AND SUMMARY

Site Preparation Grading Requirements Slope Recommendations Shrink/Swell Factor Recommendations Drainage Structure Recommendations Retaining Wall Recommendations Additional Work

APPENDICES

Appendix A – Figures Appendix B – Soil Survey Results Appendix C – Photos

FLAGSTAFF TO VISTA OVERLOOK

COCONINO NATIONAL FOREST

COCONINO COUNTY, ARIZONA

INTRODUCTION

Project Description

This report presents the findings of a visual, limited subsurface investigation and provides preliminary geotechnical recommendations for the repair, reconstruction, and widening of AZ FLAP 89(1) Flagstaff to Vista Overlook, known locally as State Route 89 or Oak Creek Canyon Road. A Project Vicinity Map and Project Location Map are presented in Figure 1 of Appendix A.

The Central Federal Lands Highway Division (CFLHD) of the Federal Highway Administration (FHWA), in cooperation with the Arizona Department of Transportation and National Forest Service, is proposing to improve traffic operations on an 8.4 mile segment of the route by widening the roadway to provide adequate shoulders, flattening side slopes, extending drainage structures, and constructing passing lanes. This project is located immediately south of Flagstaff, Arizona, within the Coconino National Forest. The route extends from Flagstaff in a southerly direction through Oak Creek Canyon and Sedona, Arizona.

This project will consist of 4R improvements over the 8.4 miles programmed for reconstruction. The proposed improvements include widening the roadway template to 40 feet with two 12-foot travel lanes and 8-foot-wide paved shoulders. There are three major structures located within the project limits. Two of the structures are reinforced concrete box culverts, while the other structure is a reinforced concrete arch culvert. All three structures will be extended to accommodate the proposed roadway widening. Additional safety improvements are proposed along the route and include construction of various passing and turn lanes. Cross drainage structures will also be improved to accommodate the proposed widening, as well as ensure they meet hydraulic design requirements.

The main focus of this preliminary geotechnical report is to provide information for the development of the 30% preliminary plan set and provide recommendations for the proper construction of proposed improvements. This report summarizes findings from the geotechnical visual investigations and presents preliminary geotechnical recommendations for the design and construction of this project.

Regional and Site Geology

Arizona State Route 89, known as Oak Creek Canyon Road, lies within the Mogollon Rim, an escarpment that runs east to west through Arizona defining the boundary between the Colorado Plateau to the north and the Basin and Range Province to the south. The Mogollon Rim is approximately 200 miles long and ranges between 2,000 and 3,000 feet in height. Erosion has slowly modified the nature of the Rim, leaving behind scenic canyons and buttes.

The Mogollon Rim is comprised of a variety of geologic formations. The Rim is capped with basalt flows from nearby volcanoes, such as the House Mountain Shield volcano in the village of Oak Creek. Gravels exist beneath the basalt cap, which were formed by the erosion of additional layers that once topped the region. Below the rim gravels, various formations of sandstone and limestone exist, with a range of erosion resistance and hardness properties.

In the vicinity of the project route, on-site materials consist of the basaltic caprock, as the route generally passes over the top of the Mogollon Rim. Volcanic-derived soils may be acidic and high in sulfates, which is potentially corrosive to buried soil and concrete structures. However, this corrosive behavior was not evident in existing corrugated metal pipe and concrete culverts on site.

Regional and Local Seismic Setting

Arizona State Route 89 lies within the transitional area between the Mogollon Rim and Colorado Plateau, and is traversed by many dormant fault zones. These fault zones generally trend to the northwest and dip to the northeast. The Casner Cabin fault zone is located approximately 3 miles west of the southern limits of the project. The Casner Cabin fault zone forms two sharply defined, narrow grabens on Paleozoic bedrock and Pliocene volcanic rocks with a total displacement of at least 130 feet.

The Phone Booth faults lie approximately one mile north of the Casner Cabin fault zone.

The Phone Booth faults are defined as a moderately defined, narrow graben and narrow horst on trend with and northwest of the graben are formed on upper Miocene and Pliocene volcanic rock with total surface displacement of approximately 100 feet.

The Lake Mary fault zone is located approximately 5 miles east of the northern portion of the project route. The Lake Mary fault zone is the longest of several faults located southeast of the Pliocene-Quaternary San Francisco volcanic field, on the erosion surface cut onto Paleozoic rocks near the Colorado Plateau margin. The Lake Mary fault system displaces uppermost volcanic rocks approximately 450 feet.

Geologic Hazards

Most of the project area is underlain by a thin veneer of forest duff with colluvial sands and gravel derived from volcanic and sedimentary bedrock. Potential geologic hazards that could be associated with roadway construction in these geologic units include corrosive soils, slope instability, rockfall, flooding, and earthquakes.

Volcanic-derived soils may be acidic and high in sulfates, which is potentially corrosive to buried steel structures and concrete structures. Visual inspection of corrugated metal pipe culverts and reinforced concrete culverts did not identify the effects of corrosion degradation or sulfate attack. However, native soils should be tested for their corrosive potential and propensity for sulfate attack.

Seismic related hazards exist at the site and were discussed in the previous section.

Materials prone to liquefaction or amplified ground motions are not expected to be encountered at the project site. Due to the relatively steep topography in confined sections along the route, there is a potential for rockfall generated by earthquakes or freeze-thaw cycles, with sources from bedrock outcrops or from boulders in the hillside colluvium.

There are three major drainages within the project limits. These drainages pass through the roadway embankment by means of reinforced concrete box culverts or a concrete arch drainage structure, as noted in Table 1. These drainages are prone to significant flows during the spring runoff and summer thunderstorm seasons. During periods of heavy flow, these drainages may flood and have the potential to erode the toe of roadway embankments. However, there was no observed damage or scour in the channel or adjacent to roadway embankments.

Table 1. Major Drainage Structures.

Structure Name Location Size Fry Canyon 133+00 22’ x 15’ concrete arch Woody Wash 248+00 2 – 12’ x 12’ reinforced concrete box Landon Spring 369+50 3 – 10’ x 10’ reinforced concrete box

PROCEDURES AND RESULTS

Site Investigation

A visual inspection and limited subsurface investigation program of the proposed improvements within the project limits were conducted by Central Federal Lands Highway Division (CFLHD) Geotechnical personnel on October 1 and 2, 2012. The visual investigation was primarily focused on the following:

• Characterizing general roadway, structures, and culvert conditions,

• Identifying roadway geotechnical repair areas, and

• Identifying geological and geotechnical hazards.

The limited subsurface investigation program was focused on the investigation of potential cut/fill materials, as well as the completion of a topsoil survey. Seven shovel test pits, at various locations within the project limits, were completed as part of the subsurface investigation program.

Findings

Subsurface conditions along the proposed alignment generally consist of a thin veneer of forest duff and topsoil underlain by silty sand, gravel, cobbles, and boulders derived from volcanic and sedimentary bedrock units. Visual observations indicate that bedrock may be very shallow, less than five feet from the ground surface, in several locations along the route. Volcanic cinders were present on roadway shoulders and have been used as shouldering material along the length of the route. The Arizona DOT has a large stockpile of cinders in their maintenance yard within the project limits. Results of the shovel test pits are provided in Table 2.

Table 2. Shovel Test Pit Findings.

Test Pit Location Depth (ft) Soil Description TP-1 366+50, 40’ L 0.0 – 0.5 Brown, fine silty sand with gravel, cobbles and boulders (shovel refusal at 0.5’) TP-2 323+00, 30’ L 0.0 – 0.5 Red-brown sand with gravel and cobbles

0.5 – 1.0 Red-brown silt with low plasticity TP-3 112+00, 30’ L 0.0 – 0.5 Red-brown silty sand with gravel and cobbles TP-4 35+00, 35’ R 0.0 – 1.0 Red-brown sandy silt with some gravel TP-5 18+00, 30’ L 0.0 – 1.0 Brown sandy silt with some gravel TP-6 428+00, 20’ L 0.0 – 1.0 Topsoil TP-7 439+00, 20’ R 0.0 – 1.5 Red-brown silty sand with gravel

Surface conditions within the identified major drainages along the subject route generally consist of sand, gravel, cobble, and boulder alluvium. Observed boulders varied significantly in size, from 1-foot to 6-foot in diameter, especially in the Fry Canyon and Woody Wash drainages. The Landon Spring drainage is in a meadow area and boulders were not evident at the ground surface.

Material type and physical properties of encountered materials may vary with distance away from pit locations. This variability is due to topography and land forming processes.

Precise extrapolation of ground conditions between test pit locations is not recommended.

Visual inspection of the asphalt pavement along the project route indicated the presence of wheelpath fatigue cracking, but no other signs or areas of significant pavement distress.

No specific locations requiring subexcavation were noted. In 2001 the project route was overlain with a 2 inch thickness of asphalt concrete and a 0.5 inch thick friction course overlay.

RECOMMENDATIONS AND SUMMARY

Site Preparation

Clearing and grubbing of the project sites should be performed in accordance with Section 201 of the FP-03. Shallow bedrock conditions and surficial boulders, ranging between 1 and 2 feet in diameter, should be anticipated and may impact clearing and grubbing operations.

Based on conditions encountered during the subsurface investigation, it is not likely that a significant depth of topsoil will be present along the length of the project. There are localized areas within the project limits that contain a significant depth of topsoil, which may be stockpiled and used throughout the project. These areas are generally located within or adjacent to pasture and meadow areas on the northern extent of the project limits.

Silty sand with gravel is the predominant soil type found along the route. These materials exhibit good characteristics for use as embankment material. Occasionally, there are pockets of silt, which may not meet all the requirements for embankment material. Native soils used in embankments should be compacted to 95% of maximum density according to the requirements of Section 204 of the FP-03.

Grading Requirements

Due to the limited amount of local borrow sources or waste areas, and to maximize cut-to-fill balance on this project, it is anticipated that the majority of roadway excavation will be used in the construction of roadway embankments. It is anticipated that native materials will meet the requirements of embankment fill and bedding material, per Section 704 of the FP-03.

Slope Recommendations

In general, the maximum recommended slope ratios for proposed cut slopes vary between 2V:1H to 1V:1H for those cut slopes constructed in moderately weathered and fractured rock units. For those cut slopes constructed in soil, a maximum slope ratio of 1V:1.5H is recommended. The recommended slope ratio is dependent on the nature of the observed material and the existing stability of the slope.