Hatch Summary of Questions-2009-12-09.pdf

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

River Segment Upper Rio Grande By:

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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Contractor Contractor Comment S&B Response Comments

1 Hatch 11/17/2009 SHS

It states that the "impervious material shall be lean clay (CL)", which is a Soil classification under ASTM D2847. ASTM D 2847 states that a minimum of 50% of the clay material is to pass the 200 sieve. However, the IBWC specification under 34 41 states that the 76% must pass the 200 sieve. This is an absolute. It does not give a maximum, nor does it state the value as a minimum. the 76% seems to be Quite high compared to classification (CL), and also our past experiences with this material. Also the spec calls for 100% of the material to pass 3" sieve. the classification (CL) allows up to 15% gravel prior to changing to classification (CL) with gravel, and up to 30% gravel prior to changing the Gravely Clay or (GC). We believe that the amount of 3-inch gravel or rock would allow too coarse a material for use as an embankment material,for one not allowing for optimum compaction, and second this may cause the mix to be permeable due to the large gravel sizes.Given the above concerns can we expect any changes in the specification governed by item 35 41. Construction levee?

the Specification states 76% passing the #200 Sieve. If 76.10% passes the #200 sieve the material meets the specification. For clarity the Word minimum will be added to the note to read

76% minimum will pass the #200 sieve. As clarification the specification allow up to 14% (not 30%) gravel or sand to be retained on the # 200 sieve with out adding the wording "with sand" as per foot note K.

This response has been Revised. See Question 45 for Addendum Revsion

2 Hatch 11/23/2009 Can the Vegetative water and/or the construction Water be drafted from the river?

No.

3 Hatch 11/23/2009 The drawings nor the specs indicate any fill zones on the project. Therefore, how much impervious material, previous material , or other types of soil are to be used and where will they be used?

The Fill Zone is the Prop Embankment limits. See Typical Sections.

4 Hatch 11/23/2009

There is a spec for cement stabilized Backfill. Where is this to be used?

In the specs, construction of levee section , page 23 part 4 ( measurement and payment ) , cement stab. Is listed in the measurement and payment, but there isn't a pay item for cement stab? Please direct me to more information on cement stab or if this project does not have cement stab.

There is no "Cement Stab" on this project. The cement stabilized backfill was a reference item to abandoning existing structures. All structures will be removed and no cement stabilization will be required for structure abandonment

5 Hatch 11/23/2009 The notes on sheet 3.01 for Impervious material is different that that shown in spec section 35.41.00-7 part 2 . Which are we to use?

Sheet No. 3.01.

This response has been Revised. See Question 45 for Addendum Revsion

6 Hatch 11/23/2009

Is there any idea as to how much top soil will be generated from the existing berm or from on site sources? It would be nice to have all the contractors bidding the project on the same playing field and therefore bidding x amount of CY's of top soil to be imported if any.

There will be no existing top soil generated from the existing material.

Hatch Summary of Questions.01.xls 1 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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Contractor Contractor Comment S&B Response Comments

7 Hatch 11/23/2009

Just for Clarification, it is my understanding that Bench Excavation is payment for benching the existing levee to the lines and grades shown in the plans. Embankment includes taking this benched excavation and placing it and also includes any borrow required to raise the levee to grade. Is this correct?

Bench excavation is payment fo the excavation to achieve benching requirements as shown in the cross-sections. Embankment is for placement of material from the benching to the top of levee excluding topsoil and flexbase. All material placed as embankment will need to meet the impervious material requirement on sheet 3.01.

8 Hatch 11/23/2009 On page 01.57.00-2 Section 1.3 describes a Field Monitor. My Question is does this person have to be on the project every day and can this person have other duties not related to environmental?

The FEM will be required to supervise clearing of vegetation, ground disturbing activities and implementation of erosion control programs and plans. The specification does not restrict the FEM from having other duties.

9 Hatch 12/1/2009

( 31.92.00 pg 4 ) Vegetation for Erosion control states a "Maintenance period of 120 Calendar Days will be required to be provided by the contractor for "permanent seeding" areas what will be required of the contractor during the maintenance period?

See Section 3.3 Seeding, this is what you need for permanent seeding. This is what and how it need to be maintained.

10 Hatch 12/1/2009

( 31.92.00. pg 4)Temporary seeding should be required during May 16 through January 14. How will it be determined that Temporary seeding will be required ( other than the occurrence of the Aforementioned time period )? If we are still constructing the project as a whole "on going operation " How will it be determined which parts of the project work will need temporary seeding?

Temp seeding is always required in working areas "areas not fully constructed", therefore these are the area that will require temp seeding during the period indicated.

11 Hatch 12/1/2009

(31.92.00 and plan Sheet 03.01) The paragraph states " Upon Establishment of 70% vegetative coverage, as determined by the COR, the COR shall have the option to require the contractor to continue watering as specified for a period not to exceed 30 days. However, rate and frequency may not be adjusted , with compliance-confirmation by the COR, to meet site conditions." 1.) What is the intent of this paragraph? 2.) How will the Watering be paid for? 3.) How will the COR determine that 70% of vegetative coverage has been obtained?

1.) The intent of this is to assure that 70% coverage is attained. 2.) Water will be paid by measurement. 3.) By judgement of the 70%.

12 Hatch 12/1/2009

( 31.92.00 and plan sheet 03.01) The paragraph stating "watering rates for seeding 0.25 gal /sy per cycle with 2 cycles per week for the first 3 weeks then 0.25 gal/ sy per cycle with 1 cycle per week for the next two weeks."

1.) What is the intent of this paragraph? 2.) How will this watering be paid for? 3.) When will this watering be required?

1.) The intent of this paragraph is to direct the contractor on how much water to use when watering for specific times after seeding. 2.) Paid by item 31 92 02. 3.) The watering is required after seeding Not Before.

Hatch Summary of Questions.01.xls 2 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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13 Hatch 12/1/2009

(31.92.00 and plan Sheet 03.01) The paragraph stating "SS-1 Tracking Agent shall be a ratio of 2:1, Two ( Emulsion) to one ( Water) and applied at a rate of 0.05 gallons per square yard. The SS-1 Tracking Agent required for drill seed operations, will not be paid for directly, but will be subsidiary to this item. Watering shall not be used with the drill seed method ." Assuming that this is a "Tracking " Agent; Will a Biodegradable alternate be allowable?

The specification does not limit the application method to strictly the broadcast method with a SS-

1 tacking agent alternatives are allowed.

14 Hatch 12/1/2009

( 31.41.00 page 7 and plan sheet 03.01) Concerning the "General Notes" on plan sheet 03.01 under the construction of levee second paragraph states* Impervious material shall be lean clay (CL) . The PI shall be greater than 15 and less than 30, Liquid limit shall not exceed 45, gradation shall consist of the dry material passing the 3 inch sieve and 76% passing the #200 Sieve", The paragraph under Section 35.41.00 page 7 of the final Technical specifications Part 2 Materials & Equipment Section 2.1 Materials A. fill Materials States " the fill material shall have a maximum liquid limit of 75% and a minimum passing the #200 sieve of 75%.. It appears that the two different specifications have been identified for the "Impervious Fill Material.

Which is the correct required specification for the "Impervious fill Material"?

Plan sheet No. 03.01 is the more restrictive of the two and also meets the requirements of the specification.

This response has been Revised. See Question 45 for Addendum Revsion

15 Hatch 12/1/2009

The general notes on plan sheet 03.01 under the construction of levee also states "The Clay material shall be rated as Grade 2 (non dispersive in accordance with ASTM D6572 Crumb Test and either ND ND2 as evaluated using ASTM4647 (pin hole Test)". Is furnishing "impervious Fill Material " meeting these testing criteria required? Testing requirements such as the aforementioned ASTM D6572 and ASTM4647 test if required should be addressed and Identified in the " Final Technical Specifications" for clarity on what is "Acceptable material".

Yes, the material must meet the testing requirements stated on sheet 03.01.

This response has been Revised. See Question 45 for Addendum Revsion

16 Hatch 12/1/2009

(50.20.00 and plan sheet 03.01 ) In reference to the Table 1 Materials requirement chart under section 2.1 Materials the roadway Base ( Flexible Base) The Table 1 Material Requirements shows percentages in "% retained". Should this be noted as "Percent Passing" not percent Retained? the same Question would apply to the chart Shown in the " General Notes" Item 50 20 Roadway Base " condition TWO" .

The charts were for Ty E material which will not be used for this project. The Addedum removed the charts.

Hatch Summary of Questions.01.xls 3 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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17 Hatch 12/1/2009

( plan Sheet 06.02 and 6.03 ) In reference to plan sheets 6.02 and 6.03 showing four Cross sections total. Each typical section shows a note "limits of prop top soil" and "limits of pay permanent seeding / fert./veg. watering to be paid under 31.92.01-31.92.02;" both of these notes stop short of the complete grading area that will be disturbed ( impacted) by construction, areas such as the toe drain construction, haul roads, construction access, etc. If any topsoil and seeding is required in these areas will this be paid under bid schedule line item 012 ( 35.41.03 Raise Levee Topsoil) and 007 (31.92.01 seeding perm)?

These are not pay items but subsidiary to each specific item as incidental work. The contractor is discourage from disturbing additional areas outside of the construciton limits.

18 Hatch 12/1/2009

In Referance to the excavation required between the two surfaces " exist ground" and "bench excavation to be paid under 35.41.01"; 1.) can the bench excxavation material be used as levee embankment fill material and placed back into the levee construction or will the "bench excavation" be required to be disposed of off-site? 2.) What is the "Measurment & payment" description for bid item 010 specification 35.41.01 Raise Levee ( Bench Excavation)? 3.) Is the "Measurment & Payment " for this bid item payment for "cut only" with placement paid for under bid item 012 Embankment or is the payment for bid item 010 "cut to fill ( including placement )"? 4.) Does the Quantity of 224,157 CD for bid Item 012 Specification 35.41.02 Raise levee ( Embankment ) include the placement of the "Bench Excavation" Quantity of 169.629 CD? 5.) Is the Quantity of 224,157 CD for bid item 012 Specification 35.41.02 Raise Levee (Embankment) a Quantity representative of import fill "embankment" required to complete the levee construction?

1.) All material being placed back into the levee under embankment will have to meet the embankment specificaitons. The existing material will not meet the specificaion so it will be have to be disposed of. 2.) Description as shown. 3.)

Bench excavation is for excavation (cut) only. All embankment (fill) material is being paid for as Raise Levee Embankment. 4.) Item Raise Levee (Embankment) quantity included the amount of material removed under item Bench Excavation.

5.) The quantity of Raise Levee Embankment is material required to brought into the project. This is a compacted in place quantity.

Hatch Summary of Questions.01.xls 4 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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19 Hatch 12/1/2009

1.) 'Is the Entire Quantity of 224,257 CD identified in bid item 012 specification 35 41 02 Raised Levee (embankment ) to be completely comprised of the Specified "Impervious fill Material"? 2.) (35.41.00 page 15 ) Section 3.4 Fill Operations H Random Fill Variation states "when varying compliance confirmed material types are placed within the embankment fill zone the fill shall be placed as a spectrum with the least pervious at the river-ward extent of the fill zone and the most pervious at the land -ward extent of the fill zone". Please clarify the intent of this specification section as to the required embankmentfill material? 3.) Is the Levee embankment construction to be completely comprised of the specified "Impervious Fill material"? 4.) (35.41.00 page 16) Section 3.4 Fill Operations O. Cement Stabilized Backfill concerning this section of the Technical specificaitons, please identify where cement stabilized Backfill is required for Construction? 5.) Is Cement Stabilized Backfill for Consideration as an alternate application for construction of the levee

1.) Yes. 2.) This is to allow for a variable fill allowances, specifically the placement of salvaged gravel under the bottom lifts of Access roads on the land side as shown on sheet no.

06.02. 3.) Yes. 4.) The cement stabilized backfill was a reference item to abandoning existing structures. All structures will be removed and no cement stabilization will be required for structure abandonment. 5.) No.

20 Hatch 12/1/2009 Is there going to be a line item established for import fill to the job? Item Raise Levee Embankment covers this.

21 Hatch 12/2/2009 Plan sheet 13.02 shows three details for three types of construction Exists.

Which detail / Type of Construction exits is to be constructed under Bid Item 003 Temp Erosion control ( construction Exit)?

The contractor has the option of choosing one of the three types detailed.

22 Hatch 12/2/2009

Plan sheet 6.02 Note 4 states: "salvaged / stockpiled Gravel may be used in the bottom lifts of access Roads". 1.) Is this term "Access Roads" referring to construction of new levee Roads? 2.) What is the minimum lift thickness (depth) for placement of "salvaged Gravel" considered as the " bottom left" for Construction of the "prop 6" Flex Base " Levee Road section? 3.) Will "salvaged Gravel" material be required to meet the specification requirements for specification 50.20.00 roadway Base 2.1 Materials Type B Grade 3 Material?

1.) Access Roads are road connecting to the levee from the land side. Each access road has a plan and profile sheet. 2.) Follow specificaion

50.20.00 for placement of salvaged gravel. 3.)

Only constuction methods

23 Hatch 12/2/2009

Please Clarify the following : is the Material roadway Flex base Type B Grade 3 identified in bid item 020 the Specified material required for construction of the "prop 6' Flex Base " shown on the typical Sections of plan sheets 6.02 and 6.03?

Yes

24 Hatch 12/2/2009

Plan Sheet 03.01 General notes the note item 50.20 Roadway base ( flexible Base) in its entirety differs from the specification 50.20.00 Roadway base requirements. Please clarify the intent of General Note item 50 20 roadway base ( Flexible Base)?

The general note had been revised to remove the requirement of Ty E material which will not be used for this project.

Hatch Summary of Questions.01.xls 5 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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25 Hatch 12/2/2009

Specification 50.20.00 Roadway Base Part 3 construction Methods 3.1 Stockpile states: " The contractor shall stockpile base material temporarily at a compliance confirmed location before delivery to the roadway". 1.)

Does this sentence pertain to "new" or "salvaged" Roadway Base Material?

2.) What is the Compliance Confirmed Location" and where can the "compliance Confirmed Locations" be located, with in the project limits or off-site? 3.) If this sentence refers to the "new Roadway Base Material" ( material Processed / manufactured at a pit or quarry site) is the intent to stockpile material at the pit or Quarry site and would the pit or quarry site be the "Compliance confirmed location" or will "new Roadway base material" be required to be stockpiled on-site prior to placement?

1.) New base for testing. 2.) Compliance confirmed location is a location to be approved by the COR prior to stockpiling of material. 3.) The intent is to have a dedicated stockpile locaiton will be tested and used for this project only.

26 Hatch 12/2/2009

Specification 50.20.00 Roadway Base Part 3 Construction Methods 3.2 Preparation of sub grade or existing Base the Second sentence states " when new Base is required to be mixed with existing base, deliver, place and spread new flexible base in the required amount per station". 1.) What is the Quantity of "New flexible Base" that will be required to construct the "Prop 6" Flex Base" section for the Levee Road construction? 2.) Will the placement (reuse) of the Roadway Base material obtained from "salvaged / Stockpiled gravel be paid for under bid Item 020 Roadway Flex Base Type B Grade 3? 3.) Does the Quantity of 26,119 CD for Bid item 020 Roadway flex Base Type B grade 3 include the Quantity of 20,582 Cod for Salvaged Exist Gravel identified in Bid Item 006 Remove/ Stockpile Exist Gravel?

1.) All material will be new base. 2.) No see question no.19 & 22. 3.) No.

27 Hatch 12/2/2009

Specification 50.20.00 Roadway Base Part 3 Construction Methods 3.6 curing states "The contractor shall cure the finished section until the moisture content is at least two percentage points below optimum before applying the next successive course of prime coat". 1.) What is the maximum allowable lift thickness ( depth) for installation of Roadway Flex Base Type B Grade 3? 2.) Is a "Prime Coat" application required for Roadway Base?

1. 6 inches 2.) No.

Hatch Summary of Questions.01.xls 6 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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28 Hatch 12/8/2009

Item 35 43 00 TOE DRAIN, states "For the gravel, the material should be composed of at least 90% silica or other material insoluble in hydrochloric acid." Meaning no limestone should be used. This requirement is usually specified when the leachate is anticipated to be acidic in nature and could decompose carbonate aggregate. This should not be the case for the levee water seepage. Limiting the aggregate to acid insoluble sources would prohibit other sources that would otherwise serve the purpose and make the construction more expensive. Can the use of any clean hard, durable rock meeting the requirements of ASTM C 33 for L.A. Abrasion and soundness be allowed

The material specificaion will remain as is.

29 Hatch 12/8/2009

31.14.00 Remove / Stockpile Existing materials Part 4 Measurement And Payment 4.1 Measurement states "This work will be measured by the cubic yard for removal and stockpile of existing gravel and topsoil, by the square yard for removal and stockpile of existing gravel and top soil, by the square yard for removal and stockpile of existing rock rip rap"

Not a question

30 Hatch 12/8/2009

1.) What are the quantities of Topsoil and Rock Rip Rap to be removed and stockpiled and how will the contractor be paid for these items of work without designated bid items? 2.) Bid Item 013 Rip Rap (Concrete) 222 CD Please provide a detail showing the required installation including dimensions (thickness of concrete) and size of rip rap with embedment detail? 3.) Is salvaged rip rap to be used for construction of this bid item?

1.) The quantity of top soil and Riprap removal are zero. 2.) See sheet no 11.02 3.) No.

31 Hatch 12/8/2009

Specification 01.57.00 Temporary Erosion Sedimentation And Environmental Controls Part 1 General 1.3 Environmental Monitor.

1.) Is the Field Environmental Monitor required to be present on the project on a full time basis? 2.) How will the contractor be paid for providing this monitoring service?

See Question 08

Hatch Summary of Questions.01.xls 7 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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32 Hatch 12/8/2009

Specification 01.57.00 Temporary Erosion Sedimentation And Environmental Controls Part 4 Measurement And Payment 4.1 Measurement 4.2 Payment.

The following items of work are identified for measurement and payment but do not have corresponding bid items on the bid schedule: Rock Filter Dams, Temporary Pipe Slope Drains, Baled Hay, Temporary Paved Flumes, Earthwork For Erosion And Sediment Control and Wetlands Mitigation Construction.

1.) Are these SWPPP BMP items of work required to be constructed on this project? Specification 01.57.00 Temporary Erosion Sedimentation And Environmental Controls Part 3 Construction Requirements Contractor Responsibilities Storm Water Pollution Prevention Plan. 2.) How will the contractor be paid for providing, implementation, inspection and maintenance of the Storm Water Pollution Prevention Plan?

1.) Only items identified on SW3P sheets and itemized for payment will be required. 2.) As per pay items.

33 Hatch 12/8/2009

Project designed work interfaces with the BNSF Railroad infrastructure and encroaches on the BNSF Railroad right of way at approximate Station 1344.

What are the requirements for construction within the BNSF Railroad right of way?

What are the requirements for Railroad Protective Liability Insurance for work conducted adjacent to and within the BNSF Railroad right of way?

No construction will occur in the Railroad right of way

Hatch Summary of Questions.01.xls 8 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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34 Hatch 12/8/2009

The following locations along the project alignment interface and encroach on the New Mexico Department of Transportation right of way:

Sta 1028+00 to Sta 1029+00 State Hwy US 154, Sta 1121+00 to Sta 1122+00 State Hwy 187, Sta 1228+00 to Sta 1230+00 State Hwy 26, Sta 1344 to Sta 1349 State Hwy US 154 and Sta 1516 to Sta 1518 State Hwy 140.

Have all temporary construction easements been acquired and “right of way” access permits been obtained from the New Mexico Department Of Transportation for construction in these areas?

Will the contractor be allowed access to the project site from these interface points (State Highway Right Of Ways)?Has all temporary construction easements, permanent easements and right of way been acquired for construction of this project?

The roadways and bridges are on IBWC ROW and no access permits are required.

35 Hatch 12/8/2009

Specification 01.19.00 Scope Of Work Part 1 General 1.8 Work Restrictions C. Cutting the Levee for Structure Improvements states “This work may not be performed during hurricane season or periods of known heavy rains or floods”.

Please define the known established dates of “hurricane season”?

Please provide the regional weather data which establishes the time period to be considered as “known heavy rains or flooding” periods?

The 2010 Hurrican season will start June 1 and end November 30.

36 Hatch 12/8/2009

Please identify and provide detailed description of the project work that is considered as “Structure Improvements”?

Is the Levee benching excavation and Levee embankment construction to be considered as “Structure Improvements”?

Structure Improvement are work to the drainage and irrigation structures. Levee benching and excavation is not structural improvements.

Hatch Summary of Questions.01.xls 9 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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37 Hatch 12/8/2009

General Wage Decision NM20080001 dated 10/16/2009 NM1 Please provide interpretation of the following questions concerning the “Wage Decision” classification for “Truck Driver” on this project.

Will the truck drivers of trucks hauling site excavated material or debris from the project site for disposal at an off-site location be required to be paid the hourly wage for truck drivers established in the project General Wage Decision?

Will the truck drivers of trucks hauling site excavated material to stockpiles on the project site required to be paid the hourly wage for truck drivers established in the project General Wage Decision?

Will the truck drivers of trucks hauling aggregates (roadway base course or toe trench aggregate), embankment material (soils) or concrete be required to be paid the hourly wage for truck drivers established in the project General Wage Decision?

IBWC contractual Issue and Respone

38 Hatch 12/8/2009

.In the “Table of Contents” for the Technical Specifications, in Division 60, there is listed a specification section 60 10 00 “Excavation and Backfill for Structures”. However, that specification section does not appear in our Bid Documents. Are we missing something, or was this section left out of the Bid Documents?

This is subsidiary item therefore no Line Item Numbers will exist for this specification.

39 Hatch 12/9/2009

Specification 35.41.00 Construction Of Levee 1.4 Access, Haul Roads, Routing And Staging C Permanent Roads Used As Haul Roads states “Permanent roads used as haul roads shall be maintained throughout the duration of use and shall be restored to the pre-construction condition or the intended construction condition”. 'Please define what is required to restore haul roads to “the intended construction condition”?

The intended construction condition is the condition equal to or better of the road prior to construction.

40 Hatch 12/10/2009

Please define what will be required as “maintenance” of haul roads during the duration of use?

What agency will be responsible for evaluating the structural integrity and the existing condition of pavements of “Permanent Roads” used as haul roads?

Maintenance of the road will work necessary to keep the road in its intended construction condition. The owner agency.

41 Hatch 12/11/2009

How will the contractor be compensated for the maintenance and restoration of “Permanent Roads” used as haul roads?

What are the work limits (distance from the project) of “Permanent Roads” the contractor will be responsible for providing maintenance and restoration work?

The contractor will not be conpensinsated for restoration of of the haul roads.

Hatch Summary of Questions.01.xls 10 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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42 Hatch 12/12/2009

Specification 35.41.00 Construction Of Levee, 1.10 Protection Of Existing Features And Ongoing Or Completed Construction D.

Public Roads, Accesses And Appurtenances states “The Contractor shall plan and complete the necessary efforts to protect public roads, accesses and appurtenances from damages associated with this construction project”.

Does this sentence pertain to public roads and access abutting the project work?

Yes and cross roads

43 Hatch 12/13/2009

Accesses And Appurtenances states “Vehicular Load Limits on the existing roads and bridges shall be coordinated with the appropriate governing entity and the Contractor shall comply with the load limits”.

What are the local “Vehicle Load Limits” for public roads and bridges impacted by this construction project?

What is meant by “shall be coordinated with the appropriate governing entity”?

The contractor is responsible for verifying this himself. The governing entity is the owner of the roadway.

44 Hatch 12/14/2009 What agency will be responsible for evaluating the structural integrity and existing conditions of the pavements and bridges prior to the commencement of construction?

The owner of the facility.

45 Hatch 12/8/2009

Impervious Fill: On the General Notes in Plans (Items 35 41) it states that the liquid limit shall not exceed 45, but the specifications (Page 35.41.00-7, Part 2.1.A(1)) states that the maximum liquid limit is 75 %.

Liquid Limit is generally not expressed as a percent. Please clarify.

Impervious Fill: On the General Notes in Plans (Items 35 41) it states that the PI shall be between 15 and 30, but the specifications (Page 35.41.00-7, Part 2.1.A(1)) states that the PI greater than or equal to 45 %. Plasticity Index is generally not expressed as a percent. Please clarify.

Impervious Fill: On the General Notes in Plans (Items 35 41) it states that 76% of the fill material shall pass the #200 sieve, but the specifications (Page 35.41.00-7, Part 2.1.A(1)) states that 75% of the material shall pass the #200 sieve. Which is the correct percentage?

This will be changed by addendum to read:

Impervious material shall consist of fine-grained materials of low permeability consisting of a lean clay (CL).

Impervious material shall be free of crushed rock, debris, plant growth, roots and humus, including hazardous and regulated solid waste. The Plasticity Index shall be greater than 15 and less than 30.. The Liquid limit shall not exceed 45.

Gradation shall consist of 100% of the dry material shall passing the 3 inch sieve and 50% passing the #200 sieve. The clay material shall be rated as Grade 2 (non-dispersive in accordance with ASTM D 6572 (Crumb Test) and either ND or ND2 as evaluated using ASTM D 4647 (Pin Hole Test

Hatch Summary of Questions.01.xls 11 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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46 Hatch 12/8/2009

Roadway Base: On the General Notes in Plans (Item 50 20) it shows the percent retained table of 0, 20-60, 40-75, 75-85 in the chart, but the specifications in Table 1 on Page 50.20.00-3 show different % retained.

Which governs?

These are two different base types and TY D had been delete from the plans.

47 Hatch 12/8/2009

Sheet 11.02 labeled Miscellaneous Levee Detail indicates “final grading under bridge” is to be paid in equipment hours via item 158 special excavation however this item is not on the bid schedule. Please clarify.

The note will be removed in addendum.

48 Hatch 12/8/2009

Are the geotechnical Reports by Raba-Kistner Consultants, Inc. listed in section 00.31.32 and the geotechnical reports by Professional Services Industries Inc. listed in section 35.41.00 the same?

No. 35.41.00 will be revised in addendum.

49 Hatch 12/8/2009

Item 50.20 (Roadway Base) on drawing Sheet 03.01 requires a caliche material meeting specifications of Type B Grade 3. Specification 50.20 describes Type B material to be crushed or uncrushed gravel. Is caliche material required for base course?

The Roadway Base gradation table shown on drawing Sheet 03.01 is incomplete; please provide the sieve sizes that correspond to the percent retained.

On drawing sheet 03.01, the Roadway Base notes refer to Texas standards;

in specification section 50.20 the requirements for Roadway Base are based on ASTM and AASHTO standard tests. As this project is in New Mexico, will the commonly used ASTM and AASHTO standards prevail?

The requirements for impervious material on drawing Sheet 03.01 and those in Specification Section 34.41.00 (page 7) differ significantly.

Please clarify the requirements for impervious materials to be used in Levee construction.

Sheet No. 3.01 will be revised per addendum.

Type B grade 3 flexible base material will meet specification item 50 20.

Hatch Summary of Questions.01.xls 12 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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50 Hatch 12/8/2009

Specification 35.41.00, Part 4, Measurement and Payment, states “The work for the Bid Items under this Specification will be measured by the cubic yard complete in place using the average end area method. The measurement will consist of deducting the existing levee to the enlarged levy (sic).” This measurement would not capture all of the work required and conflicts with the Bid Items given (Line item No’s 010, 011, and 012). Please clarify how these contract items will be measured.

Specification 34 41 00 will be revise in addendum.

The layers will be paid as shown in typical sections.

51 Hatch 12/8/2009

14. Reference: Drawings 6.02 and 6.03, Levee Typical Sections: The area shown as Embankment, paid under item 35.41.02. Is this entire area to be constructed using the specified impervious material in all locations, elevations and sides of the Levee?

Yes

52 Hatch 12/8/2009

This message is sent regarding the Specification 60 69 00, Sluice Gate Maintenance, in the above-referenced projects. We have the following concerns:

1. It seems that the existing gates on these projects are from different manufacturers. We will require a list of the manufacturer of each gate to know who to contact.

2. It is difficult at this time to determine the condition and the scope of the maintenance required at each individual gate. We request that the specification describe exactly what the Government wants done to each gate to be able to have the manufacturers give us a price for the work.

In lieu of the above information, we believe it would be better if this work be handled as an allowance.

Please let us know if this is something that may be considered?

The contractor shall their own investigation on the gate manufacturer. At a minumum the seals shall be repaired or replaced to conform to 1.4 Performance.

53 Hatch 12/8/2009

What is the process for embankment if the existing material will not stand when trying to key into the levee and, how will the contractor be compensated for the additional work?

No keys are being required for the levee.

Geotechnical investigations have determined that the benching heights are attainable.

Hatch Summary of Questions.01.xls 13 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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54 Hatch 12/8/2009 Is the owner responsible for the water that may leak from existing irrigation ditches that are very near the Right-of-Way and in poor condition?

Existing irrigation ditches will not be disturbed. If contractors operations damage the irrigation facilities then the contractor will be responsible for the repair at the contactor's expense.

55 Hatch 12/8/2009

Will the contractor be reimbursed for work stoppages caused by adjacent landowner disputes regarding fences, ditches, and structures that will be affected by the project?

No stoppages are anticipated for this project. No additional reinburstment shall be made.

56 Hatch 12/8/2009 Who is responsible for the cost of replacing the fences and ditches that are to be removed because they encroach on the project right-of-way? Encroaching fences will not be replaced.

57 Hatch 12/8/2009

Specification 35.41.00 2.1A (1)

a. Impervious material shall have a plasticity index of less than or equal to 45%. Plasticity index is not usually a percentage. Could you clarify?

b. The spec. continues, “…and a minimum amount passing a Standard No.

200 sieve of 75%. Acceptable impervious material will be CL and CH as classified in accordance with ASTM D2487.” Does this mean that if the material complies with either of these two requirements it is acceptable?

See Question 45.

58 Hatch 12/8/2009

Specification 35.43.00 2.1, regarding the Toe Drain gravel which is to meet the ASTM C33 No. 57 or 67 states: “The percent passing the No.

200 sieve should be zero. Zero percent passing on the No. 200 sieve on a project that requires over 71,000 cubic yards of drain rock appears unattainable.

The material must be free draining and free of silts.

59 Hatch 12/8/2009 The plans show silt fence at the tow of the existing on the floodway side of the levee. Is it acceptable to place the silt fence in a location that will allow for a haul road from the tow of slope out?

Yes the placement of the silt fence is to capture runoff from disturbed soils.

60 Hatch 12/8/2009

Section F-2 52.211.10 States the levee improvements, excluding seeding and maintenance of vegetation, shall be completed in 245 days. Is this correct?

No, the duration is 300 days as shown in Specification 0019 in addendum.

61 Hatch 12/8/2009

Is it possible to do some test hole near the existing irrigation ditches to assess the soil conditions near them so an accurate estimate for the excavation of the Toe Trench is possible?

IBWC's call.

Hatch Summary of Questions.01.xls 14 of 15

Project: Rehabilitation of Improvements for the Rio Grande Canaliztion Protective Leeve System

Task Order IBM09T0030 S&B Infrastructure, Ltd.

Client IBWC BIDDER QUESTIONS SUMMARY Updated: 12/09/09

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62 Hatch 12/8/2009 Are there areas of the levee that must remain open to traffic for the landowners that use the levee as access to the adjacent lands and if so can they be identified?

Yes at access driveways shown on the plan and profile sheets.

63 Hatch 12/8/2009 Romero Excavating &

Trucking, Inc.

1. 'Do we have to establish our own SWPPP plan? If so where does the cost of the SWPPP get included?

Provided for in Plans, see Erosion Control Sheets

64 Hatch 12/8/2009 Romero Excavating &

Trucking, Inc.

2. 'The specifications for the project have a different contract number and is this the right set of specifications for the job we are bidding?

Specifications have Desgin Contract Number

65 Hatch 12/8/2009 Romero Excavating &

Trucking, Inc.

3. Does the Embankment Qty. include a shrink factor? If not what is the percentage of shrink factor to use for the adjustment?

No, payment is compacted in place with no shrinkage adjustment.

66 Hatch 12/8/2009 Romero Excavating &

Trucking, Inc.

4.For Specification section 01.57.00 it says that on page 4 part 2.1 that the contractor is to provide one or more requirements. The bid schedule has bid item 2 & 3 so do these bid items fulfill the requirement for the spec?

Only if the contractor follows the SW3P sheets.

67 Hatch 12/8/2009 Romero Excavating &

Trucking, Inc.

5. There are other items included in the specification 01.57.00 part 4.2 on page 15 do we include them if needed in bid items 2 & 3? Or is there going to be additional bid items established?

Only the items called for as pay items will be requried if the contractor follows the SW3P sheets.

68 Hatch 12/8/2009 Romero Excavating &

Trucking, Inc.

6. Bid Item 3, Do we choose our own type of construction exits and entrances? Or is there a specific type that the IBWC is wanting?

Yes, any of the tree types in the plans are acceptable.

69 Hatch 12/8/2009 Romero Excavating &

Trucking, Inc.

7.Bid Item 7, Can permanent seeding take place if one area of the project is completed? Or do we seed until the entire project is completed? Yes

70 Hatch 12/8/2009 Romero Excavating &

Trucking, Inc.

8. Is there going to be a Temp seeding item established? Or do we include the temp seeding in the permanent seeding item?

No, Include with permanent seeding

71 Hatch 12/8/2009 Skanska USA Civil

West RMD In situations where the bench excavation actually requires a fill to construct can this be done with material excavated from an adjacent

All bench execavation is into existing material.

72 Hatch 12/8/2009 Skanska USA Civil

West RMD

Can the material excavated from the benches be used on the land side of the levees or does the entire embankment have to meet the clay specification.

The entire embankment must meet the clay specification.

Hatch Summary of Questions.01.xls 15 of 15