Supplimental Specifications.pdf

San Juan National Forest Hermosa Creek Improvement Project 2011 Supplemental Project Specifications

Table of Contents

Table of Contents Preface 101 - Terms, Format, and Definitions 102 - Bid, Award, and Execution of Contract 103 - Scope of Work 104 - Control of Work 105 - Control of Material 106 - Acceptance of Work 107 - Legal Relations and Responsibility to the Public 108 - Prosecution and Progress 109 - Measurement and Payment 151 - Mobilization 155 - Schedules for Construction Contracts 156 - Public Traffic 201 - Clearing and Grubbing 204 - Excavation and Embankment 625 - Turf Establishment 635 - Temporary Traffic Control

Preface

Preface_wo_03_15_2004_m

Delete all but the first paragraph and add the following:

The Forest Service, US Department of Agriculture has adopted FP-03 for construction of National Forest System Roads.

101 - Terms, Format, and Definitions

101.00_nat_us_07_25_2005

101.01_nat_us_02_17_2005

101.01 Meaning of Terms.

Add the following:

Delete all references in FP-03 to Transportation Acquisition Regulations (TAR).

101.03_nat_us_06_16_2006

101.03 Abbreviations.

Add the following to (a) Acronyms:

AFPA

MSHA

NIST

NESC

WCLIB

American Forest and Paper Association Mine Safety and Health Administration National Institute of Standards and Technology National Electrical Safety Code West Coast Lumber Inspection Bureau

Add the following to (b) SI symbols:

mp Milepost ppm Part Per Million

101.04_nat_us_06_16_2006

101.04 Definitions.

Delete the following definitions and substitute the following:

Bid Schedule--The Schedule of Items.

Bridge--No definition.

Contractor--The individual or legal entity contracting with the Government for performance of prescribed work. In a timber sale contract, the contractor is the “purchaser”.

Culvert--No definition.

Right-of-Way--A general term denoting (1) the privilege to pass over land in some particular line (including easement, lease, permit, or license to occupy, use, or traverse public or private lands), or (2) Real property necessary for the project, including roadway, buffer areas, access, and drainage areas.

Adjustment in Contract Price--“Equitable adjustment,” as used in the Federal Acquisition Regulations, or “construction cost adjustment,” as used in the Timber Sale Contract, as applicable.

Change--“Change” means “change order” as used in the Federal Acquisition Regulations, or “design change” as used in the Timber Sale Contract.

Design Quantity--“Design quantity” is a Forest Service method of measurement from the FS-96 Forest Service Specifications for the Construction of Roads and Bridges.

Under these FP specifications this term is replaced by the term “Contract Quantities”.

Forest Service--The United States of America, acting through the Forest Service, U.S.

Department of Agriculture.

Neat Line--A line defining the proposed or specified limits of an excavation or structure.

Pioneer Road--Temporary construction access built along the route of the project.

Purchaser--The individual, partnership, joint venture, or corporation contracting with the Government under the terms of a Timber Sale Contract and acting independently or through agents, employees, or subcontractors.

Protected Streamcourse--A drainage shown on the plans or timber sale area map that requires designated mitigation measures.

Road Order--An order affecting and controlling traffic on roads under Forest Service jurisdiction. Road Orders are issued by a designated Forest Officer under the authorities of 36 CFR, part 260.

Schedule of Items--A schedule in the contract that contains a listing and description of construction items, quantities, units of measure, unit price, and amount.

Utilization Standards--The minimum size and percent soundness of trees described in the specifications to determine merchantable timber.

Add Figure 101-1—Illustration of road structure terms:

Figure 101-1—Illustration of road structure terms.

R ig ht o f -

W a y R oa d si d e R oa d si d e

C le a rin g W id th

R o ad w ay C le a rin g

L im it X

Y

G ro un d

L in e

T ra ve le d W a y

C L B e rm

S u rf a ce C o u rs e

B as e C o ur se

F ill

S lo p e

B a ck S lo p e

D ra in a g e

D itc h

G ro u n d L in e

S u bg ra de

R o ad B e d

S h a p e s an d di m e n si o n s w ill v a ry to fi t lo ca l c on di tio n s.

S e e d ra w in g s fo r ty p ic a l s ec tio ns

X a n d

Y d e n ot e cl e a rin g o u ts id e o f ro ad w ay

N ot e

Right - of - Way Line

Right - of - Way Line

Clearing Limit

Shoulder

Shoulder

102 - Bid, Award, and Execution of Contract

102.00_nat_us_02_16_2005

102 Bid, Award, and Execution of Contract

Delete Section 102 in its entirety.

103 - Scope of Work

103.00_nat_us_02_16_2005

Deletions

Delete all but subsection 103.01 Intent of Contract.

104 - Control of Work

104.00_nat_us_06_16_2006

Deletions

Delete Sections 104.01, 104.02, and 104.04.

104.06_nat_us_02_17_2005

Add the following subsection:

104.06 Use of Roads by Contractor

The Contractor is authorized to use roads under the jurisdiction of the Forest Service for all activities necessary to complete this contract, subject to the limitations and authorizations designated in the Road Order(s) or described in the contract, when such use will not damage the roads or national forest resources, and when traffic can be accommodated safely.

105 - Control of Material

105.02_nat_us_01_18_2007

105.02 Material Sources.

105.02(a) Government-provided sources.

Comply with the requirements of 30 CFR 56, subparts B and H. Use all suitable material for aggregate regardless of size unless otherwise designated. When required, re-establish vegetation in disturbed areas according to section 625.

105.05_nat_us_05_12_2004

105.05 Use of Material Found in the Work.

Delete 105.05 (a) and (b) and the last sentence of the second paragraph and substitute the following:

Materials produced or processed from Government lands in excess of the quantities required for performance of this contract are the property of the Government. The Government is not obligated to make reimbursement for the cost of producing these materials.

106 - Acceptance of Work

106.01 Conformity with Contract Requirements.

Delete (a) and (b) and substitute the following:

(a) Disputing Government test results. If the accuracy of Government test results is disputed, promptly inform the CO. If the dispute is unresolved after reasonable steps are taken to resolve the dispute, further evaluation may be obtained by written request. Include a narrative describing the dispute and a proposed resolution protocol that addresses the following:

(1) Sampling method;

(2) Number of samples;

(3) Sample transport;

(4) Test procedures;

(5) Testing laboratories;

(6) Reporting;

(7) Estimated time and costs; and

(8) Validation process.

If the evaluation requires additional sampling or testing be performed, mutually agree with the Government on witnessing procedures and on sampling and testing by a third party laboratory. Use a third party laboratory accredited by the AASHTO accreditation program. Provide proof of the laboratory’s accreditation for the test procedures to be used. Do not use the same laboratory that produced the disputed Government test results or that produced the test results used as a basis for the dispute.

The CO will review the proposed resolution protocol and may modify it before final approval and execution.

The Government will use the approved resolution protocol test results to determine the validity of the disputed testing. If the Government test results are validated, the Contractor will be responsible for all costs associated with developing and performing the resolution protocol. If the Government test results are not validated, the Government will be responsible for all costs associated with developing and performing the resolution protocol. If the validity of the Government test results cannot be determined, the Contractor and Government will equally share all costs associated with developing and carrying out the resolution protocol.

(b) Alternatives to removing and replacing non-conforming work. As an alternative to removal and replacement, the Contractor may submit a written request to:

(1) Have the work accepted at a reduced price; or

(2) Be given permission to perform corrective measures to bring the work into conformity.

106.05 Delete

Delete subsection 106.05.

106.07 Delete

Delete subsection 106.07.

107 - Legal Relations and Responsibility to the Public

107.05 Responsibility for Damage Claims.

Delete the entire subsection.

107.06 Contractor’s Responsibility for Work.

Delete the following from the first paragraph.

“except as provided in Subsection 106.07”.

107.09 Legal Relationship of the Parties.

Delete the entire subsection.

107.10 Environmental Protection.

Add the following:

Design and locate equipment repair shops, stationary refueling sites, or other facilities to minimize the potential and impacts of hazardous material spills on Government land.

Before beginning any work, submit a Hazardous Spill Plan. List actions to be taken in the event of a spill. Incorporate preventive measures to be taken, such as the location of mobile refueling facilities, storage and handling of hazardous materials, and similar information. Immediately notify the CO of all hazardous material spills. Provide a written narrative report form no later than 24 hours after the initial report and include the following:

Description of the item spilled (including identity, quantity, manifest number, and other identifying information).

Whether amount spilled is EPA or state reportable, and if so whether it was reported, and to whom.

Exact time and location of spill including a description of the area involved.

Containment procedures.

Summary of any communications the Contractor had with news media, Federal, state and local regulatory agencies and officials, or Forest Service officials.

Description of clean-up procedures employed or to be employed at the site including final disposition and disposal location of spill residue.

When available provide copies of all spill related clean up and closure documentation and correspondence from regulatory agencies.

The Contractor is solely responsible for all spills or leaks that occur during the performance of this contract. Clean up spills or leaks to the satisfaction of the CO and in a manner that complies with Federal, state, and local laws and regulations.

108 - Prosecution and Progress

108 Delete.

Delete Section 108 in its entirety.

109 - Measurement and Payment

109 Deletions

Delete the following entire subsections:

109.06 Pricing of Adjustments.

109.07 Eliminated Work.

109.08 Progress Payments.

109.09 Final Payment.

109.02 Measurement Terms and Definitions.

(b) Contract quantity.

Add the following:

Contract quantities will be adjusted only when there are errors in the original design of 15% or more.

Change the following:

“(b) Cubic yard” to “(c) Cubic yard”.

Add the following definition:

(p) Thousand Board Feet (Mbf). 1,000 board feet based on nominal widths, thickness, and extreme usable length of each piece of lumber or timber actually incorporated in the job. For glued laminated timber, 1,000 board feet based on actual width, thickness, and length of each piece actually incorporated in the job.

151 - Mobilization

Description

151.01.

Add the following:

Noxious weed control requirements:

Clean all construction equipment prior to entry onto the project area. Remove all dirt and plant parts and material that could carry noxious weed seeds into the project area. Only construction equipment so cleaned and inspected by the Forest Service will be allowed to operate within the project area. Treat all subsequent move-ins of construction equipment in the same manner as initial move-ins. “construction equipment” does not include personal vehicles, paving equipment or support equipment that remains on the main travel route.

Prior to the initial move-in, the contractor shall make all construction equipment available for inspection by the Forest Service at an agreed upon location. Provide the Forest Service at least 24 hours advance notification when equipment is ready for inspection

Payment

151.03

Add the following to the first paragraph:

Include all costs associated with the cleaning of equipment in the unit bid price for Mobilization:

Add the following to the beginning of paragraph (a).

If applicable, 155 - Schedules for Construction Contracts

155.00_nat_us_05_11_2004

155 Delete.

Delete Section 155 in its entirety.

156 - Public Traffic

Delete Section 156 in its entirety and replace with the following:

156.01 This work consists of controlling and protecting public traffic adjacent to and within the project.

Material

156.02 Conform to the MUTCD and the following Section:

Temporary traffic control 635

Construction Requirements

156.03 Accommodating Traffic During Work. Perform no work that interferes or conflicts with traffic or existing access to the roadway surface until a traffic control plan in accordance with MUTCD Part 6A.01 has been approved. Post construction signs and traffic control devices in conformance with MUTCD. Assure that all required signs are in place and approved prior to beginning work on project.

Do not construct detours outside of the clearing limits or use alternate route detours without the approval of the CO.

Keep existing roads open to all traffic during road improvement work, and maintain them in a condition that will safely and adequately accommodate traffic. Delays may not exceed 60 minutes at any one time followed by an open period of no less than 10 minutes. The open periods shall be routinely scheduled at the beginning of each hour through the working day. More specific closure or traffic accommodations will be

SHOWN ON THE PLANS.

156.04 Temporary Traffic Control. Install and maintain temporary traffic control devices adjacent to and within the project as required by the approved traffic control plan and the MUTCD. Install and maintain traffic control devices as follows:

(a) Furnish and install traffic control devices before the start of construction operations.

(b) All detours outside of clearing limits shall be approved in writing by the Contracting Officer as part of the traffic control plan.

(c) When required, use flaggers certified by the American Traffic Safety Services Association, the National Safety Council, the International Municipal Signal Association, a state agency, or other acceptable organization. Perform the work described under MUTCD Part 6E. Use type III, VII, VIII, or IX retroreflective sheeting on flagger paddles. Do not use flags. Flaggers must wear high visibility safety apparel as required by MUTCD 6E.02.

156.05 Temporary Closures. Road segments may be closed as SHOWN ON THE PLANS. Maintain traffic control devices during closure periods. Erect and maintain appropriate barricades and signs as shown in the traffic control plan.

Prior to closing roads during construction, give written notice to the Contracting Officer at least 14 days in advance to allow for proper notice to the public.

156.06 Acceptance. Public traffic work will be evaluated under Subsection 106.02.

Measurement and Payment

156.07 Do not measure Public Traffic for payment. Compensation is made as an indirect payment.

201 - Clearing and Grubbing

Section 201—Clearing & Grubbing

Delete this section in its entirety and replace with the following:

201.01 Work. Clear and grub; treat timber, construction slash, and debris; and preserve vegetation and objects designated to remain free from injury or defacement.

201.02 Clearing & Grubbing. Clear and grub in accordance with the following:

(a) Exceptions. Within the clearing limits, clear and treat trees, debris, stumps, roots, and other protruding vegetative material not designated to remain, except the following:

(1) Undisturbed stumps outside the roadway or in embankment areas, provided they do not extend more than 12 inches above the original ground (measured from the uphill side); they are no closer than 24 inches to the finished subgrade or 12 inches to any slope surface, or as otherwise SHOWN ON THE PLANS; and they do not interfere with the placement or compaction of embankments.

(2) Material in channel changes, rock sections, and ditches that is below the depth of the proposed excavation.

(3) Uncut vegetation less than 3 feet in height and less than 3 inches in diameter, that is within the clearing limits but beyond the roadway and not in a decking area, and that does not interfere with sight distance along the road.

(b) Performance. Grub all roots over 3 inches in diameter within the roadbed area to a minimum depth of 6 inches below subgrade. Cut flush with the excavated road surface all roots over 3 inches in diameter that protrude from the excavated slope.

Clear slash treatment areas and treat debris in accordance with Subsections 201.02(a) and 201.05.

Clear decking areas and treat debris in accordance with Subsection 201.05. Unless otherwise SHOWN ON THE PLANS, fell trees into the area being cleared when ground conditions, tree lean, and shape of clearing permit.

Use controlled felling to ensure the direction of fall to prevent damage to property, structures, trees designated to remain, and traffic.

Dead trees over 6 inches in diameter measured 12 inches above the ground that lean toward the road and are sufficiently tall to reach the roadbed are designated for cutting.

Fell hazard trees or unstable live trees that are tall enough to reach the roadbed, when marked, before felling timber in the immediate clearing vicinity.

Maximum stump height is 12 inches or one-third of the stump diameter, whichever is higher, measured on the side adjacent to the highest ground, and treat them no further unless otherwise SHOWN ON THE PLANS.

Trim branches on remaining trees or shrubs to give a clear height of 16 feet above the roadbed, unless otherwise SHOWN ON THE PLANS. Trim tree limbs as near flush with the trunk as practicable.

201.03 Utilization of Timber. Merchantable timber is timber that meets Utilization Standards. There is no merchantable timber located in these projects.

(a) Felling & Bucking. Fell trees to minimize damage to merchantable timber and to remaining trees located outside of clearing limits. Fell trees with saws or shears unless shown otherwise.

(b) Utilization & Removal of Timber. Dispose of unmerchantable timber in accordance with Subsection 201.05 by the treatment methods SHOWN ON THE PLANS and designated in the SCHEDULE OF ITEMS.

201.04 Pioneer Roads. During pioneering operations, prevent undercutting of the final excavation slope. Avoid any restriction of drainages while pioneering the road.

Keep all materials within the roadway limits unless otherwise SHOWN ON THE

PLANS.

201.05 Slash Treatment. Use or treat construction slash larger than 3 inches in diameter and 3 feet in length by one or more of the following methods, as designated in the

SCHEDULE OF ITEMS:

(1) Windrowing construction slash.

(2) Windrowing large material.

(3) Windrowing and covering.

(4) Scattering.

(5) Burying.

(6) Chipping or grinding.

(7) Piling and burning.

(8) Decking unmerchantable material.

(9) Placement in cutting units.

(10) Removal.

(11) Piling.

(12) Placing slash on embankment slopes.

(13) Debris mat.

Pieces of wood less than 3 inches in diameter and 3 feet in length may be scattered within the clearing limits.

(a) All Methods. Construction slash placement will not be allowed in lakes, meadows, streams, or streambeds. Immediately remove construction slash that interferes with drainage structures.

Fell and dispose of trees that are scorched or damaged beyond recovery, and adjacent to the clearing limits, in accordance with Subsection 201.03; or treat these trees as construction slash.

(b) Specific Methods. When using one or more of the following slash treatment methods, meet requirements specified below:

(1) Windrowing Construction Slash. Clear areas to accommodate the windrow slash.

Place construction slash outside the roadway in neat, compacted windrows laid approximately parallel to and along the toeline of embankment slopes. Do not permit the top of the windrows to extend above the top of subgrade. Use construction equipment to matt down all material in a windrow to form a compact and uniform pile. Construct breaks of at least 16 feet at least every 200 feet in a windrow. Do not place windrows against trees. A pioneer road may be constructed to provide an area for placement of windrows, provided the excavated material is kept within the clearing limits and does not adversely affect the road construction.

(2) Windrowing Large Material. Windrow construction slash that is 10 inches or more in diameter at the small end, and 7 feet or more in length, as specified in Subsection 201.05(b)(1). Treat smaller material by one or more of the other included methods for slash treatment.

(3) Windrowing & Covering. Place and compact construction slash as specified in Subsection 201.05(b)(1), and cover with at least 6 inches of rock and soil to form a smooth and uniform windrow.

(4) Scattering. Scatter construction slash outside the clearing limits without damaging trees. Limb all logs. Place logs and stumps away from trees, positioned so they will not roll, and are not on top of one another. Limb and scatter other construction slash to reduce slash concentrations.

(5) Burying. Bury construction slash at the locations SHOWN ON THE PLANS and designated on the ground. Mat construction slash down in layers, and cover it with at least 24 inches of rock and soil. Smooth and slope the final surface to drain.

(6) Chipping or Grinding. Process construction slash that is up to at least 4 inches in diameter and longer than 3 feet through a chipping machine or machine designed and operated to grind slash and stumps into pieces, such as a tub grinder. Deposit chips or ground woody material on embankment slopes or outside the roadway to a loose depth not exceeding 6 inches. Minor amounts of chips or ground woody material may be permitted within the roadway if they are thoroughly mixed with soil and do not form a layer.

(7) Piling & Burning. Deposit construction slash in areas SHOWN ON THE PLANS and designated on the ground. Construct piles so that burning does not damage standing trees. If burning is incomplete, repile and burn the slash remaining until pieces are reduced to less than 3 inches in diameter and 3 feet in length. Scatter the remaining pieces.

(8) Decking Unmerchantable Material. Deck logs that do not meet Utilization Standards specified in Subsection 201.03, and other material that exceeds the diameter and length in areas SHOWN ON THE PLANS. Other locations may be approved by the

CO.

Cut material into lengths not exceeding 32 feet, and remove all limbs. Decks are to be stable and free of brush and soil. Treat other material according to slash treatment methods SHOWN ON THE PLANS and in the SCHEDULE OF ITEMS.

(9) Placement in Cutting Units. Place construction slash from within cutting units and the adjacent 200 feet with cutting unit logging slash. Place construction slash at least 50 feet inside the cutting unit boundary such that it will not inhibit logging of the unit and may be treated by the prescribed logging slash treatment method.

(10) Removal. Remove or haul construction slash to locations SHOWN ON THE PLANS or designated on the ground.

(11) Piling. Pile construction slash in areas SHOWN ON THE PLANS or designated on the ground. Place and construct piles so future burning will not damage remaining trees.

Keep piles reasonably free of dirt from stumps. Cut unmerchantable logs into lengths of less than 20 feet prior to placement in the pile.

(12) Placing Slash on Embankment Slopes. Place construction slash on completed embankment slopes to reduce soil erosion where SHOWN ON THE PLANS. Place construction slash as flat as practicable on the completed slope. Place slash from the toe of the embankment to a point at least 24 inches below subgrade elevation. Priority for use of available slash is for: (1) through fills; (2) insides of curves; and (3) ditch relief outlets.

(13) Debris Mat. Use tree limbs, tops, cull logs, split stumps, wood chunks, and other debris to form a mat upon which construction equipment is operated. Place stumps upside down and blend stumps into the mat.

Measurement

201.06 Method. No separate measurement will be made for clearing and grubbing activities required.

Payment

201.07 Basis. No separate payment will be made for any clearing and grubbing activities required. This work shall be considered incidental to other work.

204 - Excavation and Embankment

Construction Requirements

204.06 Roadway Excavation

(a) General.

Add the following:

Retrieve material deposited outside of the clearing limits as directed by the CO. Place unsuitable material in designated areas.

204.06 Roadway Excavation.

Add the following:

(d) Pioneer Roads. Road pioneering, slash disposal, and grubbing of stumps may proceed concurrently with excavation. Conduct excavation and placement operations so material to be treated under Section 201 will not be incorporated into the roadway unless specified in the slash treatment method. Maintain drainage during pioneering operations.

(e) Drainage Excavation. Drainage excavation includes construction of side ditches, minor channel changes, inlet and outlet ditches, furrow ditches, rolling drainage dips, surface water deflectors and other minor earth drainage structures as shown on the plans.

Compaction for drainage excavation is as shown in 204.11.

204.10 Embankment Construction.

Add the following:

Obtain written approval before beginning construction of embankments over 6 feet high at subgrade centerline.

204.10 Embankment Construction.

(b) Embankment within the roadway prism.

Delete section (b) and replace with the following:

Specific Methods. Place all embankments using one or more of the following methods, as listed in the SCHEDULE OF ITEMS:

(1) Method 1—Side Casting & End Dumping. Place embankment by side casting and end dumping. Build solid embankments by working smaller rocks and fines in with the larger rocks and fines to fill the voids.

(2) Method 2—Layer Placement. Roughen or step surfaces steeper than a ratio of 3 horizontal to 1 vertical (3:1) upon which embankment is to be placed, when shown on plans, in order to provide permanent bonding of new and old materials.

Layer place embankment, except over rock surfaces. Over rock surfaces, place material by end dumping to the minimum depth needed for operation of spreading equipment.

Level and smooth each embankment layer before placement of subsequent layers.

Operate hauling and spreading equipment uniformly over the full width of each layer.

Place suitable material in layers no more than 12 inches thick, except when the material contains rock more than 9 inches in diameter, in which case layers may be of sufficient thickness to accommodate the material involved. Ensure that no layer exceeds 2 feet before compaction.

Placing individual rocks or boulders greater than 2 feet in diameter will be permitted, provided that the embankment will accommodate them and that they are at least 6 inches below the subgrade. Carefully distribute rocks and fill the voids with finer material to form a dense and compacted mass.

Where material containing large amounts of rock is used to construct embankments, make layers of sufficient thickness to accommodate the material involved. Construct a solid embankment with adequate compaction by working smaller rock and fines in with the larger rocks to fill the voids, and by operating hauling and spreading equipment uniformly over the full width of each layer as the embankment is constructed.

Ensure that material is at a moisture content suitable to obtain a mass that will not visibly deflect under the load of the hauling and spreading equipment. Field drain and dry excessively wet material that is otherwise suitable for embankment before placement.

(3) Method 3—Layer Placement (Roller Compaction). Place embankments as specified in method 2. Place in horizontal layers not exceeding 12 inches prior to compaction, except when the material contains rock more than 9 inches in diameter, in which case layers may be of sufficient thickness to accommodate the material involved. Obtain compaction using equipment listed in Subsection 204.11(a). Operate compaction equipment over the full width of each layer until visible deformation of the layer ceases or, in the case of the sheepsfoot roller, the roller “walks out” of the layer. Make at least three complete passes.

Method 4—Controlled Compaction. Place embankments as specified in method 2; but place earth embankments in horizontal layers not exceeding 12 inches (loose measure), and compact them. Ensure that the moisture content of material is suitable for attaining the required compaction. Compact the embankments and the top 12 inches of excavation sections to at least 95 percent of the maximum density, as determined by AASHTO T 99, method C or D.

Determine the density of the embankment material during the progress of the work, in accordance with AASHTO T 191, T 205, or T 238; and T 217, T 239, or T 255. Correct for coarse particles in accordance with AASHTO T 224.

Density requirements will not apply to portions of rock embankments that cannot be tested in accordance with approved methods. When this condition exists, accomplish compaction by working smaller rocks and fines in with the larger rocks to fill the voids and by operating equipment over the embankment materials.

(5) Method 5—Side casting, End Dumping, Layer Placement, and Controlled Compaction. Place embankment as specified in Method (1) until the minimum width necessary to operate the spreading equipment is obtained. Place the remainder of the embankment as specified in Method (2) except a minimum depth of 1 foot below subgrade to be placed as specified in Method (3). Embankments otherwise shown on the plans to be entirely placed as specified in Method (3).

204.11 Compaction

Delete the first paragraph and replace it with the following:

For compaction methods according to method (a), (b), or (c), use AASHTO T 27 to determine the amount of material retained on a Number 4 sieve. For compaction methods (d), (e), or (f) no sieve test is required.

Add the following compaction methods:

(d) Hauling and Spreading Equipment. Adjust the moisture content to a level suitable for compaction. Compact the material by operating equipment over the full width of the roadway.

(e) Roller Compaction. Adjust the moisture content to a level suitable for compaction.

Operate Rollers over the full width of each layer until visual displacement ceases, but not fewer than three complete passes. Use rollers that meet the following requirements:

(1) Steel wheeled rollers, other than vibratory, capable of exerting a force of not less than 250 pounds per inch of width of the compression roll or rolls.

(2) Vibratory steel wheeled rollers equipped with amplitude and frequency controls with a minimum weight of 6 tons, specifically designed to compact the material on which it is used.

(3) Pneumatic-tired rollers with smooth tread tires of equal size that will provide a uniform compacting pressure for the full width of the roller and capable of exerting a ground pressure of at least 80 psi.

(4) Sheepsfoot, tamping, or grid rollers capable of exerting a force of 250 lbs/inch of width of roller drum.

(f) Mechanical Tamper. Adjust the moisture content of the backfill material to a moisture content suitable for compaction. Compact each 6 inch layer with a minimum of three complete passes with a mechanical tamper, approved by the CO.

204.12 Ditches.

Add the following:

Construct side ditches, minor channel changes, inlet and outlet ditches, furrow ditches, ditches along the road but beyond roadway limits, drain dips and other minor earth drainage structures as shown on the plans. Utilize excavated material in accordance with Subsection 204.06.

Stake drain dips in a manner that ensures they will be constructed in accordance with the details shown on the plans. Bring the road to grade and have locations approved prior to staking drain dips.

204.13 Sloping, Shaping, and Finishing.

(a) Sloping.

Add the following:

Slope rounding is not required on tolerance class D though M roads.

Delete section (d) and add the following:

(d) Finishing.

For surfaced and unsurfaced roads, use one of the following methods to finish the roadbed:

(1) Method A. Remove all material larger than 6 inches from the top 6 inches of the roadbed and replace with suitable material.

(2) Method B. Use a vibratory grid roller or approved equal with a minimum weight of 10 tons. Roll at least 5 full-width passes or until visible displacement ceases.

(3) Method C. For roads designated as Construction Tolerance Class K, L, or M, finish the roadbed by spreading the excavation. Eliminate rock berms.

Add Table 204-2—Construction Tolerances:

Table 204-2 Construction tolerances.

Tolerance Class(a)

A B C D E F G H I J K L M Roadbed width (ft) +0.5 +0.5 +1.0 +1.0 +1.0 +1.0 +1.5 +1.0 +2.0 +2.0 +2.0 +2.0 +2.0

Subgrade elevation

(ft)

+0.1 +0.2 +0.2 +0.5 +0.5 +1.0 +1.0 +1.5 +2.0 +3.0 +2.0 +3.0 (c)

Centerline alignment (ft)

+0.2 +0.2 +0.5 +0.5 +1.0 +1.0 `+1.5 +1.5 +2.0 +3.0 +3.0 +5.0 (c)

Slopes, excavation, and embankment (% slope(b)

+3 +5 +5 +5 +5 +5 +10 +10 +10 +10 +20 +20 +20

a. Maximum allowable deviation from construction stakes and drawings.

b. Maximum allowable deviation from staked slope measured from slope stakes or hinge points.

c. Unless otherwise shown the centerline alignment and subgrade elevation, as built, have no horizontal curves with a radius of less than 80 feet, and no vertical curves with a curve length of less than 80 feet when the algebraic difference in the grade change is less than 10 percent, or a curve length of less than 100 feet when the algebraic difference of the grade change is greater than or equal to 10 percent. The centerline grade is not to exceed 20 percent in 100 feet of length.

204.14 Disposal of Unsuitable or Excess Material.

Delete the first paragraph and substitute the following:

Dispose of unsuitable or excess material at designated sites or legally off the project.

204.15 Acceptance

Table 204-1 Sampling and Testing Requirements.

Add the following note to the table:

(2) When compaction methods (d), (e) or (f ) are used, AASHTO M 145, T 99, T 180, and T 310 are not required for earth embankment test methods.

625 - Turf Establishment

625.03 General.

Add the following paragraph:

Seeding shall be restricted to the following time frames:

Spring seeding: from spring thaw to July 15.

Fall seeding: from August 1 until consistent ground freeze.

“Spring Thaw” shall be defined as the earliest date in a calendar year in which seed can be buried 13mm (1/2”) into the surface soil through specified seeding methods.

“Consistent Ground Freeze” shall be defined as that time during the fall months in which the surface soil, due to freezing conditions, prevents burying the seed 13mm (1/2”) through specified seeding methods.

Seeding accomplished outside the time periods listed above will be allowed only when approved in writing by the CO.

625.04 Preparing Seedbed.

Delete “2 inches in diameter and larger,” from the second sentence.

625.05 Watering.

Delete the entire subsection

625.07 Seeding.

(b) Hydraulic method.

Add the following :

Seed type and amount of pure live seed shall be as follows:

Common Name lb/ac

Mountain Brome (Bromus marginatus) 8 Slender Wheatgrass ( Elymus trachycaulus) 8 mutton grass (Poa fenderiana) 1 June Grass(Koeleria macrantha) 1 Total lb/ac 18

*PLS = pounds of pure live seed Seeds available from Southwest Seed, 13260 County Road 29 Dolores, CO 81323.

Phone # 970-565-8722

625.08 Mulch:

Add the Following:

Assure that mulch used on the project is certified noxious weed free by the appropriate authority in the jurisdiction of use.

635 - Temporary Traffic Control

635.03 General.

Add the following paragraph:

Supply a traffic control plan. The proposed plan shall be prepared by an American Traffic Safety Services Association (ATSSA) certified company and shall be submitted at the pre-work conference. The traffic control plan and all signs used shall be in compliance with the Manual of Uniform Traffic Control Devices (MUTCD). The CO shall approve the traffic control plans in writing before any work begins.

Measurement

635.26 Add the following:

There shall be no separate measurement for temporary traffic control items.

Payment

635.27 Add the following:

Payment for traffic control shall be incidental to the other project work items shown in the bid schedule.