RFP_Book2__Grand_Loop.pdf

YELLOWSTONE, GRAND TETON, & SURROUNDING AREA MATOC

TASK ORDER REQUEST FOR PROPOSALS

Solicitation No. DTFH70-13-R-00004

WY PRA YELL 10(17)

GRAND LOOP ROAD, NORRIS TO GOLDEN GATE, PHASE I BOOK 2 OF 2

Solicitation, Offer & Award, Bid Schedule, Contract Clauses, Minimum Wage Schedule, Special Contract Requirements, and Plans

This solicitation cites Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, FP-03 – US Customary

ISSUING OFFICE:

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL HIGHWAY ADMINISTRATION

610 EAST FIFTH STREET

VANCOUVER, WA 98661-3801

Phone: (360) 619-7520 – FAX: (360) 619-7932 Web site: http://www.wfl.fhwa.dot.gov/contracting/ e-mail: wfl.contracts@dot.gov

WORLD HERITAGE SITE

Proposal Due Date:

See page A-3, Block 13A

QUICK INDEX

Page Item

F-1 Special Contract Requirements H-1 Permits I-1 Stormwater Pollution

Prevention Plan J-1 Director’s Order #65:

Explosives Use and Blasting Safety

PROPOSAL REMINDERS

Electronic proposals will not be accepted. Submit printed copy to the address listed on the enclosed SF 1442.

Before submitting your proposal, please review the following:

• Have you rechecked your figures?

• Have you completed the bid schedule?

• Have you completed and signed the SF 1442, Solicitation, Offer & Award?

• Have you acknowledged all amendments?

• Have you completed the Representations &

Certifications (Page B-1)?

• Is your bid guarantee enclosed in proper form and amount (see FAR Clause 52.228-1), including Power of Attorney affidavit?

• Does the lower left corner of the proposal envelope state “Proposal Enclosed”?

• Does the lower left corner include DTFH70-13-R- 00004 and the project number/name?

A-1 Notice to Offerors http://www.wfl.fhwa.dot.gov/contracting/ mailto:wfl.contracts@dot.gov

PROJECT NAME WY PRA YELL 10(17)

GRAND LOOP ROAD, NORRIS TO GOLDEN GATE, PHASE I

SCHEDULE A LENGTH 4.555 MILES

Grand Loop Road, 40+00 to 280+50; Culvert Replacements on Norris Geyser Basin road; and Elk Park Reclamation

SCHEDULE B LENGTH 5.095 MILES

Grand Loop Road, 40+00 to 309+07.32; culvert Replacements on Norris Geyser Basin Road; and Elk Park Reclamation

SCHEDULE C LENGTH 4.849 MILES

All work under Schedule A and all work associated with Grand Loop Road, 670+40 to 686+00

SCHEDULE D LENGTH 5.390 MILES

All work under Schedule B and all work associated with Grand Loop Road, 670+40 to 686+00

NATIONAL PARK YELLOWSTONE

COUNTY PARK

STATE WYOMING

FIXED COMPLETION DATE See FAR Clause 52.211-10 (FAR Clauses begin on page C-1)

F-1

Special Contract Requirements Project: WY PRA YELL 10(17), Grand Loop Road, Norris to Golden Gate, Phase I

03USC01/01/04

Section 201. — CLEARING AND GRUBBING

Description

201.01 Add the following:

This work also includes the salvaging of snags, trees, and limbs as defined herein for use under Section 647 as landscaping logs.

Construction Requirements

201.03 General. Add the following:

Do not begin clearing until adjustments to the limits have been made by the CO according to Subsection 152.03(d).

Remove vegetation in a manner that does not compact or gouge the topsoil. Do not mix topsoil with subsoils. Do not drive or park on conserved topsoil and wetland sod, before or after removal.

201.04 Clearing. Add the following:

(e) Salvage and stockpile all sound trees and snags greater than or equal to 12 inches in diameter at breast height (DBH); as well as, selected trees with a DBH between 8-inches and 12-inches; and other trees and snags with a DBH less that 8-inches as selected by the CO.

Stockpile the aforementioned trees and snags, as directed by the CO, for subsequent placement on completed slopes according to Section 647. Approximately 50 percent of the snags may be located adjacent to but outside the clearing limits and will be marked by the CO. No vehicular or equipment access will be allowed beyond the clearing limits. Salvage trees and snags in random lengths from 12 to 30 feet and, when necessary, limb one side.

Salvage sound snags and dead trees before using live trees. Prepare salvaged logs for landscaping in such a manner as to provide irregular broken ends. Do not disturb areas that have received topsoil. To the extent possible, handle landscape logs in a manner that minimizes the loss of limbs. Leave rootwads attached to snags or trees where removal allows.

(f) When more than 50 percent of a tree’s root zone is removed, flush cut the tree at an angle such that the cut surface of the stump is not visible from the roadway.

(g) All trees and snags not salvaged, as well as, excess salvaged trees and snags not used under Section 647 are to be disposed according to Subsection 203.05.

(h) Unless otherwise directed by the CO, limit clearing to 2 feet beyond the slope stake limits within parking areas, sidewalks, approach roads, the Norris Geyser Basin Road, and areas adjacent to wetlands and thermal areas. Trees designated to remain will be marked by the

CO.

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(i) Before winter shut down, place at least six snowpole delineators around each designated stockpile area for trees and snags as directed by the CO.

201.05 Grubbing. Add the following:

(e) Conserve topsoil before removing stumps unless otherwise stated or approved by the CO.

Conserve topsoil according to Subsection 204.05.

Measurement

201.08 Add the following:

Where the new construction follows the existing road, exclude that portion of the old roadbed within the clearing and grubbing limits from the measurement width. Also exclude the area of any body of water and non-vegetated portions of its shoreline within the clearing and grubbing limits.

F-3

Section 202. — ADDITIONAL CLEARING AND GRUBBING

Description

202.01 Add the following:

This work also includes special clearing without grubbing.

202.02 Definitions. Delete the text of paragraph (c) and substitute the following:

(c) Special Clearing. Clearing all trees and vegetation as specified below.

Construction Requirements

Delete Subsection 202.06 and substitute the following:

202.06 Special Clearing.

Do not conserve topsoil within special clearing limits. Where special clearing is designated, flush cut willows above the root collar (about 1” above the original ground surface); and clear other vegetation within the special clearing limits according to Section 201. Adjust limits and above ground cut heights in the field as directed by the CO.

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03USC06/04/07

Section 203. — REMOVAL OF STRUCTURES AND

OBSTRUCTIONS

203.01 Add the following:

This work also includes removing the entire Gardner River Bridge; disposing or salvaging and stockpiling components from the existing Gardner River Bridge as specified herein; stockpiling structures and obstructions as designated; and removing and disposing the existing log deck at the Arnica Creek Pit.

203.03 Salvaging Material. Add the following:

Unless otherwise stated, stockpile all salvaged material at Norris Asphalt in a neat and orderly fashion to minimize damage. Stockpile items as directed by the CO.

Salvage all existing wooden sign panels, metal sign panels and delineators designated for removal and dispose of wooden sign posts according to Subsection 203.05.

Salvage all monuments designated for removal, and deliver to the CO upon removal.

Salvage all rocks from existing rockery toe walls designated for removal.

Salvage all metal gates designated for removal. Installed gates for temporary traffic control are to remain in place until closures are no longer needed. Existing gates are to remain in place until the new gates are to be installed.

Salvage base course from the Gardner River Bridge Detour according to Section 310.

Salvage asphalt curbs, sidewalks and steps; and incorporate into the production of cold recycled asphalt base course according to Section 408.

Salvage all concrete elements to be removed on this project, including but not limited to:

concrete elements of the existing Gardner River Bridge; drainage structures; curbs and/or gutters;

concrete pads; and concrete footings for metal gates.

203.03A Salvaging Stone Masonry Material. (Added Subsection)

Stone in existing stone masonry structures are historically significant. It is the intent of this contract to construct masonry structures that mimic the pattern and character of the existing stone masonry structures. Provide a stone mason meeting the requirements of Section 620 to disassemble and reconstruct stone masonry structures.

Before removing and salvaging stone masonry, take photos of existing stone masonry structures according to Section 620 to obtain references for the stone masonry features to mimic; and submit a stone masonry removal and salvage plan to CO for approval that includes, but not limited to the following:

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(a) Experience and qualifications of each stone masons performing the work;

(b) List of equipment used to perform the work;

(c) Process to remove stones so they are suitable for reuse;

(d) Actions to protect and preserve salvaged stones;

(e) Methods of recording the existing stone masonry features;

(f) Temporary storage of salvaged material; and

(g) Reconstruction plan.

Take all necessary precautions to prevent damage to stone when disassembling. Do not damage the patina, lichen, or character of the stone masonry designated to be salvaged.

Disassemble stone masonry using hand tools. Salvage all sound and undamaged stones from stone masonry structures. Remove mortar and clean stones without damaging the patina, lichen, or character of the stones to be salvaged.

Remove mortar and clean stones. Take all necessary precautions to prevent damage to stone when disassembling. Only retain stones for salvage that are sound and undamaged. Stockpile salvaged stones at a designated area in the Park as directed by the CO. Use the salvaged stone in the construction of the stone masonry in the new bridge.

Perform the following work when disassembling stone masonry:

(a) Gardner River Bridge. Disassemble and salvage stones from the existing Gardner River Bridge abutments, wingwalls, and piers. Stockpile stones adjacent to the structure or at designated staging and stockpile sites as directed by the CO.

(b) Headwalls. Stockpile salvaged stone adjacent to new stone masonry headwall locations within the clearing limits, and away from construction activities. Store stones salvaged from the same structure together and mark with the location or stationing information. Take all necessary precautions to prevent damage to stone when disassembling.

Stockpile headwall stones within roadway obliteration areas at locations designated by the CO for incorporation into the new work.

Use the salvaged stones in addition to newly cut dimension stones, as required, in the construction of a new stone masonry structure according to Section 620.

(c) Stone Masonry, Curbs. Disassemble and salvage the stones from the deteriorated structure. Salvage other ornamental and curb stones, found within the adjacent areas, that have been displaced from the existing structure.

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Store salvaged stones and boulders adjacent to the site within the clearing limits, and away from construction activities. Store in a manner that protects the stone material from scarring or damaging the patina and lichen surface.

Use the salvaged stones in addition to newly cut dimension stones, as required, in the construction of a new stone masonry structure according to Section 620.

(d) South Twin Lake Stairs. Remove and salvage stone risers and edge stones from the existing stairway at South Twin Lake. Stockpile salvaged stones adjacent to the worksite, within the clearing limits, and away from construction activities. Use the salvaged stones in addition to newly cut stones, as required, in resetting the stairs according to Section 646.

(e) Waterways, channels, and basins. Stockpile salvaged stones at these locations adjacent to the work site, within the clearing limits, and away from construction activities. Use the salvaged stones in addition to newly cut stones, as required, in the construction of new stone masonry structures according to Sections 608 and 620.

(f) Roaring Mountain Kiosk Stones. Remove and salvage the stone masonry components from the existing Roaring Mountain Kiosk. Stockpile salvaged stones adjacent to the worksite, within the clearing limits, and away from construction activities. Use the salvaged stones in addition to newly cut stones, as required, in resetting the Roaring Mountain Kiosk according to Section 646.

Reassemble stone masonry structures in accordance to Sections 608, 609, 620, and 646.

Haul and stockpile excess stone material not incorporated into the new work as directed by the CO at Norris Asphalt or Gibbon Meadow Pit.

203.04 Removing Material. Delete the text of this Subsection and substitute the following:

(a) General. Saw cut sidewalks, curbs, pavements, and structures when partial removal is required.

Construct structurally adequate debris shields to contain debris within the construction limits.

Do not permit debris to enter waterways, travel lanes open to public traffic, or areas designated not to be disturbed.

Raze and remove all buildings; foundations; monuments; pavements; walls; boardwalks;

sidewalks; curbs; culverts and drainage features; fences; log decks; structures; and other obstructions interfering with the work and not designated to remain.

Where part of an existing culvert is removed, remove the entire culvert upstream from the removal. The remaining downstream culvert may be left in place if no portion of the culvert is within 4 feet of the subgrade, embankment slope, or new culvert or structure; and the culvert ends are sealed with concrete.

F-7

Remove structures and obstructions in the roadbed to 3 feet below subgrade elevation.

Remove structures and obstructions outside the roadbed to 2 feet below finished ground or to the natural stream bottom.

Except in excavation areas, backfill and compact cavities left by structure removal with backfill material to the level of the finished ground. Backfill excavated areas according to Subsection 209.10. Compact backfill according to Subsection 209.11.

(b) Bridges debris containment. Construct appropriate containment to prevent all construction related debris from falling into the river while removing the existing bridge materials. At least 14 days before beginning operations, submit a written plan for acceptance that details the measures to be used for protecting the environment, the public, adjacent property, and workers. Allow seven days for approval or rejection of the plan. Provide a narrative and drawings to detail the following:

(1) A detailed containment plan for removed material, construction debris, and any additional materials that may be generated. Include details of attachment to the structure if applicable;

(2) Specific safety measures to protect workers from site hazards including falls; and

(3) A competent person responsible for ensuring that all necessary health, safety, and containment measures are enacted and maintained.

(c) Concrete removal by mechanical impact methods. Saw cut ¾ inch deep along all boundaries of repair areas.

Use power-driven hand tools to remove existing concrete with the following restrictions:

(1) Do not use jack hammers heavier than 30 pounds.

(2) Do not operate jack hammers and mechanical chipping tools at an angle in excess of 45 degrees from the surface of the slab.

(3) Do not use chipping hammers heavier than nominal 30-pound class to remove concrete from beneath reinforcing bar.

Where the bond between existing concrete and reinforcing steel is destroyed, remove all concrete adjacent to the steel to provide at least ¾-inch clearance for the new concrete to bond to the steel.

Use hand tools (hammers and chisels) to remove final particles of concrete or to achieve the required depth.

After removal of deteriorated and unsound concrete, sandblast all exposed structural steel, reinforcing steel, and concrete surfaces that will be in contact with repair material. Remove all rust and foreign material. Clean the sound concrete surface by flushing with a high-pressure water jet or oil-free compressed air.

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(d) Reinforcing steel. Do not cut or damage reinforcing steel designated to remain in place.

Repair or replace all damaged or severely deteriorated bars.

Clean all exposed reinforcing steel that is to remain in place. Remove all rust and corrosive products, including oil, dirt, concrete fragments, laitance, loose scale, and other coatings that may destroy or inhibit the bond with new concrete.

If cleaned reinforcing steel will be exposed for more than 7 days, protect the steel from corrosion and contamination. If the steel becomes corroded or contaminated, clean the steel immediately before the concrete pour.

203.05 Disposing of Material. Amend as follows:

(a) Remove from project. Add the following:

Remove all clearing debris specified under Subsection 201.04(g); grubbing debris, treated timbers; and log decks from the Park unless specified for salvage under Section 201 or Subsection 203.03. Alternatively, clearing debris may be chipped and placed at Norris Asphalt. Remove clearing and grubbing debris before winter shutdowns.

Dispose of removed geotextiles; snowpole holders; culvert, collector, and outlet pipes; pipe end sections; metal drainage frames and grates; timber walls and boardwalks; log curbing;

wood posts; bridge girders and railing; and reinforcing steel outside of park boundaries.

(b) Burn. Delete the text of this Subsection and substitute the following:

Do not burn clearing and grubbing debris within the Park.

(c) Bury. Amend as follows:

Delete the text of the first paragraph and substitute the following:

Do not bury clearing and grubbing debris within the Park.

Do not bury removed concrete within the Park. Haul removed concrete to Ice Lake Pit for further processing. Process removed concrete at Ice Lake Pit by sawing, breaking, ripping, or crushing the removed concrete to separate metal frames and reinforcing from concrete material. Stockpile the concrete at Ice Lake Pit stockpile according to the plans.

Only bury material within the Park as allowed by the CO.

Delete sentence five of paragraph two of (c) and add the following:

Cover the top layer of buried debris with a minimum of 2.5 feet of compacted earth.

F-9

03USC05/14/13

Section 204. — EXCAVATION AND EMBANKMENT

Description

204.01 Add the following:

This work also includes the following:

• Salvaging suitable rock from within construction limits and placing isolated or clustered boulders on selected slopes.

• Salvaging suitable stone masonry stone from within the construction limits for use under Section 620.

204.02 Definitions. Add the following to paragraph (c):

Topsoil refers to the uppermost soil horizon, usually two to eight inches deep. It also includes live vegetation less than three feet in height, limbs less than eight inches in diameter, and organic duff.

Wetland topsoil refers to the uppermost four inches of soil horizon within wetland boundaries.

Material

204.03 Add the following to the Material list:

Crushed aggregate 703.06 Sand 703.15 Backfill, granular (quartz sand) 704.03(c) Boulder 705.08

Construction Requirements

204.04 Preparation for Roadway Excavation and Embankment. Add the following:

Cut existing pavement vertically with wheel or saw prior to excavation.

204.05 Conservation of Topsoil. Add the following:

Unless otherwise stated, remove topsoil before starting other operations.

The depth of topsoil to be conserved along the project limits vary with an average topsoil conservation depth of 2-inches. Unless otherwise restricted in the plans, conserve 4-inches of topsoil within impacted wetland areas; and conserve topsoil to the depth required in the field by the CO outside of wetland areas.

F-10

Nonconventional methods will be required in the removal and stockpiling of topsoil. Use equipment capable of excavating small isolated pockets of topsoil. Hand rake topsoil in areas where topsoil cannot be mechanically removed. Do not compact or drive upon topsoil during removal. Remove the topsoil to be conserved in one pass. Do not to mix topsoil with subsoils.

Conserve topsoil from minor excavation performed under miscellaneous items of work.

Miscellaneous items include but are not limited to curb and sidewalk removal, riprap work, and paved waterway work. Stockpile the materials adjacent to the work area.

Stockpile topsoil in windrows less than three feet high along outer edge of the disturbance or in turnouts within the vicinity that it was removed. Identify removal areas and stockpiles so that the topsoil may be placed over the same general location(s) they were conserved from.

Place wetland topsoil and sods over the same general area(s) that the wetland topsoil and sods were conserved from. Do not mix wetland topsoils from different areas along the project limits.

If it is impractical to windrow topsoil adjacent to the disturbed area or objectionable to the CO due to environmental or other concerns, remove the topsoil and stockpile at an approved location. Haul excess topsoil to the nearest area requiring topsoil but lacking in quantity.

Do not stockpile topsoil for longer than two months in sagebrush/rabbitbrush zones; longer than four months in grass dominated zones; or longer than six months in forested zones unless approved by the CO.

Stockpile wetland sod conserved from impacted wetlands in rolls or pieces in a windrow.

Stockpiling topsoil over the winter is not permitted.

Place conserved topsoil and wetland sod on finished slopes upon completion of finished slopes according to Section 624.

Mulch and finish all topsoiled slopes prior to winter shutdown according to Sections 625.

204.06 Roadway Excavation. Amend as follows:

Add the following to paragraph (a):

Conserve sufficient quantities of 6-inch minus material from the roadway excavation to use for finishing the roadbed. Sufficient quantities are available within the roadway excavation.

Delete Subsection 204.06(b) and substitute the following:

(b) Rock cuts. Excavate rock using methods that minimize impacts to the existing geothermal environment; and will produce the required finished slopes. When rock blasting is required, perform work according to Section 205.

Excavate rock cuts to 6 inches below subgrade within the roadbed limits. Reconstruct to subgrade with topping or other suitable material, compacting the material according to Subsection 204.11.

F-11

Produce rough, irregular rock faces that resemble the surrounding natural rock outcrops, while maintaining the integrity of the finished rock cut face to minimize rock fall and rock instability. Produce final rock cut faces that have a natural, rather than man-made, appearance by constructing cut faces to the approximate inclination and shapes of natural rock outcrops. Construct slopes to blend with the surrounding natural features of the landscape, such as adjacent rock outcrops, draws, and sloping terrain.

The cross-section slope ratios provided are intended for use in locating the top of the cut and calculating excavation quantities. Excavate the final face of the rock cuts on the natural horizontal and vertical joints to create a series of short benches approximating the slope ratio.

Where the joints angle off from the alignment, cut the final face in a sawtooth pattern similar to the rock faces in the existing cut. Construct the final cut face with a large excavator that can extract the blocks from the slope, breaking on the natural rock joints. Some blocks are likely to require secondary reduction prior to use as stone masonry or other rock products.

See Section K in the Plans for additional details.

Add the following:

(d) Conserved boulders. (Added Subsection)

Conserve the following boulder material, from sources identified under Section 105, for placement on finished slopes.

• Oversized boulders encountered in the roadway excavation.

• Boulders not suitable for stone masonry (i.e., do not match color, texture and/or the required size).

• Barrier rocks currently located along the roadside.

Place conserved boulders at locations identified by the CO and the follows:

• Store boulders individually, directly adjacent to the final placement location. Handle materials in a manner to minimize scarring or damage to the patina and lichen surface. Set final boulder placements at the locations identified in the field by the CO.

• Do not use large boulders encountered in the excavation or barrier rocks for the construction of stone items of work. Leave in the slope and construct final backslopes around the boulder or relocate the boulder to a new location directly adjacent to the limits of construction. Minimize scarring of the surfaces to the extent practicable.

• Place boulders in the slope face at locations staked by the CO. Bury boulders to a depth of 1/3 their mass. Lay boulders on firm beds and backfill as required using hand operated equipment.

204.07 Subexcavation. Delete the text of this Subsection and substitute the following:

Excavate material to the limits designated by the CO. Take cross-sections according to Section 152. Prevent unsuitable material from becoming mixed with the backfill. Dispose of unsuitable material according to Subsection 204.14. Compact the material according to Subsection 204.11 unless otherwise specified.

F-12

Limit excavation to the dimensions shown or as designated by the CO. Backfill and compact subexcavations; and construct thermal sections as shown in the plans and according to the applicable portions of Sections 204, and 207.

Excavate only unconsolidated soils within the areas shown in the plans. Do not excavate bedrock or sinter materials. When bedrock or sinter material is encountered within subexcavations at depths shallower than that shown in the plans, or when thermal sections conflict with proposed culvert installations; backfill and compact the subexcavation, or construct the thermal section by reducing the thickness of select borrow or crushed aggregate as needed to establish the proposed subgrade.

If required by the CO, provide roadway aggregate and minor hot asphalt concrete for a temporary driving surface within five days after completing the backfill of any subexcavated area.

Remove, process, and stockpile the existing asphalt concrete surface within subexcavation areas according to Section 310 for use as material under Section 408.

204.10 Embankment Construction. Add the following to paragraph (b):

Construct the top 12 inches of the embankment with 6-inch minus material conserved from the roadway cuts.

204.13 Sloping, Shaping, and Finishing. Delete the text of the first paragraph and substitute the following:

(a) Sloping. Construct slopes with roughened surfaces according to roadside development details shown in the plans.

Construct slopes to staked slope ratios, but steepen or flatten randomly and intermittently to simulate the irregularity of existing terrain. Sculpt slopes to produce irregular ledges, shelves, and planting pockets for vegetation by steepening the nominal slope ratio in staggered locations suitable for placement of topsoil and vegetation.

Leave undisturbed boulders that are firmly in place and protruding from the slope but will be more than 10 feet from the edge of the finished pavement.

(1) Earth slopes. Add material to the fill slopes to obtain varying and undulating contoured slope, rounding at toe of fills, and to flatten selected slopes to blend with existing land forms or promote revegetation, when shown on the plans or determined by the CO. Round tops and bottoms of all slopes, including the slopes of drainage ditches.

Do not round slopes in wetlands or other sensitive areas.

(2) Rock slopes. Construct rock slopes to simulate surrounding rock outcroppings.

Round material overlaying solid rock to the extent practical. Scale all rock slopes as the excavation process progresses and slopes are still accessible to the equipment.

Place boulders conserved from excavations to stabilize and/or landscape slopes as directed by the CO.

F-13

Do not place topsoil or mulch on slopes until authorized by the CO.

204.14 Disposal of Unsuitable or Excess Material. Delete the text of the first paragraph and substitute the following:

Unsuitable material generated from the work may be disposed of at Grebe Lake Pit or within roadway obliteration areas that are outside the roadway prism, as approved by the CO.

Do not dispose of unsuitable or excess suitable material at the Elk Park Reclamation Site.

Excess suitable material generated from the work may be disposed of at Grebe Lake Pit or Ice Lake Pit. Excess suitable material may also be disposed of within roadway obliteration areas that are outside of the roadway prism, as approved by the CO.

The capacity for disposal of unsuitable and excess suitable material at the Grebe Lake Pit is 21,500 cubic yards.

Excess suitable material, up to 10,000 cubic yards may be stockpiled at Norris Asphalt as directed by the CO; only after the disposal capacity at Grebe Lake Pit is reached.

Disposal of excess suitable material is allowed at Ice Lake Pit only after the capacity for stockpiling excess suitable at Norris Asphalt is reached.

Shape and compact the disposal areas as provided in Section 622 and 623.

If material is disposed of off the project, comply with Subsection 105.02 as well as any applicable local, State, and Federal laws.

204.15 Acceptance. Add the following:

Boulders will be evaluated under Subsections 106.02 and 705.09.

Scarified asphalt surface will be evaluated under Subsections 106.02 and 106.04.

Sand and backfill, granular (quartz sand) will be evaluated under Subsections 106.02 and 106.03.

Measurement

204.16 Amend as follows:

Add the following to paragraph (a)(1)(a) Roadway prism excavation:

Use the design volume. The design volume is defined as the bid schedule quantity less any allowance, as shown in the summary of quantities sheet of the plans. This volume is subject to adjustments resulting from changes to slope stakes according to Subsection 152.03(c).

Add the following:

(g) Subexcavation. Measure subexcavation by the cubic yard in its original position.

(h) Watering wetland topsoil. Do not measure watering of wetland topsoil for payment.

F-14

Delete Table 204-1 and substitute the following:

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03USC04/26/10

Section 205. — ROCK BLASTING

Delete the text of this Section and substitute the following:

Description

205.01 This work consists of rock fragmentation blasting using production and controlled blasting techniques to construct engineered rock cuts.

It is the intent of this contract to produce rough, irregular rock faces that resemble the surrounding natural rock outcrops, while maintaining the integrity of the finished rock cut face to minimize rock fall and rock instability. Final rock cut faces will have a natural, rather than man-made, appearance by constructing cut faces to the approximate inclination and shapes of natural rock outcrops. Construct slopes to blend with the surrounding natural features of the landscape, such as adjacent rock outcrops, draws, and sloping terrain.

This work also includes removing all drill hole half-casts and equipment marks from the finished rock cut face and shaping, scaling and stabilizing final rock cut faces as directed by the CO.

205.02 Definitions.

(a) Production blasting. Blasting, using widely spaced blast holes that typically contain larger explosive charges to expedite rock movement and fragmentation for removal.

(b) Controlled blasting. Blasting that includes presplit blasting and cushion blasting techniques. Controlled blasting uses closely spaced and carefully aligned blast holes that typically contain lighter charges than production holes to produce a more stable, aesthetically pleasing rock cut face with minimal blast damage. Controlled blast holes are the first row of blast holes, normally located within 24 inches of the top of the staked slope.

(1) Presplit blasting. Presplit blasting detonates closely-spaced backslope holes before drilling for production blasting, or prior to detonating the production blasting holes to limit overbreak and backbreak in the final rock cut face.

(2) Cushion blasting. Cushion blasting is similar to presplitting except that the detonation of the cushion holes along the backslope is detonated immediately after the detonation of the production and buffer holes to limit overbreak and backbreak in the final rock cut face.

Construction Requirements

205.03 Regulations. Comply with Federal, state, and local regulations for the purchase, transportation, storage, and use of explosive material. Federal regulations include the following:

(a) Safety and health. OSHA, 29 CFR Part 1926, Subpart U.

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(b) Storage, security, and accountability. Bureau of Alcohol, Tobacco, and Firearms (BATF), 27 CFR Part 555, Commerce in Explosives.

(c) Shipment. DOT, 49 CFR Parts 171-179, 390-397.

(d) National Park Service. For projects in National Park Service lands, comply with National Park Service Director’s Order No. 65, Explosives Use and Blasting Safety.

205.04 Qualifications. Submit the following for approval at least 14 days before starting drilling and blasting operations.

(a) Blaster-in-charge. Provide an individual who can directly supervise the drilling and blasting crew during all drilling, loading and detonation of charges and the following:

(1) Name of Blaster-in-charge;

(2) Resume showing at least five years’ experience as a blaster-in-charge on projects with similar work;

(3) Copy of a valid blaster license accepted by the State where the project is located for the type of blasting required and proof of a Federal Employee Possesser Permit; and

(4) Five references with knowledge of qualifications and reliability. Include name, relationship, and current phone number for each reference.

(b) Blasting crew personnel. Names of personnel and evidence they have completed at least 24 hours of blasting safety training in the last five years or have at least two years of blasting experience along with proof of a Federal Employee Possesser Permit for each crew person.

(c) Drillers. Names and evidence they are proficient in drilling methods required to perform the work.

(d) Vibration specialist. Name and resume showing at least five years’ experience as a vibration specialist on projects with similar work.

205.05 Blasting Plans. Furnish proof of applicable permits, licenses, and a general blasting plan signed by the blaster-in-charge at least 14 days before drilling and blasting operations. Blasting plans are not required for boulder reduction blasts (mudcapping or blockholing).

All blasting plans and modification to the plans must be signed by the CO. Do not begin drilling the blast pattern or deliver explosives to the project until the general blasting plan and site-specific blast plan are accepted.

(a) General blasting plan. Submit a general blasting plan for review and approval by the CO. Include the following:

(1) Procedures and safety precautions for transporting, storing, handling, loading, and detonating explosives, conducting pre- and post-blast surveys, monitoring blasts, managing misfires, and removing and disposing of excess explosives.

(2) Explosives transportation and storage plan, including:

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(a) Name, address, and telephone number of explosives suppliers;

(b) Description and license number of explosives transport vehicles, routes to be traveled, proposed hours of travel, and driver qualifications;

(c) Magazine and day-box locations;

(d) Explosives and accessories inventory system; and

(e) Contact information for the person responsible for security of project blasting material and supplies.

(3) Area security plan including explosives and general site security, methods of site communication, pre- and post-blast signage and audible signaling systems, road closure requirements, and pre-blast notification for affected agencies or entities.

(4) Manufacturer’s technical data sheets for proposed explosives, primers, initiators, and related blasting devices and accessories.

(5) Excavation plans and equipment lists for pre-blast scaling and pioneered access roads, and benches for drilling and blasting operations.

(6) Scaled, typical plan and section views for both production and controlled blasting that include the following: stationing intended for each typical blast plan, maximum blast length, free face, burden and hole spacing, hole inclination, hole depth, hole diameter, stemming depth, subdrill depth, powder factor, charge weight per delay, and initiation method, sequence, and delay times.

(7) Methods for limiting ground vibration, airblast overpressures (noise), and dust.

(8) Fire watch plan including number of post-blast observers and duration of the fire watch.

(10) Contingency plan for blast flyrock containment, including the names and qualifications of those responsible for preparing containment system designs.

(11) Method of minimizing half-casts within the final rock face and the method of removing any half-casts or equipment marks from the finished rock face following blasting.

Allow 7 days for review and approval of the General Blasting Plan. Submit revisions and updates to the CO within 48 hours of any change in the above information.

(b) Site-specific blasting plans and general plan revisions and updates. Submit a site-specific blasting plan after approval of the general blasting plan or any time there is a change in drilling and blasting methods provided in the general blasting plan. Allow 5 days for approval. Do not begin drilling the blast pattern until the site-specific plan is approved.

Include the following:

(1) Proposed excavation sequence;

(2) Station limits and plan view of the proposed blast, showing how the proposed blast fits into the lift excavation sequence;

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(3) Elevations of the tops and bottoms of each lift;

(4) Scaled drawings for each blast showing access, containment, plan and section views of drill patterns, clearing limits, free face, burden and blast hole spacing, blast hole locations, subdrill depths, lift height, blast hole diameters, and blast hole angles;

(5) Loading diagram for each blast showing powder factor, charge weight per delay, type and amount of explosives, primers, initiators, locations of any decking, and range of stemming depths for substantial variations within the drill pattern;

(7) Initiation method and sequence of blast holes for each blast. Include delay times, delay system, and down-hole firing times;

(8) Special measures to produce the variable slopes and bench heights while maintaining the integrity of the finished rock cut face;

(9) Methods and equipment for scaling, shaping, and “dressing” the slope to produce rough, irregular rock faces that resemble natural rock outcrops;

(10) Flyrock, airblast overpressure (noise), and ground vibration control measures;

(11) Estimated volume of in-place rock to be blasted. Include the total length of production and controlled blast hole;

(12) Location and orientation of significant joints, fractures, faulting, bedding planes or other rock mass structural features to be accounted for in the site-specific blasting plan;

(13) Any rockfall containment designs and procedures; and

(14) When structures are within an area of ground vibration and/or air-blast overpressure concern, the site-specific blast plan shall include the attenuation study information for the affected structures and indicate that the peak particle velocity versus peak frequency will not damage each structure.

205.06 Pre-blast condition survey and blast monitoring and control. The Contractor is responsible for damage resulting from blasting-related ground vibrations and/or air-blast over-pressures. Provide the services of a Vibration Specialist on all projects. The Vibration Specialist will determine the need for vibration and/or air-blast over-pressure monitoring depending on atmospheric conditions, soil and rock conditions, blasting parameters as outlined in the blasting plan, and proximity of buildings, structures, utilities, and sensitive natural features that may be subject to damage from ground vibrations or air-blasts. If monitoring is required conform to the following requirements.

If not specified in the Plans, use published blasting criteria for buildings, structures, utilities and/or natural features that conform to federal, state, or local regulatory requirements. Present blasting criteria in terms of distance of the facility or feature from blasting, maximum allowable peak particle velocity limits versus structure (material) type, maximum allowable peak particle velocity versus peak frequency, and air-blast over-pressure structure damage limits.

Before blasting, conduct a pre-blast condition survey of nearby buildings, structures, utilities and/or natural features potentially damaged by blasting-related ground vibrations or air-blast, documenting the natural frequency of each affected structure or feature. Use a survey method

F-21 acceptable to the Contractor’s insurance company. Submit a copy of pre-blast condition survey records with the site-specific blasting plans for CO review.

Control ground vibrations and air-blast over-pressures with properly designed delay sequences and maximum allowable charge weights per delay. Verify allowable charge weights per delay by conducting representative trial blasts and measuring ground vibrations and air-blast over-pressure levels. The attenuation study will enable successful prediction of the peak particle velocity in any component (longitudinal, transverse, or vertical) anywhere on the surface of the structure(s). Conduct test blasts with blast plan modifications that limit ground vibrations and air-blast over-pressures to levels that will not cause damage to nearby buildings, structures, utilities and/or natural features as determined by the Vibration Specialist. Submit a copy of the attenuation study results and predicted peak particle velocity versus peak frequency for each structure.

When ground vibration or air-blast damage is possible, monitor each blast with digital recording seismographs and air-blast monitoring equipment calibrated within the last year and approved by the CO. Locate monitoring equipment per the directions of the Vibration Specialist, placing a minimum of three recording stations between the blast area and closest susceptible structures, utilities or natural features, as well as at least one station on the structure. For ground vibration monitoring, use self-triggering seismographs capable of measuring peak air blast overpressure and recording particle velocity, displacement and acceleration for three mutually perpendicular components of vibration in the range generally found for controlled blasting. The instrument shall contain internal calibration and triaxial orthogonal transducers with flat frequency response from 2 to 250 hertz with a minimum sampling rate of 1000 data points per second with sufficient memory to store the full blasting sequence and their locations. Seismographs must be capable of producing a permanent digital time history file for each ground motion episode.

Ensure blasting operations incorporate collected data and findings from vibration monitoring by having the Vibration Specialist interpret all seismograph and air-blast records. Submit a copy of the interpreted seismograph and air-blast records to the CO with a certifying signature by the Vibration Specialist. If actual peak particle velocity versus peak frequency measurements exceed those predicted for a structure, the site-specific blast plan will need to be adjusted for the actual structural response to the blasting. The plan may include adjustments to pattern, loading, timing, flyrock measures, etc.

Each blast shall be recorded using digital video equipment from two locations that clearly show the entire proposed blast site, preferably from locations on both sides of the blast.

205.07 Special Blasting Requirements. Solid cut slope lines shown on the roadway cross sections indicate the average final slope geometry. Special blasting measures must be used to produce variable slopes and bench heights while maintaining the integrity of the finished rock cut face. These measures include variable hole depth, non-linear, or staggered, controlled blasting lines, variable hole inclinations, and typically light powder factors in both the controlled and production blasting. Be advised that these measures may result in an abundance of oversize material. The CO may adjust actual catch points, slope gradients, and cut details in order to provide rock sculpting that mimics the natural outcrops in the area. If adjustments to the actual catch points are made, earthwork volumes are subject to adjustment according to Section 204.

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205.08 Test Blasting. Before beginning full-scale drilling and blasting, demonstrate adequacy of the site specific-blasting plan by drilling, blasting, and excavating a test blast of up to 100 cubic yards with any proposed containment measures in-place. Conduct the test at an approved location within the planned excavation area.

Space blast holes for presplit/cushion blasting no more than 30 inches apart for the initial test blast. Adjust the spacing based on the results of the test blast(s) for each excavation in differing geology as approved by the CO. Use the approved spacing in the full-scale blasting or subsequent test blasts if necessary.

A test blast is unacceptable when it results in excessive flyrock, potentially damaging ground vibrations or air-blasts, unplanned overbreak and backbreak, excessive damage to the final rock cut face, or results in unwanted overhangs. When a test blast is unacceptable, revise the site-specific blasting plan and conduct additional test blasts until the combination of blast hole pattern spacing, timing, controlled blast-hole alignment, and charges produce acceptable results.

205.09 Blasting. Use explosives and initiating devices less than 1-year old. Locate explosives magazines at sites approved by the CO.

Limit Blasting and Test Blasting according to Section 107.

Inspect the pre-blast area and submit the proposed extent of pre-blast clearing and scaling to the CO for approval.

Use angle- or fan-drilled holes as needed during initial pioneering operations to obtain the desired face. Controlled blasting requirements are applicable to pioneering work.

Record and maintain a log of each blast-hole drilled identifying the depth, color and character of the cuttings, presence of seams or voids, presence or groundwater or seeps, estimated penetration rate, hole collar location and orientation, and other pertinent information. Prior to initiating the blast, prepare a blast plan map and submit it to the CO showing designated hole numbers along with individual hole logs completed, dated and signed by the driller.

Before placing charges, all blast holes will be free of obstructions for its entire depth. All necessary precautions will be exercised so that the placing of the charges will not cause caving of material from the walls of the holes and around the hole-collar.

Mitigate uncontrolled gas pressure loss during blasting and excessive blast noise by stemming the…