202REMOVAL OF STRUCTURES AND OBSTRUCTIONS

New Hampshire Department of Transportation Standard Specifications – 2016 Description

1.1This works hall consist of the demolition, removal and satisfactory disposal of buildings, including contents, foundations,

above ground fuel storage tanks in and adjunct to buildings, decommissioning of septic systems and wells, and other obstructions pertaining thereto, as designated on the plans or in the Contract.

1.2The work shall also consist of the removal and salvage, satisfactory disposal of pipes or filling abandoned pipes with flowable

fill, and other items as designated on the plans or ordered.

1.3When the item of demolishing buildings is shown as “ subject to prior removal”, the Department reserves the right to arrange

for the removal or demolition of the building or buildings that have been designated on the plans to be removed by others pri or to a specified date. If the buildings have not been completely removed by others prior to that date, the work to be done shall be th at described in 1.1 and 1.4.

1.4Salvaging of designated materials; removing or breaking up, as ordered, of septic tanks; backfilli ng any resultant spaces,

trenches, holes, or pits including dug wells and cesspools; furnishing and erecting temporary barricades; and the final grading and cleaning up of the site shall be included under this work unless such work is included under other items in the Contract. Material Requirements

2.1Backfill material shall conform to AASHTO M 57 using the definitions given in AASHTO M 146, except the density

requirements shall conform to 203.3.8.

2.2Flowable fill for filling abandoned pipes shall consist of materials conforming to Section 520 .

Portland Cement (Type II) 20 lb. Ground Granulated Blast Furnace Slag 100 lb. Sand 2,830 lb. Water 40 - 50 gal Air Entrainment 10 - 15 percent Construction Requirements

3.1General.

3.1.1 The Contractor's attention is directed to 104.04 . The Contractor must also comply with all Federal, State, and local laws and regulations for removal, transportation, and disposal of structures and obstructions. As ordered, the Contractor shall raze, remove, and dispose of all buildings and foundations, structures, guardrail, fences, and other obstructions any portions of w hich are on the right -of-way except utilities and those obstructions for which other provisions have been made for removal. All designated salvageable material shall be removed without unnecessary damage in sections or pieces that are readily transportable, and shall be stored by the Contractor at specified places within the project limits. Unusable perishable material shall be destroyed. Nonperishable material not designated for salvage shall be buried as directed or, with written permission of the property owner, may be disposed of off the project prov ided that the material remains outside the limits of view from the project, other highways, and residences. Copies of all such agreements with property owners shall be furnished to the Engineer. If disposal is by burial on private land, it must be in accordance with 106.10. 3.1.2 Blasting or other operations necessary for the removal of an existing structure or obstruction, which may damage new construction, shall be completed prior to placing the new work. 3.1.3 Foundations and holes resulting from operations, except within the limits of subsequent excavation, shall be backfilled in accordance with the provisions of Section 203. If caving has occurred, the caved material shall be r emoved before backfilling is undertaken. All excavated material shall be used or disposed of in accordance with the provisions of Section 203.

3.2Demolishing Buildings.

3.2.1 In the case of buildings to be demolished, the Engineer will notify the Contractor when any building becomes available. Upon notification of availability, ownership of the building or buildings, including all equipment, fixtures, building materials, and debris remaining on the lot, except facilities belonging to a public or private utility company, shall transfer from the State to the Contractor. 3.2.2 The Contractor shall ascertain whether any water, sewer, gas, electric, cable TV, or telep hone services are still connected to the building; if so, the Contractor shall disconnect and terminate all services in compliance with the requirements of the controlling municipality or company and then proceed with the demolition of the building. 3.2.3 The Contractor shall protect all openings resulting from demolition or removal by use of temporary barricades as necessary for the protection and safety of the public. All barricades and obstructions shall be illuminated at night when or dered. New Hampshire Department of Transportation Standard Specifications – 2016 3.2.4 Basements remaining in embankment areas shall be cleared of all interior partition walls and materials including but not limited to storage tanks, other equipment, and debris. When directed, to provide vertical drainage, the floor shall be thoroughly broken up into pieces no larger than 4 ft 2 or shall be perforated at least every 10 ft. , lengthwise and crosswise, with holes 1 ft 2 or more in area. Foundation walls shall be pushed in or removed to at least 1 ft. below the adjacent ground level. 3.2.4.1 When the Engineer has ascertained that the above provisions have been complied with, the basement shall be filled to the level of the surrounding ground with the same type of material as that found at the site and shall be compacted as ord ered. 3.2.5 When the buildings have been substantially demolished and removed by others, the Engineer may require the Contractor to remove and dispose of rubbish and debris; demolish foundations; break up basement floors; clean the basement of partitions and other materials; clean up the site; and grade, loam, seed, fertilize, and mulch the area. 3.2.6 All materials that result from building demolition shall be disposed of by an approved method. The Contractor's attention is directed to RSA 149 -M in that building demolition material is classified as solid waste and as such shall be disposed of only in permitted sites. New Hampshire Department of Environmental Services, Division of Waste Management is the permitting agency. 3.2.7 Existing sewer laterals or septic system shall be de commissioned. Existing sewer laterals shall be disconnected and capped. The septic system shall be decommissioned by pumping out the septic tank, removing or breaking up the septic tank, removing any pipes or chambers, if in existence, aerating leach field material, and burying aerated leach field material a minimum of one foot below existing ground. 3.2.8 Existing wells shall be sealed in accordance with N.H. Water Well Board Administrative Rules, part We 604. Existing dug wells shall have the cover and well tiles removed to an elevation of two feet below the proposed roadway excavation or within two feet of the finished ground. The well shall then be backfilled with gravel free of organic matter to within two feet of roadway subgrade or finished ground in accordance with the requirements of 304.3 as appropriate. The remaining two feet outside and/or below the roadbed shall be filled with impervious material such as clay or hardpan. 3.2.9 The Contractor shall remove any existing pump, waterline, and mis cellaneous hardware from the well. The existing pump, waterline, and miscellaneous hardware removed from the well shall become the property of the Contractor, unless otherwise noted, and shall be properly disposed of according to current State and Federal regulations. The Contractor shall notify the Engineer before removing the pump.

3.3Removal of Pipes and Other Drainage Structures.

3.3.1 Existing sewer, water, miscellaneous other pipes and appurtenances, catch basins, manholes, and other drainage structures, that are not to remain as integral parts of a drainage system, shall be removed as directed. Those under roadways in use by traffic shall not be removed until satisfactory arrangements have been made to accommodate the traff ic. 3.3.2 When the Engineer determines that sections of pipe removed are suitable for re- use, they shall be stockpiled, where directed, within the project area; when not suitable for re -use, they shall be disposed of by the Contractor. Catch basin and drop inlet grates, manhole covers, frames and all such castings, and granite curb inlets shall be carefully removed and likewise stockpiled for salvage by the State. Other parts of catch basins, drop inlets, and manholes shall be disposed of by the Contracto r. 3.3.3 Trenches and holes resulting from removal operations, except those within the limits of subsequent excavation, shall be backfilled in accordance with the provisions of 203. If caving has occurred, the caved material shall be removed before backfill is undertaken. All excavated material shall be used or disposed of in accordance with the provisions of Section 203.

3.4Removal of Underground Storage Fuel Tanks and Hazardous Materials.

3.4.1 The Contractor shall perform all work as shown on the plans and specified in the Contract. 3.4.2 Contractor's attention is directed to the regulations that may affect the removal operations relative to contaminated soil identification, removal, and disposal; tank removal, transportation, and disposal; and site safety as follows: National Fire Safety Code, Chapter 30, Appendix B New Hampshire Hazardous Waste Rules He-P 1905 Water Supply WS 411 US Laws 49CFR 173.29 and 40CFR part 280

3.5Blank.

3.6Removal of Guardrail.

3.6.1 Existing guardrail that is not to remain as an integral part of the Project shall be removed as specified in the Contract documents or as directed. Beam and cable guardrail, in whole or in part designated to be salvaged, shall be carefully removed and

New Hampshire Department of Transportation Standard Specifications – 2016 handled in a manner that will allow reuse. Buckets, brackets, bolts, nuts, and miscellaneous hardware shall be placed in s uitable containers for storage. Guardrail designated to be salvaged shall be stored in accordance with 3.1.1. 3.6.2 Beam and cable guardrail, fittings, hardware, post, and blocks determined unfit for reuse, or not designated for salvage, shall be properly disposed of in accordance with 3.1.1.

3.7Abandon Pipes. Existing pipe or drainage structures or portions there of designated to be abandoned in place shall be filled

with flowable fill. 3.7.1 Ends of pipes and longitudinal drainage structures shall be c apped or blocked closed with vents to allow air to escape and flowable fill to show when drainage structure is full. 3.7.1.1 For pipes that are greater than 25 feet in length it will be necessary to insert a grout pipe or pull a hose through the pipe and pump the flowable fill. The Contractor may propose alternate mixes of flowable fill or grout to the Engineer for approval as a means to reduce the pumping requirements. Pipes 4 feet in diameter or greater shall be filled in two lifts. The first lift shall fill the pipe two thirds of the diameter and then be allowed to cure for a minimum of 18 hours. The remainder shall then be filled . 3.7.2 Proportioning, batching, placing and curing of flowable fill shall conform to the appropriate sections of 520.3. 3.7.2.1 Test data of the proposed mixture shall be submitted to the Engineer for review and approval prior to placing.

3.8Removal of Fences. Existing fence that is not to remain as an integral part of the Project shall be removed and disposed of

in accordance with 3.1.1 as specified in the Contract documents or as directed.

3.9Curb removal for salvage. Existing curb that is not to remain as an integral part of the Project shall be carefully removed

for salvage and stored as specified in the Contract documents or as directed. Method of Measurement

4.1Individual buildings, or groups of buildings when such are designated as separate units, will each be measured as a unit.

When more than one unit is specified in the Contract, a separate item numbers will appear for each separate and complete unit.

4.2Pipe removed will be measured by the linear foot to the nearest 1 ft. within the specified size group, measured in place prior

to removal if practicable; otherwise, the length of pipe removed will be computed as the product of the number of commercial lengths and the nominal lengths. 4.2.1 All solid rock will be measured as rock structure excavation. Boulders, mortared structures such as headwalls, and the like, found to m easure 1 cy or more, will also be measured as rock structure excavation when such excavation is performed for pipe removal, but pipe itself will not be measured as rock.

4.3Catch basins, drop inlets, and manholes removed will be measured by each. No extra measurement will be made for granite

curb inlets removed unless an item therefore is included in the Contract.

4.4Curb removal for salvage will be measured by the linear foot to the nearest 1 ft.

4.4.1 Removal of Bituminous curb and/or curb board with fillet will not be measured.

4.5Removal of guardrail will be measured, by the linear foot to the nearest 1 ft.

4.6Fill abandoned pipe will be measure d by the cubic yard to the nearest of flowable fill based on delivery slips of material

placed. 4.6.1 Flowable fill removed because of faulty workmanship, or remaining in the delivery vehicle will not be included in the pay quantity. Basis of Payment

5.1The accepted quantities of buildings, pipes, box culverts, catch basins, drop inlets, manholes, removal of guardrail, curb

removal for storage and other obstructions demolished or removed will be paid for at the Item Bid Price per unit of measureme nt for each of the pay items listed hereinafter. 5.1.1 No payment will be made herein for the removal of obstructio ns encountered within the payment limits of another excavation item in the Contract. 5.1.2 Removal of the pump, waterline and miscellaneous hardware from the well will be subsidiary.

5.2There will be no separate payment for excavation for items paid for herein except that rock measured under 4.2.1 will be paid

for under 206.2. 5.2.1 Gravel and the impervious material for backfilling the well(s) will be subsidiary.

5.3Existing pavement removed will be paid for under the pertinent excavation items.

New Hampshire Department of Transportation Standard Specifications – 2016 5.3.1 Sawcutting pavement for removal shall be subsidiary.

5.4The following provisions are in connection with the item of demolishing buildings:

5.4.1 There will be no separate payment for the cost of any utility work includin g charges, if any, that may be made by the municipality and utility companies. 5.4.2 If the bid is such that the Contractor is to pay the State, the Contractor shall indicate such payment by writing the word “ credit” and deducting such amount in arriving at its total bid. 5.4.3 The State cannot assume responsibility and must be held harmless for damage to buildings or losses of or from buildings between the date of advertising for bids and the time the Contractor can take possession. 5.4.4 Work performed under 3.2.5 and 3.4 will be paid for either under pertinent items of the Contract or as provided under

109.04

5.5When no basis of payment for the removal of structures and obstr uctions is included in the Contract, such work will be

subsidiary except as provided for in 5.4.4.

5.6Removal of guardrail will be paid for at the Contract unit price per linear foot.

5.6.1 Removal of bituminous curb and/or curb board with fillet will be paid for under the excavation item unless otherwise specified in the plans. 5.6.2 No separate payment will be made for the removal of guardrail anchors or terminal units.

5.7There will be no separate payment for backfill material and such work will be subsidiary to the respective removal item.

5.8There will be no separate payment for decommissioning sewer laterals or septic systems and such work will be subsidiary to

demolishing buildings.

5.9The accepted quantities of fill abandoned pipe or drainage structure will be paid for at the Contract unit price per cubic yard

complete in place. Capping or blocking, installation of grout pipes or hoses, vents and pumping will be subsidiary. Pay items and units: 202.1XX Demolishing Buildings Subject to Prior Removal Unit

202.2Demolishing Buildings Unit

202.2XX Demolishing Buildings Unit

202.31Fill Abandoned Pipe Cubic Yard

202.32Fill and Abandon Structure Cubic Yard

202.41Removal of Existing Pipe 0 to 24” Diameter Linear Foot

202.42Removal of Existing Pipe Over 24” Diameter Linear Foot

202.5Removal of Catch Basins, Drop Inlets, and Manholes Each

202.51Removal of Granite Curb Inlets Each

202.6Curb Removal for Salvage Linear Foot

202.7Removal of Guardrail Linear Foot

202.9Removal of Fuel Tanks Unit

New Hampshire Department of Transportation Standard Specifications – 2016

Description

This work shall consist of excavation of all material not being removed under some other item, placement and compaction

of all material required for the work, and necessary disposal of all other material. The excavation will be classified as described below. Embankment -in-place shall consist of furnishing, placing and compacting the total volume of embankment material required to construct fills below subgrade and within template lines as shown on the plans excluding slope protection measures and landscaping treatments paid under separate items.

This work shall consist of constructing guardrail terminal unit platforms, offset platforms for E AGRT terminal and Smart

Workzone (SWZ) device platforms as shown on the plans or as ordered. Classification of Material

Common excavation shall consist of all excavation not included as rock excavation or not otherwise classifie d. Glacial till

or boulder clay will be considered as common excavation.

Rock excavation shall consist of all solid rock that cannot be removed without blasting or ripping. It shall also consist of

boulders and parts of masonry structures, except unreinforced concrete slabs less than 6” in depth, when found to measure 2 cy or more.

2.3Unclassified excavation shall consist of all materials of whatever character encountered in the work.

2.4Muck shall consist of deposits of saturated or unsaturated organic soils having an organic content of 20 percent or greater by

weight as determined by AASHTO T 267 and is greater than 2 feet thick when in the upper soil profile (topsoil) and is determined to be unsuitable for foundation material. The material contains partially decayed organic matter, is fibrous in texture, dark brown or black in color, and has an odor of decay.

2.5Embankment material shall conform to AASHTO M 57 using the definitions given in AASH TO M 146, except the density

requirements shall conform to 203.3.8.

2.6Concrete class F, flowable fill may be requested in writing as a substitute for embankment. Approval shall be in consideration

of, but not limited to, differ ential frost heaving due to dissimilar materials, unit weight, structural requirements, lack of permeability, and damming resulting from water flow cut off.

2.7Unsuitable material shall consist of any saturated or unsaturated natural or man -made material such as, but not limited to,

stumps, vegetation, demolition debris and structures encountered during the work that the Engineer determines to be unsuitabl e for foundation material.

2.8Gravel and crushed gravel for shoulder leveling for guardrail and SWZ device platforms shall conform to 304.2.4 and 304.2.6

respectively. Construction Requirements

General. The excavation and embankments shall be finished to reasonably smooth and uniforms urfaces.

3.1.1 Conservation of growth. Excavation shall be carefully performed in the proximity of trees and shrubs designated to be saved on the plans or as ordered. Any roots that have to be removed shall be cleanly cut, and the larger roots shall be p ainted with approved wood dressing or treated according to other accepted arboricultural practices. 3.1.2 Topsoil and other humus material. Topsoil and desirable humus material shall be removed in excavation areas and also in fill areas to such depths as the Engineer may direct. Such material shall be reserved and shall be stockpiled in accessible piles that can be measured readil y and accurately by the Engineer. Unless otherwise permitted, each stockpile shall contain a minimum of 200 cy, and have a height of at least 4 ft. 3.1.3 Material found in the roadway. Sand, gravel, or other materials found in the roadway may be used under the specific item in accordance with 104.04 when permitted. 3.1.4 Removing abandoned road surface . Old road surfaces shown or ordered to be removed shall be stripped neatly to the depth and width as shown on the plans or as ordered. 3.1.5 Drives. Drives shall be retained or constructed as shown on the plans or as ordered.

Rock Excavation.

When rock excavation is to be performed, the overburden shall be removed, or trenches shall be excavated through the overburden at the intervals directed, normally 25 ft., but in no case closer than 10 ft. apart to permit cross-sectioning of the rock in