Construction of River Bank Protection Works on Left Bank of Alaknanda River in Village Maithana,District Chamoli

Amount

Excavation in Cutting in Soil

Excavation in Soil using Hydraulic Excavator and Tippers with disposal up to 1000 m: Excavation in soil with hydraulic excavator of 0.9 cum bucket capacity including cutting and loading in tippers, trimming bottom and side slopes, in accordance with requirements of lines, grades and cross-sections, and transporting to the embankment location with a lift up to 1.5 m and lead up to 1000 m as per Technical Specification Clause 302.3

Excavation for Structures

Ordinary soil

Excavation in foundation for retaining and breast walls in all types of soils and rocks including lead, lift and disposal of surplus material as per direction of engineer- in - charge

Up to 3m depth

Providing concrete for plain/reinforced concrete in open foundations complete as per drawings and technical specifications Clause 802, 803, 1202 & 1203

P.C.C. grade M 10

P.C.C. grade M 20

Providing concrete for plain/reinforced concrete in substructure complete as per drawings and technical specifications Clause 802, 803, 1202 & 1204

P.C.C. grade M 20

PCC grade M15

Providing and Laying reinforced cement concrete in substructure complete as per drawings and technical specification clause 800, 1205.54 and 1205.5

R.C.C. grade M30, Up to 5.0 Mtr

Stone masonry in cement mortar for substructure complete as per drawing & technical specification clause 702,704,1202 and 1204

Random Rubble Masonry (RRM)

Cement Mortar (1:5)

Backfilling behind abutment, wing wall and return wall complete as per drawing & technical specification clause 1204.3.8

Hand Packed stone filling in back of walls including cost of all materials, royalty, T & P etc. complete as per direction of Engineer-in-charge.(As per PWD Uttarakhand specifications).

Geotextile Filter (Laying of a geotextile filter between pitching and embankment slopes on which pitching is laid to prevent escape of the embankment material through the voids of the stone pitching/cement concrete blocks as well as to allow free movement of water without creating any uplift head on the pitching.)

Construction of Embankment with material obtained from Roadway cutting construction of embankment with approved materials deposited at site from roadway cutting and excavation from drain and foundation of other structures graded and compacted to meet requirement of Tables 300.1 and 300.2 as per Technical specifications Clause 301.5

Supplying, fitting and placing TMT bar reinforcement in substructrue complete as per drawings and technical specification Clauses 1002, 1005, 1010 & 1202 (The reinforcement steel shall be procured from original (primary) steel producers as per clause no. 2011.3.1 of MORD specifications (First revision'2014) and IS 1786:2008 clause no. 1.6)

Providing weep holes in stone masonry, plain concrete Retaining wall with 100 mm dia Perforated PVC pipe extending through the full width of the structures with slope 1(V):20(H) towards drawing face complete as per drawing and technical specification.

25mm Thermocol Fibre board for Filler expansion joint with 10 m spacing (amount including 10% wastage)

Environmental Monitoring (Pre-Construction)

Ambient air quality monitoring

Ambient noise level monitoring

Water quality monitoring of surface water/Drinking water

Environmental Monitoring (Construction)

Ambient air quality monitoring

Ambient noise level monitoring

Water quality monitoring of surface water

Water quality monitoring of Drinking water

Mitigation and Enhancement Measure Cost

Water Sprinkling by Water Tanker/Pressure jet pump at haul road to minimise the dust pollution during construction activities. It has been considered for at least 2 hours/ day for 100 days

Environmental Training

Environmental Management Plan Implementation training at site

M/s Arun Construction