Agenda

material remaining in the bottom of the trench 1s not disturbed.

If pipe is to be laid in embankments or other recently filled areas, the fill
material shall first be placed to a height of at least 12-inches above the top of
the pipe before excavation.

Pipe trenches shall be made as narrow as practicable and shall not be widened
by scraping or loosening materials from the sides. Every effort shall be made to
keep the sides of the trenches firm and undisturbed until backfilling has been
completed.

specified densities

3.02 EXCAVATION:

A. GENERAL:

1.

2.

The Contractor shall perform all work of any nature and description required to
accomplish the work as shown on the Drawings and as specified.

B. The Contractor shall protect the sub-grade beneath new structures and pipes from
frost penetration when freezing temperatures are expected.

PART 2 - PRODUCTS

2.01 MATERIAL:

A. CRUSHED GRAVEL:
The Gravel Road Base will be NHDOT - Item 304.3 Crushed Gravel, or Item 304.4
Crushed Stone (Fine Gradation).

ASTM D2922 ~=Test Methods for Density of Soil and Soil-aggregate in Place
by Nuclear Methods (Shallow Depth).

1.04 SUBMITTALS: IN ACCORDANCE WITH REQUIREMENTS OF
GENERAL SPECIFICATIONS, SUBMIT THE FOLLOWING:

Material test results performed by a certified laboratory shall be submitted to the
Engineer for all materials proposed for use on the project. If required by the
Engineer, samples shall be submitted for independent testing.

1.05 PROTECTION OF EXISTING PROPERTY:

SECTION 02300

EARTHWORK

PART 1 - GENERAL

1.01

1.02

>

G5 Oo 8

1.03

WORK INCLUDED:

The Contractor shall make excavations of normal depth in earth for trenches and
structures, shall backfill and compact such excavations to the extent necessary,
shall furnish the necessary material and construct embankments and fills, and shall
make miscellaneous earth excavations and do miscellaneous grading.

RELATED WORK:

Section 01110, CONTROL OF WORK AND MATERIALS

PART 3 — EXECUTION

3.01 INSTALLATION:

A. Work shall not be started until all materials and equipment necessary for their
construction are either on the site of the work or satisfactorily available for
immediate use as required.

B. _ The sheeting shall be securely and satisfactorily braced to withstand all pressures to
which it may be subjected and be sufficiently tight to minimize lowering of the
groundwater level outside the excavation.

SECTION 02252
SUPPORT OF

EXCAVATION

PART 1 - GENERAL

1.01

A.

WORK INCLUDED:

This section of the specification covers sheeting and bracing for support of
excavations. The requirements of this section shall also apply, as appropriate, to
other methods of excavation support and underpinning which the Contractor elects to

use to complete the work.

3. Footage counter
4. Test pressure
5. Sewer reach identification (street location, start MH and second MH)

D. PIPE DEFLECTION MEASUREMENT:

No pipe or fitting shall be permanently supported on saddles, blocking, or stones.

Branches and fittings shall be laid by the Contractor as indicated on the drawings, and/or as
directed by the Engineer. Open ends of pipe and branches shall be closed with PVC caps
secured in place with pre-molded gasket joints or as directed by the Engineer.

flexible repair couplings, or approved equal, of the appropriate size to fit the external
diameter of each pipe.

B. SEWER AND DRAIN PIPE BEDDING AND SAND BLANKET:
Sewer pipe bedding and sand blanket shall be as specified in Section 02300 EARTHWORK.
C. DUCTILE IRON PIPE:

Ductile iron pipe shall be used at sewer/water line crossings and conform to AWWA
C151/A21.50 & 51, Class 52.

D. SEWER SERVICE SADDLES: