*[INCLUDE THE FOLLOWING FOR LOCATING UTILITIES]{.mark}*

Add the following after Section 637:

\$\$645.00A

######### Section 645.---LOCATING UTILITIES

Revised 25 January 2005

**Description**

**645.01** This work consists of locating and marking existing utilities
by excavating test pits to, or using electromagnetic devices, where a
physical conflict with proposed construction is suspected and the
location is ordered by the CO.

**Material**

**645.02** Materials for restoring the test pit area to its original
condition shall be replacement of the materials excavated or their
equivalent in newly furnished materials meeting the various applicable
sections of this specification.

**Construction Requirements**

**645.03 General.** Notify *[(insert name of local locator
service)]{.mark}* 48 hours prior to any excavation, at *[(insert phone
number)]{.mark}* to have the utilities marked in the field. Notify the
CO 48 hours prior to any excavation.

Exercise special care and extreme caution in order to protect and avoid
damage to any utility company facilities. Existing utilities have been
generally located and shown on the plans as they are believed to exist.
The Government assumes no responsibility for the accuracy of locations
shown on the plans. Locate and ensure the safety of all existing
utilities. Repair any damage resulting from Contractor's operations at
no additional expense to the Government.

Locate by test pit any utility that may be in conflict with the proposed
work. If a conflict appears to exist, then notify the CO in writing
immediately and provide information on the location and elevation of the
utility so that the CO can adjust the proposed work.

**645.04 Locating Utility.** Use electromagnetic devices to establish
alignment of utilities where applicable. When necessary, thread a metal
rod through non-metallic utility pipes to locate them. Where neither
method is feasible, locate the utility by perpendicular trench or test
pits.

**645.05 Excavation.** Excavate carefully so as not to disturb utility
at it\'s assumed depth. When excavating within roadway pavements where
traffic is being maintained, excavate by air-vacuum methods or
equivalent, keeping the area of disturbance to a minimum. Uncover the
utility sufficiently to make accurate measurements.

**645.06 Record.** Describe the utility found (size, material,
function), determine the elevation of the top of utility, and prepare a
field sketch of the pit. Indicate the date and the station and offset of
the utility, noting whether the baseline or the centerline of proposed
facility is being referenced. Submit 1 copy to the CO within 24 hours.

**645.07 Marking.** Mark the utility location by flags or paint.
Maintain the markings, including repainting faded or damaged markings as
ordered by the CO, for the duration of the project, or until the CO
determines that the markings are no longer needed.

**645.08 Restoration.** Backfill with original material, thoroughly
compacting the material with a mechanical tamper. Restore aggregate base
courses and pavement using equivalent materials and thicknesses. For
portland cement concrete pavements, use fast setting concrete. For
asphalt concrete pavements, cold patch, resurfacing of pit will be
permitted so long as, in the opinion of the CO, it is thoroughly
compacted.

**645.09 Acceptance.** Locating utilities will be evaluated under
Subsection 106.02.

**Measurement**

**645.10** Measure the Section 645 items listed in the bid schedule
according to Subsection 109.02.

For markings, do not measure maintaining the markings.

**Payment**

**645.11** The accepted quantities will be paid at the contract price
per unit of measurement for the Section 645 pay items listed in the bid
schedule. Payment will be full compensation for the work prescribed in
this Section. See Subsection 109.05.