WA0101-BD050317BID PROPOSAL
ADDENDUM NO. 2
ADDENDUM NO:
PROJECT NAME:
LOCATION:
ISSUED BY:
TWO
STATE HIGHWAY 121 WATERLINE
(North Coppell Rd. to Denton Tap Rd.)
WA-01-01
Bid No. Q-0205-02
COPPELL, TEXAS
Birkhoff Hendricks & Conway, L.L.P.
Consulting Engineers
Dallas, Texas
ISSUE DATE: March 17, 2005
BID DATE: March 24, 2005
(revised)
On March 10, 2005 a Pre-Bid Meeting was held. Numerous items were discussed during the meeting.
However, only those items addressed by this addendum will be considered as changes to the project.
1. This addendum modifies and extends the requirements of the plans and construction specifications
for the above referenced project.
2. Staple these addenda to the inside of the rear cover of the construction specifications or bind it into
the construction specifications at the end of the Bid Proposal.
3. Note receipt of all addenda on the Bid Form located in the Bidding Documents, and also on the
outside cover of the envelope containing the Bid Documents.
CONSTRUCTION PLANS
Item No. 1 Sheet No. 1
The following notes shall be added to the General Project Notes:
17) ...The City has determined that all disturbed areas between Sta. 53+00 and 65+00 shall be replaced
with solid sod of similar grass type to that in existence when excavation work commences. As a
minimum, the contractor should expect to replace the pipe OD + 4' along the alignment between the
referenced stations. The City Inspector will make the final determination of the extent of replacement
with solid sod. Contractor shall use proper watering techniques in order to establish a healthy stand of
grass to the satisfaction of the City Inspector. Installation and maintenance of solid sod to the
satisfaction of the City Inspector is considered subsidiary to the project (no separate pay item).
28) All borings for installation of waterline materials, whether cased or uncased, shall utilize auger or
dry bore methods. For the boring crossing the SH 121 TxDOT ROW, refer to TxDOT standards as
included in Section 7 of the Specifications and as an attachment to this addendum.
29) The City will consider the utilization of Directional Boring methods and materials under Denton
Creek. No additional cost will be considered for this alternate installation method and payment shall be
made in accordance with the Bid Schedule Units and Prices.
30) Water line embedment materials shall be as shown on Standard Detail 3030 included as an
attachment to Addendum No. 2. The City desires sand embedment ora free flowing and granular nature
meeting the specifications of Item 2.1.8(f) of the Standard Specifications for Public Works Construction,
North Central Texas, Third Edition 1998, as prepared by the North Central Texas Council of
Governments.
Item No. 2 Sheet 13
The location of the "tee" connection with Line "B" shall be moved approximately 8-feet to the west.
Revised Sheet 13R is attached.
Item No. 3 Sheet 19
The location of the "tee" connection with Line "B" shall be moved approximately 8-feet to the west.
Revised Sheet 19R is attached.
CONSTRUCTION SPECIFICATIONS
Item No. 4 Section 7 TxDOT Permit
Add the attached eight (8) sheets to this section of the specification.
Item No. 5 Section 8 Revised Standard Details
Add the attached thirteen (13) revised Standard Detail sheets to the end of the Construction
Specifications.
O -Ol
WATER AND SANITARY SEWER INSTALLATIONS
1. GENERAL - Longitudinal water and sanitary sewer pipelines, shall be
placed on uniform alignment three (3) to ten (10)' feet from the right
of way line. The minimum depth of cover shall be twenty-four (24)
inches for non-plastic lines and thirty (30) inches for plastic lines.
If a ~nonmetallic line is installed, a durable metal wire or other
device shall be concurrently installed for detection purposes.
Each line may be installed with enough vertical fleiibility to prevent
excessive stresses; however, horizontal "snaking" of the line is
prohibited.
The utility agency shall place identification markers at the right of
way line in sufficient number for longitudinal installations and at
each highway crossing.
Ail paved side streets crossed by a longitudinal line within TxDOT
righ? of way must be installed as outlined in item #2 below.
2. CROSSINGS Highway crossings are to be installed.at or near right
angles to highway and must be installed with an encasement pipe.
Encasement pipe is also to be installed under normal center medians,
extend from the top of backslope for Cut sections, and five (5) feet
beyond the toe of slope for fill sections, unless an additional length
is required as outlined in the "TRENCH EXCAVATION AND PIT LOCATION"
specification.
Ail crossings under existing pavement must be installed as outlined in
the "CONSTRUCTION OF HIGHWAY CROSSINGS BY BORE" Specification.
The depth of cover for crossings shall be twenty-four (24) inches for
non-plastic pipe and thirty (30) inches for plastic pipe under
ditches. The encasement pipe must be a minimu~ of eighteen (18)
inches or 1/2 the diameter of the pipe, whichever is greater, below
the bottom of the pavement structure.
The encasement shall consist of a steel pipe around and outside the
carrier pipe and support the load of the ground above the pipe, the
highway, and the superimposed loads thereon, including construction
equipment. HDPE pipe with a SDR Ratio of 11 or greater may be used
for encasement of water service lines. The HDPE pipe must be a single
continuous piece'with no joints. The strength of the encasement pipe
shall equal or exceed the structural requirements for highway drainage
culverts covered under ASTM specifications.
3. ABOVE GROUND APPURTENANCES Fire hydrants, air release valves, and
other similar appurtenances should be located at or near the right of
way line. Ail fire hydrants will be equipped with breakaway bases and
should not be located in the sidewalk. Any appurtenances may not be
located any closed than 3 ft from the back of curb.
Pumps, wells, and other structures associated.with li'ft stations and
pump stations, will hot be permitted within the limits of TxDOT right
of way.
4. MANHOLES - The outside'diameter of the manhole chimney at ground
level shall'not exceed thirty-six (36) inches. The ~nside diameter of
the manhole for 'lines up to twelve (12) 'inches sha~l not exceed four
(4) feet. For any increase in line size greater than twelve (12)
inches the manhole may be increased a like amodnt... The manhole cover
shall be installed flush with the ground, meet HS-20 load
requirements, and weigh at least 175 pounds.
2
CONSTRUCTION OF HIGHWAY CROSSINGS BY BORING
1. GENERAL WATER JETTING OR JACKING WILL NOT BE PERMITTED. Ail paved
streets which are maintained by TxDOT must be bored & enc=sed.unless
it is specifically stated on the permit that an exception for open
cutting and/or no encasement is granted.
At no time shall the boring operation interfere with the traveling
public. The safety of the traveling public and maintaining the
integrity of the roadway is the primary concern.
2. Bore Pit Locations - No excavations for bore pits will be allowed to
be any closer to the edge of the pavement (travel lane) than' as
outlined in the ~TRENCH EXCAVATIONS AND PIT LOCATION" specification.
If the required clear zoned distance is closer than outlined in the
above mentioned specification, then appropriate traffic control
devices such as barricades, signs, barrel mounted guard fence and/or
concrete traffic barriers will be required as deemed necessary by the
TxDOT inspector.
No excavated material will be stored closer'to the traveled way than
the bore pit. ~11 pits'a'n~! trenches shall be backfill irm~lediat~ly
after the encasement and carrier pipes has been installed. Upon
completion of the backfill, all excess material will be removed from
the right of way.
3. METHOD OF INSTALLATION - Crossings are to be instaXled by the AUGER
or ~DRY" BORE method and shall be accomplished by use of a laser
sighted bore machine or a bore machine requiring a pilot hole. The
pilot hole will serve as the centerline of the larger diameter hole to
be bored. The use of water or fluids in the boring operation will only
be allowed for lubricating the cutting head.
The. boring operation shall be performed from the low or downstream
end. Lateral or vertical variation of the encasement pipe from the
proposed line and grade will be permitted only to the extent of one
(1) inch in ten (10) feet, provided that such variation ehall be
regular and only in one direction.
The encasement pipe shall be apDroximately the same diameter as the
bore hole. Overcutting in excess of one inch shall be remedied by
pressure grouting the entire length of the installation with a
mixture consisting of two (2) sacks of cement per yard of sand.
OPTIONAL WET BORE - The utility or contractor may request
installation by the Slurry or ~Wet" bore method. The approval
to wet bore is granted by the Area Engineer or his designated
representative on an individual permit basis. If the area office
allows wet bores in ~heir designated area, approval will be based on
bore size and soil conditions. Wet bores should be restricted to
areas of rock or other suitable material which will prevent the
sides of the bore hole from "caving in". A geotechnical report
may be required prior to approval. In no instance will wet bores
be allowed to exceed eighteen (18) inches in diameter.
The amount of water used for creating the slurry will be such
that little or no runoff is encountered. If, in the opinion of the
TxDOT inspector, at any time during the boring operation inadequate
conditions are encountered for performing the wet bore, the process
will be stopped and the bore will be completed by Auger bore.
The slurry material removed from the bore may not be used in the
backfilling of the bore pit.
2
QENERAL UTILITY INSTALLATIONS
1. GENERAL A. copy of the approved notice must be kept onsite at all
times during construction. Unless other arrangements are made with the
designated Texas Department of Transportation (TxDOT) Inspector, no work
will be performed on Saturday, Sunday, Holidays, or hours other than
standard working hours, utility lines shall be located to avoid or
minimize the need for adjustments to accommodate future highway
improvements.
All utility installations will be made without excavation or longitudinal
placement being made any closer than three- (3) ft from the back of
curb. No pavement cuts are permitted unless specifically stated on the
permit that approval is given to open cut the pavement.
No explosives shall be used within the limits of the TxDOT highway right
of way for utility installations.
2. COORDINATION OF WORK Failure to contact the person listed on the
approval notice as instructed may cause a delay in the utility work. If
the installation is within the limits of an active highway construction
project, the utility work must be coordinated with the TxDOT Contractor
and Inspectors. The utility work shall not cause any delay or
disruption to the TxDOT contractor or construction.
Locating existing utility, facilities and coordination with the owners is
the responsibility of the utility agency..
3. TRAFFIC SAFETY, BARRICADES, WAI~NIN~ DEVICES Traffic control and
protective devices shall be used and must conform to the TEXAS MANUAL ON
UNIFORM TRAFFIC CONTROL DEVICES for streets and highways. Ail
Barricades, warning devices, signs, flashers, and flag persons shall be
provided by the utility agency or contractor.
Traffic shall not be stopped at any time without use of a flag person.
Prior to beginning work, the traffic control plans must be approved by
the Area Engineer or his designated representative. Lane closures for
any utility work will not be permitted without prior approval of Area
Engineer or his designated representative. Lane closures are not
permitted during peak ,,rush hour" traffic times.
Vehicles, equipment, construction material and personnel not necessary
to the timely installation of the facility shall be kept as far as
possible from the traveling public. Any above ground obstruction or
bore pit located closer than the clear zone distances outlined in the
"Trench Excavation and Pit Locations" specification shall be protected
by barricades, metal beam guard fence and/or concrete traffic barriers
as deemed necessary by the TxDOT Inspector.
At the end of every construction day, all equipment and materials shall be
removed as far from the roadway edge as possible.
4. SURVEYING AND STAKING OF UTIAITIES .- Ail utility installations shall
be staked by the utility agency so that TxDOT may inspect the alignment
prior to start of construction. The ROW line is to be staked and the
utility installed based on a set distance from the ROW line. The
utility is ultimately responsible for the accuracy of the installation.
5. TIME PERIOD ALLOWED FOR INSTALLATION If the installation of the
work covered by this utility permit has not started within twelve (12)
months from the approval date, a written request for an extension must
be submitted to the District Office. It is expected that the
installation will progress to completion in an efficient manner.
However, if the work is delayed or abandoned for a period of one (1)
month or more, a written request must be submitted to continue under the
authority of the original permit.
6. FULL TIME SUPERVISION AND INSPECTION The utility agency shall
provide competent, full time inspectors or supervisors to be present on-
site during the installation. Also, the utility may be required to
provide a telephone number which someone may be contacted 24 hours i~
case of an emergency. The utility construction may be delayed or
stopped when it is observed by the T:cDOT Inspector that their is not a
agency inspector or supervisor present on the job site.
7. DEPARTMENT INTERVENTION - TxDOT has the right to take charge of and
to remedy any immediate hazard to the traveling public when it is
obvious the utility agency will not do so. Any costs associated with
TxDOT's action will be charged to the utility agency.
8. UTILITY ACCOMMODATION POLICY -' Utility installations within the TxDOT
right of way shall conform with the requirements contained in the TxDOT
utility Accommodation Policy, dated May 29, .1989, the Dallas District
utility Policy and the following industry policies.
k. Safety Rules for the. installation and maintenance of electric and
communication lines - National Electrical Safety Code.
B.Latest edition of the Rules and Regulations for Public Water Systems,
published by the Texas'Department of Health, Water Hygiene Division.
C.Gas Pipelines Title 49, C.F.R., Part 192, Transportation of Natural
and Other Gas by Pipeline: Minimum Federal Safety Standards and
amendments.
D.Liquid Petroleum Pipelines - Title 49, C.F.R., Part 195, Transportation
of Liquids by Pipelines and amendments.
E~Latest edition of the American Society for Testing and Materials (ASTM)
Specifications.
F.Latest edition of the AASHTO policy entitled "A Policy on the
Accommodations of utilities within Freeway Right of Way."
G.Latest edition of the Occupational Safety and Health Administration
!OSHA} Standards and Interpretations.
TRENCH EXCAVATIONS AND PIT LOCATIONS
GENERAL - No dirt from a trench or pit excavation shall be placed on
the roadway or shoulders. All equipment and stockpiled dirt shall
meet the safety clear zone distances listed below or have adequate
barricades and warning devices to.protect the traveling public...
Topsoil Shall be kept separate from other excavation material, and.be
replaced in accordance with ASPECIFICATIONS FOR BACKFILL.
Ail pits and trenches shall be kept free from standing water..If
trenches and/or bore pits are left Open for extended periods of time
without a continuous progression of work, the utility will be required
to backfill the trench and/or bore pits. Any other pit will not be
left open for more than a forty eight (48) hour period.
In all excavations where sloughing is likely to occur, shoring will be
utilized to prevent damage to the highway structure(s). The utility
ageDcy or contractor shall be responsible for maintaining trench
excavation protection as required by provisions of Part 1926, Subpart
P - Excavations,.Trencbing and Shoring of OSHA Standards. ;.. · ~
TRENCHING - Longitudinal installations must be placed as near ~a
uniform alignment to the right of way line as possible. Trenching
machine or backhoe may be used. A backhoe wii1 be required if a.
uniform alignment can't be'maintained by use of a trenching machine.
SAFETY CLEAR ZON~ DISTANCES - Minimum clear zone distances required
for trench excavations and bore pit locations are as follows.
For LrNCURBED Highways.
A. Thirty (30)ft. from. the edge of pavement (Traveled Lane)of
high-speed (More than 40 mph), high volume (More than 750
vehicles per day) highways.
B. Sixteen (16) ft* from edge of pavement of high-speed,
(Less than 750 vehicles per day) highways.
C. Sixteen (16) ft* from ramps.
D. Ten (i0) ft* for low-speed (40 mph or less) highways.
E. Ten (10) ft* for any paved intersecting side street's.
low volume
Five (5) ft MINIMUM from edge of any shoulder.
For CURBED Highways.
A. Thirty (30) ft from the back of curb for high-speed highways.
B. Five (5) ft from the back of curb, plus any additional distance
to clear sidewalks, for low speed highways.
C. Five (5) ft from the back of curb for intersecting side street.
GENERAL As soon as practical, all portions of the excavation shall
be backfilled. Trenches and pits shall be backfilled with the material
obtained from the excavation or from other sources. Backfill material
will be free from stones of such size as to interfere with compaction;
free from large lumps which will not break down readily under
compaction; and free from frozen lumps, wood or other extraneous
material. The TxDOT Inspector may reject any material containing more
than twenty (20) percent by weight of material retained on a three (3)
inch sieve.
The portion of top soil removed from the original excavation shall be
replaced, as nearly as feasible, in its original position.
DEPTH OF LIFTS - The portion of backfill below the top of pipe shall
be placed in uniform layers not to exceed eight (8) inches in depth
(loose measurement). Backfill above the top of pipe shall be placed in
layers not to exceed ten (10) inches in depth (loose measurement).
If th~ 5ackfill is to support a portion of roadwa~ )r embankment, then
the material will be placed in uniform layers not to exceed eight (8)
inches in depth (loose measurement).
PROCEDURE FOR COMPACTION - Each layer of backfill material, if dry,
shall be wetted uniformly to the moisture content required to obtain
a density comparable with the adjacent undisturbed soil and shall be
compacted to that density by means of mechanical tampers or rammers.
The use of rolling equipment of the type generally used in compactinG
embankments will be permitted on portions that are accessible, to such
equipment. Water jetting or ponding will not be permitted.
Special care shall be taken to ensure thorough compaction of material
placed under the haunches of .the pipe.
Cohesionless materials, such as. sand,..may be used for general
backfilling purposes. Compaction of cohesionless materials shall be
done with vibratory equipment.
RESTORATION OF RIGHT OF WAY - Prompt replacement of sod, removal of
debris, and any other restoration necessary to restore the right of
way to a condition equal to that which existed prior to the utility
installation will be required. In areas of erosion, the use of
stabilized backfill may be required. Should settlement or erosion
occur within six (6) months of the utility installation, the utility
agency will be required to reshape, reseed, and/or resod the area.
2
SECTION 8
CITY OF COPPELL
Revised Standard Details
z~
MATCH UNE STA. 52+00
N 7047015.6186, E 2428525.2527
47+00
TRANSMITTAL OF ADDENDUM
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INSTRUCTIONS:
Acknowledge receipt of Addenda in Proposal, on outer envelope of bid AND WITH THE FORM
BELOW FAXED TO (214) 361-0204, or e-mail apineda~bhcllp.com upon receipt.
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Addendum Acknowledgment FAX to (214)361-0204
I Acknowledge the receipt of Addendum No. 2
City of COPPELL, TEXAS
Project Name:
S.H. 121 Water Line
By Facsimile Transmission on this date:
March 17, 2005
Contractor's Signature
E-Mail Address:
Company Name
"PLEASE SIGN & FAX, THIS PAGE BACK"
(as verification that you received this Addendum)
(214) 361-0204 or Email Confirmation to apineda(~bhcllp.com
Total Number of Fax Pages: 26