Grapevine Creek-CS 910806 ALBERT H. HALFF ASSOCIATES. INC.
ENGINEERS* SCIENTISTS' SURVEYORS
DALLAS ~ ARLIN(;TOX* CHICAGO' t-'ORT VqORTH ,'
2--' 7.~ :c_~: August 6, 1991 '
AVO 10565
of Coppell
Coppell, TX 7'5019 .~/
At'tn:Ms. Shohre.~n. eshmand,-
Acting City~ngineer
Re: Gateway, Business Park - Estimated Construction Cost
Grapevine Creek Drainage Improvements
Coppell, Texas
Dear Shohre:
Please find enclosed a copy of the Bid Form and Change Order No. I for this project. It is our
understanding that the 2% project fee to the City of Coppell is to offset the City's costs for inspection.
The grading for this project is approximately 75% complete to date and has not required any inspection
to date. The grading inspection, if any, will be extremely minimal. The clearing and grading is complete
and required no inspection. The structural excavation has been completed and did not require inspection.
The accelerated schedule reflects the Contractor's cost for cutting the project time by 70 calendar days
in order to complete the project by the end of September and should simply reduce the City's costs. The
hydromulching will not require City inspection. The rock rip rap would require only a minimal amount of
inspection time, if any.
The items that we feel should be included in the inspection fee are the Class C 4000 psi
reinforced concrete for the structure, the galvanized pipe rail, the two rib-surface finish and the select
backfill. These items are all directly associated with the structure as opposed to the channel. The
contract total for these items is $108,440.00. A 2% inspection fee for these items is $2,168.80. Please
note that this contract time for this project is 60 calendar days.
If you have any questions, please contact me.
Very truly yours,
ALB~;;I-~H. ,I"IA~.FF ASSOCIATES. INC.
Patrick L, Acker, P.E.
/ii
Enclosures
cc: Wayland Threadgill, Catellus
Bill Gibson, Gibson & Associates
SLr' .-" ',Z-* ',2-. C.=',:._ :),~5-'Z". r,.-,'i E~5.TEV =5 F 5 --.--'.'=.-', '-2 ?'.5~'.=5 :-'.2 '.":.:'='
_;.tlESC~.aF :.P-.,2-~ET-,,..-nE * z,_:,:.-.
~ GATEWAY BUSLNESS PARK - GRAPEVLN'E CREEK
GRA_DLN'G AxN~ DRALNAGE
D.'NqT PRICE SCHEDU'LE
· ' .:':':i~hS"::;::i[:':~.::-: ':-::.::..:.'i':-:.;i::'ES~'??::../-.': !.'Urfit":..."i.~:.::'D~s:cripfiOn a-qd::Pfic'~.::/n:-Words:.:?.'. .--:-...'...:-PriCe.in--.-: i':' - Total. '1 .
.. :...(::i.N~[::.:.!~:~:~::.::'~ ::..'-Q~in~i~i(:::: :":"i:i:"-'.-:.!.:'::.'::' ~':~iJ~i:':' ':-:.~:.:" :'~-J. :'~-J!'.,:.:.": ':::.':(':-~:'-:i'i:}:.:..!':!-[J:!':.;'[:i::~:-i:':'.': :.':('.(--. i.. '?: '"-"-'- ::.' '.'Fig-u:r'fiS: 1- Amount '
1 26,000 C.Y. Unclassified Channel Excavation,
ii Including Excavation, Compaction,
Top Soil Removal and Replacement,
Clearing and Grubbing and
i Stockpiling, Complete
/~o~, Dollars
t and 7"~,-,~ _~ - /q;'tJ~- Cents
per Cubic Yard.
.-~
,'~ 2 1,400 C.Y. Rock Ri~ Rap, Including Toe Down
and Non-Woven Filter Fabric
-~ and /6/~ Cents
per Cubic Yard.
'1
· :: 3 1 L.S. Structural Excavation and Bac!~ll,
.s Includk. ng Excavation, Backfi!! and !'
Compaction, Complete in Place ///, ~o. oo ///.~ 2~c. cc!
Dollars
-, and A3o Cents
:.:. per Lump Sum. .[
:~ 4 150 C.Y. Class C, 4000 psi Reinforced Concrete
~ for Cut Off Walls, Complete in Place
i and .~/o Cents
.~ i per Cubic Yard.
SECTION 00140 - BID FORM 4 .
' GATE3,VAY BUSh-N~ESS PARK - GR.kPE~-NnE CREEK
G~G .kN~ D~AGE
'- U~ P~CE SC~D~E
.- (Continued)
. - {:- :.'.'.. ot~ -. ..
~ '-" ..:.N&:."."'.~.?-'' '.~:'Q~a~':-~::: '.:.~.:':-~:':;:...:'--~-?:. '-.~.~.~'::':~.'~-::.:.:-:-::~;:~:'..:..':::(.~:..~.:.:: :.:--~-::.:;::::::~:.'(:."::C-. :??:.':::::/: ~-;:-.':'7:.-:.:;'?:::'-:-~:-'.: ':::~-:"~i~es::':-.: -: -.~eunt
~} 5 130 C.Y. Class C 4000 psi Re~orced Concrete
for Slope, Block and S9I, ~clud~g
.~'~ Wok Dr~s, Complete ~ Place
':~ and ~o Cents
-~ per Cubic Yard.
~:~ 6 250 C.Y. Class C 4000 psi Re~orced Concrete
for Wek and Side Walls, ~clud~g
.4 Wa~ Dra~, Complete ~ Place
":~..: ~o ~~ ~ Do~ars 1~
- and ~ Cents ,
.~ per Cubic Yard. ~1
7 1 L.S. Sand Blast Surface Fi~sh, Comp!ere
~'>G Dollars ~3~,~o 3~ 3o.oo
and ~ Cents
· ~? per Lump Sum.
8 160 L.F. Galva~ed P~pe Rang, Comp!ere }
~ ~ Place ? I ~ ¢
and Mo Cents
per L~e~ Foot.
-~ SECTION 00140 - BID FOPuM 5
' ' 'N0i:."' ":':'i' Quantity. -."..:'":.:'::..-'.:':':'--':':.'-::77}-'.'.".'..::: .:..:.' .-:.': ;:.""'~i".":':-'.':::':/:::.:-' ::":-:.':; ':':.'-:':':.:'::" ". Figures -'
~ 9 6 Acres Grassing-Seeding or Hydromulch
(Bermuda Cover), Complete in Place
5'~,~.~, ~ - ~c7, ~3,~ Dollars
~ and x./~ Cents
per Acres.
.';
TOTAL BASE BD $
SECTION 00140 - BID FOILM
-i~ '~' 6
BID SUMMARY:
TOTAL BASE BID
G~KDING AND DRA~.rNAGE (itemq ! .-Z~'-ra 9) S 4/4, ~o. o o
": Quantities are not guaranteed. Final payment w;,ll be based on quantities
determined by measurement methods des~'..'bed for each work item. "
.a. 1. BIDDER ag-tees that all Work will be complete wirfnin ~ ~calendar days after
' the date when the Contract Time commences to nm as provided in parao.o-r'aph 2.3
of the General Conditions and said work will be completed no later than Auggusr 31,
1991.
BIDDER accepts the provisions of t~ke Agreement as to liquidated dan,ages in the
event of failure to complete the Work on time.
.:
--'2 2. Communications concerning this Bid shall be addressed to:
The address of BIDDER indicated below.
3. The terms used in this Bid -,vh/ch are defined in the General Condddons of ~.e
Construction Contract included as ,~art of nhe Conn'act Doc-mments have d~e
meanings assig-ned to them in tine General Conditions.
SUBMrlTED on p ~-,' ) ) -~ ,19 '1 I
': If BIDDER is:
An Individual
t3y.
(Lndi~,ddual's Name)
-:4'
-~' doing business as
Business address:
-:: Phone No.'
.2
· ., SECTION 00140 - BID FORM ~ 7
A Partnership
By
(Firm Name)
(general parzner) "
Business address:
Phone No.:
A Corporation
(Corporation name)
(stare of incorporation)
By fa.J[//,'~... ~', ~/,~-.. '?'.
(na_rne of pe~on aur~horized to s-.'gm)
(Tide)
(Corporate Seal)
,"~ ~.,~ (Secretm?')
Business address:
Phone No.: z/4t -
SEC'rlON 00140 - BID FORM 8
A Joint Venture
By
(Name)
(Address)
J By
(Name)
.-..
(Address)
(£achjoint venturer must sig-n. The manner of signing for each individual, parmersh/p ar_d
corporation that is a parr to r.h.e joint venture should be in ~.e manner indicated above).
o0o
SECTION 00140 - BID FORM 9
T~e of Firm:
Corporation b// Sole Prop~etorship OLker __
Address:
Phone N~ber ·
Nines ~d Tides of P~mcip~s"
I.R.S. Number:
SECTION 00140 - BID FORM 10
CHAuNGE ORDER NO. 1
July 18, 1991
Gibson & Associates, Inc. Project Gradin~ and Drainaee Improvements
11210 Rvlie Crest Gateway Business Park - Grapexdne Creek
Balch Sprines, Texas 75180 Coppell, Texas
Contract For Catellus Development Corp. Engineer's Project No. 10565
5429 LBJ Frwv. #600, Dallas, TX 75240 Contract Date Apr/1. 1991
This Change to the Contract shall become effective when it has been sigued by the Owner and the Contractor. This Change
Order is an authorization to proceed wSth the following items of work and is based upon the attached letter from Gibson &
Associates, Inc.
DESCRIPTION OF WORK
(See Attachment 'A')
The Contract Time shall be decreased (70) days as a result of the Work required in this Change. Ail requirements of the
original Contract Documents shall apply to the above work except as may be specifically modified above.
We hereby agree to the above change(s) as outlined and the Contract Sum and Time shall be modified as follows:
Contract Sum Time
Original Contract $ 414.080.C0 130 Calendar Da~
Pre~-ious Changes $ -0- -0-
This Change Order S 35.350.00 (70) Calendar Days
Total Changes to Date $ 35.350.00 (70) Calendar Dax~
Total Contract to Date $ 449,430.00 60 Calendar Da~
RECO~IEN-DED FOR APPROVAL: APPROVED:
Al-gERT H. HALFF ASSOCIATES, h'qC GIBSON & ASSOCIATES. ~-NC.
Engineer
By.~_ ;,(.~ f~.__ :'c...!;,._~ Project Manager BY
Tide Title
Date .j~//"-..-/~7' /,.?'"~, ...- L'; .." Date
APPROVED:
ATI'A~NT
Deduction Est.
Item # Quantity. Unit Description Unit Price Total Amount
4 (50) C.Y. Reinforced Concrete for Cutoff Walls S200.00 ($10,000.00)
6 (80) C.Y. Reinforced Concrete for Weir and $250.00 ($20,000.00)
Sidewalks
7 (1) L.S. Sand Blast Surface Finish S3,630.00 (S3,630.00)
TOTAL DEDUCTION ($33,630.£0)
Add Est.
Item # Quantity.- Unit Description Unit Price Total Amount
7A 1 L.S. Two Rub Surface Finish $2,390.00 $2.,390.00
10A 1 L.S. Accelerated Schedule S59,540.00 $59,540.00
1 lA 940 C.Y. Select Backfil! $7.50 $7,050.00
TOTAL ADD1TION S68,980.C~3
TOTAL THIS CHANGE ORDER $35,350.00
ALBERT H. HALYF ASSOCIATES. INC.
ENGINEERS' SCIENTISTS' SURVEYORS
DALLAS * ARLINGTON * CHICAGO ~ FORT WORTH
>':'~-'::~= Au~st 6, 1991 ~[ j I
AVO 1O565
Ci~ of Coppe~
P.O. Box 478
Coppell, ~ 75019
Attn: Ms. Shohre~hmand,
Acting C~ En~neer
Re: Gateway Business Park - D~ ~p Rap vs. Grouted Rock Rip Rap
Grape~ne Creek Drainage ~provements, Coppe~, Texas
Dear Sho~e:
We wish to request that grouting of the rock rip rap be eliminated as a condition to
the construction drawings approval for this project. As stated in our submittal of July 31,
1991, the rock rip rap gradation, indicated on the construction drawings, was selected based
on the design water velocity and depth in the channel and does not require grout to remain
stable. Dry rock rip rap will provide a roughness coefficient of 0.35 whereas grouted rock
rip rap provides a roughness coefficient of 0.25. The concrete surface roughness coefficient
is 0.15 and the roughness coefficient for the grass lined channel is 0.45. As you can see the
dry rock rip rap will provide a more effective transition between the concrete surface and
the grass lined channel. The grouted rock rip rap will increase the velocities in this section
increasing the possibility of stowing. In addition the dry rock rip rap provides a flexible
lining as opposed to a ridged grouted rock rip rap, again providing a more effective
transition between the concrete structure and the grass lined channel.
We would respectfully request that the dry rock rip rap (non-grouted) specified on
the construction drawings be approved.
If you have any questions, please contact me.
Very truly yours,
ALBERT H. HALFF ASSOCIATES, INC.
Patrick L. Acker, P.E.
cc: Wayland Threadgill, Catellus
Bill Gibson, Gibson & Associates