DR9001-CS 900503L"ALLAS') Dallas Concrete, Inc.
/ ? 74
\ ~mu. ~21 J.PLACE, #631 (214)42~7~
May 3, 1990
Mr. James A. Koch, Jr., P.F.
PACHECO KOCH
Consulting Engineers
1012 Park Central VII
12750 Merit Drive
Dallas, Texas 75251
RE:
BOX CULVERT & STORM DRAINAGE IMPROVEMENTS
CONNELL SKAGGS ADDITION
COPPELL, TEXAS
Dear Mr. Koch:
Attached is our 3 page proposal to complete the drainage project. We
made several changes to the original plan, as follows:
1. From Station 23+28.06 to approximately Station 30+10 we plan to
move the culvert to the east side of the drainage easement.
2. The box culvert will be either as designed utilizing 4000 psi
shotcrete walls to 8' in lieu of class ~ concrete, or 10' wide
box with 4000 psi shotcrete walls to 4' with a ~' arch using
4000 psi shotcrete.
3. The transition at Sandy Lake is to be an extension of the two
36" RCP into the box culvert with a 8" shotcrete wall to seal
the end of the wall and the pipe, thus eliminating gabions,
fencing, guardrails, headwalls, and slope protection. The
existing ditch could be graded to an inlet at the beginning
of the box culvert.
Engineering calculations will be submitted if we are successful in
obtaining a contract.
Should you desire, the total project can be done for $350,000 on an
unbonded basis. If so, I believe that terms agreeable to both parties
can be worked out to assure payment of materialmen and subcontractors.
Cordially,
GHW:sts
ATTACHMENT
CONNELL SKAGGS ADDITION
BOX CULVERT BID ANALYSIS
MAY 4,1990
AIR FORM
STANDARD BOX BOX
BUCKELEW DALLAS DALLAS
WORK ITEM CONSTRUCTION CONCRETE CONCRETE
BOX CULVERT, INLETS, &
FENCE RELOCATION
UPSTREAM TRANSITION
TRENCH SAFETY
SUBTOTAL
ENGINEERING & GEOTECHNICAL
TESTING 1.5%
STAKING
INSPECTION 1.5%
TOTAL COST
$308 000 $308,000 $308,000
$15 000 $17 000 $17,000
$23 408 $45 000 $45,000
$28
$5
$5
$346 408
~000
~196
500
196
$370
$28
$5
$1
$5
000 $370,000
000 $29,000
550 $5,550
500 $1,500
550 $5,550
$386 300 $410 600 $411,600
DEDUCT BONDS
COST WITHOUT BONDS
($20,000) ($20,000) ($20,000)
$366,300 $390,600 $391,600
TIME TO COMPLETE 4 MONTHS 2 MONTHS 2 MONTHS