ST9301A-CS 970115 DALLAS COUNTY tA
PUBLIC WOSKS
January 15, 1997
Mr. Ken Griffin, P.E.
City Engineer
city of Coppell
P.O. Box 478
255 Parkway
Coppell, Texas 75019
Re: Sandy Lake Project 91-838
(Coppell E. City Limits to Dallas City Limit)
Grated Inlet, Final Plans and Construction Estimate
Dear Mr. Griffin:
Enclosed you will find four different documents as follows:
A. A copy of a letter from Dallas County to Lloyd James of
Charles Gojer and Associates, Inc., dated November 26, 1996.
Please refer to page four and specifically the hi-lited
comment for sheet 23 that states "Dallas County prefers the
use of "Y" inlet instead of the grated inlet specified on this
sheet."
B. A copy of a letter Dallas County dated December 12, 1996 from
Mr. James stating the reasons for asking that we reconsider
our previous comment about the grated inlet.
C. Plan sheets number 1-35 and sheet number 112 which show the
Sandy Lake Road construction in your City. Please note on
sheet 10 that the subject inlet is right of station 63+00.
D. A copy of the engineers final construction cost estimate for
your information.
The purpose of this letter is to ask for your written desires with
respect to the grated inlet. Also please perform a quick review of
the plans prior to indicating your approval by signing the title
sheet. This is to inform you that I intend to hand deliver the
title sheet to various officials for signature prior to the end of
next week, i.e., January 24, 1997.
As always you may call me at 653-6423 if you have questions
concerning the above or any other feature of this project.
Sincerely,
.&
Irvin S. Griffin
Project Engineer
Enclosures
ISG/ fite:IRV:Griffin.#12
411 Elm Street Dallas, Texas75202 653-7151
PUBLIC WORKS ~'
November 26, 1996
Mr. Lloyd James, P. E., Project Manager
Charles Gojer and Associates, Inc.
Consulting Engineers
11615 Forest Central Dr. #303
Dallas, Texas 75243
RE: Sandy Lake Project 91-838
(Coppell E. City Limits to Dallas City Limit )
Final Plan and Contract Document Review
Dear Mr. James:
The following comments result from review of your submittal of Sandy
Lake Road final plans and contract documents furnished Dallas County
on October 30, 1996.
SHEET 1, Title Sheet
1. On the index and on the structural and civil standards number
the sheets consecutively. Civil standards will need to pick up
after sheet 75 in sequence, i.e., 76, 77,. ~
Sheet 2 (E. & Q sheet)
1. Basically this sheet (marked up sheet attached) requires a
detailed and thorough check before re-submittal. Several reasons
for this include the following:
a. Several corrections in item numbers, (Item Number 402
should be Item 4010 "TRENCH SHEETING AND BRACING") etc. are
needed.
b. Several corrections in descriptions (Item Number 464 should
be described as Reinforced Concrete Pipe Cl. III or C1 IV
as applicable) not describes as Pipe Sewers.
c. In several cases e.g., Lime Treated Subgrade, the items
should be listed under Contractor work instead of County
work.
d. Several items are missing, such as the handrail on the
retaining wall at the Bait Shop.
e. Most of the descriptions for the various fence items on the
E. & Q. sheet do not match the descriptions on plan sheets
10, 11, 14 & 15. Basically, the only fence to be reused is
the pipe rail fence. The other fence items (even the
temporary farm fences) are to be new materials. The legends
on Sheets 10, 11, 14 and 15 do, in fact, accurately depict
what is to be done. The pay item descriptions do not.
411Elm Street Dallas, Texas75202 653-7151
Mr. Lloyd James
November 26, 1996
Page Two
2. Check referenced sheet numbers across the top of the columns. An
example is that the conduit quantities are actually on Sheet 20
not sheet 19. ,
3. In addition to the marked up sheet and the above, we are listing
additional comments which may indicate a need for changes on the
E. & Q. sheets, on the plan or detail sheet showing that item,
in the contract documents or in the preliminary and revised
construction estimate you provided Dallas County on November 19,
1996.
ITEM COM~4ENT, CORRECTION, CHANGE ETC.
NO.
160 Specify class 2 which is measured by the S.Y.
340 Asphalt curb - Type B or D HMAC?
423 Blue Book page 631 says ret. wall to be measured by the
S.F. Look at page 632 under what is included for payment.
656 Blue Book page 1115 says measured by L.F. or C.Y.
421 Shouldn't this be Item 420 - concrete structures?
450 Railing: Don't we need a pay item for the hand rail on the
retaining wall?
514 Shouldn't this be Item 450?
247 Class 5 in Blue Book page 185 measured by the S.Y.
260 Both items should be Contractor work.
496 Sheet 11 says 1 each, sheet 13 says 2 each. Actually,
removal of old structure, large is by EACH. Pipe removal
payment is by the linear foot.
514 Check to determine if this should be Item 450.
530 Driveway asphalt - what type? E.Q. sheet says sheet 17 -
where on sheet 177
550 Item 550 is for chain link fence. Item 552 is for wire
fence. Gates need to be described in the Pay Item
description by width, i.e., 15' wide or 24' wide.
403 Blue Book page 535 says measured by the S.F.
464 These should be described as "Reinforced Concrete Pipe" not
pipe sewers.
474 What type of slotted drain? (Blue Book page 925).
Mr. Lloyd James
November 26, 1996
Page Three
SHEETS 4 & 5, TYPICAL SECTION SHEETS
1. Specific comments to particular Typical Sections are as follows:
a. Section 01:
1. Asphalt Curb; Type B or D?
b. Section 04:
1. Right of way width must be provided.
c. Typical Concrete Pavement Section:
1. Required density of Lime Treated Subgrade is 96% not
95%.
SHEETS 6-9 "SUGGESTED CONSTRUCTION SEQUENCING"
1. See our markups (attached) of the "SUGGESTED CONSTRUCTION
SEQUENCING', you provided in the contract documents. These
markups indicate that several items of work, e.g., Lime and Lime
Treated Subgrade previously identified "by County" should be
changed to indicate "by Contractor,,.
2. Change narrative on the plans to be consistent with the final
version of the narrative in the contract documents.
Sheet 10
1. Driveway right of station 66+10; indicate gravel surfacing
within the right of way. Remove (drafting) any indication that
the drive turns and goes east toward the Harrington Bait Shop.
2. Doesn't the median from 66+24 to 66+50 need to be "solid
asphalt"?
Sheet 16
1. Provide a reference to sheet where details for conc. apron can
be found.
Sheet 18
1. Quantities (concrete curb and gutter) are not accurately shown
on the E. & Q. sheet. Could they actually be indicated as on
Sheet 177
Sheet 19
1. We calculate 53.4 CY concrete for the retaining wall. Do you
propose pay item being by CY or by SF?
Mr. Lloyd James
November 26, 1996
Page Four
2. No pay items are set up for the Type C201 rail on top of the
retaining wall shown on the E. & Q. sheet for this retaining
wall construction.
3. Need to indicate how miscellaneous items such as 4" perforated
pipe, crushed stone and the filter fabric around the perforated
pipe, water stop etc. are paid. Blue Book page 631 says
retaining wall to be measured by the S.F. Look at page 632
under what is included for payment.
SHEET 20
1. Does electrical conduit on the bridge need to be rigid metal
instead of the PVC material you have specified? If so, provide
a separate bid item in the bridge quantities. Also, provide a
mechanism to handle expansion of the conduit on the bridge.
SHEET 21
1. Drainage Area map shows the Boat Ramp Road going through the
swale. Does this information match the information shown on the
Schrickel-Rollins Park Plans?
SHEET 22
1. Does Lateral A-1 empty into the "south" RCP only? Plans give
impression it dumps into both 33" RCP's.
2. Check the design of Lateral A-1 connection to Line-A. There
won't be much left in any of a joint of 33" pipe when the
connection is made in the field.
SHEET 23
SHEET 24
1. Several references on this sheet indicate design for the flap
gate is on Sheet 28. Shouldn't these reference be to Sheet 29?
SHEET 26
1. The connection of Lateral B-1 to Line-B will probably need an
entire 8' joint of 66" RCP since it's on such a severe skew.
Same for Lateral B-4.
Mr. Lloyd James
November 26, 1996
Page Five
SHEET 27
1. Dallas County prefers the use of "Y" inlet instead of the grated
inlet specified on this sheet.
SHEET 28
1. We require change in design of all laterals. The dimension shown
from top of curb to flow line of inlet is only 4.0'. In order to
avoid damage to the Reinforced Concrete Pipe during lime
subgrade operations we require a minimum dimension of 4.5'
2. For laterals A-4 and A-5 you need a length of at least 12' each
before plugging for future connection. Please correct length on
E. & Q. accordingly.
SHEET 29
1. Provide manufacturer for the flap gate.
2. Indicate how paid or provide separate pay items for the various
incidentals such as the gate itself, underdrains, select
backfill etc.
BRIDGE, GENERAL
1. Does electrical conduit on the bridge need to be rigid metal? If
so, provide a separate bid item in the bridge quantities. Also,
provide a mechanism to handle expansion of the conduit on the
bridge.
2. We believe that the street light foundations on the bridge need
to be a separate pay item from the street light foundation set
up on the roadways.
3. Should some of the Concrete Traffic Barrier be Type 2 instead of
Type 17
4. Regarding end diaframs, several sheets, i.e., sheets 53-59, have
a note stating to see details in the plans about end diaframs.
We are unable to find details in the plans for end diaframs.
Don't you propose using end diaframs (thickened slab)?
5. We note and accept your company's written reply concerning the
question about interior diaframs. However, several details or
sections in the plans still make reference to interior diaframs.
Please correct the opportunity for confusion.
6. On sheet 59; a detail labeled "03 sawed deck joint detail" is
indicated. Where is the contractor to saw the deck?
Mr. Lloyd James
November 26, 1996
Page Six
7. Sheet 75 is missing. Apparently this is a bridge removal sheet.
Will this sheet indicate precisely what is to be removed? Also,
need to note that care is to be used in removing the existing
hand rail and bridge beams that are to become the property of
the County.
8. How are preformed joint sealers paid?
9. Any additional or special permits that the contractor must
obtain?
10. Armor joints; what is the spacing and number of stud anchors?
11. Several comments for Sheet 39:
a. We acknowledge and accept your letter of October 28, 1996
concerning location of Bent 2.
b. Show route of proposed storm sewer Line A.
c. Show proposed elevations for Bent 2.
STANDARDS, GENERAL
The following are in addition to specific comments concerning
standards and details:
1. STANDARD 1003; cross out details not needed, i.e., detail for
bridge approach, if you propose using the design you provided on
Sheet 60.
2. STANDARD 1006; cross out items not needed; e.g. "Integral Curb",
"Integral Curb and Gutter" "Mountable Curb", etc. that are not
applicable to this project.
3. STANDARD 2001; should have expansion material along the back of
the inlet also? Why tie the sidewalk to the inlet? Also, does
the detail for sidewalk in Coppell match the City of Dallas
detail?
4. STANDARD 9009: detail on this sheet for street light foundation
is not current. For your information and use, see detail
provided in the attachments to this letter.
5. Need a standard (TxDOT) drawing for chain link fence and gates.
6. Need detail for slotted drain.
Cross Sections
1. Required scale is 1"=5' horizontal as well as vertical.
2. Sheet numbers at bottom right corner need to be corrected, i.e.,
1 of 17; not 1 of 75.
Mr. Lloyd James
November 26, 1996
Page Seven
3. X-Sections do not accurately depict proposed construction in
front of Harrington Bait Shop.
4. Cross sections for the swale excavation on Sandy Lake right of
way must be provided.
5. Indicate volumes and quantities for excavation and embankment on
each cross section.
Construction Estimate
1. Descriptions, units and quantities should be consistent with the
E. & Q. sheet and the Bid Proposal Sheets.
2. The attached marked up copy of your November 19, 1996 revised
submittal reflects suggested changes in the unit prices, as well
as various (not to be considered as all inclusive) comments
related to descriptions, item numbers etc.
3. Separate the items and provide subtotal for the various
schedules, i.e., Schedule I, Paving, Drainage and Bridge
Construction; Schedule II, City of Carrollton Reimburseables;
Schedule III, City of Coppell Reimburseables and Schedule IV,
Dallas County Road and Bridge District Number One Construction.
Contract Documents
As a result of your letter dated November 18, 1996 and our meeting
discussions of November 19, 1996, on November 22, 1996 I provided you
clarifications and instructions relative to the formatting of the
contract documents and bid proposal you submitted by letter dated
October 29, 1996.
The attached marked up copy of several sections (Special.Provision to
Items 4, 7 and General Notes) is an addition and supplement to the
mark ups provided you on November 22, 1996.
Proposal Documents.
1. Make corrections in item numbers, descriptions, units and
quantities consistent with the corrections needed for the E. &
Q. sheet.
2. Also, need to provide separate categories for Schedule I,
Paving, Drainage and Bridge Construction; Schedule II, City of
Carrollton Reimburseables; Schedule III, City of Coppell
Reimburseables and Schedule IV, Dallas County Road and Bridge
District Number One Construction.
Mr. Lloyd James
November 26, 1996
Page Eight
Due to the number of revisions required, you must submit a check set
review submittal of plans, cross-sections, contract documents and
proposal documents for final review prior to closing out your contract
for the referenced project. Total completion by December 20, 1996 is
desired and will be appreciated. As always you may call me at 653-6423
if you have questions concerning the above or any other feature of the
project.
Sincerely,
Irvin S. ' '
Project Engineer~
isg/jcn
Attachments: 1. Detail (8.5" X 11") for street light foundations
(1 page).
2. Copy of City of Carrollton narrative
specifications for Paving Stone (3 pages 8.5" X
11").
3. Mark ups indicating suggested corrections for the
following sections of the Contract Documents:
a. General Notes (6 pages).
b. Suggested Construction Sequencing Notes (7
pages).
c. Special Provision to Item 4, Scope of Work
(2 pages).
d. Special Provision to Item 7, Legal Relations
and Responsibilities (1 page).
4. Mark up copy of the E. & Q. Sheet (1 sheet, 24"
X 36").
5. Mark up copy of Revised Construction Estimate (3
pages).
fil~:IRV:838Gojcr.~36