ST0501-CS100804August 4, 2010
Lowell D. DeGroot, P.E.
GSWW, Inc.
11117 Shady Trail
Dallas, Texas 75229
RE: Deforest Road, Project #ST 05 -01
Construction Plan Review Comments
Dear Mr. DeGroot:
The City of Coppell has reviewed the referenced plans and has the following comments
to offer:
Typical Paving Sections Sheets -
1. On Section 7 +50 to 18 +25 and 23 +25 to 29 +55.1, slope should start towards bottom
of wall.
Paving Plan and Profile -
2. Eliminate BFR at 2 +00, 16 +30, and 26 +75 south and both north and south at sta
31 +48, or provide insight as to why needed (school bus drop - off?).
3. Add Flow Arrows.
4. Label all water work on paving plans as well as removals sheet.
Paving Plan MacArthur Blvd. Sheet -
5. Use detail 2140 for median nose. (stamped concrete)
6. Add striping throughout intersection not just new turn lane.
Drainage Area Map and Computations -
7. Please show Windsor Estates on map as well as lot lines for B -18 and such.
8. Why are bends not shown in calculations?
9. Where are you adding Kj values?
10. H. G. elevations for Line A don't seem to match profile.
Storm Sewer Plan and Profile Line A-
11. Check size of RCP's.
12. Add flow arrows.
Storm Sewer Plan and Profile Line B-
13. Add Flow Arrows.
Removal Plan -
14. Add cut & plug 18" Storm Sewer to other end at MacArthur.
15. At Allen Rd. show where to move FH.
Construction Phasing -
16. Can any phases run concurrently?
255 PARKWAY * P.O.BOX 9478 * COPPELL TX 75019 * TEL 972/462 0022 * FAX 972/304 3673
17. Specify during each phase what direction traffic will flow?
Striping Plan -
18. Show MacArthur Striping.
Standard Retaining Wall -
19. Need to add info on color and texture where applicable. Color & texture only where
visible to public or property owners. Will want to pull out of bid as separate item if
price too high.
Pedestrian Rail -
20. Rail will need to be powder coated black or earth tone. Not plain galvanized.
Paving and Driveway Cross Sections -
21. Show handrail where called for.
Additional Notes:
1)
Cover Sheet —
a)
Remove Mayor from sheet & shift Bob Mahalik to Mayor Pro -Tem.
2)
Estimated
Quantities — Not in this set.
3)
General Notes —
a)
Water Department # 972 - 462 -5155
b)
Streets Department # 972 - 462 -5150
c)
Remove erosion control details & notes from plan. We will only use what is
included in our standard details.
4)
Typical Paving Sections —
a)
See spelling & corrections in notes.
5)
Typical Paving Sections —
a)
Provide a detail of connection between retaining wall & sidewalk.
6)
Horizontal & Vertical Control —
a)
Remove 10x10 ROW clip from alley behind Lake Forest.
7)
Paving Plan & Profile 0 +00 — 3 +50 —
a)
Show what will happen with each and every mailbox.
b)
Add dimension width to all driveways.
c)
Check & review needs for manhole in MacArthur
d)
Reference paving sheet #
e)
We will need to reconstruct the ADA ramps at West Deforest.
f)
Is there enough room between Signal Pole & Ramp at SE corner.
g)
Remove BFR at south side Prestwick.
h)
Show grade lines from PCI to PCR.
i)
Straighten out Stamped concrete per city detail.
8)
Paving Plan & Profile 3 +50 - 8 +50 —
a)
Add note to 724 Deforest for contractor to install new wire fence w/ wood posts
like existing along new ROW line and for contractor to coordinate with
homeowner.
b)
Show rough location of water service to 748 Deforest.
9)
Paving Plan & Profile 8 +50 — 13 +50 —
a)
Show possible new water service location directly across the street. Due to paving
cut, existing service might get cut.
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b) Show where ex water meter at 10 +80 will be relocated outside sidewalk. (typ)
c) Check profile location for end of retaining wall at "11 +07 ".
d) Remove FH at 12 +20.
10) Paving Plan & Profile 13 +50 —18 +50 —
a) Modify plan so we don't need the rear 10x10 ROW clip on 592 Lake Forest.
(TYP, all sheets).
b) Look into how water will flow off Deforest and onto Cambridge Manor Lane.
c) Look into drainage on lots 820 & 822 Deforest.
d) Show relocation of FH at 17 +90.
11) Paving Plan & Profile 18 +50 — 23 +50 —
a) None
12) Paving Plan & Profile 23 +50 — 28 +50 —
a) Look at drainage on 844 Deforest. If curb is higher than ROW how will front
yard drain?
b) What would it take to eliminate retaining wall on north side of road?
c) Call for contractor to modify fence at 880 Brentwood to accommodate 10x10
ROW clip & to remove tree.
13) Paving Plan & Profile 28 +50 — 31 +56
a) Call out guardrail work on plan.
b) Adjust FH & valve to grade
c) Show fill slope to wall, use 4:1.
d) Will need to extend sidewalk on east side of last north driveway.
e) Show removal & replacement of at least 10 feet of pavement on Windsor estates.
f) Can not install storm sewer inlet over the property line. Redesign this adjacent to
the sidewalk.
14) MacArthur Blvd Paving plan
a) All thermoplastic striping needs to be 3M Stamark High Performance Patterned
Tape.
b) Add plans to remove & replace BFR on west side of intersection.
c) Show stamped concrete.
15) Waterline Plan
a) Show to reset water meter outside sidewalk.
b) Do you have a measure down to top of nut on waterline valves?
c) Can not cut into ex line with new Tee due to disruption of water service. Would
cause some residents to lose water.
16) Sanitary Sewer Plan & Profile
a) Why does the profile have left top of curb and not the centerline of pipe?
b) Waterline on Allen Road is shown to be a 10 ", modify all instances of this 8"
note.
c) Sewer seems shallow. Do we need a concrete cap or encasement?
d) Extend sewer service to new Row per detail 5120.
17) Drainage Area Map
a) Look into DA C -3 and see if we are exceeding alley capacity.
b) DA C -1 looks as though it drains to Cambridge Manor Lane.
c) DA A -4 looks as though it drains to Inglenook court.
d) Darken DA lines.
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18) Storm Sewer Calculations
a) HGL for Line A does not match profile.
19) Storm Sewer Calculations
a) Please provide hypothetical calculations that show the addition of a 36" pipe all
the way to the outfall.
b) Line C — can we reduce the HGL by extending the 36" further?
20) Storm Sewer P& P Line A 0 +00 — 3 +50
a) Show to cut and plug existing line under MacArthur.
b) Show to remove existing SD in Deforest.
21) Storm Sewer P& P Line A 3 +50 — 6 +66
a) Do we need an inlet on the southwest corner of 724 Deforest?
22) Storm Sewer P& P Line B 5 +50 — 6 +68
a) Show proposed ROW.
b) How will lot drain?
23) Storm Sewer P & P Line B 1 +00 - 5 +50 —
a) Show trees to be removed on all sheets
b) Move inlet off ROW line.
24) Storm Sewer P & P Line C 0 +00 — 4 +21.6 —
a) Add flow arrows.
25) Storm Sewer Lateral Profiles
a) Lat B -15 —smallest pipe is 18" RCP
26) Removal & Utility Adjustment 0 +00 — 3 +50 —
a) Show to Cut & plug Ex SD under MacArthur.
27) Removal & Utility Adjustment 3 +50 — 8 +50 -
a) On FH relocation, can we just shorten line & not disrupt pavement?
28) Removal & Utility Adjustment 8 +50 - 13 +50 —
a) Remove ex FH at 12 +20
29) Removal & Utility Adjustment 13 +50 —18 +50
a) Fix ROW clip
b) Show FH relocation.
30) Removal & Utility Adjustment 18 +50 — 23 +50 —
a) None
31) Removal & Utility Adjustment 23 +50 — 28 +50 —
a) May not want to remove culverts due to low area.
b) Adjust Fence
32) Removal & Utility Adjustment 28 +50 — 31 +56 —
a) Why cut & plug ex SD? Why not remove?
33) Traffic Signal Sheets
a) Fix City Logo — looks bad....
b) Typical City traffic signal plans are much less sheets. Please look into signals
previously designed by Lee for City. i.e. several Sandy Lake intersections.
c) Fix page numbers.
d) This project is in Dallas County, not Denton County.
e) It seems to me that the designer has designed this signal like the ones along SH
121. Those are not City of Coppell Signals. They are TxDOT signals and
maintained by the City of Lewisville. NOT COPPELL STANDARDS.
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e) It seems to me that the designer has designed this signal like the ones along Sh
121. Those are not City of Coppell Signals. They are TxDOT signals and
maintained by the City of Lewisville. NOT COPPELL STANDARDS.
f) Why go between Ft Worth TxDOT details and Dallas districs ? ??
g) SEE COMMENTS ON PLANS
58) Erosion Control Plan
a) Scale too small
b) Insufficient for use.
59) Suggested Construction Phasing
a) It seems that with very little temp asphalt, we could maintain 2 -way traffic during
Phase 3 Construction.
60) Traffic Routing Plan
a) Put Note about maintaining eastbound traffic from MacArthur for emergency
vehicles at all times.
61) Striping Plan
a) See 3M Stamark note.
b) Add signs necessary. This will be required by the contractor.
For remainder of comments see plans.
There may be additional comments throughout the plans that should be addressed. Please
make the necessary changes and submit these marked -up plans and two sets of revised
full size plans to the City for review. If you have any questions, please contact this
office at your convenience.
Sincerely,
George S. Marshall, P.E.
Office Phone: (972) 304 -3562
Fax: (972) 304 -3570
gmarshallgcoppelltx. gov