ST9401-CS 980212P.O. Box 478
Coppell, Texas 75019
972-462-0022
February 12, 1998
Mr. Ulysis Lane, P.E.
Wier and Associates, Inc.
4300 Beltway Place
Suite 130
Arlington, TX 76018-1097
Denton Tap Road (ST94-01)
Construction Plans
Dear Mr. Lane:
The City of Coppell has received and reviewed the referenced plans and has the following
comments to offer:
1. Make corrections to title sheet to indicate the limit of construction for Denton Tap Road
from Cottonwood Creek to State Highway 121 Bypass.
2. The typical section with the free right turn lane should be for Highland Drive and Natches
Trace.
3. Make the corrections to the general notes as indicated on Sheet 3.
4. Straighten the alignment of the driveway exiting Andy Brown Park west parking lot so
that it connects 90 degrees into Denton Tap Road.
We need to discuss the reason why you are proposing to move the existing inlet and
concrete flumes on the west and east side of Denton Tap Road at the beginning of the
project.
Page 2
6. On the west side of Denton Tap Road, provide a note stating the 5' sidewalk needs to be
constructed at the time Denton Tap Construction. The sidewalk needs to be constructed
from the north side of Denton Creek Bridge north to the south side of Natches Trace
Drive.
7. Provide a north-bound free right turn lane for Natches Trace.
8. Show the location of Natches Trace with the appropriate median opening with left turn
lanes.
9. Provide irrigation conduits and electrical conduits between the median openings.
10. Provide conduit underneath Denton Tap Road for funire traffic lights at Natches Trace.
11. Specify prefabricated wyes for all storm drainage lateral connections.
12. Specify omni~ex joint material for storm drainage pipes.
13. On Sheet 25 of the Storm Drainage Plan Profile Sheet show the location of the existing
12" sanitary sewer line.
14. Provide an air relief and blowoff valve for the 16, water line where it crosses Denton
Creek.
15. Address the comments on Sheet 32 regarding the Hike and Bike trail underneath Denton
Creek Bridge.
16. There seems to be some discrepancy in the detail for the proposed railing on top of the
gravity retaining wall section. See Sheet 41.
17. Provide additional information regarding the wrought iron fence detail on the east side of
Denton Creek Bridge.
18.
There is concern about establishing the flow line of Denton Creek underneath the Denton
Tap Road Bridge. We need to discuss and see if there is any type of erosion protection
measure we can do to help maintain the flow line of Denton Creek.
19. The notes on the Cap Plan and Sections sheet S4 of 9 are not clear, please address and
make changes as necessary.
Page 3
20. Comments have been made throughout the contract documents for the paving and
drainage improvements for Denton Tap Road, most of the pages have been flagged where
we have a concern or a comment. Also, add an alternate bid for a 12' wide
trail to extend from the Hike and Bike Trail underneath the Denton Tap
Road Bridge into the park on the west side of Denton Tap Road south of Denton
Creek. The design criteria will be 6, concrete paving with 6" of stabilized subgrade. The
concrete should be reinforced concrete with #3 rebar on 24" centers.
There are various other minor comments throughout these plans. Once these comments have
been addressed, the revised set of plans should be resubmitted to the City for review. :f you
should have any questions concerning these comments, please feel free to contact me at ya~ur
convenience.
Michael A. Martin, P.E.
MAM/dmm