Alexander Ct-CS061228
DEVELOPMENT REVIEW COMMITTEE
ENGINEERING COMMENTS
ITEM:
Public Hearing) PD-220-SF-12, Alexander Court
( to amend the land
use designation on the Comprehensive Land Use Plan from Neighborhood
Retail to Residential Low Density and a zoning change request from C
(Commercial) to PD-220-SF-12 (Planned Development-220 Single Family-
12) with a Detail Site Plan, to allow the development of 26 single family
homes on 18.7 acres of property located along at the northwest corner of
Bethel Road and Denton Tap, at the request of John L. Hawkins, Mira Mar
Development Corporation.
STAFF REP.: Marcie Diamond PROJECT ID# PD-06-0070
DRC DATE:
December 28, 2006 and January 4, 2007
CONTACT:
Kenneth M. Griffin, P.E., Dir.of Engineering/Public Works 972/304-3686
COMMENT STATUS: PRELIMINARY FINAL REVISED
AFTER P&Z
See comments under Preliminary Plat.
DEVELOPMENT REVIEW COMMITTEE
ENGINEERING COMMENTS
ITEM:
Alexander Court, Lots 1-26 Block A, Preliminary Plat
, to allow the
subdivision of 26 single family lots on 18.7 acres of property located along at
the northwest corner of Bethel Road and Denton Tap, at the request of, at
the request of John L. Hawkins, Mira Mar Development Corporation.
STAFF REP.: Marcie Diamond PROJECT ID# PP-06-0071
DRC DATE:
December 28, 2006 and January 4, 2007
CONTACT:
Kenneth M. Griffin, P.E., Dir.of Engineering/Public Works 972/304-3686
COMMENT STATUS: PRELIMINARY FINAL REVISED
AFTER P&Z
Preliminary Plat
1.All drainage and utility easements should be a minimum of 20' width.
2.The floodplain should be tied down with dimensions on each lot. Also, please be
advised that the floodplain as shown, does not match Panel No. 48113CO115J, with
an effective date of August 23, 2001. In most cases, your floodplain across Lots 9-19
is about 100 feet off of what the floodplain is. If the actual on the ground survey
reflects that the floodplain should be in a different location, then you will need to go
through either a Letter of Map Amendment (LOMA) or a Letter of Map Revision
(LOMR) prior to developing this property as shown.
3.The right-of-way that is being dedicated at the southeast corner should be shown and
labeled as dedicated right-of-way.
4.According to the Streetscape Plan, there should be a 15 foot landscape easement
adjacent to Denton Tap Road and a 10 foot landscape easement adjacent to Bethel
Road. This will effect the location of the proposed screening wall. Also, please be
advised that when a screening wall is placed along Denton Tap Road, it needs to be
set back so that it does not encroach into the existing 20 foot and 25 foot sanitary
sewer easements.
5. In addition to the 15 foot landscape easement adjacent to Denton Tap Road, there
needs to be a separate 7 - 10 foot sidewalk easement. The sidewalk easement can be a
part of the 15 foot landscape easement.
6.Please show the required visibility triangles at all street intersections.
7. The minimum finish floor as shown on Lots 7 and 8 is incorrect. The City's
ordinance is two feet above the existing floodplain and one foot above the ultimate
floodplain. When you review our ultimate floodplain, the minimum finish floor on
Lots 7 and 8 should be 496, not 495.
Utility Plan
8.The minimum water line size in the City of Coppell is 8 inch, not 6 inch as shown.
9.Some of the radius of your proposed sanitary sewer may be too sharp, especially in
the vicinity of Lots 9 and 10.
10. Your plat shows that the existing 20 foot sanitary sewer easement will be abandoned.
Additional comments will be generated during the plan review on the actual technique
used to abandon the sanitary sewer after the easement has been abandoned. This will
require removal of the existing manholes and plugging the ends of the existing
sanitary sewer lines.
Site Plan
11.The preliminary construction plans for Bethel Road show a grade differential
adjacent to Lots 21, 22, and 26. Please be advised that prior to the installation of the
screening wall and the development of those lots, the correct grade that matches the
Bethel Road plans will need to be established.
Tree Removal Plan
12. It is very difficult to determine which trees are actually being removed adjacent to
Bethel Road. A listing of the trees to be removed would be helpful so that we are not
trying to save those trees that will be removed in the design of Bethel Road.
Landscape Concept Plan
13. As previously noted, a landscape easement is required along Denton Tap Road and
Bethel Road, which will require the relocation of the proposed screening wall. Also,
it was unclear on your details for the screening wall whether or not piers were being
proposed. Most screening walls built in the City of Coppell do have piers on 10 foot
center.
Additional comments may be generated upon detailed engineering review.