HomeMy WebLinkAboutSADDLEBACK SUBDIVISION, PHASES II, III & IV - COUNTY REFERRAL - 55-88, A - CORRESPONDENCE - OTHER JURISDICTIONSEngineering Department
A Commitment To Progress 1 221-7733
Post Office Box 1190
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��` �; Fort Collins, Colorado 80522
LARIMER COUNTY COLORADO \ \�
• ..;0 `\v � Operations and Planning Engineering
Q- v .� Elaine W. Spencer
Design and Construction Engineering
Ross QV. Shaw
MEMO -1-0: T. K. Uay, Planning
via Electronic Mail
FROM: El aine Spencer, Engineering U
DATE: June 29, 1988
F;E : SADDLEBACK SUBDIVISION - PRELIMINARY FLAT
PHASES II, III & IV
I have reviewed the plans and reports submitted and have the following
comments:
1. This proposal is located within the Urban Growth Area of the City of
Fort Collins and the current Intergovermmnetal Agreement applies. This
Agreement requires urban standards for all street and drainage
facilities. The street cross section proposed does not meet current
urban standards which require a 36; flowl ine section with curb, gutter -
and sidewalk: on each side. The required section provides for proper
drainage, pedestrian movement separate from the street; edge protection
for the asphalt and control 1 oed access to egch lot. This office has
consistently recommended an urban street section for subdivi=_ions with
lots of similar size and frontages as proposed in this development.
This office has also consistently recommended against a street section
with a. full width cross -slope rather than a crowned section. The
proposed section uses the street surface to convey water in a sheet flow
across the street and into the drainage Swale. Water is present on the
roadway during rain, lawn watering or snow and ice conditions. The
presence of water and particularly ice on the roadway presents safety
problems that could be minimized with a standard urban cross-section.
The section proposed provides for no shoulder or edge protection on the,
asphalt surface. Parking on this edge without provision of adequate
support will damage the roadway. In addition, allowing landscaping or -
grass to be planted up to the edge of the pavement increases water
infiltration into the subgrade and accelerates the rate of deterioration
of the asphalt along this edge.
The minimum recommended slope for a natural channel is 2%. A slope of
0.4% is acceptable if the channel is concrete lined. The 2% minimum
slope alleviates potential ponding problems or areas that drain slowly
BOARD OF COUNTY COMMISSIONERS
Courtlyn W. Hotchkiss C. Howard Zollner Daryle W. Klassen
District I District II District III
and become potential mosquito breeding areas.
Placement of the edge of pavement and sidewalk against the right-of-way
line does not provide adequate space on public right-of-way for proper
maintenance of either the sidewalk: or the pavement.
2. Final plans must include an agreement from each of the affected ditch
companies regarding accepting run-off from this development, the
crossing under the New Mercer Ditch and the box culvert across the New
Mercer Ditch.
3. I have no objections to a waiver from offsite road improvements
providing the recommendations of the Traffic Impact Study are followed
with construction of each Phase.
4. Phasing of this development extends an existing dead end street
without provision for alternative emergency access until Phase III is
completed.
c : Mike Herzig, City of Fort Collins
Mike -Jones, Northern Engineering
V I _