HomeMy WebLinkAboutINTERSTATE LAND - ODP - 49-02A - CORRESPONDENCE - REVISIONS (7)All utilities within the most restrictive 100-year floodplain shall be designed to minimize or
eliminate infiltration of floodwaters into the systems and discharge from the systems into
floodwaters.
In the report please discuss the erosion buffer limits and how they will affect the design of
the bridge crossing and any other drainage features.
At time of PDP please use the Floodplain Review Checklist to aid in the development of a
complete submittal.
These comments were addressed on the ODP engineering drawings by JR Engineering and
submitted for review.
Department: Transportation Planning Issue Contact: Tom Reiff
Topic: General
Number:33 Created:11/12/2003
[11/12/03] No further comments.
Please see the response to comments provided by Cityscape in their response letter.
Department: Zoning Issue Contact: Jenny Nuckols
Topic: ZONING
Number:31 Created:ll/4/2003
[11/4/03] No comment
Please see the response to comments provided by Cityscape in their response letter.
The project is considered to be ready for a Planning and Zoning Board public hearing and it
has been placed on the January 15, 2004 Board hearing agenda. The following items are
needed by the dates indicated below:
1 8.5" x 11.0" reduced copy of each of the 3 sheets of the Overall Development Plans, by
Wednesday, December 31st
8 full-size paper copies (folded) of the 3 sheet set of Overall Development Plans, by Friday,
January 2"d
Please see the response to comments provided by Cityscape in their response letter.
Please be sure and return all of the City staff red -lined plans when you submit the above
documents.
Please see -the response to comments provided by Cityscape in their response letter.
Than
Mic el rake
JR Engineering
Page 5
9/8/03
Floodplain Management Comments
Susan Hayes
The floodway for the revised Cooper Slough/Boxelder floodplain has been adopted and will
be applied to this site as it develops. Please remove any reference to "proposed" floodway
on the drawings and in the report.
Show both the current FEMA floodplains (including Cooper Slough) and the revised
floodplain/floodway on the drawings. It's not clear on the ODP plan whether the floodway
line is shown in its entirety. Please use the work maps to correctly site the Cooper Slough
floodplain.
Since there are two regulatory floodplains (City and FEMA) analysis for both conditions shall
be required at time of design of any facility in the floodplain. Because a floodway is not
mapped in the FEMA floodplain, the floodplain is considered "no -rise". This means that you
can not cause a rise in the flood level off of your property without obtaining easements from
affected property owners.
Any changes that are made to the no -rise floodplain or in the recently adopted floodway (fill,
plantings, construction of buildings, culverts, channels, bridges, bikepaths, etc.) will need to
be modeled by a registered professional engineer to document no -rise. A $300 fee is
required if hydraulic modeling is necessary. Please use the City's Floodplain Modeling
Guidelines for the preparation of this analysis.
Please include the benchmark number and elevation being used for the site.
On Sheets 2 and 3 for the Overall Development Plan, what does "Future Extents of
Amended Floodplain Per JR Engineering" mean? This is not discussed in the report.
Please clarify.
There needs to be sufficient notes pertaining to the floodplain and regulations on both the
Overall Drainage Plan and Overall Development Plan sheets. Please add the following
notes to the plans:
Any residential structures in the floodplain must have the lowest floor including basement or
crawl space elevated 18" above the most restrictive 100-year flood level.
Any non-residential structures in the floodplain must either have the lowest floor including
basement or crawl space elevated 18" above the most restrictive 100-year flood level or be
floodproofed 18" above the 100-year flood level.
Critical facilities are not allowed to be built in the most restrictive 100-year floodplain.
Please see Chapter 10 of City Code for the definition of critical facilities.
A floodplain use permit and $25 permit fee will be required for each structure that is built in
the floodplain. To obtain a CO, an elevation certificate or floodproofing certificate will be
required to be submitted and approved.
A floodplain use permit and $25 permit fee will be required for any construction activity in the
floodplain including construction of the detention ponds and any roads.
Page 4
Topic: Floodplain Management
Number:4 Created:9/9/2003
[ 11 /17/03]
Interstate Lands ODP
11/11/03
Floodplain Management Comments
Susan Hayes
1. The floodway for the revised Cooper Slough/Boxelder floodplain has been adopted
and will be applied to this site as it develops. Please remove the reference to "proposed"
floodway in the report. (Repeat comment for report.)
The reference to `proposed" floodway has been removed.
2. Show both the current FEMA floodplains (including Cooper Slough) and the revised
floodplain/floodway on the drawings. It's not clear on the ODP plan whether the floodway
line is shown in its entirety. (Repeat comment.) Modify legend on the Overall Drainage
Plan. Add Floodway to legend on Sheet 2 of the Overall Development Plan. Floodplain
lines are still very difficult to see. A request has been put into the Engineer to provide a
version of the Overall Drainage Plan with just the floodplain lines so we can review it before
approval.
The current FEMA floodplain have been reviewed and altered accordingly. The linetypes
have been altered to enhance the line work and the legend has been revised accordingly.
Two revised (enhanced) floodplain and floodway maps have been provided earlier for
review and comment.
3. Please use the FEMA work maps to correctly site the Cooper Slough floodplain.
(Repeat comment.) It looks like the floodplain is still too far to the west and you have a
proposed detention pond located in the correct location. The work maps are located at the
Utilities office. Please contact Susan Hayes at 416-2233 to review them.
The FEMA floodplain has been revised to reflect more accurate boundaries per the FEMA
work maps.
4. Please check the benchmark number and elevation being used for the site. The one
shown on the plan does not appear in the City's list, unless it's a new one.
The benchmark used has been revised and provided on the Drainage Plan.
Page 3
Topic: Traffic
Number:35 Created:11/25/2003
[11/25/03] The proposed point of access on the Frontage Road nearest East Prospect
Road must be removed from the ODP.
Please see the response to comments provided by Cityscape in their response letter.
Topic: Utilities
Number:34 Created:11/25/2003
[11/25/03] Mike Scheid of the East Larimer County Water District indicated that red -lined
remarks were made on the included utility plan.
The addition of a proposed future water main extension going east under 1-25 has been
shown on the Overall Utility plan. Other comments are so noted and will be addressed at
the PDP stage.
Department: Engineering Issue Contact: Marc Virata
Topic: General
Number:32 Created:11/10/2003
[11/10/03] The ODP now shows an additional access point onto the Frontage Road
immediately north of Prospect Road that was not previously known. The access point is not
supported by Engineering and should be removed. Provided this access point is removed,
all previous comments appear to be addressed and Engineering considers the project ready
for a public hearing.
Please see the response to comments provided by Cityscape in their response letter.
Department: Stormwater Utility Issue Contact: Basil Harridan
Topic: Detention Pond Sizing
Number:11 Created:9/12/2003
[11 /17/03]
Please note that these requirements will need to be met at the PDP stage.
It seems that the detention ponds were sized using the rational method. At PDP SWMM
modeling will be required, this could have a significant impact on the size of these ponds.
The report proposes to release drainage waters from the detention ponds at rates matching
the 10 and 100 year storms. It is recommended by the master plan that a 2 year release be
done. The matching of the hydrograph in the 10 year storm and the 100 year storm as
proposed would only be acceptable if it can be demonstrated at PDP stage that no adverse
conditions are caused by such a release.
So noted. Thank you.
Page 2
January 2, 2004
Steve Olt
City of Fort Collins
Community Planning and Environmental Services
P.O. Box 580
Fort Collins, CO 80522
RE: Interstate Land ODP— Response to second round of comments
Dear Steve:
j-R ENGINEERING
A Westrian Company
Included below are the comments received from City Staff regarding the second round of
Overall Development Plans for Interstate Land. An explanation (in italics) of how issues
have been addressed follows each comment. These comments were received on November
25, 2003.
ISSUES:
Department: Current Planning Issue Contact: Steve Olt
Topic: Floodplain Management
Number:36 Created:11/25/2003
[11/25/03] Basil Hamdan of Stormwater offered the following comments:
a. The floodway has been adopted.
So noted. Thank You.
b. Stormwater wants a floodway/floodplain map.
JR Engineering has provided two copies of an exhibit detailing the floodways and
floodplains to Storm Water Utility for review.
C. Please check the benchmark elevation that was used.
The benchmark used has been revised and provided on the Drainage Plan.
d. The applicant is not using the 2-year storm. This must be shown at the PDP stage.
So noted. This will be addressed at the PDP stage.
Topic: General
Number:37 Created:11/25/2003
[11/25/031 Please see the red -lined plans from Current Planning for the outstanding
comments.
Please see the response to comments provided by Cityscape in their response letter.
Page 1
2620 Fast Prospect Road, Suite 190, Fort Collins, CO 80525
970-491-9888 • F= 970-491-9984 • w jrengineering.wm