HomeMy WebLinkAboutLARKBOROUGH - Filed GC-GENERAL CORRESPONDENCE - 2004-08-27CITY OF FORT COLLINS P.O. BOX 580, FORT COLLINS, COLORADO 80522 (303) 484-4220 EXT 352, 336
CITY ATTORNEY'S OFFICE
November C.. 1976
Troutman Estate
c/o Milo Bunker
Post Office Box 471
Fort Collins, CO 80522
RE: Compliance with Larkborough Subdivision Improvement
Agreement
Dear Milo:
You have asked for an opinion from this office regarding
compliance by the owners of the Larkborough Subdivision with
Paragraph 5, subsection C of the Subdivision Improvement
Agreement between the City of Fnrt Collins and said owners.
Paragraph 5c of that Agreement specifically provides, in
part, that the developer understands and agrees that no
building permit shall be issued for any structure within the
subdivision prior to the written approval of the New Mercer
Ditch Company for the discharge of storm run-off from the
subdivision into the Ditch.
I received from you a copy of an agreement between the New
Mercer Ditch Companv and the owners of the Larkborough
Subdivision which, in part, provides that, whether or not
the ditch is eventually relocated, both parties agree that
the owners of the Larkborough Subdivision shall construct a
detention pond adequate to retain run-off water from the
development, to permit no more water at no greater velocity
of flow into the New Mercer Ditch than what presently
discharges therein from the existing pipe under the railroad
track. This provision would seem to satisfy the requirement
of that portion of the Subdivision Improvement Agreement
which requires the approval of the New Mercer Ditch Company
for the discharge of the storm run-off.
If there are any questions about this letter or if you need
anything further, please do not hesitate to ca11 me.
-IA A. LILE
ty Attorney
LAL/rr
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ENGINEERING DIVISION
September 15, 1980
P_O. Box SSO, Fort Collins Colorado 80522 Phi 103) 4,S4 4220 Ext. 728
Mr. Pon Marovich
ANN Development
582 Mohawk Drive
Boulder, Colorado 80302
I�.�S. iCrTi�i
This letter is formal verification that with the exception of the
detention system, the public improveirents in the First Phase of the
I,arkborough Subdivision are completed pending normal contractor
warranty periods. The First Phase includes all blocks and lots
south of Tract "C" and Tract "D", and all lots on Hummingbird Drive,
including Block 10, Lot 2 and Block 9, lot 32. Normal warranty periods
are one (1) year for water, sewer and streets and two (2) years for
concrete. Please feel free to contact me if you have any questions.
Sincerely,
r-
C)rI t
CTom Gathmann
Engineering Construction Inspector
--
(IIY OI IORI ( ()I I INS P.O. Box 580, Fort Collins Colorado 80522 Ph(303) 484-4220 Ext. 728
ENGINEERING DIVISION
October 15, 1980
Mr. Ron Marovich
ANN Development
532 Mohawk Drive
Boulder, CO 80302
Dear Ron:
On Friday, October 3rd, we discussed over the phone the urgency of
raising through the pavement two water valve boxes on GUillemont Street
in Larkborough Subdivision. You told me that one of your subcontractors
would be on the site Monday to perform the necessary work. No work
took place that week. We again talked on the phone Tuesday, October 14th,
at which time you said someone would take care of the problem the next
morning. At this time, the work is yet to be done. Therefore to protect
the uninternmted water service to those people living on Warbler Drive
north of Golden Lye Drive, I am putting a temporary hold on all building
permits and certificates of occupancy on Gualleront Street until the two
valve boxes are raised, and the valves operational.
Respectfully yours,
Inspector
_ Sf=RING DIYGION
7, 1980.
A
�P.G Lo+c Soo, fors Collin (.Wr,raJo�8Ci22 Phj3i)3 ;844220 Fxt 72r,
,Ir. Lloyd McLaughlin
!&I Cons lting Engineers
'710 College
Fort Collins, CO 80521
Re: Troutman Parkway in Tarkborou h Sub.
Laar Lloyd:
Confirming our telephone conversation of this date, the City does not
cash construction of Troutman Parkway to exceed the limits shown on
Sheet 14 of 33 at this time. This is twenty-five feet east of the
r;tch basin on the northeast corner of Troutman Parkway and Tanger Street.
`An nk you for contacting this office prior to staking this street.
Sincerely, /
Maurice E. Rupel, P.E. & L.S.
Assistant City Engineer - Develorment
Il (11 I l)I:I (()(I INNS 11.O. Rox DSO, I -or[ Collins, C_olor,rdo ; 01 22 Ph�303i 15-1-4120 Lxt. 728
NGINf-FRING DIVISION
December 4, 1980
Mr. Louie Housman, Vice President
Art Builders, Inc.
582 Mohawk Drive
Boulder, Colorado 80303
Re: Troutman Parkway - Larkborough Subdivision
Dear Mr. Hausman:
We have reviewed your letter of November 25, 1980 concerning the
future abandonment of Troutman Parkway from Tanager Street eastward
to the western right-of-way of the C&S Railway.
We cannot sign your letter as presented since, in fairness to you and
the Callopy Estate, the time for such abandonment is not well defined.
The City feels that it should reserve the dedicated right-of-way as
shown on the plat for a period of ten years. If by January 1, 1990,
the City has not seen cause to utilize the dedicated right-of-way
for transportation purposes, we feel Art Builders and/or the Callon,
Estate should request, in writing, that the City abandon said right-
of-way and if approved, this property would revert to adjoining property
in accordance with state statutes covering such abandonment.
Sincerely,
Maurice E. Rupel, P.E. & L.S.
Assistant City Engineer - Development
6
CITY OF FORI COI I INS P.O. Box 580 Fort Collins.Colorado 80522 Ph(303) 484A220 Ext. 72
ENGINEERING DIVISION
February 27, 1981
Mr. Dave Werner
Ann Development Corporation
2480 West 26th Avenue, Suite 30-B
Denver, CO 80211
Dear Dave:
I would like to recapitulate the main points of our discussion at
Larkborough Subdivision on Tuesday, February 24th.
To the best of my knowledge the detention pond needs seeding, the
placement of concrete trickle channels, rip -rap, and an engineer's
certification that it is built per plan before the City will accept it.
J�11 manholes and gate valves in Phase II are properly raised, but
(` compaction tests need to be taken to verify necessary subgrade
compaction around the six manholes that still need asphalt patching.
,The manholes and gate valves in Phase III need to be raised through
the existing base course for accessibility.
TL fire hydrant on the west side of Hummingbird adjacent to the
i,,•C� drainage way needs to be straightened.
Type III barricades as per specifications I gave you must be installed
on both ends of Troutman Parkway and the west end of Larkbunting Drive.
The existing curb cut providing access to the sales office from
Harmony Road must be removed and replaced with standard 6" vertical
curb and gutter.
On Harmony Road, the curb, gutter and walk must be extended to the
west property line, and the walk must be completed from Larkbunting
to the east property line.
For future reference, we are now requiring asphalt patching around
all manholes and water boxes that are raised through asphalt pavement.
The possibility of future abandonment of Troutman Parkway east of
Tanager Street will not affect the certificate of occupancy for
Lot 20, Block 1. The right-of-way itself, however, will not be
abandoned until January 1, 1990, at the earliest. Please refer to
Mauri Rupel's letter to Louie Hausman dated December 4, 1980.
Dave Werner
Page 2
Concerning the drainage way between Warbler Drive and Hummingbird
Drive, at this time we are open to several courses of action to
eliminate the problems associated with the steep side slopes
particularly the house south of the ditch on the east side of
Warbler. You mentioned utilizing the R.C.P. that was previously
removed from Troutman Parkway, and leveling the channel.
We will have to get together with Bob Smith or Marc Engemoen,
the storm drainage engineers, to reach a decision.
Please contact me if you feel something was omitted (or added)
from this summary.
Sincerely,
Cnt a 1�11z�ii-
om Gathmann
Engineering Inspection
14
(.IIy of FORI (()I I INti
ENGINEERING DIVISION
May 26, 1981
Mr. Frank Jones
Ann Development Company
582 Mohawk Drive
Boulder, Colorado 80302
Dear Mr. Jones:
P.O Box 5t
Fort Collins, Colorado 80522 _ _ Ph(303) 484-4220
I am writing to clarify the City's sitd6p, the drainage swale between
Warbler and Ilummingbird Drive dough Subdivision. We are very concerned
about potential erosion in thisr=ei'�TiS �'SiS�y o maintain it in the future.
When you and I met at the site some time ago, we agreed that the elevations and
locations of the houses adjacent to the channel probably prevent you from obtaining
an acceptable side -slope in the channel. I advised you to consult your engineer
regarding rip -rap for these areas.
I recently examined the rip -rap you installed and have some concerns. First of all,
rather than excavating the slopes before placing the rock, you simply armored the
existing slope. This constricts the channel in this section, and the configuration
may hasten erosion immediately downstream. During our meeting at the site,
I specifically stated that you should not place any rip -rap to further constrict
the channel. In addition, you placed a considerable amount of small,_ washed rock
on the remaining slopes. This rock is unstable and only aggravates the maintenance
problem.
Perhaps if I had been more specific originally, the problem might have been
corrected by now. At any rate, the following corrective measures must be under-
taken before the City can accept this channel for future maintenance.
(1) The maximum allowable side slope for earth lined channels is 4 to 1. At any
point in the channel where slopes are steeper than this, a slope treatment which
will address both stability and maintenance concerns must be used.
(2) In that portion of the channel where you have installed rip -rap, your engineer
should verify that the constricted channel's capacity is adequate, and should
evaluate it with respect to turbulence and additional erosion.
(3) Any rip -rap you place must conform to the City standards regarding size,
gradation, etc.
(4) Before doing any additional work on this channel, your engineer mist submit
a plan of the proposed improvements for our review and approval. This will
prevent the installation of any more inadequate improvements.
Frank Jones
Ann Development Canpany
Page Two
I apologize for my delay in preparing this letter. We are anxious
to work with you in resolving this matter, which has became the
source of a number of neighborhood complaints. If you have any
additional questions regarding this matter, please feel free to
call me.
Sincerely,
Marc Engemoen
Engineering
cc: Roy Kahler
Lloyd McLaughlin
Mauri Rupelc/'
Dave Stringer
MCI consulting engineers
4710 South College Ave. -Fort Collins. Colorado 80525
Telephone (303) 226-2323
Ann Development
M & I No. 1326-005
June 22, 1981
Mr. Marc Engemoen
City of Fort Collins
Engineering Division
Post Office Box 580
Fort Collins, Colorado 80522
RE: Larkborough Subdivision.
Dear Marc:
This letter is submitted to recap our discussions during a field
inspection. of the Larkborough Subdivision drainage ditch on June 18, 1981.
Others present were Tom Gathman, City of Fort Collins; and Dave Flores,
and Frank Jones of Ann Development Company.
Beginning at the lower end of the ditch, near the detention pond, the
Engineer is to verify that the side -slopes are within the 3:1 maximum.
If not, the Developer is to correct the situation to bring the slopes
within the acceptable tolerance.
That section of the ditch between Hummingbird and Warbler Drives is to
have rip -rap placed to the rear of the houses of both streets. The rip -
rap will be placed to conform to ditch geometries and well graded. A
fabric or visqueen was recommended for weed control within the rip -rap.
The remaining area of this section is to be graded to the maximum
side -slope tolerance of 3:1.
The ditch west of Warbler Drive to the west property line is to be
finish graded and verified by the Engineer. It was agreed that the
City would accept this portion of the ditch for City maintenance subject
to construction activity for houses along Coldeneye Drive.
M & I, Inc. will prepare a drawing of the ditch between Hummingbird and
Warbler Drives indicating the limits of rip -rap and specifications for
material and placement.
CIIYOf 1ORI (OI_I_INS
ENGINICI RING DIVISION
7anuary 4, 1979
P_O. BOX DSO. I OR F MI INS, COI.ORADO SOS 22
Mr. Sam Reiter, vice President
Wood Brothers Homes
2103 S. Wadsworth Boulevard
Denver, Colorado 80227
Dear Sam:
.. PH (303) IS4 4220
Re: The Woodlands, P.U.D. and
.The Iarkborough Subdivision
We ,ould like to take this opportunity to cone end Wood Brothers Herres
and you, particularly, for the manner in which you responded to our
requcst for a joint meeting between yourself, Art Builders, F.M. Fox &
7\ssociates, Soils Engineers, M&I Consulting Engineers, and the City.
We all expected that the difficulties outlined in your letter of
December 26, 1979 concerning sub rains within the referenced subdivisions
could be resolved upon a joint meeting between all parties concerned.
our nx,etinq of yesterday, January 3, 1980 justified our expectations.
To reii(-rate, you have agreed to seek an outlet for your subdrains
separate from the sulxlrain system established within the Iarkborough
subdivision. If this outlet cannot be accomplished by qravity flow
directly_ to "flail Creek (the natural draina(jeway for the area), you will
provide a wet -well and lift station system which will lift the subdrain
effluent to your detention pond which does, in turn, discharge into
P7ail Creek. Since the Dkxxilands is a P.U.D., the maintenance and
operating expense of the lift station shall be the responsibility of
i_he S*xxlI ands home moaners Ls
sociation in perpetuity.
Art Builders will rermve the clay dam between their subdrain system and
the Uallands P.U.D. when your subdrain system has a permanent outlet
as described above and will replace the clay with suitable backfill
so as to provide a suitable subbase for the street wherein the clay dam
now exists.
Prior to your permaanent solution, you have agreed to provide a temporary
DUMP to discharge vour subdrain at the surface to allow the subdrainage
system an outlet to tail Creek and provide relief for the present
subsoil saturation.
EXT. 728
Mr. Marc T'ngemoen
June 22, L981
Page 2
In addition, upon completion of the construction, all portions of the
ditch will be checked for comformance to the drawings and specifications.
If you should have comments or clarification of information contained
within this letter, please inform me immediately.
Your cooperation and assistance in this matter is sincerely appreciated.
Very truly yours,
M & I, INC.
16yd G. McLaugtrlin
LGM/jm
cc: Dave Flores, Ann Development
7
mom
ITY OF FORT COLLINS P.O. Box 580
ENGINEERING SERVICES
September 2, 1981
Milo Bunker
P.O. Box 27
Fort Collins, Colorado
Dear Milo:
Fort Collins, Colorado 80522
Re: Larkborough Detention Pond
To recap our telephone conversation of Wednesday, September 2, 1981
concerning the Larkborough detention pond, I stated the City would
accept the concrete drainage channel as it is now constructed.
However, you are to construct the rest of the channel to the west
inlet structure. Prior to this the fine grading and the seeding of
the pond can proceed.
The above, plus the following items which have previously been addressed
in my letter to ANN Development Canpany dated July 30, 1981, are to be
canpleted before the City will accept this pond for maintenance:
0 grout areas of poor concrete consolidation on the headwall at the
north end of the pond
• have your engineer suhmit a letter to the City stating the detention
systern has been built to the lines and grades as approved by the
City Engineer on May 7, 1979, and July 22, 1981.
Sincerely,
David Stringer
Chief Construction Inspector
cc: Mauri Rupel
Marc Engenoen
ENGINEERING DIVISION
Septenber 21, 1981
Mr. Frank Jones
ANN Development Company
582 Mohawk Drive
Boulder, Colorado 80302
Dear Frank:
I know the City is often quick to criticize and slaw to ccampliment
work done in conjunction with development in Fort Collins. I recently
inspected the work you did to clean up the earthen drainage channel
west of Warbler Drive in the Larkborough Subdivision. I was very
pleased; you have improved the channel-drcnnatically. I would like to
compliment both you and your contractor. I sincerely appreciate your
efforts to correct this drainage problem.
Sincerely,
Marc Engemoen
Engineering
cc: Blair Kiefer
( II) OI I( WI l OI I IA, P.O Box 580, Fort W]jni Co1ordJo 8052"_.
L NGINLLRING DIVISION
October 14, 1981
Tim Joswiak
ANN Development
582 Mohawk Drive
Boulder, COlorado 80303
Re: Larkborough Subdivision
Storm Drainage
Dear Mr. Joswiak:
A visual inspection of the storm drainage channel through the
Larkborough Subdivision has been made.
The portions of ditch located in Tracts "C & D" are satisfactory.
The City will accept this portion of the drainage system for
naintenance mending the normal one year warranty period. However,
this acceptance does not relieve you or your builders of the
responsibility of maintaining an unobstructed and properly
sloped channel.
Sincerely,
l
David Stringer
Chief Construction Inspector
Cc: Marc Enciemoen
October 16, 1981
Mr. Marc Engemoen
City of Fort Collins
Post office Be), 580
fort Collins, Colorado 80512
Re: Larkborough Subdivision
Storm Drainage System
Dear Mr. Engemoen:
Enclosed please find a copy of David Stringer's letter dated 10/14/81
regarding acceptance of the storm drainage system in Larkborough.
You will note that Mr. Stringer refers to City acceptance of the channel
"pending the normal one year warranty period". Based on our on -site
meeting with Prank Jones and Lloyd McLaughlin, it was my understanding
that the City would accept the system without the one year warranty
period, if we agreed to repair any damage caused by construction of the
adjacent homes in the subdivision.
As this situation has been an on -going concern of ours, we would
appreciate your feed -back regarding the storm drainage system as soon
as possil,le. Please contact me in Denver at 455-9436, or if I am
unavailable call Susan Peterson in our Boulder office at 499-8500.
Thank you,
ANN DEVELOPMENT COMPANY
By:
David Flores
DF/sgp
enclosure
ENGINEERING DIVISION
October 28, 1981
Mr. Tim Joswiak
ANN Develop -rent Corporation
582 Mohawk Drive
Boulder, Colorado 80303
Dear Tim:
The warranty period for the concrete work in the public right-of-way
in Phase I of Larkborough Subdivision has expired. Those areas that
were in need of repair have been fixed by Kiefer Concrete Canpany.
ANN Develojanerit, therefore, is no longer responsible for maintaining
these public improvements.
To avoid future confusion, we have been defining Phase I as all hones
south of the drainage channel except on Hunn ngbird Drive, where all
but two lots are included. (The two corner lots on Hummingbird and
Troutman have only the frontage on Hummingbird in Phase I.)
Sincerely,
Inspector
s
Co'llopy ct: al /11cw I,1orarr
Iri i.ch itclocrrliota -
�'il'.hoSnlu{ivi;ion
Please accept my apology for not sending you and/or New Mercer Ditch
Company a written communique concerning the bridge crossing the ditch
at the north end of the relocation project.
Mr. Dave Stringer, Chief Construction Inspector for the City, advises
me that he has inspected this structure and finds it acceptable. He
Aso--te_d it during the summpr Vp- ter ditch wa; running water and
after this years shut-off. i receiveo. Iast week, a copy of the
levels run on the ditch, by M&T for the three years of operation indi-
cating no erosion of the clay liner whisk was a concern of the ditch
company,
I have
checked with
Bob Lee who - responsible
for maintaining the ditch
and he
is satisfied
with the performance of the
ditch through the three
years
of operation.
It appears the ditch is performing in accordance with its design.
Sincerely,
Maurice E. Rupel, P.E. & L.S.
Engineering Services - Development
MER:ab
CITY OF [OR] ;,Ott INS P.O. Box 580 Fort Collins, Colorado 80522 Phone 484-4220 Ex. 723
ENGINEERING SERVICES
September 8, 1982
Mr. Louis Swift
New Mercer Ditch Co.
215 W. Oak, Suite 513
Fort Collins, CO 80521
Dear Louis:
This letter will summarize the conversation that took place on September 3,
1982, at the crossing of the New Mercer Ditch and Harmony Road. Present
from the City were Roger E. Krempel, Robert Smith and Tom Hays. Present
from the ditch company were Louis Swift, Shawn Hoff, Earl Stafford and Ron
Ruff.
The on -site meeting was called at the request of the ditch company to
examine the grate structure on the ditch on the north side of Harmony
Road.
The ditch company's concerns as I understood them are the following:
1. The present grate structure is not being adequately maintained.
2. Inadequate maintenance impairs the operation of the ditch causing
fluctuations in the water levels which has led to flooding.
The City representatives made the following proposals to the ditch company
to alleviate the problems.
A. The City will provide a two-way radio to Shawn Hoff so that rapid
communication with the City Street Department can be established when
problems occur.
B. The City will reconstruct the trash rack of sturdier materials and/or
design an automatic cleaning rack similar to those in common use in
wastewater treatment plants.
C. The City will investigate alternative cleaning points to reduce the
accumulation of trash at the present point.
D. The City will clean the grate frequently, giving special attention to
Friday afternoons and Monday mornings.
Mr. Louis Swift
September 8, 1982
Page Two
It is the City's intent to implement these actions prior to the next
irrigating season for items B and C, and to implement A and D as soon as
possible. The City desires to cooperate fully with the ditch company to
alleviate and avoid future problems to the stockholders of the ditch
company.
We appreciate the opportunity to meet with you and discuss your concerns,
and we will keep you advised of our progress.
Sincerely,
Thomas E. Hays, P.E.
City Engineer
sko
cc: Rgger E. Krempel
ob Smith
Bob Lee
Larry Schneider
CITY OF FORT COLLINS P.O. Box 580 Fort Cois.ons, Colorado80522 P-ione 484-4220 Ex.723
MfY4'VIYi44�pYM9: h.4i P.:MRC YM1iYI"'k11kk"b�gFT1.l:MrA"'f..4W11i44.4.Y,`T'M1"�^..5.ii\? FYtSW'�+'nl0fd^Ali'IIIY�HWYtlII
ENGINEERING SERVICES
October 20, 1983
Roy W. Kahler
American Builders
300 Troutman Parkway
Fort Collins, Colorado 80526
Re: Larkborough Subdivision
Dear Roy:
Recently, it has been brought to the attention of the City Engineer's
office that extensive asphalt street deterioration is occurring on
Goldeneye Drive adjacent to the new homes being constructed by
American Builders in the Larkborough Subdivision.
It is the City's opinion street failures are due primarily to excessive
physical abuse during the home building phase of the development. Even
though heavy equipment and some dirt and debris is expected during the
home building phase, the City holds the developer responsible for the
repair of any damages which may result from this construction.
The sections of street in question are exhibiting areas of alligator cracking
which does pose maintenance costs to the City. Therefore, we will not accept
those portions of street which are presently in need of repair due to the
home building activity.
Please be informed that the City will not release certificates of occupancy
for homes on Goldeneye Drive until such time as the necessary repairs have
been completed or arrangements have been made which are acceptable to the City.
Prior to the City accepting other alternatives the street surface is to be
cleared of the accumulated dirt and debris. This will enable Construction
Inspection to mark the limits and note the severity of the street failures.
After the repair areas have been identified, we will then be able to discuss
with you an acceptable type or types of repair based upon square footage of
surface area repair and severity of damage.
If you have any questions, don't hesitate to contact me at the City Engineer's
office, 300 LaPorte Avenue, or telephone me at 484-4200, extension 728.
er�'���Zt C/
David Stringer
Chief Construction Inspector
cc: Tom Hays
Felix Lee
�Ir. Snm I?oi t er
Page `It�O
m ill ol_ Iho .11o r, '`Y,;Q-to 11es is nof, in
rnrrl ✓ilh,�ur u, f urlirtrJ, plt,,ise wise us i � ,,ii O('IV.
Ry r„ q of This l cti_cr i Ash fa mprcas my gratitude to Art Ruiamn
Mr his (W rilvilitm to ,'u^ r,(,ling and ask his confilmition of the
nr�xx �hnrs oil] I itiod.
hank you for pour continuc>a c(x-),x,rd ion.
S ncs i elY,
stun-i_cc F. Rnix,l, P.1?. & T.S.
Ihwrl�,:h" nt I;ii,li,ir(rr
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SI0R%1 WAFER UIII_Il)
October 28, 1983
Robin Smith
4325 Hummingbird Drive
Fort Collins, Colorado 80526
Dear Robin,
Enclosed is the report I've written concerning the drainage channel
and the flooding problems near your home. I am recommending to the
Storm Drainage Board that the improvements which are outlined in the
report be installed to help reduce the problems which you, Mike, and
several other homeowners in the area are concerned about.
At this point I cannot say when or if the improvements will be installed
since there are currently no available funds to finance this project.
The next Storm Drainage Board meeting will be on November 9th at
7:00 A.M. in the C.I.C. Room at City Hall. (The C.I.C. Room is on
the main floor of the new City hall.) At that meeting the Lark -borough
channel will be discussed. You and the other homeowners in your
neighborhood are welcome to come to the meeting and express your own
concerns about the drainage problems in the channel.
I will not be able to attend the meeting so if you have any questions
about the report or the meeting, please call Bob Smith or Mick Mercer.
Also, please feel free to make comments on the report and when I get
back from vacation I will be happy to sit down and talk with you about
my recommendations.
Sincerely,
Bobbi Logan
Storm Drainage Engineer
Enc.
CITY OF FORT COLLINS
MEMORANDUM
DATE: March 26, 1984
TO: Paul Eckman, Assistant City Attorney
FROM: Bobbi Dunham, Civil Engineer I
RE: Larkborough Subdivision
Outlined below is some information about the Larkborough Subdivision
which should be included in your letter to M&I and American Builders.
1. The storm drainage system for the Larkborough Subdivision is
inadequate.
2. Four major problems which need to be corrected are:
a. Culverts under Hummingbird are undersized.
b. Inlet on Warbler is undersized.
c. Channel stabilization is ineffective between Warbler and
Hummingbird. The channel east of Hummingbird should also
be looked at.
d. Capacity of the channel has been reduced.
3. Require M&I and American Builders to correct the problems.
4. Request a plan and work schedule within 30 days. Require
completion of construction by the end of the year.
Please call me if you have any questions or need any further
information.
cc: Tom Hays
CITY OF FORT COLLINS
MEMORANDUM
DATE: March 27, 1984
TO: Roger Krempel, Director of Public Works & Water Utilities
THRU: Tom Hays, City Engineer
Bob Smith, Assistant City Engineer - Storm Drainage
FROM: Bobbi Dunham, Civil Engineer I 43D
RE: Larkborough Subdivision
Paul Eckman is in the process of writing a letter to M&I and
American Builders requesting them to correct several drainage
problems in the Larkborough Subdivision. This subdivision
was designed by M&I in 1978 and developed by American Builders.
Although the drainage system has been accepted for maintenance
by the City, it has not performed adequately. Four major problems
which need to be corrected are:
1. Culverts under Hummingbird Drive are undersized.
2. Inlet on Warbler Drive is undersized.
3. Channel stabilization is ineffective between
Warbler and Hummingbird. The channel east
of Hummingbird should also be looked at.
4. The capacity of the channel has been reduced.
I will keep you informed of the results of this action and if
you have any questions or need further information, please
let me know.
cc: Paul Eckman
CITY OF FORT COLLINS
April 3, 1984
Mr. Vic Meline
President
M & I Engineering
4710 South College
Fort Collins, CO 80525
American Builders
P.O. Box 284
Lafayette, CO 80026
RE: fLarkborough Subd— ivisio �j
Gentlemen:
Some time ago American Builders developed the Larkborough Subdivision
in the City of Fort Collins. M & I Engineering served as the design
engineer with regard to this subdivision. Recently, the City Engineering
Department brought to my attention certain inadequacies with regard to the
storm drainage system for the Larkborough Subdivision. Essentially,
there are four major inadequacies which must be promptly corrected by
either or both of you with regard to this subdivision. They are as follows:
1. The storm drainage culverts under Hummingbird Drive are under-
sized and must be enlarged.
2. The inlet on Warbler Drive is undersized and must be enlarged.
3. The channel stabilization between Warbler Drive and Hummingbird
Drive is ineffective and additional rip -rap or other stabilization
is necessary in order to insure the viability of this channel. Also,
the channel to the East of Hummingbird should be examined for the same
purpose.
4. Because of various design inadequacies, the capacity of this
channel has been reduced and must be increased.
OFF I('E Of HE CITY 300 LaPorte Ave • P.O. Box 580 • Fort Collins, Colorado 80522 • (3031 221-6520
ATTORNEY
Mr. Vic Meline
April 3, 1984
Page Two
Please be advised that the City requires correction of the aforemen-
tioned inadequacies by American Builders as the developer. I'm sure that
you can understand that the City's review of the plans which were submitted
by the developer, and prepared by M & I, is a conceptual review only and
that the City's Engineering Staff relies upon the developer's engineer with
regard to the overall adequacy of the design of the system. Accordingly, I
would request that a proposed plan and work schedule be submitted to me
within thirty (30) days of the date hereof. I would further request that
completion of construction of the aforementioned projects be accomplished
by the end of the 1984 calendar year.
Sinc
W. Paul Eckman
Assistant City Attorney
WPE:sw
cc: Roger Krempel
Tom Hays
Bobbi Dunham
Bob Smith
CITY OF FORT COLLINS
February 23, 1987
Mr. Vic Meline
Donohue and Associates, Inc.
4710 South College Avenue
Fort Collins, CO 80525
Dear Mr. Meline:
RE: Larkborough Subdivision Drainage Channel Modifications
This correspondence is to inform you that M&I/Donohue has met the
terms of the Agreement for the project referenced above, said
Agreement dated June 13, 1986. As stated in item 5 of the Agreement,
there is a one-year guarantee of the work to be provided by
M&I/Donohue, as independent contractor for the project.
Please feel free to call if you have any questions.
Sincerely,
W[CL - VX9Aut.
Michael H. Mercer
Operations and Maintenance Coordinator
MHM:sq
cc: Bob Smith
Gary Wolff, Simons, Li & Associates
Larkborough Subdivision file
700 Wood Street P.O. Box 580 Fort Collins, Colorado 80522 (303) 221-6615
DFPARTMENI 01
TRANSPORTA1101A
August 23, 1979
Mr. Maury Rupel, Development Engineer
City of Fort Collins
Engineering Department
P.O. Box 580
Fort Collins, Colo. 80522
RE: Detention Pond
Dear Mr. Rupel:
I would like to make a formal request for approval of the detention
pond as shown onthe approved plat dated May 10, 1979, with one omission
described as follows.
The "trickle channel" will be a dirt channel until we can determine
the exact amount of daily flow that is coming through this area. At such.
time as this is determined or two years from this date, the developer
agrees to concrete line the channel as shown in the above mentioned plans.
I believethis is necessary as the amount of underground water we
are experiencing; on the site at this time is more than anticipated by the
various engineers involved in this project.
Thank you for your consideration.
ab
Sincerely,
i--
/Milo L. Bunker, Agent
TROUTMAN ESTATE
F.M. FOX & ASSOCIATES, INC.
�/
4765 INDEPENDENCE STREET
F O X Consulting Engineers and Geologists WHEAT RIDGE, COLORADO 80033
(303) 424-5578 - FMFOX
January 8, 1980
"'r. Mauri Rupel, Development Engineer
Public Works Department
Post Office Box 580
Fort Collins, Colorado 80522
Subject: Summary of the Design Criteria and Construction Problems of the Under -
drain Systems for the Woodlands Subdivision and the Larkborough Subdi-
vision, located on Harmony Road, South of Fort Collins, Colorado
Reference: Our underdrain Design Feasibility Study for the Woodlands Subdivision
Job No. 1-1107-4293
Our Underdrain Specifications for the Proposed Larkborough Subdivision
Job No. 1-1107-3964
Empire Laboratories Report, Soils, Foundation and Geologic Investiga-
tion - Project No. 3448-79
Our Subsoil Investiq_ation for Larkborough Subdivision, Job No. 1-1102-
3383
Dear Mr. Heiter:
This letter is to summarize the design criteria and construction problems associated
with the underdrain discharge of the proposed Woodlands and Larkborough Subdivisions,
Fort Collins, Colorado.
F.M. Fox R, Associates originally designed an underdrain system to dewater- the pro-
posed !arkKqrcuqh Subdivisionfor
b.o st
snt construction „ mb� 1978. q
the course of our investigation work, we had designed the, system under the assump-
tion that that the City of Fort Collins would provide a positive discharge for the
constructed underdrain system from the east side of Larkborough Subdivision through
the railroad tracks to the east with the proposed trunk sewer- service that was to
serve: as the sewer outfall for both Larkborough and the Woodlands. In addition, it
was assumed that the water discharged through the drain system would be collected by
the City of Fort Collins for the irrigation of a proposed park to be located east
of the site. These assumptions were made on the basis of information supplied by
Mr. Jim Collins of Art Builders, Inc., and Mr. Lloyd McLaughlin of M & I Consulting
Engineers for subsequent planning in the overall sanitary sever plans for the pro-
posed subdivision. During the construction of this underdrain, the assumption was
still made that the connection would be provided to outfall the underdrain system
with the installation of the sewer line to the east. It should be pointed out that
the sewer line and underdrain had been constructed prior to connection with the
sewer line which was provided by the City of Fort Collins.
ALBUOUEROUE • DENVER • PHOENIX
Mr. Mauri Rupel
January 8, 1980
Page Two
In Julv, 1979, we were contacted by Wood Brothers Homes and Art Builders, Inc., to
determine the feasibility of connecting a proposed underdrain from Woodlands Sub-
division to outfall through the previously constructed underdrain in Larkborough
Subdivision. The basis on which we made our design recommendation and calculations
are summarized in a letter to Wood Brothers Homes dated July 27, 1979. We based
our recommendation that it was feasible to connect the underdrain and outfall of
the Woodlands to that of Larkborouqh on the assumption that the City of Fort Collins
would provide a discharge to the overall underdrain system with the construction of
the service line to the subdivision. Durina the course of our investigation and sub-
sequent to it, we were contacted by M R, I Consulting Engineers regarding the proposed
outfall. We received information that the outfall had been deleted for the underdrain
through the railroad truck embankment after the tie in of the Woodlands underdrain.
This necessitated an alternate discharge to the overall underdrain system which was
then investigated by M & I. M & I located an existinq 12 inch underdrain which paral-
leled the east boundary of Larkborough along Merger Ditch and discharged into Mail
Creek to the south. It was decided at that point in time to connect the Larkborough
underdrain system to the existing 12 inch line. However the invert elevation of the
existing underdrain was 3 feet below the invert elevation of the 12 inch line. This
necessitated the creation of at least: 3 feet of head so that the Larkborough under -
drain would discharge into the 12 inch line. Durinq the final construction of the
underdrain in the northern portion of Larkborough Subdivision, excessive amounts of
water had to be pumped from sewer excavations due to the increased flow of water com-
inq from both the southern portion of Larkborough and that discharge from the Wood-
lands Subdivision.
In order to decrease the amount of water that was being pumped in the underdrain sys-
tem of Larkborough, a blockage was constructed to terminate the discharge of the Wood-
lands underdrain through the Larkborough system. This created, as reported by the
City of Fort Collins, a condition where a build up of water ws occurring just to the
western boundary of Larkborouqh in the Woodlands underdrain system. Saturation of
the subgrade with subsequent seepage of ground water out on top of the ground surface
just to the west of Lark -Bunting Drive was noted by city inspectors.
On January 3, 1980„ a joint meeting was held between Wood Brothers, Art Builders, and
the City of Fort Collins with F.M. Fox & Associates and M & I being represented. As
stated by F.M. Fox at the meeting, the design criteria which was used to formulate
the feasibility of connectina both systems was based on the fact that the City of Fort
Collins was to have provided a positive gravity outfall for the systems. Since it
was not installed, the only feasible method of continuing the Woodlands underdrain
system through the existing Larkborouqh system, was to either provide a positive gra-
vity discharge from the Larkborough Subdivision with the 12 inch line, or continue
that underdrain out through the railroad tracks by the City of Fort Collins. The other
alternative to this discharge of the Woodlands, was to provide a separate discharge
line runninq to the south along the eastern property line of Woodlands Subdivision
with either a positive gravity discharge to Mail Creek or the installation of a lift
station to an existing detention pond with subsequent discharge. Additonally, the
cost associated with providing a positive gravity outfall for the Larkborough Subdi-
vision, as pointed out by Mr. Art Hansman, compared to that for providing a positive
Mr. Mauri Rupel
January 8, 1980
Page Three
positive discharae for the Woodlands, showed a significant cost differential and
at this time, it was decided that an alternate system, as described above, for the
Woodlands Subdivision would be pursued by Wood Brothers Homes, Inc.
We are available for consultation in the design of the proposed outfall to Wood Bro-
thers Homes concerning design criteria, calculated flow volumes, etc. Please call
should further consultation be required.
F.M. OX & ASSOCIATES, IN
Donald R. Clark, P.E.
Divison Manager
DRC/pcs
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;
qlf' O� hCQ�O�@
(:hyOi I M(()IIINS I'.O.PIK WO, I OR I I O I. I I%S. C OI.(A"A), 0, 12
I ::(;Im I[RIM; 1)1% NON
imiary 22, 1180
h
ArC F-Ii.1;, IT
182 rk>hwk Drive
11>uldcr_, 0-Ib✓ ila 80302
Re: Possible contxaminatecl �.,'zter
Ron:
1 '.1 )vo 1 xrn * <i by the that there is a very Txw)d
: hi it of I :yr..nit :w11(r_ in lour r,11T:lfno.lyil ,`_ulxl) is on.
r 0 - ill ,()I l `,'Oil [Wt .ill. c, I I-iK( f ,u t rnINMY IhIt
,u r„ <l. vill iAl Will ):p Am a -Wi al of 18 l "Ps. Ill, in0 Ihis
5�2 'Mhil i I' i, _ nt .✓i 11 11,)sh 11-- � 1, r- i iinr; )lx,rg with
1,i,.nl p 11 . J a 1_n r; ':, it 'r lin,lil_y.
2 ,),k Ihlt ,uu hiQuin nil (wr —Ors b))ildiny in your_ T:+rklrn_ough
uldivisinn of thir )n,l rx <,s;u,w3 lhnt the City will
kr rvl°ryihinq t sible to (',)rry out our pr ,erl Ices in Ilse fastest
all sa%t wly I*>,sible. I %wild apprrciate a Ilroje�,ted 3--nxrnth
of all. (urtificaf,as of occupancy revllosCed on nn
ilrlivi,lilnl 1sCrrcC basis.
Tf y(il eny ,lu,�stions, r Wva feel free to contact me at 484-4220
•xi,i28.
S i nl:, 1�elY,
I)r✓e SCri ngcs
u!)ief consLt_uction Tnstxctor
cc: Jim Ilihbnrd
?I-)ur_i Rulx l
I V1. 1A
M&I consulting engineers
4710 South College Ave. Fort Collins, Colorado 80525
Telephone (303) 226.2323
July 3, 1980
Mr. Lou Hausman
Art Builders, Inc.
582 Mohawk Drive
Boulder, CO 80303
Dear Lou:
I have discussed with the City X Fort Collins the use of headwalls
vs. end sections for the cult' is under Warbler and Hummingbird Drives
in the�rkborough Subdivisio Bob Smith of the City Engineer's
Office has v y pproved the use of headwalls with the condition
that wingwalls also be installed for protection of the banks. He also
indicated that the Colorado State Highway Department's M-Standard
would be acceptable for this type of construction.
I have enclosed a copy of the M-Standard for your reference.
Should you need additional information or assistance in this matter,
please contact me.
Very truly yours,
M & I, INC.
Lloyd G. McLaugh in
Encclls.
A.Cc: Maurice Ruppel, City of Ft. Collins Development Engr.
3
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