HomeMy WebLinkAboutGRIFFIN PLAZA - Filed GC-GENERAL CORRESPONDENCE - 2004-08-09MCI consulting engineers
4710 South College Ave. Fort Collins, Coloradc E052+
Telephone (303) 482-8249
June 17, 1977
Pat Griffin Co.
701 North College Avenue
Fort Collins, CO £50521
ATTN: Pat Griffin
Dear Pat:
The purpose of this letter is to give a brief explanation of the methods and
criteria involved .in the calculation of the storm drainage quantities for the
proposed Griffin Plaza site on West Prospect.
The bulk of the procedures, methods, and numerical constants were obtained
from the Urban Storm Drainage Criteria Manual, published by the Denver Region-
al Council of Governments. The "Rational Method" for determination of storm
runoff was employed in the study of the historical flows (2 year storm) and
the effects of a 50-year storm on the improved site. The site will be consi-
dered a residentiaL business area, however, the size and location of the pro-
posed buildings is undetermined. This necessitated the assumption of a "C'
value (runoff coefficient) of .72 for the improved area.
The contours used :in the determination of the historical flow were obtained
from an earlier site development plan for the area. When M & I surveyed the
area recently, it was found that a great deal of earthwork had been done, thus
altering the original drainage patterns. A new topographical survey was per-
formed and was used as the base for our site development plan.
It was determined that a detention pond was needed in order to maintain the
natural flows in Spring Creek, which is contiguous with the southern bound-
ary of the property. The sizing of the pond was accomplished by using the
"Mass Diagram" method for determination of storage.
If you have any comments or questions, please feel free to get in contact
with me.
Very truly yours,
M & I, INC.
John R. Hutchinson
JRH/ms
CC: City of Fort Collins, Engineering Department
COPY TO BING .AN, PENDING FILE
Colorado State University
Office of the President Fort Collins, Colorado
80523
July 5, 1977
Mr. Robert Brunton
City Manager
300 La Porte Avenue
Fort Collins, CO 80521
Dear Bob:
Recently it came to my attention that discussions are continuing concern-
ing runoff from storms into Spring Creek. As you know, Spring Creek
runs through property owned and controlled by Colorado State University
and this letter is intended to provide a matter of record for you con-
cerning our position on the Spring Creek drainage.
We have no objection to accepting runoff from the Pat Griffin property
located on the north side of Spring Creek and west of the railroad tracks.
The potential runoff from this property will in our judgment provide no
damage to the Spring Creek drainage north of the University property.
We do want to apprise you of our position concerning storm water running
into Spring Creek and flowing east through the underpass of the railroad.
It is my understanding the capacity of the drainage facilities on the
east side of the C&S railroad track right-of-way are inadequate to
accommodate potential runoff water volumes occurring from the infrequent
heavy storms which occur in the Fort Collins area.
Because of our understanding of the inadequacy of that drainage system,
we want to record here our concern and objection to the storm flow being
forced to back up through the railroad underpass onto our property.
Sincere l /yours,
C/ b Ay R. Ch4mb rlain
President
xc: Pat Griffin
Bob Burnham
L. T. Suber
1 i
t
lli
if ,;
r �)
CITY MANAGER
Pal 19r/ IFT " Gv.
9). C). y3ax 55 - poi c/V Colleyz
901E eoaini, eo[ozado sosz,
February 21, 1978
Mr. Roy Bingman
Director of Engineering Services
City of Fort Collins
300 LaPorte Avenue
Fort Collins, Colorado 80521
Dear Mr. Bingman:
). L
This letter is to confirm the conversations you had with Mr.
Gene Frink and Mr. Bill Bartran on Friday, February 17, 1978 in your
office. We agreed that considering the proposed site for the new Pat
Griffin Co. Office, it would be most advantageous to both us and the
City of Fort Collins to service this building with utilities as I
have listed below:
Number (1) - Sewer Service to be provided by tapping the present
sanitary sewer existing on Prospect Street.
Number (2) - Water Service to be provided by tapping existing
water main in front of site on Prospect.
Number (3) - Pat Griffin Co. will, at the same time as Items #1 &
#2 are completed, extend the water main presently in
Prospect Street to the south on Tamasag Drive to
where it is also out of Prospect.
This, we feel, can be accomplished all at one time and thereby
be the least inconvenience to the motorists using Prospect and will
eliminate any need for future construction activity being conducted
within the street right-of-way.
The coordination of this activity will be done with your
utility departments at your earliest possible convenience. Mr.
Bartran will be coordinating these efforts on our behalf.
For your further information it is the intent of the Pat
Griffin Co., which owns all lots in the subdivision except #10,
to re -plat lots #3 through #9 to accommodate one single building
of substantial size. This will be done immediately after the
completion of the above project, in any event by the first of
next year.
Yours very truly,
cc: Gene Frink
Bill Bartran
CITY OF FORT C 0 L L I N S
MEMORANDUM
DATE: February 22, 1978
TO: Don Parsons, City Engineer
4.
FROM: Roy A. Bingman, Engineering Services Director
RE: Griffin Plaza Subdivision
The Pat Griffin Company is requesting release of Lot 1 for a building
permit (adjacent to Prospect Street). As indicated in the attached
letter, they intend to replat the remainder of the subdivision to
accomodate a single large building, rather than the present individual
lots.
On this basis, if you see no problems with this procedure, please release
this lot for a building permit. If you have difficulties, please contact
me.
cc: Building Inspection
3a'7 -�ge-m ®,v-a®.
l9. box 55 - 70Y �M. eoccr,9e
901E Cofllni, eocoaac% 80521
February 21, 1978
Mr. Roy Bingman
Director of Engineering Services
City of Fort Collins
300 LaPorte Avenue
Fort Collins, Colorado 80521
Dear Mr. Bingman:
This letter is to confirm the conversations you had with Mr.
Gene Frink and Mr. Bill Bartran on Friday, February 17, 1.978 in your
office. We agreed that considering the proposed site for the new Pat
Griffin Co. Office, it would be most advantageous to both us and the
City of Fort Collins to service this building with utilities as I
have listed below:
Number (1) - Sewer Service to be provided by tapping the present
sanitary sewer existing on Prospect Street.
Number (2) - Water Service to be provided by tapping existing
water main in front of site on Prospect.
Number (3) - Pat Griffin Co. will, at the same time as Items #1 &
#2 are completed, extend the water main presently in
Prospect Street to the south on Tamasag Drive to
where it is also out of Prospect.
This, we feel, can be accomplished all at one time and thereby
be the least inconvenience to the motorists using Prospect and will
eliminate any need for future construction activity being conducted
within the street right-of-way.
The coordination of this activity will be done with your
utility departments at your earliest possible convenience. Mr.
Bartran will be coordinating these efforts on our behalf.
For your further information it is the intent of the Pat
Griffin Co., which owns all lots in the subdivision except #10,
to re -plat lots #3 through #9 to accommodate one single building
of substantial size. This will be done immediately after the
completion of the above project, in any event by the first of
next year.
Yours very truly,
cc: Gene Frink
Bill Bartran
pa719r;AF;" ri v.
(P. n. l3ox 55
'Doct eobin3, eoLoaado 80522
September 5, 1978
Roy Bingman
Director of Engineering Services
City of Ft. Collins
Box 580
Ft. Collins, CO 80522
Dear Roy,
This is to advise you that we intend to re -plat the Pat
Griffin Plaza subdivision lots three through nine into
one lot. I wrote you a letter on February 21, 1978, advis-
ing you of this plan, and this is to further confirm our
position on it.
It is most likely that the additional property will go to
CSU as a gift and I will insert a covenant requiring them
to "curb and gutter" Tamasag Drive from Prospect Street
southward to tie into their development.
I will further assure that the curb and gutter will be in-
stalled within five years by the Pat Griffin Co., in the
event the work has not been done by CSU.
If there are further Questions you may have regarding the
future of this subdivision, please advise and I will try
to "fill you in."
Enc: Copy of 2-21-78
letter from Pat
Griffin to Roy
Bingman
c
Mr. Roy Bingman
Director of Encineerinc
City of Fort Collins
300 LaPorte Avenue
F ort Collins, Colorado
Dear Mr. Binoman:
` This letter is to
Gene Frink and Mr. Bill
office. We agreed that
Griffin Co. Of1`ice, it
City of Fort Collins t
have listed below:
r-9f-I 117,
707 :�A' C 1L�4
Cowaado SDjZl
February 21, 1978
Services
80521
confirm the conversations you had with Mr.
Bartran on Friday, February 17, 1978 in your
considering the proposed site for the new Pat
would be most advantageous to both us and the
o service this building with utilities as I
Number (1) - Sewer Service to be provided by tapping the present
sanitary sewer existing on Prospect Street.
Number (2) - Water Service to be provided by tapping existing
water main in front of site on Prospect.
Number (3) - Pat Griffin Co. will, at the same time as items nl &
r2 are completed, extend the water main, presently in
Prospect Street to the south on Tamasag Drive to
where it is also out of Prospect.
This, we feel, can be accomplished all at one time and thereby
be the least inconvenience to the motorists using Prospect and will
eliminate any need for future construction activity being conducted
within the street right-of-way.
The coordination of this activity will be done with your
utilitv departments at your earliest possible convenience. Mr.
Bartran will be coordinating these efforts on our behalf.
For your further information it is the intent of the Pat
Griffin Co., which owns all lots in the subdivision except #10,
to,re-plat lots #3 through #9 to accommodate one single building
of substantial size. This will be done immediately after the
completion of the above project, in any event by the first of
next year.
Yours very truly,
v
i
cc: Gene Frink
Bill Bartran