Loading...
HomeMy WebLinkAboutSUNSTONE VILLAGE PUD - Filed GC-GENERAL CORRESPONDENCE - 2008-06-09CITY OF FORT COLLINS P.O. BOX 580 FORT COLLINS COLORADO 80522 PH (303) 484-4220 EXT. 305 ENGINEERING SERVICES DEPARTMENT October 5, 1978 Mr. Dennis Plouff Court -Square Investment Carpany 1301 Spruce Street, Suite 201 Boulder, Colorado Dear Mr. Plouff: Following our recent conversation concerning the drainage for the proposed Sunstone development at the northeast corner of Harmony and Timberline Roads, I examined our topo maps of the area and visited the site with Bob Smith, our drainage engineer. It seems that although you may have to fill the sump area adjacent to Timberline Road and undertake sane additional earth work in the southern portion, it should be possible to channel most of the drainage to the northeast corner of the site. At this point, however, there is no defined natural drainage way, but a rather large area of virtually level fields. It would appear, at least at this preliminary stage, that the most reasonable drainage plan would be to allow the storm runoff to outlet from the detention ponds into the ditch which runs along the north -south half -section line, and eventually into the drainage swale along the south side of Horsetooth Road. Of course, the use of this ditch and any off -site improvements which might be required would have to be approved by the off -site interests prior to final approval by the City. In reviewing the drainage for the site, we did not examine any runoff which might enter the site from the area to the west of Timberline Road, from the mobile home park, or any area to the south and east. However, the final drainage plans for your development would have to account for the passage of any off -site drainage through your property. In addition, I reviewed the drainage proposals for Foothills Park Resubdivision on Horsetooth Road hest of College Avenue. Because I am unable to ascertain all that transpired concerning the approval of the final drainage plans, any alterations to the current plans would probably have to involve re -analyzing the entire situation. In view of this, unless you have some specific alternatives in mind which you would like to discuss with us, I assume you will complete the installation of the drainage swale along the northern boundary of the subdivision as it is shown on the approved utility plans. 100% Recycled Bond it 0 connected; the extra pond capacity was taken into account so it is now included in the overall drainage scheme. The Stormwater Utility hired a consultant to update the Fox Meadows Basin Master Plan and to recommend design alternatives for the offsite flows from the south, which were not addressed in the drainage report for the first filing. Since the entire pond volume was included in that analysis, any revisions to the master plan, due to as -built conditions, is the responsibility of the developer and must be approved by the Stormwater Utility. Any coordination needed between the consultant (Resource Consultants Inc.) and yourselves is also the developers responsibility. Presently money is being held in escrow in -lieu -of installing the landscaping but the landscaping must be completed and established for a two year or two growing season time period before landscaping can be accepted and maintenance responsibilities assumed by the City. 6. The City will not finally accept or maintain the drainage channel along the northern boundary of the site until such time as all construction is complete and the landscaping has been established. This does not mean the developer will not be reimbursed for completed portions of the construction that was identified in "Exhibit B" of the development agreement. For instance the grading of the channel is complete but the channel has not been accepted, therefore reimbursement can be made for the channel grading which was included on Exhibit B for filing one. The channel will be accepted only after all improvements are in as identified on Exhibit B of future filings. Of the items you listed in your letter the following were included in Exhibit B for filing one: - grading and sloping of the detention pond, - construction of the outfall drain from the detention pond and lowering of the Fox Meadows storm drain, - grading of the channel along the north boundary of the site, - installation of the 24" diameter storm drain along the northern boundary, - installation of the culvert pipes crossing Caribou Drive. These items are eligible for reimbursement in accordance with Section 26-545 of the City Code, which lists the submittal requirements for reimbursement. The two submittal items usually overlooked by developers are (1) the three completed bid forms and (2) letters from the contractor and engineer certifying that final payment has been received. Also, it is very important that all invoices are clear on what is being billed for and which portions on the invoice apply to what line item on the development agreement (Exhibit B). Please be advised that there will be a minimum of two weeks processing required after the invoices have been verified. Additional submittal items that will be required are survey notes construction plans and brief description of why the Fox Meadows storm drain had to be lowered. %W u We sincerely hope that this information is what you need. If you should have any questions, please advise. Sincerely, za'o /—Q/ -4� Glen Schlueter Civil Engineer cc: Glenn Stephens 0 w..► r vd CITY OF FORT COLLINS DEVELOPMENT SERVICES — ENGINEERING May 5, 1988 Flatiron Paving Company Attn: Mark Bower P.O. Box 504 Fort Collins, CO 80522 Re: Water line Repairs - Sunstone Village 1st and 2nd Dear Mark: Several water line repair items in the SUnStOne Village let and 2nd subdivisions have been brought to my attention by the City Water Department. As there has been some verbal communication with Flatiron Paving any as to these items, I am now giving you a full listing of items and a time table to complete the repairs. The items are as follows: 1. Raise fire hydrants at 2913 Sunray Court and 2548 Sunstone Drive. 2. Uncover water valve boxes at 2548 S7uLstone Drive, south side of street and on Caribou Road between Sunray Court and Flagstone Court. 3. Center valve box over valve at 2455 Sunstone Drive. 4. Turn fire hydrant so it is perpendicular to the street at 2454 Sunstone Dr. 5. Straighten fire hydrant and replace broken weather cap at Caribou Road and Stony Creek Drive. ENGINEERING Flatiron Paving Company May 5, 1988 Page 2 Due to the importance of these repairs, we are requiring them to be completed by the end of the work day on May 20, 1988. Failure to have these repairs completed by the 20th of May may affect the release of all Building Permits and Certificates of Occupancy on both of the above mentioned subdivisions. Thank you for your timely response on these item. Sincerely, ck Rich Construction Inspector cc: D.E. Burns Construction Schmidt Earth Builders Terry Popejoy - Water Department \✓ Dennis Plouff Page n-70 Also, I understand that there may be some change in the outlet for the detention facilities for Foothills Park Resubdivision as the result of a request by the New Mercer ditch company. I trust you will provide the City with a copy of the proposed changes to be reviewed and approved prior to their construction. Wood Brothers Homes has indicated that they will be unable to complete the outlet for the detention facilities for the Seventh Filing of Woodwest Subdivision until these changes are effected, so I would appreciate your prompt consideration of this matter. If you have any further questions regarding any of these items, please feel free to contact me. Sincerely, t97- W/cm `r *so CITY OF FORT COLLINS OFFICE OF DEVELOPMENT SERVICES, PLANNING DEPARTMENT January 29, 1987 Mr. David Shupe c/o Landmark Engineering 2300 West Eisenhower Blvd. Loveland, CO 80537 Re: Sunstone PUD, Cul-De-Sacs - Request for Variance Dear Dave: We have reviewed your designs for the proposed cul-de-sacs in Sunstone. Although there are advantages that you presented, we have decided that the problems created for the maintenance and operations are more important. Therefore, we do not support your request. We want you to use the standard circular cul-de-sac design. Several of us in the Planning and Engineering departments met to review your design proposals. We also had our street maintenance people comment. I checked with the City of Loveland staff to see how they felt your designs worked there. From all of the information gathered, our conclusion is that the flowline radii would have to be increased to keep from having to use more expensive methods of sweeping and snow plowing. The 35' standard radius that we have provides what we want. If you have a problem in just an isolated situation, we will be glad to work with you to solve the problem. But, with your proposals for Sunstone, we do not see any situations where the standard will not work. Sincerely, Mike Herzig Development Coordinator xc: Ted Shepard, Project Planner Jim Newell, Civil Engineer I OFFICE OF DEVELOPMENT SERVICES, PLANNING 300 LaPorte Ave. • P.O. Box 580 • Fort Collins, Colorado 80522 • (303) 221-6750 LandmarN ENGINEERING LTD. March 30, 1987 Project No. 3721-CD7A-01-568 Mr, Mike Herzig Assistant City Engineer City of Ft. Collins P.O. Box 580 Ft. Collins, CO 80522 RE: Sunstone Village P.U.D. Subdrains Dear Mike: In explanation for the proposed placement of perforated PVC pipe in the sewer bedding material, we wish to offer the following rationale: 1) In the Westerly portion of the total area the ground water is presently too high to permit basement construction, approximately 61. 2) The primary source of the groundwater table is deemed to be irrigation on and above the site. 3) The nature of the soils is such that moisture migration rates are quite slow. 4) The projected build -out rate of the total P.U.D. is relatively rapid, as noted in the Phasing Plan. 5) Experience has shown that addition of a subdrain pipe will facilitate a more rapid lowering of the water table in the early stages of development. Ultimately, the gravel bedding itself will provide adequate control, provided that care is exercised to insure that it is continuous through the manhole areas, and that it can conveniently outlet downstream. Such an outlet is provided in this case by the connection to the bedding of the 30" diameter storm drain at the Northeast corner of the property. We anticipate that the proposed pipe will need no maintenance during those initial stages. Main Office 2300 West Eisenhower Blvd. Loveland, Colorado 80537 Branch Office Dale D- Olhaysen, P.E. & L.S. 2235 2nd Avenue Greeley, Colorado 80631 ENGINEERS/ARCHITECTS/PLANNERS/SURVEYORS W Loveland (303) 667-6286 0 Greeley (303) 356-6286 0 Fort Collins (303) 221-5550 0 Denver (303) 629-7124 �4d TWA City of Ft. Collins Project No. 3721-CD7A-01-568 March 30, 1987 Page 2 We trust this rationale will be of assistance to you in completing your approval of this project. If you have any questions, please call. Very truly yours, LA K ENGIN Tp .tit r David Sh pe"Q. a�61 RFa �4 Colo. P E. 595914 a . DBS/erl aw, tirr CITY OF FORT COLLINS / STORM WATER UTILITY June 30, 1987 Advanced Drainage Systems, Inc. 719 E. Vine Street Fort Collins, CO 80522 2 A / T ttentton: Dan Fits RE: Use of N-12 n Sunstone Development �� Dear Dan, I have reviewed the information submitted concerning your new ADS N-12 pipe as well as contacting two of the engineers who have installed it on their projects. Since it is a new product that has not been tested for any appreciable length of time we would like to use this product on a trial basis only. Therefore, I hereby accept the use of this product on the Sunstone drainageway as a test section for the City of Fort Collins. In addition it is required that the most conservative bedding detail be used; that being compacted granular material from six inches below pipe to 12 inches above the crown of the pipe with the lower six inches being 3/4 inch and smaller material and the rest being 3/8 inch and smaller. For accepted gradation, trenching, etc. please refer to our Storm Drainage Construction Standards or if you have questions contact the Utility Inspection Department. Also since this will be the first use of this product in Fort Collins I would request your engineers inspect the installation procedures as well as the bedding material. The City's limited experience with polyethylene pipe has taught us the installation and bedding are crucial to a good performance of the product. Depending on the test section results, future installations could be installed using your recommendations for bedding thus reducing the cost so that we can realize the full financial benefits of the pipe. If you have any questions or need further assistance please do not hesitate to contact me. Sincerely, Glen D. Schlueter Civil Engineer STORM WATER UTILITY 300 LaPorte Ave. • P.O. Box 580 • Fort Collins, Colorado 80522 • (303) 221.6605 CITY OF FORT COLLINS STORM WATER UTILITY August 3, 1987 Advanced Drainage Systems, Inc. E. Vine Street For a._ Fort Collins, CO 80522 Attention: Jeff Smith RE: Use of N-12 on Sunstone Development Dear Jeff, I have considered your request to eliminate the 12 inches of bedding material above the crown of the pipe and agree that it is quite conservative to require it. Especially since ASTM standard D 2321-83 paragraph 9.1.1.1 requires it only to the top of the pipe and your own specifications require 12 inches of bedding above the pipe, when there is over 20 feet of cover. I have also discussed it with our inspectors who feel more comfortable with 12 inches of bedding above the pipe but could not justify requiring it. Therefore 3/8" and smaller bedding will be required only to the top of the pipe. (The six inches below the pipe is to be 3/4 inches and smaller). If you have any questions or need further assistance please do not hesitate to contact me. Sincerely, e&�� �Cflj' Glen D. Schlueter Civil Engineer cc: Dave Stringer Dennis Messner, Landmark Engineering, Ltd. 4- '01f STORM WATER UTILITY 300 LaPorte Ave. • P.0 Box 580 • Fort Collins. Colorado 80522 • (303) 221-6605 LU- ndmuh ENGINEERING LTD. April 18, 1988 Project No. 3721-CDIJ-01-568 Mr. Glen Schlueter Storm Drainage 300 LaPorte Ave. Fort Collins, CO 80521 RE: Sunstone Village - P.U.D., 1st & 2nd Subdivisions, Fort Collins, Colorado Dear Mr. Schlueter: This is to inform your office th4t all drainage improvements which have been completed on the subject subdivision have been constructed in accordance with the approved plans. The basic improvements which have been constructed include: grading and shaping of detention pond; construction of out - fall drain from detention pond and lowering of Fox Meadows storm drain; grading of channel along north boundary of site; installation 24" dia, storm drain along north bounda- ry; installation of culvert pipes crossing Caribou Drive; grading of Swale along south boundary of site; regrading of Harmony Village MHP Detention Pond; installation of outlet pipe from Harmony Village MHP Detention Pond to on -site detention pond; grading of overflow Swale along easterly boundary; installation of pipes and catch basins on -site; and installation of concrete pans for overlot drainage. We are requesting that you confirm that the construction which has been completed is acceptable. This is not a request for reimbursement for area wide drainage improve- ments. A separate request for reimbursement will be submit- ted shortly. If you would briefly describe the procedure to be followed in order to expedite the reimbursement request, it would be greatly appreciated. We sincerely appreciate your assistance on this matter. If you should have any questions, Please advise. Respe tfully requested, Lan mmrrk,Engineering Ltd. Den i"' s R M s ns—__ DRM/ej Main Office 2300 West Eisenhower Blvd. Dale D. Olhausen, P.E. & L.S. Loveland, Colorado 80537 President ENGINEERS / ARCHITECTS / PLANNERS / SURVEYORS .%�.- Loveland (303) 667-6286 . Greeley (303) 356-6286 . Fort Collins (303) 221-5550 . Denver (303) 629-7124 M CITY OF FORT COLLINS STORMWATER UTILITY April 28, 1988 Landmark Engineering Ltd. 2300 W. Eisenhower Blvd. Loveland, CO 80537 ATTN: Mr. Dennis Messner Mr. J. L. Walter Re: Sunstone Village - P.U.D., Fort Collins, Colorado Gentlemen: In response to your request, this is to confirm that I have received your letter of construction compliance (letter attached) and have reviewed it with our Construction Inspection Department. The construction plans referenced in this letter were approved by the Stormwater Utility on March 20, 1987 and May 5, 1987 for the first and second filings respectively. Our comments are as follows: 1. The letter of compliance needs to be signed by an engineer registered in the state of Colorado. 2. The catch basin box on the south side of Montezuma Drive near the east property line needs to have the weep holes drilled per my conversation with J. L. Walter, 3. The catch basin box on the west side of Caribou Road and south of the north property line presently is open on the west side. This allows silt to be washed into the system and eventually across the street into the detention pond. This silt must be cleaned out of the system and the opening plugged or install erosion control measures until such time that the box is connected into the rest of the system. 4. The detention pond survey verification indicates the toe of the slope along the east side of Caribou Drive is approximately where the low flow pan was to be constructed. Therefore the pond capacity is not as shown on the construction plans. In addition there are no elevation checks in the interior of the pond. The pond volume must be verified and since it has been reduced the effects must be analyzed or the pond regraded. Originally this pond was oversized but when the detention pond in Harmony Village Mobile Home Park was revised and the two ponds STORMWATER UTILITY