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Home My WebLink AboutNEW BELGIUM BREWERY - OVERALL DEVELOPMENT PLAN - 1-95C - SUBMITTAL DOCUMENTS - ROUND 2 - DRAINAGE REPORT5. REFERENCES 1. City of Fort Collins, "Storm Drainage Criteria Manual", (SDCM), dated March, 1986. 2. "Drainage and Erosion Control Report for New Belgium Brewery, Fort Collin, Colorado' by Water, Waste & Land, Inc. dated March 30, 1995. 3. The "Final Drainage and Erosion Control Report for New Belgium Brewery First Filing" by JR Engineering, Ltd., dated December 23, 1997. 4. "Final Drainage, Erosion and Storm Water Quality Study East Vine Streets Facility P.U.D., Phase One Final, City of Fort Collins,", RBD Inc, Engineering Consultants, dated June 28, 1993. 5 4. 3.5 Water Quality Methods to ensure stormwater quality for the permanent facilities is required to be addressed with further development of this site. Specific measures implemented to ensure stormwater quality for this site will be addressed with the Preliminary Development Plan (PDP). The preferred permanent water quality measure is extended detention which can be incorporated into proposed detention facilities. CONCLUSIONS 4.1 Compliance with Standards All computations in conjunction with preliminary and final development plans (PDP and FDP) completed for the ODP areas shall be in compliance with the City of Fort Collins Storm Drainage Design Criteria Manual and the Erosion Control Reference Manual for Construction Sites. 4.2 Drainage Concept The Overall Development Plan area shall be designed to meet the criteria set forth in the Manuals noted above. Both basins will require detention prior to release into existing conveyance systems. All runoff from the ODP area will eventually be conveyed in existing storm drainage systems to the Cache La Poudre River. 4 Based on an assumed C-value for Industrial (Table 3-2 City of Fort Collins Stormwater Manual) of 0.85 and the 2-year historic release rate, the additional required detention for this basin in the 100 year storm event is approximately 3.3 acre feet. 3.3 East Basin The East Basin contains approximately 30 acres and encompasses the eastern half of the ODP area including the east half of Lemay and the north half of Buckingham. The parcel is bounded on the south by Buckingham Street, on the east by Lemay Avenue, on the north by the City of Fort Collins Street Facilities and on the west by undeveloped property. This basin is entirely undeveloped and covered in grasses and trees. The basin slopes to the southeast at approximately 0.4% A detention area for this basin is proposed in the southeast corner of the site. This pond will release into a pipe at the intersection of Lemay and Buckingham. A 15" RCP currently exists at this location but City of Fort Collins Stormwater Department has indicated that this pipe and downstream facilities will require improvements prior to any development in this `East' basin. The improved pipe will convey the flows under Buckingham and into the existing improved ditch (or other facility to be determined) along the west side of Lemay Avenue.�This-ditch.-conveys•-the flows -south te-tke-Porrdre o`h '��L -Ri-ver- Since there is no existing Master Plan for this area that dictates a release rate, the release from the detention pond will be restricted to the 2-year historic rate. // C Ykt° �mat(vr %1 ✓er Ma h e the � �r ou1 �U� t s�� .� V e.�- a x. Dwt d ecd� sg S(19 Srac l jk._ j(1,( sy��tM aloAq G rc�n i5 a( �ad� 4h6(�o S Based on an assumed C-value for Industrial (Table 3-2 City of Fort Collins Stormwater Manual) of 0.85 and the 2-year historic release rate, the required detention in the 100 year storm event is approximately 6.7 acre feet. 3.4 Offsite Basin The Offsite Basin is located along the north property line and includes areas of the City of Fort Collins Streets Facility that are not detained on that site. The total area is approximately 2 acres and is comprised of mainly landscaped area. Runoff from this basin enters the East Basin. 3 I� 4 1. GENERAL LOCATION AND DESCRIPTION 1.1 Location and Description of Property The subject property is located in east of downtown Fort Collins on the north side of Buckingham Street, east of Linden Street and west of Lemay Avenue. The property contains a total of approximately 49 acres. The entire property is located in the Northeast Quarter of Section 12, Township 7 North, Range 69 West of the Sixth Principal Meridian, in the City of Fort Collins, Larimer County, Colorado. Forty-two acres of the property is currently undeveloped and the remaining 7 acres contains the existing New Belgium Brewery. The undeveloped area has a high point new the center of the property and the property slopes to the southwest at varying rates and to the southeast at approximately 0.4%. See the drainage plan in the back pocket for approximate contours indicating the slope of each basin. See Section 3 for specific information on each basin. There are no specific improvements planned for the undeveloped 42-acre parcel at this time. Specific uses for this area will be determined when final development plans are completed. 1.2 Purpose of Report The purpose of this report is to establish criteria that will be utilized when development rG of the property in the Overall Development Plan (ODP) area occurs. r 2. DRAINAGE BASINS AND SUB -BASINS A 2.1 Major Basin Descriptions The proposed ODP area lies within the Cache La Poudre River Drainage Basin. The ODP area has not been included in any master drainage plan to date. Drainage reports have been completed for the developed New Belgium Brewery area including the "Drainage and Erosion Control Report for New Belgium Brewery, Fort Collin, Colorado" by Water, Waste & Land, Inc. dated March 30, 1995 and the "Final Drainage and Erosion Control Report for New Belgium Brewery First Filing" by JR Engineering, Ltd., dated December 23, 1997. l I TABLE OF CONTENTS TABLEOF CONTENTS............................................................................................................... iii l . GENERAL LOCATION AND DESCRIPTION 1.1 Location and Description of Property......................................................................1 1.2 Purpose of Report ....................................................................................................1 2. DRAINAGE BASINS AND SUB -BASINS 2.1 Major Basin Description..........................................................................................1 2.2 Sub -Basin Description.............................................................................................2 3. DRAINAGE DESIGN CRITERIA 3.1 General Concept......................................................................................................2 3.2 West Basin...............................................................................................................2 3.3 East Basin................................................................................................................3 3.4 Offsite Basin............................................................................................................3 3.5 Water Quality ...........................................................................................................4 4. CONCLUSIONS 4.1 Compliance with Standards....................................................................................4 4.2 Drainage Concept....................................................................................................4 5. REFERENCES....................................................................................................................5 II II II I I iii North Star �Alftm.., design _ February 20, 2001 Basil Hamdan City of Fort Collins Stormwater 700 Wood Street Fort Collins, CO 80522-0580 RE: Overall Drainage Concept for the Overall Development Plan for New Belgium Brewery Dear Basil, I am pleased to submit for your review and approval, this Overall Drainage Concept for the Overall Development Plan for New Belgium Brewery. I appreciate your time and consideration in reviewing this submittal. Please call if you have any questions. Sin Patricia Kroetch, P.E. M Is 1 194 W. Ash Street, Suite 8 Windsor, Colorado 80550 970-686-6939 Phone • S70-686-1188 Fax OVERALL DRAINAGE CONCEPT FOR THE OVERALL DEVELOPMENT PLAN FOR NEW BELGIUM BREWERY Prepared for: The Neenan Company 2290 E. Prospect Road Fort Collins, CO 80522 Prepared by: North Star Design, Inc. 1194 W. Ash Street, Suite B Windsor, Colorado 80550 (970)686-6939 February 20, 2001 Job Number 110-06 I 2.2 Sub -basin Description The ODP area has been divided into two basins and shown on the Conceptual Drainage Plan as the West Basin and East Basin. The West Basin includes the area that is currently developed and contains the existing New Belgium Brewery as well as a portion of the undeveloped area. The East Basin includes the remaining ODP area and is entirely ills undeveloped. 3. DRAINAGE DESIGN CRITERIA 3.1 General Concept In general, the drainage design of the two areas in this ODP will be required to conform to the previously completed drainage studies and plans that govern the drainage design of the existing New Belgium Brewery. The drainage design of the ODP area will be required to accommodate the Rainfall Intensity -Duration -Frequency curve data adopted by the City of Fort Collins on March 26, 1999. The basins in the ODP area will also be required to provide water quality enhancement in conjunction with the drainage design of each basin. 3.2 West Basin The West Basin contains approximately 22 acres and contains the western half of the ODP area including the north half of Buckingham. The parcel is bounded on the south by Buckingham Street, on the west by Linden Street, on the north by the City of Fort Collins Street Facilities and on the east by undeveloped property. The east portion of the basin is currently undeveloped and covered in grasses and trees. This portion of the basin is characterized by two large piles of lime dumped on this site which cause indirect drainage patterns in this area. The west portion of the basin is currently developed and slopes to an existing detention area along Buckingham Street. The existing detention area will be enlarged and reconfigured to serve the entire West Basin. Since there is no existing Master Plan for this area that dictates a release rate, the release from the detention pond will be restricted to the 2-year historic rate. The flows from this pond will be conveyed in the existing drainage system to the south and into the Poudre River. 2 I