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Home My WebLink AboutDrainage Reports - 01/18/2024Kimley>>> Horn September 13, 2023 Dan Mogen Development Review Engineer 281 North College Avenue PO Box 580 Fort Collins, CO 80522 RE: Krispy Kreme — 4624 Mason Street Drainage Narrative Dear: Mr. Mogen We are providing a detailed memorandum showing the increase in impervious area and drainage design for the proposed site and comparing it to the existing site conditions. This drainage narrative provides a summary of the existing and proposed drainage conditions associated with the proposed Krispy Kreme building at 4624 Mason Street located on a.781-acre parcel. The existing site is stabilized by the existing building, parking lot, drive-thru aisles, and landscape area. The project area is anticipated to disturb ±0.36 acres. This disturbed area is also detailed on the submitted Minor Amendment plans and included in the attached Exhibit A— Proposed Drainage Map of this letter. Table 1 below is a summary of the anticipated areas and Table 2 below is a summary of the Impervious areas: Impervious Area Information — 4624 Mason Street Site Basin Area Existing Drainage Basin Pavement & Roof Area (Impervious Area) 30,500 Square Feet (0.70 Acres) Proposed Drainage Basin Pavement & Roof Area (Impervious Area) 31,447 Square Feet (0.72 Acres) Change in Impervious Area 947 Square Feet (0.02 Acres) Table 1: Impervious Area Information (See Exhibit C for full calculations) Statistical Site Information — 4624 Mason Street Gross Project Area: 34,020 Square Feet (0.78 Acres) Proposed Building Area: 3,592 Square Feet (0.08 Acres) Total Disturbed Area: 15,777 Square Feet (0.36 Acres) Table 2: Statistical Site Information kimley-horn.co Kimley>>> Horn Page 2 The increase impervious area for the entire site is 947 Square Feet (SF). This increase in impervious area is due to the addition of the existing building expansion (185 SF) and updates for truck unloading area which removes an existing landscape area. In the existing condition, 8.77 cubic feet per second (CFS) flows downstream from the project area in the 100-year storm event. Runoff flow is increased by 0.14 CFS in the proposed condition for the 100-year storm event to 8.91 CFS. The project site was previously studied by Adam-Avery, LTD. with a written Final Drainage Report approved 12/07/1995 (See Exhibit D). The project is intended to upgrade the building and site to fit the needs of the proposed tenant. Basin A historically includes the building, drive thru land and all parking on the north side of the site. Runoff historically flows overland towards a 8'x6' box inlet with a slotted manhole located in the northeast portion of the site. The existing inlet connects to existing public infrastructure. Proposed flows follow historic flows by conveyance through existing curb/gutter and a proposed 2' wide pan to existing 8'x6' box inlet with a slotted manhole. The additional 0.14 CFS is proposed to go to this inlet in the 100- year storm. The existing slotted manhole can hold capacity for the minor storm. For the major storm the spillway is East of the inlet onto College Ave. Basin B historically includes south side of the parking area. The study encompasses the full property limits. Historically, this basin drains towards an existing sump inlet located on the parking bay south of the site. Limited disturbance is anticipated in this basin, proposed changes include removing and adding landscape islands, stump removal, and proposed tree additions. Equivalent runoff coefficients for existing and proposed conditions are calculated in Exhibit C. Ultimately the flows end up within an existing 18-inch RCP storm sewer pipe that conveys runoff to the Mail Creek 8'X8' box culvert historically. In conclusion, the added runoff from the added building square footage and impervious area is not anticipated to negatively impact the existing site or sites upstream and downstream of the site. Please contact us with any questions or concerns. Thank You, KIMLEY-HORN AND ASSOCIATES, INC. ��' ;� ��,�� Emily Felton, P.E. Appendices A — Existing Drainage Map B — Proposed Drainage Map C — Rational Method Calculations D — Existing Master Report Q`�P�� RE��S,�.F �, .•'� pRC ��• �' .� E f •. v�: �� e F��:� :w PE.0054609 z: �, � �09/13/2023' c� � o�FSS��NAL •��\� kimley-horn.co Kimley>>> Horn Page 3 EXHIBIT A— Existing Drainage Map � � x w � 0 NI 0 0 � � � % � � a� a� � � � � � / 0 0 Q c� i � � 0 U O L� � � NI O O � � � i .-� � I 0 � � � — — _ — — � `� , ,. TRACT A SOUNDTRACK AT EXISTING 42" RCP STORM I ARBOR PLAZA P.U.D. �SEWER PIPE TO REMAIN I ` r - - � �=< � �� , � � EXISTING PROPERTY LINE � �, � � I �� ' �� _a � �a � � , � �.._....�� -+��i �� -� 1-1 i�-�-I� . � " � � ` ` � ' ' � _:-� ��'_ _ _ � _ I , , � �,; i , 15�� R , �"��'t�-' ' � ` � , ` _ CUILVE T ST RM SEWER ,;, _ � �. EXISTING CP ' F j ; - � , ` � ! TO REMAIN ,� � � STORM SEWER PIPE � � ' i �. �*' � TO REMAIN w z cv � � �. ,:�� 00 . Qv �WO �� _� I N:. y,, i Z Z N Q W N- I: /; -� LOT 1 �; �� : _ ' �Wo __ _ —' QQo , ; ,� , 1 �� ' ARBOR PLAZA � - o� N — ' � w o�, i -, A , o -- p o / SOUNDTRACK CAR AUDIO _— - z~ o c� o ___ -� � � � - N � � Z aN � / _r _� X W N � ° (F/1 U' z _ _-- � - - _ i- � ,� � _ � wQ W�V--- � /�� 1 � � � oW � EXISTING 6'X8' BOX / co � ' EXIST1NG 8'X6' BOX DRI _ ---- - .N z l.J � \ �— �� INLET WITH 4� SLOTTED CULVERT STORM SEWER �� Q � � MANHOLE TO REMAIN AI TO REMAIN `::: ' __- -- PROTECTED IN PLACE 1 � � - _ _ / �� ' ; � ,----� � ♦ ' � j �. \ / ; / _-. . . � ..�.. . J . �� ` ._-- . ,� � 02S � . � r � � . . � � �, .�,� � ,` � �.� . . . . �, ... ' .. �' - - - � � . �� . ,. �W \ �j I � f � � 5Q � � G JP�'G?� �� ' 1 ` � � `;� . ' W �`�' 26 � ti,�`i� . � . . . � ,� �.'�`? P�� p� , �: f � � ` �� ,F' j '. .` EX A , � � � /,-� , / i. ��. \ .' 0.67 0.93 �`�. I - �� 11 �� .�t :� :- ,� �� . "�." / � /: . . �/ -%� / � � � , , , � �t. i� / / �� '6 ',�` , , / I ;, � -i` � � � � � ' ' • EXISTING BUILDING - � - �• � � ,' : � 2��' • V �0 REMAIN 3,500 SF .Y. - � . I , � � ��. / � r .; � . . . .. � � . . � , . . .' -. �: _ � � �� W �� W�� / \ ♦ ' ' /�. ��' . . . `� . �'. � %�// �,' , , % � � , , ; �, `.�`W � /// , ��. , / ; �� / � � . . .�.` .� .�.�.,.�.� ii� "_ ; i � . .W.�W .�.��.��•.` , �. W �. . � ....... ;� �. li . ,,� � � �� - .. ....... ��;, :�W�� G'� s• � � ___ ,W.�,�,y.�,- ,. ; : -� � , � � � � / ---j � �- f f � � / ; � 4�1.29� . � .. . , �, � � t(`�2 0 �'L� ' � \\ / � ; , _ _ - - _ ,► ` t O �9� ,� � ' �% ' — _ / � ,: �`� / r p'Ly G� � - / r �� ■ � � -_—_ � i� �� ,�_ � � � _ � ��. � - —= � � �� t�`�'n � ��■' �� ';� � � _ � , �� O � � '�J�'� - . O'p9�'�C�C�� / . . � � � O� ��2�� \ � �:� I + - W '"" _ - , . _ �, � � . � � -� _ � , _ � � �� r . � �,.� . ,. �,� .. . O� W wN ��/ ' � .. � _ c�i cn o �� 26 `1 � �: cS ¢ ¢ c� �5� ♦ ' \ , �p�� wo �� . % �: �:� ��:�:� � �: � �.. o m c`''a � �, � � r: �, I\ �, � �Z 25y�- >: c��o �� =�� --�5�. EX B .... _ , .. � I , � ��Z _ 0.26 1.03 �`•r- �� ` / , ` X � w � �., ` � 1 4 � � ;: w� -. . .'�`. J � wt� : � �� .. �, . . . , � �� . _ , � _ � � , - . ; �� , , __ � _ ♦ ♦ .�� _ .�_ .� B .,,.� LOT 1 ETH AN ALLEN AT � ARBOR PLAZA P.U.D. ; �� . �,�o �h P � �� V , °,I � P , � �EXISTING 24" RCP TO REMAIN � I � 1 Q� � 15' EXISTING STORM I I DRAINAGE EASEMENT w � REC. N0. 20140002002 w O I~�' J �' , � ; t _ � � _\ - � �EXISTING 18�� RCP STORM SEWER PIPE TO REMAW -�_ °_ - <<_- __- EXISIING CURB INLET TO REMAIN � � I o� 0 Ui � � ,� !,; ��, i � I�� i. ��. I N III !'' ' - EXISIING CURB INLET , TO REMAW �� .� i , 1 � � ��, - EXISTING 18" RCP STORM ; SEWER PIPE TO REMAIN EXISTING CURB INLET '�` �' TO REMAIN � T; � �; I ��l �i '�g �. �� '' � Y;, � I LEGEND: � � � � PROPERTY LINE — - EXISTING EASEMENT LINE XXX�" >' "" `- ��„�, EXISTING GRADE CONTOUR EXISTING GRADE FLOW ARROW EXISTING LANDSCAPE AREA EXISTING CONCRETE A A = BASIN DESIGNATION B = AREA IN ACRES B � C= 100-YEAR RUNOFF COEFFICIENT A DESIGN POINT DESIGNATION EXISTING STORM SEWER � _ � � � � DRAINAGE BASIN BOUNDARY GRAPHIC SCALE W FEET 0 10 20 40 � Know what's b@�OW. � CaII before you dig. � � � O O o � N � � z °p N N W � � � � Q o � � UO� � O � � � N N � � Q� o o�� z�0 � �¢� o�o � =zo I O U �� J Q � ��z Y � J ■ � N Q O O � F- C�1 O � o�o DESIGNED BY: HPC DRAWN BY: AIA CHECKED BY: EPF DATE: 9/13/2023 O ~ � wQw� �p�w wJUQ LI� O O z � U p _ Uj Z Q �z00 �' J U � O � � � U � z � � � C� � zX � � W U �PpO REG�s� �,� . '� ARC �' F� � � �QE F F•. v :�,� li a � •� • �•�9 1 202�'� � •. .• �� o�Fss��NAL •F��\� PROJECT N0. 1 961 31 002 SHEET C7.0 Kimley>>> Horn EXHIBIT B— Proposed Drainage Map Page 4 kimley-horn.co 3 � � � � 0 NI 0 0 � � � � � � � � � � � � � 0 0 Q � � � � 0 U O L� � � NI O O � � � i .—� � I 0 � z i � LOT 1 ARBOR PLAZA SOUNDTRACK CAR AUDIO � � -_�', _ __ �' 19.8' EMERGENCY ACCESS __ EASEMENT ' � REC. N0. 20230039445 / I -- - , ` - \ dl; �dl � r J � ,� �,� �'� EXISTING 15" RCP � STORM SEWER PIPE TO REMAIN _— — � ?2� � � I EXISTING 42" RCP STORM I � SEWER PIPE TO REMAIN I _ � PROPERTY LINE �� i EXISTING PROPERTY LINE TO BE VACATED I � � PROPERTY LINE I F � o—� o�Wa'o N ��ro � z�z�- 1 ' ROW CONVEYED TO THE CITY OF • _ __ � FORT COLLINS --- -- • REC. NO 20230039446 , � . ,� '� • I', �I I _ � �� I � - _ � — -, I h � � A �` t �' -� � EXISIING 8�X8� BOX �� - V _ _ — � CULVERT STORM SEWER _ I�— TO REMAIN - �. � � , , � � \ EXISIING 8 X6 BOX DRAIN � EXISTING 6'X8' BOX � _�_ ; `O ' �-�°� � — N . ' ', , INLET WITH 4' SLOTTED � �� , CULVERT STORM SEWER � -- ��I�I � MANHOLE TO REMAIN AND I TO REMAIN � � � �I �'- _- -- , `�N \ . PROTECTED IN PLACE '� � � � �� ii � _- � � � r ` ROAD CENTER LINE -__ - - .�_+l _ � .- : N ` _ ' - .o . a d •�� - I � � . .. . ; T_ . _ � �� .�� . �<.�`� � � -- :- � � .a— • ., � . . �� - -- _ ,, � . a V . . . � / � . _ . . . . . � . �: --- -, I r �. _ _.- - ' - . • a •. . . . � 'V � _. . . a . . . . ' . . . J �v O' QG �, ' , ,,. i . __ - _, EXISTING ASPHALT � . a•. 6• ' _. � 5026 �•�•.•�•�• a (��P�t�,G.��L . � / • � _ � � , . ' i ,`'J�O L O� \ v. . II O. d ��- � Q, t� � . . ,"�� d � d, A � O � . , , . • : e .' 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W � N �� . � U � �' � ,/ , . _, _"�,ae, A�u� ' • d� . ��6 a � . � �G ��` �y�♦ '�' c� w o � �� , Q � oo ; ��: . �. �. ��,�c.�p,5 p�l. c� cn o // � �, r 0 �� :'� � � � � �. � � �� f QQN �� i' U WN�-�� a'�� /� � a o �, � > �� p.�� i � � � ��s � � � �'�� -„ "��►� "�� ' � � �� , / �o m i� �� , �¢� ',r�` �wo � � / � ��.— - � , o �,a�� w 5 - �i ; . � 15' EXISTING STORM �� Q � � DRAINAGE EASEMENT REC. W� O N0. 20140002002 C� � � _: �� % �� , ,\ J � � b � I V O � � � � j � U � � � I � � �%�'�`0 (� � % �' � ` , ! a �-.,f � �i i �� I , , / �� I� � \_-� �� ,f , � -� i ; I` � ' � ; % � __l �-,� �� I, ��, , �0 �� = � , � , , � z N ,:� 6'�'�� ,,' , - ' - - _ �� c� � • � � � P R B �_ - .� � � w � � , � �= - �� - �, � � r i � � ` ,:� ,� • zpp . .�. .� W � ( � O � 1 ' ' - � %� `.`.•W' v~i �3 Z 0.26 1.00 ..�.�.�.'. cv � ' ` � � _ . � � _ ., _ � � _ �. W . . ��; _- _- — � ' O �' � � - �`� x r w . . . . . . , ,� \ , — � -� .� �1% � � r, � � •''"'•'• w H � :' . . '. ,, - � J . � � F ' .' �' �' �'.'.' �' �'. j EXISTING 18�� RCP STORM � � ' ' ' ' ' ' SEWER PIPE TO REMAIN � � _.�. � � ��.�.�. .�.�. � � - � � � �--�� . . ` . .' � j, � � �� •s- �-►' � � .■■■! � . � : _ � � — : , , `r_ ! ' . TRACT A SOUNDTRACK AT ARBOR PLAZA P.U.D. . _ - _ = � -- I � -. -� �� EXISIING CURB INLET TO REMAIN I I M I R I II � � EXISIING CURB INLET TO REMAIN r i i �� ' �� `, - EXISTING 18" RCP STORM SEWER PIPE TO REMAIN ,� EXISTING CURB INLET �� I TO REMAIN � I � d � � I `. � ,� , , , � ';; V I� LEGEND: � � � � PROPERTY LINE — - EXISTING EASEMENT LINE >'X�'>. EXISTING GRADE CONTOUR XXXX PROPOSED GRADE CONTOUR X.xx� PROPOSED GRADE FLOW ARROW EXISTING LANDSCAPE AREA .� .� W W W W �' �' PROPOSED LANDSCAPE AREA W W W W W W W W EXISTING CONCRETE 4 ' : e . . • ' , '• .. , . • ' � . � :. � d. �� ., � � �a. � :� PROPOSED CONCRETE a. • • . . PROPOSED MILL AND OVERLAY OF EXISTING ASPHALT . .. � � � .... . . PROPOSED ASPHALT A A = BASIN DESIGNATION B = AREA IN ACRES B � C= 100—YEAR RUNOFF COEFFICIENT A DESIGN POINT DESIGNATION EXISTING STORM SEWER PROPOSED STORM SEWER � � � � � � DRAINAGE BASIN BOUNDARY � � � �� < <� � � � LIMITS OF DISTURBANCE GRAPHIC SCALE W FEET 0 10 20 40 � Know what's b@�OW. � CaII before you dig. � � � 0 O o r� N U I z °p N N w � � � � Q o � � UO� � O � � � N N � � Q� o o�� z�0 � � ¢ � O � O — =ZO I O U � {--. J Q � ��z Y � J ■ � N Q O O � F- C�1 O � O � � DESIGNED BY: HPC DRAWN BY: AIA CHECKED BY: EPF DATE: 9/13/2023 � O � Q W Q W � W �o�� wooz � U p Q ��Z� �ZOp �JUp (� O � w � ��0 ��Z� O � � U � �PpO REG�s� �,� . '� ARC �' F� � � �QE F F•. v :�,� li a � •� • �•�9 1 202�'� � •. .• �� o�Fss��NAL •F��\� PROJECT N0. 1 961 31 002 SHEET C7.1 Kimley>>> Horn Page 5 EXHIBIT C— Rational Method Calculations 196131002 Krispy Kreme 9/19/2022 Fort Collins, CO Prepared By: HPC Checked By: EPF Rainfall Intensity Time Intensity Frequency Tabulation TIME 2 YR 10 YR 100 YR 5 2.85 4.87 9.95 6 2.67 4.56 9.31 7 2.52 4.31 8.80 8 2.40 4.10 8.38 9 2.30 3.93 8.03 10 2.21 3.78 7.72 11 2.13 3.63 7.42 12 2.05 3.50 7.16 13 1.98 3.39 6.92 14 1.92 3.29 6.71 15 1.87 3.19 6.52 20 1.61 2.74 5.60 25 1.43 2.44 4.98 30 1.30 2.21 4.52 40 1.07 1.83 3.74 50 0.92 1.58 3.23 60 0.82 1.40 2.86 120 0.49 0.86 1.84 Note: Intensity values from the City of Fort Collins Intensity-Duration-Frequency Tables; Chapter 5, Section 3.4 of the Fort Collins Stormwater Criteria Manual, 2018 Edition. Runoff Coefficients Table 3.2-2. Surface Type - Runoff Coefficients Surface T Hardscape or Hard Surface Asohalt. Concrete Gravel Pavers xape or Pervious Surface Lawns, Sandy Sofl, Flat Slope < 2% lawns, Sandy Soil, Avg Slope 2-7'Y Lawns, Sandy Soil, Steep Slope >7% Lawns, Clayey Soil, Flat Slope < 2% Lawns, Clayey Soil, Avg Slope 2-79�, Lawns, Clavev Soil, Steep Slope >7% Runoff Cce�cients 0.95 0.95 0.80 0.50 0.50 0.10 0.15 0.2Q 0.20 0.25 0.35 c•c. ��._�, o� : � :_�iNNOT EXCEEU iHE �ut oF � Note: Runoff Coefficient values are from the City of Fort Collins Runoff Coefficient Tables 3.2-2 and 3.2- 3; Chapter 5, Section 3.2 of the Fort Collins Stormwater Criteria Manual, 2018 Edition. Table 3.23. Frequency Adjustment Factors Storm Return Period Frequency Adjustment (years) Facto� (G) 2, S, 10 1.00 2 5 1.10 SO 1.20 100 1.25 K:\NCO_Civil\196131002_KK Fort Collins�Project Files\Eng\Drainage\Calc\Imperviousness and C Values.xls 196131002 Krispy Kreme 9/19/2022 Fort Collins CO Prepared By: HPC � Checked By: EPF Existing Imperviousness and Runoff Coefficient Calculations Basin A- EX Area (sf) Basin % I CZ C,o �,00 Lawns 7,748 27% 2% 020 020 025 Rooftop 3,592 12°/ 90% 0.95 0.95 1.00 Asphalt, Concrete 17,557 61°/ 100% 0.95 0.95 1.00 28,897 100 % 72 % 0.75 0.75 0.94 Basin B- EX Area (sf) Basin % I CZ Cio �ioo Lawns 2,000 18% 2% 020 020 025 Rooftop 0 0% 90% 0.95 0.95 1.00 Asphalt, Concrete 9,351 82% 100% 0.95 0.95 1.00 11,351 100 % 83 % 0.82 0.82 1.00 Proposed Imperviousness and Runoff Coefficient Calculations Basin A- PR Area (sf) Basin % I CZ C�o C�oo Lawns 7,105 25% 2% 0.20 0.20 0.25 Rooftop 3,571 12 % 90 % 0.95 0.95 1.00 Asphalt, Concrete 18,221 63 % 100 % 0.95 0.95 1.00 28,897 100% 75% 0.77 0.77 0.96 Basin B- PR Area (sf) Basin % I Cz C�o Cioo Lawns 1,696 15% 2°/ 0.20 0.20 0.25 Rooftop 0 0% 90 % 0.95 0.95 1.00 Asphalt, Concrete 9,655 85 % 100 % 0.95 0.95 1.00 11,351 100% 85% 0.84 0.84 1.00 Notes: 1. Imperviousness, I, values per UDFCD Criteria Manual Volume 1, Table 6-3 2. Runoff Coefficient values are from the City of FoR Collins Runoff Coefficient Tables 3.2-2 and 3.2-3; Chapter 5, Section 3.2 of the Fort Collins Stormwater Criteria Manual, 2018 Edition. Frequency adjustment factors were used for the 100-year runoff coefficient utilizing Table 3.23. 3. Soil is Altvan-Satanta loams with mostly Clay Loam soils of the Hydrologic Soil Group B per Web Soil Survey. K:\NCO_Civil\196731002_KK Fort COIlinS�Project Files\Eng\Drainage\Calt\Imperviousne55 and C ValUe5.xl5 196131002 Krispy Kreme Fort Collins, CO 'ro osed Time of Concentration 2-Year Desi n Storms SUB-BASIN DATA RUNOFF INITIAL / OVERLAND TIME TRAVEL TIME COEFFICIENT Ti TT AREA AREA I LENGTH Slope LENGTH Slope Veloc DESIGN POINT DRAIN BASW (SF) (AC) (%) CZ�10 (FT) (%) T� (FT) (%) R (FP: Basin A- EX Basin A- EX 28,897 0.66 72% 0.75 160 2.5% 6.1 120 1.3% 0.195 4.4 Basin B- EX Basin B- EX 11,351 0.26 83% 0.82 100 2.4% 3.9 55 5.2% 0.195 8.8 Basin A- PR Basin A- PR 28,897 0.66 75% 0.77 160 2.3% 6.0 120 12% 0.195 4.2 Basin B- PR Basin B- PR 11,351 0.26 85% 0.84 100 2.4% 3.7 55 5.2% 0.195 8.8 9119/2022 Prepared By: HPC Checked By: EPF URBANIZED BASIN CHECK T� DESIGN TT T� LENGTH L/180+10 T� (2-YR) (FT) 0.5 6.6 280 11.6 6.6 0.1 5.0 155 10.9 5.0 0.5 6.5 280 11.6 6.5 0.1 5.0 155 10.9 5.0 196131002 Krispy Kreme si�sizozz Fort Collins, CO Prepared By: HPC Checked By: EPF Pro osed Time of Concentration 100-Year Desi n Storms SUB-BASIN DATA RUNOFF INITIAL / OVERL COEFFICIENT Ti DESIGN POINT DRAIN BASIN AREA AREA I � oa LENGTH Slope (SF) (AC) (%) (FT) ( /o) Basin A- EX Basin A- EX 28,897 0.66 72% 0.94 160 2.5% Basin B- EX Basin B- EX 11,351 0.26 83% 1.00 100 2.4% Basin A- PR Basin A- PR 28,897 0.66 75% 0.96 160 2.3% Basin B- PR Basin B- PR 11,351 0.26 85% 1.00 100 2.4% LENGTH Slope T� (FT) (%) 2.9 120 1.3% 1.4 55 5.2% 2.6 120 1.5% 1.4 55 5.2% TT R 0.195 0.195 0.195 0.195 Velocity (FPS) 4.4 8.8 4.7 8.8 TT 0.5 0.1 0.4 0.1 ..._.....___Tc._... _..__.. DESIGN T� (100- T� LE(FGj H L/180+10 YR) 5.0 280 11.6 5.0 5.0 155 10.9 5.0 5.0 280 11.6 5.0 5.0 155 10.9 5.0 196131002 Krispy Kreme 9/19/2022 Prepared By: HPC Fort Collins, C� Checked By: EPF Existing Runoff Calculations 2-Year Design Storm Runoff Calculations (Rational Method Procedure) BASIN INFORMATON DESIGN DRAIN AREA POINT BASIN (AC) Basin A- EX Basin A- EX 0.66 Basin B- EX Basin B- EX 0.26 TOTAL 0.92 Proposed Runoff Calculations 2-Year Design Storm Runoff Calculations (Rational Method Procedure) BASIN INFORMATON DESIGN DRAIN AREA POINT BASIN (AC) Basin A- PR Basin A- PR 0.66 Basin B- PR Basin B- PR 0.26 TOTAL 0.92 C2 0.75 0.82 C2 DIRECT RUNOFF � I T� C*A (IN/HR) 6.6 0.50 2.59 5.0 0.21 2.85 DIRECT RUNOFF � I T� C*A (IN/HR) 0.77 6.5 0.51 2.60 0.84 5.0 0.22 2.85 Q2 (CFS) 1.29 0.61 1.9 Q2 (CFS) 1.32 0.62 1.94 K:\NCO_Civil\196131002_KK Fort Collins�Project Files\Eng\Drainage\Calc\Imperviousness and C Values.xls 196131002 Krispy Kreme 9/19/2022 Prepared By: HPC Fort Collins, C� Checked By: EPF Existing Runoff Calculations 100-Year Design Storm Runoff Calculations (Rational Method Procedure) BASIN INFORMATON DESIGN DRAIN AREA POINT BASIN (AC) C�oo Basin A- EX Basin A- EX 0.66 0.94 Basin B- EX Basin B- EX 0.26 1.00 TOTAL 0.92 0.95 Proposed Runoff Calculations 100-Year Design Storm Runoff Calculations (Rational Method Procedure) BASIN INFORMATON DESIGN DRAIN AREA POINT BASIN (AC) C�oo Basin A- PR Basin A- PR 0.66 0.96 Basin B- PR Basin B- PR 0.26 1.00 TOTAL 0.92 0.97 DIRECT RUNOFF � I T� C*A (IN/HR) 5.0 0.62 9.95 5.0 0.26 9.95 DIRECT RUNOFF � I T� C*A (IN/HR) 5.0 0.63 9.95 5.0 0.26 9.95 Q�oo (CFS) 6.18 2.59 8.77 Q�oo (CFS) 6.32 2.59 8.91 K:\NCO_Civil\196131002_KK Fort Collins�Project Files\Eng\Drainage\Calc\Imperviousness and C Values.xls 196131002 Krispy Kreme Fort Collins, CO Existing Imperviousness and Runoff Coefficient Summary DESIGN DRAIN AREA % of Site I WEIGHTED Impervious POINT BASIN (AC) (%) (%) (%) Area (Ac) Basin A- EX Basin A- EX 0.66 72% 72% 52.0% 0.48 Basin B- EX Basin B- EX 0.26 28% 83% 23.3% 0.22 TOTAL 0.92 75.4% 0.70 Proposed Imperviousness and Runoff Coefficient Summary DESIGN DRAIN AREA % of Site I WEIGHTED Impervious POINT BASIN (AC) (%) (%) (%) Area (Ac) Basin A- PR Basin A- PR 0.66 72% 75% 53.6% 0.50 Basin B- PR Basin B- PR 0.26 28% 85% 24.1 % 0.22 TOTAL 0.92 77.7% 0.72 9/19/2022 Prepared By: HPC Checked By: EPF CZ 0.75 0.82 C�oo 0.94 1.00 C2 0.77 0.84 C�oo 0.96 1.00 K:\NCO_Civil\196131002_KK Fort Collins�Project Files\Eng\Drainage\Calc\Imperviousness and C Values.xls 196131002 Krispy Kreme 9/19/2022 Prepared By: HPC Fort Collins, C� Checked By: EPF Existing Direct Runoff Summary Standard Rational Method DESIGN POINT Basin A - EX Basin B - EX DRAIN BAS I N Basin A - EX Basin B - EX AREA (AC) 0.66 0.26 Q2 Q�oo (CFS) (CFS) 1.29 6.18 0.61 2.59 1.90 8.77 Proposed Direct Runoff Summary DESIGN POINT Basin A - PR Basin B - PR DRAIN BAS I N Basin A - PR Basin B - PR �� Standard Rational Method AREA Q2 Q�oo (AC) (CFS) (CFS) 0.66 1.32 6.32 0.26 0.62 2.59 1.94 8.91 K:\NCO_Civil\196131002_KK Fort Collins�Project Files\Eng\Drainage\Calc\Imperviousness and C Values.xls Kimley>>> Horn Page 6 EXHIBIT D— Existing Master Report � r � �� ` � �� . - - � ❑ ' � ■ � I his unofficial copy was downloaded on Jan-04-2022 from the City of Fort Collins Public Records Website: http://citydocs.fcgov.coin or additional information or an officia] co}�y, please contact C�ity of Fort Collins Utilities 700 Wood Street Fort Collins, CO 80524 USA � � •, � \ � s �� v j�jiF�1�� ,TF1'IifTR�; - . . FAZOLI'S RESTAURANT Arbor Plaza Shopping Center Fort Collins, Colorado Prepared for: INTERPLAN PRACTICE LTD. 933 Lee Road, Suite 120 Orlando, Florida 32810 Telephone: (407) 645-5008 November 6, 1995 Prepared by: ADAMS-AVERY, LTD. 1380 Lawrence Street - Suite 870 Denver, Colorado 80204 Telephone: (303) $20-4454 his unofFcial copy was downloaded on Jan-04-2022 from tl�e City of Fort Collins Public Records Website: http://citydocs.fcgov.com �r additional information or an ofticia] copy, please contact Ciry of Fort Gollins Utilities 700 Wood Street Fort Collins, CO 80524 USA [� 1 � � FINAL DRAINAGE STUDY FOR FAZOLI'S AT ARBOR PLAZA P.U.D. General Location and Description The Fazoli's praject is located in the northeast quarter of section 2, township 6 north, range �69 west of the 6th principal meridian, City of Fort Collins, County of Larimer, State of � Colorado. The site is bounded by South Col{ege Avenue on the east, Ethan Allen on the south, undeveloped land of Arbor Plaza P.U.D. on the west, and Soundtrack on the north. The project � cove�s 0.83 acres which is currently undeveloped. Recent construction has installed a box culvert across the site to convey Mail Creek flows under the Arbor Plaza improvements. Completion of the box culvert project included fiUing the site to accommodate the Fazoli's � improvements. There are no irrigation facilities in evidence on the site. Mail Creek is a major drainage within the city. II. Drainage Criteria The conclusipns of this Final D�ainage Study are based on the criteria presented in the City of Fort Collins Storm Drainage Design Criteria and Construction Standards, May 1994. Developed runoff was calculated using the rational method for the 10-year and 100-year events. Since the project lies immediately adjacent to Mail Creek no detention is being provided for this site. III. Orainage Basins The developed lots which are a portian of Arbor Plaza have installed storm sewer facilities which convey site runoff from the respective site to Mail Creek drainage. The box culvert construction mentioned above connected the individuaf storm sewers to the box culvert. The only off-site area upstream of the srte which does not have existing drainage facilities is the undeveloped parcel west of the site. Runoff from this area is negligible at this time due to the existing pervious surface and small area. The site area will be divided into three sub basins. for the existing storm sewer on the plat. Basin A covers 0.34 acres on the south side of the parking area. This basin is partly covered with existing asphalt being used for parking by Ethan Allen. Basin A will drain towards an existing sump inlet located an parking bay south of the Fazoli's site on the Ethan Allen site. The existing inlet has adequate capacity for the additional runoff. An existing 24-inch RCP will convey the runoff from the inlet to the Mait Creek box culvert. An easement will be dedicated Basin B covers 0.73 acres of the site and include the proposed building, drive thru lane and all parking on the north side of the site. Runoff from Basin B wiU flow overland towards a Type R inlet in a sump located in the northeast portion of ihe site. The proposed inlet will be connected to the Mail Creek box culvert. If the inlet were to become pluged with debris the overflow would drain to South College Avenue. Basin C covers 0.05 acres of the site in the landscaped area along South College Avenue. Runoff fram this area drains directly towards South College Avenue. 1'his unofficial copy was downloaded on Jan-04-2022 from the City of Fort Collins Public Records Website: http://citydocs.fcgov.com For additional information or an official copy, please contact City of Fort Collins Utilities 700 Wood Street Fort Collins, CO 80524 USA ' � � � � IV. Erosion Control FINAL DRAINAGE STUDY FOR FAZOLI'S AT ARBOR PLAZA P.U.D. Soil erosion from the site will be controlled using standard erosion control facilities. Sediment � leaving the site is not expected to be a problem since all the sediment will drain into the central inlet and the existing inlet. A straw bale inlet filter wil! protect the central inlet while a gravel filter will protect the existing inlet. Straw mulching will cover approximately 50% of basin B � in order to help prevent on-site erosion. A silt fence will be constructed around the perimeter of the site as to prevent construction activity disturbing the surrounding area. Furthermore, water trucks will be provided to keep wind erosian in check if called on by the City Inspector. � An erosion control escrow of approximately 53,450.00 was calculated to secure the appraved erosion control measures. ' V. Conclusion , The design presented in this report will provide facilities which adequately and safely canvey developed storm runoff from the site and discharge it in an acceptable manner to Mail Creek. Keith E. Hensel, P.E. Colorado Registration No. 28345 For and on Behalf of ADAMS-AVERY, LTD. � his �mofficial copy was dowi�loaded on Jan-04-2022 from the City of Fo�� Collins Public Records Website: http://cirydocs.fcgov.com or addit�ional information or an official copy, please contact City of Fort Collins Utilities 700 Wood Street Fort Collins, CO 80524 USA CALCULATIONS Phis unofficial copy was downloaded on Jan-04-2022 fi-om the City of Fort Collins Public Records Website: http://citydocs.fcgov.com For additional information or an official copy, please contact City of Fort Collins Utilities 700 Wood SYreet Fort Collins, CO 80524 USA i > :,� ;; �� 1L1 W J tL W N N O O O O U N N � ova N fY fY �1 N f`� � �0 l �A.:��/ .4 fJ-�� - D•�.3�f A�- G�o O- �� - - �'� � ' /� !' ,,5 D M/h/ C�Y INS�C��To��/ � / O � G b �p .~ !��(�? C �c� - 7 ;Z G,� = ��•�� q,� �0,,3 � _ �, 3 8 �� Fs �� —�I�. �9} �7 z> ��.�3�) - �, i� �,�5 / / ��Si� a �IR_F� = d. 73 ��- -- �io — �� . - C'ia� = D• �� T = �S D ��! 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" � L�o = 4•C� �,�, = �. z � �,o � � o, g� �q.� (o,�rs"� =.3. �� e�s his unofficial copy was downloaded on Jan-04-2022 from the City of Fort Collins Public Records Website: I�tfp://citydocs.fcgov.com or additional infonnation or an official copy, please contact City of Fort Collius Utilities 700 Wood Street Fort Collins, CO 80524 USA �. .�� V1 N � W W LY W :/1 1/1 tA 0 � � oa N . 7 a ce Cr M ��r �� . �F < i � a �, f ,q- R�� = D 95g -r" D• 3� = 1, 3o y� C,a - o.8g c,�, = o- �9 � � = ,�• b �� — �• � , f G,00 = 7 Z (-�,o = �o,�s)�q.�) �1.� = 5'zl� Q ioo - �D,�'1��7•Z, �!-3> � �d-33 �. .r3R-s 1N r3 A��f = b� 7�3 A� �,o-= D.�� CI00 � �' �� 7� - �so �� C �Y 1us�-�-rl�`/ J v v G�c� ~ �'• Lo ��o � 7' Z - , � . � - �D. � � !. �-.� ��. ;� = ,� �� ,=� ,o ��,�� _ ��- �a C �- � C o�,3� -= �-- �7 � FS � r is unofficial copy was downloaded on Jan-0�4-2022 from the City o�f Fort Collins Public Records Website: http://citydocs.fcgov.com r additional iuYonnation or an official copy, please contact City of Fort Collins Utilities 700 Wood Street Fort Collins, CO 80524 USA � 1 j- � ' r �- � � . � r _ 0 RaINFAtI.�PER�'ORMANCE STAMDAR� EVALUATION PROJECT:---i��-l`Jr �� ^r��?c,� P�'r��l� ---------STANpARD FORM AwI � � COMPLEiED. 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DATE: llIC21=�5 � Erosion Control C-Factor P-Factor � Method Value Value Comment � ---z-�Fl.P- E-se�L '--------I 0---------�-�--------------------- � �'�r�c: j��Uc . c.c i � � c �r.� �, £ � . � �..{`t;tJ�� Ll{',�`aC I�V -�,�. YC I, r1 ! �i�r�:.� �AI.E� },G �.a F^�t �� I �� '1 ULC�-� � , l.r��(r, i r� ��`I`= 1� � .. —._; ri�c� ►,o �`, ;: ��;r:G::�,;�:;��r,L�==+--_ __ � MAJOR 3ASIy PS � SUB ( �) � BriSIN ��:-iy j ' �-- � �REA � (�,c� � o,3y , � _.._--- I'� Ca.LCUL.aTIONS �=��s/��r�t�� Cc`'/� �:~c>,�.,,�---_ -c.z2 ��,:�_. l�-.f',1�� l:c::A_,� G.3'-t �•Z2 � C. { Z i.c� ,., �.1.�� C- F114�2 C(o,o�0,22� iCloc_fo,1Z�/O,?Lj _ �, � u;-� P-�'rc...�� G,f��.�a.so� - O.`�C� Grr':.,�� s�� E"i L,i'C Y�. �� I . I � � 1 ' { I I � � � -� --�� 1? !I • � � � . I � � � � l � I I � I I � I .. � I - � , � � � C i o,0� t��2 �� z� a ,._ r �— �,4C j� y �CY�:� . f�r�,v�1w<<�� "�c�,�a.. _._ - --.._ KC.>>.ir�;�!,rJ� C>_c.�:��.�, = �.7? -,�`� -- I?�iQ�: C�='��'��'� - 2f% �,��. S�(_,�rJ !+r'=L�,r��'�i � �%:.,: .L G= " -. �`-J.�ccfc� � 0,O�7r,z�e.; � O . C� ,�z;zi.5 I O, 33 �z�c= � Q� .I , _.? �!-c,<.:= .. . U�7i) C-FPC.;�;� ��.G1��.Ci'� C�.p��33�{ (C!��`j .�1? � O �� rr� P-�:c�� Co��Co.� � - o.�ta _ s'r'..w ,l+ � �k �r c� F�r - �� - �,�s�C,�o�� x�� _ 8�,clo �i:t SeIL 100`/ -- - o.cL�rtt,'Lc.� WTi� G-f71Z.ic� C�oc ,c� � - X - _/.�- ! , r��c� Urrp �-��'rz..�� -Cs> : - o. ;v ��zr r�.,��: - C� • �/—�r,o`_(,5�1,:�:.p - .�i�o EFf.,� _ [E�.�,(.�ti�-i��,n(.�3��-��lZ � ; unofficial copy was downloaded on Jan-04-3022 from the City of Fort Collins P�iblic Records Website: http://citydocs.fcgov.com additional infonnation or an official copy, please contact City o1' Forf Collii�s Utilities 700 Wood Street Fort Collins, CO 80524 USA CO`STRliCTION SEOliEVCE ;OJECi': �t...i�S � fl-('c�c�.. P�r}�13 SiANDARD FQRM C QuE:tCE. � OR 19�� -`'�ONLY COMPLETED BY: �pp�,��- ��rz�, ��j. DATE: -0�—�� . � idica�e by use of a bar line or s��nbols when erosion control measures will be installed. rjor modifications to an_ approved schedule may.require submitting a new scnedule for �provai by tne City Engineer. - , - YEAfR � 95 �(� � idOi�TH � hi ��! J{ F �(�l1 I�� Y�l ��( 3 � l'� �.=• � n �--------------------------�-------- --------------------------------------------_____ 'ERLOT GR�D�NG . ! I NO E�OSION:CONiROL � . ,` - Soil Roughing � Perimeter �arrier ; � � Additional Barriers I ' Ve�etati ve �te �hods _ � Soil SealanL - � ! Other I ,I`3F;;LL EROSIC�V CONTRCL STRiJCTURAL: : Sediment 7rap/8asin InTet Filters � Straw Barriers Silt Fenc� Barriers Sand Sags 8are�Soi1 Preoaration Cont�ur Furrows 7erracing - � P.spnalt/Concrete Pavirg Other V£GcTATI�lE: Pernarent Seed Planting MulchingJSea3ant Terrparar� Seed P1 anti ng Sod Ins�allaiicn P�etti ngs/�"ats/B1 ankets Other I i i _ , i a ; -� �� f l - 1 --------------------------------------------------------------------------------------j R!fr;LrR�S: INSTALLED BY MAiNTAINED 8Y GcTr^,TION/,"�SULCHING CONI'RACTOR TE SUBi�ITTE� APPROVED BY CITY OF FORT COLLINS ON I/Sr-C:198G ; unofficial copy was downloaded on .Tan-04-2022 from the City of Fort Collins Public Records Website: http://citydocs.fcgov.com additional infomiarion or an official copy, please contact City of Fort Collins Utilities 700 Wood Sri�eet Fort Collins, CO 80524 USA �, �, :E, s.� F- r sfC'1 W z �i �: �. �, "'n �c�a nrr C..r� �< R E�,C.�� CAtc... � tT , �u �ws � � L�' �- � �% -�.�_Z� vJ - 1. � 7C �r- � 'ib �E U E�.� f►�1�G� 02 ' � .S X �Si Qr ��tot`� �o►s;�oL. (YIE�NZbS . C-� �v-.�-i�.�;2 oF . -'r-r�� i. "..� o .� �,-- � I�cvE-Lr� r�; � i - t_, G� -��1� 1- r"��t� G - `�` �,�� rr i c,= �'��oti . Cc►s�r � 1'b'1 �. �='� r �=� �,, u- �� c � 900 -�-� �.� � Z, l�/� � _ __.. . �-� r� (' L;� ': �=�`= � @ -� !o . L 2 � < �'" � r i�jQ_s��Z �L�L-2 � C � l�{g.2` e=,��1 s;n��..� rnil��t�� 0.�7 4��. �, � 333.�Z/s�� - �,� 19 3 S, o� - -� 8=i ,�� - -� l�f�.21 ! -� 12� . s5 I --� 2 2� ( . 7 2_ fp, �.� --7 � Gr�=r;-Cr' e:= � wc� '- � �C'��v __ � �S �-� 2,2`jl.iZ� � .� �� i � 7 • �8 _ 1 ._ .__..__... __�..__. s unofficial copy was downloadcd on Jan-04-2022 from the City of Fort Collins Public Records Website: http://citydocs.fcgov.com additional iuformation or an official copy, please contact City of Fort Collins UtiliCies 700 Wood Street Fort Collins, CO 80524 USA FIGURES ' his �mofficial copy was dowi�loaded on Jan-04-2022 from the City of Fo�� Collins Public Records Website: http://cirydocs.fcgov.com or addit�ional information or an official copy, please contact City of Fort Collins Utilities 700 Wood Street Fort Collins, CO 80524 USA �� iROUTMAN PWKY. .� w > Q w � w � J O U F-- � . � HARMONY ROAD z � 0 � d SITE � � vi PALMER DR. i � � , � FAIRWAY LN. ' VIClNITY MAP (NOT TO SCALE) fticial copy was downloaded on .lan-04-2022 from the Ciry of Fort Collins Public Records Website: httpJ/cirydocs.fcgov.ci iona] information or an official copy, please contact City of Fort Collins Utilities 700 Wood Street Fort Collins, CO 80524 un�a �......... .... . �nan � �r��.... ` , TABLE 3-1 (42) RECOI'iMENQED •RUt�OFF COEFFICIENTS Atr'D PERCENT IMPERVIOUS LAtr'D USE 4R • PERC�N7.._ � � FREQUE�CY SUR�ACE CHARAC7ERISTICS� I��IPERVIOUS 2-:� 5 10 l0U .4 • . Business: � Commercial Areas � 95 .37 .87 •88 •89 tveighborhood Areas 70. .60 .55 .70 .80 Residential• � _ - Single-�'amily * .40 .45 .50 .b0 , t�u 1 ti -EJn i t( detached ) �0 . 45 , 50 . 60 . 70 ; I?ulti-Uni� (attached) 7Q .60 .6S .70 .80 1/2 Acre Lot or Larger * .30 .3�5 .40 .60 Apartr�ents i0 .6�5 .70 .70 .80 Industrial: Light Areas 80 .71 .72 .16 .82 Neavy Acres � 90 .80 .80 .85 .90 Parks, Ce��etaries: 7 .1� ^ .18 .25 •45 Fiaygrounds: I3 .15 � .20 � .30 .50 Schools: - 50 .45 ' .SQ .60 .70 Railroad Yard Areas 20 .20 - .25 J .35 .45 Undeveloped A�eas: Historic Fioti�� Rnalysis- 2 (See "Latiti�ns") � Greenbelis, Agricultural O��site Flow Ar►alysis �5 .�3 .47 (when land use not defined) I' Streets: - -. .55 .65 Paved 100 ! .87 . .88 .90 .43 � Gravel (Packed) �0 .40 .45• .50 .60 ' Drive and Walks: _ 96 .87 .87 .88 .89 �� Roofs : - 90� . fi0 � . 85 . 9� .90 Lawns, Sandy Soii � 0. .00 .O1 .05 .20 �' Lawns, Clayey Soil 0 .05 .15, .25 .50 �OTE: These Rational Formula coef�icients may not be valid for large basins. � � *Sze Figure 2-1 for percent impervious. � 11-1-40 � !}R$AI�! DRAIi�IAGE A�0 FLOOD CQt�TRQL DIS7RICT ., • his unofficial copy was downloaded on Jan-04-2022 from the City of Fort Collins Public Records Website: http://citydocs.fcgov.com or additional infonnation or an of6cial copy, please contact City of Fort Collins Utilities 700 Wood Street Fort Collins, CO 80524 USA �i - _� � GENERAL NOTES 1�.�� , � � i� E , �� ' + ! ,i:. . ,, , .., � . _ ,_.. _._._._. ._ _�.. . _. _ _ _ _ __ , _ ___ __ __ __. ._ _._ ..... _... .__ _._ _.._ __ .._. ._.. .._, ._., .___ �._ _ _. _ . _ ... � - �._ - _- -_ _... ...-- --- _. __.. ._ __ ._ .._. _ _ ~- 1 __. _ .__._ _. _ _ _.. .. .. _,. __ _... _.. _._ _�. __... _... ..... _ __... ._ _ . . _ _ .._ __.. _. __ __ _._ .._- .--- - .---- -- _ .._ �.._ _. _. _... - _. __ _.. _.. __ ..._ \ -- --_ _... __. ..__ , _. ._ ..__ -- - �--- �-- __. _.. .._ .._. .� ___ -- \ - ._ ._ _ ..__. � ��-- -__ EXISTING CURB �` � �� , �lJ?TER ANp WALK � � � . � � � ` � --..._; ' . � .. , -- --__.... ._ __ __. �..._ ...__ �- ---- -- � _ _.._ F _.... __ ._._ �_.. ... _- - _ ._ ._. ..__ ___ ._ . .. _. .�_ _ - -- - .... -��.._. _ --- -.. __.. ` � _ . - -.� � �' � _ -------- 5031 f � ' ` , ' � :' _ �; ,� � _ _ .__ _ _ _ ` - ,. - f . ��. , �.,...-- �'`'` ; � ' '1, ----�^""�� PROPOSED E[)GE_ ' � , ' r _��_._._.. �..--- 50:50 , ; �� OF ASPH�,LT --h��ya � � \ � ... 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'- � .. - � I - ' / _. __ _,�_ _._ .._ _._. _�.. __ _ �..��_. ;.. -- ._ _ ... _.. _ . ..__. _ -� _ � . . --- _ . .. _ - - , . � �_ � � �` ;, . _ � � _..- --- ; / � ' � _ � - -_ _._ ..� W ._. ____. - ` , _ .� ._ . `�' ____._ _..-- . . .. _._ __ . _ __� _. __ __._ __ ._. ___ __� _ - � ,.. .._._ ._. _ `..._ .._. ... \ � l�, `�l � �� -~ / N �Z --- ---, - - -._ ----- _._- --- -- �- ---- ---- --- --- ,- `--�. � � -�- --- -==-�; _ ` I � �' I �^ � � , � , l % ' � j . ; i i � �, ��`"'� \ \ . , EXI5TI�lG 20' DRAiNP,GE ' ��' \ �..\ ,�'y �,`\ ` & IRRI�ATiON E�ASEMFNT ' � � � I �i f/ �� RF�.. � 89027308 � �` `\ � , \ ` � / � N ��`5` � � � � ; % I �� 03� ` `� � ` �' + . , ` � --- � � ; � � �� ' " � h0�° c� } \ . .. _. \ ' _ . . .. .. � a � ..�__ "__. - -..__.. �._ . . . _ ... -_. _ _ . _. � _ i ." . .T � . ... . _ . _ . _ . �_ _ '_. _ _ _' _ "_ _ _ , -__ \\ + / � ff� '� _FQ`, � � � � � �` `� �` M�TCH - = . ti,� �, � � ... , . ., E->�;�'A�+PH�LT' - "� MATCH '�_ ��`- ! � _ �2- �`L/ , � �ti `� � , � - � � EX. ASPHALT ' ..`� � C , `+ '� 3.�I__5-� � �\ � ''� ' -' 28. �a�. � � '� i � � � �� ' ``,, � ':' � .• , � J, � �/�, � ._- � � , 7 5 < <'j, I''n , ��. `� �• QZ�, �'``� `• r, .� . - �' � y (� \ !' , �Q � - � �/ ; � � . I. . . \ �tY �� • �� i � �` � . �1' Q' - � - - � 2,3 ` �1 �d�� \ \ � ` N ___ EXlSTING HANDICAf� � O�� I l� `.\ � pA.MPS � � � �� __ ' � .� � : �� '� \ i�, .:� _ ` � \ �' � j� � � \ ` ` �, , 5 Z .. �_.. _ _ .. . �... __. . _ ._ ._ , �\c � � , ' � ��' �' �° %�0 55'4�'OS" � �.._, �� i � _ r ` '� �r`�� x. 2�. Z8. '�,, � a' t� �► ,� R-13.OQ "'•' �. � � L=12 67' MATCH , � �_X. ASPHALT � ��, ,` ,� \ �� f� '� _ �1 ti% N a ! �� i � , , � �n _ 1 ; �� `� � ` . , . �._ ��' ��- - - - - --- �- - - �` \ �` A� ,` '� � _ -_ : ;,� . �2 _.�i_'3. ` ` � ; ` � : ►, �.) � ' i� '� � � `` 4a � o � �, � � �-� � �, � , ` ;; �. `` \,\ ',�/ 4' ' �' i,' 4-; ; ,` � � �' j , \ � � ExiSr�r�c CURB ---� \ � �� . ._ . .... , ` � GUTTER AND WAI.K :� •,, �� , � , ,� �� •. , SCALE 1" � 2_0' FEET 2� 0 20 40 BASIN Q,o Q,� A 1.36 2.17 B 2.92 6.67 C 0.20 0.32 � 5.26 8.33 QS 2.92 4.67 01 3.88 6.14 � \ \ . � � 1 �� Y- L J. V V � op � O � II II � � I- Z O ~�p � ��-� o- _ � �� EXIST. GROUND--,. o xJ> o>�� 5025 � - - _ _ o `r ►1 � i ._ . .--- �- _ _ . _ � � � � .__ , _. __.._ _ . _-- _ . . .. . . . .... .. . � - ` , _.. � _; � � �-- � � �-- ; -r - --� -- -�.- -- �---- , ' ! I 5020 � - . � - -. _. .. -- � - .__ .�.---. .--- --- - - -- .__ i - ---- `_ . _.._:__ .. _ __ .�._..__._._.� �. ._._�__�_. __...__ f__. _- �.-�- I ' ` � � � ! � � i � � 5015 � . .. .... ........._. _ ._.. _ _: i___ . __ i---.__.__-----_ _-- _ _ _..--.. _ __ • _ __. k . ....... _ ..___-_ 1 P � r - -- ,. _ - �- -- I ` � � 23I LF f; E IST. 8�X8' , ._..._----- _.___ ...... .... . ...- .__. � _. 15 R P � 0� j_. _- _ .__ . � X___�� tVER7 5D 10 �,._ _ -- ._ _ . _... . _ _.. _ _ .� .. _.. _ _. . � , IN .-50�3.94 ► ` " � ' � � , , � ( , � : ; � � ; � � � ...___�...... ...._ .... .�__..�..._- .. .--.._.__� a. ; .. 5005 _..... . � _.._.,__�.� �___.._. -----; _.._.... .. _...._..__. _ _- - - ,... �. _.._ _.�_ � i � , � s , ' e i � '- ; � � ! ; ; ; ; _ ._.. _ . ! ._ � . ' _ . . . _.. ` . _. . � .. , . �. , ; � _ 5ooc� �. _ _.. _ �. �.. f _ _ � _ -00+ 10 00+00 00+1 Q 0�+2�� Q�+30 � aEPRESSED CURB QET��L „ ( NC��T TO s�A�� NEW 15 STORM SEWER PROFILE SCALE: � "=10'HORZ. 1 "=10'VERT. ti' \ � �� , � ( i` � , ,ry y�. I _ � � ,\„� ``� J 1 �: ;�_ ;; i � ` � ,. \ �+ 1r' �--x.W -._- ' i ' ��+\ ` % 1 �1 `- � � � � ` ' � �•. � . � \ ''�. . � \ �,'* , y 'r� !f r `' . � , ' v, i `,P � S(JUNDTRACK NEW M�:RCER DITCN C0. 1'- A llll iTlf�l^ fl (\ iA! n n e'�� ihl�l�t EXlSTING f]/l� !�I il 1ICOT \,":., tx. AJrHA�� va.�8.; �;v � '. ' i I i _ � � � �, �_ Q � � f ' ' + I � � , O� , ' , , � � ; ' } ; i .96 � . a , � � � � ETHA�V ALLEN , v�ry�� . ,� � � `' � ` `�'�, > - `i' `':;...{'`'�Q � - � C _J� /.'� J a r\ r- <? l� Z+nr a_x � c� O �� t; N O fY m � a `� ,�: a,n cn �� ' � �t' .6 � .. � __ ._ . I � �� M,, a �.,��, � ,�. , J , i �� , Q�� `;� 3 t ��= _.-�. 5025 i� 4 4� � ir ,�', iV ' I i I � � �' ' ,' �MATCH--� ` �-'�;;�_. _.___._� EX SP LT %'' � � � NOTEs � I 7 i� �r �j � 1� � I � �. R�� i � � `� I � ,, � �� -- ' - ; � _ �-_ i x � I � � i � � � z ! . �� L � � �� h X � � � ! � s X � w � ' � 60 MIN. � � RADI�JS � � � EXI5Ti!UG 15' STCR�A � L DRAINAGE EASEMEN"I" � REC. # 8902230t3 � � r a� CY `:J � � C '� � n n� � � (j; i :` 7 I � i r,�r ! , Ij I � ' ; � ,� _____._� .. . ___- �---., � � I i• I ' � 15 UTILITY �ND � dRAiNAGE EASE�tENT � ! �; f I� � , r-_._.___�. , -- 6 � � � t I i � � i � i � I i 2�.o j �� 1;-- ADpIT10NAL RQW �� GRANTED THRU PLAT �� ,� � I W � � , ; � � � . A HA �,4 ; i O _r-- .., i !� � � � �.�� p [X.iST�NG 15 StORM � I 1" ` I i� _�� tn ��..DRairaACE EASE�!FN �- II I ,� � ._� �,,�. REC. # 89022308 ! I 1� � I' . , --- _-- __._ -- � 4� 1 1 _ 'i 3 5025 I r� � I i? ��.' - . --s`� I � � , � 5024 _ � _ + � �� i ► ' � �� m 1 j � �; � i I � U � I � z � � il.i FOR1'( COLUNS - �OVELAND WATER DISIRICT SOUPH FORT COf11NS SANITATfON UISIRICT UTI�ITY PLAN APPROVAL � APPRO�,�ED M ANAGER DATE _� _ - - Q INSTALL CATCH CURB SEE DETAIL E SHEET C6. �2 INSTA�L SPfLL CURB SEE DETAIL E SHEET C6. O INSTALL. NANDICAP RAMP SEE DETAiL M SHEET C5. O iNSTALL SLOPED WALK SEE DETAIL Q SHEET C5. O SAWCUT EXISIING ASPHALT 2' FROM PROPO5ED LIP OF GUTTER. O GRAQE EARTH BERM WITH 3:1 MAX SIDE SLOPES. a CONSTRUCT SILT FENCE SEE DETAIL F SNEET C6. � lNSTALL lNLET PROTECTION SEE DETAIL G SNEET C6. � DEPRESS CURB WITH 1-FOOT B�TTOM SEE DETAIL OF 7HIS SHEET to GRADE SWALE TO DRAfN AT CURg DEPRESSION �� TRANSF�ORMER PAD LOCATIQN & TRANSF"ORMER WILL BE INSTA� �ED BY UTILfTY GOMPANY 12 APPLY STRAW MULCH WHERE NEEDED TO AID IN EROSION COP�TROL. i APPRC�',�D SYSTEMS ENGINEER DATE �' � I PF�PARED UNDER THE D�RECT SUPERVISION OF KE�TH E_ HENSEL, P.E. #; 28345 FGI� AND ON BEHALF OF'; ADAMS-AVERY, LTD. � � � ; � � C 08 BASIN DESIC�NATlON - - - �-�-- PROPERTY LINE ( 1. THE CONTRAGTOR SHALL HAVE ONE (1) �OPY OF THE APPROVED CONSTRUCTION PLANS AND ALL REQUIRED PERMfTS ON TNE JOB SlTE AT ALL TIMES. 2. THE CONTRACTOR SHALL NOTIFY THE GTY OF FORT COLLINS PUBLIC WORKS DEPARTMENT 48-HOURS PRIOR TO THE START OF OVERL4T GRADING OPERATIONS. 3. CONTOURS 5HOWN ACROSS STREETS {NDICATE FINISHED GRADE5. TNE CONTRACTOR SHALL BE RESPONSIBLE FC�R GRADING THESE AREA� TO SUBGRADE ELEVATIONS. 4. EXISTING UTILITIES ARE SHOWN BASED C)N THE BEST AVAILABLE iNFORMATION FROM EXISTfNG DRAWINGS AND FIELD INFORMATION AND ARE NOT TO BE RELIED ON AS EXACT. THE CONTRAGTOR SHALt BE RESPONSfBLE FOR LOCAl'fNG AND PROTECTING Att EXISTING UTILITIES WHETHER SHOWN OR NOT UN THIS PLAN. TWO WORKWG DAYS BEFGRE DIGGING, i;I�ADING OR EXCAVATING CALL THE UTILITY NOTIFICATION CENTER OF COLQRADO, 534-6700 �OR THE MARKING OF MEMBER UNDERGROUND UTILITIES. 5. WATER TRUCK, IF CALLED f OR BY THE CiTY INSPECTOR, WILL 8E PE20VIDED TO KEEP WIND EROSION IN CHECK. 6. ANY CONSTRUCTION DEBRIS OR MUD TRACKiNG {N THE PUBLlG RIGHT-OF-WAY RESULTING FROM THIS DEVE�OPMENT SHALL BE REMOVED IMMEDiATELY BY THE CONTRACTOR. TNE CONTRACTOR SHALL IMMEDIATELY FIX ANY EXCAVATiONS �R EXCESSiVE PAVEMEN7 FAILURES CAUSED BY THE DEVELOPMENT AND SHALL PROPERLY BARRICADE THE SITE UNTIL CONSTRUCTION IS COMPLETE. FAILURE BY THE CONTRACTOR TO CORRECT ANY OF THE ASOVE WITHIN 48 HOURS OF WRITTEN NOTICE BY THE ClTY SHALL CAUSE Tt1E CITY TO iSSUE A ST4P WORK ORDEft (RED TAG) AND/OR DO THE WORK AND MAKE A CLAIM AGAINST THE LETTER OF CREDIT FOR ANY COSi INCURRED BY THE CiTY. 7. THE CONTRACTOR SHALL OBTAIN A SOIL DISTl1RBANCE PERMIT FROM THE CITY PRIOf� TO THE START OF ANY EAR7HWORK. EROSION CONTROL MEASURES SHALL BE INSTALLEQ AT THE START OF CONSTRUCTION AND REMAIN IN PLACE THRGUGHOUT THE DURAT14N OF THE PROJECT. ANY EROSION CONTROL FACILITY OISTURBED DURING CONSTRUCTION SHALL BE IMMEDIATELY RESTORED AND MADE OPERATIONA�. 8. AT ALL TIMES DURiNG C4NS�fRUCTION, THE CON,TRACTOR SHALL BE RESPONSIBLE FnR PREVENTWG AND CONTROL�{NG ON-SITE EROSION W ACCORDANCE WITH i HE EROSION CONTROL FACILtTIES SNOWN ON THlS PLAN. THE CITY MAY REQUIRE THAT A[)DlTIONAL EROSION CONTROL FACILiTIES BE PRGVIDED DUE TO UN�ORE SEEN PROBLEMS OR IF THE PLAN QOES NUT FUNCTION AS INTENDEC� 9. CURB AND GUTTER SHALL BE CONSTRUC �ED USING SPL�T ELEVATVONS SHOWN. INDlCATED GRADES ARE FOR RE.FERENC� ONLY. CONTACT ENGINEER REGARDING DISCREPANCIES BE rWEEN GRAQE ELEVATIONS AND �LOPES PRIOR TO CONSTRUCTION. LEGEND � BUILDING ENTRANCE LOCATION O CONSTRUCTION NOiE� - PROPOSED CURB ,4ND GUTTER ____ _______.--__.- ----... _._ _ . ....._, EXISTING CURB & GUTTER � ° ° d PROPOSED CONCRETE PAVING w a. � a a n Q PROPOSED SIDEWALK PROPOSED STORM SEWER _..... ____.So�� __,.___._ ____._ EXISTING CONTOUR � PROPOSED CONTOUR .26•,�g PRUPOSED aPOT ELFV�,TIONS EGA EDGE OF ASPHALT - - - - - - SILT FENCE �"`��'�� BASlN BOUNDRY A D A M S- A V E R Y, L T D. Deve{oprnent Consultants and Consulting Engineers � ':580 I.awrenc» Sf., SuMs 870. Denwr, CO 80204 303 620-�454 Faa a2o-a�3a FAZOLI'S AT ARBO� PLAZA, P.U.D. GRADING & EROSION CONTROL PLAN DRAWING DATE: 06 NOV. 95 � K:\F7FTCOL`�,C4.DWG � SHEET: C4