Loading...
HomeMy WebLinkAboutDrainage Reports - 05/13/1998FINAL DRAINAGE REPORT FOR LARIMER COUNTY DETENTION CENTER EXPANSION FEBRUARY 1998 FINAL DRAINAGE REPORT - FOR LARIMER COUNTY DETENTION CENTER EXPANSION FEBRUARY 1998 1 1 1 1 February 27, 1998 FILE NO.: 97-072 City of Fort Collins Stormwater Utility 235 Mathews Street Fort Collins, CO 80524 ATTENTION: Mr. Glen Schleuter RE: Larimer County Detention Center Expansion Dear Glen: Enclosed is the Final Drainage Report for the proposed expansion to the Latimer County Detention Facility. The expansion to the existing facility is proposed on the property that is currently owned by Larimer County and is occupied by the existing detention facility. The property will not be replatted''.as there is no expansion planned beyond the existing platted parcel, and no additional easements will be dedicated. An existing utility easement is currently being vacated due to the expansion of the building footprint. This report was prepared to answer the hydrologic and hydraulic concerns regarding the changes proposed by the expansion of the facility. The expansion is limited to building construction and in expanded parking area that will cause a slight change in the current imperviousness of the site. Some of the existing parking lot and drives will be converted to landscaped areas that will reduce the overall increase in imperviousness. On -site detention is not called for at this time. However, depending on the outcome of in -progress reports addressing the overtopping of Timberline Road, and the capacity of the Vipont Ponds, limited on -site detention may be necessary. The owner (Larimer County) is fully prepared to address limited on -site detention should this be required after consideration of these reports. This report was prepared in harmony with the Final Drainage Report prepared by Stewart &Associates for the expansion completed in 1992. This report complies with the City of Fort Collins' Stormwater Design Criteria (current at the time of the preparation of this report). By your review and approval of this report, we can assure the project was completed within the standards and specifications of the City's Stormwater Drainage Criteria. Should you have any further questions or require further discussion, please feel free to contact our office. Sincerely yours, 1 ' Rick R. Pickard, P. E. Associate The Engineering Co. 1 ' The Engineering Co. • 2310 East Prospect • Ft. Collins, CO 80525 • Phone (970) 484-7477 • FAX (970) 484-7488 ' FINAL DRAINAGE REPORT ' for ' LARIMER COUNTY DETENTION CENTER EXPANSION 1 CITY OF FORT COLLINS STORMWATER FACILITIES DEPARTMENT PREPARED BY THE ENGINEERING CO. ' 2310 EAST PROSPECT FORT COLLINS, CO 80525 RICK R. PICKARD, P. E. February 1998 I [1 TABLE OF CONTENTS I. INTRODUCTION................................................................................................................................ 4 ' 11. HYDROLOGY AND HYDRAULICS................................................................................................ A. Introduction...................................................................................................................................... 7 7 B. Design Objectives and Approach..................................................................................................... 7 C. Hydraulic Analysis........................................................................................................................... 8 ' a. Historic Conditions..................................................................................................................... 8 III. DRAINAGE DESIGN...................................................................................................................... 9 A. Scope of Design................................................................................................................................ 9 ' B. Gutter, Channel Sizing, and Location............................................................................................ 10 C. Erosion Control.............................................................................................................................. 11 REFERENCES........................................................................................................................................... 11 1 1 1 1 [1 1 3 1 1 xC Aiwa x a e ♦� t Ca�a� b 1 I ;INTRODUCTION 4 ° 4 I 1 11 1 [1 I. INTRODUCTION Larimer County is proposing the expansion of the existing detention facility located at 2405 Midpoint Drive, Fort Collins, Colorado (see the attached vicinity map). The detention facility is located south and west of Midpoint Drive and north of an undeveloped property in south central Fort Collins. The existing parcel comprises 7.485 acres (Lot 1). The County owns an additional 6.959 acres (Lot 2 which is undeveloped) immediately to the west of the current facility. A portion of Lot 2 will be developed to facilitate the construction of the incoming asphalt driveway and a parking lot proposed for employee use. Current access to the facility is provided by an asphalt driveway from Midpoint Drive. Future access also would be provided from Midpoint Drive approximately 80 feet further to the west. The access location was moved to facilitate the expansion of the existing building. A second means of access is also from Midpoint Drive, located to the southeast of the site. This access will remain as is. The site currently drains north and south from the middle of the site. This historic drainage pattern will remain after the expansion is complete. The undeveloped property to the west drains historically from west to east. This off -site runoff will be intercepted by the expansion plans for the facility and directed north and south from the middle of the site. There are currently no detention provisions on the site, and there are no plans for detention facilities due to the proximity to the Poudre River. A Master Drainage Study is underway and will be completed shortly by Park Engineering Consultants to determine the capacity of the Vipont Ponds. The final result of this study will determine the final outcome regarding on -site detention requirements for this site. In the event on -site detention is required, the owner is fully prepared to address this issue at that time. ' This report will study the impact on the proposed drainage features as shown on the construction drawings prepared by the design team for the facility. This report closely follows the Final Drainage Report prepared for the 1992 expansion and submitted by Stewart & Associates. ' A. Scope of Work The areas of emphasis, included as part of this investigation, are: ' l . Hydrologic analysis 2. Hydraulic analysis 1 4 1 No Text J 1 B. Executive Summary This report was prepared for the Larimer County Detention Center in south-central Fort Collins, Colorado to evaluate the drainage improvements proposed as a result of the expansion to the current facility. The site is located within the boundaries of the Spring Creek Drainage Basin. Our investigation and report will comply with the guidelines established for improvements within this master drainage basin as set forth by the City of Fort Collins, Stormwater Facilities Department. ' Proposed improvements to the site include the construction of asphalt parking lots, asphalt and gravel drives, concrete curb and gutter sections, grass -lined borrow ditches, buildings, and associated landscaping. The drives and parking lots will be used to collect (by means of gutters ' and/or borrow ditches) and convey runoff to the release points either on Midpoint Drive (for the north basin labeled Basin II) or Midpoint Drive (for the south basin labeled Basin I). ' We have also investigated the off -site basins and their impact on the storm runoff through and around the site. Midpoint Drive will collect a portion of the major storm runoff that overtops ' Timberline Road per the report prepared by Northern Engineering. The study by Northern Engineering has not been accepted by the City of Fort Collins Stormwater Utility department and ' therefore, quantities mentioned in this report may change. A diversion swale was proposed by Northern Engineering as a means to intercept a portion of the runoff that overtops Timberline Road. Currently, the report indicates 8.84 cfs will pass the diversion Swale and would be carried by Midpoint Drive. However, this number would increase in the event the diversion swale is not constructed. The owner of the Detention Center is aware of this situation and is ready to discuss implementing on -site detention in the event the swale is inadequate to handle the combined runoff ' through the Advanced Energy site. ' Overflow runoff that overtops Timberline Road as well as natural runoff from the off -site basins flows to the east in Midpoint Drive. The north flowline eventually dumps stormwater onto Specht Point Drive and Prospect Parkway. Flows in the north flowline do not contribute runoff to the ' cross -pan on Midpoint Drive located in the southeast corner of the detention center site and therefore, do not enter into the calculated flows to the cross -pan and through the Advanced Energy ' site. Flows in the south gutter join flows from the north basin (Basin II) and eventually exit Midpoint Drive by means of a curb opening on the east flowline of Midpoint Drive by the cross - pan. ' Flows leaving Midpoint Drive through the curb opening enter an existing grass -lined swale in ' Prospect Park East P.U.D. This swale flows to the existing Vipont Pond. Stormwater then exits the pond by means of existing pipes (culverts) under Sharp Point Drive to the City of Fort Collins ponds and eventually to the Poudre River. Advanced Energy is planning improvements in the area ' currently occupied by the swale. Their construction plans address the need to continue passage of 5 1 storm runoff through the site. We have discussed this need with their engineers and have been ' given their confidence that their improved stormwater conveyance system (asphalt overflow swale and storm sewer) will be sized to handle the projected major and minor storm runoff as discussed in this report. In the event the runoff which overtops Timberline Road exceeds 8.84 cfs, (assumed in ' this report), the additional runoff will need to be addressed when sizing the swale through the Advanced Energy site. ' In summary, the City has not accepted the report prepared by Northern Engineering. Also, there is no commitment to building the diversion swale. Therefore, the final numbers used in this report to recognize the overtopping of Timberline Road may change and would be addressed in an addendum to this report submitted to the City Stormwater Utility Department final to issuance of a certificate of occupancy for the Detention Center site. ' After consideration of the proposed improvements to the site, the off -site undeveloped flow ' contribution (as described by the report prepared by Northern Engineering), and the major storm flows that overtop Timberline Road, we believe the existing drainage facilities (including Midpoint Drive street section and the existing cross -pan and swale) are adequate to handle the increased flows ' due to the increase in the imperviousness of the site. [1 1 3 4MROLOGY'ANIlHY'Dz RAULICS z I xl ' II. HYDROLOGY AND HYDRAULICS A. Introduction ' The hydrologic techniques and analytical tools utilized in the design flow hydrology for the ' proposed improvements to the site are described in this chapter. The facilities constructed as a result of this analysis will convey the runoff resulting from storm events with the design frequencies of 10-year and 100-year recurrence intervals. Because there will be no detention planned as of the time of preparation of this study, the facilities constructed (as described by the construction plans) will be sized to carry the major storm to the site release point. ' B. Design Objectives and Approach The objective of the hydrologic analysis for the detention center site concentrates on two principal issues: 1. Investigate the impact of the proposed development upon the changes in the ' magnitude of storm runoff. 2. Designing for the conveyance of storm runoff by means of appropriate strategies as ' specified by the applicable drainage guidelines of the City of Fort Collins and compliance with the stormwater drainage report prepared for the 1992 expansion as prepared by Stewart & Associates. ' The Rational Method, in widespread use in the Colorado area, will be utilized for the determination ' of the runoff magnitude from the site in the developed condition and to check the appropriate means of conveying this runoff. The Rational Method is recommended for sites less than 160 acres. Basin I (7.26 acres total), Basin II (16.19 acres total), and Midpoint Drive (3.28 acres) for a total area equal to 26.73 acres are within ' the acceptable size limitation. This allows the use of the Rational Method. Accomplishing the modeling objectives has been attained through a sequence of model simulation ' runs for the contributing basins both on and off the site. (Please reference Exhibits A, B, and the Historic Drainage Map). The 100-year storm output in the developed condition has been used to check the capacity of the existing drainage features. Our analysis of the minor storm (2-year developed) and the major storm (100-year developed) runoff indicated that the existing drainage features were adequate to handle the projected flows. 1 7 C. Hydraulic Analysis ' a. Historic Conditions The site historically flows to the north and south (reference the Historic Drainage Basin ' Map found in the Appendix of this report). This flow divides the overall basin in the middle of the site. Because the facility will be expanded, the proposed grading plan follows closely the historic drainage pattern. The off -site undeveloped contributory basin flows ' historically from west to east. The existing facility intercepted flows and routed them to the north and south also dividing in the middle of the site. ' Expansion of the facility will encompass a portion of the undeveloped property to the west. The historic drainage pattern will continue dividing runoff from the west to the north and south joining the historic drainage configuration currently in use on the site. 1 1 1 8 [J 1 1 1 1 1 1 1 1 1 1 1 1 1 �:.:::. x u I 7 III. DRAINAGE DESIGN A. Scope of Design The site is proposed for the expansion of the existing detention facility. Because we will be expanding the current use of the site (buildings, parking lots, and driveways), the permeability of the site is reduced. The site is planned for areas of building construction, private drives, a parking lot, and landscaping. The site was platted and constructed in 1981. The site was expanded in 1991. Stewart & Associates prepared the Stormwater Drainage Report for the expansion. We considered this report in the preparation of this final drainage report. We have considered a composite runoff factor when calculating the developed storm event runoff and have included these calculations in the Technical Appendix attached to this report. Runoff from the undeveloped property to the west of the detention facility flows from west to east. This runoff will be accounted for in the design of the on -site stormwater features. Storm runoff in the major storm event will overtop Timberline Road. We have accounted for this additional off -site runoff (as presented to us in the report prepared by Northern Engineering) in the consideration of the existing stormwater conveyance elements. The on -site basin is divided approximately in the middle of the site. Runoff generated from the north half of the basin (Basin II) flows to the north to Midpoint Drive. This flow travels to the east then south on Midpoint Drive and eventually exits at the existing concrete cross -pan in Midpoint Drive. Runoff generated from the south half of the basin (Basin I) flows to the south to the existing grass -lined swale. Flows continue to the east in this swale joining flows from Basin I1 at the cross -pan. Storm runoff exits Midpoint Drive then flows east, then north, in an existing grass -lined drainage swale in the Prospect Park East P.U.D. to and through the existing Vipont Pond. The capacity of the swale is approximately 96.7 cubic feet per second (cfs) as described by the approved Prospect Park East P.U.D. plans submitted to the City Stormwater Utility on September 10, 1984. The swale was modified in 1988 at the time the second Vipont building was constructed. A storm drain was constructed under the swale to drain a loading dock area at that time. The swale remains the same section with a 2-foot depth, a flow line width of four feet, and a top -of -bank width of 18 feet. It will continue to carry the 96.7 cfs, which is greater than the storm runoff quantities developed from the west including the increased runoff from the detention facility and flows that overtop Timberline Road. Stormwater then discharges from the pond by means of existing culverts under Sharp Point Drive and through the City of Fort Collins ponds to the Cache la Poudre River. We are aware of the development plans proposed by the construction of a new building by Advanced Energy. We have been in contact with the development engineers for the site, Park Engineering, to discuss their development plans regarding the existing swale through their property. They have indicated an asphalt Swale and underground storm sewer will replace the existing grass -lined swale. Their calculations indicate the swale can handle our proposed developed major storm runoff (on and off -site flows) equal to 60.4 cfs. The capacity of the Vipont Ponds is being addressed by an overall basin study being completed by Park Engineering. There has not been a requirement for on -site stormwater detention for this area because of the close proximity to the Poudre River. There is no detention proposed at this time for the expansion to the existing facility. However, depending on the outcome of the Vipont Pond study, M I 1 1 detention may be required as a condition for acceptance of the Detention Center expansion and will be addressed at the time of acceptance by the City with the Vipont Pond study. An addendum to this study would be prepared by this office and submitted to the City for review and approval. On -site detention features would be constructed by the owner prior to issuance of the certificate of occupancy. There is a portion of the Spring Creek flow (in the 100-year storm) that will overtop Timberline Road and flow easterly in Midpoint Drive. This area was recently studied in detail by Northern Engineering. This study was done for a proposed development west and north of the detention facility. Their calculations indicate that the 100-year storm event (approximately 8.84 cfs) will overtop Timberline Road and will be carried by Midpoint Drive. The study also indicated a diversion swale would need to be constructed to intercept flows that overtop Timberline Road. It was indicated to me by the Neenan Company, owners and developers of the Prospect Office Park, this swale would be constructed even if the development proposed for the area is not constructed. Recent flooding in the area has brought to their attention the need for this interceptor swale. Midpoint Drive flows to the east and discharges runoff carried in the north flowline of the street to Specht Point Road and Prospect Parkway and does not make it to the concrete cross -pan. Runoff in the south flowline of Midpoint Drive flows to the east and south to the previously recognized concrete cross -pan. The information obtained from Northern Engineering did not address how much of the 8.84 cfs would be carried by the north or south flowlines of Midpoint Drive. For our calculations, we will assume half of the 8.84 cfs, or 4.42 cfs, would be carried by the south flowline of Midpoint Drive. Further investigation into the capacity of Midpoint Drive and the off -site swale indicates the entire 8.84 cfs could be carried by Midpoint Drive. Therefore, it is of little concern exactly which percentage of the entire flow is divided by Midpoint Drive. As the report prepared by Northern Engineering has not been approved by the City and the swale has not yet been constructed, the final runoff amount carried to the cross -pan by the south flowline of Midpoint Drive may increase. In the event the final accepted runoff amount is increased, we would prepare an addendum to this report addressing the additional flow and the means to safely pass runoff down Midpoint Drive through the Advanced Energy site and then through the Vipont Ponds. If on -site detention for the Detention Center is required, the owner is prepared to address this issue prior to issuance of the certificate of occupancy. ' There is an undeveloped parcel that lies immediately west of the existing facility that flows easterly towards the detention center. From our observations of the existing topographic layout of this parcel, we have determined that runoff divides into a north and south basin at the west ' limit of the proposed parking improvement and will be accounted for in .the storm drainage improvements planned, or the existing •drainage features of the site. Neither the existing detention facility nor the proposed expansion is located in the Spring Creek Floodplain according to the current FEMA mapping. B. Gutter, Channel Sizing, and Location We have calculated major storm runoff from the site in the developed condition as well as the minor storm runoff. This rate of discharge was used to investigate the capacity of Midpoint Drive and the existing grass -lined swale located along the south limit of the existing facility to handle 1 10 11 the predetermined flow rate. Please reference the Technical Appendix of this report for a review of these calculations and findings. C. Erosion Control The proposed site was evaluated for erosion control requirements. Some of the criteria addressed in the analysis included the location of the site, the size of the development (disturbed area), the amount of over -lot grading, the slope of the existing and final grading, and the type of soil. Erosion control issues considered included sediment loss during construction. The site is surrounded to the north and east by the existing development. To the west and south of the site, the property is undeveloped but overlain by a thick, mature native grass that is mowed for maintenance. The potential for erosion of this soil was considered in determining the erosion control plan. The erosion control plan will minimize dust and sediment loss to the greatest extent possible. The development will require over -lot grading to facilitate the expansion of the existing buildings ' and construction of parking lots and driveways. Such grading will require the removal of topsoil and vegetation that currently holds the soil in place. The erosion control plan will focus on providing a means to prohibit the release of sediment either through the air or by storm runoff. To ' control the release of sediment, the erosion control plan shall be by means of strategically -placed silt fences and hay -bale barriers to trap any sediment before leaving the site. ' Silt fences must be in place at the start of the grading process. As the grading continues and the final grading is more defined, hay -bale barriers will be placed along the defined drainageway to collect and reduce the velocity of the runoff to deposit the sediment load. The site will be ' watered periodically if necessary to contain dust as required. Hay bales will be placed along drainage channels entering Midpoint Drive and the existing swale on the south side of the facility. ' At the completion of the over -lot grading process, all disturbed areas will be covered either by seeding, sodding, or all-weather surfaces such as asphalt paving or gravel. The newly -placed seed will be protected against erosion by means of hay or straw mulch until the grass has a chance to establish itself. As the site is developed, the potential for erosion and sediment loss will ' decrease and the erosion control devices can be abandoned. Until such time, the contractor/developer must maintain the erosion control devices. 1 ' REFERENCES 1. Storm Drainage Design and Technical Criteria, City of Fort Collins, 1984. 2. Urban Storm Drainage Criteria Manual, Volume 1, Sixth Printing, September, 1978. ' 3. "Handbook of Hydraulics", Brater and King, Sixth Edition, 1976. 1 0 11 . 1 1 1 1 1 t 1 1 WrAN09"Llml," ,s � b �Ry Y a °i -7 Historic Basin Calculations I 1 CLIENT_ PROJECT 1 MADEBY DATE CHECKED BY C4r,4 )'/.rIdN� 11 1 ✓ I� /V,0KIrA lfl _►A � V�G 1r 4 J i r, IOB NO CALCULATIONS FOR y SHEET �. OF f � r . t I The Engineering Co. ' CLIENT_ PROJECT MADE BY 1 1 1 1 CALCULATIONS FOR DATE CHECKED BY �01*,p%a 4,01 0A1 r.5. C ,��bddrry JOB NO. SHEET OF a�Ylov, b V'j VA 17?4.�° �/%�'1 ✓, j�I 1? 1�5) i7 S - t .. 14_4 —F—t u+4r*`..«j Wr � - _ .d � >�.^•,'1; f �'Y' � ..+K_ R'.n Msy+ab. a yr„r .' +' 44 1 _ IL 14 3.C_c� �o�-r J 2,_ qz�o;� 4 } S- -;.-r +14 1; iij' -T j 7 Tr I 1I 1 -• r .j' f 1 ;; .J 1 4- 3d 1-- -t. i .-a i ♦ �reyi.. , r . I 5 y... _ 4j/��-'a �.�i ..J C .4"."')-"�„v� "¢„ +^Y' Y t .�c.,m -, A,. ��,..✓..i .� �T"..?`.'4^ .'6t" , 't.. .� '.r 77 1�it 4-1 .7 Y ♦ a' t i ) a ..- 1-,- ! 1 ~ (_....;._ ;-.{ a i a- 11� r--r-a-+---{ I 7 I (� i la'i^ j� .« }•,.: .a.. �„ 6�ir.+I!L,,A' T..i } -i l t i--Y T ' I 'w '� T i' �'- t '�' ' 7 r - A- 4- { t"' i 7,' ., i t i i i t j l My .The Engineering Co. I ' CLIENT_ PROJECT ' MADE BY CALCULATIONS FOR DATE CHECKED BY DATE JOB NO. SHEET R, OF v � � . � y►•t ,4S 0'�• Ciao � c�NyJ �yly�11. d yi �'� ' fi�� �� ba"s ��1.i'v✓did info Ate, n.� ryh 1 �•. . 'It rl-� 1 +�h�vr�A: ham. ; B LL_ L 4V,r} The Engineering Co. CLIENT PROJECT MADE BY DATE JOB NO. CALCULATIONS FOR CHECKED BY- DATE SHEET � I OF ' V1a fir• to % `�1:�1 �/�'I • ,%1%. off' �G'_ � �� a• m��l - C. �1/c�r��, Gd/r%iij?�c� �J/�ii?S� r �. �10,0 Z 1 J ' i 1/ram « - l t -T ��j `,����� � .�d_, 3 `� ���-' _ �. v ..6 rrri� r � ran ��h �- s� �� o,h� � • J k4 1 .. a. f t i � .. - 1 . t$ _--• a .a �y7 J--. y a r. 1 La— n( �w t i i_! } - u{.y._ , i I IV A „ n�a y 54 , f i 1-d r_... 1 .. 1--+-�-�{ -.. 6 l ..4 .F. _. t A I �1. r r ♦ J..-I. r- I 1 < L - y .. ♦ 2� a- �fi),1•}�I�-.}�,.- 4i.l.. ��,,��, ¢,,��3�_�e�, ,, Lf r .41, I ate. � ll I w.n. The EngineeringCo. CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BY DATE CHECKED BY— DATE SHEET �� OF -...-, = r Y _ i - 5 "T'^i-I�i-"`" I "" ✓ �(_. �i 7 J� , ` La 4 .j lT J• - ? f_ I� r i `.. t ��. G-J. }. 1 .�..�.I- a 1"7 J • 'i , w � �s.. t J�A._. ..e .. L,.J-.d r �� -{ r..` .,.h.,.� S'-Y' r ••v`.i.�. I y e k-w-f .cam r 1- ..r,. .. • , r'' 1 } , i i r f r I 1 ( y. �. — 3 t q. T 1-1 i r� ri , 1 I I 7 • �._,.�._�,..,. � r + � '_ � r �r i T (_f —t+ - �- I , '�"� L J ID 1 I `I i L , t r -r , i 1� t �-; � ;• 1.., � r !- - J f...r 4--f T 4. -j-' „ �. , r.. 7,.J y j ir._ ♦r , _ tv 1 / ✓�.� �•I f 1 - - ' s1 5 >••� r L-' ! �. --y. r -.. .ri i3 t - S.�/1 t -� {'—r' .� I ;... ,s ' _-�r .. _i.,�/'-/�i "'... e ' I�Pa'� , ,1 tin �0 c�J °As v �'' � �'t coo T c} 2 ,�PJ✓,i` ` m /&A�1�7f`%l��'' �O...ir, 1 � f . -t- L ... _ -�I 1 F b S 3 r The Engineering Cr J e$ a$ n a$ a$ J � °$ Z� W V fV e v mN IV ze c No ni '� Ze F c �N (J < ze UI c NN of Z ZF W W W W W O O O O rO W E Fv to 'E ro W' E v .- a �C w NN �C NN <^ Fy F Fv FE W Zv O W Zt O N al Zt V N W Z� W �C of CC m We N O `r W-K N w K N Fcr F F F <E o a %iXi NN NN QZQ J N QZQ J N QZQ J N g N N 2QQ J N N g Qz 5 N N �j V W p V p p V W p p p p p V W p O p 0 U W p p p 0 O O 18 O O w OLD nn GO �" O W sgss a� OL 88v& esci6d N � p.-p0 N t7 �pG W LL �r8 ZJ W LL LL 8823R W LL amps W LL sus A c m c m A m o g O R m 0 q m 0 $O6.RV ysy �ECF °gg$5 3 S y8 A a K c; S6 U O C w _ E 'o Csy C jiC'( O R' y4�¢{ y 8 E L"'y 1Sg O R' Og S EaEa }} gji jd p2C $ LLS ZiS We S n LS b d£ PS H. R �SO aS OS6 z c Zm pp N y 4g Z m T Z Q T YI CD'g§m y F� m a m y ~ m g F¢� m a F�� �<Zp 0 g «mR �8mgs€ 6 8 m a I I 7 Ll I I CLIENT PROJECT CALCULATIONS FOR MADE BY - DATE CHECKED BY DATE JOB NO, SHEET_OF ov. pmio AP 44 LJ ow '7 m a-17 'Ar 4- - W -4- rT L 14-1 A?- 4-4 1 T' FT 71, iA hL.7 7 i1l 4-4 T 7E- 7- 4tz tAl ET I-J T Z A 7FT—TI-4 f The Engineering Co. ' CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BY DATE CHECKED BY- DATE SHEET OF• I ' CLIENT_ PROJECT MADE BY 11 1 JOB NO. CALCULATIONS FOR DATE CHECKED BY DATE SHEET �7 OF 1�4 ! /4 sy r`yf 4,nl •- a -..}.n .V,Y,.+,.e,Y.%s- . r a .. . The Engineering Co. I CLIENT_ 1 PROJECT 1 MADE BY i -DerpY,: CALCULATIONS FOR DATE CHECKED BY elk 1- t = o C/ as�Ca gC�7 { y _ G ,.... .. t LZ Ud li At i _ �,�, L 1 I L �u�^yti fE. Jj- ra�as�h a:610 syfir�Q 1 1 _ Wo ' Y - , 4C/ a � \���1..,.� r -+ - • )•--!--j -t-'J ` 1 L-t- �i + -.{ icei • 41 t + �-Y M i,...«.,l...i....�. :.q.., �q..q�, >%.,..... .5•... �.� •.n {••�t-.I -a•-j...ldy,..� 1 _ _ , -{'-�-� ---j-----t-, �-+ 11i _ , , • r 1 _i_., p' T'}.'r � •:_v �'-�' _ I.y ry r +.., i I t..;� r '_it_ 1--.. }- -Tj,. I � -�• �--�-;•- "�' ..-� i .: d-t - •.e- �.-'�.,...a ..�" 4_ t ". J _t ��' T- .t. ' i } , gT. r . -s r } � I` � ¢--•-_Y"t. c..- �,° 4 -�-�--I s ; f ; ; �_ ,.L' r {i••.Jttr.----'i rt r i-lw�l--sl".I'"•'P i..'°` ;"^L''^ yj4.•.y�..l. �,''"�;,''jI 1 r 4.4 ' .T --.: t._ j t- . �- -{-�-b ' ,-I t�4 N-I--, 't-�-t-t -1- �-�r � k . ! �! - F r i LJ I 1 _. a ' _�' _t � � 1 �_ i � .+_ I .� � � � .yet •."'T.".I.t , t r "�.�.r.+,�.,il — � f +.��- � { ..: w..�r......}s....i .�1..}«J+n .L � .. h> o.✓,..- i . 4 --�--I' _!-.�� 'it t� i- L a t 4" J i '�, !«: 1—t,c. _. - 1 .t .,,; +.{.. �..�._ t �. r_,_.;.- s., L..,t , t ,..«a-�.� ,_•�N__�.._�..-t ; r 1-•f-d..�d..w f �' e J }-- h !...!._1 I. 3.'. _. 1. } -3.- • t x' T. ! fi �1v{- i1T +i ♦ rI t -} � _ 6 ti A itom`�ii_ ._ I. '"-v_ 1�.}_. lti' t . >3 } --1•--+'; -J±- �� t--J- -t^.rL x 1 •. , _. , . � � 1 : { ,wt f I 1� . + J- - 1 1 1...! 1 JOB NO. SHEET OF The Engineering Co. ' CLIENT PROJECT ' MADE BY DATE CALCULATIONS FOR CHECKED BV DATE JOB NO. SHEET 2 OF �� �►�vrcil acb 4A, i 1 ti..t t7 t 1 5 _ 1 '1 t- i I T4r SAL•— ___�.. �- r \» / , 4 i ��f - �Y.�ry.Y� _ WR �1 .. 1_l e.-Ir -."_� -i. �._ .' l � ;.. .. i � ..__ � T J.._t _ `. r-. •F _. a_.. .I•-i i 7'� i T + �Y!!.«��/.. u.r i..l%'1[�,I 14� -I� �—if/✓ 1 1. '... ��, t I - � r Ao _TITt._-;.+_.�. J,t �— r. 1._F �- •-Ft/,) r.• �. A ♦ .,.--I. .'..�.-..; ti.id-J.-b»p-rd I-,I-.�»l •{- ' I-'�.y..�...�n+ny-.r•^I "'�. - � 4-11 -} + 4" }+-1 i. 1 �4 j17 i i -.i.. i I _r r �•..yr.�1�.-1-. li �_.i..' ' 1._.L ��I ' F r J I � 1 , TL .}. ..1 i I-r4, i .. ..i.+l. ..w.. ... _ ..r �aai..+:�-�.•.:i a. .. i_...aJ® _a..�l..+_w.. _ft...n. �..h.� .... 1_l w. ... Ni4O�: ate.: -1-d The Engineering Co. CLIENT PROJECT CALCULATIONS FOR MADE BY i JOB NO. CHECKED BY DATE SHEET_u OF h 146 69 T -1 ♦ r J.J.'f � .. } ` p a a ,,o min ,1G,%�rn.,+ - .l I V V 1��� /�;� ♦u' 4 _r..+.a1_ �J.I� I .._ .; I' 1 f I r j 1, i 1 w.Ya�r..�r ;v J'a1a..1.,n1 `m`M'.+Jm�• 4..d v-r ...nN': ���a s \. t - r- r. aI i� 1-1� 1 1 J •.1 _ �'_ ` •—.r.. I7I 1 l 1 - ' 1 , _ The Engineering Co. ' CLIENT PROJECT CALCULATIONS FOR ' MADE By- DATE CHECKED BV_ DATE — I 4-11 JOB NO. SHEET�) . . OF t CLIENT MADEBY 0 CALCULATIONS FOR DATE CHECKED BY rOB NO SHEET 1 (9• OF ta0 1 h F .. fX1_✓�✓.,.� ll I a %l�P�'`a'�b ,�v .v Sr��;;b'✓din,-_)..a'7�e�rro rl� '2c�(1,5T3.3 J-�I l�t� {. r._ --i Z r_ '-g i.-1 ���'-: - i .. f J`(1 � I• t 1.. •�-� •r f _i -. .. ID •."J.0 f ev?_cl"`M^` �w�♦. 1 b A R !� f, — V N �V �/ }a I 1 a\ i r l I 1 i 111 s. { 1 j -r- J a r i-� ..a 1 � {'" r-, , 1 1-f. A r r I I .i + i t i _ i L ♦ s " .- . J-.--h �L..z.... t�,fs..-�- t-y.-a h-�-- r e r'`j` (", �,-+<'> , .,� },..♦..,,. I ,� n. .� r_1Fy_ L.. , ;-}�j -t _..�>� i �i T � � r ' C� t}_i } •_• j.� , rr �-._-i,. ' S.,�_' t } �...,. �..i♦ �� :�.b..�..�..w.. ..+� ..r «..J �..�1..r � , f .- _ �..I,_.7.. �..d ..;-.�I..1 .fit �,i—,_E ,�-.-��... 1 j....4-..... > �� ,..., � � f I L-1- - T �� .�i r47— µ �H w .s>,p e L F,Y^' � _ ' < �'�7 I "�!-` � � r-r•+•... �,:� � 1 t-w"... I �+ ! rt �' ...,6n,., t .. S..y,.�....: N ,„... 4 ._...., y .a s_ 7- J Y - i t♦ f} �I T 7-, t I r i t -r-F t T-9-' ter _r -I t i- -'-�' ..-1 _. �, y.._ .� 1 r (( Y x -, j L r r r_ -4 t .:._ i j L l...ir 1 1. �..r . ' .i-: �._-. �' l S .. 1 a_ -rI- -t : _t. C .1_.. .� - t �- i-'}' 1 T �—r• a --1 -r!¢- 1. t �- I i 'Y' r i� - . The Engineering C ��e� � , _. __ _. ��: �,� h� �\ � �a`m`re�A�\�1���..�u3. I I CLIENT PROJECT MADE BY- DATE CC9 4:1141TIE- T A CALCULATIONS FOR CHECKED BY- DATE JOB NO. J.. A L L T Ll 11-4 + j 4­4 H +1 J �+LUi_' L _L� SHEET -2 , OF i-4 i ;.fir. - 1 11 L I q_!­ J I .4_ The Engineering Co. Storm Drainage Design Criteria 5( 3C t-- 2 a z w U cc Q. 10 z w Q. O 5 N w ¢ 3 O U 2 K w I -- a 3 1 5 .i Page 3-7 3 3 4" 0 o° �► ---�Q — 0--3 P O U - - ? i 3 ti ~` — . �? a W O Cl T T 3 0 y I r OW 4r 4 O `W QT 2 .3 .5 1 2 3 5 VELOCITY IN FEET PER SECOND FIGURE 3-2 10 20 ESTIMATE OF AVERAGE FLOW VELOCITY FOR USE WITH RATIONAL FORMULA Most frequently occurring 'undeveloped" land surfaces in the region. (Adapted from: 'Urban Iiydrology for Small Watersheds", Technical Release No. 55, USDA, SCS, Jan. 1975 ) Gp cMirw vriM No Text ' CLIENT_ PROJECT MADEBY I 1 [1 � I -A . s DATE CHECKED BY CALCULATIONS FOR JOB NO SHEET 3 OF 04--cs lye-0 n'U-Gi71440 I%.�..`_+' 4t; _;-,.. J t:- 1 t_..� _+r ;ii <�/ .-1 r i .;.- ( J- 1 _•_« � I .1.-i �-E-�-_f.. * .'j. L_y_.j._ � • � ' i +�,{//��/'V g _-_lLt_ 7GG y� i � f jij 4._1-t t r�-{-�1 , a ti �� fJ-t ' s , y ' ``r ' - _' i I l-r-. r j T?• �.t e 1 r f- g , �- r = .:_ .. I �.. _ ., ->7 t -r ! i F .. .�. r J I i_� �� meµ: .� 1.�.-.1 ��.. r'/ .;—V'_�-�_�.�,.`'�. i.�; a ✓�l}%�'�/// C/���N�%// 1-r �. i..l a �.. a �. -, r _.,. r �. r t '_ � i .. � . i e I s � , t � + i - � { { � � : + r ' (_ ♦- - - f i t'Poe I i/t�A y ,y I.. Sy i r , ♦ r-. ; 1 �t car: •� . !%7^��.s + ` r ijj , _ ; , [} 1 Tit- { ,'"1- i.«t �..: ...y..�.,.r... _.T _-i�i-•l.�' �o- ����t-6/1-i"k_ --J »...`,-d�--i-- f.... ,.f�; t 3 � k ! r a ♦ _ ♦r--{'T- -J a _, -a. _ r - I ,' i t v -i { r r-t � ♦ i � I 1 t y � ` "Pf The Engineering Co. i 1 1 1 CLIENT_ PROJECT MADE BY IOB NO CALCULATIONS FOR DATE CHECKED BV DATE SHEET 4—OF Le* �r r�i1� 1 n ,r rI + ,} 4 f771 � w r Qt 71 -- r r� l O r -. F 1- � ._ F' i-' i y 1- -i-. r. /� j �. } r i.. c .. p� I I• 4-� •v I. r y.j. I 3. y. i �}-.%.1 >,.,..,p. --,�, .:..+,:�.,.- ..z..,. - Y....:,,yJ. .a � ..},.», . u +_T' _ I I r• -� ( _)� r r 1 i l � i _ I t - 1* L a �� 7 1 - .1 , I+ 1_ Y�f%��'. "���°��J S ' (�.c� '.g �S.). ,� I `.�_ fi f f..� • -'��• i++' S r i —I f, 1 .1 ..f 1 t _ _ I ` Y � i t � - � J � ' T , � I ti iJ , 1 _t y f - t f-Y -t-+- -• 1 ++ _ t 7 S ,i z' iJ f_ Ii _l�,lf ..li -. '1 - ;�-1 _.iL � L I t1._L r 4- t._' j -«-..1 _ 1 J .. ; } , i. 1 :�- w J�•y»}• 1 1 i I`�'s .Y+.: ..-0• i-a,-•(-.�.-..+1--e�•�,-y f I I Y t 17 The Engineering Co. �a _ssC4 :m ZEmE Co ZE s Ws s F c m i F e n i F c m i F c m i F c s a o 0 0 h � m N WE F o wF. ri v W E o WE o WE F F F F z m z E2 m E� m E2 EE- E�m. W E.V. win F F F F F O QVaLL LL LL � LL LL U p U N o p KUc � N ZQ KL `Q� yoLLZ'1 S� 9 9 n� g O � nn O oo Vo-m oo do H oo g g 'm"7G$�f�'iGEt-'�.m 30 L W Qo �75 LL LL LL LL LL bu2� LL� o ga85 LL � go$n g8 g `Wsssg bS�w�B a &3�a:.s g��o�8 a m58g yga�&S 10 'a g mm,j o "€ o d€`sFI o Ea yo C „pe � �E} 8 8 E �$ �} Q � i q$ E g i ii z b $ C Z N b g Z ' CLIENT_ PROJECT ' MADE BY CALCULATIONS FOR DATE CHECKED BY- DATE JOB NO. SHEET OF d''� • C�1!' Si �� !J�.S/yl � . �i-c2�,�4,r,,o�c,r �..�,� o - �r'I�� ���� � wail +�•-� �njhv��, �►��+ o f � } , ;r✓n p r5w c} t ' • Y 1 i t _ r P L1 i i r 1 ea r.y 1 Y{ Y � l . 4,11 2 , t ; 3 - g¢ io, i. HT' T + Lt- t ; 1 i SOS L, 1. 1� r r 4+ T 1 fit( Tt. f The Engineering Co. I ' CLIENT_ PROJECT ' MADE BY 1 1 i I ,I JOB NO. CALCULATIONS FOR DATE CHECKED BY- DATE SHEET V 4 OF q ' )7 7s G Fs, d-t,� L, c,o y s ��^00�, Ty? y� r Tr +._ T ITT r-f { I I ' GLIENT_ PROJECT. ' MADE BY- 1 1 rl JOB NO CALCULATIONS FOR DATE CHECKED BV DATE SHEET OF (2+ �i) C �%�. & k� C�O%N 41 M. t9 44 of 44, cS�e J�P1y( 4d YeAR Gi cSh . , y k . • 'f'. 1] ' CLIENT_ PROJECI MADE BY 1 I I IOB NO CALCULATIONS FOR DATE CHECKED BY- DATE SHEET OF Aaab ��' � fi-���/��- � � •� Gay, ,yr _ �� o��"o fib' Gv�� O� �� � �'►---a�-�'� . ����� 4147,0011 . Y .y..., ..p.. {^..5. T.., ^rws- .. r r W.�.o -Y•* a.�t,.�..�� w_ .+m.u. J.. . _ R r y ..., u- -�-.--1-H�Y 4-+,�......�+^L r .-.. r -{.. �� , f _ .r , 1 ..-•r . L t .1_....i_ ...1.. ST�7^4 ! },. !,'r- -it �YV.. _) 'i •i�! V"�C�t���-'rri�-��/.-�J+J -I�/� --•Q�r SK �a'y.7 I_, - I 41 -4 41 i I I ^ j .1- f i t i -T I.' i (-,•- T"-' �. 1. ; . �I i � 1 (A - ---• 1T"��" YM�i.�e o.rv-•; qa. ...o.y'....6 r J-9..i.^I .i..J..m. 4-y. v 4 ^' - .q.. { r a w - -.y 4.- w. I w a-• t ey��.. , i ... + Y.(�L r J T t E 1iF t �i....rt..l Y•-i..� L,. a.. , _ • • � ...:fro -...F. I ' " rri 4 - t _7' i 1i ! + I '-j-i ' �+ -•-. t � .. t r 1 � - r 5 � 4 ' - -� �' r t '. s f 1-- L . - �-}^• {. •^'. -.� a•� h , .. . i t -a.-0 t ..t f .o...I^' +'j ^.-•.r- „"�'.'"^'^.f 'a..{- i-) } -I, T!r _ ! irill,H L The Engineering CO. I CLIENT- PROJECT - MADE BY 'De r-P I JOB NO - CALCULATIONS FOR DATE CHECKED BY DATE SHEET OF & e7f,"' 60 P 60 17, � )o - aT, IPT T 7 -T 4� 1, �%►� �, yam! , �.V»r� The Engineering Co. ' CLIENT_ PROJECT ' MADEBY I JOB NO CALCULATIONS FOR CHECKED BY— DATE SHEET OF V �'•V T'V' �-_J lT VCN��� l�� �✓4 OU ✓ � (/Y a / �ia9� � iQcSJ�J� t -+W?dz, • t �,►''�s T'et�,-,r m 'ram L 1 i i 1 t- � Cr �a r _ ., J. I _tea- y .; .L�_ � �. �-�.......�._i. __ _ .. t..:- -y. _j_.' _.. _ -t { �-1. �' f � _ _ �y. .. _ .f -!•- � i - .-. �—. �a -iA t _, - �"i- � i- , - - � .1 1 - � 1 -i- • i i � � � � 1 Y 1 •----•.�. -« i .�, ✓ _-_, hij '44 T^ L '�^ Li.a.1�+'-.74-��-*-�`�. ' _ (/ y_ f ✓ t �/� i / \ (..a.�-�•V !.}��,Y l- �' 1 'V / . w.. w 41 e, c r rt r ✓ jbJ ' -J i I V � \ �, � J _ ._� � T. -.__i� fY r , } ir.f-�j T F , , _ 1 i i _ 1 • - . ; t ... .. L-1. F ; I 1 ' r. , _, ..., , ., �.� _. �..:., r ..,•. -. The Engineering,_.. Co. ' CLIENT— PROJECT — MADE BY_ 6*p.6,, JOB NO CALCULATIONS FOR CHECKED BY— DATE_ Go AA�OSY .� k cl A, �J9S r W F ' ...n.!- LI i /rL�r . e t vi {�. p�j { 1 f •• i r .i t' t.f i- i i a t_� 1 { I 1 1-1_ Lit _ 1 r -4'ft—i� .a..T 4 I �. .# - v--�"'f+n... r .d...-a� .i..q.-r..•;...� .a. '-v -, ,.ems.,.. Y i. a T. i r . Y !'t (• > —{ -' t a (+ I .1. F..�. �... , 1 ! 1 C - ti }ILL ..I_a t 4--- .Vy �. 1 _ ' i_}--n�•� _ •�• 1 . to /r/�+ a ;( f t —I_. y t ' � �1 .L�.✓1 i D� / �`��a 9a "� 74 ....t..: 1 a �- -r - �. *.y, i- L� � i( rt. _�}3t I 1 1:..y.. �.;-} �.; .. �•"�-l1 -�-�r �-t-r-'-�4-+-;: 1 .-G--� -�443-T � SHEET 9 OF I CLIENT_ PROJECT ' MADEBY 1 JOB NO CALCULATIONS FOR CHECKED BY- DATE SHEETS OF fih All) ' I I �-/r `z.�!%i JIiJ 2'�"G`%/L!�!I c5 ��' .24�" c • �S a ' �-- - -� +� yam/ r/}1fd' V�� V �• •� Y � / •(' �/ � V.-• / 640011 < 1 -a , L b �J�61 ✓1 �• Z_ Ab ,b,e�,� ♦—' -�—' i yY''•� -r• , . I t .. r —i..i_ A. t a...r '-{ I� T ♦ i +�- i i'_ i ..L�.��.�..rV. .j.._LF { L-:.� 1 y-�,ry _ ..✓ v .�..a +.''-^-Y t 1 .r. .. I_{ t— `_ . 1?'_ _ r • j ' i- t t• 1 t L 1 t _ t a _ a ' LI j I t {-1 �. 3� } fi 1 k i t �� T i♦ I v r'--t t ? , - i 1 I j 3- s i� t_, i =war'•,-.e � � ��--e d't^ - �..., t �..,,..A.,a,. ..>.,.-' �...--�--+,-...o .+.�.....e � .1L.y..; �� t I ' �..,..i,.%. �-r ; -.s. , i I r ti T I I 1 ' � J 1 1_ -+ �"� _ � "r-`,_-I-d-< a_ ,......-,�,.w � ;. l..�w, �,-r-a-i--+- �r4'Y"'-�;-c-' - .. t_. '.-� :... .._F«. ,-t i••r » .'..- 1 f , , I ♦ t I 7 .1 1_1_.i..T _y�.._ T.! . -rL Y .i [ Y �- • -.1L Lf.w ! 1 .. } i• ~ e _ .,. ! The Engineering Co 11 ' CLIENT_ PROJECT ' - MADEBY 1 CALCULATIONS FOR CHECKED BY 00•oov,&-)�Oldd �0-p a�r"elv;'117� A V/I—J/rr.V� , i � x JOB NO ' - SHEET OF _ l�j'► - �!i'29 d YI �y L� 1 r` - I.47 s � i 1 '�`-t } F--#�'•r•-�-1-t .-m-i-w±..t T ...1 ,, J....S: W..f. i ,..,.i. y'. !(-r.-.i r id dC. t � a. n 6 , i i . i , 1 The Engineering Co. ' CLIENT_ PROJECT ' MADE BY DATE CHECKED BY or �,orvi � vs a•r�Q. — �l � a $ t: ��� 3 -r. ,%� (� 3 �- 21 • Bz-r of 3. y_ tttt CALCULATIONS FOR IOB NO SHEET / Z. OF o 'r .d ' I CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BY- DATE - CHECKED BY- DATE SHEET J 3,OF <6 prs) A Z21: T 7 --r 1-7 4 7FT' � - ik_E XI L i z -j. . , ' .'Tt IT, 4 FE rt I... 1- 1-T -I­ LT L All 4 T­+ I -T- 7 J The Engineering Co. I� a$ .. Z a$ a$ a$ =E jS a$ Z€ g$ mh Ol m N (V4 Z n4 N d pi Z NN m1D i Fe H n i Fc O o f Fe O n e m Z Fe � E O m a i �- O N E � E o F E •- E ^ F E �� F � J W u ; m Z ; 3 t EE gi tc r FE +. c m tcE �?� N tc f ? m. O �LL fV < �LL N O W LLLL N 01 Q LL N a 0 O W LLLL N2Q p1_ W 4Qd LLLL N N U � O g O U � O N OU G N o VR'U N G U O Ng p QZ J n N 0 o uE p5$ N &v 0 aE 4 A 'c nc p� Z-) co c 2 '° 8n .0 nE p �� $.�� ono LL O 9 8i�s� oomo LL 4 LL IJL EggSig LL yy 11 MIA 98� W ga a gs 5 is § Ali $f Ais $ g � 's A A� nl# All �4Wf m O8 N O W m_ O�} _ .LT�Qmj m � 'b$p Q .L6 2 tll N Oj a Z CO F p ' CLIENT JOB NO. PROJECT CALCULATIONS FOR ' MADE BY- DATE CHECKED By- DATE SHEET OF _. .:;:.=d�'��••, - s�'b�. ,ate s�� � w�� Gt�,i/�rr�h�/y�. ���� � 411 J �... .�.__J_ c,'. r� y.-j. ..�.. {.,a.�`q. *w 6,./�"';'Lr•a' D�V l.Jµ�/�-� %^. _S,'-s„dk.{. .i�q..:j-.�. 1 ' .t, r.."a. ..r.., p -�'-t ,-jy_�ti[1'/) . � 1 000 _ n 4--�L"•/� i��;l'_YtPYY!/'-/ J ',�a_ .�i , , 1►0 '' '` iY Y �.1' + j-{ i-t- ;"�,-�i-rT-r-t-t--,._ - �-f"� L 1 { I •'-i - '- ' -{ i__ ! t 'Y - t - ' 'I - - - . — - t ' t4 ��'•"T .�17j-..`- •mil-lS�{'LL V ���---S••,... r fir . i t� /p `,�.,_ �i +7 4�ii Y d3t13�of r f I { i ` F + t { r 7 �! f. �Jr,� +-� _•i-j -� �fJJt i I J 1/ ` //h Tl• J- � � 1 ^-.-L.'_' , � r i � _-�� �� ��/ifrf I..ai �•j��-2 yet-.r..L d..t.� �f�-i.+..,t..,.. «,�. '.�d. �yw.a ,�i? , _ .. ►At-s '- _• _� L I 1.; . t . ' 1 •"'t'�i`i'� � -,.-. r., -. _:.� d se:..: � 11..1.- f �� , - -i-J- L 4-1 The Engineering Co. I ' CLIENT JOB NO. PROJECT CALCULATIONS FOR ' MADE By— DATE CHECKED BV DATE SHEET _ OF 1 -; : iJy �zr✓t'�A l � (/v�- �1D�ce2. � �° �''�Y�/��� d �� , "� , i%.te.. , (��:_�,�o h.e�a-n �'✓a �t� r� � b tee. J=�� � r�>rN y ..., , F,'V C!'I,Y...ri �jQ/•il���'1- �/�r �!'=/I�c1.� ,��� ..�/./. ti1<�/�f �y/• V-i��,'. � �._ v., t +'iI-jt :b'//-1��,� r IL i ✓j_' _ I , T -i }-t j-� i '..r••,,.�-1-t. ^j. 'h v.+-�1'*^p-d ..`.�.»f .,. Y� _S ( i-t{ {- /i�T}. /,1- { �. -'i r/ ��%j' (�J /� L 1... r t-_. r i j � ... .-t-} � �[X,-.'1 , � •:...1 v}-��...: 1 rT r✓--'� /-.✓, t/A-s St ..� i- . J._ 4 r 7. 1 1 Ji IT Fr LF i fr r•.V I' 1 v� �!. 4-4 41 The Engineering Co. CLIENT PROJECT CALCULATIONS FOR MADE BY DATE CHECKED BY- DATE T- -A Cl aw -4 —4- JOB NO. SHEET OF -4 �4 -4- ;A- The Engineering Co. I I I I I I I I CLIENT PROJECT MADE BYDATE — CHECKED BY — JOB NO. CALCULATIONS FOR DATE-- SHEET OF YV- -t- A' T t tie i t-4 4-, t —7 T 1 4 T 4 -L4 EP wr 4 —t T r The Engineering Co. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 w QV' OD CO M O uJ M N O = i T Ue-O r.�r N NI�oYf�> V O V N N N va Q w Qd V °'n!oPOar--w 40 UcUC 6a6 Ih 6ri CV N� fA 0 0 w In In In w In In In to O ri O w O w w w w w w w Q v MMM/'M 66 M 666 0 Q lQ U O d o 0 to to 0 0 0 0 to o w Q o a U— w w LL Q U O�0oo0000000 wUTo000000000 p LL a w w U. O H~ U LL p o 0 0 0 0 o c o 0 0 n LL 0 OO U Z � T U C y 7 OO in OO OOo 00 T Co Cl T U i � J Z Q O O O Ln N 0 0 0 0 Y7 y (O O N t0 (O N O f0 � O Z 0 O M Lo O O O co O O _ couo In II c m F- F I CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BY DATE CHECKED BV DATE SHEET .�� OF It T'-- I � i' Y 1 L •. _ ' � .; i :., ._� .ram ! i � + �_. � I__} r—,� �: ._' �. } i ! I { 1;A._1t-� •, T 1 _l . _ t [y t a i `c` 'tt Al i >C 14 _`� ; ill ' ,t✓ F - � '1 t h t • � , • li- § '-' i I V''t tf- s'" ' 'k * � r - � i..,.. d ... .. . . �- �'1--� �i _ ;..+ if r. S J 1 Y I L1 i-�� 4 .. ... ..y«. . .-.,I..i+ ✓ s ni. i+�+'rya•Y.�." A... .' .,,. s ..i._. ...... , k i t 1 - 1 ►J tj N The Engineering C} I 74&CLIENT PROJECT CALCULATIONS FOR L -j- I I I I I I I I �7 I F.rol:K14'r MADE BY- DATE CHECKED BY- DATE . SHEET z OF -7 + t-� T —T 1-4 f -4 4-.. -1 L j. 1-4 4 - -�4 4 1, fl IT 4 n -T t J- r y IThe Engineering Co 1 1 1 1 1 W tua �LL .0 *a0 N N1 th ON to Oto to UO f, N �p m (C U Co U v 4 M M M N N 0 0 Na 0 W m Vaornv,mNrnn U aU��Of W <ONNa664"i to to to to to to to to to to to <O t0 tD tD t0 <O 10 10 t0 <O <O l0 n►�f�f�hf�hf�hhP� v 7 Q 00 dtninOtnNNtn00Ln'n N N N N N N N N N N N W U a LL •- v W ly LL Q U p> o 0 0 0 0 0 0 0 Cl 0 0 wad���.-ter a LL v W w LL 4' 0 ju U N LL to to to to to to to to N to to Oa LL co to to co co tc to rD to to fo O LL C O C G O O O C G C 00 U Z c to v ootnOpaa40mmtn Mffi N, O N N � 0 M� 0 nnt0 40 to IWVN.-e-� O O C J N Z Q t7 O000It) C> n000tn y t0 T n N tD O (O N Of to W .k to V M M eM (V N .- 0 0 T �7 C � O ZO E O y Z t j N rj p 0 th to O O .- O O N W (n II F Q u m h E 1 r 1 I [] CLIENT. CALCULATIONS FOR JOB NO MADE BY DATE CHECKED BY DATE SHEET aa- OF { . A.. 1 a 1T r.HS- t 1 t td rt 1 1 Y j 1 YL 1-1 _t'.S T 1 i 4. T .f•.•, .� ;� .tM •ate--n� I .r ,�.-� �.� r.y. � v .... ..... ,.. 1_i } Hl. >• t i I t r i l 1 111 1 } t t— -,/ r � _ r .I T � L..� {-7 �j'.. � 1r��f 1 _ r— .� . r.. 1-r — r f , T " ..n• r •a-6.L ��r W-', +-S ,...,. 'l.d..L i t �yt, i.+.. �T L.. .'t •.t ,.. ' .s.. � 141 } p r -i Y � I ' { , 1 4 . i The Engineering Co. CLIENT - JOB NO. PROJECT CALCULATIONS FOR ' - MADE BY DATE CHECKED gBY— � DATE SHEET OF -+77 h 1 —r T 't —r Y �, —1 +- i—�+ r ;_,... i t..' .•r-�'.l Y.1T a.+ .�- _ - -1 t. - r ,�—T t—r ...�..l..I ���.� i ., 1 f_r -•1. �.1 �� ty. .� .._T �. .;_ 1_y � . $ .r- � i r t -j-•- F �-- -i ` r + , � }—Y- ..7 . 1 i. }. (Yj_��{ i i j �, 1 !.. j x i , A --I y� J--I_ -a 1 r f s i� � �r r• .�. • _" r'r"r d`4-7"q^ j"� i ^t t 1 t + i i k — w, , r. i s . w q 1 FT!'- f r i_� L � t-a—i_ .._ 1—Y- 1_ j. r .+ \ _�. ��� � �\ 1 �I '� 4.. � . r i. t .a•..j�. i {, . _ +'1__ ' � a �' �' .i..i�.: 1-- i..�.�{_^-i—i"i 1. '' _y .�..i ' � �•av� -•�►Y� ' i i.. �.p.,• � i ..t�l I ' �.... -1 A_ 11 111 t i 4 .t_ j T. ' _.:.u3—�i'. i I I ��-.r..-ii + �..T—a 2--',r- .�...,I.��.�. �� iy._, -- . 'i r-- j + ' Ls 1-6- L t bbb I j it i � f �- • r The Engineering G 1 CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BV DATE CHECKED BY- - DATE - SHEET OF - 1 Y y�./�. :. •. I t.....'1R t �e�l e.�j�� F (i t / '�j`` }� J t . 3 t T cad :r h wA:. / bz�cf r 5 , - , - ` Au +� F I ■ __II e ' y Tr `T ; �, ' ���rPm(�r :��si�► �� �'o�i� �r�J2: �wr'/� ,�j >~ 1 VIC- %S y�i' ♦ 1 v c7lart-., y 0mw iiit,� y'Ul�ar� ��Ys � ssd�n 1 4004 . nsr���r V �,s ' Yd. The Engineering G I CLIENT PROUE( CALCULATIONS FOR JOB NO. MADE BY_ DATE CHECKED BY- DATE SHEET OF J, r+-j 1-7- A A x4- v /17 - 1--- -4 'O)W L 1. �'% kv y- p Al A7 c-P 74- The Engineering Co I 1 CLIENT PROJECT CALCULATIONS FOR MADE BY DATEI CHECKED BY DATE _ 1 _ ..-- - 'ALI t I 74- i I I l t 1� 7 I ('/" ✓ 1tva f I 1 1 v� 1 ^JJjj 1 L [1 1 1 11 1 i 1 Y I t �N ¢. Lj_ t , Q JOB NO. 4, • 7 h 1. , -, .. Y_- . - ..,._.b.... „, . .. .. .. � .� .. :.-�' ' .>:.�. .I•AI� ,...ierii q .ter_.... i.-r-I. 'i'..y.W «,�.-.�...?... - ».. t 1 • .y. : / tee`. � ,- ._ _ _ ( �,.i .n,. f.G.. �..1. +r (...•. S 1 Dr. 0/� ��.., I � _ F_ y G1 /a o 9z))( 0. o7Yj ood) z - Q z /,�/ cam. ( No �000 , O/ 3 1 The Engineering Cc . 46CLIENT PROJECT CALCULATIONS FOR Ro7I:Ci1 ' MADE BY —DATE CHECKED BY-_ - DATE 640-0 nn , R t-,_ ffY��7 r � i y t} fa , 4 I � ' , 1 1151, a (9. C�s- lU o 4oroo,d ) ;V1 SHEET—A6�SOF 5 The Engineering Cr I CLIENT— PROJECT - MADE BY r _-t4 is4- 4­ -Z J Vj TIL— I JOB NO. CALCULATIONS FOR DATE CHECKED BY- DATE SHEET L�ls PF I- T 4,r-L L 4 "-4 4-j _j S 19� -4� I _'j L j if r as 1 � ' J . . _.. � / -, ... � +; � �.s 2lp � 7 as g Za tT_ .4 X �� coo I col N ol- 1%2rdli llk oO�z- f� o -b, , �4, 14.,l A 4 — 511JA4 Mal Thc Engineering Cr 1 1 1 1 1 4.2.3 Major Storms The determination of the allowable street flow due to the major storm shall be based on the following criteria: • Theoretical capacity based on allowable depth and inundated area. • Reduced allowable flow due to velocity conditions. 4.2.3.1 Street Encroachment Table 4-2 sets forth the allowable street inundation for the major storm runoff. Table 4-2 MAJOR STORM - STREET RUNOFF ENCROACHMENT Street Classification Maximum Encroachment Local(includes places, Residential dwellings, public, alleys,'marginal commercial, and industrial buildings access 6 collector) shall not be inundated at the ground line unless buildings are flood proofed. The depth of water over the crown shall not exceed 6 inches. Arterial Major Arterial May 1984 Revised January 1997 Residential dwellings, public, commercial and industrial buildings shall not be inundated at the ground line unless buildings are flood proofed. Depth of water at the street crown shall not exceed 6 inches to allow operation of emergency vehicles. The depth of water over the gutter flowline shall not exceed 18 inches. In some cases, the 18 inch depth over the gutter flowline is more restrictive than the 6 inch depth over the street crown. For these conditions, the most restrictive of the two criterial shall govern. Residential dwellings, public, commercial and industrial buildings shall not be inundated at the ground line unless buildings are flood proofed. The street flow shall not overtop the crown to allow operation of emergency vehicles. The depth of water over the gutter flowline shall not exceed 18 inches. In some cases, the 18 inch depth over the gutter flowline is more restrictive than no overtopping of the crown. For these conditions, the most restrictive of the two criteria shall govern. Design criteria 4-5 a/ 4.2.3.2 Theoretical Capacity Manning's equation shall be used to calculate the theoretical runoff - carrying capacity based on the •allowable street inundation. The equation will be as follows: 1.49 2"v: ' Q=—R S A n Where Q = Capacity, cfs ' n = Roughness Coefficient R = Hydraulic Radius, A/P S = Slope, feet/feet A = Area, feet Appropriate "n" values can be found in Table 4-3. Any values not listed should be located in the Geological Survey Water Supply Paper, 1849. ' Table 4-3 iANNING'S ROUGHNESS COEFFICIENTS FOR STREET SURFACES Surface Roughness Coefficient Guttek & Street. . . 0.016 Dry Rubble . . . . . . . . . . . . . . . . . 0.035 ' Mowed Kentucky Bluegrass . . . . . . . . 0.035 Rough Stony Field w/Weeds. . 0.040 Sidewalk & Driveway. . 0.016 4.2.3.3 Allowable Gutter Flow The theoretical capacity must be reduced in order to obtain the actual flow rate allowable. The procedures and criteria are identical to ' those found in Section 4.2.2.3 "Allowable Gutter Flow", which is finding a reduction factor from the chart included in that section. Any street ponding of storm water shall be controlled by the same criteria set forth in Table 4-2. 4.2.3.4 Cross Street Flow ' Table 4-4 is the criteria to be'used for allowable cross street flow. Both the theoretical and allowable cross street flow shall be determined by the methods described in the preceding sections, depending upon which design storm is being considered. However, the gutter slope variable should be replaced with the cross street water surface slope. Table 4-4 ' ALLOWABLE CROSS STREET FLOW Street Classification Initial Design Runoff Major Design Runoff. ' Local (includes places, 6 inch depth in 18 inch depth gutter alleys, marginal crosspan above flowline access) ' Collector Where crosspans 18 inch depth allowed, depth of flow above gutter shall not exceed flowline Arterial crown None 6 inches or less over crown Major Arterial None None May 1984 Design Criteria Revised January 1997 4-6. I rC I I I �o d 0 Aoe CLIENT PROJECT- CALCULATIONS FOR MADE BY- DATE CHECKED BY DATE FOA NO, SHEET-2-Y�F . no OA— \ yw � / — lall% 4 7 epp - i k -, (I �lh P4 4v / VY1,Q, AAVS 1� It.41"Qd, G s e, The Engineering Cc OA— \ yw � / — lall% 4 7 epp - i k -, (I �lh P4 4v / VY1,Q, AAVS 1� It.41"Qd, G s e, The Engineering Cc FI ' CLIENT_ PROJECT i MADE BY 1 1 �r T LY 1 1 I NO. CALCULATIONS FOR DATE CHECKED BY DATE SHEET OF t ILL i 4 --y141 a t Al ; I T T T 1 1 1 i-r --F A . 1 A��n�nd*1411 0;40 2$ 4m +&tAe. o - �m-rJo, The Engineering Cu ' CLIENT_ PROJECT ' MADE BY 1 1 JOB NO. CALCULATIONS FOR DATE- CHECKED BY DATE SHEET-e!97.SGOF t i Y i1.. 1 L1 T i ..-T r r 1 i 1 n t + 1 The Engineering Co 1 1 1 1 1 1 CLIENT JOB NO. PROJECT CALCULATIONS FOR �, MADE BY DATE CHECKED BY- DATE SHEET_ /QF { , 1 ,do ;olo.��Y'! e lowa 7.r q t V0, 1' dt M• -i- I - , T `-r " ? i"t , rt *tL'- P 1 Y r J + ...T , : V _r T i 1 n . .4-...• a .. 1...,. ,mot-V�j+a.{ •^h� 4"p' "F' .'�°'+�� �w, �-�,.,re.t- 7f �t , 1t-.. i r ,•-�i..� h ! �.:.�, ww., i. e I , 1 1 r ' - ,.4. F..•. i 1•�w, +.l.. ti .. _-.:.«t. .c�..�i..Jr.i-.} - .y.� -. .. 1 �^".` '�' I `t"..�( /+ e44 nw Gta/C�r� Ib��e. oab a 1:.--0 1713 _n tO b d �74 z A/0 � n�2 ^ f The Engineering C, I 1 CLIENT PROJECT CALCULATIONS FOR 1 1 1 1 1 1 1 :Cs MADE BY DATE CHECKED BY DATE SHEET OF 14 d-c n� / 00 14 Cry � �dk h ,:!� 1 6.ps 1 I'hr Engineering ' CLIENT_ PROJECT_ ' MADE BY— T-r tJ. F h ley i • �. yy I I � i i—+ I � I rinl.�n:✓ 1 ` J D.PYp V- I JOB NO. CALCULATIONS FOR DATE CHECKED BY DATE SHEET 30 OF I i L- c�ar►RD alY�� _�, 1r _ lj Iti.—Ifl, )--I'- T-' f x 1� I o' 0� & ) -►-(�Zx 0, cis The Engineering Co CLIENT_ PROJECT MADE BY 7 u DATE CHECKED BY. CALCULATIONS FOR JOB NO. SHEET c I OF a i-.. .� 4-4 (...eq—tom'. N..., � i .c.u^ .:.. M r ... ._.f ^t tom.. d ..,L.._.✓. .. }..S...J i .. .. �'.,57.....eL �.�...�..�.�p � .1...�...1 r 't..�..�. I 1 r # 7 J, - i �. �-� �� _ f • IIVAA/ VVV��_ ' 4 4- Coo ' "-DrL � ('.� (iV � lcih- ) o OAJIyi I S 4o Ws I n .4,ps, 6v rkl ZjAlvr 1 n / i' f � GY}�b i /' �• � �x �!('1 /%�17, �1y �/��i� �✓Y�` l''� e En cc Cf• 13 2. 9000 8000 7000 6000 5000 4000 3000 FZ9m@ e 1000 900 600 C 700 600 KJ s00 O 400 ' Q 300 Ir 200 100 90 60 70 60 �10 40 30 20 E From BPR 2.0 Ga T EQUATION: Q • O.GG(A) s' j" 11 IS ROUGHNESS COEFFICIENT IN NANNING .10 FOSYULA AFIAOFAIATIE TO MATERIAL IN SOT TOM OF CHANNEL DOU 1.0 ( IS RECIIRO"L OF CAOSS SLOPE .08 "FEA[NLE: $uC .O7 PAGE .50. EQUATION UAI .80 .06 zad .70 EXAMPLE ISE[ CASHED u4951 GIVEN. s • 0.03 10 U. .05 60 Cl) TO \ t ' EA 00 50 �� .04 IT .OE1 � _ E_ .50 .E/0.It -! V 70 w E- - 0.22 xo PING Q • 2.0 cps _ - - .03 .40 -__------ to Z _ Z s -.30 d ---- Q v> v x W INSTRUCTIONS U[ 1 J cr .07 w .OI I. CONNECT E/O RATIO WITH SLOPE IS) Q ,OS z AND CONNECT DISCHARSE 401 WITH = 03 z ,008 DEPTH IJI. TNF SE TWO LINES MUST U INTERSECT AT TURNING LINE to" N .02 -OO7 COMPLETE SOLUTION. Q .OI /\ V .006 [. FOR SHALLOW 1 T _ J LL .005 V-SHAPED CHANNEL AS SHOWN USE NOMOGRAPH O T WET. ( . .004 r w a f TO DRERYgE r G �; o .003 CISCHARi[ 01 IN a VA PORTION of cNAAM(L NAV ING VIOT..: D(TIRYIM( 0(PT. J 10. TOTAL OISCNARDE IN .002 ENTIRE f(CTION O THEN USE NOYOORAPN TO DETERMI.E 0. I. SECTION a FO. CC". A TO OETUY IN' OISCHAROE ( e IN COYIOfIT( S(CTIOM:- O POLLOM IMSTRUCTIOM 1 ) "' 7 .00P TO OST.14 DISC... GE III SECTIOM 0 AT ASSUMCO OEITH J; 001.1. O 100 SLOPE RATIO t1 ANO DEATH j THEM 01 • 0� .01 Figure 4-1 NONOGRAPH FOR FLOW IN TRIANGULAR GUTTERS (From U.S. Dept. of Commerce, Bureau of Public Roads, 1965) F- Z a U) .IO w a .08 w w .07 06 co OFL .05 W Cr_ .04 D U .03 Q ~ 02 a w 0 .01 MAY 1984 4-3 DESIGN CRITERIA 33 LL 1.0 .9 cls=0.6 F= 0.8 .8 u .3 .2 s=0.4% F=0.5 I I BELOW MINIMUM 4LLOWABLE I STREET GRADE .0 0 2 4 6 8 10 12 14 SLOPE OF GUTTER Figure 4-2 REDUCTION FACTOR FOR ALLOWABLE GUTTER CAPACITY Apply reduction factor for applicable slope to the theoretical gutter capacity to obtain allowable gutter capacity. (From: U.S. Dept. of Commerce, Bureau of Public Roads, 1965) MAY 1984 4-4 DESIGN CRITERIA I i 1 1 CLIENT_ PRQJEC1 MADE BY JOB NO. CALCULATIONS FOR DATE CHECKED BV DATE SHEET OF 1 The Engineering Co 11 CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BY— DATE CHECKED BY— DATE SHEET_LIS OF T-1 -4- llw J-; -:t, 2-1-1-4, —EL J r 44 4—tIt-t 14 L ! �- -: I -4- -4 T F-I t 4- 7 -577!j- 4. I t A. �-4 t -tTT--- 77 1 -177 IT TT P -4 t4 I j L A .LV -T L] 4 r A. �4-- -I-q' A IJ 4 4- t4 + -T A.. -d T" lap--1177 r :-7 L 7 ti A.V f- t -r J, I The Engineering Co CLIENT JOB NO. PROJECT CALCULATIONS FOR . MADE BY— DATE CHECKED BY DATE SHEET OF f � 1 _t � ! I..,� t T� I � C-7.�_T T � '..,r ;� � _T r ,"-� 1 f - _ _. y ..4_.. _ s y � � ! ! •�. _T" ' I r -«. -'�` i L 1 1 I_�'_1 t' a. ' A"1 I Z r/ ' ' �/ /"• I 'I �_�lj } t. _�1-�/�/i.. t I 1. A J r f , '� i _ ; 7 -� I i L' i 1 �i_ L r 1 �a i 1 -( t r--1� r i» } I-��-•{w-+ � - _ {..-s• J r i � a..f.., ��•d t r 1 J_y_...;. Ij _ , •%l 1/ .tl , '`11 I L . . } -1 r '�a�_1'C�.'.!� Y_� (-- ..{ 4/ • �• % - I� � �i X V V ' ✓ ' ` �\. OI V '. -IG��, � ��-�_ , 1- i 1.-. 4- - 4F (��i-T- "..y .,_ !. a t i -I. t 1•- I _i ji_Y,._. ' i-..;'.�...r.-1.,. ' ` 1+1 ✓t �H�l - I�y �� ~ 1 d �-* } 1 1 C..1. f-.4,..al ` •'i-- t-r t . 'i' . .{. r... r". >.... r. _r �.. .-i a_-.a_J..�_-+._ {_. ... ..r. .: 1. , 7 1 _ ..=.t 4- F.1 -rt - ��• I , 1 � �-{�/ ,-1 ,�T^JV i , t � - �..�. � ..1 * 1 r ,._1 t--i-"?-. "� . �_ _ 11 4.4-- •Q.1- � ,_r -147 '�.'� 6-.t..a.l._ r � �J7I//\/n�..n..J , �-'�'LA,..o-»v-,?••� �S5— t a� yo yn'�- .tt t I ` .. ii a �- �.a}.. 1_��lii-- �1 ...+- 'E .. Ti ,L.Tr J��./ _ ✓ _a S I y I i '' �f I _ -i- i.. t 7 ! • i �� r'..-1 --1 V 1 r � i ` _.. v - l/ f CP/J4 , a.-e t ^y •..1... ..w _• _ + 7 r , .�we.�.NsA•.;....Y. I .y_"L :7 .� .y 1 0 ..� d 1 `Y' .. j 1. �-�r .(4• SACy. 3�� � �o, o i;� � , , ._. IS ' The Engineering Co I [1 1 1 1 1 i 1 1 11 n 1 1 1 1 1 i 1 7�C CLIENT PROJECT CALCULATIONS FOR MADE BY NO. CHECKED BY DATE SHEET- nOF S'A yvn • --� , +� ` t, tA tK(1 ��^/'yam/'- f.-lri...r_1 ii S�!.'—r._���/; "'�'I. v. /�rL'G..r �'�(/✓FV/'t__ !' _ �� . r i /wf 04 l Ar_.r...y .;_* W , » V/` . .. wY Y ,y4.�w�p T N ..•r.Z-+�..a. f � � _ .� 4 .l_ r 1- J y , h ,.... 1� a• � ' r Vr_. .r � 5 t , -r i�I .�. h Y00T. r r ::Jn l�q �l 2 J�i� d �'C � �1�d , �� wit �(.°... t,✓!1 s. L 1 The Engineering C, rJ CLIENT JOB NO. ' PROJECT CALCULATIONS FOR MADE By— DATE CHECKED BY— DATE SHEET�F ! _ T oj-�.s.r�v.5s P® xo yard ,rr��?r ►01'�_ ten° I, .Ar�fi v cteb, u` G / . 1^', t �—� b c fi �.r d h ems•..' i - ! t � Y - The Engineering Co I 1 .CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BV DATE CHECKED BV DATE SHEET-� OF 1 ~ 1 1 rl ir _ 1 I i- k- i 1 } � t -� , i-` 1 1. 1 1 i. L:. a.� 1 ! .} 1' -i -( !'-I-. r 1 ; �..,. - 1 {. f.' fi r 1 r 1' ^f�A+.e. f 4-+-.8—,.�-.+N ' •,F_LY .A.� W(` ' �r•� '� � �. •� p$ q �.J Y .�4�u,Y... r} rl 1._ .� +_.' •, '. t. I y - I- I- i 1 T-�I r , I 1 i r ] j-4 1 l �--.t - I l i { -, I _I— }._l .. } 1 {f `'( T f l�_6 1. --Lt. L ...7 i I , i. -�—� (L' 1 -r_ f a L IL } .�. ♦. }.t. , r } `. _t_.. l /)� 1. -t' -r ( ! i t � j- .+. -•t 31-. � '-� , + t F , o _� 1 t �( j -}-; 49 1-l-4 1 I_. w a-.. -t-L-i ' ?y�'� �. we. - m^p l .,.-i. 1.,d,..4. �. ' r .L.#'^"Y"..i ` _ !. � l I...i. r y ` ...�.�.y..: 1'"' •M-1-"1' `Jt• { .��.} _ 1._ -... e.. i r a--1 h `'` t { I +- 1 • ' i-,}-«_ t,(�� _- i.. r .. ,._ I �j{, t Y y 1 ` ' . i t 1 1 1 Y 1. :- I _ I _ e yI1 _ y� L �IJi { i .-- 4 -}y G5� .... n i i -i ♦ I--� i ♦'. I I — _Y.. _ f • 1 , .:-.' .;—j .}._; ;—. ..t .�.rY..e....y..�. +-.�...}• ......,.� :.,•�. .y.Y '�`# rt +� h. Y M ...1,.,. a } I ... •�^, ,r..w'..Y J..y. ,... a-e!.^--s. f t+•. i 4r4f j a`I nit;t�y� a .,11 1 ?_ 2 1 i°T� i } I �1 i T x k t'�".'•i v^ 11 4.}., 1eL�v. h b .1 .' i # sr..� _l-.T..A.W .. r i..�,.u.+ �",a .. _. ... , 1 1 Oroa� 1 The Engineering G d- r iG S 1b F a Detention Calculations V �` E9 �i S ` i nx x AI � Y G F ry 75 r� i CLIENT 1 PROJECT CALCULATIONS FOR 4-1 i 1 �44 i I• 1♦,Y. I 1 1 1 1 1 1 1 1 1 1 MADE BV DATE CHECKED BV DATE JOB NO f f i 4 •- � f - .� I �� � L• l f-�-F 1 _- n. 1 "- i Y-.F.� ✓..'Y. � b `. I.. _ • .Y- V V.... �Y.Y ,� Y `✓(�--��r , �.,..✓ I ///��/�/�/'��/��. ��.r...j AI 1 r ♦ tja SHEET OF t~ j—'• t—i— T V 1 �,4.. y'_ T s , r i '_ •p i f �, -"t' ram- �_f;--+ I.. _ �...a_� -�- r" t ' T 7. r T il. f. 1 .. ♦ 1 �. j i- L .fA *-� r �-,- �, �� -�. ram.•-� f, � / � - _ _ � r i^ — . r l L s 1 r I � / �� ► � �� �� vr_�- : i Off'=; dr u %rim°. Ohm y no o(),ash /oa The Engineering Co u I 1 1 1 1 [] 1 1 1� i 1 1 1 CLIENT PROJECT CALCULATIONS FOR MADE BY— DATE CHECKED BV DATE_ RX-411S - i t 1 p L t r r r riIII Ti T fit- i —r114 i qq 1 j t 1-.t_4 y, r w ��.,1—'� ;" r Y. f.1�..L j.�.n.}�.� �„l y.y. , ,1�,�, r..r..i 2 8 %,.p �. i-:•-1.� .«.w. � c...:.�. � �O�+ r� rr i- lq ' .w.1 a.-S� .w...1..« 4 F.v a{. ' •' r t..l. 7 1 t-4r �_ .a-1-J..+ Y2_� .p i t,(t �—-+----. 1. :Vl` ... i : it_Y'.._ !— 1+_ rt- iC -•- .__ ., r--. "i i 'e 1 r- . .....u. � ...�.,... 1" SHEET!h OF 4--j _ 1 L f 1TI—IT! AJ .-.r'—; --- V " v a !i(� �� ...� �/j L�Q 6 i��+C/ —1—— ixnw.iK` y { i 1 The Engineering Co CLIENT_ ' PROJECT MADEBY CALCULATIONS FOR DATE CHECKED BV DATE bpi �— OF j I 1 s I-;4,0 ?-�''9+2: �SrR�q� 1/b/✓rr�.t, cr, :ba9s#�h�4^}t 1 6441 /vv f 'Y T ry�."�',y(..� �.�= �J'�j iba1 /'1 tl 9 r r^, A I r, The Engineering Co 1 1 1 1 1 1 1 W Q . (n 0 0 0 0 0 0 0 0 0 T NM�mNat V O � y�OMOOTNNCD U C nOaTN etO _ T T N It C0O T O T T W 2 m =) E 0 rTMMOhoD �s�pv � Q U N M N O w O (0 o r- —z NNCO T r, 0; N j UvOTTT NNNN CO U U Q NONb W LO LO 0 w to ew MCowwwwwo rQ c M M M M M M M M M F t OOOOOOOOtt) Z I N T O N N oD 01 � O W t: W N T T T fLZ N N LO N LO M M LO LO U N N N N N N N N N T T T T T T T r T U wwowmmm(om 0 0 0 0 0 0 0 0 0 (n 0 Cl 0 0 o 0 C O O O O O O O O o 0000Ntb o0�N tp W M (O 01 �- T (9 N lh W H y Z 7 Mf 0 4Y o 0 0 0 0 0 Q C T T N CO)(O 0> (N CO m W 2 J 0 .r W NCO�ATCO W lIY W O Co 00)hM�(p TP U N O N O T W 9 T o0 m Nb CD n CO CD NNE W w W Q O O O O O e Oe}} 0 0 NO CO U T T N eF CD CD N O W J N O E 0 CD (n 0 W ��CO �A TODT^ O tAn iQ U W CO MBA M I'O1�� Hw CNN P, CO 4D cm wCf)Ln U v � U U Q Q N LLNf � M M M co M M M M co LL U T T T T T T T T T Q v V C M 'm LN,NN0WaZ,O (0 0 W I-: i-: (U L6 4 N T T T z a 0 « (F N N N N N N N N N cc N N N N N N N N N mU T T V-: �. cu U �a� ��a�GGoa�coo o00000000 cc o o 0 0 0 0 0 (O pC00CD Cl 000000� E 8c)0 ON CO(O MtNO W (D TTMinrT H y Z d ��o(f10000Nco Q C T T N 0) co 0)T T m � CLIENT_ ' PROJECT BY MADE 4 1 I , F1 } I i t 1 i I. 11 I CALCULATIONS FOR DATE CHECKED BV DATE SHEET OF � 17 _,.fir + "- �I -f-t-r 4 + J ' The Engineering Co I CLIENT 1 PROJECT CALCULATIONS FOR t7.*�+ j 7�1 11 Y 1 1 1 1 1 MADE BV DATE CHECKED BY DATE JOB NO. SHEET OF 1 1 �r 0.7 e �C� PS) 3-7 Q10,0 9 r 1 The Engineering Cu 7 I LJ I I [1 1 �l CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BY DATE CHECKED BV DATE SHEET OF J r r -'_ ,. i. , .� � /Y'V"VC �..(Ir • li(/✓ �• f t/� d� ' L /("/�� �� 1 '� � �� �t 071 np �95lY7UL°�C°Qd z r�"PtSb 'or;��QS � t t a tpe Aleraz_ Aols cc J The Engineering Co 47 w 2 D J 0 .r U cm co W r- M O0 CmLn to N co .. 'a w w w co o 0 0 0 0 0 0 0 0 Ln N M S S N v V O w vjONO.-N N 00 U U0'91�D�C-4 W � n CO W J O E w >vNn MwOn 00o W w M 0 W M N N O >Q UNMtn OaD 000�n NNNNM U v U Q W � Ln Ln tn o W in o Ln w Qr vM M M M 6 6 M M M r .. = 0 0 0 0 0 0 0 0 N z � N , O N N c0 T K O W vP.:ncocn4N1:�� F- Z &0 W in cn cn cn 0 to cn N N N N N N N N N U wcocowwwwoo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 c Cl o 0 0 0 0 0 0 0 O OOON 00 wIt NO w N Cl) m 0I M N n Z d OtnOOOOOO QCLO r- N M 0O N 00 in 2 w J O «^ � N OD YY •- 00 W <0 �n W O ^-0Q� rnncnv�m�n U_NONO�ef Mr-f0 0 dNtn mn 00 OD N N`7 a w w w U Cl O O O t0 N of OD p titONO��MfO� CV v Oo Oo � N w J O E N >Q U0) co Co Lo �a U ` U U QQ {JJ ` M M M M M CM M CM 04 Q N M L N� O N N co CD v O m Z � w vnnco u'i'iN��� Z a 0 .. N N N N N N N N N PD U . cc 0 U CC! cgmmmcoDDo o 0 0 0 0 0 0 0 0 o 10 0 0 Cl 0 0 0 Uo O o 0 0 0 0 0 0 0 �E Mf0m MLoNQ w N .-r-tnnr. Z m 7OOtn OOOONw C � � N M CO 0) m I CLIENT PROJECT MADE BY- DATE CHECKED BY- 1-4 i--T ji 4"i LL4 t j j T CALCULATIONS FOR J, 14 .T 1� T 4 t L I -4 t Nr I I I I SHEET 6-. OF r j- t f-t A-L 4- .4 rl 7 Q,p-cl� /vIo ',7 V-Ws LIM IThe Engineering Co Erosion Control CLIENT— PROJECT — MADE BY— 'T- -T- �44 t I I 11 I I JOB NO CALCULATIONS FOR DATE CHECKED BY— DATE SHEET OF --7- ­71- Tr -i -4- 4 j 4-t-4-1 I - 4_� -t I J Z� T� t 4 4- ._4 j vj 4 , L T em -4-1 Tj v• I The Engineering Co I I "TE C I I H - L T T- 7t 77 7. "i L4 44 CLIENT, CALCULATIONS FOR IOB NO. MADE BY- DATE CHECKED BY- DATE SHEET OF L7,T­ T TA 717'i T ITT t. T IF V (.n3 ­1 7- � , , : �2j of :. ;t ; � % 3 ; ` , as s� './l %ins 4+, t J/7 r Lt L lk 55th V 4 ot. 11/ 0 L I I I IThe Engineering Co 1 CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BV DATE CHECKED BV DATE 1 I SHEET OF i 1 ♦_. :L r ' l d -OVS'J r� ' The Engineering Cc 4- 1 RAINFALL PERFORMANCE STANDARD EVALUATION 1 1 LL 1 1 1 1 1 [] 1] 1 11 1 1 i PROJECT: Arn��n �� n7 /d /1 STANDARD FORM A COMPLETED BY: ���.,ry /C � DATE: )=&jl R12 DEVELOPED SUBBAgIN ERODIBILITY ZONE Asb (ac) Lsb (ft) Ssb M Lb (feet) Sb M PS M � 38S 7ss c0q3. �. oa) �RIc 1G�{'iahs r Ste, ��s 1 MARCH 1991 8.14 DESIGN CRITERIA I CLIENT JOB NO. PROJECT CALCULATIONS FOR t� MADE BV DATE CHECKED BV DATE SHEET y OF � , -1' I � r-d r t t -j-. J � � h ♦ - i I _u 1- � j ! L T— r :`L-� 11 t,;L1-r ifrpY� ►I�!V /eve[. i e�—` , a ,�� �, 5 , �/ 1 f i f��� � y 1.. 1 iA f � t T i T G -=r�r�'1 �41%✓i/�� .: , 1✓ �a� i .` 1 b.�%r� ttr�rl' } hl r - tfiA �t -1 t t?�rr+ � r T Y tT'f i 1 � - r� �J� t t- � �• I I� 1 r-i I. .j_. / _. t ^- � . ..I }.� �O.Or ' 1 T} 1 ._ 'i{ '�i ..�._� �'e T 1 iF ",."e"a"'i / /Y �dD 1 ,... o �-.-P'-o- �`A"'�^' .�.,+^f- r 7 ,�,I-"'--i•"7'+'-�..'�-S^-r �.,4�.. 1 ..,.. _ t .> .. �o. 5.- j.,� •�. tr44.r, t yi L ( all ' I ` �� J j( � t ' � Y a I r � { . _ + f -. i r + .. ( a � •i - 1 , IT 1' zJ oz �1 i .l..i �'.70. -: °- `�.. %,`'fir a?• �" j r x +ro��� ..t �j Ov i 1 1 1 The Engineering Ct H 11 Fl L I I [1 I I I I I 11 CLIENT JOB NO. PROJECT CALCULATIONS FOR MADE BY- DATE CHECKED BY DATE T 4 )1 Cli/-.rl,�. �. .� .4- . ? SHEET OF , + t .i. + + 0 �nrr1�lJ�-si�ev�ra,���1�'� (- tAl At- i .. +�',a�, n � . �►: �'� b, ,����-s Cep-,ehs��� = �� -� �.� (�I�vidvJ/y �srk�r o� �ri..v�oa' S.) �P n�� r'n r'r� Vn �.'i s lv►' h;aaE _ �' � 7 I The Engineering G 1 1 1 1 EFFECTIVENESS CALCULATIONS PROJECT: �1/J` �ji�j ZO 1�%i /�4.� �pASTANDARD FORM B COMPLETED BY: pj I ti/Y� O % �i/�-Ci , O' /F., DATE: Erosion Control C-Factor P-Factor Method Value Value Comment S!r"ti/ k o. AV -se hA►-) bldgc. (0,©J- lI�o0 1 op, 919V1-c oW SM0dp1'hI'm 12 MAJOR BASIN PS ($) SUB BASIN AREA (Ac) CAL ULATIONS ' Aved P , Q. o r( Gj��ssR� G rea3 C0.7¢ x Aco) = d s�'c�,, bads barr�PrL = u 8a (40 L9 Ve �g MARCH 1991 8-15 DESIGN CRITERIA 1 1 1 1 1 1 1 1 1 1 1 1 1 i 1 i 1 1 1 EFFECTIVENESS CALCULATIONS PROJECT: � �y STANDARD FORM B ry 1 11/�0� �. �" r COMPLETED BY: I � DATE: �6 9 Erosion Control C-Factor P-Factor Method Value Value Comment MAJOR PS SUB AREA BASIN ($) BASIN (Ac) CALCULATIONS --w• 74) 93 % Z/ w d - fc�m v-. �Oopvf Pn-A-r C V.37x d•ol� _.Oc7d d.riv-s • (� n 4 s s ,oc( G veo s (0 z7 �. v�►�,5 � �-0d Ay100s (�, 07 o C� 0037 7 fi 0, a, 0,J¢-, I st�cwo ���� ba rrcp✓ _ SQ Sr Rorw , - 01�Sd MARCH 1991 8.15 DESIGN CRITERIA 7 Ir X. ml Ll Ll 1 l- J L t CLIENT MADE BY JOB NO CALCULATIONS FOR DATE CHECKED BV DATE SHEET 2 OF t jy... i.A r- al 1—� �.-./J � -7 �Y./( ;_,21. \ -\— �/t/� / i 3. `8=S 1. + ''•/ � �' � ` � 1 ti_ _ t-, r t+ I r { i i 1 i I�t ✓ 1 -� ;- - - ice- A f !'j` 9 ! 11�' t? •__F_ ,! �•. t� �-_Y 1 _•. S - ; w' t- 1 (/ _ I t •..... i 7r' 1 I i 0 I 1- ' The Engineering G i o. CONSTRUCTION SEQUENCE ' PROJECT: GYL//JjAy/�n'y�/ �Z4, 0'.- STANDARD FORM C SEQUENCE FOR 19 .(� ONLY COMPLETED BY: �S1G�L /G I /tea DATE: ' Indicate by use of a bar line or Symbols when erosion control measures will be installed. Major modifications to an approved schedule may require submitting a new schedule for ' approval by the City Engineer. Q YEAR q9 V. 19'/g MONTH m��Llm� (�TI//�'.��j�l��F+Y�I� �') WY1,YV►'1�/����I�� . OVERLOTLL GRADIU02L ' WI EROS ON Soil Roughenin Perimeter B ier Additions Barriers ' Vegeta ve Methods Soi Sealant '9ther RAINFALL EROSION CONTROL STRUCTURAL: Sediment Trap/Basin Inlet Filters Straw Barriers ' Silt Fence Barriers Sand Bags ' Bare Soil Preparation Contour Furrows Terracing Asphalt/Concrete Pavingother ' VEGETATIVE: Permanent Seed Planting 1 C�O✓� L�SG�/�� 1 Mulching/Sealant Temporary Seed Planting ' Sod Installation Nettings/Mate/Blankets Other INSTALLED BY V(/ jI ���G�/ , MAINTAINED BY 'STRUCTURES: VEGETATION/MULCHING CONTRACTOR -I'� E �� rrr r n e d. ' DATE SUBMITTED APPROVED BY CITY OF FORT COLLINS ON ' MARCH 1991 8-16 DESIGN CRITERIA I P�N I i ----NI, ca + to IIW Ija 110 r — I �1-nR-RRrtLr nn--nnrL`� I //'�11IIDL__DD J1L__1JJJ_ a `fir-"�--A r--316--711 1 I. -alr-0�-��� 1 �F I' I ?I I I �IIF Cal -� YI I L = III Il Q d 1 b I 1 r I L _ j _J I I I I 1 i OFFSITE BASIN II 1 � I A=10.25ac 1 C=0.20 -- I 1 I n TOFF-SITEBASINIII A=3.41ac -. C=0.20 �Tr--RR1- I 1 T (lluliIllLL_lll_LID-111—t11.t_Q_.i v, lr�ijM—RR—inn-TRr'�R�1-T dil 46 IN-SITFJBASINII A= .65ac \� \ liI (A 30. II 1 ONS IN II ! A—. ac / 1 ,1 ir Ilk \ II \ POND / ` 11111 \ 11 ]IN 1 I _ 1 \ — to to ; \ it 1 \ I { \\ \ I y \ fc of IND I 1\ 5R I I F O 1 1 SaaN: Y= ID9' I 1 ! 1— ri 1' \ \\ el F 1 \ � I v „7 I / 1 sRHAER COUNTY DETENTION CENTER I EXHIBIT B FORT COLLINS,COLARADO OFFSITE DRAINAGE BASINS G RR.RR ,IL plitIIGRRD w "inR ne. 1998 I The Engineering Company caeca BGIJt I'=t9D' ePIBOY® PROF. MI MRTCOFIJti 03L0RA00 1 1 1 IND I 1\ 5R I I F O 1 1 SaaN: Y= ID9' I 1 ! 1— ri 1' \ \\ el F 1 \ � I v „7 I / 1 sRHAER COUNTY DETENTION CENTER I EXHIBIT B FORT COLLINS,COLARADO OFFSITE DRAINAGE BASINS G RR.RR ,IL plitIIGRRD w "inR ne. 1998 I The Engineering Company caeca BGIJt I'=t9D' ePIBOY® PROF. MI MRTCOFIJti 03L0RA00 1 1 1 1 1 1 E < �IQ10, ED W �H �= �Afm DRB aas _ _ A-q35 \ III I (+�laft aftal „ -=-- 1 1 / M POEWDR.BASIN X /— J 1 -y A=Q92Aaa Amu 1111 Dzo t�� w LEGEND ♦ v- TIRE HYDRANT ` - TELEPHONE PEOISTAL •` , /P I HABIN D,O - PLNER UGHT POLE _ \mm, mm, C-0.6° I G - WATER VALVE \ \ `♦ � �— _ — _ — _ _ _ I • I _ - 1 =SANITARY SEVER MANHOLE = WATER METER PIT \\ BASIN I, ONSITB �,� JII • - SPRINKLER BOX \ ♦ \ I �' A=3.OA=& J I - - 9GN POST I BASINOFF \ ` C=O. L - CAMERA STAND A- �0 \ �\ ` \� f - •/ f - ELECTRIC VAULT Ct � i (• '���- -- - LIGHT HT POLE E \ ` I �� '\• • - _ „_ �_ _ _-_ JUNIPER BUSH DEDIDOUS TREE - _` -_i- - r aL�� !�'�-!/- . • PINE TREE C - -" - - --,� I I • = SMALL BUSH _ \ III m- BASIN BOUNDARY I I1I1 Iy °°"'"" °®°® ""° °"`""""IOU The Engineering Company DB&C[® Bcs ,-=100• .PPmvm PWI. RO. p)-0l1 I� FORT COLLTNS, COIARADO swjjl "AMkIllico MAP 1 1 1 1 EK I 70 4910 4910 PENCE POST (SPACING B'-0--\ 4905 t 0• WOS TOcJ WfC I n 3 •v0 FABRIC 4900 490^ ai (J'-0- WIDE ED A R[ry[E n Al JEQrox SILT T ry t5' 10 Q'YEAR ly - CROSS-SECTION DETAIL_ A G VALLEY PAN Mrl vA1B2r • AN SCALE. Iyj, 'k DIG It' WIDE t DEEP f=10VERi - s'1 TRENCH. BURY BOTTOM 1"-10' POR 1'-0. OF FABRIC, LAMP 20' ..: W PLACE. "LT Ill MTAL oasYale nder rzura ...c._,. .. -_. ._... _ ... •. _ Y . K. •e116L6 "wrisaa K✓ 3 p « 4 MIDPOINTDRIVE [seal eb V, v n �t ey - •-, —�- 11.1ALL 1sMET ro. — - i15 r, A=0AV2Acres .... Ammu% s uns.... she L IMIm•. ('=11fly "fir r� JE UEFF as - - � �-- MIDPOINT DRIVE A=2.36Acres v�NEm�Awa°x. - C=0.95 CONTRIBUTORY DRAIN GE �- yE BASIN FOR PROPOSED I DETENTION asr. e� �T \ Acres A=1.3 Acres g J Feel .. _ , o mirA mic`.�wu C, Fee ED - - OF a�a • a.._1 • OFF -SITE BASIN II A=10.25Acres _ —' 1 C=0.20 . •• .. • • 1 a:: - � See Exhibit"B" - \BN6 4 ENANMC[-v e. mesa, « w � few �im seelem less 7 Miami, �rm T Inlyll bit. Valley. la teral 4 has my . o.rt •n InD r•seoaa v ell, Or rest COLLINS sushiby w_ameoz_ OFF-SITEBASIN I 0" ON -SITE BASIN II A=3,4] A 341Acres xg cR - _ am mr`WN��wz°�ifOl A=6.65Acres Cali - \w L C=0.60 See Exhibit "BY ' KKKKE N.g x. oWwIK Nr x - TBL. ,••, . eau., WIm";la L E G E N D °" N The Line at Fa BK, Wol 'anal I'se , M 4. Re must be hatred m : ,4 War to n,Ie• a,ppr,pH,I, TEIEPHONE PEDESTAL •- w IF b%1m;o�Vhl •" land Alsturtyng GO TRANSFORMER ( (IyL�,�e All liner require none• mmuclevirrillyweans Lis Al xM am[{ trol nhe project wnw�oF n a •. ancon = WATER VALVE •poor © - SAN4ARY ,EWER Al F [ EVER R ro Nlfmar - Mex n . WATER METER P.- Up r-ram ON -SITE BASIN 1 rox an. Er noel •Orris • ae. na x 5"E �- A=3.95Aues svnr IW+ . ,`• ap•wnev. limitAll - sPR NKLER FDA AesA duo all ram the utm o'an a pence er time wl•a . scry PDs C=0.60 z_ = amiry,•r CAMERA STAND Mex[ « W 1xru�ex xuo TaK dLn Ixrsn .xlf ° u1 Nc [ (my) �p7W �• plc ping. ackpilinlg, ORION grading, uikept l'01 eair; ^11 `ta � •- ELECTRIC Vil TO WAIN A FORT Ixv_ . 5.0 ryL In , evigh,aa by 11 .Q NArxs W I'd = CLEANDUT • r ` protect_ E — E Oral .r by by land disc a Tully fill mom an Well a UGH POLE VR « (30) a 1 u .ceps cow ARRow 0«R. OIR'�) - �� am,(.. 2 q'(j'• Sarml U6 rye nna •a unm . / / n err•-• _ OECIOUDUs TREE • • 1 - m y nna re n g `c - —J Ad I'myy e penit =PINE 1REEan YNYmc S _ land 00 men.1W E a.r d.aanxnaM .b aMo. • ,. % s cd\ an pJAFTER ° a*M b• <•M1ml nee b1 •ntlry FnO .- xv.• «•2Y r At On Ce m nrrtf"A pi... ° =SPOT ELEVATION __ • cwn 1 ad ,• — „ _ q (nw e • arena mw•um •La b• � �- - _ _ �_ _ _ n E . Y _ he ^p• Ome as m ass ,won � - PROPOSED ASPHALT PAVING wr S _ •• 1 .b• I � r vAV ` on 8 r J andpert4H of . `:case.. m.e .•m rnaP�m�n �� `PENCE T«oA•K[ro°IxR� A _. — _ — _ — o ereieamnen - __ Tell INFLOW CURB, GUTTER \OUIr[T A No half Lin "CIm1O') In height. _ lw y.a - _. _ <WSSM.CWx - - J a*an a1vYall`M peb`eier n m` = 12. OUTFACE CURB. GULiER 2ESi _ pre IIIp WaA" "It •tai rlYrr 04KL MK a n I Y b• Talc aMng onlo SO°e • • START TO FOR WTr A YI[ - \ _ PROPOSED BUILDING E%PANSION reu Ie Cey Ordinance prom the In ping, a _ .1 anyr In weal n to Clity strikes DOli, team any l`br ewm•a = SILT FENCE r ,,ker RIM e�a��i�rrl�Irrnr d p ISM real hall immwlatelY enrweeter. '� e m• �] CQ = HAY BA(£ BARRIER � J Yfli•��r' e�i"�i��" o navyWe el As Indl.ldaal henHam•nsr. ---- A� - - - y1�K CaAS 0-nn. ° _ _ 1 .NWIM.M,m lit 0n•ra°mr�mL lee I NO1A:u TW4 UP DRAINAGE BASIN SUMMARY TAM y' ENISTIK BASIN ARG C i0C 010 0100 (ACRES) (MIN) ONPTE I S.Bs 0AG la.0 B 15.m ONS1TE 11 Las G.BS 51 .0 tar 2s.s «RBE 1.11 ns0 oss 14.3 1_ 56.0 TIMBERONE OVERTO 4.42 OVERALL rr.0 O.M SEA LAIDE 1M[ h«[f MWf YE MVI[WLED TO KI E FT 'e L -PAN Y1Y EF.FW [LE6 CCMTKCr 0100=wO o E ng TO Krtxrox roxB ay REO'0 nORAOE vOWME - szs0 a G 2—!�D "EXHIBIT A" 5 1 1 ' do' DRAINAGE BASIN BOUNDARIES H e DU" DID°�""® ""P °"" FEB. '°°° The Engineering Company LARIMER CO. DETENTION CENTER Ma® DRAINAGE PLAN &EROSION CONTROLsCAiJS 5 .4U• APFWD PRO. NO.9r-Ur2 EXPANSION FOR E ('OLLINS, COLORADO C OFF -SITE BASIN ll A— 10 21dc C=0.20 1 ,OFF -SITE BASIN 11 A-3.41 ac C=0.20 L\— i 0 0 - I IR. POINT DRIVE A=0.92ac C=0.95 111 \ 4 ON -SITE BASIN II A=�.65ac C=n.20 -' \ ,' P[1ND MIDPOINT DRIVE A=2.36ac �I ON -SITE BASIN 11 A=6.65ac ^ C=0.20---------------- - ------------------- 41 lI 1 111 i y WIND I DRAM R DBSIGRRD RRP "M FEB. 1929 CHR SCAN 1'=100' APPROCm PROI. RO.B]-O)1 The Engineering Company I LARIMER COUNTY DETENTION CENTER FORT OOLLJNs. COLORADO FORT COLLINS, COLORADO EXHIBIT B OFF -SITE DRAINAGE BASINS