Loading...
2009, 06-22 Permit App: 09000489 Grading*Acmes ems'' .#valley. Permit CI" 11703 E e Ave, Suite B-3 SpokaneValley, WA 99206 (509)688-0036 FAX: (509)688-0037 permitcenter@spokanevalley.org Community Development Grading Permit Application SITE ADDRESS /Sol S- arralitO'W- ASSESSORS PARCEL NO: :Property Owner !PERMIT NUMBER: CP/gal PERMIT FEE: ED BYLk_EY ❑ Rough/Clearing ❑ Full Gra t --• • 0EVP ❑ Underground Site In1A vegl‘WW3 t LEGAL DESCRIPTION: Excavation Contractor Name: THornA 5 SUW AJt Cwf rl��A1J lT Name: Manager: Address: Address: \5 p \ s . %tT1 City: State: Zip: C,VPLISS`-1 State: \t Zipgql\)- Phone: Fax: Phone: or= -\Th \5 %(o Fax: ,-' - b 3-2- Lic No. Exp Date: Contact-'Person"_s City Business Lic No: Name:pr�vt OW,xcfl. Engineer:! Phone: Company Name: S\r+vP ¶��rYctlCi Identify and describe the work and indicate the use: Cr2r\p"; 4. A (1> NOSOAPcu Q&O ,LA001 t 1\c 20 mo S\(3S _ 1t..\< lf.5C__ Vist glut& 1.00u.t)(r 0 04) A - Address: 01 t3°\ 3 . (03 City: Scro\C\at'.`. State: » Zip:0\c\--amr Phone: °N}tJ \; a� Fax: �� _ Lic No: 1Ct,.- n(p-p Soil Testing Firm: Company Name: Address: City: State: Zip: Phone: Fax: Estimated Excavation/Cut (Cu Yd): Estimated Embankment/Fill (Cu Yd): 10tyo` - Destination of Excavated Materials: Start Date: Estimated Completion Date: The permitee verifies, acknowledges and agrees by their signature that: 1) If this permit is for construction of or on a dwelling, the dwelling is/will be served by potable water. 2) Ownership of this City of Spokane Valley Permit inure to the property owner. 3) The signatory is the property owner or has permission to represent the property owner in this transaction. 4) All construction is to be done in full compliance with the City of Spokane Valley Development Code. Referenced codes are available for review at the City of Spokane Valley Permit Center. 5) This City of Spokane Valley Permit is not a permit or approval for any violation of federal, state or local laws, codes or ordinances. 6) Plans or additional information may be required to be submitted, and subsequently approved before this applicationbe processed. Signature: filflemm Date: Method of Payments (Faxed permit . p.lications will only be accepted with major bankcard) ❑Cash ❑ Check ❑ Mastercard ❑ VISA Bankcard #: Expires: Authorized Signature: Effective 10-28-07 Y4/6"7 VIN#: P:\Community Development\Building Division \Jodi -comm I\PCP\Grading Permit App.doc Page 1 of 1 . �fitlane esossesValley CITY OF SPOKANE VALLEY Community Devent Department Current Planning Ision 11707 East Sprague Avenue, Suite 106 Spokane Valley, WA 99206 Tel: (509) 921-1000 Fax: (509) 921-1008 pla n ni nq @spokaneval ley. orq For Staff Use Only) DATE SUBMITTE RECEIVED BY: FILE NO./NAME: CURRENT PLANNING FEE: ENGINEERING FEE: GOPEvn-tomf FLOODPLAIN DEVELOPMENT APPLICA1OQN o� catvrt FLOODPLAIN I — APPLICATION INFORMATION APPLICANT INFORMATION: APPLICANT: 17,3.0c -•A5 Svkr) i+.Srnn.35_5_0Aalr MAILING ADDRESS: \ <O \ S. A\.prJ - 0M CITY: S PON LP V a\ \4`1• STATE: W A ZIP:P1CY- 1 a -- PHONE: (HOMEMIORRI� q>7>- I4F) O (FAX) - (CELL) )- \'l • 1S p,(0 Please Cede Nom: IF APPLICANT IS NOT THE OWNER, INCLUDE WRITTEN OWNER AUTHORIZATION FROM THE LEGAL OWNER BELOW: OWNER INFORMATION: LEGAL OWNER: MAILING ADDRESS: CIT': Ok' PHONE (HOMEtwoRK) FAX) Please Circle STATE: ZIP: (CELL) PART II — SUBMITTAL REQUIREMENTS All Floodplain Permit Applications shall contain the following required information. If required and not submitted, the application will be retumed to the applicant as incomplete: Three (3) to -scale (minimum scale is 1 inch =-20 feet) site plans showing the nature, location, dimensions and elevation of the property and identifying the portion of the property located within the designated floodplain, existing or'proposed structures, location of proposed fill, location of storage of materials, and the location of drainage facilities. Proposed elevation in relation to mean sea level of the lowest floor including basement of all structures Proposed elevation in relation to mean sea level for any structure that has been flood -proofed. ❑ r non-residential construction only, certification by a registered professional engineer or architect that flood -proofing methods for any non-residential structures meet the flood -proofing trit tteria of Section 5.06.08.2 of the City's Floodplain Ordinance. ❑ en description if applicable describing the extent to which a watercourse will be altered or relocated as a result of the proposed development. No Rise Certification. Version 2 04-05 1 .l • • PART III - PROJECT INFORMATION PARCEL NUMBER(S) OF SITE: 1)5 -4-1 . 10 (71 STREET ADDRESS OF SITE (if any): 15 o i 5 DNA v Q.O - SIZE OF SUBJECT PROPERTY (square feet): EXISTING ZONE CLASSIFICATION(S): fr LIST PREVIOUS LAND USE ACTIONS INVOLVING THIS PROPERTY: ti 1 p Areas of Special Concern: Pursuant to Section 5.06.13 of the Spokane Valley Floodplain Ordinance, the following areas shall not be covered by impervious surfaces or fill unless an engineering study prepared by a professional engineering licensed in the State of Washington is completed that shows no impact to the ability of the floodplain to infiltrate, store and release floodwaters. Please check the box if your property is located in one of these areas: ❑ Chester Creek (downstream of Mohawk Road) 9 Saltese Creek (all areas of ponding and infiltration) ❑ Forker (south of the intersection of Forker Road and Progress Road) Central Park (west of Park Road) ❑ Glenrose (west of Carnahan Road and south of 8th Avenue) DESCRIPTION OF WORK: 1. Proposed Development Descriptions (check boxes that apply): 9 New Construction ❑ Alteration & Repair 0 Stream Alteration ❑ Manufactured/Modular Housing `NRoad, Culvert, Utilities Other - Describe: t .sb a,SCAP .- 9,53.. 2. Types of Construction (check boxes that apply): $j, New or Existing Residential: >V 1 > square feet ❑ Addition: square feet ❑ Accessory Structure: square feet ❑ Renovation: ❑ Interior 0 Exterior ❑ Temporary ❑ New Non -Residential ❑ Repair ❑ Utility Installation 9 Other - Describe: For Alterations, Additions or Improvements to an Existing Structure: If the cost of the proposed construction equals or exceeds SO percent of the market value substantial improvement requirements shall apply. Please answer the following questions: a. What is the estimated market value of the existing structure?: $ b. What is the estimated cost of the proposed construction?:$ Version 2 04-05 2 3. Filling & Grading Ilk boxes that apply): • Filling Grading I El Cubic Yards to be Removed: A l A - cubic yards ubic Yards to be Placed: 1 0 D cubic yards ASSOCIATED APPLICATIONS: This permit is being applied for in conjunction with one or more of the following (check boxes): ❑ Residential/Commercial Building Permit 4 Grading Permit ❑ Land Division Application ❑ Critical Areas Permit ❑ Shoreline Substantial Development Permit ❑ Other - Describe: PART IV - LEGAL OWNER SIGNATURE % (Signature of legal owner; representative as authorized by legal owner) I ///fr'it')GWai9m4.n mna 1St16/ 1 M*,\1 TO4i4(x (print name) SWEAR OR AFFIRM THAT THE AB RE ONSES ARE MA TRUTHFULLY AND TO THE BEST OF MY KNOWLEDGE. I FURTHER SWEAR OR A FIRM THAT I AM THE OWNER OF RECORD OF THE AREA PROPOSED FOR THE ABOVE IDENTIFIED LAND USE ACTION, OR, IF NOT THE OWNER, ATTACHED HEREWITH IS WRITTEN PERMISSION FROM THE OWNER AUTHORIZING MY ACTIONS ON HIS/HER BEHALF. It is hereby agreed that the City of Spokane Valley, its boards, officers, employees and agents shall be saved, indemnified and held harmless from all liabilities imposed by law by reason of injury to or death of any person(s) or damage to any property, including without limitation, liability for trespass, nuisuance or inverse condemnation, which may arise out of the work covered by this permit, and does agree to defend the City, its officers, employees and agents against any claim or action asserting such liability. Accepting this permit or starting any work hereunder shall constitute acceptance and agreement to all conditions and requirements of this permit and the ordinance and specifications authorizing issuance of such permit. STATE OF WASHINGTON COUNTY OF SPOKANE ) SUBSCRIBED AND SWORN to befo me this 3 ) ss: NOTARY (For Part IV above) . ;NOtAKIY: SFAL coskv. 11,4, VS Version'l°®1141S`"" day of M- (Date) ARY SIGNATURE Notary Public in and ��for theemStateaJof Washington lid-.—_ My appointment expires: 9 -9- II Residing at: 2009 3 c, •ART V — CONDITIONS OF APPFAIIAL FOR INTERNAL USE ONLY - TO BE COMPLETED BY THE CITY OF SPOKANE VALLEY Community Number 530-342 Panel Number. Flood Zone: Flood Zone Depth No.: Base Flood Elevation at Site: Required Top of the Bottom Floor Elevation: Required Top of the Next Higher Floor Elevation: If the structure is to be floodproofed, the required floodproofing elevation or method is: Elevation to which all attendant utilities including heating, ductwork, plumbing ventilation, electrical equipment and other service facilities will be installed or waterproofed: Elevation Certificate Required: 0 Yes 0 No Conditions of Approval: In addition to those listed above and below, please refer to attached conditions of approval if applicable. 1. Required Elevation of the "top of the next higher floor" shall be (AE) feet M.S.L. 2. Required Elevation of the "top of the next higher floor" shall be (AO) feet M.S.L 3. Required elevation of flood resistant materials, utilities, etc. or floodproofing construction for non- resdiential structures (the flood protected elevation) shall be feet M.S.L. 4. A "Building Under Construction" elevation certificate 0 shall ❑ shall not be completed and submitted to the City for review and approval prior to any vertical construction. A "Finished Construction" elevation certificate 0 shall 0 shall not be completed and submitted to the City for review and approval prior to human occupancy or final inspection of on-site building(s), whichever comes first. NO HUMAN OCCUPANCY OR FINAL INSPECTION SHALL BE GRANTED PRIOR TO THE SUBMITTAL AND APPROVAL OF THE "FINISHED CONSTRUCTION" CERTIFICATION. Version 2 04-05 4 PAS/1— DEPARTMENT SIGN -OFF 8ROVAL The following City Departments have reviewed and approved the floodplain permit application and have determined that conformance to applicable conditions of approval have occurred as required through the issuance of the permit: City of Spokane Valley Community Development Department: As the Floodplain Administrator or designee for the City of Spokane Valley, I certify the following has been reviewed and approved by me: ❑ The "No Rise" Certificate submitted to support the proposed floodplain development is approved. The "Building Under Construction" elevation certificate has been reviewed and approved: ❑ Structure elevated BFE + 1 foot ❑ Structure built with waterproofed materials to the flood protected elevation or more Floodplain Administrator or Designee Date The "Finished Construction" elevation certificate dated: 20 . It has been reviewed and: ❑ Returned for more information on 20 ❑ Approved on 20 Floodplain Administrator or Designee Date ❑ For unnumbered A Zones the Spokane Valley Building Inspector will verify that the first floor and all related mechanical and electrical equipment is two feet above adjoining flood area. Floodplain Administrator or Designee Date PLEASE NOTE: THIS PERMIT SHALL EXPIRE WITH THE ISSUED BUILDING PERMIT OR IF THERE IS NO BUILDING PERMIT WITHIN TWELVE MONTHS OF THE DATE OF ISSUANCE IF ACTIONS AUTHORIZED UNDER THE PERMIT ARE NOT SUBSTANTIALLY IN -PROGRESS. EXTENSIONS OF APPROVAL MAY BE SOUGHT IF SUBSTANTIAL PROGESS HAS TAKEN PLACE. Version 2 04-05 5 Version 2 04-05 5 Project Number: 09000489 Inv: 1 Application THIS IS NOT A PERMIT Penalties will be assessed for commencing work without a permit Date: 6/22/2009 Page 1 of 3 Project Information: Permit Use: CREATE A LANDSCAPE BED/LANDING AT Contact: SUWANMANEEDANG, THOMAS A. & H ROADSIDE -FLOODPLAIN Address: 1501 S BETTMAN C - S - Z: SPOKANE VALLEY WA 99212 Setbacks: Front Left: Right: Rear: Phone: (509) 217-1586 Group Name: Site Information: Project Name: GRADING -FLOOD PLAIN Plat Key: Name: Range District: Sout Parcel Number: 35243.1067 Block: SiteAddress: 1501 S BETTMAN RD Location:: CSV Zoning: R-3 SF Res District Lot: Owner: Name: SUWANMANEEDANG, THOMAS A Address: 1501 S BETTMAN SPOKANE VALLEY WA 99212 Water District: 100 SPO CO WATER DIST#3A Hold: O Area: 16,356 Sq Ft Width: 0 Depth: 0 Right Of Way (ft): 0 Nbr of Bldgs: 0 Nbr of Dwellings: 0 Review Information: Review Flood Plain Released By: see conditions. Originally Released: Fire District Review 6/22/2009 By: dgriffith Released By: Originally Released: Land Use Review 3/6/2009 By: THARVEY Released By: Originally Released: DE Plan/Site Drainage Review 3/9/2009 By: kkendall Released By: Originally Released: 6/22/2009 By: HMAIIen Operator: jmm Printed By: jmm Print Date: 6/22/2009 Project Number: 09000489 Inv: / Application THIS IS NOT A PERMIT Penalties will be assessed for commencing work without a permit Date: 6/22/2009 Page 2 of 3 Permits: Flood Plain Contractor: OWNER Firm: OWNER Phone: (000) 000-0000 Item Description FLOOD PLAIN PERMIT Units Unit Desc 1 NUMBER OF Permit Total Fees: Grading Permit Fee Amount $52.00 $52.00 Contractor: OWNER Firm: OWNER Phone: (000) 000-0000 This Application: Total Project: Description Grp Type Notes Sq Ft Valuation Sq Ft Valuation GRADING NONE NONE LANDSCAP 100 $100.00 100 $100.00 E Item Description GRADING PLANS CHECK GRADING PERMIT FEE Totals: 100 $100.00 100 $100.00 Units Unit Desc 1 SELECT 1 SELECT Operator: jmm Printed By: jmm Fee Amount $12.00 $20.00 Permit Total Fees: $32.00 Print Date: 6/22/2009 Project Number: 09000489 Inv: 1 Application THIS IS NOT A PERMIT Penalties will be assessed for commencing work without a permit Date: 6/22/2009 Page 3 of 3 Notes: NOTIFIED CUSTOMER THAT APPROACH PERMIT WILL BE REQUIRED FOR ANY ALTERATIONS TO THE APPROACH. HE STATED THAT IT WILL BE DONE AT A LATER DATE. Floodplain conditions: landscape bed will not be larger than submitted plan, must ensure and maintain erosion controls in the floodplain, no widening of the driveway, must clean out all brush from the ravine and floodplain, clear any sediment frm culverts NOTIFIED CUSTOMER THAT APPROACH PERMIT WILL BE REQUIRED FOR ANY ALTERATIONS TO THE APPROACH. HE STATED THAT IT WILL BE DONE AT A LATER DATE. BETTMAN'S ADDITION - LOTS 7 THROUGH 18 OF BLOCK 8; AND LOTS 9, 10, 15 AND 16 OF BLOCK 5 HAVE BEEN PULLED OUT OF THE FLOOD PLAIN. SEE PLAT FILE. Payment Summary: Permit Type Flood Plain Grading Permit Fee Amount Invoice Amount Amount Paid Amount Owing $52.00 $52.00 $0.00 $52.00 $32.00 $32.00 $0.00 $32.00 $84.00 $84.00 $0.00 $84.00 Disclaimer: Submittal of this application certifies the owner (or person(s) authorized by the owner) has both examined and finds the information contained within to be true and correct, and agrees that all provisions of laws and/or regulations governing this type of work will be complied with. Subsequent issuance of a permit shall not be construed to be a permit for, or an approval of, any violation of any of the provisions of the code or of any other state or local laws or ordinances. Signature: Operator: jmm Printed By: jmm Print Date: 6/22/2009 Jenna Davis From: Sent: To: Cc: Subject: Jenna, Paul.Seilo@CH2M.com Wednesday, March 25, 2009 11:25 AM Jenna Davis Mike Turbak; Jodi Main 09000489 - 1501 S BETTMAN - FLOOD PLAIN SUBMITTAL Sorry for the delay. You con see from our floodplain engineer's email below that he has been out sick. The application can be deemed complete and formal review started once we receive the missing information as described by the engineer. Also, we can set up a call with the applicant if he/she has questions about the missing information. Regards, Pau/ Sella CH2M HILL Tel: 503.736.4012 Origin/ Message From: Plaskett, Joe/PDX Sent: Wednesday, March 25, 2009 7:23 AM To: Sella, Paul/PDX Subject: RE: Spokane Valley Floodplain Assistance Hi Paul, I just got a chance to look at this brief/y on Friday. Then got sick over the weekend, and am just now back on my feet again. It looks like the application is complete except for a couple things. I need to see the source of the 100 -year flood f/ow that they have provided with the permit application. We need either the hydrologic calculations or a copy of the study where they found the number they used. We also need to know the upstream and downstream invert elevations for the four 30 -inch culverts under the existing driveway Joe Development Engineering 11707 E Sprague Ave Suite 106 ♦ Spokane Valley WA 99206 509.921.1000 ♦ Fax: 509.921.1008 ♦ cityhall@spokanevalley.org March 16, 2009 Edwin Simpson, P.E. Simpson Engineers, Inc. North 909 Argonne Road Spokane Valley, WA 99212 Re: Bettmann S 1501 - 09000489 - Suwanmaneedang Driveway Review Comments for Submittal #1 Development Engineering has reviewed your submittal of the Civil Plans for the above- mentioned project. The review was limited erosion control and grading as such but did not include impacts to the floodplain. The floodplain review is being done separately and comments will be provided in a separate letter. In the process of our review, there were items that we found needing additional attention. For us to continue our review, we request that the following be addressed. Note: SRSM = Spokane Regional Stormwater Manual 1. Requirements are from the SRSM; please update all references. 2. Confirm that the applicable sediment control standard notes from the SRSM are included on the plan. 3. Provide the name of the onsite contact. 4. Specify the size of crushed surfacing fill material. 5. Specify the vegetation for stabilization. 6. Please provide a copy of the channel calculations. Please provide a written response to each comment to ensure that we properly review any revisions or lack thereof. All submittals must be submitted to the Building Department Permit Center lodated at 11703 E Sprague Avenue, Suite B-3. If you have any questions, please email me at hallen@spokanevallev.org or call me at (509) 688-0174. Sincerely, Henry M. Allen Development Engineer Bettman S 1501- 09000489 - Driveway cc: Thomas Suwanmaneedang, 1501 S. Bettman Rd., Spokane Valley, WA 99212 Spokane Valley Building Department - Permit Center Spokane Valley Development Engineering — Project File Page 2 5Q° FV IRE A<<F� DEPARTMENT 10319 EAST SPRAGUE AVE. • SPOKANE VALLEY, WA 99206-3627 • (509) 928-1700 • FAX (509) 892-4127 www.spokanevalleyfire.com PREVENTION DIVISION March 6, 2009 Permit #: 09000489 Project Address: 1501 S. Bettman Road Project Description: Create a Landscape Bed/Landing at Roadside - Floodplain Applicant: Thomas Suwanmaneedang 1501 S. Bettman Road Spokane Valley, WA 99212 217-1586 RE: Permit Acceptance The Spokane Valley Fire Department approves the issuance of the permit for the property modifications for 1501 S. Bettman Road (Create a Landscape Bed/Landing at Roadside — Floodplain. If there are any questions please do not hesitate to call. Sincerely, Traci Harvey Fire Protection Engineer Spokane Valley Fire Department Cc Jodi Main Jenna Davis City of Spokane Valley City of Spokane Valley C:\Documents and Settings\jdavis\Local Settings\Temporary Internet Files\OLK2C9\Bettman S 1501 Permit Acceptance.doc S��"okane� P Ualle Development Engineering 11707 E Sprague Ave Suite 106 • Spokane Valley WA 99206 509.921.1000 ♦ Fax: 509.921.1008 ♦ cityhall®spokanevalley.org June 22, 2009 Edwin Simpson, P.E. Simpson Engineers, Inc. North 909 Argonne Road Spokane Valley, WA 99212 Re: Bettmann S 1501 - 09000489 - Suwanmaneedang Driveway Driveway Plan Acceptance The driveway improvement plan and calcs for the above-mentioned project have been reviewed and found to be consistent with pertinent development regulations and thus have been accepted. This review did not cover floodplain impacts; the floodplain review is being performed by others. Please contact the Building Department Permit Center located at 11703 E Sprague Avenue, Suite B-3 for additional requirements and/or permits. Revisions shall be noted on a copy of the approved final civil plans and shall be labeled Record Drawings. A pre -construction conference is not required. Please contact the Development Engineering Inspector, Rod Pegram, at 688-0025 for site items that need to be done during and after construction. Prior to Final Inspection: 1. Contact the Building Department to request final inspections. 2. Construction of all improvements must be completed and accepted. 3. The following items are required to be submitted to and accepted by Development Engineering: a. Record drawings b. Letter from design engineer certifying project constructed according to approved plans and specifications. If you have any questions, please email me at hallen(a spokanevalley.org or call me at (509) 688-0174. •fr • - Dev. Ens.: Bettman S 1501- 09000489 - Driveway - Plan Accept 22Jun09 Sincerely, Henry . Allen Development Engineer Copies: Thomas Suwanmaneedang, 1501 S. Bettman Rd., Spokane Valley, WA 99212 Spokane Valley Planning Department — Deanna Griffith Spokane Valley Building Department- Permit Center Spokane Valley Development Engineering: • Development Engineer Inspector • Project File 5Q°FIRE �cF�- DEPARTMENT 10319 EAST SPRAGUE AVE. • SPOKANE VALLEY, WA 99206-3627 • (509) 928-1700 • FAX (509) 892-4127 www.spokanevalleyfire.com PREVENTION DIVISION May 11,2009 Permit #: 09000489 Project Address: 1501 S. Bettman Road Project Description: Create a Landscape Bed/Landing at Roadside - Floodplain Applicant: Thomas Suwanmaneedang 1501 S. Bettman Road Spokane Valley, WA 99212 217-1586 RE: Revised Permit Review Comments The Spokane Valley Fire Department has completed a review of the revised site plan submittal for the above referenced project. The revisions do not affect prior Fire Department acceptance of the issuance of the permit. If there are any questions please do not hesitate to call. Sincerely, // Traci Harvey 171 y` t' ie Fire Protection Engineer Spokane Valley Fire Department Cc Jodi Main Jenna Davis City of Spokane Valley City of Spokane Valley O:\Dept Data Unshared\Prevention Unshared\Building Files\B - Master Property \Getman S\ Bettman S 1501 Permit Revisions.doc Simpson Engineers, Inc. CIVIL ENGINEERS & LAND SURVEYORS 909 N. Argonne Road • Spokane Valley, WA 99212 (509) 926-1322 • Fax: (509) 926-1323 May 04, 2009 Henry Allen P.E. Development Engineer 11707 E. Sprague Avenue Spokane Valley, WA 99206 Subject: 2nd Submittal Suwanmaneedang Driveway Improvements 1501 S. Bettman Rd. Dear Henry: Please accept the attached Drainage Plan for your review. I have also included pipe calculations and channel calculations for the existing drainage system as well as a copy of the July 2005 Floodplain Analysis Summary that Storhaug Engineering did. Feel free to call if you have any questions. Sinc rely, • Chris McCallum Simpson Engineers RECEIVED CSV PERM}T CENTER project # OR ? ny��g Name Submittal #_____2- Simpson Engineers, Inc. CIVIL ENGINEERS & LAND SURVEYORS 909 N. Argonne Road • Spokane Valley, WA 99212 (509) 926-1322 • Fax: (509) 926-1323 May 04, 2009 Henry Allen P.E. Development Engineer 11707 E. Sprague Avenue Spokane Valley, WA 99206 Subject: 2nd Submittal Suwanmaneedang Driveway Improvements 1501 S. Bettman Rd. Dear Henry: The attached Drainage Plan and supporting calculations are for a proposed driveway addition located at 1501 S. Bettman Rd. The proposed plan shows the existing features and topography; including the existing driveway, home, and drainage system. The plan also shows the location of the proposed 1,200 sq. ft. driveway addition. Currently, runoff from the existing drainage basin, to the south, flows through one of four 30" corrugated metal culverts, then continues to flow north down an existing channel, averaging a 30' width, a 6' depth with a minimum grade of 4%. The attached calculations show that 175 cfs could flow through the existing piping and that the existing channel would be approximately 6" deep at this flow rate. The attached Executive Summary of the July 2005 Floodplain Analysis, done by Storhaug Engineering, shows that a flow rate of 31 cfs is anticipated during a 100 year rainfall event. Given these calculations the proposed plan does not inhibit the existing flow pattern. The proposed plan will alter the existing side slope from a 6:1 (h:v) slope to a 2:1 slope. County standards will be used for compactions of the driveway and vegetation will be added to the side slope to minimize erosion. Feel free to call if you have any questions. Chris McCallum Simpson Engineers FLOODPLAIN ANALYSIS PANEL 300 OF 625 COMMUNITY -PANEL NUMBER 530174 0300 C CITY OF SPOKANE VALLEY, WA 200 Oilbaphov of Stamm Road A"2 14th and Bettman icwbmCIAL rxiliuc DOC .. SE Project No: 04-014 tSHINE VALLEYENGINEERs ORIGINAL July 2005 s'nI77`".a 3 6 L So$t STORHAUG ENGINEERING Civil Engineers and Land Use Planners 510 East Third Avenue, Spokane, Washington 509-242-1000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 146 and Bettman Floodplain Analysis SE Project Number: 04-014 Executive Summary: This floodplain analysis of the Central Park watershed in the vicinity of Bettman Road and 14`h Avenue was initiated to determine the impact of proposed improvements upon adjacent properties. The study encompasses roughly 1000 feet of the channel beginning approximately at the 15th avenue right-of-way. This study utilized storm discharges calculated in the hydrologic study "Master Plan for the Glenrose creek / Central Park" performed by Montgomery Watson and supplied by Spokane County. Relevant information from the final report is provided in Appendix A. A direct value for the flow through the area (Figure 4-4, Appendix A) was not available for ultimate development. The flow was determined to be the runoff of basins C6, C7, C8, and C9. The method derived a flow of 31 cfs in a 1% annual chance (100 year) rainfall storm. A topographic survey was performed beginning in the fall of 2003 and continuing through the summer of 2004. The survey was performed under the direction and supervision of a registered land surveyor in the state of Washington. This survey was based on a NAVD 88 datum. All areas of the 1% annual (100 year) chance event within the boundaries of the property were surveyed. Additional topographic information was obtained off a USGS map. Contours, at 1 foot intervals, are shown on the exhibits in Chapter 1 of this report. The floodplain delineation and HEC -RAS cross-section data input were based upon the topographic information obtained in this survey and off the USGS map. The delineation of the 1% (100 year) annual chance storm event, as previously delineated by FEMA was obtained off the existing FEMA FIRM (Flood Insurance Rate Map) for Spokane County Panel no. 300 of 625. Their delineation through the subject property is shown on the following Exhibits 1 and 2. Their delineations are approximate and shown for comparison only. HEC -RAS 3.1.2 computer software was used to analyze the existing conditions of the site and provide calculated water surface elevations along the subject property. Water only flows in the channel during major storm events which has resulted in a high level of debris and vegetative cover. A natural stream with some weeds and stones describes the property accurately; so a Mannings roughness coefficient ("n" value) of 0.045 was used throughout the analysis. Appendix B contains reference material for our selection of the "n" coefficient. A 30" culvert is proposed to convey the storm water under the proposed 14th Avenue roadway. A storm water detention pond (also known as a "208" swale) will necessitate grading operations in the North-West corner of the subject property, which lies within the edge of the floodplain delineation. The proposed improvements will reroute the storm waters but do not have a negative impact on the existing floodplain delineation located on adjacent property owned by others, nor does it raise the base flood elevation 1.0' or greater. 1 of 1 tmp#1.txt Manning Pipe Calculator Given Input Data: Shape Circular Solving for Flowrate Diameter 30.0000 in Depth 22.5000 in Slope 0.0270 ft/ft Manning's n 0.0200 Computed Results: Flowrate 39.9482 cfs Area 4.9087 ft2 Wetted Area 3.9491 ft2 wetted Perimeter 62.8319 in Perimeter 94.2478 in Velocity 10.1158 fps Hydraulic Radius 9.0506 in Percent Full 75.0000 Full flow Flowrate 43.8087 cfs Full flow velocity 8.9246 fps Critical Information Critical depth 27.7352 in Critical slope 0.0149 ft/ft Critical velocity 8.1075 fps Critical area 5.1075 ft2 Critical perimeter 72.5942 in Critical hydraulic radius 10.1314 in Critical top width 30.0000 in Specific energy 3.5265 ft Minimum energy 3.4669 ft Froude number 1.4338 Flow condition Supercritical Page 1 tmp#3.txt channel Calculator Given Input Data: Shape Rectangular Solving for Depth of Flow Flowrate 160.0000 cfs Slope 0.0400 ft/ft Manning's n 0.0175 Height 72.0000 in Bottom width 360.0000 in Computed Results: Depth 6.0692 in velocity 10.5450 fps Full Flowrate 8065.5144 cfs Flow area 15.1731 ft2 Flow perimeter 372.1385 in Hydraulic radius 5.8713 in Top width 360.0000 in area 180.0000 ft2 Perimeter 504.0000 in Percent full 8.4295 critical Information Critical depth 0.0000 in - critical slope 0.0000 ft/ft Critical velocity 0.0000 fps Critical area 0.0000 ft2 Critical perimeter 0.0000 in. Critical hydraulic radius 0.0000 in Critical top width 0.0000 in specific energy 0.0000 ft Minimum energy 0.0000 ft Froude number 0.0000 Flow condition Critical Page 1 MapOptix 5.2 Interface Page 1 of 1 Tools ® PRISM �71rr*W any/No F X Seweclion X ■ 46061 Tabular Results Scale 11533 o?dL 5 ft http://sirius/mox52/index.cfin?action=mox52_if Prism&screenHeight=620&screenWidth=10... 05/15/2009 MapOptix 5.2 Interface Page 1 of 1 Tools ® PRISM wee X ■ 26062 Query/ WO II arm gTabular Results Scale 1 533 ac0- 4 http://sirius/mox52/index.cfm?action=mox52_if Prism&screenHeight=620&screenWidth=l0... 05/15/2009 MapOptix 5.2 Interface Tools gRISM Page 1 of 1 X • 25051 MIN te^ Si SPIN• O l� igTabular Results Scale 1:153 aco5 http://sirius/mox52/index.cfm?action=mox52_if Prism&screenHeight=620&screenWidth=10... 05/15/2009 MapOptix 5.2 Interface Page 1 of 1 Tools pi PRISM X • 25051 tom j) Que„ irro ElTabular Results Scale 1:1362 ,2o0 (1 http://sirius/mox52/index.cfin?action=mox52 if Prism&screenHeight=620&screenWidth=l0... 05/15/2009 MapOptix 5.2 Interface Page 1 of 1 Tools fl PRISM 4e14k x Seiecto Kon sigiffn X • 26061 I lgTabular Results Scale 1: 533 http://sirius/mox52/index.cfm?action=mox52_if Prism&screenHeight=620&screenWidth=10... 05/15/2009 MapOptix 5.2 Interface Page 1 of 1 Tools EIPRISM p X.25061 ,ndory/Ink , Sekcvnn sysion e �. aTabular Results 1© Scale 1.533 (=.<Z,D7 http://sirius/mox52/index.cfm?action=mox52_if Prism&screenHeight=620&screenWidth=10... 05/15/2009 MapOptix 5.2 Interface Page 1 of 1 Tools ® PRISM x•26061 ElTabular Results Scale 1 1362 1(2o1 http://sirius/mox52/index.cfm?action=mox52_if Prism&screenHeight=620&screenWidth=10... 05/15/2009 MapOptix 5.2 Interface Tools PI PRISM Niutsion Page 1 of 1 X = 26061 OiMrylNo Rs'1°e" O1n la SO= ElTabular Results Scale 1: 533 http://sinus/mox52/index.cfm?action=mox52_if Prism&screenHeight=620&screenWidth=10... 05/15/2009 MapOptix 5.2 Interface Page 1 of 1 Tools ® PRISM Nrapion ons l 1" kSelection g.„ sem, X • 25052 Tabi.!ar REr :s Scale 1:1362 Ac3pg http://sirius/mox52/index.cfm?action=mox52_if Prism&screenHeight--620&screenWidth=10... 05/15/2009 rn 0 7130 0 /. ,.515 PP; :51 38$IP thh • g riq Vgg 11.8 hd 90 D 2 Gd A?N31Q ES ��9a Y r orfrap.ij 'i 445 frggiJ • p Ftirg 'cd Nd?S:ET B00E ET •ReN 0ET0 LEIS 609: 'ON XNd Bd a3H5I3 O; 1,1063 Td WdS£:PO LOOZ S2 'Inc OZTO LZ6 60S: 'ON XNd 3d 83H513 3: WOdd MapOptix 5.2 Interface Page 1 of 1 Tools p Nam -auto el sr aerynnb 1Q-21‘ 11 aSelection Sa Spann PRISM X = 25051 r t 1jnIl1II` r �_. ♦ 0 "S. 4 . G_F 1, -� _� . Li r v }}r . ; ire - oesco �` — City vauoy c3 —7 .:1111.111117r , -.1` C i , Com"'. \.;. cA o 0 `- 0 .r— r 'C^ �V �Ct ''1 lS `1 Y S E '' 7` a` R !i '" . �. 1 1 d 3ill.=b 1 R IDI Tabular Results Scale 1: 533 a RI kg http://sirius/mox52/index.cfm?action=mox52_if Prism&screenHeight=620&screenWidth=l0... 05/15/2009