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HomeMy WebLinkAbout04.20.21 Changes to Improvement Standards Since 2006 From:Pack, Joshua To:Alpert, Bruce;Bennett, Robin;Clerk of the Board;Connelly, Bill;Cook, Holly;Cook, Robin;Kimmelshue, Tod; Lucero, Debra;Paulsen, Shaina;Pickett, Andy;Ring, Brian;Ritter, Tami;Rodas, Amalia;Sweeney, Kathleen; Teeter, Doug Cc:Ataie, Feraidon;Ott, Radley;Nuzum, Danielle Subject:Changes to Improvement Standards Since 2006 Date:Tuesday, April 20, 2021 4:27:04 PM Attachments:Res 09-022 Paradise Imp Stds 02-24-09.pdf Resolution_No._20-022.pdf Improvement Standards Changes since 2006.docx Good afternoon Board members – At last week’s meeting, the Board asked Public Works to report back on updates to the published Improvement Standards since their adoption in 2006. There were two resolutions adopting updates to the Improvement Standards in February 2009 and February 2020. I’ve attached both resolutions along with a redline accounting of the changes for your reference. During our review, we found that the digital copy available to the public online did not reflect some of the adopted changes. Our team is working to revise and update the public digital copy to accurately reflect these changes. We’re not aware of any issues that have resulted from this discrepancy but grateful for the opportunity to resolve the issue. I expect the revised copy to be uploaded in the coming weeks. I appreciate the Board bringing this to our attention. Thanks for the opportunity to provide this update to you all. As always, please feel free to follow up with any questions or comments. Josh Joshua Pack Director of Public Works 7 County Center Drive Oroville, CA 95965 530.538.7681 Phone 530-538-7171 Fax jpack@buttecounty.net EXHIBIT A R EPLACE THE FOLLOWING EXISTING TEXT OF S ECTION 10: 10.05-3.01 Use Chart D-1 (Oroville Area), D-2 (Paradise Area), or D-3 (Chico Area) to determine rainfall intensity in inches per hour for a 10-year and a 100-year frequency storm. In no case, shall the time of concentration be less than 10 minutes. W ITH THE FOLLOWING TEXT: 10.05-3.01 Use current National Oceanic and Atmospheric Administration (NOAA) point precipitation frequency estimates from online website mapping tool at https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=pato determine rainfall intensity in inches per hour for a 10-year and a 100-year frequency storm. Utilize precipitation data from 5-minutes through 24-hours in hydrology calculations. Provide documentation of the project site location and NOAA data used in calculations. Documentation shall be a digital or hard- copy printout of the website information. In the event the NOAA Website is not accessible, use Tables D-1A through D-1N. EXHIBIT B APPENDIX IV DRAINAGE CHARTS Rainfall Intensity –OrovilleD-1 Rainfall Intensity – Paradise D-2 Rainfall Intensity – Chico D-3 Chico Area Rainfall Data; Intensity D-1A Chico Area Rainfall Data; Depth D-1B Forest Ranch Area Rainfall Data; Intensity D-1C Forest Ranch Area Rainfall Data; Depth D-1D Magalia Area Rainfall Data; Intensity D-1E Magalia Area Rainfall Data; Depth D-1F Cohasset Area Rainfall Data; Intensity D-1G Cohasset Area Rainfall Data; Depth D-1H Concow Area Rainfall Data; Intensity D-1I Concow Area Rainfall Data; Depth D-1J Oroville Area Rainfall Data; Intensity D-1K Oroville Area Rainfall Data; Depth D-1L Berry Creek Area Rainfall Data; Intensity D-1M Berry Creek Area Rainfall Data; Depth D-1N Reserved for Future Use D-2 Reserved for Future Use D-3 Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html CHICO (Intensity, in/hr) Butte County Improvement Standards; Rainfall Criteria D-1A Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html CHICO (Depth, in) Butte County Improvement Standards; Rainfall Criteria D-1B Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html FOREST RANCH (Intensity, in/hr) Butte County Improvement Standards; Rainfall Criteria D-1C Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html FOREST RANCH (Depth, in) Butte County Improvement Standards; Rainfall Criteria D-1D Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html MAGALIA (Intensity, in/hr) Butte County Improvement Standards; Rainfall Criteria D-1E Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html MAGALIA (Depth, in) Butte County Improvement Standards; Rainfall Criteria D-1F Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html COHASSET(Intensity, in/hr) Butte County Improvement Standards; Rainfall Criteria D-1G Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html COHASSET(Depth, in) Butte County Improvement Standards; Rainfall Criteria D-1H Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html CONCOW (Intensity, in/hr) Butte County Improvement Standards; Rainfall Criteria D-1I Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html CONCOW (Depth, in) Butte County Improvement Standards; Rainfall Criteria D-1J Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html OROVILLE (Intensity, in/hr) Butte County Improvement Standards; Rainfall Criteria D-1K Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html OROVILLE (Depth, in) Butte County Improvement Standards; Rainfall Criteria D-1L Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html BERRY CREEK (Intensity, in/hr) Butte County Improvement Standards; Rainfall Criteria D-1M Rainfall Estimates provided are provided to supplement the NOAA website if non-operable. Please provide site specific rainfall data using the Point Precipitation Frequency Estimates online service, found at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html BERRY CREEK (Depth, in) Butte County Improvement Standards; Rainfall Criteria D-1N Reserved for Future Use Butte County Improvement Standards; Rainfall Criteria D-3 Reserved for Future Use Butte County Improvement Standards; Rainfall Criteria D-3 Butte County Improvement Standards Changes since 2006 2009revision: Resolution No. 09-022 Text underlinedwereapproved as new additions to the standards. 1.Revise Section 9.01-2 to read as follows: 9.01-2RS-2 All Urban Land Division TypeRoads -Urban development with urban areas designated in Appendix I,except for the Paradise Urban Area. RS-2A Arterials and major collectors RS-2B Minor collectors and local access roads. RS-2C Short Cul-de-sacstreet (less than 500’, no onstreet parking) may only be used with approval of the Director. 2.Revise Section 9.03-1 to read as follows: The following standards for the design of geometric and structural 9.03-1 sections for proposed improvements shall govern the preparation of plans for such improvements. The RS-2 Standards apply to all divisions of land within the defined urban areas,except for the Paradise Urban Area. 3.Add Section 9.01-13 to read as follows: 9.01-13Paradise Urban Area/Sphere of Influence PS-1Private Drive-Single Dwelling PS-2Private Drive-Double Dwelling PS-3Residential Local Minor Street PS-4Residential Local Street PS-5Residential Collector Street PS-6Minor Collector Street PS-7Collector Street PS-8Arterial & Major Collector Street PS-9Neal & Pentz Roads PS-10Upper Skyway (Pentz Road to South Park Drive) PS-11Upper Skyway (South Park Drive to Wycliff Road) PS-12Upper Skyway (Wycliff Road to end of Sphere) PS-13Lower Skyway 4.Add the attached Appendix II Subdivision Road Standards PS-1, PS-2, PS-3, PS-4, PS-5, PS-6, PS-7, PS-8, PS-9, PS-10, PS-11, PS-12and PS-13. 5.Revise Appendix III Standard Detail S-5A to the attached standard detail. 6.Add the attached Appendix III Standard Details S-45, S-46, S-47and S-48. 2020revision: Resolution No. 20-022 The underlined text was added and the strikeout text was deleted. 10.05-3.01Use Chart D-l (Oroville Area), D-2 (Paradise Area), or D-3 (Chico Area) to determine rainfall intensity in inches per hour for a 10-year and a 100- year frequency storm. In no case, shall the time of concentration be less than 10 minutes. Use current National Oceanic and Atmospheric Administration (NOAA) point precipitation frequency estimates from online website mapping tool at https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=pato determine rainfall intensity in inches per hour for a 10-year and a 100-year frequency storm. Utilize precipitation data from 5-minutes through 24- hours in hydrology calculations. Provide documentation of the project site location and NOAA data used in calculations. Documentation shall be a digital or hardcopy printout of the website information. In the event the NOAA Website is not accessible, use Appendix III, Standards D-1A through D-1N.