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HomeMy WebLinkAboutENCLAVE AT REDWOOD - FDP220014 - DOCUMENT MARKUPS - ROUND 2 - RESPONSE TO STAFF REVIEW COMMENTSProject: Disturbed Acres:29.66 EROSION CONTROL BMPs Units Estimated Quantity Unit Price Total Price L.F. 0 $2.50 $0.00 L.F. 0 $5.00 $0.00 EA. 41 $100.00 $4,100.00 EA. 0 $50.00 $0.00 L.F. 0 $2.50 $0.00 Sub-Total: $4,100.00 1.5 x Sub-Total: $6,150.00 Amount of security: $6,150.00 Total Acres x Price/acre: $59,320.00 $2,000.00 Sub-Total: $59,320.00 1.5 x Sub-Total: $88,980.00 Amount to Re-seed: $88,980.00 Minimum escrow amount: $3,000.00 Erosion Control Escrow:$88,980.00 Fields in yellow should be amended for this project. Miniumum Escrow Amount Enclave at Redwood Unit Price of Seeding per acre: “The amount of the security must be based on one and one-half times the estimate of the cost to install the approved measures, or one and one-half times the cost to re-vegetate the disturbed land to dry land grasses based upon unit cost determined by the City's Annual Revegetation and Stabilization Bid, whichever is greater. In no instance, will the amount of security be less than one thousand five hundred dollars ($1,500) for residential development or three thousand dollars ($3,000) for commercial development” Inlet Protection (IP) Final Escrow Amount Erosion and Sediment Control Escrow/Security Calculation for The City of Fort Collins BMP Amount Silt Fence (SF) Rock Socks (RS) Sockpile Protection Reseeding Amount Construction Fence (CF) 10/18/2022 12:35 PM K:\201013\Documents\Erosion\Cost Estimates\SWMP Escrow.xls Summary of Comments on FDP220014 - Enclave at Redwood Rnd 1pdf.pdf Page: 9 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 1:45:25 PM Calculation sheet needs all BPM's from ESC Plan and quantities. Also Disturbed Area needs to be the same as the ESC Plan per FCSCM Ch. 2 Sec. 6.7.5 EROSION AND SEDIMENT CONTROL PLAN FOR ENCLAVE AT REDWOOD FORT COLLINS, CO 80524 October 19, 2022 Prepared for: 9555 S Kingston Ct Suite 200 Englewood, CO 80112 Prepared by: Rachel Patton, P.E. 1120 Lincoln Street, Suite 1000 Denver, CO 80203 Ph: 303-623-6300, Fax: 303-623-6311 Harris Kocher Smith Project No.: 201013 Page: 12 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 11:52:08 AM Erosion Control Reports must be stamped by licensed PE for final acceptance per FCSCM Chap. 2 Sec. 6.1.4 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 12:06:23 PM Title page missing required items (Owner, Developer, Contractor and EC Administrator contact info) per FCSCM Chap.2 Sec. 6.1.4.1 Stormwater Management Plan Enclave at Redwood Page 4 of 9 October 19, 2022 The Site generally slopes from west to east at grades between roughly 0.3% and 1% towards Lake Canal. The side slopes of the canal vary from 2:1 to 4:1. The thalweg slope of the canal is very flat. During irrigation flows in the canal, the canal flows to the northeast along the east property boundary. Perimeter silt fence will contain stormwater run-off onsite. There are currently no existing stormwater or erosion control measures on-site. The Redwood Meadows Pond has existing wetlands area which is adjacent to the northwest corner of the site. The wetlands boundary is approximately 10’ feet away from the property line. The wetlands area is approximately 0.53 acres. There is an additional pond to the northeast. This pond is the Evergreen East Pond which has approximately 1.64 acres of wetland. The city owned ditch on the north side of the site connects these two wetland areas. Perimeter controls will be implemented along the south edge of the city owned ditch to retain stormwater onsite. Impacts to the wetlands are not anticipated at this time and erosion measures will be put in place to contain stockpiles and protect the Redwood Meadows Pond and wetlands from any site runoff. There are three soil types as identified by the Natural Resource Conservation Service (NRCS) Web Soil Survey. Loveland Clay Loam, Nunn Clay Loam, and Nunn Clay Loam (wet). All soil on site is classified as hydrologic soil group C. These soils are cohesive and are moderately resistant to wind and water erosion. A copy of the soil survey is included in Appendix B. Ground water was also encountered during initial soil testing. Groundwater depths range from 8-12 feet from existing grade and will eventually be 8-17 feet under finished proposed grades. Groundwater was not sampled and tested for any existing contamination. Soil testing did not show any ground contamination. The Site is shown on the Federal Emergency Agency’s (FEMA) Flood Insurance Rate Map (FIRM) Community Panel Numbers 08069C0977G and 08069C0981G, effective June 17, 2008. Lake Canal is partially located within Zone X (0.2% annual chance flood hazard) and therefore the Site is partially within this zone. Because the development of the Site will not involve altering of Lake Canal, no floodplain modifications are necessary. Please refer to Appendix A for more details. VI. Existing Vegetation Currently, the Site consists of mostly native grasses and vegetation. Vegetation covers approximately 98% of the site. There is very little impervious area onsite, if any, in the current condition. VII. Potential Pollution Sources The construction activities associated with this project will have some potential to pollute the storm water being discharged from the Site. If these erosion measures are not properly installed off-site sediment may occur with large stormwater flows. This has potential to damage the surrounding wetlands. Below are the pollutants with a short description of each: Page: 15 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 12:53:36 PM Please add items 5,9,and 14 and indicate if any potential sources of pollution are present on site per FCSCM Ch.2 Sec. 6.1.4.4 Stormwater Management Plan Enclave at Redwood Page 6 of 9 October 19, 2022 Dust or Particulate Generating Processes Significant dust or particulate generating processes are a potential pollution source for the Site. Dust mitigation, surface roughening, and seeding and mulching shall be implemented to mitigate airborne dust pollutants. These activities will be need to be conducted in accordance with the City of Fort Collins Fugitive Dust Ordinances. The Dust Control Manual can be found at www.fcgov.com/dust On-Site Waste Management Practices On-site waste management practices (waste piles, liquid wastes, dumpsters, etc.) are not a potential pollution source for the Site during stockpile activities. Concrete Truck/Equipment Washing Concrete truck and equipment washing is not a potential pollution source for the Site and should only occur at the designated Concrete Washout Area shown on the SWMP. Dedicated Asphalt and Concrete Batch Plans Dedicated asphalt and concrete batch plants are not a potential pollution source for the Site. There will not be any dedicated concrete or asphalt batch plants on site. Non-Industrial Waste Sources Non-industrial waste sources such as worker trash and portable toilets are not potential pollution source for the Site. Other Areas or Procedures Where Potential Spills Can Occur Other areas or procedures where potential spills can occur are not a potential pollution source for the Site. VIII. Potential Non-Stormwater Discharges Non-stormwater components of discharge, such as condensate from construction trailers, underground springs and landscape irrigation return flow are not anticipated to occur with this development. However, the contractor shall be responsible to monitor for such discharges and notify the engineer in such an event. If construction dewatering is necessary, the contractor shall be responsible for ensuring a construction dewatering permit is obtained prior to discharging water to surface water or storm sewer systems. IX. Receiving Water(s) During high stormwater events, the Site currently drains to the lake canal ditch, city owned ditch and some minor flow may make its way into the redwood meadows pond. There are no controls on site to direct run off in any concentrated direction. According to the EPA, there are two receiving waters for this Site; Dry Creek which is the receiving water for the North East College Corridor Outfall (NECCO) and Timnath Reservoir which receives irrigation water from Lake Canal Reservoir Company. Page: 17 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 12:16:03 PM please provide a pathway to the nearest receiving waters (From the outfall point(s) of the project and the flow path to Fossil Creek Reservoir or the Poudre River with directions and distances) per FCSCM Ch. 2 Sec. 6.1.4.3 Stormwater Management Plan Enclave at Redwood Page 9 of 9 October 19, 2022 Seeding and Mulching (SM) Measures that include means to return the exposed dirt to a stabilized condition, one what will not continue to result in erosion or sediment transport. A City approved seed mix will be applied to stabilize the stock pile until final grading activities have commenced. Street Sweeping (SS) Street sweeping and vacuuming is to remove sediment that has been tracked onto roadways to reduce sediment transport into storm drain systems or a surface waterway. This can be done manually or with specific vehicles designed for this purpose. Street sweeping should be performed in periodic intervals and when there is noticeable sediment accumulation. XIII. SWMP Administrator The stormwater management plan (SWMP) administrator shall be the Construction Site Superintendent.  The Site superintendent is responsible for implementing and maintaining the Stormwater Management Plan.  The SWMP administrator shall contact the engineer of record for development and revisions of the SWMP.  The SWMP administrator shall be responsible for reporting spills.  The SWMP administrator shall conduct Site inspections and shall verify that repairs to the BMPs have been completed and certify corrections.  The SWMP administrator shall conduct BMP training. XIV. Final Stabilization and Long-Term Stormwater Management Upon the completion of stockpiling activities, proper stabilization and vegetation will be established with a native seed mix. Disturbed open space areas and the stock pile area will be planted with Native Seed. Disturbances are to be minimized, especially on slopes greater than 4:1. Final stabilization is reached when all soil-disturbing activities at the Site have been completed, and uniform vegetative cover has been established with a density of at least seventy percent of pre-disturbance levels or equivalent permanent, physical erosion reduction methods have been empl oyed. Soil compaction will be minimized for areas where final stabilization will be achieved through vegetative cover or an infiltration control measure. Seeding needs to comply with City of Fort Collins landscape standards. See Stockpile plan notes to establish proper native seed application and acceptance. All seeded areas will be crimped and mulched same day or next day after seeding in accordance with the Temporary and Permanent Seeding Details associated with this project as seen in the appendix, and in accordance with the City of Fort Collins Erosion Control Criteria. Once installed there will be no temporary irrigation system so all seeding will be monitored until the site has reached a vegetative cover (density) of 70%. It is anticipated that this site will be seeded in the spring of 2023 and will be fully established in the fall of 2026. At the point the vegetation has reached 70% density, and confirmed by the City of Fort Collins, the warranty period for Erosion Control will begin, all stormwater infrastructure will be cleaned and removed of any sediment deposits and any remaining temporary Control Measures will be removed. Page: 20 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 1:00:46 PM Indicate Soil perpetration and amendments in accordance with Municipal Code 12-123 as per FCSCM Ch.2 Sec. 6.1.4.9 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 1:06:15 PM Please provide a discussion of sediment removal from all pipes, drainage ways and other stormwater structures. Describe how the sediment will be disposed of correctly before the last remaining temporary Control Measures are removed from the project and the project has achieved final stabilization per FCSCM Ch.2 Sec.6.1.4.9 Filepath: K:\201013\ENGINEERING\EROSION\SWMP - STOCKPILE - COVER.DWG Layout: LAYOUT12 XREFs: dhic logo, vic mapPlotted: TUE 10/18/22 3:44:07P By: Miles SustadNO CHANGES ARE TO BE MADE TO THIS DRAWING WITHOUT WRITTEN PERMISSION OF HARRIS KOCHER SMITH.Know what's below.Call before you dig. ® 1120 Lincoln Street, Suite 1000 Denver, Colorado 80203 P: 303.623.6300 F: 303.623.6311 HarrisKocherSmith.com ISSUE DATE: DATE REVISION COMMENTS PROJECT #:20101310-19-2022 ENCLAVE AT REDWOOD SITUATED IN THE SOUTHEAST QUARTER OF SECTION 1, TOWNSHIP 7 NORTH, RANGE 69 WEST OF THE SIXTH PRINCIPAL MERIDIAN CITY OF FORT COLLINS, COUNTY OF LARIMER, STATE OF COLORADO TEMPORARY EROSION AND SEDIMENT CONTROL PLANS (TESC) SCALE: 1" = VICINITY MAP 900' “”” ” ” ” ” ” ” ” ” ” ” ” ” ” ” ” ” “”” ” ” ” ” ” ” ” ” ” ” ” 1120 Lincoln Street, Suite 1000 Denver, Colorado 80203 P: 303.623.6300 F: 303.623.6311 HarrisKocherSmith.com CALCULATIONS CHART TOTAL DISTURBED AREA 30.67 ACRES TOTAL "ONSITE" AREA OF DISTURBANCE 26.31 ACRES TOTAL "OFFSITE" AREA OF DISTURBANCE 4.36 ACRES TOTAL STORAGE/STAGING AREA 19.14 ACRES TOTAL HAUL ROADS AREA CONSTRUCTION VEHICLE TRAFFIC AREA EST. PERCENT OF PROJECT AREA EXPOSED N/A EST. PERCENT VEGETATIVE COVER 98%DENSITY EXISTING SOIL TYPE LOVELAND CLAY LOAM, NUNN CLAY LOAM, AND NUNN CLAY LOAM (WET) GROUNDWATER DEPTH 7-17 FEET NUMBER OF PHASES W/ PROJECT 1 TOTAL VOLUME OF IMPORTED (+) / EXPORTED (-) MATERIALS 0 CUBIC YDS. TOTAL AREA OF STOCKPILLING OR FILL OR BORROW AREAS OFF SITE 0 ACRES STEEPEST SLOPE 3:1 H:V DISTANCE FROM A RIPARIAN AREA OR SENSITIVE AREA 10 FEET ABBREVIATIONS BOP BOTTOM OF PIPE BS BOTTOM OF STEP BW BOTTOM OF WALL (FG) CONC CONCRETE DIA DIAMETER DIP DUCTILE IRON PIPE DR DOOR DS DOWNSPOUT E EAST, EASTING EGL ENERGY GRADE LINE EL ELEVATION EOA EDGE OF ASPHALT EOC EDGE OF CONCRETE EOP EDGE OF PAVEMENT ESMT EASEMENT EX EXISTING FES FLARED END SECTION FF FINISHED FLOOR FG FINISHED GRADE FH FIRE HYDRANT FLOW LINE GB GRADE BREAK GV GATE VALVE HC HANDICAP HGL HYDRAULIC GRADE LINE HORZ HORIZONTAL HP HIGH POINT INV INVERT LP LOW POINT LSD LANDSCAPE DRAIN MAX MAXIMUM MH MANHOLE MIN MINIMUM MJ MECHANICAL JOINT N NORTH, NORTHING PHS PHASE PR PROPOSED PVC POLYVINYL CHLORIDE RCP REINFORCED CONCRETE PIPE ROW RIGHT-OF-WAY SAN SANITARY SS SANITARY SEWER STA STATION STM STORM TB THRUST BLOCK TBC TOP/BACK OF CURB TOP TOP OF PIPE TS TOP OF STEP TW TOP OF WALL (FG) TYP TYPICAL UG UNDERGROUND VERT VERTICAL WAT WATER SHEET INDEX Sheet Number Sheet Title 1 COVER 2 NOTES 3 INITIAL TESC PLAN 4 INTERIM TESC PLAN 5 FINAL TESC PLAN 6 DETAILS 7 DETAILS 8 DETAILS 9 DETAILS PRELIMINARY NOT FORCONSTRUCTION Page: 58 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 11:33:31 AM Provide sequencing per FCSCM Ch 2 Sec. 6.1.3.2 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 11:34:36 AM Plans and reports need to be stamped by a licensed PS per FCSCM Ch.2 Sec. 6.1.3 VTC RS RS IP IP IP LOC CF SF LOC CF SF SS CWA SSA SHEET NUMBER ISSUE DATE: DATE REVISION COMMENTS DESIGNED BY: CHECKED BY: DRAWN BY: PROJECT #: 1120 Lincoln Street, Suite 1000 Denver, Colorado 80203 P: 303.623.6300 F: 303.623.6311 HarrisKocherSmith.com Know what's below.Call before you dig. ®FILEPATH: K:\201013\ENGINEERING\EROSION\SWMP - STOCKPILE.DWG LAYOUT: LAYOUT110 XREFs: cd-dhic logo, e-base, e-legal, e-offsite, e-util, keymap - offsite, p-base[U], p-legal[U], p-water[U], stamp-swmpPLOTTED: TUE 10/18/22 3:44:23P BY: MILES SUSTAD201013 ENCLAVE AT REDWOOD INITIAL TESC PLAN PRELIMINARY STOCKPILE 3 3 OF 9 10-19-2022 CLH RCP CLH NO CHANGES ARE TO BE MADE TO THIS DRAWING WITHOUT WRITTEN PERMISSION OF HARRIS KOCHER SMITH.0 SCALE: 1" = 100 100 200 100' LOC CF SF VTC IP RS SP SS MATCHLINE - SEE THIS SHEET MATCHLINE - SEE THIS SHEET KEY MAP PRELIMINARYNOT FORCONSTRUCTIONCWA SSA Page: 60 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 11:41:21 AM Please provide flow arrows for proposed construction including all curb and gutters marked with flow arrows per FCSCM Cg.2 Sec. 6.1.3.3 DSDSDSDS DS DS DS DS DS DSDS DS DS DS DS DS DS DS DSDS DSDSDS DSDS DS DSDS DS DS DS DS DSDS DSDS DS DSDSDS DS DS DSDSDS DS DS DS DS DS DS DS DS DS DS DSDS DS DS DS DSDS DS DSDSDSDSDS DS DSDS DS DS DS DS DS DS DSDSDSDSDS DSDSDSDSDS DSDSDSDS DS DSDSDS DS DS DS DSDSDSDSDSDS DS DSDSDS DS DS DS DS DS DS DS DS DSDS DSDS DS DS DSDS DS DS DS DS DS DS DS DS DS DS DS DS DS DSDSDS DS DS DS DSDSDSDS DS DS DS DS DS DS DS DS DS DSDSDSDS DSDSDSDSDSDSDSDSDS DSDSDSDSDSDSDSDS DSDS DSDS DSDSDS DS DS DS DS DS DS DS DS DS DS DSDSDSDSDSDSDS DS DS DS DSDSDSDS DS DS DSDSDS DS DSDSDS DS DS DSDS DSDS DSDSDSDSDSDS DS DS DS DS DSDS DS DSDS DSDSDS DS DS DS DS DS DSDS DSDS DS DS DSDSDSDSDSDSDSDS DS DS DS DS DSDSDSDSDSDSDS DS DSDSDSDSDSDSDSDSDSDSDSDSDS DS DSDSDS DSDS DSDS DS DS DS DS DS DS DS DS DS DSDSDS DS DS DS DSDSDSDSDS DS DS DS DS DS DS DSDS DSDSDSDS DS DS DSDSDSDS DSDSDSDS DSDS DSDS DS DSDS DSDS DS DSDS DSDS DS DS DS DS DS DS DS DS DS DS DS DS DS DSDSDSDSDSDSDS DSDSDSDSDSDS DS DSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDS DSDS DSDS DS DS DS DS DS DS DS DS DS DS DS DS DS DS DS DSDSDS DSDSDS DSDS DSDS DSDSDS DS DS DS DS DS DS DS DS DSDSDSDS DS DS DS DS DSDSDS DS DS DS DS DS DS DS DS DS DSDS DSDSDSDSDS DS DS DS DSDS DS DS DS DS DS DS DS DS DSDSDSDS DS DSDS DS DSDSDSDS DS DSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDS DSDS DS DS DS DS DS DSDSDSDS DSDSDSDS DS DS DS DS DS DS DS DSDS DSDS DS DSDS DS DS DSDSDSDS DS DSDS DS DS DS DS DS DS DS DS DS DS DS DS DSDS DS DS DS DS DSDS DSDSDSDSDSDSDS DS DS DS DSDSDSDS DS DSDSDS DS DS DSDS RAMP RAMP RAMP RAMP RAMP RAMP IP IP IP IP IP IP VTC RS RS IP IP IP LOC CF SF LOC CF SF SS CWA SSA SHEET NUMBER ISSUE DATE: DATE REVISION COMMENTS DESIGNED BY: CHECKED BY: DRAWN BY: PROJECT #: 1120 Lincoln Street, Suite 1000 Denver, Colorado 80203 P: 303.623.6300 F: 303.623.6311 HarrisKocherSmith.com Know what's below.Call before you dig. ®FILEPATH: K:\201013\ENGINEERING\EROSION\SWMP - INTERIM.DWG LAYOUT: LAYOUT16 XREFs: dhic logo, e-base, e-legal, e-util, keymap, stamp-dpPLOTTED: TUE 10/18/22 3:44:59P BY: MILES SUSTAD201013 ENCLAVE AT REDWOOD INTERIM TESC PLAN 4 4 OF 9 10-19-2022 CLH RCP CLH NO CHANGES ARE TO BE MADE TO THIS DRAWING WITHOUT WRITTEN PERMISSION OF HARRIS KOCHER SMITH.0 SCALE: 1" = 100 100 200 100' LOC CF SF VTC IP RS SP SS KEY MAP MATCHLINE - SEE THIS SHEET PRELIMINARYNOT FORCONSTRUCTIONMATCHLINE - SEE THIS SHEET Page: 61 Author: ACrecca Subject: Sticky Note Date: 10/31/2022 8:50:10 AM No EC measurer indicated along LOC containing SS Sewer service heading off site east to Lemay ave. Please verify if excavation or disturbance will occur in this area. DSDSDSDSDSDSDSDSDSDS DS DS DS DS DS DS DSDSDS DSDS DSDS DSDSDS DS DSDSDS DSDSDSDSDSDS DS DSDSDS DSDSDSDSDSDSDSDS DSDSDSDSDSDSDSDSDSDS DSDSDSDSDSDS DSDSDSDSDSDSDSDSDSDSDSDSDSDSDS DS DS DSRAMP SHEET NUMBER ISSUE DATE: DATE REVISION COMMENTS DESIGNED BY: CHECKED BY: DRAWN BY: PROJECT #: 1120 Lincoln Street, Suite 1000 Denver, Colorado 80203 P: 303.623.6300 F: 303.623.6311 HarrisKocherSmith.com Know what's below.Call before you dig. ®FILEPATH: K:\201013\ENGINEERING\DRAINAGE\DETENTION PLANS.DWG LAYOUT: POND310 XREFs: aerial[U], cd - drainage map labelling[U], dhi_logo, e-base, e-legal, e-offsite[U], e-util, p-base, p-legal[U], p-utilPLOTTED: WED 10/19/22 8:51:04A BY: RACHEL PATTON201013 ENCLAVE AT REDWOOD POND 3 PLAN 101 101 OF 140 10-19-2022 AML MAW JMR NO CHANGES ARE TO BE MADE TO THIS DRAWING WITHOUT WRITTEN PERMISSION OF HARRIS KOCHER SMITH.KEY MAP SCALE 1" = 500'REDWOOD STSUNIGA DR NORTHFIELDDEVELOPMENT0 SCALE: 1" = 30 30 60 30' 0 SCALE: 1" = 10 10 20 10' Page: 68 Author: ACrecca Subject: Sticky Note Date: 10/28/2022 11:49:25 AM Please provide details for LID (Underground Detention Systems) as well as erosion control notes for protecting LID's during instillation and construction