1 PLL201607900 CSP Submittal No: 4 DE Comments 9/24/18 ......PRELIMINARY THIS DRAWING HAS NOT BEEN...
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BLOCK C2 5.44ac BLOCK C1 8.57ac BLOCK O1 2.95ac BLOCK C3 2.16ac BLOCK O4 4.37ac BLOCK O5 7.42ac BLOCK O6 5.51ac BLOCK O7 3.50ac BLOCK O3 4.92ac BLOCK O2 6.96ac BLOCK P1 2.43ac BLOCK P2 1.85ac BLOCK P3 1.02ac BLOCK R1 8.12ac BLOCK R2 2.81ac BLOCK R3 4.55ac BLOCK P4 0.22ac BLOCK 08 6.00ac BLOCK F1 9.29ac BLOCK F2 2.29ac PRELIMINARY DRAINAGE PLAN HORIZ. VERT. DESIGNED BY: DRAWN BY: CHECKED BY: SCALE DATE ISSUED: DRAWING No. SEAL FOR AND ON BEHALF OF MATRIX DESIGN GROUP, INC. PROJECT No. PREPARED BY: REFERENCE DRAWINGS FILE NAME: CTB FILE: PLOT DATE: THIS DRAWING IS CURRENT AS OF PLOT DATE AND MAY BE SUBJECT TO CHANGE. COMPUTER FILE MANAGEMENT No. DATE DESCRIPTION BY REVISIONS SHEET KEY N SHEET No. SHEET OF PRELIMINARY THIS DRAWING HAS NOT BEEN APPROVED BY GOVERNING AGENCIES AND IS SUBJECT TO CHANGE x-pp-bndy-Larkridge coordinate base X-PP-SITE exma X-PP-SITE-NE EXPN FRONT RANGE CROSSINGS NORTHEAST August 10, 2018 11:08:48 AM ---- R:\13.672.001 (Waitt-Thornton)\Dwg\Construction Plans\Storm\230-Cover Sheet -NE.dwg 1 3 DR01 N/A N/A AUGUST 2018 MAM FRD MAM ---- COVER SHEET FRONT RANGE CROSSINGS CONCEPTUAL SITE PLAN FRONT RANGE CROSSINGS 1
1 PLL201607900 CSP Submittal No: 4 DE Comments 9/24/18 ......PRELIMINARY THIS DRAWING HAS NOT BEEN APPROVED BY GOVERNING AGENCIES AND IS SUBJECT TO CHANGE x-pp-bndy-Larkridge coordinate
Incomplete legend. Revise Provide & differentiate storm sewer in legend and clarify line type in plans Differentiate storm sewer lines from contours, PLs, etc.
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Preliminary Drainage Plans are to include the responsible Professional Engineer’s (PE) number, signature and stamp on each sheet.
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Clearly show ex basin for roadway and identify where it is routed (Where does this go for detention? How is WQ being provided for the fronting roadway?)
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Clearly show ex basins for adj roadways and OS adjacent properties. identify where they is routed (TYP)
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reference/context for labels unclear. Revise/relocate location/label
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Clearly show ex basins for adj roadway and adjacent properties (TYP)
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Piped Preble Creek and storm sewer? Clarify what this is and label w/ pipe info
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are these existing or proposed? Verify correct/consistant line types are used throughout plans (TYP)
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Historic Drainage Pattern Sheet: • Cleary show and label city of Thornton boundary (where applicable). • Existing Major drainage boundaries and sub-boundaries and 100-year flow rates including flow direction arrows. • Existing irrigation ditches and ponds. • Existing drainageways including 100-year flow rates or water surface elevations. • Provide additional contour labels and differentiate major and minor contours • Show property lines and label properties
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does not correspond to plan
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does used in this plan?
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Missing in legend
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differentiate and apply to plans
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Clarify basin boundaries. Inconsistent/unclear line work (TYP)
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Where does this go? Show proposed outfall to drainageway (TYP) Is it tied to and accounted for in downstream detention and water quality? That is not clear from this plan nor report.
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Provide letter from property acknowledging that they are willing to grant easements for the outfall and potential overflows prior to CSP approval
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missing other applicable existing basins
E. 160th AVE
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E. 162nd AVE
E. 164th AVE
E. 164th AVE
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PRELIMINARY DRAINAGE PLAN
HORIZ.
VERT.
DESIGNED BY:
DRAWN BY:
CHECKED BY:
SCALE
DATE ISSUED: DRAWING No.
SEAL
FOR AND ON BEHALF OF
MATRIX DESIGN GROUP, INC.
PROJECT No.
PREPARED BY:
REFERENCE
DRAWINGS
FILE NAME:
CTB FILE:
PLOT DATE:
THIS DRAWING IS CURRENT AS OF PLOT DATE AND MAY BE SUBJECT TO CHANGE.
Incomplete legend. Revise to provide complete line work from plan Differentiate and clarify line work in plans (ex. & proposed storm sewer, contours, PLs, etc.)
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Preliminary Drainage Plans are to include the responsible Professional Engineer’s (PE) number, signature and stamp on each sheet.
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TYPCIAL - WD/detention required also for frontage roadways. Identify if and where that is being directed/provided if already being provided elsewhere. What is to be provided and where for the HYW7 and 160th improvements? (permanent or even interim for area adjacent to future developments). Identify all stubs for future development tie-ins. provide missing basin info. (Clearly show the adj roadway basins and OS tributary basins, and other applicable basins.)
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REPEAT/See CSP cklist
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What about basin and routing for the roadway (South and north sides)? TYP - Clearly show basins for roadway and identify where it is routed (detention and WQ required for roadway frontage improvements. How/where will this be provided?)
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does used in this plan?
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line type Missing in legend
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differentiate and apply to plans
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Missing Basins. what about frontage roadway basins, offsite basins, etc? Include Also, provide basin summary table based on future land use flows and UDFCD. (How are the developed basin flows less than the historic.)
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Turn off these planning lines. (TYP)
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TYPICAL - Remove/turn off internal proposed storm sewer, water mains, planning areas, etc. Internal utility layout is not part of nor reviewed with the CSP and associated preliminary plans.
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Is Bull canal being piped to allow for grading as shown? Revise grading/basins. Identify crossing
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TYPICAL: Show & label existing storm and clarify what is proposed What is proposed here with pipe to the west?
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What about WQ? other offsite future tributary basins will need to be accounted for in the design of this outfall to the existing pond. (72" is prliminary and will need to be evaluated further with CDs and FDR)
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WQ Pond?
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basin goes where?
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move/reduce label to provide visible design info
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How/where will this pond outfall? Clarify on plan
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clean up drawings (TYP)
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-Differentiate between major and minor contours. -1' or 2' contour intervals (Show contours for all offsite tributary flow -Provide additional contour labels -Clearly label major and minor contours -Remove all planning areas line-work -Clarify how detention and water quality are provided for the perimeter roadways and site. (This is to be accounted for with the development in accordance with the stds & specs and MS4 permit requirements.) Incomplete drainage map information. Revise to include, but not be limited to the following:
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-Clarify/provide basin boundaries for tributary areas, including roadways adj to the development and off site tributary basins, including those that are to connect to the outfall pipe -Include basin IDs and in Basin summary table -identify future land use types -Clearly label drainageways/tributaries -Show and label ROW -Clearly show property lines and label properties -The existing storm sewer system the development is proposing to utilize is to be shown and labeled with the size, as-built slope and type of pipe.
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how are detention and WQ provided for south side of roadway? Show basin, account for, and quantify flows
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Generally show proposed roadway improvements (TYP)
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box culvert? identify
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Basin info? goes where? (TYP)
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Ex. or proposed? Either way, appears that this needs to be reconfigured/re-routed to meet detention & WQ requirements (and in accordance w/ MS4 permit requirements) verify other assumptions/locations as well.
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reference/context for labels unclear. Revise/relocate location/label
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future land-use zoning matters for utilities, drainage and traffic, not existing. See comments (TYP)
