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Permit Review Detail
Review Status: Completed
Review Details: RESUBMITTAL - GRADING ALL
Permit Number - T07BU00215
Review Name: RESUBMITTAL - GRADING ALL
Review Status: Completed
| Review Date | Reviewer's Name | Type of Review | Description | Status | Comments |
|---|---|---|---|---|---|
| 01/14/2008 | JASON GREEN | ENGINEERING | REVIEW | Denied | DATE: January 24, 2008 SUBJECT: Las Nubes Grading Plan- 2nd Engineering Review TO: Jeffrey Stanley, P.E. LOCATION: 2740 W Goret Road, T13S R13E Sec33 Ward 1 REVIEWER: Jason Green, CFM ACTIVITY: T07BU00215 SUMMARY: Engineering Division of Development Services Department has received and reviewed the revised grading plan, Stormwater Pollution Prevention Plan (Stanley Engineering and Drainage, Inc., 03JAN08) and Geotechnical Report for the above referenced property. Engineering Division does not recommend approval of the grading plan at this time. The following items need to be addressed: GRADING PLAN COMMENTS: 1) Provide a copy of the last approved Tentative Plat (S06-050). The grading plan will not be approved until verification that all details, locations, dimensions, and plan profiles match the approved Tentative Plat. Provide all information associated with the Tentative Plat and the additional information that is required on the grading plan that will be used as the construction document. 2) DS Sec.11-01: Provide general grading notes, including a grading/drainage note specifying conformance with City of Tucson Development Standard 11-01.0 (excavation and grading requirements). 3) Tucson Code Chapter 26.Sec26-11: Provide a Floodplain Use Permit (FUP) at grading plan resubmittal for the placement of fill and the proposed culverts within the floodplain and erosion hazard area as shown on the Tentative Plat. A FUP is required prior to grading plan approval. This comment was not addressed from the last comment letter. 4) Revise the grading plan to label and dimension invert protection for the proposed culverts. Due to the angle of the corrugated metal pipes (CMPs) within the centerline of the flow channel erosion around the invert of the pipe is expected. Provide concrete wing walls with a concrete toe down for erosion protection of the invert of the proposed CMPs due to the velocities shown in the drainage report. Provide details on the grading plan that show all dimensions, angles, thickness, etc for construction purposes. 5) Revise the profile of the proposed roadway at station 3+71.43. The road profile shows a low spot in the middle of the inverted crown roadway that must be revised to show how the water is drained from the roadway. The roadside drainage must be designed to prevent erosion to the roadbed and/or the adjacent properties and must be designed so that the 10-year flow is contained under any proposed pedestrian walkways. 6) Revise the grading plan to show erosion protection at the outlet of the larger sized culverts (specifically the 48-inch CMP). Due to the angle of the culvert within the centerline of the wash the outlet velocity is directed right at the embankment of a protected hillside that must be armored to prevent undermining of the slope and re-channelization of the wash. 7) Revise the grading plan to show all roadside drainage and how this stormwater is being collected and diverted to a main channel without causing damage to the proposed roadway or any adjacent property. Per the proposed grading plan there are existing drainage channels that are being cut off by the construction of the road. All small tributaries must be collected as roadside drainage and deposited into main channels with out causing erosion to the main channel or the road itself. 8) Revise the grading plan and the location of the 24-inch CMP at the east-end of Black Cloud Court. The proposed invert of the pipe does not fall within the flow line of the channel at the road location. The grading plan must show how the water is collected into the invert of the pipe without causing erosion to the roadway or adjacent properties. 9) Revise the profile of the proposed roadway at station 12+50.00. The road profile shows a low spot in the middle of the inverted crown roadway that must be revised to show how the water is drained from the roadway. The road drainage must be designed to prevent erosion to the roadbed and/or the adjacent properties and must be designed so that the 10-year flow is contained under any proposed pedestrian walkways. 10) Revise the profile of the proposed roadway at station 1+50.00. The road profile shows a low spot in the middle of the inverted crown roadway that must be revised to show how the water is drained from the roadway. The road drainage must be designed to prevent erosion to the roadbed and/or the adjacent properties and must be designed so that the 10-year flow is contained under any proposed pedestrian walkways. 11) Revise all of the culvert cross sections on Sheet 4 to clearly show all dimensions, erosion protection, invert elevations, water surface elevations, Q100 discharge values, and a profile view showing limits of riprap around the proposed culvert, wing wall locations, required cut off wall, etc. 12) Revise Cross section 2 on Sheet 4 and the call out detail for the proposed depressed curb. Standard Detail 209 as referenced is not for depressed curbs, provide a new detail or a modified detail showing all construction related dimensions and labels. 13) Revise the grading plan to show the location for cross section 1 in plan view. Provide the numbered cross section in plan view for easier review. 14) Further comments may be generated upon resubmittal of the grading plan and approved Tentative Plat. DRAINAGE REPORT: 15) DS Sec.10-02.11.4.2.1: Revise the grading plan and details to provide for inlet protection of the larger CMPs. Due to the location and angle of the culvert at the flow line of their channels inlet control is required to protect the culvert, riprap and roadway from erosion. Provide a concrete wing wall design at the culvert inlets so that the velocity of the stormwater does not undermine the proposed culvert. 16) DS Sec.10-02.11.4.2.2: Revise the grading plan and detail to provide for outlet protection at the embankment for the proposed 48-inch CMP. The proposed culvert is angled so that the velocity coming out of the culvert is directed right at the embankment of a hill slope that must be protected from erosion. Provide a discussion on the erosion protection with calculation for rock rip rap size. 17) Provide a discussion with calculations for all required roadside drainage channels that must be constructed to prevent erosion to the proposed roadway and existing channels. STORMWATER POLLUTION PREVENTION PLAN: The SWPPP does not meet the minimum requirements of the AzPDES Construction General Permit (CGP). Revise the SWPPP according to the following comment: 18) Part IV.C.3.b: Identify on the SWPPP exhibit all areas of soil disturbance, and clearly identify on the exhibit the areas not to be disturbed. 19) Part IV.J.1: The Operator must sign the SWPPP certification form provided within the SWPPP report prior to SWPPP approval. GENERAL COMMENTS: Please provide the approved Tentative Plat, revised grading plan, Drainage Report, and SWPPP at re-submittal. The revised grading plan, Drainage Report, and SWPP must address the comments provided above. Include a comprehensive response letter addressing in detail responses to all of the above comments. Please enclose "redlines" with the resubmittal package for reference. If you have any questions, I can be reached at 837-4929. Jason Green, CFM Senior Engineer Associate Engineering Division Development Services |
| 01/18/2008 | ANDREW CONNOR | NPPO | REVIEW | Denied | Submit a copy of the approved tentative plat including landscape and native plant preservation plans for reference. The grading application will be reviewed for compliance only when the approved documents are included in the submittal. Revise grading plans as necessary to comply with the approved tentative plat. |
| 01/29/2008 | CPIERCE1 | ZONING | REVIEW | Needs Review |