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Home My WebLink About84 Development Permit 450 Luther & Jones Butler St ConstructionPri1wipab P11ul J. Bur.\. Ill. l~l.. l.e"olir \\. Pillnliln. l!L . {;r<'~or.' S. St rn1i,l..a. Pl .l<111H'"' B. hni~hl. l~L . \,~·iatr' Ll"o<'.\ 0. hnopp '\anc~ Pa1T John T Bilno,i...1. H.l~L.S. Jim Galk~o.., Bury+ Pittman March 10 , 1998 Mr. Paul Kaspar City of College Station Development Review Department 1101 South Texas A venue College Station , Texas 77842 Re: Luther Street Roadway Improvement Revision Dear Paul: ll11r~ ~Pittman. In<'. <:om11lt111µ: Engineers/Sune~ors Yi 11 Ike CaH' Hoad/Suit(' 2<X> \11sti11. '((•\as 7H7Hi 'l\·I )12/"'i2H-<Xll I lit\ )12/'i21i-0)2) 111111.ln1r~ pilllllall.('Olll Attached are the Luther Street infrastructure revisions. We have modified the proposed Luther Street to transition down to a 24 foot pavement section in front of the Hughes, McCoy and Peterson tracts. In addition, we have rerouted the 16 inch waterline around these tracts. The attached plans illustrate the changes for the roadway and for the waterline . Jim Calloway, with the City of College Station, is familiar with the history behind these infrastructure changes and has requested that we send the revision to you for review . Please contact Joe Mulvihill or myself if you have any questions in regard to the roadway design and layout. Also attached is a copy of the drainage calculations ill u strating the capacity of the proposed 2: 1 concrete ditch on the north side of the roadway . Sincerely , cc: Joseph J . Mulvihill, P.E. -Bury & Pittman, Inc . Gary Garrison -Integroup, Inc. I : \ltrs\jgt\ 75 9-04 \KASP AR4 .doc \km\ 7 59-04 . 05 San Antonio Dallas \\ashinµ:ton , nc. Triangular Channel Analysis & Design Open Channel -Uniform flow Worksheet Name: luther Comment: Luther Street culvert analysis for taper Solve For Depth Given Input Data: Left Side Slope .. Right Side Slope . Manning's n ..... . Channel Slope ... . Discharge ....... . Computed Results: Depth ........... . Velocity ........ . Flow Area ....... . Flow Top Width .. . Wetted Perimeter. Critical Depth .. . Critical Slope .. . Froude Number ... . 2.00:1 (H:V) 2.00:1 (H:V) 0.013 0.0040 ft/ft 10.50 cfs 1. 08 ft 4.46 fps 2.35 sf 4.34 ft 4.85 ft 1.11 ft 0.0035 ft /ft 1.07 (flow is Supercritical) Open Channel Flow Module, Version 3.16 (c) 1 99 0 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 0 6 708 II Bury+Pittman Consulting Engineers and Surveyors TO City of College Station 1101 Texas Avenue College Station , Texas 77842 ATTN : Paul Kasper RE : Melrose Luther Street Changes WE ARE SENDING YOU : ___ Sh o p D rawin g s ___ Origina l D rawings _x ___ Pr in ts ___ Specifi cati o ns ___ Reports NUMBER LETTER OF TRANSMITTAL THESE ARE TRANSMITTE D : ___ As Req uested ___ Fo r Yo ur Use _X ___ F o r Review a nd Co mm e nt 1 Copy of the Luther Street infrastructure revision REMARKS DISTRIBUTION: PREPARED B Y: John G. Friedman ' Jr. If enclosures are not as noted, kind ly notify us at once . ~ Bu ry & Pittma n, Inc. 3345 Bee Caves Road , Sui te 200 Au stin, Texas 78746 T e l 5 12/328-00 11 Fax 5 12/328-0325 DATE March 11 , 1998 PROJE CT NUM BER 759-04 .Q1 DATA coDE Overnight ROUTIN G: ~ II DEVELOPMENT PERMIT PERMIT NO . 450 LUTHER AND JONES-BU1LER S1REET CONSTRUCTION FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: No Legal Description SITE ADDRESS: Not Addressed DEVELOPER: Integroup/Melrose Apartments of College Station, Ltd. Attn: Bill Mitchem 7077 Bonneval Road, Suite 600 Jacksonville, Florida 3 2216 DRAINAGE BASIN: White Creek and White Creek Tributary "B" TYPE OF DEVELOPMENT: This permit is valid for the construction of Luther and Jones-Butler Streets as shown on the approved plans. Contractor shall prevent silt and debris from leaving the site in accordance with the City of College Station Drainage Policy and Design Criteria Owner ancl/or contractor shall be responsible for any damage to existing city streets or infrastructure due to heavy machinery ancl/or equipment. In accordance with Chapter 13 of the Code of Ordinances of the City of College Station, measures shall be taken to insure that debris from construction, erosion, and sedimentation shall not be deposited in city streets , or existing drainage facilities . I hereby grant this permit for development of an area outside the special flood hazard area All development shall be in accordance with the plans and specifications submitted to and approved by the City Engineer in the development permit application for the above named project and all fthe codes and ordinances of the City of College Station that apply . Date 1 -23 -97 Date Contractor Date Project Description Project File Worksheet Flow Element Method Solve For Input Data West Luther Street -sta . 11 +41 .27 North Worksheet for Trapezoidal Channel L/N'e "B" c: \haestad\fmw\luth 11 s. fm2 rectangular channel Trapezoidal Channel Manning's Formula Channel Depth Mannings Coefficient 0 .030 Channel Slope 0 .031400 fUft Left Side Slope 3 .000000 H : V Right Side Slope 4 .000000 H : V Bottom Width 1.50 ft Dischar~e 9 .10 cf s Results Depth 0 .58 ft Flow Area 2 .06 ft2 Wetted Perimeter 5 .74 ft Top Width 5 .57 ft Critical Depth 0 .66 ft Critical Slope 0 .018381 fUft Velocity 4.43 fUs Velocity Head 0 .30 ft Specific Energy 0 .89 ft Froude Number 1.29 Flow is supercritical. 01/20/97 06:19:22 PM Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1666 FlowMaster v5 .13 Page 1 of 1 . - Project Description Project File Worksheet Flow Element Method Solve For Input Data West Luther Street -sta . 10+85.07 South Worksheet for Trapezoidal Channel L/l\/E '' .B -.z II c:\haestad\fmw\luth11 s.fm2 rectangular channel Trapezoidal Channel Manning's Formula Channel Depth Mannings Coefficient 0 .030 Channel Slope 0.031400 ft/ft Left S ide Slope 3 .000000 H : V Right S ide Slope 4 .000000 H : V Bottom Width 1.50 ft Dischar~e 5.00 cfs Results Depth 0.44 ft Flow A rea 1.32 ft2 Wetted Perimeter 4 .68 ft Top Width 4 .56 ft Critical Depth 0.49 ft Critical Slope 0 .019941 ft/ft Velocity 3 .78 ft/s Velocity Head 0 .22 ft Specific Energy 0 .66 ft Froude Number 1.24 Flow is supercritical. 01/20/97 06 :17:32 PM Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1666 FlowMaster v5 .13 Page 1 of 1 .. INTEGROUP-COLLEGE STATION MELROSE APARTMENTS WEST LUTHER STREET IMPROVEMENTS (@ END OF CURB IMPROVEMENTS) Drainage Calculations Using City of College Station Drainage Policy and Design Standards Rational Method Analysis Based on revised 30 foot wide pavement section Post-Developed Condition A. Runoff Coefficient (Table 111-1) Drainage Area No . C-1 & C-2 -Proposed Street Improvements Impervious Areas -Average Slope= 2.0 %, From Table C = 0 .90 Landscape Areas -Average Slope = 0.4 %, From Table C = 0.40 Composite C = 0 .65 Drainage Area No . C-1 & C-2 -Off-site Multi-Family Development High Density Res idential -Average Slope= 1 .0 %, From Table C = 0 .75 Composite C = 0 .75 B . Rainfall Intensity 1. Time of Concentration calculated using Table 111 -2 with slopes above Drainage Area C-1 through C-4 -720 feet draining over pavement at 1 .0 % (Half Street Width} From Manning's = 2.6 ft./sec . Time = 4 .60 Time of Concentration= 10 .00 2 . Rainfall Intensity calculated using Figure 111-1 (Inches/Hour) 5 Yr. Frequency 10 Yr. Frequency 25 Yr. Frequency 100 Yr. Frequency Drainage Area C-1a 7 .69 8 .63 9 .86 12 .60 C . Drainage Area Drainage Area C-1 Drainage Summary 0.42 Acres (Street) Drainage Summary Post-Developed Condition (cfs) 0 .75 Acres (Proposed Multi-Family Development) Subarea Tc (min .) 5 Yr. Frequency 10 Yr. Frequency 25 Yr. Frequency 100 Yr. Frequency Drainage Area C-1a 10 .00 6.4 7.2 8 .2 10 .5 Allowable Water Spread From City of College Station Fig . IV-3 With Slope= 1.17 % and Q(10) = 7 .2 cfs Calculated Depth = 5.25" Flooded Width = 11 .85' Criteria for West Luther St. (Collector) : One Twelve Foot Traffic Lane at the center of the street will remain clear. From Geometry : One Half Width of Street= 19 .5 Feet Clear Width = (19 .5 -11 .85) = 7 .65 Feet which is great than 6 foot minimum . Therefore street section is okay . • .,,.. .. ... ·-· .. . z ,., 1:v: 90 8~ 7_ s: I --5: a .J' -I- 3: ~ -- ~ 2: -· -!'"" ' --. -. . -~ --. . -.. ~ ,, -··~ 9 -~ 8 ; 1 --6 !I I "' -5 --- (/) "' ~ 4 -u I ~ -0 3 -..J -I -= ~ - a: ~ I ! I-2 I-- ~ (.!) - II - 0 --.. I -I I I I I I I .00 .002 .004 .ooe .008 .Ot ... = '5' 0.0l\"1 .02 .04 .06 :.a So .. = STREET· GRADE -FT. I FT.' FIGURE nl-3 ( N• 0.016) GUTTER FLOW CURVES FOR 39' STREET -7• PARABOLIC CROWN