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AREA
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
AREA
(ACRES)
076
093
1.03
1.48
0.46
0.41
1.59
1.00
1.12
046
0.86
0.78
099
0.67
1.50
068
0.90
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0.75
0.75
0.75
0.75
075
075
075
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
075
DRAINAGE AREA
CHART
TIME
(MIN.)
10.0
10.0
10.0
10.0
10.0
100
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
I 100
(IN/HR. )
11.0
11.0
110
11.0
110
11.0
11.0
11.0
11.0
11.0
11.0
11.0
11.0
11.0
110
110
11.0
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(CFS)
6.30
7.70
8.51
12.22
3.76
3.40
13.09
8.28
9.26
3.77
7.10
6.45
8.15
5.55
12 36
5.57
7.43
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NOTE BUILDING DRAINS TO CONNECT TO UNDERGROUND STORM SEWER SYSTEM
~
EROSION CONTROl GENERAL NOTES
1 ALL EROSION CONTROL DEVICES SHALL BE INSTALLED WITH THE FIRST PHASE
OF CONSTRUCTION AND SHALL REMAIN IN PLACE UNTIL FINAL GRADING AND
PAVING IS COMPLETE. A STAND OF GRASS IS ESTABLISHED AND 707. COVERAGE IS ACHIEVED
2 CONSTRUCTION OPERATIONS SHALL BE MANAGED SO THAT AS MUCH OF THE
SI TE AS POSSIBLE IS LEFT COVERED WI TH TOPSOIL AND VEGETATION
3. ALL GRADED AREAS MUST BE PERMANENTLY STABILIZED IMMEDIA TEL Y FOLLOWING
FINISH GRADING
4 THE CONTRACTOR SHALL COMPL Y WITH ALL FEDERAL. STATE, AND LOCAL
EROSION, CONSERVATION, AND SILTATION ORDINANCES. THE CONTRACTOR
SHALL REMOVE ALL TEMPORARY EROSION CONTROL DEVICES UPON
COMPLETION OF PERMANENT DRAINAGE AND THE ESTABLISHMENT OF A
STAND OF GRASS SUFFICIENT TO PREVENT EROSION
5 THE CONTRACTOR MUST USE SEDIMENT FILTERS OR OTHER MEASURES APPROVED
BY THE ENGINEER AND CONSTRUCTION MANAGER TO PREVENT SILT AND
CONSTRUCTION DEBRIS FROM CLOGGING STORM SEWER PIPES OR PRO
POSED OR EXISTING INLETS. OR FROM BEING TRANSPORTED TO ADJACENT PROPERTIES.
6 CONSTRUCTION ENTRANCE
MINIMUM SIZE STONE 2" DIAMETER
THICKNESS: NOT LESS THAN 6"
\.ENGTH: NOT LESS THAN 50'
.w!D.lli.. NOT LESS THAN FULL WIDTH OF ALL POINTS OF INGRESS AND EGRESS
MAINTENANCE REQUIREMENTS; AS NECESSARY TO PREVENT TRACKING OR
FLOWING MUD INTO PUBLIC RIGHT -OF -WA Y OR PARKING AREAS
7 PLACE FILTER BARRIER AROUND ALL PROPOSED GRATE AND CURB INLETS DURING
CONSTRUCTION
II
8 SITE ENTRY AND EXIT LOCATIONS SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT
TRACKING OR FLOWING OF SEDIMENT ONTO PUBLIC ROADWAYS. ALL SEDIMENT SPILLED.
DROPPED. WASHED OR TRACKED ON A PUBLIC ROADWAY MUST BE REMOVED IMMEDIATELY.
WHEN WASHING IS REQUIRED TO REMOVE SEDIMENT PRIOR TO ENTRANCE TO A PUBLIC ROADWAY,
IT SHALL BE DONE ON AN AREA STABILIZED WITH CRUSHED STONE WHICH DRAINS INTO AN
APPROVED SEDIMENT BASIN ALL FINES IMPOSED FOR TRACKING ONTO PUBLIC ROADS SHALL BE
PAID BY THE CONTRACTOR
9 MAINTENANCE. EROSION CONTROLS SHALL BE REPAIRED OR REPLACED AS INSPECTION DEEMS
NECESSARY, OR AS DIRECTED BY THE OWNER'S REPRESENTATIVE ACCUMULATED SILT IN ANY
EROSION CONTROL DEVICE SHALL BE REMOVED AND SHALL BE DISTRIBUTED ON SITE IN A
MANNER NOT CONTRIBUTING TO ADDITIONAL SILTATION
10. THE CONTRACTOR IS RESPONSIBLE FOR REESTABLISHING ANY EROSION CONTROL DEVICE WHICH
THEY DISTURB. EACH CONTRACTOR SHALL NOTIFY THE OWNER'S REPRESENTATIVE OF ANY
DEFICIENCIES IN THE ESTABLISHED EROSION CONTROL MEASURES WHICH MAY LEAD TO UNAUT-
HORIZED DISCHARGE OR STORM WATER POLLUTION. SEDIMENTATION OR OTHER POLLUTANTS
UNAUTHORIZED POLLUTANTS INCLUDE. BUT ARE NOT LIMITED TO, EXCESS CONCRETE DUMPING
OR CONCRETE RESIDUE, PAINTS. SOL VENTS, GREASES, FUEL AND LUBE OIL, PESTICIDES, AND
SOLID WASTE MATERIALS
11 THE CONTRACTOR SHALL MAINTAIN ADEQUATE SITE DRAINAGE DURING ALL PHASES OF CONSTRUCTION
THE CONTRACTOR SHALL USE FILTER BARRIER (OR OTHER METHOD APPROVED BY THE ENGINEER AND
CITY) AS REQUIRED TO PREVENT SILT AND CONSTRUCTION DEBRIS FROM FLOWING ONTO ADJACENT
PROPERTIES CONTRACTOR SHALL COMPLY WITH ALL APPLICABLE FEDERAL. STATE. OR LOCAL EROSION,
CONSERVATION. AND SILTATION ORDINANCES CONTRACTOR SHALL REMOVE ALL TEMPORARY EROSION
CONTROL DEVICES UPON COMPLETION OF PERMANENT DRAINAGE FACILITIES AND THE ESTABLISHMENT
OF A STAND OF GRASS OR OTHER GROWTH TO PREVENT EROSION
\~~_.
//-
/
12 THE CONTRACTOR SHALL CONSTRUCT fiLTER BARRIER. STRAW BALES OR OTHER APPROVED DEVICES PRIOR
TO CONSTRUCTION TO PREVENT ADVERSE OFF SITE IMP ACT OR STORM WATER QUALITY AND AS
REQUIRED BY THE CITY OF COlLEGE STATION. CONTRACTOR IS RESPONSIBLE FOR PROPER MAINTENANCE OF
THE REQUIRED EROSION CONTROL DEVICES THROUGHOUT THE ENTIRE CONSTRUCTION PROCESS
13 CONTRACTOR IS RESPONSIBLE FOR REMOVING ALL SILT AND DEBRIS OFF SITE FROM THE EXISTING
ROADWAYS AND PROJECT SITE THAT ARE A RESULT OF THE PROPOSED CONSTRUCTION AS REQUESTED
BY STATE. COUNTY, OR CITY AGENCIES
14. CONTRACTOR IS TO CONSTRUCT A STABILIZED CONSTRUCTION ENTRANCE AT ALL PRIMARY POINTS OF ACCESS
CONTRACTOR IS RESPONSIBLE FOR INSURING THAT ALL CONSTRUCTION TRAFFIC UTILIZES
THE STABILIZED ENTRANCE AT ALL TIMES FOR INGRESS/EGRESS TO THE SITE
15 THE CONTRACTOR SHALL TAKE ALL AVAILABLE PRECAUTIONS TO CONTROl DUST CONTRACTOR SHALL
CONTROL DUST BY SPRINKLING WATER, OR BY OTHER MEANS APPROVED BY THE CITY AND ENGINEER.
A T NO ADDITIONAL COST TO THE OWNER
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16 BEFORE ANY EARTHWORK IS DONE. THE CONTRACTOR SHALL STAKE OUT AND MARK THE LIMITS OF
CONSTRUCTION AND OTHER ITEMS ESTABLISHED BY THE PLANS. THE CONTRACTOR SHALL PROTECT
AND PRESERVE CONTROL POINTS AT ALL TIMES DURING THE COURSE OF THE PRO.ECT THE GRADING
CONTRACTOR SHALL PROVIDE ALL NECESSARY ENGINEERING AND SURVEYING FOR LINE AND GRADE
CONTROL POINTS RELATED TO EARTHWORK.
17 THE CONTRACTOR SHALL SALVAGE AND PROTECT ALL EXISTING POWER POLES, SIGNS. MANHOlES.
TELEPHONE RISERS, WATER VALVES. ETC DURING ALL CONSTRUCTION PHASES UNLESS
NOTED OTHERWISE.
18 THE CONTRACTOR SHALL CLEAR AND GRUB THE SITE AND PLACE. COMPACT, AND MOISTURE
CONDITION ALL FILL PER THE GEOTECHNICAL ENGINEER'S SPECIFICATIONS. ANY FILL MATERIAL TO
BE USED SHALL BE APPROVED BY THE GEOTECHNICAL ENGINEER PRIOR TO PLACEMENT
-""
19 GRADING CONTRACTOR TO COORDINATE WITH THE UTILITY COMPANIES FOR ANY REQUIRED
UTILITY ADJUSTMENTS AND/OR RELOCATIONS
20 CONTRACTOR STAGING AREA TO BE AGREED UPON BY OWNER PRIOR TO CONSTRUCTION.
.
LEGEND
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SILT FENCE
DRAINAGE AREA ACREAGE
STORMWATER FLOW (cfs)
STABILIZED CONSTRUCTION ENTRANCE
INLET PROTECTION
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C-6
. OF 18