STATE ROUTE 73 PILOT STUDIES
BMP Type and Status by Basin
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Detention Basins with Bypass Operation
Basin Inlet Type Outlet Type Bypass/Overflow Type % WQV Treated Monitoring Type2 Monitoring Period (minimum) BMP Status
883L Energy Dissipator Perforated Riser Bypass 75% WQ, O&M WQ: Nov-03 - May -06
O&M: Nov-03 - May 06
Constructed
893L Energy Dissipator Perforated Riser Bypass 50% WQ, O&M WQ: Nov-03 - May -06
O&M: Nov-03 - May 06
Constructed
922R East Energy Dissipator Perforated Riser Bypass 25% WQ, O&M WQ: Nov-03 - May -06
O&M: Nov-03 - May 06
Constructed
930L Energy Dissipator Perforated Riser Bypass 100% WQ, O&M WQ: Nov-03 - May -06
O&M: Nov-03 - May 06
Constructed

Detention Basins with Overflow Operation
Basin Inlet Type Outlet Type Bypass/Overflow Type % WQV Treated Monitoring Type2 Monitoring Period (minimum) BMP Status
922R West Energy Dissipator/ Concreted RSP Perforated Riser Overflow 50% WQ, O&M WQ: Nov-03 - May -06
O&M: Nov-03 - May 06
Constructed
1032R Concreted RSP Perforated Riser Overflow 25% WQ, O&M WQ: Nov-03 - May -06
O&M: Nov-03 - May 06
Constructed
1137L Concreted RSP Perforated Riser Overflow 75% WQ, O&M WQ: Nov-03 - May -06
O&M: Nov-03 - May 06
Constructed
1143L Concreted RSP Perforated Riser Overflow 100% WQ, O&M WQ: Nov-03 - May -06
O&M: Nov-03 - May 06
Constructed

Detentions Basin with Outlet Skimmers
Basin Inlet Type Outlet Type Bypass/Overflow Type % WQV Treated Monitoring Type2 Monitoring Period (minimum) BMP Status
780R Energy Dissipator/ Concreted RSP Skimmer Overflow 50% WQ, O&M *WQ: Oct-05 - May -08 Design
            O&M: Feb-05 - May 08  
808R Energy Dissipator/ Concreted RSP Skimmer Overflow 25% WQ, O&M *WQ: Oct-04 - May -07
O&M: Nov-03 - May 07
Constructed
859L Energy Dissipator Skimmer Overflow 100% WQ, O&M *WQ: Oct-04 - May -07
O&M: Nov-03 - May 07
Constructed
878R Energy Dissipator/ Concreted RSP Skimmer Overflow 75% WQ, O&M *WQ: Oct-04 - May -07
O&M: Nov-03 - May 07
Constructed

Detention Basins with Hold & Release Outlets
Basin Inlet Type Outlet Type Bypass/Overflow Type % WQV Treated Monitoring Type2 Monitoring Period (minimum) BMP Status
457L Energy Dissipator Hold and Release Overflow 50% WQ, O&M *WQ: Oct-04 - May -07
O&M: Nov-03 - May 07
Constructed
535L Concreted RSP Hold and Release Overflow 100% WQ, O&M *WQ: Oct-04 - May -07
O&M: Nov-03 - May 07
Constructed
613L Energy Dissipator/ Concreted RSP Hold and Release Overflow 75% WQ, O&M *WQ: Oct-04 - May -07
O&M: Nov-03 - May 07
Constructed
654R Concreted RSP Hold and Release Overflow 25% WQ, O&M *WQ: Oct-04 - May -07
O&M: Nov-03 - May 07
Constructed

Detention Basins with Alternative Inlet Devices
Basin Inlet Type Outlet Type Bypass/Overflow Type % WQV Treated Monitoring Type2 Monitoring Period (minimum) BMP Status
1076R GSRD Perforated Riser --- NA1 GS GS: Nov-03 - May-06 Constructed
1081L GSRD Perforated Riser --- NA1 GS GS: Nov-03 - May-06 Constructed

Gross Solids Removal Devices with Sediment Traps
Basin Inlet Type Outlet Type Bypass/Overflow Type % WQV Treated Monitoring Type2 Monitoring Period (minimum) BMP Status
630L GSRD --- --- NA1 GS GS: Nov-04 - May-07 Design
1085L GSRD --- --- NA1 GS GS: Oct-03 - May-06 Constructed
1180R GSRD Perforated Riser Overflow NA1 GS GS: Oct-03 - May-06 Constructed

Bioretention Basin
Basin Inlet Type Outlet Type Bypass/Overflow Type % WQV Treated Monitoring Type2 Monitoring Period (minimum) BMP Status
1149L GSRD Underdrain Overflow 100% WQ, O&M, GS WQ: Oct-05 - May -08
O&M: Oct-05 - May 08
GS: Oct-05 - May-08
Design

Austin-type Sand Filters
Basin Inlet Type Outlet Type Bypass/Overflow Type % WQV Treated Monitoring Type2 Monitoring Period (minimum) BMP Status
506R
(Partial Sedimentation)
Energy Dissipator/ Concreted RSP Underdrain Overflow 100% WQ, O&M WQ: Oct-05 - May -08
O&M: Oct-05 - May 08
Design
1183L
(Partial Sedimentation)
Energy Dissipator/ Concreted RSP Underdrain Overflow 100% WQ, O&M WQ: Oct-05 - May -08
O&M: Oct-05 - May 08
Design
1194R
(Full Sedimentation)
Energy Dissipator/ Concreted RSP Underdrain Overflow 100% WQ, O&M WQ: Oct-05 - May -08
O&M: Oct-05 - May 08
Design

1 Sized for estimated annual volume of gross solids
2 WQ = Water Quality Monitoring, O&M = Operation and Maintenance Evaluation, GS = Gross Solids Monitoring
* Operational monitoring will be performed during the first year of operation. Based on operational performance, Caltrans will decide if water quality monitoring is justified during the subsequent monitoring seasons


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