05__Draft_PWS_Sources_Sought_1.pdf

PERFORMANCE WORK STATEMENT (PWS)

Truckee Basin Water Management Options Pilot Study—Hydrology and Hydraulic Analyses Contract May 2021

1.0 Scope

1.1 Objective

The objective of this Performance Work Statement (PWS) is to define the tasks and deliverables for the Contractor to complete the Reclamation Truckee Basin Water Management Options Pilot Study Hydrology and Hydraulic analyses.

1.2 Background

The purpose of this contract is to provide hydrology and hydraulic analyses to support the Truckee Basin Water Management Options Pilot (WMOP) study. The hydrology analyses needed for the WMOP study are Rain and Snowmelt Flood Frequency Curve Updates. The hydraulic analyses needed for the WMOP study are hydraulic model calibrations & validations and a Channel Capacity Analysis with inundation mapping. Further detail is provided below.

1.2.1 Truckee Basin Water Management Options Pilot Study

The Truckee River Basin encompasses about 3,060 square miles in California and Nevada. Water in the basin originates high in the Sierra Nevada mountains at elevations over 10,000 feet. The Truckee River flows approximately 121 miles from the outlet of Lake Tahoe to its terminus at Pyramid Lake. While 90% of the flow and virtually all of the Basin’s water storage lie in California, the vast majority of water demands are in Nevada.

There are three Reclamation Projects within the WMOP study area: the Washoe Project (Stampede and Prosser dams and reservoirs), the Newlands Project (Lake Tahoe Dam, Derby Dam, the Truckee Canal and Lahontan Dam and Reservoir), and the Truckee Storage Project (Boca Dam and Reservoir). There are three other dams within the Truckee Basin: Donner and Independence Lake dams which are owned and operated by Truckee Meadows Water Authority for water supply, and Martis Creek Reservoir which is owned and operated by the U.S. Army Corps of Engineers exclusively for flood control purposes.

Drought and flooding are becoming more common in the Truckee Basin. The extreme variability from year to year in terms of winter precipitation, snowpack, and runoff make it very challenging for water managers, including Reclamation and the Non-Federal Partners, to adapt and plan for water supplies due to how federally owned storage reservoirs must be operated for flood risk reduction. Even in large runoff years in the Truckee Basin, the same flood control diagrams (i.e., rule curves) and snowmelt parameters can often prevent filling into the flood space until it is too late in the season. Oftentimes, during years with significant snowpack, by the time filling is finally allowed into the flood storage space (based on the high snowmelt parameters) the runoff has receded to a level that some reservoirs aren’t always able to be filled to capacity.

Flood and reservoir refill operations are governed by the Water Control Manual for the Truckee River Basin Reservoirs Truckee River, Nevada and California (1985) issued by the US Army Corps of Engineers (USACE).

The manual suffers from outdated rule curves, inflexible storage requirements, constrained reservoir release thresholds, and a constrained downstream regulation goal at Reno. It also does not reflect the Truckee River Operating Agreement (TROA), flood mitigation projects completed in Reno and Sparks since 1985, the crest raise at Reclamation’s Stampede Dam, or the parapet wall added to Reclamation’s Prosser Dam.

The purpose of the Truckee Basin WMOP study is to develop flexible flood risk reduction criteria without increasing downstream flood risk. The WMOP study will evaluate Forecast Informed Reservoir Operations, flexible rule curves, and changes to downstream regulation goals. The reservoirs Processor, Boca, Stampede and Martis governed by the Water Control Manual could benefit from the advanced flexible operations. This WMOP study will then be documented in a Viability Assessment document and provided to the USACE for a subsequent update to the Water Control Manual.

The hydrology and hydraulic analyses proposed in this PWS will support the Truckee Basin WMOP study. The above paragraphs about the WMOP study provide background for this PWS. The following subsubsections Rain and Snowmelt Flood Frequency Curve Updates and Channel Capacity Analysis provide the context for the tasks in this PWS.

1.2.2 Rain and Snowmelt Flood Frequency Curve Updates

The original rain and snowmelt flood frequency curves are found in the 1985 Water Control Manual. The unregulated rain and snowmelt frequency curves were developed for the following locations: Boca Reservoir, Prosser Reservoir, Martis Reservoir, Truckee River at Farad, and Truckee River at Reno. Stampede Reservoir’s rain and snowmelt flood frequency curves were not developed in the 1985 Water Control Manual because Stampede and Boca Reservoirs are in series and share flood storage allocation proportionally between the reservoirs. The Boca Reservoir is downstream of Stampede Reservoir and they do not have much local inflow in between and share similar drainage areas. The datasets used to develop these rain and snow flood frequency curves include the period from 1901 to 1983.

The rain and snowmelt flood frequency curve updates are needed to add flow records (~37 years) to the previously performed analysis by the USACE. The fitted probability distribution function used for flood frequency curve development is subject to uncertainty without a substantial stream flow record length. The additional years of flow records will help reduce the uncertainty of the rain and snowmelt flood frequency curves.

1.2.3 Channel Capacity Analysis

Substantial work has already been done to develop hydraulic models that simulate the Truckee Meadows area (West Reno to Vista gage) and the Vista gage to Wadsworth gage reach of the Truckee River. The hydraulic models are based on the Hydrologic Engineering Center (HEC)-River Analysis System (RAS). The Truckee Meadows area model is a full 2D model with both steady and unsteady state conditions. The Vista gage to Wadsworth gage model is a 1D model with steady state conditions that can be converted to unsteady flow with updated hydrology. The HEC-RAS models developed are currently being used for a Federal Emergency Management Agency (FEMA) Physical Map Revision with the 1% annual chance exceedance flow as the focus.

The hydraulic models will need to be calibrated and validated for flows around 6,000 cfs for this analysis. As part of the FEMA analysis, the Truckee Meadows area model was compared to high water marks during the 2006 event which was approximately 14,000 cfs (roughly a 50 year event). The current model is run with diffusion wave equations under the RAS 6.0.X Beta 3 release with roughness and other parameters calibrated against high water marks. Diffusion wave is used over full momentum because it had better performance especially around bridges and in wide floodplain spreading situations. The Vista to Wadsworth model is run under a 1D steady flow conditions to meet FEMA guidelines for mapping.

The Reno gage is a control point of interest for the Truckee Basin WMOP study because the current Water Control Manual adheres to a target (control) of 6,000 cfs at the Truckee River at Reno gage. If modeling results show a greater capacity exists, the control of 6,000 cfs could be adjusted higher and allow for more flexibility in operation of the reservoirs. The analysis will include inundation maps for flows incrementing from 6,000 cfs to 14,000 cfs at the Truckee River at Reno gage. The Channel Capacity Analysis will serve to identify the channel capacity, limiting cross sections, and breakout points for the Truckee Meadows area and Vista gage to Wadsworth gage reach.

2.0 References & Materials

The following documents shall be provided to the Contractor:

(1) Water Control Manual - Truckee River Basin Reservoirs Truckee River, Nevada and California (1985)

(2) Truckee Meadows General Reevaluation Report Truckee River, Nevada - Attachment A Hydrology Report (2012)

(3) Engineer Manual 1110-2-1415 Hydrologic Frequency Analysis (1993)

(4) Guidelines for Determining Flood Flow Frequency Bulletin 17C (2019)

(5) HEC-SSP Statistical Software Package User’s Manual

(6) TRFMA’s HEC-RAS model documentation

(7) Technical Service Center Manuals and Standards: Flood Inundation Mapping (2019)

(8) Reclamation’s Visual Identity Guidelines for Publications, Reports and Template

(9) Comment tracking spreadsheet

The following models shall be provided to the Contractor:

(1) Truckee Meadows area 2D HEC-RAS model

(2) Vista gage to Wadsworth gage reach 1D HEC-RAS model

3.0 Tasks

The Contractor shall perform the following tasks for the Bureau of Reclamation (Reclamation), Lahontan Basin Area Office (LBAO) to support the Truckee Basin WMOP study. These tasks include rain and snowmelt flood frequency curve updates and channel capacity analysis.

3.1 Task 1 – Project Management and Administrative

(1) The Contractor shall conduct all managerial and administrative duties to manage this contract. This includes project management and oversight of contractor activities, staff, and resources.

(2) The Contractor shall develop a Project Management Plan which includes the tasks and deliverables schedule for discussion, no later than one (1) month after contract award, ensuring all appropriate tasks and predecessors are identified. The schedule should identify milestones for each product. This schedule will be revisited at least monthly and updated as needed.

(3) The Contractor shall prepare and submit monthly status reports and invoices.

3.2 Task 2 – Meetings

The Contractor shall participate in meetings as necessary. The meeting frequency and participants are defined below.

3.2.1 Kickoff Meeting

Within one month of contract award, the Contracting Officer (CO), Contracting Officer’s Representative (COR), and LBAO’s Project Manager will schedule a Kickoff Meeting with the Contractor via webinar to discuss the project direction and schedule. Discussion topics at the meeting shall include, but are not limited to, review the requirements and deliverables of the contract, explain the roles of personnel assigned to this contract, discuss the project schedule.

3.2.2 LBAO Meetings

The Contractor shall participate in twice-a-month meetings with LBAO’s Project Manager and the LBAO’s Technical Team (i.e., Special Studies Division Manager and Special Studies Division Civil Engineer) to assess the status of the Hydrology and Hydraulic Analyses and determine if additional direction or information is needed. The Contractor shall prepare an agenda, give progress updates, record meeting notes, and solicit feedback from LBAO’s Project Manager and the LBAO’s Technical Team for each meeting. The Contractor shall participate in up to twenty (24) 1-hour teleconferences.

Two (2) hours of pre-meeting preparation is anticipated per call.

3.2.3 WMOP Technical Team Meetings

The Contractor shall participate in once-a-month meetings with LBAO’s Project Manager, LBAO’s Technical Team, and the WMOP’s Technical Team (i.e., up to five non-federal cost-share partners represented) to give updates on the progress of the Hydrology and Hydraulic Analyses. The Contractor shall prepare an agenda, give progress updates, and answer questions from LBAO’s Project Manager, LBAO’s Technical Team, and the WMOP’s Technical Team for each meeting. The Contractor shall participate in up to twelve (12) 1-hour teleconferences. Two (2) hours of pre-meeting preparation is anticipated per call.

3.3 Task 3 – Review Background Materials

The Contractor shall review the documents, models, and datasets provided by the Government, listed in Section 2.0.

3.4 Task 4 – Rain Flood and Snowmelt Flood Frequency Curve Update

3.4.1 Compile Datasets

The Contractor shall assemble the peak (instantaneous) and daily datasets needed from 1983-2020 to perform an update to the unregulated rain flood frequency and snowmelt flood frequency curves at the following locations: Boca Reservoir, Prosser Reservoir, Martis Reservoir, Truckee River at Farad and Truckee River at Reno. The peak and daily datasets shall incorporate all relevant sites (i.e., Boca Reservoir, Little Truckee River above Boca Reservoir, Little Truckee River below Boca Dam, Prosser Reservoir, Prosser Creek below Prosser Dam, Stampede Reservoir, Martis Reservoir, Martis Creek near Truckee, Truckee River at Farad, Truckee River at Reno, and possibly up to three (3) other relevant sites) including flow, inflow, storage, and release, where applicable. The Contractor shall retrieve datasets from the USGS website and where needed get reservoir release and storage datasets from the USACE personnel. The Contract shall use the guidance from the Guidelines for Determining Flood Flow Frequency Bulletin 17C (2019), Engineer Manual 1110-2-1415 Hydrologic Frequency Analysis (1993), and information found in the 1985 Water Control Manual while assembling the datasets.

The Contractor shall assess the peak and daily datasets (ranging from 1901 to 1983) used to perform the original unregulated rain flood frequency and snowmelt flood frequency curves found in the 1985 Water Control Manual. If the datasets are not available in a digitized form, the Contractor shall digitize reservoir inflow, storage, and release information, starting from impoundment of the reservoirs to 1983, which are available in the 1985 Water Control Manual. The Contractor shall retrieve flow datasets from the USGS website to develop the needed stream flow datasets back to their respective record start dates found in the 1985 Water Control Manual. The Contract shall use the guidance from the Guidelines for Determining Flood Flow Frequency Bulletin 17C (2019), Engineer Manual 1110-2-1415 Hydrologic Frequency Analysis (1993), and information found in the 1985 Water Control Manual while assembling the datasets.

The Contractor shall compile the newly assembled and original Water Control Manual peak and daily datasets needed to perform an update to the unregulated rain flood frequency and snowmelt flood frequency curves. The Contractor shall compile the datasets in HEC-Data Storage System (DSS) to prepare for input into HEC-Statistical Software Package (SSP).

The Contractor shall plot all the compiled datasets and summarize all the datasets information (i.e., location, gage name, operator/entity, record length, start of record, end of record, drainage area, measurement type, measurement units) in a table.

The Contractor shall perform and document an internal quality control review of the compiled datasets.

The Contractor shall have a Senior Hydrologist or Hydrologic Engineer review and provide comments on the compiled datasets. The Contractor shall provide the LBAO’s Technical Team the compiled datasets to review and provide comments. The Contractor shall address the comments and document changes in response to comments.

3.4.2 Develop Rain and Snowmelt Flood Annual Maximum Datasets

The Contractor shall use HEC-SSP to develop peak, 1-day, 2-day, 3-day, 5-day, 7-day, 15-day, and 30-day unregulated flow/inflow duration rain flood annual maximum datasets for the Boca Reservoir, Prosser Reservoir, Martis Reservoir, Truckee River at Farad, and Truckee River at Reno locations. Rain driven flood events shall consider the months of November through March as described in the Engineer Manual 1110-2-1415.

The Contractor shall use HEC-SSP to develop peak, 1-day, 15-day, 30-day, 60-day, 90-day, and 120-day unregulated flow/inflow duration snowmelt flood annual maximum datasets for the Boca Reservoir, Prosser Reservoir, Martis Reservoir, Truckee River at Farad, and Truckee River at Reno locations.

Snowmelt driven flood events shall consider the months of April through July as described in the Engineer Manual 1110-2-1415.

The Contractor shall summarize the unregulated annual maximum datasets for the Boca Reservoir, Prosser Reservoir, Martis Reservoir, Truckee River at Farad, and Truckee River at Reno locations in tables. The tables shall display the water year, annual maximum flow/inflow, and date of flow/inflow occurrence for each duration and for both rain and snowmelt flood datasets at each location (e.g., Plate 19-5 and Plate 20-2 in the 1985 Water Control Manual).

The Contractor shall perform and document an internal quality control review of the developed rain and snowmelt flood annual maximum datasets. The Contractor shall have a Senior Hydrologist or Hydrologic Engineer review and provide comments on the developed rain and snowmelt flood annual maximum datasets. The Contractor shall provide the LBAO’s Technical Team the developed rain and snowmelt flood annual maximum datasets to review and provide comments. The Contractor shall address the comments and document changes in response to comments.

3.4.3 Fit Curves to the Annual Maximum Datasets

The Contractor shall perform curve fitting to the annual maximum datasets using HEC-SSP. HEC-SSP has the Log Pearson Type III (LP3) probability distribution function for curve fitting and has the features necessary to follow the prescribed Guidelines for Determining Flood Flow Frequency Bulletin 17C (2019). The development of rain and snowmelt flood curves for all durations and locations shall follow the guidance of Guidelines for Determining Flood Flow Frequency Bulletin 17C (2019) and the Engineer Manual 1110-2-1415. The Contractor shall use the Bulletin 17C Expected Moments Algorithm (EMA) method available in HEC-SSP.

The Contactor shall perform the Multiple Grubbs-Beck low outlier test on both the rain flood maximum datasets and snowmelt flood maximum datasets to ensure proper curve fit. The HEC-SSP Statistical

Software Package User’s Manual describes the proper use of this tool and shall be followed for the low outlier tests.

The Contractor shall perform adjustments to the curves to prevent the rain and snowmelt flood frequency curves for each duration from crossing, if needed, as described in the Engineer Manual 1110- 2-1415. The LP3 function has the parameters, log mean, standard deviation, and skew and, if needed, shall be adjusted to ensure curves do not cross.

The Contractor shall plot the fitted curves and summarize the computed LP3 function parameters (statistics) in tables. The plots shall include a legend with LP3 function parameters tabulated and the appropriate durations for each location and flood type. The plots shall display flow and annual chance exceedance/return period in log scale (e.g., Plate 21-1 in the 1985 Water Control Manual). The tables shall provide the equivalent years of record, log mean, standard deviation, and skew for the appropriate durations for each location and flood type (e.g., Plate 19-5 in the 1985 Water Control Manual).

The Contractor shall perform and document an internal quality control review of the curve fitting, low outlier tests, curve adjustments, plots, and summary tables. The Contractor shall have a Senior Hydrologist or Hydrologic Engineer review and provide comments on the fitted curves and LP3 function parameters. The Contractor shall provide the LBAO’s Technical Team fitted curves and LP3 function parameters to review and provide comments. The Contractor shall address the comments and document changes in response to comments.

3.4.4 Document the Rain Flood and Snowmelt Flood Frequency Curve Update

The Contractor shall create a report to document the Rain Flood and Snowmelt Flood Frequency Curve Update using the Reclamation’s Visual Identity Guidelines for Publications, Reports and Template.

The Contractor shall describe in the report the compiled datasets and the processes used to compile the datasets. The Contractor shall describe in the report how the compiled datasets conform with the 1985 Water Control Manual and follows guidance from the Engineer Manual 1110-2-1415. The Contractor shall include in the report the plotted compiled datasets and summary tables.

The Contractor shall describe in the report the developed rain and snowmelt flood annual maximum datasets and the procedure used to develop the datasets. The Contractor shall describe in the report how the developed rain and snowmelt flood annual maximum datasets conform with the 1985 Water Control Manual and follows guidance from the Engineer Manual 1110-2-1415. The Contractor shall include in the report the summarized tables of the unregulated annual maximum datasets.

The Contractor shall describe in the report the curves fitted to the rain and snowmelt flood annual maximum datasets and the steps used to fit and adjust the curves. The Contractor shall describe in the report how the fitted curves follow guidance from the Engineer Manual 1110-2-1415 Hydrologic Frequency Analysis (1993) and Guidelines for Determining Flood Flow Frequency Bulletin 17C (2019).

The Contractor shall include in the report the fitted curve plots and the summarized LP3 function parameters tables.

The Contractor shall perform and document an internal quality control review of the Rain Flood and Snowmelt Flood Frequency Curve Update report. The Contractor shall have a Senior Hydrologist or Hydrologic Engineer review and provide comments on the Rain Flood and Snowmelt Flood Frequency Curve Update report. The Contractor shall address the comments and document changes in response to comments.

3.4.5 Report and Deliverables Review

The Contractor shall provide a Rain Flood and Snowmelt Flood Frequency Curve Update report as draft for review by the LBAO’s Project Manager, LBAO’s Technical Team, and WMOP’s Technical Team.

The Contractor shall respond to and address all comments from the LBAO’s Project Manager, LBAO’s Technical Team, and WMOP’s Technical Team during the review process. The Contractor shall prepare a draft-final report for back check by the LBAO’s Project Manager, LBAO’s Technical Team, and WMOP’s Technical Team to ensure that the comments on the draft report were addressed. The Contractor shall then prepare the final Rain Flood and Snowmelt Flood Frequency Curve Update report.

The Contractor shall utilize a Microsoft Excel spreadsheet supplied by Reclamation for the review that documents comments, responses and back-check/closeout of comments.

The Contractor shall prepare the Final Rain Flood and Snowmelt Flood Frequency Curve Update report, ensuring the document meets Reclamation’s 508 and Visual Identity Standards.

The Contractor shall submit the accompanying models, files, datasets, reviews listed below with each report version. For large files where ftp will be difficult, the Contractor shall ship or deliver large files on thumb drives.

• The HEC-DSS records containing the complete dataset compilation.

• The HEC-SSP model containing the rain and snowmelt flood annual maximum datasets and the fitted curves.

• Supporting figures, datasets, and workbooks developed in the Rain Flood and Snowmelt Flood

Frequency Curve Update.

• A MS Word Document reporting the Contractor internal quality control review comments, responses, and resolution.

3.5 Task 5 – Channel Capacity Analysis

3.5.1 Develop Hourly Event Datasets

The Contractor shall collect needed gage flow and stage hourly datasets from the USGS website for the five flood events listed below, for the two hydraulic models. These datasets shall be used to calibrate and validate the hydraulic models to runoff events ranging from 6,000 cfs to 14,000 cfs as measured by the Truckee River at Reno gage.

• Early March 1995 (~6k cfs peak at Reno)

• Early January 1997 (~15k cfs peak at Reno)

• Late March 1998 (~5k cfs peak at Reno)

• Late December 2005 (~12k cfs peak at Reno)

• Early February 2017 (~7.5k cfs peak at Reno)

The Contractor shall include, at a minimum, hourly datasets for the five gaged events at, Truckee River near Mogul, Truckee River at Reno, Truckee River at Vista, Truckee River near Tracy, Truckee River below Tracy, Truckee River below Derby Dam, and Truckee River at Wadsworth gage, where applicable. The hourly datasets shall support the calibration and validation of the Truckee Meadows area 2D HEC-RAS model and the Vista gage to Wadsworth gage reach 1D HEC-RAS model.

The Contractor shall prepare plots of the five gaged hourly events at each gage location. The plots shall include both flow and stage.

The Contractor shall perform and document an internal quality control review of the developed hourly datasets. The Contractor shall have a Senior Hydrologist or Hydraulic Engineer review and provide comments on the developed hourly datasets. The Contractor shall provide the LBAO’s Technical Team the developed hourly datasets to review and provide comments. The Contractor shall address the comments and document changes in response to comments.

3.5.2 Perform Calibration of Hydraulic Models

The Contractor shall tabulate the initial hydraulic parameters in Truckee Meadows area 2D HEC-RAS model and the Vista gage to Wadsworth gage reach 1D HEC-RAS model.

The Contractor shall convert the Vista gage to Wadsworth gage reach 1D HEC-RAS model to run unsteady flows.

The Contractor shall perform three calibration events for the two hydraulic models. The calibrations shall be calibrated against the gaged stage and flow hourly datasets. The following runoff events shall be used to calibrate:

• Late March 1998 (~5k cfs peak at Reno)

• Late December 2005 (~12k cfs peak at Reno)

• Early February 2017 (~7.5k cfs peak at Reno)

The Contractor shall separately adjust the hydraulic parameters of the hydraulic models to calibrate the models for all three runoff events. The hydraulic models shall be calibrated separately from each other.

The calibrated hydraulic parameters shall be within the range of acceptable hydraulic parameter values.

The Contractor shall create a total of six hydraulic parameter sets with each hydraulic model having three separate hydraulic parameter sets. The hydraulic parameter sets shall be tabulated.

The Contractor shall compare modeled stage and flow to gaged stage and flow for each calibration event for each hydraulic model. The Contractor shall plot the modeled stage and flow and gaged stage and flow for visual comparison. The Contractor shall provide summary statistics in a table (i.e., Nash- Sutcliffe) for each calibration event for each hydraulic model.

The Contractor shall finalize the hydraulic parameters by averaging them for each hydraulic model. The Contractor shall prepare a table of the averaged hydraulic parameters for each hydraulic model.

The Contractor shall perform and document an internal quality control review of the calibration of hydraulic models. The Contractor shall have a Senior Hydrologist or Hydraulic Engineer review and provide comments on the calibration of hydraulic models. The Contractor shall provide the LBAO’s Technical Team the calibration of hydraulic models to review and provide comments. The Contractor shall address the comments and document changes in response to comments.

3.5.3 Conduct Validation of Hydraulic Models

The Contractor shall conduct a validation for the two hydraulic models that have been calibrated using the following runoff events:

• Early March 1995 (~6k cfs peak at Reno)

• Early January 1997 (~15k cfs peak at Reno)

The Contractor shall simulate the two validation events using the finalized calibrated hydraulic parameters in each hydraulic model, i.e., Truckee Meadows area 2D HEC-RAS model and the Vista gage to Wadsworth gage reach 1D HEC-RAS model.

The Contractor shall compare modeled stage and flow to gaged stage and flow for each calibration event for each hydraulic model. The Contractor shall plot the modeled stage and flow and gaged stage and flow for visual comparison. The Contractor shall provide summary statistics in a table (i.e., Nash- Sutcliffe) for each validation event for each hydraulic model.

The Contractor shall perform and document an internal quality control review of the validation of hydraulic models. The Contractor shall have a Senior Hydrologist or Hydraulic Engineer review and provide comments on the validation of hydraulic models. The Contractor shall provide the LBAO’s Technical Team the validation of hydraulic models to review and provide comments. The Contractor shall address the comments and document changes in response to comments.

3.5.4 Develop and Simulate Synthetic Incremental Flow Hydrograph

The Contractor shall examine and tabulate the appropriate model accretions and depletions from the Truckee River described in the Truckee Meadows General Reevaluation Report Truckee River, Nevada, Attachment A Hydrology report by USACE.

The Contractor shall develop the hydrographic inputs necessary to simulate a synthetic flow hydrograph incrementing up from 6,000 cfs to 14,000 cfs with 500 cfs intervals. The Contractor shall use the Truckee River at Reno gage as the point of reference for the incrementing synthetic flow hydrograph.

The Contractor shall use the Truckee Meadows area 2D HEC-RAS model and the Vista gage to Wadsworth gage reach 1D HEC-RAS model in parallel. The resultant synthetic hydrograph at Truckee River at Vista gage from the Truckee Meadows area 2D HEC-RAS model shall be used as the starting synthetic hydrograph for the Vista gage to Wadsworth gage reach 1D HEC-RAS model.

The Contractor shall simulate and adjust the hydrographic inputs to best match the accretions and depletions tabulated. The accretions and depletions shall be incorporated at the Truckee River near Mogul, Truckee River at Reno, Truckee River at Vista, Truckee River near Tracy, Truckee River below Tracy, Truckee River below Derby Dam, and Truckee River at Wadsworth gage, where applicable.

The Contractor shall perform and document an internal quality control review of the developed and simulated synthetic incremental flow hydrograph. The Contractor shall have a Senior Hydrologist or Hydrologic/Hydraulic Engineer review and provide comments on the developed and simulated synthetic incremental flow hydrograph. The Contractor shall provide the LBAO’s Technical Team the developed and simulated synthetic incremental flow hydrograph to review and provide comments. The Contractor shall address the comments and document changes in response to comments.

3.5.5 Identify Channel Capacity and Develop Inundation Maps

The Contractor shall identify and document the channel capacity and the first channel breakout point location along the Truckee River from West Reno to Wadsworth using the simulation of the synthetic incremental flow hydrograph.

The Contractor shall identify and document additional channel breakout point locations that occur at flows greater than the channel capacity for flows up to 14,000 cfs in the two hydraulic models.

The Contractor shall prepare a total of seventeen (17) inundation maps for flows at Truckee River at Reno gage incrementing up from 6,000 cfs to 14,000 cfs with a 500 cfs interval. The Contractor shall include an inundation area overview map. The inundation maps shall encompass the Truckee River from West Reno to Wadsworth. The inundation maps for each flow interval shall include the number of plates necessary to encompass the Truckee River from West Reno to Wadsworth. The map scale shall be 1:12,000. The inundation map plates shall be designed to fit a D-size paper sheet (34 x 22 inches) with a half inch border. The inundation maps shall be generated in ArcMap. The inundation maps shall identify the breakout points where applicable. The inundation maps produced shall follow the guidance found in the Technical Service Center Manuals and Standards: Flood Inundation Mapping (2019).

The Contractor shall perform and document an internal quality control review of the identified channel capacity and developed inundation maps. The Contractor shall have a Senior Hydrologist or Hydrologic/Hydraulic Engineer review and provide comments on the identified channel capacity and developed inundation maps. The Contractor shall provide the LBAO’s Technical Team the identified channel capacity and developed inundation maps to review and provide comments. The Contractor shall address the comments and document changes in response to comments.

3.5.6 Document the Channel Capacity Analysis

The Contractor shall create a report to document the Channel Capacity Analysis using the Reclamation’s Visual Identity Guidelines for Publications, Reports and Template.

The Contractor shall describe in the report the developed hourly datasets for the validation and calibration efforts. The Contractor shall include in the report the plotted five flood events.

The Contractor shall describe the conversion of the Vista gage to Wadsworth gage reach 1D HEC-RAS model to run unsteady flows.

The Contractor shall describe in the report the performed calibration of the hydraulic models. The Contractor shall include in the report the tables of the initial hydraulic parameters, calibrated hydraulic parameters and final (averaged) hydraulic parameters. The Contractor shall describe in the report the adjustments to the hydraulic models needed for the three calibration events. The Contractor shall include in the report the plots and summary statistics that compare the modeled stage and flow to gaged stage and flow for each calibration event for each hydraulic model.

The Contractor shall describe in the report the validated hydraulic models. The Contractor shall include in the report the plots and summary statistics from the validation of the two events for the hydraulic models.

The Contractor shall describe in the report the developed and simulated synthetic incremental flow hydrograph. The Contractor shall include the tabulated accretions and depletions from the Truckee River described in the Truckee Meadows General Reevaluation Report Truckee River, Nevada, Attachment A Hydrology report. The Contractor shall describe in the report the adjustments to hydrographic inputs performed to best model the accretions and depletions.

The Contractor shall describe in the report identified channel capacity, breakout point locations and inundation maps created. The Contractor shall include in the report the seventeen (17) inundation maps created with all the associated plates. The Contractor shall include an inundation area overview map.

The Contractor shall perform and document an internal quality control review of the Channel Capacity Analysis report. The Contractor shall have a Senior Hydrologist or Hydraulic Engineer review and provide comments on the Channel Capacity Analysis report. The Contractor shall address the comments and document changes in response to comments.

3.5.7 Report and Deliverables Review

The Contractor shall provide a Channel Capacity Analysis report as draft for review by the LBAO’s Project Manager, LBAO’s Technical Team, and WMOP’s Technical Team. The Contractor shall respond to and address all comments from the LBAO’s Project Manager, LBAO’s Technical Team, and WMOP’s Technical Team during the review process. The Contractor shall prepare a draft-final report for back check by the LBAO’s Project Manager, LBAO’s Technical Team, and WMOP’s Technical Team to ensure that the comments on the draft report were addressed. The Contractor shall then prepare the final Channel Capacity Analysis report.

The Contractor shall utilize a Microsoft Excel spreadsheet supplied by Reclamation for the review that documents comments, responses and back-check/closeout of comments.

The Contractor shall prepare the Channel Capacity Analysis report, ensuring the document meets Reclamation’s 508 and Visual Identity Standards.

The Contractor shall submit with each report version the accompanying models, files, datasets, reviews listed below. For large files where ftp will be difficult, the Contractor shall ship or deliver large files on thumb drives.

• The HEC-DSS records containing the developed five hourly event datasets.

• The HEC-RAS models with the calibration and validation and synthetic flow hydrograph runs.

Which includes:

o Geometry, plan, and HEC-RAS mapper updated files for each run o Descriptions for each file specifying flow level, geometry used along with any special parameters used in this modeling effort.

• The HEC-DSS records containing the hydrographic inputs necessary to simulate the synthetic flow hydrograph.

• The ArcMap files used to create the inundation maps.

• Supporting figures, datasets, and workbooks developed in the Channel Capacity Analysis.

• A MS Word document reporting the Contractor’s internal review documentation.

4.0 Deliverables

Item No.

Description Content Format Medium Delivery

1 Monthly Progress Report and Invoice

Date, contract number, invoice number, date, CO, COR, task number, contract amount, % complete, current invoice amount, cumulative complete

Contractor’s choice

Adobe pdf COR, Reclamation PM; monthly

2 Project and Deliverables Schedule

See PWS Section 3.1 Tasks, Milestones

MS Project or similar

NLT 1 month after contract award

3 Draft Rain Flood and Snowmelt Flood Frequency Curve Update Report

See PWS Section 3.4.5

Reclamation’s Visual Identity Template

MS Word NLT 5 months after contract award

4 Draft-Final Rain Flood and Snowmelt Flood Frequency Curve Update Report

See PWS Section 3.4.5

Reclamation’s Visual Identity Template

MS Word NLT 1 month after Draft Report reviewed by LBAO’s Project Manager, the LBAO’s Technical Team, and the

WMOP’s

Team

5 Final Rain Flood and Snowmelt Flood Frequency Curve Update Report

See PWS Section 3.4.5

Reclamation’s Visual Identity Template

MS Word NLT 2 weeks after Draft Final Report reviewed by LBAO’s Project Manager, the LBAO’s Technical Team, and the WMOP’s Technical Team

5 Final Rain Flood and Snowmelt Flood Frequency Curve Update Accompanying Models, Files, Datasets, and Reviews

See PWS Section 3.4.5

Contractor’s choice; consult with Reclamation

PM

Various At the time of submission of the Final Channel Capacity Analysis Report

6 Draft Channel Capacity Analysis Report

See PWS Section 3.5.7

Reclamation’s Visual Identity Template

MS Word NLT 9 months after contract award

7 Draft-Final Channel Capacity Analysis Report

See PWS Section 3.5.7

Reclamation’s Visual Identity Template

MS Word NLT 1 month after Draft Report reviewed by LBAO’s Project Manager, the LBAO’s Technical Team, and the WMOP’s Technical Team

8 Final Channel Capacity Analysis Report

See PWS Section 3.5.7

Reclamation’s Visual Identity Template

MS Word NLT 2 weeks after Draft Final Report reviewed by LBAO’s Project Manager, the LBAO’s Technical Team, and the WMOP’s

Team

9 Final Channel Capacity Analysis Accompanying Models, Files, Datasets, and Reviews

See PWS Section 3.5.7

Contractor’s choice; consult with Reclamation

PM

Various At the time of submission of the Final Channel Capacity Analysis Report

6 Quality Control Plan

See PWS Section 7.7 Contractor’s Choice

MS Word NLT 1 moth after contract award

7 Document and data control plan

See PWS Section 7.8 Contractor’s Choice

MS Word NLT 1 month after contract award

8 Risk Management Matrix

See PWS Section 7.9 Contractor’s Choice

MS Excel NLT 1 month after contract award

9 Final Invoice and Release of Claims

Written “Release of Claims” signed by a Contractor employee who has the authority to make the release specified therein.

Contractor’s Choice

Adobe pdf Submit with the final invoice

4.1 Guidelines for Project Deliverables

(1) The Contractor shall document all decisions that will affect the technical aspects or the approach. The Contractor shall discuss with the COR these changes prior to initiation to determine if these changes should be incorporated for a better product.

(2) The Contractor shall provide reference material used to inform decisions; e.g., scientific literature, etc.

This material shall be submitted to the COR as an electronic packet to be used during the review cycles.

(3) The Contractor shall provide an electronic Quality Control Plan (QCP; see Section 7.7). All documents must meet or exceed the Contractor’s QCP requirements.

(4) The Contractor shall prepare all documents as draft, draft final, and final. Unless otherwise specified in this PWS.

(5) For each defined task the Contractor shall develop the analyses goals, objectives, and metrics; schedule (milestones); and the not to exceed cost for the level of effort.

(6) All reviews must document comments received, how the comments were integrated into the document or analysis and comment close-out. The Contractor shall use track changes when updating the draft report in response to comments. Key changes requiring decisions will be documented on a table that acknowledges how the document was revised. The Contractor shall conduct web meeting(s) with reviewers when key changes need discussion. The Contractor shall suggest various changes and be prepared to change the document with collaboration from the reviewers.

4.2 Document Submittals

(1) The Contractor shall provide an annotated table of contents to the COR and LBAO’s PM for approval prior to initiating work for each document submittal.

(2) All documents will be submitted as draft, draft final, and final documents unless otherwise specified in this PWS. All submitted draft, final draft and final reports must meet the contract quality control standards and follow the quality management program used by Reclamation.

(3) Any accompanying models, files, datasets, and reviews used in the analyses shall be documented and submitted to the COR and LBAO’s PM as an electronic packet to be used during the review cycles.

(4) The draft-final and final versions of the documents shall be submitted as complete, ready to be published documents. This means the document will have a table of contents, all tables and figures, and complete appendices.

(5) The Contractor shall provide an ftp website or similar system to facilitate the transfer of large files between Reclamation and the Contractor. For large files where ftp will be difficult, the Contractor shall ship or deliver large files on thumb drives.

(6) The Final Rain Flood and Snowmelt Flood Frequency Curve Update and Channel Capacity Analysis reports must meet Reclamation’s 508 and Visual Identity Standards.

(7) One (1) electronic copy of each deliverable shall be submitted.

5.0 Type of Contract

The government will award a Firm-Fixed Price type contract.

6.0 Period of Performance

The period of performance for the project is from the Date of Award to September 30, 2022.

7.0 Administrative Information

(1) Government will not furnish any property, services, utilities, etc.

(2) All deliverables (other than invoices) shall be delivered to the COR at LBAO on the specified due dates listed in Section 4.0.

(3) All electronic deliverables to be posted externally will be Section 508 Amendment to the Rehabilitation Act of 1973 compliant.

(4) All electronic deliverables to be posted and all materials made available to the general public will meet Reclamation’s Visual Identity Standards.

(5) All draft electronic deliverables shall be MS Word and all final deliverables will be in both MS Word and PDF formats.

7.1 Recognized Holidays

(1) New Year’s Day (6) Labor Day

(2) Martin Luther King Jr.’s Birthday (7) Columbus Day

(3) President’s Day (8) Veteran’s Day

(4) Memorial Day (9) Thanksgiving Day

(5) Independence Day (10) Christmas Day

7.2 Hours of Operations

The Contractor is responsible for conducting business, between the hours 0800 to 1700 Monday thru Friday except Federal holidays or when the Government facility is closed due to local or national emergencies, administrative closings, or similar Government directed facility closings. The Contractor must at all times maintain an adequate workforce for the uninterrupted performance of all tasks defined within this PWS when the Government facility is not closed for the above reasons. When hiring personnel, the Contractor shall keep in mind that the stability and continuity of the workforce are essential.

7.3 Place of Performance

All of the work to be performed under this contract will be performed at the Contractor’s office. Reclamation will not be providing an area office or space for the Contractor to work.

7.4 Security

The Contractor shall be responsible for obtaining rights-of entry and/or permission from Reclamation or District and/or private landowners regarding any in-person meetings.

The Contractor shall be responsible for safeguarding all government equipment, information and property provided for Contractor use. At the close of each work period, government facilities, equipment, and materials shall be secured.

7.5 Data Rights and Compatible Software

The following FAR Clause 52.227-14 applies to all data for this project. FAR Part 27, Subpart 27.4 Rights in Data and Copyrights. Specifically: 27.401-1 Unlimited rights data.

Contractor shall coordinate with the COR as to compatible software and to ensure that GIS data meets the Reclamation standards for importation into Reclamation’s database. Compatible Software includes:

(1) Word Processing: Microsoft Word

(2) Electronic Spreadsheets: Microsoft Excel

(3) Electronic Document Distribution Format: Adobe Portable Document Format

(4) Scheduling Software: Microsoft Project

(5) Text Graphics: Microsoft PowerPoint

(6) Data Base: Microsoft Access

(7) Geographic Information Systems: CAD, ArcMap, AutoCad

7.6 Contractor Personnel

Contractor shall name a project manager and other key personnel and provide an organizational chart with the names and reporting structure to Reclamation. The Contractor’s project manager shall be the primary contact for Reclamation’s CO and the COR. Resumes for the project manager and key technical staff shall be provided.

The Contractor’s project manager and other key personnel cannot be changed unless Reclamation agrees in writing to the change. The Contractor’s project manager is to take no direction from any source other than Reclamation’s Contracting Officer during the course of this work; particularly direction that deviates from the requirements stated in this PWS.

The Contractor and its personnel should have the appropriate education, knowledge, expertise, and experience to accomplish the project. The Contractor’s technical staff should have appropriate hydrology and hydraulic experience related to the preparation, analysis, and execution of the Rain and Snowmelt Flood Frequency Curve Update and Channel Capacity Analysis. The Contractor’s technical staff shall be experienced hydrologist(s) and/ or hydrologic/hydraulic engineer(s) in the areas of USACE hydrology and hydraulic projects, preferably in the State of California and/or Nevada.

At a minimum the Contractor personnel shall include the following:

Project Manager shall have at least 5 years of experience managing water resource projects. The Project Manager shall have documented experience in using the Project Management Body of Knowledge Guide for managing projects.

Senior Hydrologist or Hydrologic/Hydraulic Engineer shall have at least 15 years of experience in performing and reviewing hydrology and hydraulic analyses. The Senior Hydrologist or Hydrologic/Hydraulic Engineer shall have prior experience with HEC-RAS modeling, and HEC-SSP performing Flood Frequency Analyses.

Hydrologist or Hydrologic/Hydraulic Engineer shall have at least 3 years of experience in water resources projects. The Hydrologist or Hydrologic/Hydraulic Engineer shall have prior experience with HEC-RAS modeling and mapping rivers, and HEC-SSP performing Flood Frequency Analyses.

GIS Specialist shall have at least 3 years of experience creating map products including the development of inundation maps.

7.7 Quality Control Plan

Contractor shall complete a Quality Control Plan (QCP) that demonstrates how they will ensure quality of work performed by their staff or their subcontractors. All quality control review forms shall be submitted with the deliverables to Reclamation.

In compliance with the contract clause, the Contractor shall provide a QCP to the COR. The Contractor shall make any modifications required to the plan and obtain Government approval before the contract start date. The Contractor is responsible for subcontractor performance and quality. Reclamation shall be notified if the subcontractor is not performing or meeting the contract schedules.

The Contractor shall communicate the objectives and scope for each task with any subcontractors. The Contractor shall ensure that the subcontractors are provided reasonable timeframes to complete and provide their work product including the technical and quality review cycles. Contractor shall designate milestones at which time the subcontractor work is reviewed and the COR is apprised of the effort.

Records documenting quality shall be kept and made available to the CO and COR (when requested) throughout the contract performance period and for the period after contract completion, until final settlement of any claims under this contract.

7.8 Records

All records, files, metadata, model runs, coding, models, documents, emails, notes, calculations, and data are the property of the Federal government. The Contractor shall be responsible for creating and maintaining required records specifically cited in this PWS or required by the provisions of a mandatory directive listed in Applicable Publications and Forms. Contractor shall prepare a Document and Data Control Plan that outlines how the records will be managed and closed out at the end of the project. If requested by Reclamation, the Contractor shall provide the original record or data files including any metadata, or a reproducible copy of any such records, within five working days of receipt of the request.

7.9 Risk Management

Contractor shall complete a Risk Management Matrix that demonstrates how they will manage risks that may impede goals, objectives, success, and schedule. The Risk Management Matrix shall be used for identifying, prioritizing and tracking risks. The Contractor shall apprise the subcontractors of the risks and the consequences associated with their tasks.

8.0 Performance Assessment and Disincentives

8.1 Monitoring Performance

The COR will track Contractor performance during the evaluation period. Interim (mid-term) evaluations may be provided to identify strengths and weaknesses in the Contractor's performance during the period being evaluated.