Merrick & Co 20190508 varies LiDAR terrain mapping for the Colorado Water Conservation Board (CWCB) 3DEP Eastern Colorado Lidar project. This QL2 area is delivered in Colorado South NAD83(2011), units feet, vertical NAVD 88 Geoid 12B, units feet. The classified lidar (.las), DEM .tif and the Intensity .tif files are delivered in tile format (3000ft by 3000ft). The breaklines are delivered in Projectwide ESRI geodatabase feature class format. The Raw lidar is delivered in swath format. The lidar (.las) files adhere to the National Enhanced Elevation Assessment (NEEA) Quality Level 2 standards, two points or greater per square meter. LiDAR terrain mapping to the Colorado Water Conservation Board (CWCB) for all or portions of Weld, Morgan, Adams, Arapahoe, Denver, Douglas, Elbert, El Paso, Lincoln, Pueblo, Otero, Las Animas, and Huerfano Counties. Represents a high-resolution data set of lidar for an Area of Interest (AOI) totaling approximately 18,348.89 square miles. The Colorado Central AOI requires Quality Level Two (QL2) deliverable products and is approximately 7234 square miles and 22809 3000 by 3000ft tiles Project Name: 3DEP Eastern Colorado Lidar Task Order No.: 2019-1 Master Task Order Contract No.: MA PDAA 2018*005 Task Order Contract No.: CMS#105275 USGS-NGP Base Lidar Specification v1.2 Optech Galaxy Airborne Laser Terrain Mappers (ALTM) SN5060380 and SN5060385 8 0.7 2 0.7 2 2300 170 30 62 250 3.5 1.05 1064 1 0.25 1233 20 National Geodetic Survey (NGS) Geoid12B 0 0 0 0 0 0 0 1.4 6 Withheld (ignore) points were identified in these files using the standard LAS withheld bit. Swath "overage" points were identified in these files using the standard LAS overlap bit. 12 1 Unclassified 2 Ground 7 Low Noise 9 Water 10 Ignore Breakline 17 Bridge 18 High Noise 20180506 20180725 ground condition Complete Unknown -105.075512 -103.128354 39.753632 38.496304 3121452.77716659 3666973.68682025 1699679.26687524 1250008.42450951 None Breaklines Elevation Data Lidar DEM Intensity None Eastern Colorado No restrictions apply to these data. None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data Thuy Patton Colorado Water Conservation Board Floodplain Mapping Coordinator mailing and physical address

1313 Sherman St., Rm. 718

Denver CO 80224 303-866-3441 x3230 thuy.patton@state.co.us Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095 Data covers the entire area specified for this project. These LAS data files include all data points collected. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist. The raw point cloud is of good quality and data passes Non-Vegetated Vertical Accuracy specifications. Breaklines have been inspected for completeness and correct geographic placement. Digital Elevation Models derived from the point cloud provide complete coverage over the project area, without voids. This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class. Merrick & Co 20190109 spreadsheet Greenwood Village, Co Merrick & Co None None 1200 disc 2018 ground condition Lidar Checkpoints 376 NVA check points, 249 VVA check points, 186 Calibration points Merrick & Co 20190109 las data Greenwood Village, Co Merrick & Co None None 1200 disc 20180506 20180725 ground condition Lidar ASPRS LAS 1.4 QL2 specifications, two points per square meter. Raw Swath: LIDAR data was collected using Optech Galaxy sensor. The raw data was verified in MARS software for complete coverage of the project area, and boresighted to align the flightlines. Raw swath calibrated LAS 1.4 files are classified as class = 0. Two points per square meter (QL2). Lidar checkpoints 20190211 Merrick & Co Doug Jacoby mailing and physical address

5970 Greenwood Plaza Blvd

Greenwood Village CO 80111 USA 303-353-3903 303-751-2581 doug.jacoby@merrick.com 8:00-5:00pm MST If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours. Classified lidar tiles: Lidar data was collected using Optech Galaxy sensor. The raw data was verified in MARS software for complete coverage of the project area, and boresighted to align the flightlines. Raw data files were parsed into manageable client-specific tiles. These tiles were then processed through automated filtering that separates the data into different classification groups: unclassified points, ground points, low noise, water, ignored ground, bridge decks and high noise. The data was next taken into MARS to reclassify the erroneous points that may remain in the lidar point cloud after auto filter. Two points per square meter (QL2). Lidar checkpoints 20190211 Merrick & Co Doug Jacoby mailing and physical address

5970 Greenwood Plaza Blvd

Greenwood Village CO 80111 USA 303-353-3903 303-751-2581 doug.jacoby@merrick.com 8:00-5:00pm MST If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours. Breaklines: Using MARS software hydro-flattened breaklines (rivers greater than 100 feet wide and waterbodies greater than two square acres) were compiled. Some bridges could potentially need breaklines placed under them so that water will flow properly. Using intensity values and 3d elevations generates ESRI shape files which are then imported into an ESRI gdb for a project-wide delivery. Monotonicity checks where validated (water flowing downstream). Lidar 20190211 Merrick & Co Doug Jacoby mailing and physical address

5970 Greenwood Plaza Blvd

Greenwood Village CO 80111 USA 303-353-3903 303-751-2581 doug.jacoby@merrick.com 8:00-5:00pm MST If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours. DEM raster: Using MARS software a two-foot (2ft) DEM GeoTiff (.tif) file was created using the ground classified lidar points along with the breaklines. The files are delivered in 3000ft by 3000ft tiles. Lidar 20190211 Merrick & Co Doug Jacoby mailing and physical address

5970 Greenwood Plaza Blvd

Greenwood Village CO 80111 USA 303-353-3903 303-751-2581 doug.jacoby@merrick.com 8:00-5:00pm MST If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours. Intensity raster: Using MARS software a two-foot (2ft) Intensity GeoTiff (.tif) file was created using all lidar returns intensity value (8bit unsigned integer). The files are delivered in 3000ft by 3000ft tiles. Lidar 20190211 Merrick & Co Doug Jacoby mailing and physical address

5970 Greenwood Plaza Blvd

Greenwood Village CO 80111 USA 303-353-3903 303-751-2581 doug.jacoby@merrick.com 8:00-5:00pm MST If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours. Point Point 1 State Plane Coordinate System 1983 0502 38.450000 39.750000 -105.500000 37.833333 3000000.000316 999999.999996 coordinate pair 0.001 0.001 survey feet D_NAD_1983_2011 Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988 Geoid12B 0.001 feet Explicit elevation coordinate included with horizontal coordinates 20190508 Merrick & Co mailing and physical address

5970 Greenwood Plaza Blvd

Greenwood Village CO 80111 USA 303-353-3903 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998