dpug meeting – may 16, 2013 jerry corr elizabeth crawley habitat management, inc

DPUG Meeting – May 16, 2013

Jerry Corr

Elizabeth Crawley

Habitat Management, Inc.

Overview• Why we undertook this project

• Need in Market to Improve Cadastral Data but• Limited Budgets

• Help Clients to Improve Land Maps• Find a Better, Faster, Cheaper Way to Improve Coordinates.• Survey Grade not Required• Identify Areas Where Survey is Required

Current Situation• Increasing Accuracy Requirements• Survey Data of Undefined or Insufficient Accuracy• 200 Year Old Documents• Survey Data Digitized from Topographic Maps• Well Locations Calculated from Footages / QQs• Lease Boundaries and Wells Aligned to Legacy Grids

GCDB Geoprocessing Issue• GCDB Mismatches between Big Horn and Johnson counties

Project Objectives• Is this a Feasible Idea?• Rapid Data Acquisition• Timely Data Acquisition• Improved Metadata

• Improve Schema Design• Photographs• Supplemental Information (State Board)• Corner Quality Information

Business Drivers• Need to Improve Data

• Fit to Imagery• Publish Maps with Ownership on “Right Side” of Street.• Establish Published Corners / Control Points on the Map.• Proper Schema• Photographs• Create a “Regulatory Grid”• Improve Data to Meet Increased Regulatory Spacing

Requirements.

Phase 1

Littleton:• Out of 49 section corners:• 7 found, 8 unidentified• Discrepancies between 6.5-80ft

East of Boulder• 39 wells• Discrepancies between 0.8-10.5ft• One was plugged and reclaimed

T 1N R 66W

Ft. Lupton

Decade # of Records1970 81980 171990 212000 22010 1

https://doraimage.state.co.us/L:Hkq3WH1Y0j12N1ZH/

Out of 49 section corners:• 30 found• 7 were calculated from witness monuments• Discrepancies between 8.324-103.15ft• Average discrepancy = 32.548ft• 11 out of 55 were outside the error of 40ft• 2 were double marked

Findings

40 ft

Oil/Gas WellsFt. Lupton

Findings• Number of wells used for the study: 49

• Discrepancy Range: 0.336-23.216ft

• Average Discrepancy = 6.564ft

• 20 wells that have been plugged

Questions

Elizabeth Crawley, Habitat Management, IncEmail: ecrawley@habitatmanagementinc.com

Robert White, WhiteStarEmail: rwhite@whitestar.com